IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0974310
(2013-08-23)
|
등록번호 |
US-9510876
(2016-12-06)
|
발명자
/ 주소 |
- Appenzeller, Andreas
- Fluri, Daniel
|
출원인 / 주소 |
- DePuy Synthes Products, Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
12 |
초록
▼
An intramedullary fixation system is configured to be fixed to first and second bone segments that are separated by a defect. The system includes an intramedullary fixation member that includes first and second wire segments that are twisted about each other so as to define a plurality of intersecti
An intramedullary fixation system is configured to be fixed to first and second bone segments that are separated by a defect. The system includes an intramedullary fixation member that includes first and second wire segments that are twisted about each other so as to define a plurality of intersections. A distal one of the intersections is separable, such that rotation of the fixation device in a medullary canal causes bone material in the medullary canal to apply a counterforce to the wire segments that causes the distal intersection to separate, thereby driving respective distal ends of the wire segments into the bone segment, such that subsequent movement of the intramedullary fixation member a toward the first bone segment causes the second bone segment to move toward the first bone segment. The intramedullary fixation system can further include a fixation clip that anchors the intramedullary fixation member to the first bone segment.
대표청구항
▼
1. An intramedullary implant system configured to fix a first bone segment to a second bone segment that is separated from the first bone segment by a gap, the intramedullary implant system comprising: an intramedullary fixation member that defines at least first and second wire segments that each d
1. An intramedullary implant system configured to fix a first bone segment to a second bone segment that is separated from the first bone segment by a gap, the intramedullary implant system comprising: an intramedullary fixation member that defines at least first and second wire segments that each define a proximal end and a free distal end, at least a select one of the first and second wire segments is twisted about the other of the first and second wire segments in a first rotational direction so as to define an intersection that is disposed at least at one of the distal ends whereby the select wire segment crosses the other wire segment,wherein the distal ends are sized to fit into a medullary canal of one of the first and second bone segments, and the distal end of the select wire segment is separable from the distal end of the other of the first and second wire segments 1) in response to a force applied to the distal end of the select wire segment along a second rotational direction that is substantially opposite the first rotational direction, and 2) a sufficient distance so as to thereby fix the distal end of the select wire segment to the one of the first and second bone segments. 2. The intramedullary implant system as recited in claim 1, wherein rotation of the intramedullary fixation member along the first rotational direction causes medullary bone material in the medullary canal to apply the force along the second rotational direction. 3. The intramedullary implant system as recited in claim 2, wherein the intersection is a distal intersection whereby the distal end of the select wire segment crosses the distal end of the other wire segment, and the rotation causes the distal end of the select segment to separate from the distal end of the other wire segment at the distal intersection. 4. The intramedullary implant system as recited in claim 3, wherein the rotation causes the distal intersection to be removed. 5. The intramedullary implant system as recited in claim 3, wherein the first and second wire segments are attached to each other at a location between the proximal ends and the distal intersection. 6. The intramedullary implant system as recited in claim 5, wherein the intramedullary fixation member defines a plurality of intersections whereby the select wire segment crosses the other wire segment at locations between the proximal ends and the distal intersection, and the wire segments are attached to each other at least at one of the plurality of intersections. 7. The intramedullary implant system as recited in claim 6, wherein the first and second wire segments are fused to the each other at the at least one of the plurality of intersections. 8. The intramedullary implant system as recited in claim 7, wherein the first and second wire segments are welded or soldered to each other at the at least one of the plurality of intersections. 9. The intramedullary implant system as recited in claim 7, wherein the second wire segment is twisted about the first wire segment in the first rotational direction. 10. The intramedullary implant system as recited in claim 9, wherein the first and second wire segments are substantially helically twisted about each other so as to define the plurality of intersections, whereby the first and second wire segments are fused to each other at least at some of the intersections, and all of the fused intersections are disposed proximal with respect to the distal intersection. 11. The intramedullary implant system as recited in claim 1, wherein the first and second wire segments are monolithic with each other and attached to each other at their respective proximal ends. 12. The intramedullary implant system as recited in claim 11, wherein the first and second wire segments are defined by a single k-wire. 13. The intramedullary implant system as recited in claim 1, wherein the first and second wire segments are separate from each other. 14. The intramedullary implant system as recited in claim 13, wherein each of first and second wire segments is a k-wire. 15. The intramedullary implant system as recited in claim 1, wherein the first and second wire segments are braided in the first rotational direction. 16. The intramedullary implant system as recited in claim 1, further comprising an anchor member configured to attach to 1) one of the first and second bone segments, and 2) the intramedullary fixation member. 17. The intramedullary implant system as recited in claim 16, wherein the anchor member comprises a fixation clip that defines first and second walls that at least partially define a retention pocket configured to receive the first and second wire segments. 18. The intramedullary implant system as recited in claim 17, wherein at least one of the first and second walls is compressible toward the other of the first and second walls. 19. The intramedullary implant system as recited in claim 17, wherein at least one of the first and second walls defines a ridged outer surface. 20. The intramedullary implant system of claim 1, wherein the first and second wire segments are configured such that a force applied to the distal ends of the first and second wire segments along the second rotational direction causes the distal ends of the first and second wire segments to separate from one another at the intersection. 21. A method of stabilizing a bone having a first bone segment, a second bone segment, and a defect disposed between the first and second bone segments, the method comprising the steps of: inserting an implant into a medullary canal of the bone at the first bone segment, the implant including at least first and second wire segments that each define a proximal end and a free distal end, the first wire segment twisted about the second wire segment in a rotational direction so as to define at least one intersection whereby the first wire segment crosses the second wire segment,advancing the implant along the medullary canal until the distal ends of the first and second wire segments are disposed in the second bone segment; androtating the implant in the rotational direction so as to cause the distal ends to separate from each other at the intersection and couple to a boney wall of the second bone segment in response to a resistive force against rotation of the implant in the rotational direction. 22. The method as recited in claim 21, further comprising the step of, after the rotating step, drawing the implant along a proximal direction from the distal ends toward the proximal ends so as to correspondingly draw the second bone segment toward the first bone segment. 23. The method as recited in claim 22, further comprising, after the drawing step, anchoring the proximal ends to an anchor member that is coupled to the bone. 24. The method as recited in claim 23, further comprising creating an opening in the first bone segment, and inserting the implant through the opening and into the medullary canal of the bone at the first bone segment. 25. The method as recited in claim 24, further comprising attaching the anchor member to the first bone segment, such that at least a portion of the anchor member extends into the opening. 26. The method as recited in claim 24, further comprising, after the rotating step, rotating the first and second proximal ends in a second direction opposite the rotational direction so as to draw the distal ends of the first and second wire segments toward each other, thereby decoupling the distal ends from the boney wall of the second bone segment. 27. The method as recited in claim 26, further comprising, after the second rotating step, withdrawing the implant from the bone.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.