Patent Application
20230043795
The present invention generally relates to surgical systems and procedures for correcting alignment between two bones or bone segments spanning a joint or an osteotomy, and particularly relates to surgical systems and procedures for correcting a bunion in a patient's foot.
Bone misalignment and/or deformation can be a source of discomfort and reduced mobility in patients, particularly in a patient's feet. One particularly common foot disorder is a bunion. Bunions are a progressive disorder, typically beginning with a leaning of the great toe. The leaning of the great toe may gradually change an angle of the bones and produce a characteristic bump on the medial side of the metatarsal near the joint of the metatarsal with the proximal phalanx. Specifically, the bunion is the prominence made of bone and at times an inflamed bursa. Hallux valgus is the condition in which the great toe deviates from the normal position toward the direction of the second toe. Accordingly, the present invention is directed to surgical systems and procedures for correction of bunions, Hallux valgus, and for bone realignments more generally.
The foregoing summary is illustrative only and is not intended to be limiting. Other aspects, features, and advantages of the systems, devices, and methods and/or other subject matter described in this application will become apparent in the teachings set forth below. The summary is provided to introduce a selection of some of the concepts of this disclosure. The summary is not intended to identify key or essential features of any subject matter described herein.
According to one aspect of the disclosure, a method for correcting alignment between a first bone and a second bone by fusing a joint between the first bone and the second bone includes providing a first guide. The first guide includes a first end portion with a first cannula aligned along a first axis. A second end portion has a second cannula aligned along a second axis. The first axis is non-parallel with the second axis. The first axis is configured to intersect the first bone and the second axis is configured to intersect the second bone when the first and second bones are in a deformed configuration. A first k-wire is inserted through the first cannula and into the first bone. A second k-wire is inserted through the second cannula and into the second bone. The first guide is removed from the first and second k-wires. A second guide includes a first end portion with a first cannula. A second end portion has a second cannula. The first cannula is parallel with the second cannula. The second guide slides over the first and second k-wires. The first k-wire is received within the first cannula of the second guide and the second k-wire is received within the second cannula of the second guide. The second guide acts on the first and second k-wires to re-align the first and second bones into a corrected configuration.
In another aspect, the method includes fixing the first and second bones in the corrected configuration and removing the second guide and the first and second k-wires from the first and second bones.
In another aspect, the method includes fixing the first and second bones in the corrected configuration includes inserting a first stabilizing wire into the first and second bones.
In another aspect, the method includes attaching a first end of a bone plate with the first bone and a second end of the bone plate with the second bone such that the first and second bones are retained in the corrected configuration.
In another aspect, the method includes inserting a bone plate clip into the first and second bones.
In another aspect, the method includes resecting a first end of the first bone.
In another aspect, the first end portion of the first guide includes a third cannula aligned parallel with the first axis.
In another aspect, the method includes inserting a third k-wire into the first bone through the third cannula and resecting the first end of the first bone includes inserting a first resecting guide over the first and third k-wires to align the first resecting guide with the first end of the first bone.
In another aspect, the method includes resecting a first end of the second bone.
In another aspect, the second end of the first guide includes a fourth cannula aligned parallel with the second axis.
In another aspect, the method includes resecting the first end of the second bone.
In another aspect, the method includes inserting a second resecting guide over the second k-wire and a fourth k-wire inserted in the second bone to align the second resecting guide with the first end of the second bone.
In another aspect, the first bone is a metatarsal, the second bone is a medial cuneiform bone, the deformed configuration of the first and second bones includes a bunion and the corrected configuration of the first and second bones corrects the bunion.
In another aspect, the second guide adjusts an angle of the first bone in three orthogonal planes between the deformed configuration and the corrected configuration.
In another aspect, the second guide adjusts a position of the first bone in three orthogonal planes between the deformed configuration and the corrected configuration.
In another aspect, the method includes centering the first guide between the first bone and the second bone by inserting a centering k-wire through a centering cannula on the first guide.
In another aspect, the method includes removing the first guide from the first and second k-wires includes at least partially disassembling the first guide.
In another aspect, the method includes scanning the first bone and the second bone in the deformed configuration to render a 3D model thereof including a first virtual bone and a second virtual bone in a virtual deformed configuration, adjusting the first virtual bone and the second virtual bone in the 3D model to align the first virtual bone and the second virtual bone in a virtual corrected configuration, fixing a first virtual axis relative to the first virtual bone and fixing a second virtual axis relative to the second virtual bone in the virtual corrected configuration, the first virtual axis is parallel with the second virtual axis, and returning the first and second virtual bones to the virtual deformed configuration, the first and second virtual axes defining a correction factor therebetween in the virtual deformed configuration.
In another aspect, the method includes identifying a virtual resection plane where the first virtual bone and the second virtual bone overlap in the virtual corrected configuration, and fixing the first virtual axis relative to the first virtual bone includes aligning the first virtual axis parallel with the virtual resection plane.
In another aspect, the method includes forming the first guide based on the correction factor.
In another aspect, the correction factor includes a first virtual vector passing through a first virtual point in a virtual coordinate plane and a second virtual vector passing through a second virtual point in the virtual coordinate plane.
In another aspect, forming the first guide includes correlating the virtual coordinate plane with a coordinate plane of the first guide such that the first axis corresponds with the first virtual vector and the first virtual point and the second axis aligned corresponds with the second virtual vector and the second virtual point.
In another aspect, each of the correction factors includes a position vector and two direction vectors corresponding to the first and second axis of the respective guides within the plurality of guides.
In another aspect, the first guide is selected from a plurality of guides, each of the plurality of guides has a different angle between the first and second axes.
According to another aspect, a method of manufacturing a kit for correcting alignment between a first bone and a second bone includes receiving a correction factor, the correction factor including a first virtual vector passing through a first virtual point in a virtual coordinate plane and a second virtual vector passing through a second virtual point in the virtual coordinate plane.
A first guide is formed based on the correction factor, the first guide including a first end portion having a first cannula aligned along a first axis and a second end portion having a second cannula aligned along a second axis. The first axis corresponds to the first virtual vector and the first virtual point and the second axis corresponds to the second virtual vector and the second virtual point, the first and second axes is non-parallel. The first guide is configured such that a first k-wire inserted through the first cannula intersects the first bone and a second k-wire inserted through the second cannula intersects the second bone in a deformed configuration.
In another aspect, the method includes receiving dimensions of a second guide, the second guide including a first end portion with a first cannula and a second end portion with a second cannula. The first cannula is parallel with the second cannula. The first guide is configured such that when sliding the second guide over the first and second k-wires, the first and second k-wires are received within the respective first and second cannula of the second guide and the second guide re-aligns the first and second bones into a corrected configuration.
In another aspect, the method includes receiving a scan of the first bone and the second bone in the deformed configuration to render a 3D model thereof including a first virtual bone and a second virtual bone in a virtual deformed configuration. The first virtual bone and the second virtual bone are adjusted in the 3D model to align the first virtual bone and the second virtual bone in a virtual corrected configuration. A first virtual axis is fixed relative to the first virtual bone and a second virtual axis is fixed relative to the second virtual bone in the virtual corrected configuration. The first virtual axis is parallel with the second virtual axis. The first and second virtual bones are returned to the virtual deformed configuration along with the first and second virtual axes defining the first and second virtual vectors and the first and second virtual points, respectively, of the correction factor.
In another aspect, the method includes identifying a virtual resection plane where the first virtual bone and the second virtual bone overlap in the virtual corrected configuration and fixing the first virtual axis relative to the first virtual bone includes aligning the first virtual axis parallel with the virtual resection plane.
According to another aspect of the disclosure, a kit for correcting alignment between a first bone and a second bone by fusing a joint between the first bone and the second bone includes a first guide. The first guide includes a first end portion with a first cannula aligned along a first axis and a second end portion with a second cannula aligned along a second axis. The first axis is non-parallel with the second axis. The first guide is configured such that inserting a first k-wire through the first cannula intersects the first bone and inserting a second k-wire through the second cannula intersects the second bone when the first and second bones are in a deformed configuration. A second guide includes a first end portion with a first cannula and a second end portion with a second cannula. The first cannula can be parallel with the second cannula. The second guide is configured such that when the first k-wire is fixed within the first bone and the second k-wire is fixed within the second bone in the deformed configuration, sliding the second guide over first and second k-wires, with the first and second k-wires is received within the respective first and second cannula of the second guide, re-aligns the first and second bones into a corrected configuration.
