Syndesmosis fixation assembly

Abstract

Syndesmosis fixation assemblies, systems, and methods thereof. A syndesmosis fixation assembly includes a suture retaining portion having a plurality of suture openings formed therein and a suture securing portion rotatably connected to the suture retaining portion. The suture securing portion is movable between a first position wherein a suture is moveable within the suture retaining portion and a second position wherein the suture is frictionally secured within the suture retaining portion. A bone insertion portion has a distal bone insertion end adapted for insertion into a bone, a proximal bone insertion end connected to the suture retaining portion, and a central longitudinal axis extending between the distal bone insertion end and the proximal bone insertion end.

Description

BACKGROUND

Field

The present device relates to constructs that are used in the fixation of syndesmosis disruptions.

Description of the Related Art

A present method for syndesmotic ankle fixation requires screws or suture button systems. Both types of these fixation devices are inserted through the fibula and into the syndesmosis. The cross section of the fibula is relatively small, particularly at the syndesmosis, which can result in the clinician having a difficult time inserting the screw or suture button system through the fibula.

Accordingly, there exists a need for a syndesmosis fixation system that does not extend through the fibula.

SUMMARY

This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

According to one embodiment, a syndesmosis fixation assembly may include a plurality of implantable devices configured to aid in anatomic reduction.

In one embodiment, the syndesmosis fixation assembly may include a suture retaining portion having a plurality of suture openings formed therein and a suture securing portion rotatably connected to the suture retaining portion. The suture securing portion is movable between a first position wherein a suture is moveable within the suture retaining portion and a second position wherein the suture is frictionally secured within the suture retaining portion. A bone insertion portion has a distal bone insertion end adapted for insertion into a bone, a proximal bone insertion end connected to the suture retaining portion, and a central longitudinal axis extending between the distal bone insertion end and the proximal bone insertion end.

In an alternative embodiment, the syndesmosis fixation assembly includes a suture retaining portion having a plurality of suture openings formed therein and a suture extending through each of the plurality of suture openings. A suture securing portion is connected to the suture retaining portion. The suture securing portion is movable between a first position wherein the suture is moveable within the suture retaining portion and a second position wherein the suture is frictionally secured within the suture retaining portion. A bone insertion portion has a distal bone insertion end adapted for insertion into a bone and a proximal bone insertion end connected to the suture retaining portion.

In still another alternative embodiment, the syndesmosis fixation assembly comprises a suture retaining portion and a suture securing portion adapted to move from a first position wherein a suture in the suture retaining portion is moveable with respect to the suture retaining portion and a second position wherein the suture is fixed with respect to the suture retaining portion. A bone insertion portion has a distal portion adapted for insertion into a bone and a proximal portion connected to the suture retaining portion.

BRIEF DESCRIPTION OF THE DRAWINGS

Other aspects, features, and advantages of the present device will become more fully apparent from the following detailed description, the appended claims, and the accompanying drawings in which like reference numerals identify similar or identical elements.

FIG. 1 is a sectional view showing an exemplary method of reducing a syndesmosis according to the exemplary embodiments;

FIG. 2 is an exploded view of a fixation assembly according to an exemplary embodiment;

FIG. 3 is a sectional view of the assembly of FIG. 2 in a suture release position;

FIG. 4 is a sectional view of the assembly of FIG. 2 in a suture restraining position;

FIG. 5 is a perspective view of a fixation assembly according to an alternative exemplary embodiment;

FIG. 6 is a sectional view of the assembly of FIG. 5 in a suture release position;

FIG. 7 is a sectional view of the assembly of FIG. 5 in a suture restraining position;

FIG. 8 is a side elevational view of a fixation assembly according to an alternative exemplary embodiment;

FIG. 9 is a sectional view of the assembly of FIG. 8 in a suture release position;

FIG. 10 is a sectional view of the assembly of FIG. 8 in a suture restraining position;

FIG. 11 is a side elevational view of a fixation assembly according to an alternative exemplary embodiment;

FIG. 12 is a side elevational view of the assembly of FIG. 11 with anchor legs in a deployed position;

FIG. 13 is a sectional view of the assembly of FIG. 11 with the anchor legs in the deployed position;

