External fixator system

Information

  • Patent Grant
  • 12035944
  • Patent Number
    12,035,944
  • Date Filed
    Wednesday, September 8, 2021
    3 years ago
  • Date Issued
    Tuesday, July 16, 2024
    4 months ago
Abstract
Disclosed herein are external fixation frames for correcting bone deformities. The external fixation frames include a top fixation ring and a bottom fixation ring coupled to one another by at least two struts. A half ring is coupled to bottom fixation ring. The bottom fixation ring is u-shaped. One or more rocker members may be coupled to the bottom fixation ring. The half ring may be hingedly coupled to the bottom fixation ring such that it can rotate with respect to the bottom fixation ring from a first position to a second position.
Description
FIELD OF THE INVENTION

The present disclosure relates to an external fixation frame for correcting a bone deformity. More particularly, the present disclosure relates to an external fixation frame having an arch or half-ring connected to a bottom fixation ring of the external fixation frame.


BACKGROUND OF THE INVENTION

Many different types of bone deformities can be corrected using external fixation systems to perform the distraction osteogenesis process. For example, an Ilizarov device or similar external fixation system may be used. Such systems generally use rings also designated as fixation plates connected by threaded rods or struts with nuts for manipulation, angulation, and translation of the length discrepancies of bones. The nuts that are used to adjust the length of the struts are generally manually adjusted by a surgeon or by the patient with a wrench or by hand to change the positions of the rings and/or percutaneous fixation components.


As the position adjustments of the components are made where the nuts are secured, it can be difficult for the patient, for example, to make the required daily adjustments with consideration of maintaining stable fixation. Other devices use different techniques to adjust the effective length of the struts or rods but all must be adjusted somewhere between the ends thereof. The devices generally offer limited access for the patient. Because the adjustments are often a daily task for the patient, easier access to the frame adjustment points would be a significant advantage.


Fixation systems, especially foot fixation systems, have many areas of needed improvement. For example, existing foot fixation products on the market are static and do not allow for adjustment and pivoting. Certain foot fixation systems include a solid and stationary half-ring assembled to the foot ring. This lack of flexibility and motion restricts the motion of the foot and ankle and the external fixation frame during deformity correction, making the process more difficult for the physician and the patient and potentially preventing an optimal clinical outcome.


To allow for deformity correction of the foot and ankle, an adjustable and pivoting component that can be assembled onto the distal portion of a foot ring of an external fixation frame is needed.


BRIEF SUMMARY OF THE INVENTION

In one embodiment, an external fixation frame for correcting a bone deformity includes a first and second fixation ring. A posterior adjustable length strut couples a posterior portion of the first fixation ring to a posterior portion of the second fixation ring, the posterior adjustable length strut including a universal joint at an end thereof. Medial and lateral adjustable length struts couple medial and lateral portions of the first fixation ring to medial and lateral portions of the second fixation ring, respectively. The medial and lateral adjustable length struts include a constrained hinge joint at ends thereof. A half ring is hingedly coupled to the second fixation ring and an anterior adjustable length strut couples an anterior portion of the first fixation ring to the half ring.


The half ring may include a lateral end potion, a medial end portion, and an arcuate body portion connecting the lateral end portion to the medial end portion. The medial end portion of the half ring includes a first constrained hinge joint and the lateral end portion of the half ring includes a second constrained hinge joint. The second fixation ring may be U-shaped and include a medial anterior projection, a lateral anterior projection, and a rounded posterior section connecting the medial anterior projection to the lateral anterior projection. The first constrained hinge joint may couple the medial end portion of the half ring to the medial anterior projection of the second fixation ring and the second constrained hinge joint may couple the lateral end portion of the half ring to the lateral anterior projection of the second fixation ring.


The anterior adjustable length strut may include a distal constrained hinge joint and a proximal universal hinge joint. The distal constrained hinge joint of the anterior adjustable length strut may be coupled to the arcuate body portion of the half ring and the proximal universal hinge joint of the anterior adjustable length strut may be coupled to the anterior portion of the first fixation ring. The medial adjustable length strut and lateral adjustable length strut may each include an aperture proximal of the constrained hinge joint, each aperture being configured to accept a wire fastener therethrough. The half ring may include an aperture with a diameter and the anterior adjustable length strut may include a connecting element at a distal end thereof. The connecting element may include internal threading on the distal end of the strut and an externally threaded bolt, a portion of the bolt having a diameter greater than the diameter of the half ring aperture.


The external fixation frame may also include a rocker member coupled to a bottom surface of the second fixation ring. The rocker member may include a curved body portion with at least one connecting element projecting proximally from the curved body portion and configured to mate with an aperture in the second fixation ring. The connecting element may include a main body portion extending through an aperture in the curved body portion of the rocker member and a distal flange. The distal flange may extend distally of the main portion and be configured to contact a corresponding shoulder portion of the aperture in the curved body portion. The rocker member may further include a ground-contacting rounded distal portion coupled to a distal portion of the curved body portion of the rocker member, the ground-contacting rounded distal portion having a textured ground-contacting surface.


In another embodiment, an external fixation frame for correcting a bone deformity may include a first and second fixation ring. The second fixation ring may have a first free end, a second free end, and an arcuate portion connecting the first free end to the second free end. At least four struts couple the first fixation ring to the second fixation ring. At least one bone fastener has a first end operably coupled to the first free end of the second fixation ring and a second end operably coupled to the second free end of the second fixation ring. A half ring has a first free end, a second free end, and an arcuate portion connecting the first free end to the second free end. The first free end of the half ring is coupled to the first free end of the second fixation ring and the second free end of the half ring is coupled to the second free end of the second fixation ring. The bone fastener may be a K-wire. The external fixation frame may also include a first compression module coupled to the first free end of the second fixation ring and a second compression module coupled to the second free end of the second fixation ring. The first end of the bone fastener may be coupled to the first compression module and the second end of the bone fastener may be coupled to the second compression module.





BRIEF DESCRIPTION OF THE DRAWINGS

Preferred embodiments of the invention are described in the following with reference to the drawings, which are for the purpose of illustrating the present preferred embodiments of the invention and not for the purpose of limiting the same.


A more complete appreciation of the subject matter of the present invention and the various advantages thereof can be realized by reference to the following detailed description in which reference is made to the accompanying drawings in which:



FIGS. 1A-C show side views of different strut configurations of an external fixator system of the present invention with first and second plates coupled to a tibia and a foot of a patient respectively;



FIG. 2 shows an embodiment of an actuation unit of the present invention used in the external fixator system of FIGS. 1A-C;



FIG. 3 shows a cross-sectional view of the actuation unit of FIG. 2;



FIG. 4 shows a perspective partial cross-sectional view of the actuation unit of FIG. 3;



FIG. 5 shows the actuation unit of the previous figures in connection with an adjustable length strut to be used to connect two rings of the external fixator with each other; and



FIG. 6 shows a detailed view of FIG. 5.



FIG. 7 shows a perspective view of an external fixation frame according to another embodiment of the invention.



FIG. 8A shows a front plan view of a half-ring of the external fixation frame shown in FIG. 7.



FIG. 8B shows a perspective view of the half-ring of FIG. 8A.



FIG. 8C shows a partial cross-sectional view of the half-ring of FIG. 8A.



FIGS. 9A-B show top plan views of a bottom fixation ring of the external fixation frame shown in FIG. 7.



FIG. 10A shows a perspective view of a rocker shoe of the external fixation frame shown in FIG. 7.



FIGS. 10B-D shows various plan views of the rocker shoe of FIG. 10A.



FIG. 10E shows an exploded view of the components of the rocker shoe of FIG. 10A.



FIG. 10F shows a perspective view of the rocker shoe of FIG. 10E.



FIG. 11A shows a perspective view of a universal hinge strut of the external fixation frame shown in FIG. 7.



FIGS. 11B-D show various plan views of the universal hinge strut shown in FIG. 11A.



FIG. 12A shows a perspective view of a constrained hinge strut of the external fixation frame shown in FIG. 7.



FIGS. 12B-D show various plan views of the constrained hinge strut shown in FIG. 12A.



FIGS. 13A-D show various views of a constrained hinge joint of the constrained hinge strut shown in FIGS. 12A-D.



