IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0428213
(2006-06-30)
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등록번호 |
US-7727278
(2010-06-22)
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발명자
/ 주소 |
- Olsen, Raymond E.
- Lewis, Wesley I.
- Bianchi, John R.
- Kutsavage, Joe
- Urbaniak, Daniel J.
- Carr, Angela
- Sanders, Ben R.
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출원인 / 주소 |
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대리인 / 주소 |
McAndrews, Held & Malloy, Ltd.
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인용정보 |
피인용 횟수 :
21 인용 특허 :
105 |
초록
▼
The present invention has multiple aspects relating to assembled self fixing bone-tendon-bone (BTB) grafts and BTB implants. A preferred application in which self fixing assembled bone-tendon-bone (BTB) grafts and implants of the present technology can be used is for ACL repairs in a human patient.
The present invention has multiple aspects relating to assembled self fixing bone-tendon-bone (BTB) grafts and BTB implants. A preferred application in which self fixing assembled bone-tendon-bone (BTB) grafts and implants of the present technology can be used is for ACL repairs in a human patient. In one embodiment, a self fixing BTB graft is characterized by the presence of threads along at least a portion of the exterior surface of one or both bone blocks. In another embodiment, a self fixing assembled bone-tendon-bone implant comprises a removable tendon tensioner which imparts a predetermined tension on the tendon of the BTB graft.
대표청구항
▼
What is claimed is: 1. A self fixing bone-tendon-bone (BTB) graft, said self fixing BTB graft comprising a length of graft tendon or ligament having two opposing ends, a first opposing end and a second opposing end, wherein a first bone block is attached to said first opposing end of said graft ten
What is claimed is: 1. A self fixing bone-tendon-bone (BTB) graft, said self fixing BTB graft comprising a length of graft tendon or ligament having two opposing ends, a first opposing end and a second opposing end, wherein a first bone block is attached to said first opposing end of said graft tendon or ligament and a second bone block is attached to said second opposing end of said graft tendon or ligament, and wherein at least one of said first bone block or said second bone block has an exterior surface having threads along at least a portion thereof, and a tensioner that forceably engages the first and second bone blocks positioned on opposing ends of the graft tendon or ligament to exert a tension on the graft tendon or ligament, wherein said tensioner and at least one of said first bone block or said second bone block each comprise at least one hole, slot, or groove in alignment for mounting on an inserter; and wherein said tensioner is disposed between the first bone block and the second bone block. 2. The self fixing BTB graft of claim 1, wherein each of said first bone block and said second bone block has an exterior surface having threads along at least a portion thereof, and wherein the threads of said first bone block and said second bone block run in the same direction so that each bone block is implantable in a respective hole in opposing bones of a joint on a patient when the self fixing BTB graft is rotated as a whole in the threaded direction. 3. The self fixing BTB graft of claim 2, wherein the threads on the first bone block have a smaller outer diameter than the threads on the second bone block. 4. The self fixing BTB graft of claim 2, wherein the threads on the first bone block have a diameter which varies along the length of the first bone block. 5. The self fixing BTB graft of claim 1, wherein the first bone block has an exterior surface having threads along at least a portion thereof, and the second bone block has an exterior surface that is substantially cylindrical, stepped, or tapered. 6. The self fixing BTB graft of claim 1, wherein said tensioner is integrated with an inserter. 7. The self fixing BTB graft of claim 1, wherein said tensioner is not integrated with an inserter. 8. The self fixing BTB graft of claim 1, wherein said tensioner is configured to bend, flex, or break away after implantation. 9. The self fixing BTB graft of claim 1, wherein said tensioner comprises a pair of spacers positioned on opposing sides of said graft tendon or ligament. 10. The self fixing BTB graft of claim 1, wherein said tensioner comprises a single spacer having a slot along its length for encasing said graft tendon or ligament. 11. The self fixing BTB graft of claim 2, wherein the outside surface of said tensioner is threaded with threads running in the same direction as the threads on said first bone block or on said second bone block. 12. The self fixing BTB graft of claim 11, wherein the threads on the surface of said tensioner are contiguous with the threads on said first bone block or on said second bone block. 13. The self fixing BTB graft of claim 1, wherein said first bone block is an assembled bone block sandwiching the first opposing end of said graft tendon or ligament. 14. The self fixing BTB graft of claim 1 wherein said first bone block and said second bone block comprise the same or different materials and said materials are selected from the group consisting of cortical bone, cortical-cancellous bone, cancellous bone, calcium phosphate ceramic, hydroxy apatite, synthetic bone, and combinations thereof. 