FIG. 14 is a perspective view of the anchor used with the assembly of FIG. 11;

FIG. 15 is a side elevational view of a fixation assembly according to an alternative exemplary embodiment;

FIG. 16 is a side elevational view of the assembly of FIG. 15 with anchor legs in a deployed position;

FIG. 17 is a sectional view of the assembly of FIG. 15 with the anchor legs in the deployed position;

FIG. 18 is a perspective view of the assembly of FIG. 15 with the anchors deployed;

FIG. 19 is a perspective view of a fixation device according to an alternative exemplary embodiment;

FIG. 20 is a perspective view of a fixation device according to another alternative exemplary embodiment;

FIG. 21 is a sectional view of the device of FIG. 20;

FIG. 22 is a perspective view of a pair of fixation assemblies according to an alternative exemplary embodiment embedded in a tibia and used to reduce a syndesmosis;

FIG. 23 is a perspective view of a washer with a buckle used with the assembly of FIG. 22;

FIG. 24 is a sectional view of the assembly of FIG. 22;

FIG. 25 is a perspective view of a fixation device according to an alternative embodiment;

FIG. 26 is a side elevational view, in section, of a washer with a cam operated buckle in a release position according to an alternative exemplary embodiment;

FIG. 27 is a side elevational view, in section, of the washer with am operated buckle of FIG. 26 in a locking position;

FIG. 28 is a sectional view showing an exemplary method of reducing a syndesmosis according to an alternative exemplary embodiment;

FIG. 29 is a sectional view of the embodiment of FIG. 28 with a clamp connecting two sutures;

FIG. 30 is a perspective view of an exemplary clamping tool used to clamp the clamp of FIG. 29;

FIG. 31 is a top plan view of a staple inserted into the clamp of FIG. 30;

FIG. 32 is a top plan view of the clamp and staple of FIG. 31 having clamped down on the staple; and

FIG. 33 is a schematic view of a fixation assembly according to an alternative exemplary embodiment.

DETAILED DESCRIPTION

In the drawings, like numerals indicate like elements throughout. Certain terminology is used herein for convenience only and is not to be taken as a limitation on the present device. The terminology includes the words specifically mentioned, derivatives thereof and words of similar import. As used herein, the term “proximal” is intended to mean a direction closer to a clinician implanting the inventive devices and the term “distal” is intended to mean a direction farther from the clinician.

The embodiments illustrated below are not intended to be exhaustive or to limit the device to the precise form disclosed. These embodiments are chosen and described to best explain the principle of the device and its application and practical use and to enable others skilled in the art to best utilize the device.

Reference herein to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the device. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments necessarily mutually exclusive of other embodiments. The same applies to the term “implementation.”

As used in this application, the word “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects or designs. Rather, use of the word exemplary is intended to present concepts in a concrete fashion.

Additionally, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or”. That is, unless specified otherwise, or clear from context, “X employs A or B” is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then “X employs A or B” is satisfied under any of the foregoing instances. In addition, the articles “a” and “an” as used in this application and the appended claims should generally be construed to mean “one or more” unless specified otherwise or clear from context to be directed to a singular form.

Unless explicitly stated otherwise, each numerical value and range should be interpreted as being approximate as if the word “about” or “approximately” preceded the value of the value or range.

The use of figure numbers and/or figure reference labels in the claims is intended to identify one or more possible embodiments of the claimed subject matter in order to facilitate the interpretation of the claims. Such use is not to be construed as necessarily limiting the scope of those claims to the embodiments shown in the corresponding figures.

It should be understood that the steps of the exemplary methods set forth herein are not necessarily required to be performed in the order described, and the order of the steps of such methods should be understood to be merely exemplary. Likewise, additional steps may be included in such methods, and certain steps may be omitted or combined, in methods consistent with various embodiments of the present device.

Although the elements in the following method claims, if any, are recited in a particular sequence with corresponding labeling, unless the claim recitations otherwise imply a particular sequence for implementing some or all of those elements, those elements are not necessarily intended to be limited to being implemented in that particular sequence.