In another aspect, a stabilizing wire fixes the first and second bones in the corrected configuration by insertion into the first and second bones.
In another aspect, a bone plate with a first end configured to be attached with the first bone and a second end of the bone plate configured to be attached with the second bone retains the first and second bones in the corrected configuration.
In another aspect, a bone plate clip inserts into the first and second bones in the corrected configuration.
In another aspect, a first resecting guide aligns a resecting tool with a resection location on the first bone.
In another aspect, the first resecting guide includes first and second cannulas configured to be advanced over the first k-wire and a third k-wire, the third k-wire is parallel with the first k-wire.
In another aspect, a second resecting guide aligns the resecting tool with a resection location on the second bone.
According to another aspect, a method for correcting alignment between a first bone and a second bone by fusing a joint between the first bone and the second bone includes aligning a first end portion of a first guide with the first bone. The first end portion has a first cannula and a second cannula aligned in a first direction. A first k-wire is inserted through the first cannula and into the first bone and a second k-wire through the second cannula and into the first bone. A first end of the first bone is resected through a slot to form a first resected face. The slot aligns with the first end of the first bone by the first and second k-wires. A third k-wire and a fourth k-wire insert through the first guide into the second bone. A first end of the second bone is resected to form a second resected face. A second guide slides over the first, second, third and fourth k-wires to adjust a position of the first and second bones such that the first and second resected faces abut in a corrected configuration. The first and second bones are fixed in the corrected configuration.
In another aspect, the method includes fixing the first and second bones in the corrected configuration by inserting a stabilizing wire into the first and second bones.
In another aspect, the method includes fixing the first and second bones in the corrected configuration by attaching a first end of a bone plate with the first bone and a second end of the bone plate with the second bone such that the first and second bones are retained in the corrected configuration.
In another aspect, the method includes sliding the second guide over the first, second, third and fourth k-wires to translate the first resected face towards the second resected face.
In another aspect, the method includes sliding the second guide over the first, second, third and fourth k-wires to rotate alignment between the first bone and the second bone.
In another aspect, the third k-wire and the fourth k-wire are inserted into the second bone through a second end portion of the first guide including a third cannula and a fourth cannula. The third and fourth cannula are aligned in a second direction.
In another aspect, the first end of the second bone is resected through the slot. The slot is aligned with the first end of the second bone by the third and fourth k-wires.
In another aspect, the slot is on a resection guide including first and second apertures configured to align with the first and second k-wires.
In another aspect, the first bone is a metatarsal, the second bone is a medial cuneiform bone and the corrected configuration of the first and second bones corrects a bunion.
In another aspect, the second guide adjusts an angle of the first bone in three orthogonal planes between a deformed configuration and the corrected configuration.
In another aspect, the method includes removing the first guide from the first and second k-wires after resecting the first end of the second bone to form the second resected face.
In another aspect, the method includes removing the second guide and the first, second, third, and fourth k-wires from the first and second bones after fixing the first and second bones in the corrected configuration.
According to another aspect, a method for correcting alignment between a first bone and a second bone by fusing a joint between the first bone and the second bone includes positioning a cutting guide in a first position proximate to a first end of the first bone, the cutting guide including a cutting slot and a first and second cannula through the cutting guide. The cutting guide in the first position includes a first and second k-wire positioned through the first and second cannula and into the first bone. A first end of the first bone is resected through the cutting slot to form a first resected face. The cutting guide is removed from the first and second k-wires. The cutting guide is positioned in a second position proximate to a first end of the second bone. The cutting guide in the second position includes a third and fourth k-wires positioned through the first and second cannula and into the second bone. A first end of the second bone is resected through the cutting slot to form a second resected face. The cutting guide is removed from the third and fourth k-wires. A second guide slides over the first, second, third and fourth k-wires. The second guide adjusts a position of the first and second bones such that the first and second resected faces abut in a corrected configuration. The first and second bones are fixed in the corrected configuration.
In another aspect, positioning a first end portion of a first guide with the first bone, the first end portion having a third cannula and a fourth cannula, the third and fourth cannula aligned in a first direction and inserting the first k-wire through the third cannula and into the first bone and the second k-wire through the fourth cannula and into the first bone.
In another aspect, positioning a second end portion of the first guide with the second bone, the second end portion having a fifth cannula and a sixth cannula, the fifth and sixth cannula aligned in a second direction and inserting the third k-wire through the fifth cannula and into the second bone and the fourth k-wire through the sixth cannula and into the second bone.
In another aspect, fixing the first and second bones in the corrected configuration includes inserting a stabilizing wire into the first and second bones.
In another aspect, fixing the first and second bones in the corrected configuration includes attaching a first end of a bone plate with the first bone and a second end of the bone plate with the second bone such that the first and second bones are retained in the corrected configuration.
In another aspect, sliding the second guide over the first, second, third and fourth k-wires translates the first resected face towards the second resected face.
In another aspect, sliding the second guide over the first, second, third and fourth k-wires rotates the first bone relative to the second bone to adjust an alignment therebetween.
Various examples are depicted in the accompanying drawings for illustrative purposes, and should in no way be interpreted as limiting the scope of the examples. Various features of different disclosed examples can be combined to form additional examples, which are part of this disclosure.
Bunion correction or repair is a common surgery with over 100,000 surgeries performed annually in the US. Many surgical procedures for bunion repair are invasive and painful, requiring an incision of several inches and a long period of convalescence, of up to 10-12 weeks. Minimally invasive surgery has been performed in orthopedics for decades. One common procedure is known as a Lapidus bunionectomy. In a Lapidus bunionectomy, the bunion is corrected at the great toe by adjusting alignment at the first tarsometatarsal joint. The metatarsal can also be stabilized using bone screws and/or a plate to facilitate fusion between the metatarsal and the medial cuneiform bone.
However, existing Lapidus bunionectomy procedures have various drawbacks and risks. These drawbacks include requiring more than minimally invasive surgery, the use of a realignment apparatus that exhibits little control over rotation and relative angles of the metatarsal bone, procedures that rely on in-surgery trial-and-error to identify the best alignment of the patient's foot bones and in-surgery judgment to identify locations for performing resections, lack of customization to account for individual patient foot conditions, and/or a lack of usable guides for performing pre-planned resections of the foot bones. Various aspects of the bone repositioning systems and procedures described herein overcome and improve upon these existing procedures, leading to better patient outcomes.
The various features and advantages of the systems, devices, and methods for bone repositioning described herein will become more fully apparent from the following description of the examples illustrated in the figures. These examples are intended to illustrate the principles of this disclosure, and this disclosure should not be limited to merely the illustrated examples. The features of the illustrated examples can be modified, combined, removed, and/or substituted as will be apparent to those of ordinary skill in the art upon consideration of the principles disclosed herein.
The patient's foot 100 can further include a medial cuneiform bone 104. The medial cuneiform bone 104 can be connected with a proximal end of the first metatarsal 108 (e.g., by one or more ligaments). A tarsometatarsal (TMT) joint joins the medial cuneiform bone 104 to the first metatarsal 108. Thus, reference below is made to the TMT joint. Therefore, while the medial cuneiform bone 104 and the first metatarsal 108 can define first and second bones, respectively, it should be appreciated that first and second bones can apply to any alternative anatomical bones or bone segments that are separated by any suitable joint or, alternatively, an osteotomy. Accordingly, description below to the TMT joint can apply to other joints or, alternatively, an osteotomy. A distal direction is defined from the medial cuneiform bone 104 toward the metatarsal 108. Conversely, a proximal direction is defined from the metatarsal 108 toward the medial cuneiform bone 104.