FIG. 14A shows a perspective view of one embodiment of a half-ring strut of the external fixation frame shown in FIG. 7.



FIG. 14B shows a perspective view of another embodiment of a half-ring strut of the external fixation frame shown in FIG. 7.



FIGS. 14C-E show various plan views of the half-ring strut shown in FIG. 14B.



FIG. 14F shows an enlarged perspective partial view of a connecting element of the half-ring strut shown in FIGS. 14B-E.



FIG. 15 is a perspective view of an alternate embodiment of an external fixator system.



FIG. 16 is a perspective view of the bottom fixation ring and compression modules of the external fixator system of FIG. 15.





DETAILED DESCRIPTION

As used herein, the term “proximal” means a direction closer to the heart of a patient and the term “distal” means a direction farther away from the heart of a patient. The term “anterior” means towards the front part of the body or the face and the term “posterior” means towards the back of the body. The term “medial” means toward the midline of the body and the term “lateral” means away from the midline of the body.


Referring to FIGS. 1-6, there is shown an embodiment of an external fixator system of the present invention. As shown in those figures, the external fixator system includes first and second fixation plates 1, 2 coupled to first and second bone segments L, F respectively, a plurality of adjustable length struts 3, at least one actuation unit 4, and a plurality of clamping units 4′.



FIGS. 1A-E show an exemplary embodiment of an external fixator system. The external fixator system comprises at least two fixation plates 1, 2 which are arranged at a distance to each other and at least one adjustable length strut 3 which is in connection with the fixation plates 1, 2. Such struts are shown in U.S. Publications 200910198234 and 200910198235 the disclosures of which are incorporated herein by reference in their entirety. Fixation plates 1, 2 serve as bearing elements for pins which are in connection with bony structure such as first and second bone segments L, F, for example. The orientation as well as the distance between two fixation plates 1, 2 thereby define the orientation and distance between fractured elements of the bony structure. Each of the fixation plates 1, 2 comprises a front surface 12 which extends over the largest dimension of the plate 1, 2.


In the present embodiment there is an upper fixation plate 1 in connection with the lower leg L and a lower fixation plate 2 in connection with the foot F. The lower fixation plate 2 comprises also a rolling structure 20 to enable a user to walk around.


Adjustable length struts 3 each include a length adjusting mechanism 32 having a threaded strut 33 and a non-rotating strut 34 having an internal thread along at least a portion of a length thereof in which the threaded strut 33 engages. Struts 3 include a first end region 30 and a second end region 31 in which the struts 3 are coupled to the respective fixation plates. In the present embodiment the struts 3 are connected to the upper fixation plate 1 by means of an actuation unit 4 and to the lower fixation plate 2 by means of a clamping element 4′. It is also possible to use an actuation unit 4 to connect the strut 3 to the upper fixation plate 1 as well as to the lower fixation plate 2. The actuation unit 4 is preferably provided to actuate the length-adjusting strut in order to adjust its length.


The actuation unit 4 is preferably in a fixed connection with fixation plates 1, 2 as shown in FIGS. 1A-E. The term fixed connection is to be understood as being a connection which prevents unintentional relative motion between the actuation unit 4 and fixation plates 1, 2. In particular, a rotational motion is preferably prevented. Preferably, fixation plates 1, 2 comprise a plurality of openings 10 in which such actuation units 4 can be arranged and such that the fixed connection can be established. The fixed connection has the advantage such that the device can be adjusted easily without the aid of several tools.



FIG. 2 shows the actuation unit 4 in a perspective view and FIGS. 3 and 4 show sectional views. The actuation unit 4 comprises an outer sleeve 5 in which an actuation element 6 is arranged. The actuation unit 4 is in connection with the fixation plate 1, 2 by means of the outer sleeve 5. Outer sleeve 5 is shown having a partly round configuration but may have other configurations such as rectangular, spherical, square and the like.


The outer sleeve 5 extends along a middle axis M as shown in FIG. 3 and comprises a through opening 50, a clamping section 51 and a bearing section 52. The clamping section 51 includes a threaded section 53 and a shaft section 54. The threaded section is in contact with a nut 56 which is used to secure the outer sleeve 5 to the fixation plate 1, 2. On the outer side a flange 55 divides the clamping section 51 from the bearing section 52. The bearing section 52 has mainly two purposes, namely to bear the actuation element and to provide a bearing of the outer sleeve 5 in the opening 10. Hence the inner side provided by said through opening 50 serves to provide a bearing for an actuation element 6 of actuation unit 4. The outer side of the bearing section 52 serves mainly to provide a bearing for the outer sleeve 5 within said opening 10 in the ring 1 as explained below with regard to FIG. 3 in more detail. The outer side of the bearing section 52 has in the present embodiment a rectangular cross section with rounded edges 57 and flat sidewalls 58. Edges 57 and sidewalls 58 extend parallel to the middle axis M. The part which is located in vicinity of flange 55, however, is preferably also in connection with the opening in the fixation plate 1, 2.


In FIG. 3, one embodiment of an opening 10 in the fixation plate 1, 2 is schematically shown. The opening 10 comprises a shoulder 11 which subdivides the opening 10. The opening 10 comprises a first section 13 and a second section 14. The shoulder 11 is located between the first section 13 and the second section 14. The first section 13 of the opening 10 has therefore a complementary or corresponding shape as the shaft section 54. In the present embodiment shaft section 54 as well as first section 13 have circular cross-sections and the second section 14 as well as the bearing section 52 have a rectangular cross-section.


When the outer sleeve 5 is inserted into the opening 10 the shoulder 11 is preferably in contact with flange 55. The shaft section 54 of the outer sleeve 5 extends through the first section 13 of the opening 10 and the bearing section 52 extends into the section 14. The outer sleeve 5 is fixed to the fixation plate 1, 2 by means of nut 56 which retracts the outer sleeve 55 relative to fixation plate 1, 2 such that flange 55 comes in contact with the shoulder 11.


From FIG. 2 it becomes evident that the cross-section of the outer surface of the bearing section 52 which is in contact with the opening 10 is provided such that rotation of outer sleeve 5 relative to the fixation plate 1, 2 is prevented. For that reason the opening 10 has a complementary shape. In the present embodiment, the outer sleeve 5 has partly a rectangular cross-section with rounded edges. Here the rectangular cross-section is mainly provided by the outer side of the bearing section 52 or the outer surfaces of the bearing section 52, respectively.


The actuation element 6 of actuation unit 4 preferably extends along the middle axis M and comprises mainly a shaft section 60 which extends through the opening 50 of the outer sleeve and a connection section 61 which is in connection with strut 3. The actuation element 6 can be actuated, i.e. rotated, by means of a tool 67 shown in FIG. 5, which preferably engages in a socket 66 of the actuation element 6. Socket 66 is thereby arranged such that the tool can be introduced in a direction which is more or less in line with the axis of the strut or in a direction perpendicular to the fixation plate 1, 2 in particular to surface 12. The orientation of the socket 66 has thereby the advantage that easy access is provided from the top of the fixation system and that the length of the struts 3 can be adjusted easily by any user of the system.


The actuation element 6 is borne by means of a ball bearing 9 in the outer sleeve 5. In the present embodiment, the ball bearing 9 is provided by means of the shaft section 61 and the bearing section 52. A separate ball bearing is also possible, but a ball bearing which is provided according to the embodiment of FIG. 3 is preferably compact in terms of size.


As shown in FIG. 3, the bearing section 52 and the shaft section 61 preferably comprise respective grooves 90, 91 in which a plurality of balls 92 are arranged. Groove 90 extends into the surface of the opening 50 and encompasses the whole opening 50, whereas groove 91 is arranged in the shaft 61 of the actuation element 6. The grooves 90, 91 provide a channel in which the balls 92 are arranged. Balls 92 may be introduced into the channel via an opening 93 in the shaft section 61 which is covered by means of a cover 94.