Also for purposes of this description, the terms “couple,” “coupling,” “coupled,” “connect,” “connecting,” or “connected” refer to any manner known in the art or later developed of joining or connecting two or more elements directly or indirectly to one another, and the interposition of one or more additional elements is contemplated, although not required. Conversely, the terms “directly coupled,” “directly connected,” etc., imply the absence of such additional elements.

The present disclosure provides embodiments of fixation device assemblies that can be used in syndesmosis fixation. The devices and assemblies described herein can be attached to a tibia 40 in two locations, with a suture 50 or suture tape connected to each device and wrapped around a fibula 42 to stabilize the syndesmosis. A simplified illustration of fixation device assemblies described herein is shown in FIG. 1, using generic screws 30 implanted into a tibia 40 on either side of a fibula 42, with a suture 50 or suture tape 52 connected to screws 30 and wrapped over fibula 42 to draw fibula 42 closer to tibia 40 and reduce the syndesmosis.

Referring to FIGS. 2-4, a syndesmosis fixation assembly 100 (“assembly 100”) according to a first exemplary embodiment is shown. Assembly 100 includes a suture retaining portion 110, a suture securing portion 140, and a bone insertion portion 180. Assembly 100 is cannulated along a central longitudinal axis 102 to allow for the optional use of a guide wire through assembly 100 to assist in inserting assembly 100 into bone.

Suture retaining portion 110 includes a generally hollow body 112 having a proximal portion 114, a distal portion 116, and an intermediate portion 118, between the proximal portion 114 and the distal portion 116. Proximal portion 114 includes a cavity 119 having internal threads 120 that are sized to mate with external threads 142 on suture securing portion 140.

Distal portion 116 includes a plurality of distally extending fingers 122 that are separated from adjacent fingers 122 by a longitudinal gap 124. Fingers 122 form an internal space 125 in distal portion 116. In an exemplary embodiment, four fingers 122 are provided, although those skilled in the art will recognize that more or less than four fingers 122 can be provided. A distal end of each finger 122 includes an internal lip 126 that is used to engage bone insertion portion 180. Internal space 125 has an internally extending radial lip 128 that narrows internal space 125 in a proximal direction.

Intermediate portion 118 includes a plurality of suture openings 130 formed therein. In an exemplary embodiment, suture openings 130 include a first suture opening 130a and a second suture opening 130b that are diametrically opposed from each other.

Suture securing portion 140 comprises a set screw that is insertable into cavity 119 and is movable between a first position, shown in FIG. 2, wherein a suture 50 is moveable within the suture retaining portion and a second position, shown in FIG. 3, wherein the suture 50 is frictionally secured within suture retaining portion 110.

Bone insertion portion 180 includes a distal bone insertion end 182 that is adapted for insertion into a bone. Distal bone insertion end 182 includes a threaded portion 184 for gripping the bone.

Bone insertion portion 180 also includes a proximal bone insertion end 186 connected to suture retaining portion 110. Proximal bone insertion end 186 includes a radially extending lip 188 that is used to retain suture retaining portion 110. A hex head 190 is located proximally of lip 188 and is used to insert bone insertion portion 180 into a bone.

To insert assembly 100, bone insertion portion 180 is threaded sub-flush into bone, either using a guide wire (not shown) or, alternatively, without a guide wire. A suture 50 is inserted into first suture opening 130a through suture retaining portion 110 and out second suture opening 130b.

Suture retaining portion 110 is secured onto proximal bone insertion end 186 such that lip 126 on suture retaining portion 110 is forced over lip 188 on bone insertion portion 180 to rotatably secure suture retaining portion 110 onto bone insertion portion 180. Suture 50 can be tensioned by pulling on a free end 58.

Suture securing portion 140 can be screwed down into cavity 119 to frictionally secure suture 50 within suture retaining portion 110.

Referring to FIGS. 5-7, a syndesmosis fixation assembly 200 (“assembly 200”) according to an alternative exemplary embodiment is shown. Assembly 200 includes a suture retaining portion 210, a suture securing portion 240, and a bone insertion portion 280.

