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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0098280 (2011-04-29) |
등록번호 | US-8372122 (2013-02-12) |
우선권정보 | WO-PCT/US2009066567 (2009-12-03); WO-PCT/US2010058776 (2010-12-02) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 1 인용 특허 : 466 |
A bone anchor comprising a self-centering ball-joint suitable for use in a spine stabilization prosthesis which supports the spine while providing for the preservation of spinal motion. The bone anchor has a deflectable ball-rod partially received in a socket of a housing formed in the head of the b
A bone anchor comprising a self-centering ball-joint suitable for use in a spine stabilization prosthesis which supports the spine while providing for the preservation of spinal motion. The bone anchor has a deflectable ball-rod partially received in a socket of a housing formed in the head of the bone anchor. A centering rod received partially in the ball-rod and partially within the housing operates to align the ball-rod with the longitudinal axis of the bone anchor. Deflection of the ball-rod bends the centering rod which in turn applies a restoring force upon the ball-rod. The centering rod includes an inner-superelastic core and an outer polymer sheath.
1. A spinal stabilization device comprising: a centering rod having an inner core and an outer sheath;the centering rod having a first end, a second end and a flexible section connecting the first end and the second end;a ball-rod including at least a partial ball-shaped retainer and a rod;a first b
1. A spinal stabilization device comprising: a centering rod having an inner core and an outer sheath;the centering rod having a first end, a second end and a flexible section connecting the first end and the second end;a ball-rod including at least a partial ball-shaped retainer and a rod;a first bore extending along a longitudinal axis of the ball-rod and opening through the ball-shaped retainer opposite the rod, wherein the first end of the centering rod is received in the first bore;a housing;a socket within the housing, wherein the socket partially encloses the ball-shaped retainer to form a ball-joint;a channel extending from the socket out of the housing, wherein the rod of the ball-rod extends through the channel out of the housing; anda second bore in the housing extending from the socket opposite the channel, wherein the second end of the centering rod is received in the second bore;whereby deflection of the ball-rod bends the flexible section of the centering rod and the centering rod exerts a restoring force to center the rod of the ball-rod within the channel. 2. The spine stabilization device of claim 1, wherein the channel comprises a frusto-conical surface positioned to contact the rod after a predetermined amount of deflection of the rod from center of the channel. 3. The spine stabilization device of claim 1, wherein said inner core of said centering rod is made of a super-elastic metal. 4. The spine stabilization device of claim 1, wherein said inner core of said centering rod is made of nitinol. 5. The spine stabilization device of claim 1, wherein said outer sheath of said centering rod is made of a biocompatible polymer. 6. The spine stabilization device of claim 1, wherein said outer sheath of said centering rod is made of PEEK. 7. The spine stabilization device of claim 1, wherein the first bore further comprises an enlarged portion within the ball-shaped retainer, wherein the flexible section of the centering rod is received in the enlarged portion of the first bore. 8. The spine stabilization device of claim 1, wherein said housing further comprises a threaded bone anchor. 9. The spine stabilization device of claim 1, wherein said ball-rod also includes a threaded mount external to the housing adapted to connect a spinal implant to the ball-rod component. 10. The spine stabilization device of claim 1, wherein said ball-rod is made of cobalt chrome alloy. 11. A spine stabilization device comprising: a first element;a second element; anda self-centering ball-joint connecting the first element and the second element;wherein the self-centering ball-joint includes, a housing having a socket;a ball-rod received in the socket; anda centering rod having an inner core and an outer sheath, the centering rod received partially within the ball-rod and partially within the housing; andwhereby deflection of the ball-rod bends the centering rod and the centering rod exerts a restoring force on the ball-rod. 12. The spine stabilization device of claim 11, wherein said inner core of said centering rod is made of a super-elastic metal. 13. The spine stabilization device of claim 11, wherein said inner core of said centering rod is made of nitinol. 14. The spine stabilization device of claim 11, wherein said outer sheath of said centering rod is made of a biocompatible polymer. 15. The spine stabilization device of claim 11, wherein said outer sheath of said centering rod is made of PEEK. 16. The spine stabilization device of claim 11, wherein the first element is a bone anchor. 17. A spine stabilization device comprising: a bone anchor;a deflectable mount; anda self-centering ball-joint connecting the bone anchor and the deflectable mount;wherein the self-centering ball-joint includes, a housing having a socket;a ball-rod received in the socket; anda centering rod having an inner core and an outer sheath, the centering rod received partially within the ball-rod and partially within the housing;whereby deflection of the ball-rod bends the centering rod and the centering rod exerts a restoring force on the ball-rod. 18. The spine stabilization device of claim 17, wherein said inner core of said centering rod is made of a super-elastic metal and said outer sheath is made of a biocompatible polymer. 19. The spine stabilization device of claim 17, wherein said inner core of said centering rod is made of nitinol and said outer sheath is made of PEEK. 20. The spine stabilization device of claim 17, wherein said bone anchor is formed in one piece with said housing and said deflectable mount is formed in one piece with said ball-rod. 21. A spine stabilization device comprising: a first element;a second element; anda self-centering joint connecting the first element and the second element;wherein the self-centering joint includes, a housing having a socket;a retainer received in the socket such that the retainer is deflectable relative to the housing; anda centering rod having an inner core and an outer sheath, the centering rod received partially within retainer and partially within the housing; andwhereby deflection of the retainer bends the centering rod and the centering rod exerts a restoring force on the retainer. 22. The spine stabilization device of claim 21, wherein said inner core of said centering rod is made of a super-elastic metal. 23. The spine stabilization device of claim 21, wherein said inner core of said centering rod is made of nitinol. 24. The spine stabilization device of claim 21, wherein said outer sheath of said centering rod is made of PEEK. 25. The spine stabilization device of claim 21, wherein the first element is a bone anchor. 26. A spine stabilization device comprising: a bone anchor;a deflectable mount; anda self-centering joint connecting the bone anchor and the deflectable mount;wherein the self-centering joint includes, a housing having a socket;a retainer pivotably received in the socket; anda centering rod having an inner core and an outer sheath, the centering rod received partially within the retainer and partially within the housing;whereby deflection of the retainer bends the centering rod and the centering rod exerts a restoring force on the retainer. 27. The spine stabilization device of claim 26, wherein said inner core of said centering rod is made of a super-elastic metal and said outer sheath is made of a biocompatible polymer. 28. The spine stabilization device of claim 26, wherein said inner core of said centering rod is made of nitinol and said outer sheath is made of PEEK. 29. The spine stabilization device of claim 17, wherein said bone anchor is formed in one piece with said housing and said deflectable mount is formed in one piece with said retainer.
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