As shown in
As shown in
The removable tube 240 can define the first cannula 210. When installed within the aperture 210a, the first cannula 210 can be aligned along the axis 230 of the aperture 210a. The removable tube 242 can define the second cannula 212. When installed within the aperture 212a, the second cannula 212 can be aligned along the axis 232 of the aperture 212a. The first and second cannulas 210 and 212 can define different diameters therethrough. The cannula 212 can have a greater diameter than the cannula 210 (or vice-versa). In other implementations, the first and second cannulas 210 and 212 can define the same different diameters therethrough. In other implementations, the first and second cannulas 210 and 212 can define varying diameters therethrough.
The alignment guide 200 can include a second portion 208. The second end portion 208 can include at least one distal cannula 215 such as third and fourth cannulas 214 and 216. The second portion 208 can define a distal end portion of the alignment guide 200, and the at least one cannula can define at least one distal cannula. The third and fourth cannulas 214 and 216 can be defined through a body of the alignment guide 200 and/or through respect extensions 219, 218 thereof. Although two cannula are described and illustrated, more or fewer cannulas can be included on the second end portion 208. Moreover, the second end portion 208 can include removable inserts or removable portions (e.g., removable tubes) around the third and fourth cannula 214 and 216. The third and fourth cannulas 214 and 216 can also be referred to as first and second distal cannulas 214 and 216 respectively.
The third and fourth cannulas 214 and 216 can extend all the way through the alignment guide 200 (e.g., including the extensions 218, 219). The third and fourth cannulas 214 and 216 can define different diameters therethrough. The third cannula 214 can have a greater diameter than the fourth cannula 216 (or vice-versa). In other implementations, the third and fourth cannulas 214 and 216 can define the same different diameters therethrough. In other implementations, the third and fourth cannulas 214 and 216 can define varying diameters therethrough.
The third and fourth cannula 214 and 216 can be aligned along respective parallel axes 234, 236. The axes 234, 236 can be spaced apart a distance 208a. The distance 204a can be based on a length of the metatarsal bone 108.
Together, the relative positions of the points PA and PB and at least two of the relative angles α, β, and γ can define the axis of the cannula on the alignment guide 200. Using the proper selection of the relative angles α, β, and/or γ, and/or the relative positions of the points PA and PB of the alignment guide 200 can be used to correctly align the bones in the patient's foot 100, as described further below.
As shown in
At least one proximal temporary fixation device, such as at least one proximal k-wire, can be inserted through the at least one proximal cannula of the alignment guide 200 and into the cuneiform bone 104. For instance, a first k-wire 252 can be driven through the cannula 210 and into the medial cuneiform 104. The first k-wire 252 can be inserted at a first insertion point 254 on the medial cuneiform bone 104. A second k-wire 256 can be driven through the cannula 212 and into the medial cuneiform bone 104. The second k-wire 256 can be inserted through the medial cuneiform bone 104 at a second insertion point 258. The first and second k-wires 252 and 256 can be referred to as first and second proximal k-wires respectively. The first and second insertion points 254 and 258 can be referred to as proximal insertion points.
At least one distal temporary fixation device, such as at least one distal k-wire, can be inserted through the at least one distal cannula of the alignment guide 200 and into the metatarsal 108. A third k-wire 260 can be driven through the cannula 214 and into the metatarsal 108. The third k-wire 260 can intersect and be inserted into the metatarsal 108 at a third insertion point 262. A fourth k-wire 264 can be driven through the fourth cannula 216 and into the metatarsal 108. The fourth k-wire 264 can be inserted into the metatarsal 108 at a fourth insertion point 266. The third and fourth k-wires 260 and 264 can be referred to as first and second distal k-wires respectively. The third and fourth insertion points 262 and 266 can be referred to as first and second distal insertion points respectively. The alignment guide 200 can be positioned such that the first and second cannulas 210 and 212 and the third and fourth cannulas 214 and 216, and thus the first and second k-wires 252 and 256 and the third and fourth k-wire 260 and 264, extend medially from the medial cuneiform bone 104 and the first metatarsal 108, respectively. Alternatively, the alignment guide 200 can be positioned such that the first and second cannulas 210 and 212 and the third and fourth cannulas 214 and 216, and thus the first and second k-wires 252 and 256 and the third and fourth k-wire 260 and 264, extend superiorly from the medial cuneiform bone 104 and the first metatarsal 108, respectively, as described below with respect to the alignment guide 300 (see
The first and second k-wires 252, 256 can be parallel with each other, based on the parallel cannula 210, 212. The third and fourth k-wires 260, 264 can be parallel with each other, based on the cannula 214, 216. One or more of the insertion points 254, 258, 262, 266 (e.g., at least one on each bone 104, 108) can be in predetermined locations on the patient's foot. The lengths of the extensions 218, 219 and/or the tubes 240, 242 can provide greater stability to the k-wires 250 that are received therein. Diameters of the k-wires 250 can be sized according to the diameters of the respective cannula of the alignment guide 200 to ensure accurate insertion at angles into the bone 104, 108. Moreover, the k-wires 250 can be matched to the correct cannula based on different diameter sizes.
The first and second k-wires 252 and 256 can be referred to as proximal k-wires 251, and the third and fourth k-wires 260 and 264 can be referred to as distal k-wires 253 that are disposed distal of the proximal k-wires 251. The first and second cannulas 210 and 212 of the alignment guide 200 can be referred to as proximal cannulas of the alignment guide. The third and fourth cannulas 214 and 216 of the alignment guide can be referred to as distal cannulas of the alignment guide 200 that are disposed distal of the proximal cannulas of the alignment guide 200. The proximal k-wires 251 are configured to be inserted into respective ones of the proximal cannulas 213 and into the cuneiform bone 104. The distal k-wires 253 are configured to be inserted into respective ones of the distal cannulas and into the metatarsal 108. While the system can include two proximal k-wires 251 and two distal k-wires 253 in one example, it should be appreciated that the system can include any number of proximal and distal k-wires including at least one. Thus, at least one proximal k-wire 251 can be inserted through at least one proximal cannula 213 and into the cuneiform bone 104, and at least one distal k-wire 253 can be inserted through at least one distal cannula 215 and into the metatarsal 108.
Referring now to
Referring now to
The alignment guide 300 can include at least one proximal cannula, such as a first cannula 310 and a second cannula 312 that extend through the guide body 301 from the outer surface 305 to the bone-facing surface 303. The first and second cannulas 310 and 312 can be referred to as first and second proximal cannulas. In one example, the first and second cannulas 310 and 312 can extend through the first end portion 304. The first and second cannulas 310 and 312 can be arranged such that the second cannula 312 is offset from the first cannula 310 in the distal direction. The first and second cannulas 310 and 312 can extend through the guide body 301 along respective first and second central axes 330 and 332. In one example, the central axes 330 and 332 can be parallel to each other as they extend in a direction from the outer surface 305 to the bone-facing surface 303 (also referred to as a bone-facing direction). Alternatively, the central axes 330 and 332 can diverge from each other as they extend in the bone-facing direction. Alternatively still, the central axes 330 and 332 can converge toward each other as they extend in the bone-facing direction. The cannulas 310 and 312 can be chamfered at either or both of the outer surface 305 and the bone-facing surface 303. The central axes 330 and 332 can be spaced apart a distance 307 that is based on a length of the cuneiform bone 104. Therefore, the system can include a kit of alignment guides 300 having different distances 304 as desired. Although the at least one proximal cannula is shown and described as including two cannulas, more or fewer cannulas can be defined by the at least one proximal cannula.
As will be described in more detail below, the first and second cannulas 310 and 312 can each be sized and configured to receive respective first and second k-wires 252 and 256 (see
It should be appreciated that in one example, the first and second cannulas 310 and 312 can be defined by the guide body 301. In another example described above with respect to the alignment guide 200, the first and second cannulas 310 and 312 can be defined by respective removable tubes of the alignment guide 300 that are inserted into respective apertures of the guide body 301. In both examples, it can be said that the alignment guide 300 defines the first and second cannulas 310 and 312.
