IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0853689
(2010-08-10)
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등록번호 |
US-9211147
(2015-12-15)
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발명자
/ 주소 |
- Gordon, Charles
- Triplett, Daniel
- Ewer, Darin
- Nelson, Nathan
- Sinnott, M. Mary
- Fauth, Andrew
- Yap, Marc
|
출원인 / 주소 |
|
대리인 / 주소 |
Norton Rose Fulbright US LLP
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인용정보 |
피인용 횟수 :
3 인용 특허 :
84 |
초록
▼
A bone plate assembly including at least one bone plate, polyaxially adjustable fixation elements and a polyaxially adjustable locking mechanism. A first plate includes at least one polyaxial element for lockable connection with a fixation pad, and a connection feature which allows the plate to tran
A bone plate assembly including at least one bone plate, polyaxially adjustable fixation elements and a polyaxially adjustable locking mechanism. A first plate includes at least one polyaxial element for lockable connection with a fixation pad, and a connection feature which allows the plate to translate and polyaxially rotate relative to the locking mechanism. A second plate includes at least one polyaxial element for connection with a fixation pad and a connection feature for non-rotatable connection with the locking mechanism. The locking mechanism allows translation and polyaxial adjustment of the first plate relative to the second plate and locks the first and second plates via a taper lock. The fixation pad includes a deflectable spacer configured to prevent premature locking of the pad. Methods for implantation of the bone plate assembly between two bone structures are disclosed. Instrumentation for implantation, compression and locking of the bone plate assembly is disclosed.
대표청구항
▼
1. A bone plate assembly, comprising: a first plate, wherein the first plate comprises an obverse side, a reverse side, and a first pivot element configured to allow the plate to pivot about an axis, wherein the reverse side is opposite the obverse side;a second plate comprising an obverse side and
1. A bone plate assembly, comprising: a first plate, wherein the first plate comprises an obverse side, a reverse side, and a first pivot element configured to allow the plate to pivot about an axis, wherein the reverse side is opposite the obverse side;a second plate comprising an obverse side and a reverse side, wherein the reverse side is opposite the obverse side;a locking mechanism disposed between the first and second plates, said locking mechanism defining a longitudinal axis; andat least one pad carried by the first plate and disposed along the first plate at an offset location with respect to the longitudinal axis, wherein the pad comprises a bearing face including a plurality of protrusions configured to contact a bone and a pad pivot element, wherein the bearing face is adjacent the obverse side, wherein the pad pivot element is configured to allow the at least one pad to pivot about at least one axis relative to the first plate, and wherein the pad pivot element is configured to lock into a fixed position upon receiving a compressive force between the first plate and a bone surface. 2. The plate assembly of claim 1, wherein the at least one pad rotates relative to the plate through a range of motion;wherein the range of motion comprises a neutral position and a tilted position;wherein the bearing face is parallel to the obverse side in the neutral position;wherein the bearing face is oblique to the obverse side in the tilted position. 3. The plate assembly of claim 1, comprising: an initial configuration, wherein the at least one pad freely rotates relative to the first plate; anda final configuration, wherein the at least one pad is locked to the first plate. 4. The plate assembly of claim 3, comprising: a spacer, wherein, in the initial configuration, the spacer prevents unintentional locking of the at least one pad to the plate; wherein, in the final configuration, the spacer permits intentional locking of the at least one pad to the plate. 5. The plate assembly of claim 4, wherein the spacer comprises a flange on the at least one pad. 6. The plate assembly of claim 4, wherein, in the initial configuration, the spacer holds a pivot feature spaced apart from the pad pivot element; wherein, in the final configuration, the spacer deforms as the pivot feature is urged against the pad pivot element. 7. The plate assembly of claim 4, wherein the at least one pad is urged into position for locking with the plate when a spacer deflecting force is applied to the at least one pad;wherein the at least one pad locks with the first plate when a pad locking force is applied to the pad;wherein the at least one pad locking force is greater than the spacer deflecting force. 8. The plate assembly of claim 1, wherein the at least one pad is captive to the first plate. 9. The plate assembly of claim 8, comprising: a retainer, wherein the retainer keeps the at least one pad coupled to the first plate. 10. The plate assembly of claim 9, wherein the first plate comprises an aperture;wherein the retainer comprises a cap on the at least one pad, wherein the cap is spaced apart from the bearing face;wherein the at least one pad extends through the aperture so that the aperture is between the bearing face and the cap;wherein the aperture is smaller than the bearing face and the cap. 11. The plate assembly of claim 1, comprising a plurality of pads disposed along the first plate at an offset location with respect to the longitudinal axis, each of said plurality of pads configured to rotate polyaxially within an inner surface of the first plate. 12. The bone plate assembly of claim 1 wherein the first pivot element is configured so as to allow the plate to polyaxially rotate relative to a second plate. 13. A plate assembly for attachment to a bone surface, comprising: a first plate comprising a first obverse side and a first reverse side opposite the first obverse side, said first plate comprising a first pad and a second pad including a plurality of protrusions configured to contact a bone surface;a second plate comprising a second obverse side and a second reverse side opposite the second obverse side, said second plate comprising a third pad and a fourth pad including a plurality of protrusions configured to contact a bone surface, said first and second plates configured to cooperatively clamp a first and second spinous process; anda locking mechanism coupling the first plate to the second plate so that the first obverse side faces the second obverse side, said locking mechanism configured to extend longitudinally between the first obverse side of the first plate and the second obverse side of the second plate in the gap formed between the first and second spinous processes;wherein the plate assembly has an unlocked configuration and a first locked configuration;wherein, in the unlocked configuration, the first plate rotates and translates relative to the second plate to align the first plate to the bone surface;wherein, in the first locked configuration, the first plate is rotationally and translationally fixed relative to the second plate;wherein the plate assembly is configured to transition from the unlocked configuration to the first locked configuration in response to a compression force exerted medially on the first and second plates toward the bone surface, said compression force urging the first obverse side toward the second obverse side and providing an interference lock. 14. The plate assembly of claim 13, wherein, in the unlocked configuration, the first plate polyaxially rotates relative to the second plate. 