Between the outer sleeve 5 and the actuation element 6 there is arranged a feedback unit 7 as shown in FIGS. 3 and 4. In the present embodiment, the feedback unit 7 is provided by means of a spring-loaded ball 70 and corresponding chambers 71. The spring-loaded ball 70 is arranged in an opening 72 in the actuation element 6. Between the ground of the opening 72 and the spring-loaded ball 70 there is arranged a spring 73 which provides a force that pushes the ball 70 into a respective chamber 71. The chambers 71 are arranged in the surface of the through opening 50 in the outer sleeve 5. Upon rotation of the actuation element 6 relative to the outer sleeve 5, the spring-loaded ball 70 is pushed against the spring force by means of the transition portion 74 between two neighboring chambers 71. As soon as the next chamber 71 is in line with the spring axis, the spring-loaded ball 70 will be moved into the respective chamber 71. This mechanism results in a clicking noise which provides the user with a respective audible feedback about the amount of actuation that is being made.


There are a plurality of chambers 71 arranged which are preferably distributed evenly around the perimeter of the through opening 50 of the outer sleeve 5. In the present embodiment, eight chambers 71 are arranged such that each chamber is located approximately 45° from a neighboring chamber, but it is also possible to arrange more or less than eight chambers. The number of chambers preferably depends on the application. Preferably, each time the actuation element is rotated such that the spring-loaded ball moves from one chamber 71 and into a neighboring chamber 71, adjustable length strut is lengthened 1 mm Each time the actuation element is rotated such that the spring-loaded ball moves from one chamber 71 and into a neighboring chamber 71, adjustable length strut may be lengthened between 0.1 mm to 1 mm.


It is important for the adjustable length strut to not be lengthened so easily or inadvertently such that accidental injury may be caused. Osteogenesis generally occurs over a considerable length of time and lengthening and/or angulation adjustment between adjacent bone fragments should only be done in a prescribed manner Therefore, chambers 71 are preferably deep enough to securedly house at least a portion of the spring loaded ball 70 and a spring constant k of the spring is sufficient enough to force the ball against side walls in the respective chambers such that preferably only intended actuation of the actuation unit causes the actuation unit to actuate.


With regard to the embodiment as shown in FIGS. 3 and 4, opening 72 can also be arranged in the outer sleeve 5 and that the chambers 71 can also be arranged in the actuation element 6. With such a configuration a same or similar result can preferably be achieved.


The strut 3 with its end region is in a fixed connection with the actuation element 6. In the present embodiment, there is a Cardan (universal) joint 62 arranged between the strut 3 and the actuation element 6 in order to compensate angular differences between the strut 3 and the actuation element 6. Furthermore the actuation element 6 comprises an opening 63 in which the strut 3 extends as shown in FIG. 6. Preferably the strut 3 is in connection with the opening 63 by means of a thread, a press fit or any other suitable connection method which prevents a relative movement between the strut 3 and the actuation element 6. In case a thread is used, it is advantageous to secure the thread by means of a pin 64 which extends through the opening 63 and the strut 3. For that reason a pin opening 65 is arranged in the region of the opening 63. The use of a Cardan joint 62 has the advantage that adjustments can be made in advantageous manner, namely in a preferably precise and smooth manner.


Upon rotation of the actuation element 6, the strut will also be rotated and its length will be adjusted according to the degree of rotation. The feedback unit 7 then provides the user with an acoustic as well as with a haptic feedback due to its mechanical structure as outlined above.


Upon rotation of the actuation element 6, the strut will also be rotated and its length will be adjusted according to the degree of rotation. The feedback unit 7 then provides the user with an acoustic as well as with a haptic feedback due to its mechanical structure as outlined above.


The arrangement of the feedback unit 7 as mentioned herein has the advantage that in terms of dimension a very compact structure can be achieved. Thereby the overall weight can be significantly reduced and it is preferably more convenient for the patient to use such a structure.


As shown in FIG. 2, markings 67 showing the direction of rotation are arranged on an outer face of actuation unit 4 in order to allow the user to know in which direction actuation unit 4 is being actuated. In this region it is also possible to arrange a scale on which the user can visually recognize the amount of rotation, whereby a visual feedback can be provided.



FIGS. 5 and 6 show the strut 3 in connection with actuation unit 4 by way of its first end region 31 and with the clamping element 4′ via its second end region 32. The clamping element 4′ clamps the strut 3 in fixed manner to the fixation plate 1, 2 which is not shown here. The actuation unit 4 is also in a fixed connection with the respective fixation plate, but the actuation element 6 which is arranged within the actuation unit 4 is rotatable relative to the actuation unit 4. A rotation of the actuation element 6 preferably results in a rotation of the threaded strut 33 and in connection with the non-rotating strut section 34 such that the length of the strut 3 will be adjusted.



FIG. 7 illustrates a perspective view an embodiment of an external fixator similar to that illustrated in FIGS. 1A-C. Similar parts are generally identified by a number 100 greater than the corresponding part identified in FIGS. 1A-C. FIG. 7 particularly illustrates a half-ring 113 hingedly coupled to the bottom fixation ring 102 and coupled to the top fixation ring 101 via half-ring strut 103c. Although the term half-ring is used, it should be understood that the half-ring is not limited to being half of a circular ring, but may take other shapes, preferably generally arcuate shapes. The top fixation ring 101 is further connected to the bottom fixation ring 102 with constrained hinge struts 103b and a universal hinge strut 103a.


As illustrated in FIG. 7, the half-ring 113 is coupled to the anterior part of the bottom fixation ring 102. Among other benefits, the half-ring 113 closes the open bottom fixation ring 102 such that the open bottom fixation ring does not deflect, or only minimally deflects, when fixation features, such as Kirschner wires (“K-wires”) 114 are tensioned. Without half-ring 113, tensioning a member fixed at opposite ends of the open bottom fixation ring 102, such as a K-wire 114, may tend to cause the open portions of bottom fixation ring to deflect closer together. This deflection is limited by the rigid connection of the half-ring 113 to the bottom fixation ring 102.


The half-ring 113 is best illustrated in FIGS. 8A-C. The half-ring 113 may include a generally arcuate main portion 1300 similar to a portion of one of the fixation rings 101, 102. Similar to the fixation rings 101, 102, the half-ring 113 may include a number of openings 1310 to facilitate other members, such as half-ring strut 103c, to be attached to the half-ring.


The half-ring 113 may also include hinges 1320 at the ends of the main portion 1300. The hinges 1320 may include a first hinge portion 1322 and a second hinge portion 1324. The first hinge portion 1322 may be coupled to the half-ring 113, for example by an adhesive, or may alternately be integral with the half-ring. As illustrated in FIG. 8C, the first hinge portion 1322 may include a pronged connecting portion 1323 that mates with recesses in an end of the main portion 1300 of the half-ring 113. The fit may be a compression fit or a snap fit, or may otherwise be fixed, for example by an adhesive.


The first hinge portion 1322 may also include a textured surface and an aperture to accept a fastener. The aperture preferably is unthreaded. The fastener may be, for example, a screw 1326 with a first portion of the screw shaft unthreaded and a second portion of the screw shaft threaded. The second hinge portion 1324 may be of a generally similar structure to the first hinge portion 1322, having a textured surface and an aperture to accept a fastener. Preferably, the aperture is internally threaded.


The second hinge portion 1324 may also include a connecting portion 1325. The connecting portion 1325 may, for example, be cylindrical and configured to pass through an aperture 10 in the bottom fixation ring 2. The connecting portion 1325 may also be threaded to mate with a locking nut or other fastener to secure the second hinge portion 1324 in a fixed relation to the bottom fixation ring 2.


The screw 1326 may be inserted through the unthreaded aperture in the first hinge portion. Preferably the unthreaded aperture is large enough that the shaft of the screw 1326 can move freely through the aperture. The threaded portion of the screw 1326 is then inserted through the threaded aperture in the second hinge portion 1324. The threaded aperture is preferably dimensioned such that the screw 1326 must be rotated to pass through the threaded aperture. As the screw 1326 is rotated, the second hinge portion 1324 is drawn toward the first hinge portion 1322. When fully inserted, the unthreaded portion of the screw 1326 generally is located at the unthreaded aperture of the first hinge portion 1322 and the threaded portion of the screw is engaged with the threaded aperture of the second hinge portion 1324. In this position, the first hinge portion 1322 and second hinge portion 1324 are frictionally engaged such that rotation of the first hinge portion relative to the second hinge portion about the screw 1326 is resisted. In the embodiment in which one or both of the hinge portions 1322, 1324 include textured surfaces, such as ridges, the engagement of the textured surfaces may provide additional resistance against rotation. A nut may also be threaded onto any portion of the screw 1326 that extends beyond the aperture in the second hinge portion 1324 to help prevent unintentional rotation of the screw 1326 when in the fully threaded, locked position.