Suture retaining portion 210 includes a generally hollow body 212 having a proximal portion 214 and a distal portion 216. Proximal portion 214 includes a cavity 219 having internal threads 220 that are sized to mate with external threads 242 on suture securing portion 240. Proximal portion 214 also includes a plurality of suture openings 218 extending therethrough. Proximal portion 214 also includes a cap 215.

Distal portion 216 includes a head 222 having a circular outer perimeter 223 and a threaded body 224 having a narrower cross section than head 222. Head 222 has a cavity 225 adapted to receive an insertion tool 206 to rotate head 222. In an exemplary embodiment, cavity 225 accepts a hex head driver. Head 222 is sized to fit within cap 215 so that head 222 rotatably engages cap 215. Threaded body 224 is sized to internally thread into a proximal threaded cavity 285 in a proximal bone insertion end 283 of bone insertion portion 280.

Suture securing portion 240 comprises a set screw 242 that is insertable into cavity 219 and is movable between a first position, shown in FIG. 6, wherein a suture is moveable within suture retaining portion 210 and a second position, shown in FIG. 7, wherein the suture can be frictionally secured within suture retaining portion 110. Set screw 242 is generally hollow with an internal hex face 244 and a distal end 248.

Bone insertion portion 280 includes a distal bone insertion end 282 that is adapted for insertion into a bone. Distal bone insertion end 282 includes a threaded portion 284 for gripping the bone. A central longitudinal axis 292 extends between distal bone insertion end 282 and proximal bone insertion end 283.

Suture securing portion 240 is threadingly disposed in cavity 219 and movable between a first position wherein the suture is moveable within suture retaining portion 210 and a second position wherein the suture is frictionally secured within suture retaining portion 210. The first position is a distal position relative to bone insertion portion 280 and the second position is a proximal position relative to the bone insertion portion 280.

To insert assembly 200, head 222 is inserted through cap 215 such that threaded body 224 extends distally from cap 215. A suture (not shown) in inserted into one suture opening 218 and out another suture opening 218. A retaining tool 202 is inserted over suture retaining portion so that nubs 204 on distal ends of retaining tool 202 are inserted into diametrically opposing suture openings 218 and help to prevent rotation of cap 215 and the suture as assembly 200 is driven into the bone.

Next, threaded body 215 is inserted into threaded cavity 285 in proximal bone insertion end 283 of bone insertion portion 280 and bone insertion portion 280 is driven into a bone using a driver 206 inserted into head 222. Then, an outer driver 208 is used to rotate set screw 242 distally from the position shown in FIG. 6 to the position shown in FIG. 7 until distal end 248 of set screw 242 engages the top of head 222, thereby securing the suture between set screw 242 and head 222.

Referring to FIGS. 8-10, a syndesmosis fixation assembly 300 (“assembly 300”) according to an alternative exemplary embodiment is shown. Assembly 300 includes a suture retaining portion 310, a suture securing portion 340, and a bone insertion portion 380.

Suture retaining portion 310 includes a generally hollow body 312 having a proximal portion 314 and a distal portion 316. Proximal portion 314 includes internal threads 317 that accepts an insertion tool 302. Proximal portion 314 also includes a plurality of suture openings 318 extending therethrough. The plurality of suture openings 318 comprises a first opening 318a and a second opening 318b, proximal of first opening 318a.

Distal portion 316 includes a cap 322 that is sized to receive suture securing portion 340 to frictionally engage a suture 50 that extends from suture openings 318a, 318b. A lip 324 extends radially inwardly from cap 322.

Suture securing portion 340 comprises a head 342 adapted to receive an insertion tool 304 to rotate head 342. In an exemplary embodiment, head 342 accepts a hex head driver. Head 342 ends in an annular shoulder 344 that engages insertion tool 304. Head 342 includes a bulbous body 348 extending distal of shoulder 344, with a circumferential groove 350 formed therein. A passage 351 is provided between body 348 and suture retaining portion 310 from first suture slot 318a to second suture slot 318b so that suture 50 can be slid along passage 351.

A distal end 352 of suture securing portion 340 includes a threaded body 360 that is sized to internally thread into a proximal threaded cavity 385 in a proximal bone insertion end 383 of bone insertion portion 380. A lip 388 extends around distal end 352 between threaded body 360 and head 342.