The alignment guide 300 can further define at least one distal cannula such as third and fourth cannulas 314 and 316. The third and fourth cannulas 314 and 316 can also be referred to as first and second distal cannulas. In particular, the alignment guide 300 can define an aperture 313 that extends through the guide body 301 along the bone-facing direction. For instance, the aperture 313 can extend through the second end portion 308 of the guide body 301. The aperture 313 can be sized to receive the insert 311. In particular, the insert 311 can be removably inserted into the aperture 313. The aperture 313 can be open to a medial side of the second end portion 308 at an opening 315 that can extend laterally into the second end portion 308. Further, the aperture can extend from the outer surface 305 to the bone-facing surface 303. Respective ends 371 that define the proximal and distal ends of the opening 315 can be disposed outboard of the cannulas of the insert 311, as will now be described.
Referring now to
The third and fourth cannulas 314 and 316 can extend along respective third and fourth central axes 334 and 336, respectively, through the insert 311. The third and fourth cannulas 314 and 316 can define different diameters therethrough. The third cannula 314 can have a greater diameter than the fourth cannula 316. Alternatively, the fourth cannula 316 can have a greater diameter than the third cannula 314. In other implementations, the third and fourth cannulas 314 and 316 can define the same different diameters therethrough. In other implementations, either or both of the third and fourth cannulas 314 and 316 can define varying diameters therethrough.
In one example, the central axes 334 and 336 can extend parallel to each other as they extend in a direction from the outer surface 373 to the bone-facing surface 371 (also referred to as a bone-facing direction). Alternatively, the central axes 334 and 336 can diverge from each other as they extend in the bone-facing direction. Alternatively still, the central axes 334 and 336 can converge toward each other as they extend in the bone-facing direction. The axes 334 and 336 can be spaced apart a longitudinal distance 309. The distance 309 can be based on a length of the metatarsal bone 108. Therefore, the kit of alignment guides 300 can have different distances 309 as desired. The opening 315 to the aperture 313 can have a longitudinal distance greater than the distance 309 so as to accommodate the distal k-wires upon removal of the guide body 301 from the patient's foot 100. Although the at least one distal cannula is shown and described as including two cannulas, more or fewer cannulas can be defined by the at least one distal cannula. The cannulas 314 and 316 can be chamfered at either or both of the outer surface 373 and the bone-facing surface 371.
The insert portion 368 of the insert 311 can define a shoulder 380. In particular, the seat portion 370 can have a cross-sectional dimension perpendicular to the bone-facing direction that is greater than a corresponding cross-sectional dimension of the aperture 313. Accordingly, the seat portion 370 is sized so that it is not insertable into or through the aperture 313 of the guide body 301 in the bone-facing direction. The insert portion 368 is sized for insertion through the aperture 313 in the bone-facing direction. Therefore, the extent of the seat portion 370 that extends out with respect to the insert portion 368 in a direction perpendicular to the bone-facing direction can define the shoulder 380. During operation, as shown at
Referring also to
It should be appreciated that as described above with respect to the alignment guide 200, the alignment guide 300 can define the angle α between the central axis 330 of the first cannula 310 and the axis 236 of the fourth cannula 316 (see
Referring again to
The guide 300 can further include a joint alignment cannula 319 that extends through the guide body 301 at a location between the proximal cannulas and the aperture 313. In particular, the joint alignment cannula 319 can extend through the intermediate portion 317. Thus, the joint alignment cannula 319 can be disposed distal of the first and second cannulas 310 and 312. The joint alignment cannula 319 can extend from the outer surface 305 to the inner surface 303 along a respective central axis 321. In one example, the central axis 321 can lie on a common plane with the first and second central axes 330 and 332. The central axis 321 can be oriented parallel with the first and second central axes 330 and 332. Alternatively, the central axis 321 can be angularly offset with respect to the first and second central axes 330 and 332 within the common plane. The joint alignment cannula 319 can have a diameter that is different than the diameter of either or both of the first and second cannulas 310 and 312. For instance, the diameter of the joint alignment cannula 319 can be greater than the diameter of either or both of the first and second cannulas 310 and 312. Thus, a k-wire that fits through the joint alignment cannula 319 can be sized too big to fit through either of the first and second cannulas 310 and 312. Alternatively, the diameter of the joint alignment cannula 319 can be equal to the diameter of the first and second cannulas 310 and 312.
The first end portion 304 can define a position and orientation of a first set of cannula (e.g., cannulas 310 and 312). The second end portion 308 and the insert 311 can define a position and orientation of a second set of cannula (e.g., the third and fourth cannula 314 and 316). The first set of cannula and the second set of cannula can be offset from each other and/or angled with respect to each other as described herein.
During operation, referring to
As illustrated in
During operation, the joint k-wire 372 is driven distally such that the distal end portion 377 is inserted into the joint 369. The joint k-wire 372, and in particular the distal end portion 377, can be rotated as the distal end portion 377 is inserted into the joint 369, such that the cutting teeth 379 cut into the distal end of the medial cuneiform 104 and the proximal end of the first metatarsal 108 that define the joint 369. Alternatively, the joint k-wire 372 can be rotated after the distal end portion 377 has been inserted into the joint 369. It should be appreciated that once the joint k-wire 372 has been inserted into the joint 369, the joint 369 is maintained in tension. The distal end of the medial cuneiform bone 104 and the proximal end of the first metatarsal 108 thereby apply a compressive retention force onto the joint k-wire 372 that retains the joint k-wire 372 in the joint 369 along the desired predetermined trajectory. In some examples, the joint k-wire 372 can include at least one helical thread at the outer surface of the shaft 375 that extends about the central axis of the joint k-wire 372 at a location distal of the cutting teeth 379. Therefore, the joint k-wire 372 can be rotated about its central axis as it is inserted into the joint, thereby advancing the joint k-wire 372 into the joint, such that the cutting teeth 379 cut into the distal end of the medial cuneiform 104 and the proximal end of the first metatarsal 108 as described above.
In an alternative embodiment shown in
Next, referring to
Next, referring to
At least one proximal temporary fixation device, such as at least one proximal k-wire, can be inserted through the at least one proximal cannula of the alignment guide 300 and into the medial cuneiform bone 104. For instance, a first k-wire 252 can be driven through the first cannula 310 and into the medial cuneiform 104. The first cannula 310 can be sized to guide the first k-wire 252 along the first central axis 330 as it is driven into the medial cuneiform bone 104. A second k-wire 256 can be driven through the cannula 312 and into the medial cuneiform bone 104. The second cannula 312 can be sized to guide the second k-wire 256 along the second central axis 332 as it is driven into the medial cuneiform bone 104. The first and second k-wires 354 and 356 can be referred to as first and second proximal k-wires respectively. The second cannula 312 and the second k-wire 256 can be disposed distal of the first cannula 310 and the first k-wire 252. The first and second k-wires 252 and 256 can be referred to as proximal k-wires.
At least one distal temporary fixation device, such as at least one distal k-wire, can be inserted through the at least one distal cannula of the alignment guide 300 and into the metatarsal 108. For instance, a third k-wire 260 can be driven through the third cannula 314 and into the first metatarsal 108. The third cannula 314 can be sized to guide the third k-wire 260 along the third central axis 334 (see
The alignment guide 300 can be positioned such that the first and second cannulas 310 and 312 and the third and fourth cannulas 314 and 316, and thus the first and second k-wires 252 and 256 and the third and fourth k-wire 260 and 264, extend superiorly from the medial cuneiform bone 104 and the first metatarsal 108, respectively. Alternatively, the alignment guide 300 can be positioned such that the first and second cannulas 310 and 312 and the third and fourth cannulas 314 and 316, and thus the first and second k-wires 252 and 256 and the third and fourth k-wire 260 and 264, extend medially from the medial cuneiform bone 104 and the first metatarsal 108, respectively.
The first and second k-wires 252 and 256 can be oriented parallel with each other, as defined by their trajectories along the respective first and second central axes 330 and 332. Similarly, the third and fourth k-wires 260 and 264 can be oriented parallel with each other, as defined by their trajectories along the respective third and fourth central axes 334 and 336. Each of the k-wires 350 can be driven into the respective medial cuneiform bone 104 or the first metatarsal bone 108 at respective insertion points that can be predetermined on the patient's foot.