The bottom fixation ring 102 is illustrated in FIGS. 9A-B. The bottom fixation ring 102, in the particular embodiment shown, is generally “U” shaped with a posterior base 1020 and anterior projections 1022. The bottom fixation ring 102 may include a number of apertures or openings 1024 extending along the length of the bottom fixation ring. Although one particular pattern of openings 1024 is illustrated in FIG. 9, the number and placement of the openings 1024 is largely a matter of design choice. The openings 1024 may be used to connect components to the bottom fixation ring 102, such as a variety of struts and compression modules, as is explained in further detail below. Preferably, enough openings 1024 exist such that a surgeon or other user has a variety of choices in the placement of such components.


Rolling structure, or rocker 120, is illustrated in FIGS. 10A-F. Generally, rocker 120 has an elongate main body 1200 and an elongate ground-contacting rounded portion 1201. The ground-contacting rounded portion 1201 may include treads or other surface texture to increase friction with the ground. The ground-contacting rounded portion 1201 may be integral with the main body 1200, or may be otherwise coupled to the main body, for example by adhesive. The main body and ground-contacting rounded portion may include openings 1202 and 1203, respectively.


The main body 1200 of the rocker 120 may include one or more connecting pins 1205 (three connecting pins illustrated in FIGS. 10A and 10E-F, two connecting pins illustrated in FIGS. 10B-D). As best illustrated in FIG. 10B, the connecting pins 1205 may be generally cylindrical and dimensioned to securedly fit within an opening 1202 of the main body 1200. The bottom of the connecting pins 1205 may include a flange 1206 larger than the diameter of the opening 1202, such that the connecting pins 1205 cannot be pulled proximally through the rocker 120. A recess 1207 may be formed on a distal end of the main body 1200 where each connecting pin 1205 is located. The recess 1207 is formed such that the flange 1206 of the connecting pin 1205 is situated distal to the main body 1200 and proximal to the ground-contacting rounded portion 1201 of the rocker 120. The distal end of the connecting pins 1205 may be threaded and configured to fit through openings 1024 of the bottom fixation ring 102 to secure the rocker 120 to the bottom fixation ring. The distal end of the connecting pins 1205 may be threaded to accept a locking nut 1208 to lock the rocker 120 to the bottom fixation ring 102.


Although only one rocker 120 is illustrated in FIGS. 10A-F, it should be understood that two rockers would be used with the bottom fixation ring 102 to provide stable contact with the ground. Also, the rockers 120 may be identical, or may be similarly or symmetrically shaped. For example, as seen in FIG. 10D, the rocker 120 may include contours, which contours may be mirrored in a second rocker that is used with the bottom fixation ring.


As discussed above, multiple struts may be used to connect components of the fixation system and to allow for various types of movement and positioning between the components. In the illustrated embodiment, at least three different types of struts are used, including universal hinge struts 103a, constrained hinge struts 103b and half-ring struts 103c.


Now referring to FIGS. 11A-D, universal hinge strut 103a may be similar to the adjustable length strut 3 described above. In one embodiment, universal hinge strut 103a includes a length adjusting mechanism having a threaded strut 133a and a non-rotating strut 134a having an internal thread along at least a portion of a length thereof in which the threaded strut 133a engages. Universal hinge struts 103a may be connected to the upper fixation plate 101 by means of an actuation unit 104a and to the lower fixation plate 102 by means of a connecting element 104a′. It is also possible to use an actuation unit 104a to connect the universal hinge strut 103a to the upper fixation plate 101 as well as to the lower fixation plate 102. The actuation unit 104a is preferably provided to actuate the length-adjusting strut in order to adjust its length.


The actuation unit 104a may be substantially similar to the actuation unit 4 described above, including a ball and spring mechanism to provide auditory and/or tactile feedback. In the illustrated embodiment, universal hinge strut 103a includes a universal joint 162a near the connecting element 104a′. This is in contrast to the strut 3 described above, in which the universal joint 62 is positioned closer to the actuation element 4. The internal mechanisms described with relation to strut 3, however, generally apply with equal force to the universal hinge strut 103a. The universal hinge strut 103a may also include a quick-release mechanism 135a. Generally, the quick-release mechanism 135a has a locked position and an unlocked position. In the locked position, the threaded strut 133a can move into or out of the non-rotating strut 134a only by rotation of the threaded strut into the non-rotating strut. In the unlocked position, the threaded strut 133a may be moved into or out of the non-rotating strut 134a without rotation of the threaded strut, such that a user may quickly move the threaded strut into the non-rotating strut. This mechanism is more fully described in U.S. patent application Ser. No. 13/592,832, titled “Bone Transport External Fixation Frame.”


Now referring to FIGS. 12A-D, constrained hinge struts 103b are nearly identical to universal hinge struts 103a, with a constrained hinge joint 168 rather than a universal hinge joint 162. The constrained hinge joints 168 allow for constrained rotation using a similar or identical mechanism as hinges 1320 of the half-ring 113. Similar to the universal hinge strut 103a, constrained hinge strut 103b includes a length adjusting mechanism having a threaded strut 133b and a non-rotating strut 134b having an internal thread along at least a portion of a length thereof in which the threaded strut 133b engages. Constrained hinge struts 103b may be connected to the upper fixation plate 101 by means of an actuation unit 104b and to the lower fixation plate 102 by means of a connecting element 104b′. It is also possible to use an actuation unit 104b to connect the constrained hinge strut 103b to the upper fixation plate 101 as well as to the lower fixation plate 102. The actuation unit 104b is preferably provided to actuate the length-adjusting strut in order to adjust its length.


The actuation unit 104b may be substantially similar to the actuation unit 4 described above, including a ball and spring mechanism to provide auditory and/or tactile feedback. In the illustrated embodiment, constrained hinge strut 103b includes a constrained joint 168b near the connecting element 104b′. The constrained hinge strut 103b may also include a quick-release mechanism 135b.


Constrained hinge joint 168 is shown in more detail in FIGS. 13A-D. The constrained hinge joint 168 may include a first hinge portion 1422 and a second hinge portion 1424. The first hinge portion 1422 may be coupled to non-rotating strut 134b. The second hinge portion 1424 may be coupled to the connecting portion 104b′.


The first hinge portion 1422 may also include a textured surface and an aperture to accept a fastener. The aperture preferably is unthreaded. The fastener may be, for example, a screw 1426 with a first portion of the screw shaft unthreaded and a second portion of the screw shaft threaded. The second hinge portion 1424 may be of a generally similar structure to the first hinge portion 1422, having a textured surface and an aperture to accept a fastener. Preferably, the aperture is internally threaded.


The screw 1426 may be inserted through the unthreaded aperture in the first hinge portion. Preferably the unthreaded aperture is large enough that the shaft of the screw 1426 can move freely through the aperture. The threaded portion of the screw 1426 is then inserted through the threaded aperture in the second hinge portion 1424. The threaded aperture is preferably dimensioned such that the screw 1426 must be rotated to pass through the threaded aperture. As the screw 1426 is rotated, the second hinge portion 1424 is drawn toward the first hinge portion 1422. When fully inserted, the unthreaded portion of the screw 1426 generally is located at the unthreaded aperture of the first hinge portion 1422 and the threaded portion of the screw is engaged with the threaded aperture of the second hinge portion 1424. In this position, the first hinge portion 1422 and second hinge portion 1424 are frictionally engaged such that rotation of the first hinge portion relative to the second hinge portion about the screw 1426 is resisted. In the embodiment in which one or both of the hinge portions 1422, 1424 include textured surfaces, such as ridges, the engagement of the textured surfaces may provide additional resistance against rotation. A nut may also be threaded onto any portion of the screw 1426 that extends beyond the aperture in the second hinge portion 1424 to help prevent unintentional rotation of the screw 1426 when in the fully threaded, locked position.