Bone insertion portion 380 includes a distal bone insertion end 382 that is adapted for insertion into a bone. Distal bone insertion end 382 includes a threaded portion 384 for gripping the bone. A central longitudinal axis 392 extends between distal bone insertion end 382 and proximal bone insertion end 383.

Suture securing portion 340 is disposed in suture retaining portion 310 such that and movable between a first position wherein suture 50 is moveable within suture retaining portion 310 and a second position wherein suture 50 is frictionally secured suture retaining portion 310 and suture securing portion 340. The first position is a distal position relative to bone insertion portion 380 and the second position is a proximal position relative to the bone insertion portion 380.

Referring to FIGS. 9 and 10, to insert assembly 300, threaded body 360 of suture securing portion 340 is inserted through cap 322 such that threaded body 360 extends distally from cap 322 so that lip 324 is distal of lip 388. A suture 50 in inserted into one suture opening 218a and out another suture opening 218b.

A first retaining tool 302 is threaded onto internal threads 317 of proximal portion 314 to prevent rotation of suture retaining portion 310. A second retaining tool 304 is inserted into first retaining tool 302 and over head 342 until second training tool engages shoulder 344.

Next, threaded body 360 is inserted into threaded cavity 385 in proximal bone insertion end 383 of bone insertion portion 380 and bone insertion portion 380 is driven into a bone using a driver 304 inserted over head 342 until bone insertion portion is sub-flush with bone. Both drivers 302, 304 can then be removed.

To frictionally secure suture 50, cap 322 is pulled proximally in the direction of arrow “A” in FIG. 9 so that lip 324 snaps over lip 388 and remains proximally over lip 388. Suture retaining portion 310 engages head 342 so that passage 351 is reduced, thereby frictionally securing suture 50 between body 348 of head 342 and suture retaining portion 310.

Referring to FIGS. 11-14, a syndesmosis fixation assembly 400 (“assembly 400”) according to an alternative exemplary embodiment is shown. Assembly 400 includes a suture retaining portion 410, a suture securing portion 420, and a bone insertion portion 440.

Suture retaining portion 410 includes a plurality of distally extending fingers 412 that are separated from adjacent fingers 412 by a longitudinal gap 414. Fingers 412 form an internal space 415 in suture retaining portion 410. In an exemplary embodiment, four fingers 412 are provided, although those skilled in the art will recognize that more or less than four fingers 412 can be provided.

Internal space 415 has an internal thread 416 to threadingly accept and engage suture securing portion 420. Internal space 415 bottoms out on a landing 417. Suture retaining portion 410 also includes external ribbing 418 that allows assembly 400 to be inserted into a pre-drilled hole (not shown) but resists being pulled out.

Suture securing portion 420 includes a deformable spring anchor 422 that serves as both suture securing portion 420 as well as an anchor to secure assembly 400 in bone. Spring anchor 422 includes a body portion 424 with a plurality of anchor legs 426 extending outwardly therefrom. The number of anchor legs 426 is the same number as the number of longitudinal gaps 414 such that each anchor leg 424 extends into a respective gap 414, while body portion 424 can slide within internal space 415.

Suture securing portion 420 further includes a set screw 428 that is insertable into internal space 415. Set screw 428 has a blunt distal tip 430 and a proximal head 432 that is configured to accept a driver (not shown) for rotating set screw 428 distally into internal space 415. Set screw 428 has an external thread 434 that mates with internal thread 416 to advance set screw 428 distally.

Bone insertion portion 440 extends distally from suture retaining portion 410 and includes a blunt distal tip 442 and external ribbing 444 that is an extension of the external ribbing 418 on suture retaining portion 410.

In an insertion condition, anchor legs 426 are stored within the perimeter of fingers 412, as shown in FIG. 11. A suture (not shown) can be inserted into suture retaining portion 410 such that each end of the suture extends outwardly of one of gaps 414. Bone securing portion 440 is inserted into the bone and set screw 428 is advanced distally into internal space 415, driving anchor 422 distally until anchor 422 frictionally engages the suture between anchor body portion 424 and landing 417 of internal space 415.