Referring now to
Referring now to
The resection guide 404 can include a cannulated portion 411. The cannulated portion 411 can include one or more apertures 415, 417. The resection guide 404 can include a plane portion 409. The plane portion can include a slot 407 for aligning the resecting tool. The apertures 415, 417 can interact with one or more k-wires (e.g., k-wires 250) or pins to align the plane portion 409 with the desired target location for the resection tool.
The plane portion 409 (e.g., a plane defining the slot 407) can be generally perpendicular with the cannulated portion 411 (e.g., an axis between the apertures 415, 417). In other implementations, the plane portion 409 can be angled with respect to the cannulated portion 411.
The apertures 415, 417 can extend through the cannulated portion 411. The apertures 415, 417 can be sized to align with the k-wires or pins. The slot 407 can extend through the plane portion 409. The slot 407 can have a height and thickness sized to accommodate the cutting portion of the resection tool. The slot 407 can have a depth sufficient to maintain alignment of the resection tool with the desired target location.
Depending on a planned corrected configuration of the first cuneiform bone 104 with the metatarsal 108, it may be necessary to remove material from one or both inner ends of the cuneiform bone 104 and the metatarsal 108. The angle between the cuneiform bone 104 and the metatarsal 108 can be adjusted in the corrected configuration. The lengths of one or both of the cuneiform bone 104 and the metatarsal 108 can also be adjusted in the corrected configuration. Each of these adjustments can contribute to the correction of the deformity in the patient's foot 100.
Accordingly,
The cannulated portion 411 of the second resection guide 408 can be received over the third and fourth k-wires 260, 264 on apertures 415, 417, respectively. The third and fourth k-wires can align the plane portion 409 and a slot 407 with the end of the metatarsal bone 108. A resection plane 108a can be cut into the metatarsal bone 108 using a resecting tool through the slot 407. The resection plane 108a can be aligned with the third and fourth k-wires 260, 264. In some implementations, the resection guide 404 can be used to form the resection plane 108a instead of the section resection guide 408.
As shown in
The correction guide 500 can include a second end portion 508 that extends distally with respect to the first end portion 504. The inner and outer surfaces 501 and 503 can be defined by the first end portion 504 and the second end portion 508. In one example, the first and portion 504 and the second end portion 508 can define a single monolithic unitary structure. Thus, the first and second end portions 504 and 508 can be positionally fixed with respect to each other. The first end portion 504 can be referred to as a proximal end portion, and the second end portion 508 can be referred to as a distal end portion. The correction guide 500 can include at least one distal cannula 515 such as third and fourth cannulas 514 and 516 that extend through the correction guide 500, and in particular through the second end portion 508. The third and fourth cannulas 514 and 516 can correspond to the third and fourth k-wires 260 and 264, respectively, which have been previously driven at least into or through the metatarsal bone 108. The third and fourth cannulas 514 and 516 can extend along respective third and fourth central axes 534 and 536, respectively. The third and fourth central axes 534 and 536 can be parallel to each other, or can alternatively be oriented at any suitable angle relative to each other as desired.
The first and second cannulas 510 and 512 can be referred to as proximal cannulas 513 of the correction guide 500, and the third and fourth cannulas 514 and 516 can be referred to as distal cannulas 515 of the correction guide that are spaced distally from the proximal cannulas 513. The proximal k-wires 251 are configured to be driven into cuneiform bone 104 in the manner described above, and inserted into respective ones of the proximal cannulas 513. The distal k-wires 253 are configured to be driven into the metatarsal 108 in the manner described above, and inserted into respective ones of the distal cannulas 515. While the system can include two proximal k-wires 251 and two distal k-wires 253 in one example, it should be appreciated that the system can include any number of proximal and distal k-wires including at least one. Thus, at least one proximal k-wire 251 can be inserted through at least one proximal cannula 513 and into the cuneiform bone 104, and at least one distal k-wire 253 can be inserted through at least one distal cannula 515 and into the metatarsal 108.
The proximal and distal cannulas 513 and 515, respectively, extend through the correction guide from the outer surface 503 to the inner surface 501. The first cannula 510 can extend through the outer surface 503, such that the first central axis 530 extend through a point PC. The point PC can have a position (x, y, z) in the Cartesian coordinate plane. Similarly, the fourth cannula 516 can extend through the outer surface 503, such that the fourth central axis 536 extend through a point PD that has a respective position (x, y, z) in the Cartesian coordinate plane. The points PC and PD can define a relative position of the first and fourth central axes 530 and 536 in the Cartesian coordinate system.
As shown in
The first and second central axes 530 and 532 can have a predetermined angular relationship with respect to the third and fourth central axes 534 and 536 from a view from the frontal plane. In one example shown at
The correction guide 500 can align the metatarsal bone 108 relative to the medial cuneiform bone 104 as it is advances on the k-wires 250. In particular, the first and second proximal k-wires 252 and 256 are received by the first and second proximal cannulas 510 and 512, respectively, and the third and fourth distal k-wires 260 and 264 are received by the third and fourth distal cannulas 514 and 516, respectively. The first and second k-wires 252 and 256 can be oriented along the first and second central axes 530 and 532, respectively, and the third and fourth k-wires 260 and 264 can be oriented along the third and fourth central axes 534 and 536, respectively. The correction guide 500 thus causes the proximal k-wires to move to thereby assume the predetermined angular relationship with the distal k-wires. As the at least one distal k-wire moves relative to the at least one proximal k-wire, the at least one distal k-wire causes the first metatarsal 108 to correspondingly move with respect to the medial cuneiform bone 104 and the second metatarsal bone 109. Thus, the correction guide 500 can cause the distal k-wires to rotate in the frontal plane, which in turn causes the metatarsal 108 to rotate in the frontal plane with respect to the cuneiform bone 104 in a direction of rotation. The direction of rotation can be in the counterclockwise direction in the frontal plane (that is, from a view of the frontal plane in the proximal direction). The correction guide 500 can therefore orient the distal k-wires 260 and 264, and thus the metatarsal bone 108 and the proximal phalanx 112, into the corrected configuration 103. Re-orientation of the metatarsal 108 relative to the medial cuneiform bone 104 can include rotation and/or translation of the metatarsal 108 in the Cartesian coordinate system (e.g., in three orthogonal planes). The degree of rotation and/or translation of the metatarsal 108 can be determined based on the angles α, β, and/or γ, and/or any differences in the relative positions of the axes between the alignment guide 200 and the correction guide 500 (e.g., any differences in the relative positions defined by points A, B and points C, D). In one example, the correction guide 500 can cause the at least one distal k-wire 253 to rotate in the frontal plane, for instance in a clockwise direction with respect to a view from the frontal plane. Thus, the metatarsal 108 similarly rotates in the clockwise direction in the frontal plane. Because the first and second central axes 530 and 532 can be oriented parallel with respect to the third and fourth central axes 534 and 536, the correction guide 500 does not compress or distract the TMT joint 369 as it receives the proximal and distal k-wires 251 and 253.
The corrected configuration 103 can include one or more corrections to the alignment of the bones of the patient's foot 100. For example, the metatarsal 108 can be generally aligned with the proximal phalanx 112 of the great toe. The corrected configuration 103 can reduce or eliminate the bunion and/or hallux valgus deformity. The resected face 104a of the medial cuneiform bone 104 can be abutted against the resected face 108a of the metatarsal bone 108. This abutment can promote the union or fusion of the metatarsal 108 with the medial cuneiform bone 104. Proper abutment can require translation of the metatarsal 108 relative to the medial cuneiform bone 104.
Referring now to
While the first and second k-wires 252, 256 can be received within the first and second cannula 510 and 512, respectively, on the first end 504 of the correction guide 500, and the third and fourth k-wires 260 and 264 can be received within the third and fourth cannula 514 and 516, respectively, on the second end 508 of the correction guide 500, it should be appreciated that any number of k-wires in the cuneiform bone 104 and the metatarsal bone 108 can be inserted through respective cannulas of the correction guide as desired.