The constrained hinge strut 103b may also include an aperture 169b. The aperture 169b accepts a K-wire or other bone fastener that travels into the bone. The connection of the K-wire with the bone and the aperture 169b of the constrained hinge strut 103b lines the axis of the constrained hinge joint 168b with the anatomic joint axis.


Now referring back to FIG. 12C, in one embodiment, constrained hinge joint 168b is removably attached to non-rotating strut 134b by connection mechanism 199. Connection mechanism 199 may take any suitable form, such as a pin inserted through apertures, mating threads, snap fitting, press fitting, etc. In this embodiment, the particular joint, in this case a constrained hinge joint 168b, may be removed and replaced with a different type of joint, such as a universal hinge joint, polyaxial joint, or otherwise, depending on the particular requirement or desire. This interchangeability allows, for example, a less complex process if a user desires to change the way in which a particular strut is capable of moving.


Now referring to FIG. 14A, half-ring strut 103c is illustrated. Half-ring strut 103c is substantially similar to universal hinge strut 103a and constrained hinge strut 103b, but includes both a universal joint 162c and a constrained joint 168c. The half-ring strut 103c may be used to fix upper fixation ring 101 to half-ring 113.


Half-ring strut 103c includes a length adjusting mechanism having a threaded strut 133c and a non-rotating strut 134c having an internal thread along at least a portion of a length thereof in which the threaded strut 133c engages. Half-ring strut 103c may be connected to the upper fixation plate 101 by means of an actuation unit 104c and to the half ring 113 by means of a connecting element 104c′. The actuation unit 104c is preferably provided to actuate the length-adjusting strut in order to adjust its length.


The actuation unit 104c may be substantially similar to the actuation unit 4 described above, including a ball and spring mechanism to provide auditory and/or tactile feedback. In the illustrated embodiment, half-ring strut 103c includes a constrained 168c near the connecting element 104c′ and a universal joint 162c near the actuation unit 104c. The half-ring strut 103c may also include a quick-release mechanism 135c.


A similar embodiment of half-ring strut 103c is illustrated in FIGS. 14B-E, which also includes a scale 136c on the non-rotating strut 134c. The scale 136c includes indicia along a slot, the slot allowing a user to visualize how far the threaded strut 133c has advanced into the non-rotating strut 134c.



FIG. 14F illustrates an enlarged view of the connecting element 104c′ of the half-ring strut 103c. In the illustrated embodiment, the connecting element 104c′ is bolt with external threading that mates with internal threading in a portion of the constrained joint 168c. The bolt includes a portion with a diameter larger than the diameter of a corresponding aperture in a fixation element, such as the half-ring 113. This connection may be accomplished by other mechanisms, for example using an internally threaded nut that threads onto the end of half-ring strut 103c. These mechanisms may apply with equal force to the other struts described herein.


In one embodiment of the fixation device, one universal hinge strut 103a fixes the top fixation plate 101 to the bottom fixation plate 102 at a posterior side of the device. Two constrained hinge joints 103b fix the top fixation plate 101 to the bottom fixation plate 102 at the medial and lateral sides of the device. A half-ring 113 is fixed at the anterior end of the bottom fixation plate 102, and a half-ring strut 103c fixes the half-ring 113 to an anterior portion of the top fixation plate 101. Each of the struts 103a-c may be increased or decreased in length as described above. The universal hinge strut 103a allows for top fixation ring 101 to move relative to the bottom fixation ring 102 with rotation about three axes. The constrained hinge strut 103b allows for the top fixation ring 101 to move relative to the bottom fixation ring 102 with rotation about a single axis. The half-ring 113 is constrained to rotation about one axis of rotation due to the hinges 1320 connecting the half-ring to the bottom fixation ring 102. The axis about which the half-ring rotates may be an axis that extends through the center of hinges 1320. The half-ring strut 103c allows the top fixation ring 101 to be rotated about three axes with respect to the half-ring 113, due to the universal joint 168c of the half-ring strut. This configuration allows the half-ring 113 to be assembled in multiple locations and positions on the distal portion of the foot ring, the half-ring having a lockable hinge. The combination of the features above allows for increased control of the foot and ankle in order to properly return it to an anatomic and functional position. The device also limits and/or avoids the possibility of changing of motor struts during treatment. In addition, the half-ring 113 provides added strength to the frame itself, as described above, by bridging the two free ends of the bottom fixation ring 102.


Now referring to FIG. 15, another embodiment of a foot fixation frame is illustrated. The illustrated embodiment is a static frame, using the same top and bottom fixation rings 101, 102 and half-ring strut 113 and rocker 120 as described previously. This embodiment, however, includes a different configuration of struts. Specifically, four or more struts 103d connect the top fixation ring 101 to the bottom fixation ring 102. By using four or more struts 103d, the rings 101 and 102 are over constrained and do not change positions relative to one another. As such, the struts 103d may be static struts. The struts 103d may also be any of those described previously, but kept in a locked position during the deformity correction. For example, a strut capable of polyaxial movement may be used for struts 103d. The strut may be angled initially when fixing top fixation ring 101 to bottom fixation ring 102 to provide for correct positioning, and then locked such that the strut 103d resists any additional repositioning.


The bottom fixation ring 102 may also include one or more foot compression modules 200, as illustrated in FIG. 15. Generally, the foot compression modules 200 are connected to the bottom fixation ring 102 and half pins or wires (e.g. K-wires 114) extend from a first compression module 200, through (or into) the foot F, and are fixed on the other side to the bottom fixation ring 102 or a second compression module 200. These compression modules 200 allow for controlled manipulation of the k-wires 114, and thus the bone fragments, during the deformity correction process. Compression modules are more fully described in U.S. Patent Publication No. 2011/0082458 and U.S. patent application Ser. No. 13/788,466 filed to Crozet et al., filed Mar. 7, 2013, and titled “Dynamic External Fixator and Methods for Use.” The entire content of each of these applications is hereby incorporated by reference herein. As discussed above, when tensioning the K-wires 114, using the compression modules 200 or otherwise, the projecting ends of the bottom fixation ring 102 tend to deform because of the applied force and further because of the open shape of the bottom fixation ring. The inclusion of the half-ring 113, connected in the same way as described above, resists deformation during tensioning of K-wires 114.


Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. For examples, components of one embodiment described herein may be combined with components of another embodiment described herein without departing from the scope of the invention.