15. The plate assembly of claim 13, wherein, in the unlocked configuration, the first plate polyaxially rotates relative to the locking mechanism. 16. The plate assembly of claim 15, wherein the first plate comprises a conical socket; wherein the locking mechanism comprises a spherical protrusion; wherein, in the unlocked configuration, the conical socket rotates polyaxially on the spherical protrusion. 17. The plate assembly of claim 13, wherein, in the unlocked configuration, the first plate and the locking mechanism translate relative to the second plate. 18. The plate assembly of claim 17, comprising: a post coupled to the second plate in a fixed rotational alignment, wherein the post extends generally perpendicular to the obverse side of the second plate;wherein, in the unlocked configuration, the first plate and the locking mechanism translate along the post. 19. The plate assembly of claim 13, wherein, in the first locked configuration, the first plate is rotationally and translationally fixed to the locking mechanism. 20. The plate assembly of claim 13, comprising: a post secured to the second plate in a fixed rotational alignment, wherein the post extends generally perpendicular to the obverse side of the second plate;wherein the first plate comprises a conical socket, wherein the post extends through the socket;wherein the locking mechanism comprises a collet, wherein the collet comprises a spherical protrusion, wherein the post extends through the collet;wherein, in the first locked configuration, the spherical protrusion is wedged between the conical socket and the post. 21. The plate assembly of claim 20, wherein the post comprises a protrusion, wherein the protrusion frictionally engages the second plate to retain the post on the second plate. 22. The plate assembly of claim 20, wherein the locking mechanism comprises a ring; wherein the collet comprises a frustoconical shaft adjoining the spherical protrusion, wherein the frustoconical shaft extends through the ring;wherein the plate assembly has a second locked configuration;wherein, in the second locked configuration, the frustoconical shaft is wedged between the ring and the post. 23. The plate assembly of claim 22, wherein the frustoconical shaft comprises a partial length longitudinal gap. 24. The plate assembly of claim 13, comprising: a first wall extending between the first and second plates, wherein the first wall is generally perpendicular to a selected one of the first and second obverse sides, wherein the first wall is contiguous with a first edge of the selected obverse side; wherein the first wall terminates in a first free end adjacent to the other one of the first and second plates. 25. The plate assembly of claim 24, comprising: a second wall similar to the first wall, wherein the second wall extends between the first and second plates, wherein the second wall is generally perpendicular to the selected obverse side, wherein the second wall is contiguous with a second edge of the selected obverse side opposite the first edge, wherein the second wall terminates in a second free end adjacent to the to the other one of the first and second plates. 26. The plate assembly of claim 24, wherein the first wall further comprises a pair of opposing edges, wherein each one of the pair of edges protrudes from a lateral aspect of the first wall so as to form an open channel extending from the edge of the selected obverse side to the free end. 27. The plate assembly of claim 24, wherein the first wall comprises a window. 28. The bone plate assembly of claim 13 wherein at least one of said first, second, third and fourth pad is configured to polyaxially rotate with respect to its respective plate within a recess of the respective plate. 29. A plate assembly for attachment to a bone surface, comprising: a first plate comprising a first obverse side and a first reverse side opposite the first obverse side, said first plate comprising a first pad and a second pad, said pad including a plurality of protrusions configured to contact a bone surface, said first and second pads of said first plate configured to allow the pads to pivot about at least one axis relative to the first plate;a second plate comprising a second obverse side and a second reverse side opposite the second obverse side, said second plate comprising a third pad and a fourth pad, each pad including a plurality of protrusions configured to contact a bone surface, said third and fourth pads of said second plate configured to allow the third and fourth pads to pivot about at least one axis relative to the second plate, said first and second plates configured to cooperatively clamp a first and second spinous process wherein said first pad of said first plate and said third pad of said second plate contact a first spinous process and said second pad of said first plate and said fourth pad of said second plate contact a second spinous process; anda locking mechanism coupling the first plate to the second plate so that the first obverse side faces the second obverse side, said locking mechanism configured to extend longitudinally between the first obverse side of the first plate and the second obverse side of the second plate in the gap formed between the first and second spinous processes;wherein the plate assembly has an unlocked configuration and a locked configuration;wherein the plate assembly is configured to transition from the unlocked configuration to the locked configuration in response to a compression force exerted medially on the first and second plates toward the bone surface, said compression force urging the first obverse side toward the second obverse side and providing an interference lock. 30. The plate assembly of claim 29, comprising: an initial configuration, wherein the at least one of said first, second, third and fourth pads freely rotates relative to the plate; anda final configuration, wherein the at least one of said first, second, third and fourth pads is locked to the plate. 31. The plate assembly of claim 30, comprising: at least one spacer, wherein, in the initial configuration, the at least spacer prevents unintentional locking of the at least one of said first, second, third and fourth pads to the plate; wherein, in the final configuration, the spacer permits intentional locking of the at least one of said first, second, third and fourth pads to the plate. 32. The plate assembly of claim 31, wherein the spacer comprises a flange on the at least one of said first, second, third and fourth pads.
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