As shown in
As shown in
As shown in
The first end 704 of the bone plate 710 can have a plurality of apertures 715, 716, 717. The apertures 716, 717 can be sized to receiver the fasteners 730. The aperture 715 can be sized to receive the prong 724 of the clip 720. The second end 708 of the bone plate 710 can have a plurality of apertures 711, 712, 713. The apertures 711, 712 can be sized to receive the fasteners 730. The aperture 713 can be sized to receive the prong 728 of the clip 720. The clip 720 can include a recess 719 for receiving, or at least partially receiving, the transverse member 726 of the clip 720. This can reduce the overall profile of the assembled bone plate assembly 700.
The clip 720 can span across the joint between the medial cuneiform bone 104 and the metatarsal bone 108. The first prong 724 can be received within aperture 715 and into the metatarsal bone 108. The second prong 728 can be received through the aperture 713 and into the medial cuneiform bone 104. In certain implementations, the prongs 724, 728 can be received within the respective intersections 258, 262. The prongs 724, 728 can include a plurality of serrated edges for enhanced engagement features for attaching within the bones in the patient's foot 100.
In certain implementations, different alignment guides 200 can be used depending on the intended fixation means for the medial cuneiform bone 104 with the metatarsal bone 108. The different alignment guides 200 can include cannula that align the k-wires 250 at different points in the bone to match apertures in the different fixation means.
The virtual model 840 can include virtual representations of the bones of the patient's foot. The virtual model 840 can include a virtual deformed configuration 802 of the patient's bones. The virtual model 840 can include a virtual first bone 804 and a virtual second bone 808. The virtual first bone 804 can correspond to a medial cuneiform bone in the patient's foot and the virtual second bone 808 can correspond to a metatarsal.
The virtual model 840 can be displayed to a user through a graphical user interface (e.g., on a computer). The virtual model 840 can be manipulable by a user. In some implementations, the virtual model 840 can approximate the natural connections (e.g., ligaments, cartilage, and/or muscles) between bones in the patient's foot. Accordingly, movements of one virtual bone can alter the location of connected virtual bones. In other implementations, the virtual bones of the model 840 can be freely moved and manipulated by a user. Accordingly, feasible re-positioning of the bones and resultant movements of connected virtual bones can be approximated based on the skill and knowledge of a user.
At step 814, a user adjusts the configuration of first and second virtual bones 804, 808 into a virtual corrected configuration 803. The virtual corrected configuration 803 can include correction of one or more deformities of the patient's foot. Adjustment into the virtual corrected configuration 803 can include changing relative angles and positions between the first and second virtual bones 804, 808. Moreover, the virtual corrected configuration 803 can include one or more overlapping portions of the first and second virtual bones 804, 808. One or more virtual resection planes 804a, 808a, can be identified by a user to remove overlapping portions of the first and second virtual bones 804, 808 or otherwise adjust the lengths and dimensions thereof.
At step 816, a first virtual axis 830 is added to intersect the first virtual bone 804. A second virtual axis 836 is added to intersect the second virtual bone 808. The first virtual axis 830 is fixed relative to the first virtual bone 804. The second virtual axis 836 is fixed relative to the second virtual bone 808. The first and second virtual axes 830, 836 can be aligned with the virtual model 840 at a location that is easily accessible during surgery of the patient's foot.
The first and second virtual axes 830, 836 are parallel with each other. Advantageously, the first and second virtual axes 830, 836 can be aligned with one or more of the virtual resection planes 804a, 808a. The first virtual axis 830 extends through a point PG located in a virtual Cartesian coordinate system. The second virtual axis 836 extends through a point PH located in the virtual Cartesian coordinate system.
At step 818, the first and second virtual bones 804, 808 are returned to the original deformed configuration 802 of the model 840. The first and second virtual axes 830, 836 are rotated to different angles and/or translated relative to each other into the deformed configuration 802 from the corrected configuration 803. In the deformed configuration 802, the first and second virtual axes 830, 836 can be defined as vectors passing through respective point PE and PF, respectively, within the virtual Cartesian coordinate system.
At step 820, the relative positions of the first and second virtual axes 830, 836 in the deformed configuration 802 can be used to define a correction factor for an alignment guide. The relative positions can include relative angles in two or more of the virtual Cartesian coordinate system planes (e.g., z-x, z-y, x-y). The relative angles can correspond to the α, β, and/or γ angles in the alignment guide (e.g., alignment guide 200 or the like). The relative positions of the first and second virtual axes 830 and 836 can be based on the respective points PE and PF. The points PE and PF can correspond to the respective points PA and PB of the alignment guide (e.g., alignment guide 200 or the like). Thus, the dimensions of the virtual model 840 can be used to form the correction factor of an alignment guide for use in surgery on the patient's foot.
Furthermore, the relative positions of the first and second virtual axes 830, 836 in the corrected configuration 803 can be used to define dimensions of a correction guide. The points PG and PH can correspond to the respective points PC and PD of the correction guide (e.g., correction guide 500 or the like). The first and second virtual axes 830, 836 in the corrected configuration 803 can correspond to the parallel axes of the cannula in the correction guide.
Furthermore, the relative positions of the first and second virtual axes 830, 836 in the deformed configuration 802 can be used to define dimensions of a resection guide. The dimensions can include an orientation of a slot (e.g., slot 407) in the resection guide. The slot can be aligned parallel with one or more of the resection planes 804a, 808a. The resection guide can also include one or more apertures aligned with the first and/or second virtual axes 830, 836 in the deformed configuration 802.
As an alternative to creating the model 803, a user (e.g., a surgeon) could describe the angles (α, β, and/or γ) and/or translations needed to correct the deformities in the patient's foot 100. This description can be based on a user's knowledge and experience and/or in conjunction with viewing a scan of the patient's foot 100. The user-provided information can indicate the alignment guide 200 needed during in surgery. For example, a user can be provided a kit with multiple alignment guides and select among a pre-determined set of alignment guides 200 that each correct different, but commonly seen deformations in a patient's foot. In certain implementations, the alignment guide 200 can include multiple sets of cannula that correspond to different correction factors.
Referring to
At step 914, the manufacturer can form the alignment guide based on the correction factor. For example, the manufacture can 3D print the alignment guide.
At step 916, the manufacturer can receive dimensions for creating a correction guide. The dimensions for the correction guide can be based on the process 800 described above or otherwise customized to an individual patient's foot.
At step 918, the manufacturer can form the correction guide based on the received dimensions. For example, the manufacture can 3D print the correction guide.
It is further appreciated that in some instances the final configuration 103 (see
Accordingly, referring now also to
The auxiliary correction guide 620 can define at least one proximal cannula and at least one distal cannula that are configured to receive respective temporary fixation elements, such as k-wires, that were previously secured to the medial cuneiform bone 104 and the first metatarsal 108. The auxiliary correction guide 620 can be coupled to the k-wires after the medial cuneiform bone 104 and the first metatarsal 108 have been moved to the corrected configuration, and is configured to move either or both of the medial cuneiform bone 104 and the first metatarsal 108 from the corrected configuration to the adjusted configuration. The at least one proximal cannula can extend through the guide body 301, and in particular the first end portion 624, from the outer surface 625 to the bone-facing surface 623. The at least one distal cannula can extend through the guide body 301, and in particular the second end portion 626, from the outer surface 625 to the bone-facing surface 623.
The at least one proximal cannula can include a first cannula 630 and a second cannula 632 that extend through the guide body 622 from the outer surface 625 to the bone-facing surface 623. The first and second cannulas 630 and 632 can be referred to as first and second proximal cannulas. In one example, the first and second cannulas 630 and 632 can extend through the first end portion 624. The first and second cannulas 630 and 632 can be arranged such that the second cannula 632 is offset from the first cannula 630 in the distal direction. The first and second cannulas 630 and 632 can extend through the guide body 622 along respective first and second central axes 634 and 636. In one example, the central axes 634 and 636 can be parallel to each other as they extend in a direction from the outer surface 625 to the bone-facing surface 623 (also referred to as a bone-facing direction). Alternatively, the central axes 634 and 636 can diverge from each other as they extend in the bone-facing direction. Alternatively still, the central axes 634 and 636 can converge toward each other as they extend in the bone-facing direction. The cannulas 630 and 632 can be chamfered at either or both of the outer surface 625 and the bone-facing surface 623. The central axes 634 and 636 can be spaced apart a distance 307 that can be the same distance as the distance along which the first and second central axes 530 and 532 of the correction guide 500 (see
It should be appreciated that in one example, the first and second cannulas 630 and 632 can be defined by the guide body 622. In another example described herein, the first and second cannulas 630 and 632 can be defined by respective removable tubes or inserts that can be inserted into the guide body 622. In both examples, it can be said that the auxiliary correction guide 620 defines the first and second cannulas 630 and 632.