Claims
  • 1. An external fixation frame system for correcting a bone deformity, comprising: a circular ring having a medial portion and a lateral portion;a U-shaped fixation ring including a medial portion, a lateral portion, and a rounded posterior section connecting the medial and lateral portions of the U-shaped fixation ring;a first strut;a second strut;a half ring having a first free end, a second free end, and a transition portion extending between the first free end and the second free end;a half-ring fixation strut;a first ground-contacting support having a first threaded connector extending proximally therefrom, and a first tread on a bottom surface thereof; anda second ground-contacting support separate from the first ground-contacting support, the second ground-contacting support having a second threaded connector extending proximally therefrom, and a second tread on a bottom surface thereof;wherein in an assembled condition of the external fixation frame system, (1) the first strut extends through corresponding first through-holes in the medial portions of the circular ring and the U-shaped fixation ring, (2) the second strut extends through corresponding second through-holes in the lateral portions of the circular ring and the U-shaped fixation ring; (3) the first and second free ends of the half ring are coupled, respectively, to the medial and lateral portions of the U-shaped fixation ring; (4) the half-ring fixation strut connects the half-ring to the circular ring; (5) the first threaded connector extends through a third through-hole in the lateral portion of the U-shaped fixation ring and a first locking nut engages the first threaded connector to couple the first ground-contacting support to the U-shaped fixation ring, and (6) the second threaded connector extends through a fourth through-hole in the medial portion of the U-shaped fixation ring and a second locking nut engages the second threaded connector to couple the second ground-contacting support to the U-shaped fixation ring.
  • 2. The external fixation frame system of claim 1, wherein in the assembled condition of the fixation frame system, the first free end of the half ring is coupled to a terminal end of the medial portion of the U-shaped fixation ring.
  • 3. The external fixation frame system of claim 2, wherein in the assembled condition of the fixation frame system, the second free end of the half ring is coupled to a terminal end of the lateral portion of the U-shaped fixation ring.
  • 4. The external fixation frame system of claim 1, wherein the half ring includes a plurality of through-holes extending therethrough.
  • 5. The external fixation frame system of claim 4, wherein in the assembled condition of the fixation frame system, a first end of the half-ring fixation strut is coupled to the half ring via one of the plurality of through-holes extending through the half ring, and a second end of the half-ring fixation strut is coupled to the circular ring via a fifth through-hole in the circular ring.
  • 6. The external fixation frame system of claim 5, wherein the half-ring fixation strut is a telescopic strut.
  • 7. The external fixation frame system of claim 6, wherein the first end of the half-ring fixation strut includes a constrained hinge joint.
  • 8. The external fixation frame system of claim 7, wherein the second end of the half-ring fixation strut includes a universal joint.
  • 9. The external fixation frame system of claim 1, wherein the first strut and the second strut each include a threaded rod.
  • 10. The external fixation frame system of claim 9, wherein the first strut and the second strut are each telescopic struts that include a cylindrical body portion coupled to the U-shaped fixation ring, each of the cylindrical body portions receiving the corresponding threaded rod coaxially therein.
  • 11. The external fixation frame system of claim 1, further comprising a third strut, the third strut being telescopically adjustable and including a cylindrical body portion and a threaded rod portion, the threaded rod portion adapted to translate into and out of the cylindrical body.
  • 12. The external fixation frame system of claim 11, wherein the third strut includes a quick-release mechanism having a locked position and an unlocked position, the threaded rod being translatable into the cylindrical body by rotation when the quick-release mechanism is in the locked position, and the threaded rod being translatable into the cylindrical body without rotation when the quick-release mechanism is in the unlocked position.
  • 13. The external fixation frame system of claim 1, wherein the half ring has a shape of a half-circle.
  • 14. The external fixation frame system of claim 1, further comprising a third strut, wherein in the assembled condition of the external fixation frame system, the third strut extends through corresponding fifth through-holes in a posterior portion of the circular fixation ring and the rounded posterior section of the U-shaped fixation ring.
  • 15. The external fixation frame system of claim 14, wherein the third strut includes a threaded rod.
  • 16. The external fixation frame system of claim 15, wherein in the assembled condition of the external fixation frame system, exactly three struts directly couple the circular ring to the U-shaped fixation ring, the three struts being the first strut, the second strut, and the third strut.
  • 17. The external fixation frame system of claim 1, wherein in the assembled condition of the external fixation frame system, the half ring is hingedly coupled to the U-shaped fixation ring.
  • 18. The external fixation frame system of claim 1, wherein in the assembled condition of the external fixation frame system, the half-ring fixation strut couples the transition portion of the half ring to an anterior portion of the circular ring.
  • 19. The external fixation frame system of claim 1, wherein in the assembled condition of the external fixation frame system, the first ground-contacting support is positioned directly inferior to the lateral portion of the U-shaped fixation ring and the second ground-contacting support is positioned directly inferior to the medial portion of the U-shaped fixation ring so that a user's foot may be positioned between the first and second ground-contacting supports.
  • 20. The external fixation frame system of claim 19, wherein in the assembled condition of the external fixation frame system, the first ground-contacting support is symmetrical with the second ground-contacting support about a line extending between and parallel to the medial portion and the lateral anterior portion.
Priority Claims (2)
Number Date Country Kind
10172523 Aug 2010 EP regional
11176512 Aug 2011 EP regional
CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of U.S. patent application Ser. No. 16/429,502, filed Jun. 3, 2019, which is a continuation of U.S. Pat. No. 10,376,285, filed Aug. 22, 2018, which is a continuation of U.S. Pat. No. 10,080,585, filed Jun. 28, 2017, which is a continuation of U.S. Pat. No. 9,839,445, filed Apr. 12, 2017, which is a continuation of U.S. Pat. No. 9,730,730, filed May 8, 2015, which is a continuation of U.S. Pat. No. 9,220,533, filed Dec. 9, 2014, which is a continuation of U.S. Pat. No. 8,945,128, filed Mar. 11, 2013, which is a continuation-in-part of U.S. Pat. No. 8,834,467, filed Aug. 9, 2011, which claims priority to European Application No. 10 172 523.2, filed Aug. 11, 2010, and European Application No. 11 176 512.9, filed Aug. 4, 2011. The disclosures of each of the above-referenced applications are hereby incorporated by reference herein.

