최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0815054 (2013-01-28) |
등록번호 | US-8900272 (2014-12-02) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 1 인용 특허 : 287 |
A dynamic fixation medical implant includes a longitudinal connecting member assembly having an elongate coil-like outer member and an inner cylindrical core attached to the outer member at only one end thereof. Some assemblies include a second longitudinal connecting member in the form of a rod tha
A dynamic fixation medical implant includes a longitudinal connecting member assembly having an elongate coil-like outer member and an inner cylindrical core attached to the outer member at only one end thereof. Some assemblies include a second longitudinal connecting member in the form of a rod that is fixed to the inner core and extends outwardly from the assembly. Certain assemblies include a threaded core or threaded inserts that cooperate with a helical slit of the coil-like outer member. Two or more cooperating bone screw assemblies attach to the connecting member assembly. The bone screw assemblies may include upper and lower compression members for affixing to and cradling the coil-like outer member only, allowing relative movement between the outer member and the inner cylindrical core. Press fit or snap-on features attach one end of the coil-like outer member to one end of the inner cylindrical core.
1. A polyaxial bone screw assembly comprising: a) a shank having lower structure adapted for anchoring to a bone of a patient and an upper end with an internal drive socket recess therein;b) a receiver having an interior cavity that operably receives the shank upper end and an upper channel having a
1. A polyaxial bone screw assembly comprising: a) a shank having lower structure adapted for anchoring to a bone of a patient and an upper end with an internal drive socket recess therein;b) a receiver having an interior cavity that operably receives the shank upper end and an upper channel having a top surface for receiving a connecting member;c) a pressure insert operably located in the cavity and at least partially between the shank and the connecting member when the connecting member is located in the channel; the pressure insert having upstanding legs that are sized and shaped to extend around and above the connecting member when the connecting member is located in the channel; each of the legs having an upper surface; andd) a closure comprising a closed outer ring and an inner set screw, that in use are both being received within the receiver so as to not extend above said channel top surface and so that the outer ring operably engages and applies downward force to the legs at each insert upper surface when the outer ring is rotatably advanced towards the pressure insert, so as to lock the shank with respect to the receiver independent of the connecting member, and wherein the inner set screw includes a central multi-surfaced drive aperture opening only onto a flat top surface thereof and having an interior lower tool abutment surface near a bottom surface of the inner set screw. 2. The polyaxial bone screw assembly according to claim 1, wherein the closure comprises a closed outer ring fastener threadably secured within the receiver, and wherein the inner set screw is threadably received in the closed outer ring fastener. 3. The polyaxial bone screw assembly according to claim 2, wherein the closed outer ring fastener has a lower surface that is at least partially sloped and operably positioned so as to engage the pressure insert legs each having a mating at least partially sloped upper surface. 4. The polyaxial bone screw assembly according to claim 3, wherein the sloped upper surfaces are sloped upward from an inner side to an outer side of each respective leg. 5. The polyaxial bone screw assembly according to claim 1, wherein each of the legs includes an outwardly extending flange near an upper end thereof. 6. In a polyaxial bone screw having a shank for implanting in a bone, a receiver with a cavity that operably receives an upper portion of the shank and a first pair of upward extending arms forming a channel therebetween adapted to receive a connecting member, the first pair of arms having top surfaces, a compression insert operably positioned above an upper end of the shank and including a second pair of upward extending arms that extend around and above the connecting member when the connecting member is in the channel, the improvement wherein the closure comprises: a) a closed outer ring fastener including a continuously wound external surface guide and advancement thread and a through bore with a continuously wound internal surface guide and advancement thread; andb) an inner set screw having an outer surface with a completely continuous guide and advancement thread near a top thereof and a central tool engaging aperture opening only onto a top surface of the inner set screw, the aperture terminating at a lower interior tool engagement abutment surface near a bottom thereof, said abutment surface having a central axial bore communicating with and opening onto a substantially flat bottom surface of the inner set screw, the inner set screw being threadedly received in the closed outer ring fastener. 7. The improvement according to claim 6, wherein the outer fastener engages the compression insert second pair of arms to provide for downward application of force to the shank from the insert to allow independent locking of the shank relative to the receiver without locking the position of the connecting member relative to the receiver. 8. The improvement according to claim 6, wherein the inner set screw in the final position is positioned extending below a bottom surface of the outer fastener and not above the top surfaces of the receiver first arms. 9. The improvement according to claim 6, wherein the tool engaging aperture of the inner set screw has a multi-surfaced drive structure. 10. The improvement according to claim 6, wherein the receiver first pair of arms each have a radiused outwardly facing groove near the arms top surfaces. 