The auxiliary correction guide 620 can further define at least one distal cannula such as third and fourth cannulas 638 and 640. The third and fourth cannulas 638 and 640 can also be referred to as first and second distal cannulas. The third and fourth cannulas 638 and 640 extend through the guide body 622 from the outer surface 625 to the bone-facing surface 623. In particular, the third and fourth cannulas 638 and 640 can extend through the second end portion 626. The fourth cannula 640 can be spaced from the third cannula 638 in the distal direction. The third and fourth cannulas 638 and 640 can extend through the guide body 622 along respective third and fourth central axes 642 and 644. The cannulas 638 and 640 can be chamfered at either or both of the outer surface 625 and the bone-facing surface 623. In one example, the central axes 642 and 644 can extend parallel to each other as they extend in a direction from the outer surface 625 to the bone-facing surface 623 (also referred to as a bone-facing direction). Alternatively, the central axes 642 and 644 can diverge from each other as they extend in the bone-facing direction. Alternatively still, the central axes 642 and 644 can converge toward each other as they extend in the bone-facing direction.
The central axes 642 and 644 can be spaced apart a distance that can be the same distance as the distance along which the third and fourth central axes 534 and 536, respectively, of the correction guide 500 (see
The second end portion 626 can be laterally offset with respect to the first end portion 624. In one example, the intermediate portion 628 can be offset so as to jog laterally as it extends from the first end portion 624 to the second end portion 626. Accordingly, the third and fourth cannulas 638 and 640 can be offset laterally with respect to the first and second cannulas 630 and 632. The first and second central axes 634 and 636 can lie on a first plane, and the third and fourth central axes 642 and 644 can lie on a second plane that is angularly offset with respect to the first plane. In one example, the third and fourth central axes 642 and 644 can converge at an angle θ (see
Further, at the bone-facing surface 623, the third and fourth central axes 642 and 644 can be offset with respect to the first and second central axes 634 and 636 in the lateral direction by an offset distance D (see
Alternatively, at the bone-facing surface 623, the third and fourth central axes 642 and 644 at the bone-facing surface 623 can be offset with respect to the first and second central axes 634 and 636 in the medial direction. Thus, the distance D can define an offset in the medial direction. Thus, as described in more detail below, the auxiliary correction guide 620 can be configured to receive the k-wires which causes the first metatarsal to translate toward or away from the second metatarsal.
It should be appreciated that the auxiliary correction guide 620 is illustrated showing the angle θ as the counterclockwise angle described above, and the offset distance D as a lateral offset. The auxiliary correction guide 620 can alternatively define the angle θ without the offset distance D. Alternatively still, the auxiliary correction guide 620 can define the offset distance D without the angle θ. Thus, the auxiliary correction guide 620 can define either or both of the offset distance D and the angle θ. Thus, the auxiliary correction guide 620 can define the offset distance D alone or in combination with the angle θ. Alternatively, the auxiliary correction guide 620 can define the angle θ alone or in combination with the offset distance D.
Referring now also to
It should be appreciated that the system can include a kit of auxiliary correction guides 620 and 620′, each including guides that have at least one different parameter than at least one other of the guides. The at least one parameter can be defined by either or both of the angle θ and the distance D. A select one of the auxiliary correction guides 620 can be selected for use based on the desired correction of the patient's foot.
Although the at least one proximal cannula and the at least one distal cannula are shown and described as including two cannulas, respectively, more or fewer cannulas can be defined by auxiliary correction guide 620 as desired.
During operation, referring to
However, referring now also to
Therefore, as shown at
Thus, when the auxiliary correction guide 620 is juxtaposed with the correction guide 500 of
Accordingly, when the auxiliary correction guide 620 is installed such that the k-wires are received in the cannulas of the auxiliary correction guide 620, the auxiliary correction guide 620 can cause the distal k-wires to rotate in the first direction of rotation with respect to the proximal k-wires, which in turn causes the metatarsal 108 to rotate in the first direction of rotation with respect to the cuneiform bone 104 in the counterclockwise direction to the second rotational position R2. Alternatively or additionally, the cannulas of the auxiliary correction guide 620 can cause the distal k-wires to translate laterally with respect to the proximal k-wires in the first direction of translation, which causes the first metatarsal 108 to correspondingly translate in the first direction of translation toward the second metatarsal 109 from the first translational position to the second translational position so as to define the second distance D2 from the second metatarsal 109 that is less than the first distance D1. The first phalanx 112 can also move toward the second phalanx 115 to the from the configuration to the adjusted configuration.
During use, as described above with respect to the correction guide 500, the auxiliary correction guide 620 can compress the TMT joint 369 as it receives the proximal and distal k-wires 251 and 253 and is driven toward the cuneiform bone 104 and the metatarsal 108. In this regard, the auxiliary correction guide 620 can be configured for a combination of realignment and compression of the cuneiform bone 104 and the metatarsal 108, and thus can be referred to as an auxiliary “realignment and compressor block” (e.g., an auxiliary RAC block).
Once the auxiliary correction guide 620 has been installed over the proximal and distal k-wires, the first or proximal fixing k-wire 610 can then be inserted into the medial cuneiform bone 104 and the metatarsal bone 108, and the second or distal fixing k-wire 612 can be inserted through the metatarsal 108 and into the medial cuneiform bone 104 as described above with respect to
In other examples, it can be determined that the bones of the patient's foot have been overcorrected by the correction guide 500. Thus, after the correction guide has been removed, the auxiliary correction guide 620′ of
The second portion 1008 can include at least one distal cannula 1015, such as third and fourth cannulas 1014 and 1016. The cannulas 1014 and 1016 can extend through the second portion 1008. The cannulas 1014 and 1016 can extend along central axes 1024 and 1026, respectively. The central axes 1014 and 1016 can be parallel with each other. The axes 1020 and 1022 can be nonparallel with the axes 1024 and 1026. The cannulas 1014 and 1016 can be referred to as first and second distal cannulas, respectively, that are disposed distal of the proximal cannula 1013.
The alignment guide 1000 can include a centering cannula 1009 that can receive a k-wire that extends into the TMT joint between the medial cuneiform bone 104 and the metatarsal 108, thereby aligning a predetermined location of the alignment guide 1000 with the tarsometatarsal joint. Accordingly, the at least one proximal cannula 1013 can be aligned with the medial cuneiform bone 104, and the at least one distal cannula 1015 can be aligned with the metatarsal 108. The centering cannula 1009 can be disposed between the at least one proximal cannula 1013 and the at least one distal cannula 1015. The centering cannula 1009 can be disposed in an intermediate portion that extends between the first and second portions 1004 and 1008, or can be disposed in either of the first and second portion 1004 and 1008.
As shown in
The second portion 1008 can include a recess 1008a. The first portion 1004 can include a projection portion 1004b. The projection portion 1004b can be received within the recessed portion 1008a. The recess/protrusion arrangement can enhance the stability of the coupling between the first portion 1004 and the second portion 1008.