15. The self fixing BTB graft of claim 14, wherein said first bone block and said second bone block comprise cortical bone. 16. The self fixing BTB graft of claim 15, wherein said first bone block comprises a first bone segment comprising cortical bone and a second bone segment comprising cortical bone that sandwich the first end of said graft tendon or ligament; and said second bone block comprises a third bone segment comprising cortical bone and a fourth bone segment comprising cortical bone that sandwich the second end of said graft tendon or ligament. 17. The self fixing BTB graft of claim 16, wherein said first bone segment comprising cortical bone and said second bone segment comprising cortical bone each have a graft tendon or ligament engaging surface that is textured for gripping the end of said graft tendon or ligament. 18. The self fixing BTB graft of claim 17, wherein the graft tendon or ligament engaging surface of said first bone segment comprising cortical bone comprises compression surfaces and one to ten cavities. 19. The self fixing BTB graft of claim 18, wherein said one to ten cavities comprise one to ten channels. 20. The self fixing BTB graft of claim 19, wherein at least one of said channels comprise a cross-sectional profile selected from the group consisting of dovetail, omega-shaped and a combination thereof. 21. The self fixing BTB graft of claim 20, wherein at least one of said channels has an omega-shaped cross-sectional profile. 22. The self fixing BTB graft of claim 16, wherein said graft tendon or ligament engaging surface of said second bone segment comprising cortical bone comprises rows of ridges that angle opposite the direction of pull of said graft tendon or ligament. 23. The self fixing BTB graft of claim 1, wherein said self fixing BTB graft is perfused or coated with an osteoinductive substance. 24. A self fixing bone-tendon-bone (BTB) graft for implantation through a tibial tunnel, said self fixing BTB graft comprising a length of graft tendon or ligament having two opposing ends, a first opposing end and a second opposing end, said first opposing end having a leading bone block attached thereto, said second opposing end having a trailing bone block attached thereto, said leading bone block and said trailing bone block each having an exterior surface that is threaded so that the threads run in the same direction, whereby the leading bone block and the trailing bone block are suited for simultaneous threading into tapped holes in a patient's femur and tibia, respectively; wherein said self fixing bone-tendon-bone (BTB) graft further comprises a tensioner that wraps around and protects said graft tendon or ligament, and forcibly engages said leading and trailing bone blocks to hold said bone blocks a distance from one another; and wherein said tensioner is disposed between the leading bone block and the trailing bone block. 25. The self fixing BTB graft of claim 24, wherein the threaded surface is aligned between the leading bone block and the trailing bone block. 26. The self fixing BTB graft of claim 25, wherein the leading bone block has a smaller diameter than the trailing bone block. 27. The self fixing BTB graft of claim 25, wherein said leading bone block is an assembled bone block. 28. The self fixing BTB graft of claim 27, wherein said length of graft tendon or ligament is a bundle of one to ten graft tendons or ligaments having a first end and a second end. 29. The self fixing BTB graft of claim 25, wherein said trailing bone block is an assembled bone block. 30. The self fixing BTB graft of claim 25, wherein said leading bone block, said length of graft tendon or ligament, and said trailing bone block are allograft, xenograft or a combination thereof. 31. The self fixing BTB graft of claim 30, wherein said leading bone block, said length of graft tendon or ligament, and said trailing bone block are allograft. 32. The self fixing BTB graft of claim 30, wherein said leading bone block, said length of graft tendon or ligament, and said trailing bone block are xenograft. 33. The self fixing BTB graft of claim 30, wherein said leading bone block, said length of graft tendon or ligament, and said trailing bone block are a combination of allograft and xenograft. 34. An assembled self fixing bone-tendon-bone (BTB) graft for implantation through a tibial tunnel, the self fixing BTB graft comprising a length of graft tendon or ligament having two opposing ends, a first opposing end and a second opposing end, the first opposing end having a leading bone block assembly attached thereto, the second opposing end having a trailing bone block assembly attached thereto, the leading bone block assembly and the trailing bone block assembly each comprising a substantially cylindrical cross-section, and a tensioner disposed between the leading bone block assembly and the trailing bone block assembly; the tensioner configured to maintain tension in the graft tendon or ligament and spacing between the two bone block assemblies during implantation by forceably engaging said leading and trailing bone block assemblies to hold said bone block assemblies a distance from one another, and wherein said tensioner and at least one of said bone blocks each comprise at least one hole, slot, or groove in alignment for mounting on an insertion tool.
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