As set screw 428 is further advanced distally, anchor legs 426 are deformed to splay outwardly from the stored position, as shown in FIG. 11, to a deployed position, as shown in FIGS. 12 and 13.

Referring to FIGS. 15-18, a syndesmosis fixation assembly 450 (“assembly 450”) according to an alternative exemplary embodiment is shown. Assembly 450 includes a suture retaining portion 460, a suture securing portion 470, and a bone insertion portion 490.

Suture retaining portion 460 includes a plurality of distally extending generally semi-circular leg portions 462 that are separated from each other by a pair of diametrically opposed longitudinal gaps 464. Leg portions 462 form an internal space 465 in suture retaining portion 460. In an exemplary embodiment, two diametrically opposed leg portions 462 are provided, although those skilled in the art will recognize that more or less than two leg portions 462 can be provided.

Internal space 465 has an internal thread 466 to threadingly accept and engage suture securing portion 470. Internal space 465 bottoms out on a landing 467. A pair of diametrically opposed suture slots 468 extend from internal space 465 through each leg portion 462. Suture slots 468 are generally rectangular in cross section and are sized to allow a suture (not shown) to extend therethrough. Suture retaining portion 460 also includes external ribbing 469 that allows assembly 450 to be inserted into a pre-drilled hole (not shown) but resists being pulled out.

Suture securing portion 470 includes a pair of diametrically opposed cam-operated blades 476 that form an anchor to secure assembly 450 in bone. Blades 476 are movable between a stored position in which blades 476 are stored wholly within gaps 464, as shown in FIG. 15, and a deployed position in which blades 476 extend outwardly of leg portions 462, as shown in FIGS. 16-18.

Each blade 476 includes a sloped cam face 478 that, in a stored position, extends obliquely relative to a longitudinal axis 480 of suture retaining portion 460. A distal end 482 of each blade 476 is pivotally attached to bone insertion portion 490 at a pivot 484, located distal of landing 467.

Suture securing portion 470 includes a set screw 479 that is insertable into internal space 465. Set screw 479 has a blunt distal tip 480 and a proximal head 482 that is configured to accept a driver (not shown) for rotating set screw 479 distally into internal space 465. Set screw 479 has an external thread 484 that mate with internal thread 466 to advance set screw 479 distally.

Bone insertion portion 490 extends distally from suture retaining portion 460 and includes a blunt distal tip 492 and external ribbing 494 that is an extension of the external ribbing 468 on suture retaining portion 460.

In an insertion condition, blades 476 are stored within the perimeter of leg portions 462. A suture (not shown) can be inserted into suture retaining portion 460 such that each end of the suture extends outwardly of one of suture slots 468. Bone insertion portion 490 is inserted into the bone and set screw 479 is advanced distally into internal space 465, engaging cam face 478 of each blade 476 and pushing blades 476 outwardly through their respective gap 464 to secure assembly 450 into bone. As set screw 479 is further advanced distally, set screw 479 engages the suture and frictionally secures the suture between distal tip 480 and landing 467.

Alternatively, as shown in FIG. 19, an anchor 830 includes a distal tip 832 with a transverse passage 834 passing through. Anchor 830 also has a proximal end 836 configured to accept a driver (not shown). A body 838 having uni-directional ribbing 840 extends from proximal end 836 to distal tip 832.

To insert anchor 830, suture 50 or suture tape 52 (not shown) is passed through transverse passage 834 and anchor is tapped into a pre-drilled hole on tibia 40 (not shown). Suture 50 or suture tape 52 is wedged between anchor 830 and the wall of hole.

In an alternative embodiment shown in FIGS. 20 and 21, an anchor 880 includes a cannulated body 882 having an external thread 884. A distal tip 886 includes a transverse, first passage 888 and an oblique, second passage 890 proximal of first passage 888. Second passage 890 includes a first portion 891 that extends obliquely upwardly into an internal cannula 892 and a second portion 894, diametrically opposite from first portion 891, that also extends obliquely upwardly into internal cannula 892. Internal cannula 892 extends from first passage 888 to a proximal end 896 that can include a hex head 898 to accommodate a driver (not shown). The driver can be cannulated to allow a suture to extend therethrough.