11. A medical implant bone screw including: a) a shank adapted to be implanted in a bone at a lower end and having an upper end configured to be captured by a separate retainer structure, the upper end having an internal shank driving structure on a top portion thereof;b) a receiver structure located at the shank upper end; the receiver having a first pair of upright arms with top surfaces forming a channel therebetween adapted to receive a connecting member, the shank upper end and retainer structure adapted to pivot together with respect to the receiver;c) a lower compression member positioned in the receiver and having a second pair of upright arms aligned with the first pair so as to be able to receive the connecting member therebetween, wherein the second pair of arms extend above a top surface of the connecting member, the lower compression member configured to engage the retainer structure; andd) a closure comprising of a threaded closed outer ring fastener and a closed inner set screw, the inner set screw having an internal lower tool abutment surface near a bottom thereof, the outer ring fastener having a continuous wound external thread and a top surface and being threadably securable to an inner surface of the receiver upright arms and the closed outer ring fastener top surface having a plurality of transverse slots to provide driving surfaces for an installation tool; the closure inner set screw including an internal central drive structure and being threadably received in a threaded bore in the closed outer ring fastener;wherein when the closed outer ring fastener is tightened downward, the outer fastener engages the compression member second pair of upright arms and the inner set screw cooperates to apply a downward force to the connecting member so as to independently lock the connecting member in position relative to the receiver, wherein the closure is entirely received within and between substantially an entire elevation of opposed outer surfaces on the first pair of upright arms. 12. The screw according to claim 11, wherein the inner set screw further comprises a lower bore communicating with an exterior flat bottom surface of the inner set screw. 13. The screw according to claim 11, wherein the first pair of upright arms of the receiver have a pair of opposed horizontal radiused grooves near the top surfaces thereof. 14. A medical implant bone screw including: a) a shank adapted to be implanted in a bone at a lower end and having an upper end;b) a receiver structure located at the shank upper end; the receiver having a first pair of upright arms with a top surface forming a channel therebetween adapted to receive a connecting member;c) a compression insert including a body located below the connecting member and a second pair of upright arms extending beside and above the connecting member wherein the upright arms have top surfaces; andd) a closure having a closed outer ring fastener with an outer thread and an inner set screw; the outer ring fastener having a continuously wound outer thread and being threadably securable to an inner side of the first pair of upright arms; the closed outer ring fastener, when rotatably advanced, applying downward force to the top surfaces of the compression insert second pair of upright arms so as to independently lock the position of the shank relative to the receiver; the closure inner set screw including a continuous outer surface guide and advancement thread substantially from a top to a bottom thereof and an aperture with a central axis opening onto a flat top surface of the inner set screw, the aperture having multi-surfaced drive surfaces and terminating at an interior tool engagement abutment surface near a bottom thereof, the tool engaging abutment surface having a central axial bore communicating with the exterior terminating on a substantially flat bottom surface of the inner set screw, the inner set screw being threadably received in a threaded bore in the closed outer ring fastener such that the inner set screw top surface is positioned so as to not extend above the top surface of the receiver upright arms and when rotatably advanced operably applies a downward force to the connecting member so as to lock the connecting member in position relative to the receiver. 15. The bone screw according to claim 14, wherein the outer fastener includes traverse slots on the top surface thereof. 16. A polyaxial bone screw having a shank for implanting in a bone, a receiver with a cavity that operably receives an upper portion of the shank and a first pair of upward extending arms forming a channel therebetween adapted to receive a connecting member, the first arms having top surfaces, a compression insert operably positioned above an upper end of the shank and including a second pair of upward extending arms that extend around and above the connecting member when the connecting member is in the channel, the closure including: a) a threaded closed outer ring fastener having a through bore with an internal surface guide and advancement thread and being positioned between the first pair of arms of the receiver such that a top surface of the outer ring fastener is substantially flush with the top surfaces of the receiver first pair of arms, and wherein the threaded closed outer ring fastener is configured to engage the insert arms;b) an inner set screw having a continuous outer surface guide and advancement thread and a central multi-surfaced drive aperture opening onto a flat top surface of the inner set screw, the aperture terminating at a lower interior tool engagement abutment surface located near a bottom thereof, the inner set screw having a flat bottom surface. 17. The closure according to claim 16, wherein the outer fastener engages the compression insert second pair of arms to provide for downward application of force to the shank from the insert to allow independent locking of the shank relative to the receiver without locking the position of the connecting member relative to the receiver. 