US Referenced Citations (322)
Number Name Date Kind
6214 Yerger Mar 1849 A
2035952 Ettinger Mar 1936 A
2055024 Bittner Sep 1936 A
2291747 Neuwirth Aug 1942 A
2333033 Mraz Oct 1943 A
2391537 Anderson Dec 1945 A
2393831 Stader Jan 1946 A
2406987 Anderson Sep 1946 A
2883219 Cox Apr 1959 A
3691788 Mazziotti Sep 1972 A
3727610 Riniker Apr 1973 A
3863037 Schindler et al. Jan 1975 A
3941123 Volkov et al. Mar 1976 A
3977397 Kalnberz et al. Aug 1976 A
3985127 Volkov et al. Oct 1976 A
4006740 Volkov et al. Feb 1977 A
4100919 Oganesyan et al. Jul 1978 A
4127119 Kronner Nov 1978 A
4185623 Volkov et al. Jan 1980 A
4308863 Fischer Jan 1982 A
4338927 Volkov et al. Jul 1982 A
4365624 Jaquet Dec 1982 A
4403606 Woo et al. Sep 1983 A
4450834 Fischer May 1984 A
4520983 Templeman Jun 1985 A
4548199 Agee Oct 1985 A
4554915 Brumfield Nov 1985 A
4611586 Agee et al. Sep 1986 A
4615338 Ilizarov et al. Oct 1986 A
4730608 Schlein Mar 1988 A
4768524 Hardy Sep 1988 A
4784125 Monticelli et al. Nov 1988 A
4819496 Shelef Apr 1989 A
4889111 Ben-Dov Dec 1989 A
4890631 Hardy Jan 1990 A
4905680 Tunc Mar 1990 A
4973332 Kummer Nov 1990 A
4976582 Clavel et al. Dec 1990 A
4978348 Ilizarov Dec 1990 A
5028180 Sheldon et al. Jul 1991 A
5062844 Jamison et al. Nov 1991 A
5067954 Ilizarov Nov 1991 A
5074866 Sherman et al. Dec 1991 A
5087258 Schewior Feb 1992 A
5112331 Miletich May 1992 A
5122140 Asche et al. Jun 1992 A
5160335 Wagenknecht Nov 1992 A
5179525 Griffis et al. Jan 1993 A
5207676 Canadell et al. May 1993 A
5275598 Cook Jan 1994 A
5279176 Tahmasebi et al. Jan 1994 A
5301566 Tahmasebi et al. Apr 1994 A
5353504 Pai Oct 1994 A
5358504 Paley et al. Oct 1994 A
5372597 Hotchkiss et al. Dec 1994 A
5391167 Pong et al. Feb 1995 A
5397322 Campopiano et al. Mar 1995 A
5437666 Tepic et al. Aug 1995 A
5451225 Ross, Jr. et al. Sep 1995 A
5466237 Byrd, III et al. Nov 1995 A
5496319 Allard et al. Mar 1996 A
5540686 Zippel et al. Jul 1996 A
5568993 Potzick Oct 1996 A
5630814 Ross, Jr. et al. May 1997 A
5658283 Huebner Aug 1997 A
5662648 Faccioli et al. Sep 1997 A
5681309 Ross, Jr. et al. Oct 1997 A
5688271 Faccioli et al. Nov 1997 A
5702389 Taylor et al. Dec 1997 A
5709681 Pennig Jan 1998 A
5713897 Goble et al. Feb 1998 A
5725526 Allard et al. Mar 1998 A
5725527 Biedermann et al. Mar 1998 A
5728095 Taylor et al. Mar 1998 A
5766173 Ross, Jr. et al. Jun 1998 A
5776132 Blyakher Jul 1998 A
5776173 Madsen, Jr. et al. Jul 1998 A
5779703 Benoist Jul 1998 A
5788695 Richardson Aug 1998 A
5797908 Meyers et al. Aug 1998 A
5843081 Richardson Dec 1998 A
5846245 McCarthy et al. Dec 1998 A
5863292 Tosic Jan 1999 A
5870834 Sheldon Feb 1999 A
5885282 Szabo Mar 1999 A
5891143 Taylor et al. Apr 1999 A
5897555 Clyburn et al. Apr 1999 A
5919192 Shouts Jul 1999 A
5921985 Ross, Jr. et al. Jul 1999 A
5928230 Tosic Jul 1999 A
5931837 Marsh et al. Aug 1999 A
5968043 Ross, Jr. et al. Oct 1999 A
5971984 Taylor et al. Oct 1999 A
5976133 Kraus et al. Nov 1999 A
5997537 Walulik Dec 1999 A
6007535 Rayhack et al. Dec 1999 A
6010501 Raskin et al. Jan 2000 A
6013081 Burkinshaw et al. Jan 2000 A
6021579 Schimmels et al. Feb 2000 A
6030386 Taylor et al. Feb 2000 A
6036691 Richardson Mar 2000 A
6086283 Ziegert Jul 2000 A
6090111 Nichols Jul 2000 A
6099217 Wiegand et al. Aug 2000 A
6129727 Austin et al. Oct 2000 A
6176860 Howard Jan 2001 B1
6196081 Yau Mar 2001 B1
6245071 Pierson Jun 2001 B1
6277118 Grant et al. Aug 2001 B1
6328737 Moorcroft et al. Dec 2001 B1
6342052 Allende Jan 2002 B1
6342054 Mata Jan 2002 B1
6355037 Crosslin et al. Mar 2002 B1
6371957 Amrein et al. Apr 2002 B1
6391250 Wolfsgruber et al. May 2002 B1
6423061 Bryant Jul 2002 B1
6428540 Claes et al. Aug 2002 B1
6491694 Orsak Dec 2002 B1
6537275 Venturini et al. Mar 2003 B2
6565565 Yuan et al. May 2003 B1
6565567 Haider May 2003 B1
6610063 Kumar et al. Aug 2003 B2
6613049 Winquist et al. Sep 2003 B2
6648583 Roy et al. Nov 2003 B1
6648891 Kim Nov 2003 B2
6652524 Weiner Nov 2003 B1
6671975 Hennessey Jan 2004 B2
6701174 Krause et al. Mar 2004 B1
6733502 Altarac et al. May 2004 B2
6746448 Weiner et al. Jun 2004 B2
6769194 Hennessey Aug 2004 B2
6784125 Yamakawa et al. Aug 2004 B1
6793655 Orsak Sep 2004 B2
6860883 Janowski et al. Mar 2005 B2
6964663 Grant et al. Nov 2005 B2
7022122 Amreim et al. Apr 2006 B2
7048735 Ferrante et al. May 2006 B2
7127660 Blaum Oct 2006 B2
7147640 Huebner et al. Dec 2006 B2
7197806 Boudreaux et al. Apr 2007 B2
7226449 Venturini et al. Jun 2007 B2
7261713 Langmaid et al. Aug 2007 B2
7276069 Biedermann et al. Oct 2007 B2
7282052 Mullaney Oct 2007 B2
7291148 Agee et al. Nov 2007 B2
7306601 McGrath et al. Dec 2007 B2
7311711 Cole Dec 2007 B2
7361176 Cooper et al. Apr 2008 B2
7377923 Purcell et al. May 2008 B2
7422593 Cresina et al. Sep 2008 B2
7449023 Walulik et al. Nov 2008 B2
7468063 Walulik et al. Dec 2008 B2
7479142 Weiner et al. Jan 2009 B2
7491008 Thomke et al. Feb 2009 B2
7507240 Olsen Mar 2009 B2
7527626 Lutz et al. May 2009 B2
7575575 Olsen et al. Aug 2009 B2
7578822 Rezach et al. Aug 2009 B2
RE40914 Taylor et al. Sep 2009 E
7608074 Austin et al. Oct 2009 B2
7632271 Baumgartner et al. Dec 2009 B2
7699848 Hoffman et al. Apr 2010 B2
7708736 Mullaney May 2010 B2
7749224 Cresina et al. Jul 2010 B2
7763020 Draper Jul 2010 B2
7803158 Hayden Sep 2010 B2
7806843 Marin Oct 2010 B2
7815586 Grant et al. Oct 2010 B2
7875030 Hoffmann-Clair et al. Jan 2011 B2
7881771 Koo et al. Feb 2011 B2
7887498 Marin Feb 2011 B2
7887537 Ferrante et al. Feb 2011 B2
7931650 Winquist et al. Apr 2011 B2
7938829 Mullaney May 2011 B2
7955333 Yeager Jun 2011 B2
7955334 Steiner et al. Jun 2011 B2
7985221 Coull et al. Jul 2011 B2
8029505 Hearn et al. Oct 2011 B2
8057474 Knuchel et al. Nov 2011 B2
8114077 Steiner et al. Feb 2012 B2
8137347 Weiner et al. Mar 2012 B2
8142432 Matityahu Mar 2012 B2
8147490 Bauer Apr 2012 B2
8147491 Lavi Apr 2012 B2
8157800 Vvedensky et al. Apr 2012 B2
8172849 Noon et al. May 2012 B2
8182483 Bagnasco et al. May 2012 B2
8187274 Schulze May 2012 B2
8192434 Huebner et al. Jun 2012 B2
8202273 Karidis Jun 2012 B2
8241285 Mullaney Aug 2012 B2
8251937 Marin Aug 2012 B2
8257353 Wong et al. Sep 2012 B2
8282652 Mackenzi et al. Oct 2012 B2
8444644 Ross May 2013 B2
8764750 Zgonis Jul 2014 B2
8834467 Singh et al. Sep 2014 B2
8858555 Crozet et al. Oct 2014 B2
8906020 Crozet et al. Dec 2014 B2
8945128 Singh et al. Feb 2015 B2
8951252 Steiner et al. Feb 2015 B2
9220533 Singh et al. Dec 2015 B2
9668794 Kuster et al. Jun 2017 B2
9730730 Singh et al. Aug 2017 B2
9839445 Singh et al. Dec 2017 B2
10080585 Singh et al. Sep 2018 B2
10285734 Singh et al. May 2019 B2
10376285 Singh et al. Aug 2019 B2
11141196 Singh Oct 2021 B2
20010025181 Freedlan Sep 2001 A1
20010049526 Venturini et al. Dec 2001 A1
20020010465 Koo et al. Jan 2002 A1
20020013584 Termaten Jan 2002 A1
20020042613 Mata Apr 2002 A1
20020165543 Winquist et al. Nov 2002 A1
20030063949 Hohenocker Apr 2003 A1
20030069580 Langmaid et al. Apr 2003 A1
20030106230 Hennessey Jun 2003 A1
20030109879 Orsak Jun 2003 A1
20030181911 Venturini Sep 2003 A1
20030191466 Austin et al. Oct 2003 A1