Suture 50 or suture tape 52 is looped through either first passage 888 or second passage 890 and passes through cannula 892 to proximal end 896.

An alternative embodiment of an assembly 900 is shown in FIGS. 22-24. Assembly 900 includes a washer 910 and a buckle 920 extending outwardly from washer 910. A suture tape 52 is secured to buckle 920.

Washer 910 includes a generally annular body 912 having a flat top surface 914 and a tapered inner diameter 916. A circular opening 918 is formed within inner diameter 916 and is sized to allow a fixation screw to be inserted therethrough.

Buckle 920 extends at an upward oblique angle from top surface 914 and includes parallel side walls 922, 924, a top connecting member 926, and a central connecting member 928 that each span and connect sides 922, 924 to each other. A first, lower gap 930 is formed between central connecting member 928 and body 912, while a second, upper gap 934 is formed between central connecting member 928 and top member 926.

Referring to FIGS. 22 and 24, to use assembly 900, two screws 70 with washers 910 are inserted into tibia 40 so that suture tape 52 can be wrapped around fibula 42. A first end 54 of suture tape 52 is secured to a first buckle 920. A second end 56 of suture tape 52 stretched over fibula 42 and is inserted through lower gap 930 distal from washer 910 toward washer 910. Second end 56 is then extended upwardly and over top connecting member 926 and then inserted through upper gap 934 distal from washer 910 toward washer 910. Second end 56 is then inserted through lower gap 932, proximate to washer 910 away from washer 910. Second end 56 is then pulled upwardly, tightening suture tape 52 against fibula 42.

Alternatively, second end 56 can be inserted through gaps 932, 934 prior to securing washer 910 to tibia 40, then securing washer 910 to tibia 40, and then tightening suture tape 52 around fibula.

An alternative embodiment includes a screw 1000 shown in FIG. 25. Screw 1000 has a distal tip 1002 and a proximal end 1004. A threaded body 1010 can extend between tip 1002 and proximal end 1004. Body 1010 can have varying outer diameters along the length of body, such as a narrow body portion 1012 toward distal tip 1002 and a wider body portion 1014 toward proximal end 1004.

Proximal end 1004 includes a buckle 1030 similar to buckle 920 described above with respect to assembly 900. This washerless embodiment allows buckle 1030 to be driven sub-flush of the bone cortex. The tensioning method for suture tape 52 is the same as for assembly 900 described above.

An alternative embodiment of an assembly 1100 is shown in FIGS. 26 and 27. Assembly 1100 includes a washer 1110 with a buckle 1120 that incorporates a cam 1130.

Washer 1110 includes a generally annular body 1112 having a flat top surface 1114 and a tapered inner diameter 1116. A circular opening 1118 is formed within inner diameter 1116 and is sized to allow a fixation screw to be inserted therethrough.

Buckle 1120 extends at an upward oblique angle from top surface 1114 and includes parallel side walls 1122, 1124 and a top connecting member 1126 that spans and connects sides 1122, 1124 to each other. Side walls 1122, 1124 each include a transverse slot 1128. Connecting member 1126 includes a concave inner face 1129.

Each side of cam 1130 includes a pivot portion 1132 that is inserted into transverse slot 1128 to that cam 1130 can pivot about transverse slot 1128. Cam 1130 also includes a lobe 1134 positioned over that is used to bias suture tape 52 against top surface 1112 of washer 1110 and a slot 1136 through which suture tape 52 is inserted.

First end 54 of suture tape 52 can be fixed to another securing device, not shown. Second end 56 of suture tape 52 can be inserted into gap 1127 distal from washer 110 toward washer 1110 and under lobe 1134. Second end 56 is then inserted through slot 1136 in cam 1130. To secure suture tape 52, cam 1130 is pivoted along concave inner face 1129 from the position shown in FIG. 26 to the position shown in FIG. 27. Lobe 1134 is rotated to pinch suture tape 52 down on top surface 114, securing suture tape 52 to assembly 1110.

While assembly 1100 is shown using washer 1110, those skilled in the art will recognize that buckle 1120 with cam 1130 can be used on other securing devices, such as, for example, on screw 1000.