18. A polyaxial bone screw having a shank for implanting in a bone, a receiver with a cavity that operably receives an upper portion of the shank and a first pair of upward extending arms forming a channel therebetween adapted to receive a connecting member, the first pair of arms having top surfaces, a compression insert operably positioned above and in direct sole locking contact with an upper end of the shank and including a second pair of upward extending arms with top surfaces that extend around and above the connecting member when the connecting member is in the channel, and a closure, the closure including: a) a threaded closed outer ring fastener having a through bore with an internal surface guide and advancement thread and being positioned entirely between the arms of the receiver such that a top surface of the outer fastener is substantially flush with the top surfaces of the receiver first pair of arms, the closed outer ring fastener configured to engage the second pair of arms of the insert;b) an inner set screw having a fully continuous outer surface guide and advancement thread, the inner set screw being threadedly received in the bore of the closed outer ring fastener;c) the inner set screw in a final position located beneath the top surfaces of the first pair of arms of the receiver. 19. The closure according to claim 18, wherein the outer fastener engages the compression insert second pair of arms to provide for downward application of force to the shank from the insert to allow independent locking of the shank relative to the receiver without locking the position of the connecting member relative to the receiver. 20. The closure according to claim 18, wherein a bottom surface of the inner set screw is flat, and the inner set screw includes a completely internal drive structure with a lower interior tool abutment surface near a bottom thereof. 21. A medical implant assembly including: a) a closure including a closed outer ring fastener and an inner fastener; wherein:b) the closed outer ring fastener includes a base with a first outer surface having a first splay resisting continuously wound outer guide and advancement structure thereon, a closed inner bore having an internal guide and advancement structure thereon, and a bottom surface joining the first outer surface and the inner bore, the bottom surface configured to engage a compression member included within the implant assembly;c) the inner fastener is located within the closed inner bore and includes a second outer surface having a second fully continuous outer guide and advancement structure thereon, the second outer guide and advancement structure being sized and shaped so as to rotatingly mate with the continuous internal guide and advancement structure of the closed outer ring fastener, and a lower surface portion that is substantially flat; andd) the inner fastener having a central upwardly opening internal drive structure with a lower interior tool abutment surface located near a bottom thereof. 22. A polyaxial bone screw assembly having: a) a shank for implanting in a bone;b) a receiver with a cavity that operably receives an upper portion of the shank and a first pair of upward extending arms forming a channel therebetween sized and shaped to receive a connecting member;c) a lower compression insert having a body operably positioned under the connecting member when the bone screw is fully assembled and having a second pair of upward extending arms with top surfaces that extend around and above the connecting member when the connecting member is located in the channel, the insert applies a force to lock the shank; andd) a closure for closing the channel between the receiver arms, the closure including a closed outer ring fastener having a continuously wound external thread form and a plurality of transverse slots on a top surface thereof to provide driving surfaces for an installation tool and an inner set screw threadedly received in an axial bore of the closed outer ring fastener, the inner set screw having a central tool drive structure contained within a body of the inner set screw and only opening onto a top thereof, and a lower interior tool abutment surface, the closed outer ring fastener engaging the lower compression insert second pair of arms to provide for downward application of force from the insert to lock the shank so as to allow independent locking of the shank relative to the receiver without locking the position of the connecting member relative to the receiver; the closure having a final orientation wherein the closure outer fastener engages the insert and locks the position of the shank relative to the receiver and the closure inner set screw urges downwardly to lock the position of the connecting member relative to the receiver. 23. The improvement according to claim 22, wherein the closure outer fastener has a top surface that is substantially flush with a top surface of the first pair of upright arms of the receiver. 24. In a polyaxial bone screw having a shank for implanting in a bone; a receiver with a cavity that operably receives an upper portion of the shank and a first pair of upward extending arms forming a channel therebetween sized and shaped to receive a connecting member; a lower compression insert having a body operably positioned under the connecting member when the bone screw is fully assembled and having a second pair of upward extending arms that extend around and above the connecting, member when the connecting member is located in the channel and a closure for closing the channel between the receiver arms; the lower compression insert operably applying a force to lock the shank; the closure including a closed outer ring fastener and an inner set screw threadedly received into a bore of the closed outer ring fastener, the closed outer ring fastener engaging the lower compression insert arms to provide for downward application of the force to allow independent locking of the shank relative to the receiver without locking the position of the connecting member relative to the receiver; the closure having a final orientation wherein the closure closed outer ring fastener engages the insert and locks the position of the shank relative to the receiver and the closure inner set screw urges downwardly to lock the position of the connecting member relative to the receiver, the improvement wherein: a) the inner set screw has an internal drive structure with a lower interior tool abutment surface and a body with an external surface having a continuous thread form near a top to near a bottom thereof, and wherein the top has a substantially flat surface without a drive structure and the drive structure is spaced inwardly with respect to external threads of the inner set screw.
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