20030216734 Mingozzi et al. Nov 2003 A1
20030225406 Weiner et al. Dec 2003 A1
20040059331 Mullaney Mar 2004 A1
20040073211 Austin et al. Apr 2004 A1
20040073212 Kim Apr 2004 A1
20040097944 Koman et al. May 2004 A1
20040116926 Venturini et al. Jun 2004 A1
20040133199 Coati et al. Jul 2004 A1
20040133200 Ruch et al. Jul 2004 A1
20040167518 Estrada Aug 2004 A1
20040243038 Patterson Dec 2004 A1
20050015087 Walulik et al. Jan 2005 A1
20050043730 Janowski et al. Feb 2005 A1
20050059968 Grant et al. Mar 2005 A1
20050084325 O'Brien et al. Apr 2005 A1
20050113829 Walulik et al. May 2005 A1
20050119656 Ferrante et al. Jun 2005 A1
20050149018 Cooper et al. Jul 2005 A1
20050215997 Austin et al. Sep 2005 A1
20050234448 McCarthy Oct 2005 A1
20050248156 Hsieh Nov 2005 A1
20050251136 Noon et al. Nov 2005 A1
20060155276 Walulik et al. Jul 2006 A1
20060184169 Stevens Aug 2006 A1
20060229605 Olsen Oct 2006 A1
20060235383 Hollawell Oct 2006 A1
20060243873 Carnevali Nov 2006 A1
20060247622 Maughan et al. Nov 2006 A1
20060247629 Maughan et al. Nov 2006 A1
20060261221 Carnevali Nov 2006 A1
20060276786 Brinker Dec 2006 A1
20060287652 Lessig et al. Dec 2006 A1
20070038217 Brown et al. Feb 2007 A1
20070043354 Koo et al. Feb 2007 A1
20070049930 Hearn et al. Mar 2007 A1
20070055233 Brinker Mar 2007 A1
20070055234 McGrath et al. Mar 2007 A1
20070123857 Deffenbaugh et al. May 2007 A1
20070161983 Cresina et al. Jul 2007 A1
20070161984 Cresina et al. Jul 2007 A1
20070162022 Zhang et al. Jul 2007 A1
20070225704 Ziran et al. Sep 2007 A1
20070233061 Lehmann et al. Oct 2007 A1
20070250071 Soerensen et al. Oct 2007 A1
20070255280 Austin et al. Nov 2007 A1
20070282338 Mullaney Dec 2007 A1
20080021451 Coull et al. Jan 2008 A1
20080021452 Ducharme et al. Jan 2008 A1
20080154310 White et al. Jun 2008 A1
20080228185 Vasta et al. Sep 2008 A1
20080269741 Karidis Oct 2008 A1
20090018541 Lavi Jan 2009 A1
20090036890 Karidis Feb 2009 A1
20090036891 Brown et al. Feb 2009 A1
20090105621 Boyd et al. Apr 2009 A1
20090124947 Grant May 2009 A1
20090131935 Yeager May 2009 A1
20090157088 Mengato Jun 2009 A1
20090177198 Theodoros et al. Jul 2009 A1
20090198234 Knuchel et al. Aug 2009 A1
20090198235 Steiner et al. Aug 2009 A1
20090264882 Steiner et al. Oct 2009 A1
20090264883 Steiner et al. Oct 2009 A1
20090275944 Huebner et al. Nov 2009 A1
20090287212 Hirata et al. Nov 2009 A1
20090312757 Kehres et al. Dec 2009 A1
20100087819 Mullaney Apr 2010 A1
20100145336 Draper Jun 2010 A1
20100179548 Marin Jul 2010 A1
20100191239 Sakkers et al. Jul 2010 A1
20100234844 Edelhauser et al. Sep 2010 A1
20100249779 Hotchkiss et al. Sep 2010 A1
20100280516 Taylor Nov 2010 A1
20100298827 Cremer et al. Nov 2010 A1
20100305568 Ross et al. Dec 2010 A1
20100312243 Ross et al. Dec 2010 A1
20100331840 Ross et al. Dec 2010 A1
20110060336 Pool et al. Mar 2011 A1
20110066151 Murner et al. Mar 2011 A1
20110082458 Crozet et al. Apr 2011 A1
20110098707 Mullaney Apr 2011 A1
20110112533 Venturini et al. May 2011 A1
20110118737 Vasta et al. May 2011 A1
20110118738 Vasta et al. May 2011 A1
20110172663 Mullaney Jul 2011 A1
20110172664 Bagnasco et al. Jul 2011 A1
20110208187 Wong et al. Aug 2011 A1
20110245830 Zgonis et al. Oct 2011 A1
20110288549 Steiner et al. Nov 2011 A1
20110313418 Nikonovas Dec 2011 A1
20110313419 Mullaney Dec 2011 A1
20120004659 Miller et al. Jan 2012 A1
20120041439 Singh et al. Feb 2012 A1
20120078251 Benenati et al. Mar 2012 A1
20120089142 Mullaney et al. Apr 2012 A1
20120095462 Miller Apr 2012 A1
20120136355 Wolfson May 2012 A1
20120143190 Wolfson Jun 2012 A1
20130253512 Crozet et al. Sep 2013 A1
20140058389 Singh et al. Feb 2014 A1
20140378972 Crozet et al. Dec 2014 A1
Foreign Referenced Citations (32)
Number Date Country
2633944 Jul 2007 CA
596826 Mar 1978 CH
3114455 Oct 1982 DE
4421223 Dec 1995 DE
202006006734 Jun 2006 DE
0377744 Jul 1990 EP
611007 Aug 1994 EP
1016381 Jul 2000 EP
1136041 Sep 2001 EP
2417923 Feb 2012 EP
2417924 Feb 2012 EP
2439002 May 1980 FR
2576774 Aug 1986 FR
2756025 May 1998 FR
2250682 Jun 1992 GB
1259768 Mar 1996 IT
9214426 Sep 1992 WO
9418898 Sep 1994 WO
9730650 Aug 1997 WO
9730651 Aug 1997 WO
0115611 Mar 2001 WO
0122892 Apr 2001 WO
0178613 Oct 2001 WO
03086213 Oct 2003 WO
2006116307 Nov 2006 WO
2007067297 Jun 2007 WO
2007075114 Jul 2007 WO
2007111576 Oct 2007 WO
2009100459 Aug 2009 WO
2010104567 Sep 2010 WO
2011060266 May 2011 WO
2012102685 Aug 2012 WO
Non-Patent Literature Citations (24)
Entry
Alizade et al., Mech. Mach. Theory, vol. 29, No. 1, pp. 115-124, 1994, Great Britain, © 1993.
Basic Ilizarov Techniques, Techniques in Orthopaedics, vol. 5, No. 4, pp. 55-59, Dec. 1990.
BIOMET® Vision™ Footring™ System: Surgical Technique, 39 pages, (2008).
Crozet et al., U.S. Appl. No. 13/788,466, filed Mar. 7, 2013, titled “Dynamic External Fixator and Methods For Use”.
European Search Report for Application No. EP15167691 dated Sep. 17, 2015.
European Search Report, EP 08 15 0944 dated Aug. 18, 2008.
European Search Report, EP 08 15 0960 dated Jul. 30, 2008.
European Search Report, EP 08 15 4754 dated Jul. 4, 2008.
European Search Report, EP 08 15 4761 dated Aug. 21, 2008.
European Search Report, EP 10 172 523 dated Mar. 25, 2011.
European Search Report, EP 11176512, dated Sep. 19, 2011.
European Search Report, EP 11176566, dated Sep. 20, 2011.
Extended European Search Report EP16170790, mailed Dec. 19, 2016, 5 pages.
Extended European Search Report for Application No. EP13180720 dated Apr. 15, 2014.
Extended European Search Report for Application No. EP14154811 dated Jun. 30, 2014.
Extended European Search Report for Application No. EP14158464 dated Jul. 3, 2014.
Hwang et al., Asian Journal of Control, vol. 6, No. 1, pp. 136-144, Mar. 2004.
International Search Report and Written Opinion, PCT/US2010/000712, dated Jun. 28, 2010.
Nanua et al., IEEE Transactions on Robotics and Automation, vol. 6, No. 4, pp. 438-444, Aug. 1990.
Partial European Search Report for Application No. EP13180720 dated Dec. 3, 2013.
S.V. Sreenivasan et al., “Closed-Form Direct Displacement Analysis of a 6-6 Stewart Platform,” Mech. Mach. Theory, vol. 29, No. 6, pp. 855-864, 1994.
Smith&Nephew, Taylor Spatial Frame, website printout, Aug. 12, 2009.
Taylor et al., U.S. Appl. No. 09/827,252, filed Apr. 5, 2001, titled “Orthopaedic Fixation Plate”.
Tibiotalocalcaneal Arthrodesis with the ILIZAROV method, Surgical Technique, ILIZAROV Foot and Ankle External Fixation, Smith & Nephew, Inc., May 2010.
Related Publications (1)
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20210401465 A1 Dec 2021 US
Continuations (7)
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Parent 16429502 Jun 2019 US
Child 17468779 US
Parent 16108787 Aug 2018 US
Child 16429502 US
Parent 15635960 Jun 2017 US
Child 16108787 US
Parent 15485402 Apr 2017 US
Child 15635960 US
Parent 14707630 May 2015 US
Child 15485402 US
Parent 14564675 Dec 2014 US
Child 14707630 US
Parent 13792634 Mar 2013 US
Child 14564675 US
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Parent 13206058 Aug 2011 US
Child 13792634 US