An alternative embodiment of an assembly 1200 is shown in FIGS. 28-32. Assembly 1200 includes screws 70 that are implanted into tibia 40 on either side of fibula 42. A suture 50 is attached to each screw 70 so that each suture 50 has a free end 58. Free ends 58 are drawn over fibula 42 and clamped together, such as by staple 1202. Staple 1202 can be clamped around free ends 58 by a clamping instrument 1210.

Clamping instrument 1210 includes a pair of arms 1212, 1214 that are pivotally attached to each other at a pivot 1216. Instrument 1210 includes a staple receiver 1215 on an opposing side of pivot 1216. Clamping teeth 1218, 1220 are attached to distal ends of arms 1212, 1214, respectively on the opposing side of pivot 1216 and on either side of receiver 1215.

As shown in FIG. 31, staple 1202 is inserted into receiver 1215. Free ends 58 of sutures 50 are inserted into staple 1202 and arms 1214, 1216 are compressed toward each other as shown in FIG. 32 so that clamping teeth 1218, 1220 close down on staple arms 1204 to clamp free ends 58 of suture 50 within staple.

An alternative embodiment of an assembly 1300 is shown in FIG. 33. Assembly 1300 includes a band 1302 that connects two separate sutures 50 to each other. Sutures 50 can be secured to a bone (not shown) via any of the anchors disclosed herein, such that free ends 58 of sutures extend away from the anchors. Band 1302 includes clamps 1304 are either end thereof to secure free ends 58 of sutures 50.

Each clamp 1304 includes a body 1306 having a closure 1308 pivotally attached thereto. Free end 58 of suture 50 can be inserted through clamp 1304 between body 1306 and closure 1308. Closure 1308 can be pivoted to body 1306 to secure suture 50 between body 1306 and closure 1308.

An advantage to using band 1302 is that band 1302 can be slid along either suture 50 to a select location prior to securing suture 50 to band 1302 in order to avoid engaging any anatomically challenging areas.

The anchors and assemblies disclosed herein can be constructed from biocompatible materials, such as stainless steel, titanium, or other suitable materials or combinations thereof.

It will be further understood that various changes in the details, materials, and arrangements of the parts which have been described and illustrated in order to explain the nature of this device may be made by those skilled in the art without departing from the scope of the device as expressed in the following claims.

Claims

1. A syndesmosis fixation assembly comprising: a suture retaining portion having a plurality of fingers, each finger separated by a longitudinal gap;a suture securing portion configured to be received in the suture retaining portion, wherein the suture securing portion has an anchor with anchor legs, each anchor leg configured to extend into one of the longitudinal gaps; anda bone insertion portion having: a distal bone insertion end adapted for insertion into a bone;a proximal bone insertion end extending distally from the suture retaining portion; anda central longitudinal axis extending between the distal bone insertion end and the proximal bone insertion end.

2. The syndesmosis fixation assembly according to claim 1, wherein a suture is configured to be inserted into suture retaining portion such that each end of the suture extends outwardly from one of the longitudinal gaps.

3. The syndesmosis fixation assembly according to claim 2, wherein the suture retaining portion further includes a set screw configured to be received into the suture securing portion.

4. The syndesmosis fixation assembly according to claim 3, wherein the set screw has a blunt distal tip.

5. The syndesmosis fixation assembly according to claim 4, wherein the distal bone insertion end is blunt.

6. The syndesmosis fixation assembly according to claim 3, wherein the set screw has threads that mate with threads an internal thread in suture retaining portion.

7. The syndesmosis fixation assembly according to claim 2, wherein the set screw is configured to advance into suture retaining portion to cause the anchor to frictionally engage the suture.

8. The syndesmosis fixation assembly according to claim 7, wherein the set screw is configured to splay each anchor leg out of one of the longitudinal gaps as set screw is advanced into the suture retaining portion.

9. The syndesmosis fixation assembly according to claim 1, wherein the suture retaining portion and the bone insertion portion contain external ribbing.

10. The syndesmosis fixation assembly according to claim 1, wherein the anchor is a spring anchor with a body portion and the anchor legs extend outwardly from the body portion.