The centering cannula 1009 can align the alignment guide 1000 at the tarsometatarsal joint between the medial cuneiform bone 104 and the metatarsal 108. A k-wire (not shown) can extend through the centering cannula 1009 and into the space between the medial cuneiform bone 104 and the metatarsal 108. The first end 1004 of the alignment guide 1000 can be generally aligned with the medial cuneiform bone 104. The second end 1008 of the alignment guide 1000 can be generally aligned with the metatarsal 108. As shown further in
The first and second k-wires 1310 and 1312 can be referred to as first and second proximal k-wires, and the third and fourth k-wires 1314 and 1316 can be referred to as first and second distal k-wires that are disposed distal of the proximal k-wires. The proximal k-wires are configured to be inserted into respective ones of the proximal cannulas 1013 and into the cuneiform bone 104. The distal k-wires are configured to be inserted into respective ones of the distal cannulas 1015 and into the metatarsal 108. While the system can include two proximal k-wires and two distal k-wires in one example, it should be appreciated that the system can include any number of proximal and distal k-wires including at least one. Thus, at least one proximal k-wire 1301 can be inserted through at least one proximal cannula 1013 and into the cuneiform bone 104, and at least one distal k-wire 1303 can be inserted through at least one distal cannula 1015 and into the metatarsal 108.
As shown in
As shown in
As shown in
In the corrected configuration 103, a fixing k-wire 1600 (or similar mechanism) can be inserted to fix the positions of the first metatarsal 108 and the medial cuneiform bone 104. As shown in
Terms of orientation used herein, such as “top,” “bottom,” “proximal,” “distal,” “longitudinal,” “lateral,” and “end,” are used in the context of the illustrated example. However, the present disclosure should not be limited to the illustrated orientation. Indeed, other orientations are possible and are within the scope of this disclosure. Terms relating to circular shapes as used herein, such as diameter or radius, should be understood not to require perfect circular structures, but rather should be applied to any suitable structure with a cross-sectional region that can be measured from side-to-side. Terms relating to shapes generally, such as “circular,” “cylindrical,” “semi-circular,” or “semi-cylindrical” or any related or similar terms, are not required to conform strictly to the mathematical definitions of circles or cylinders or other structures, but can encompass structures that are reasonably close approximations.
Conditional language, such as “can,” “could,” “might,” or “may,” unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain examples include or do not include, certain features, elements, and/or steps. Thus, such conditional language is not generally intended to imply that features, elements, and/or steps are in any way required for one or more examples.
Conjunctive language, such as the phrase “at least one of X, Y, and Z,” unless specifically stated otherwise, is otherwise understood with the context as used in general to convey that an item, term, etc. may be either X, Y, or Z. Thus, such conjunctive language is not generally intended to imply that certain examples require the presence of at least one of X, at least one of Y, and at least one of Z.
The terms “approximately,” “about,” and “substantially” as used herein represent an amount close to the stated amount that still performs a desired function or achieves a desired result. For example, in some examples, as the context may dictate, the terms “approximately,” “about,” and “substantially,” may refer to an amount that is within less than or equal to 10% of the stated amount. The term “generally” as used herein represents a value, amount, or characteristic that predominantly includes or tends toward a particular value, amount, or characteristic. As an example, in certain examples, as the context may dictate, the term “generally parallel” can refer to something that departs from exactly parallel by less than or equal to 20 degrees. All ranges are inclusive of endpoints.
Several illustrative examples of Lapidus procedure systems and methods have been disclosed. Although this disclosure has been described in terms of certain illustrative examples and uses, other examples and other uses, including examples and uses which do not provide all of the features and advantages set forth herein, are also within the scope of this disclosure. Components, elements, features, acts, or steps can be arranged or performed differently than described and components, elements, features, acts, or steps can be combined, merged, added, or left out in various examples. All possible combinations and subcombinations of elements and components described herein are intended to be included in this disclosure. No single feature or group of features is necessary or indispensable.
Certain features that are described in this disclosure in the context of separate implementations can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation also can be implemented in multiple implementations separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations, one or more features from a claimed combination can in some cases be excised from the combination, and the combination may be claimed as a subcombination or variation of a sub combination.
Any portion of any of the steps, processes, structures, and/or devices disclosed or illustrated in one example in this disclosure can be combined or used with (or instead of) any other portion of any of the steps, processes, structures, and/or devices disclosed or illustrated in a different example or flowchart. The examples described herein are not intended to be discrete and separate from each other. Combinations, variations, and some implementations of the disclosed features are within the scope of this disclosure.
While operations may be depicted in the drawings or described in the specification in a particular order, such operations need not be performed in the particular order shown or in sequential order, or that all operations be performed, to achieve desirable results. Other operations that are not depicted or described can be incorporated in the example methods and processes. For example, one or more additional operations can be performed before, after, simultaneously, or between any of the described operations. Additionally, the operations may be rearranged or reordered in some implementations. Also, the separation of various components in the implementations described above should not be understood as requiring such separation in all implementations, and it should be understood that the described components and systems can generally be integrated together in a single product or packaged into multiple products. Additionally, some implementations are within the scope of this disclosure.
Further, while illustrative examples have been described, any examples having equivalent elements, modifications, omissions, and/or combinations are also within the scope of this disclosure. Moreover, although certain aspects, advantages, and novel features are described herein, not necessarily all such advantages may be achieved in accordance with any particular example. For example, some examples within the scope of this disclosure achieve one advantage, or a group of advantages, as taught herein without necessarily achieving other advantages taught or suggested herein. Further, some examples may achieve different advantages than those taught or suggested herein.
Some examples have been described in connection with the accompanying drawings. The figures are drawn and/or shown to scale, but such scale should not be limiting, since dimensions and proportions other than what are shown are contemplated and are within the scope of the disclosed invention. Distances, angles, etc. are merely illustrative and do not necessarily bear an exact relationship to actual dimensions and layout of the devices illustrated. Components can be added, removed, and/or rearranged. Further, the disclosure herein of any particular feature, aspect, method, property, characteristic, quality, attribute, element, or the like in connection with various examples can be used in all other examples set forth herein. Additionally, any methods described herein may be practiced using any device suitable for performing the recited steps.
For purposes of summarizing the disclosure, certain aspects, advantages and features of the inventions have been described herein. Not all, or any such advantages are necessarily achieved in accordance with any particular example of the inventions disclosed herein. No aspects of this disclosure are essential or indispensable. In many examples, the devices, systems, and methods may be configured differently than illustrated in the figures or description herein. For example, various functionalities provided by the illustrated modules can be combined, rearranged, added, or deleted. In some implementations, additional or different processors or modules may perform some or all of the functionalities described with reference to the examples described and illustrated in the figures. Many implementation variations are possible. Any of the features, structures, steps, or processes disclosed in this specification can be included in any example.
In summary, various examples of Lapidus procedure systems and related methods have been disclosed. This disclosure extends beyond the specifically disclosed examples to other alternative examples and/or other uses of the examples, as well as to certain modifications and equivalents thereof. Moreover, this disclosure expressly contemplates that various features and aspects of the disclosed examples can be combined with, or substituted for, one another. Accordingly, the scope of this disclosure should not be limited by the particular disclosed examples described above, but should be determined only by a fair reading of the claims.
While the above detailed description has shown, described, and pointed out novel features as applied to illustrative embodiments, it will be understood that various omissions, substitutions, and changes in the form and details of the devices or algorithms illustrated can be made without departing from the spirit of the disclosure. As will be recognized, certain embodiments described herein can be embodied within a form that does not provide all of the features and benefits set forth herein, as some features can be used or practiced separately from others. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
This is a continuation-in-part of U.S. patent application Ser. No. 17/305,644 filed Jul. 12, 2021, which is a divisional of U.S. patent application Ser. No. 16/938,375 filed Jul. 24, 2020 (issued as U.S. Pat. No. 11,058,546), which claims priority to U.S. Patent Application Ser. No. 62/879,340 filed Jul. 26, 2019, the disclosure of each of which is hereby incorporated by reference as if set forth in its entirety herein. This also claims priority to U.S. Patent Application Ser. No. 63/263,076 filed Oct. 26, 2021, the disclosure of which is hereby incorporated by reference as if set forth in its entirety herein.
| Number | Date | Country | |
|---|---|---|---|
| 62879340 | Jul 2019 | US | |
| 63263076 | Oct 2021 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 16938375 | Jul 2020 | US |
| Child | 17305644 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 17305644 | Jul 2021 | US |
| Child | 17938289 | US |
