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-0374439 (2011-12-29) |
등록번호 | US-9980753 (2018-05-29) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 2 인용 특허 : 468 |
A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A friction fit compression inse
A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A friction fit compression insert (some with lock and release feature), a planar split retaining ring and a shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled and the receiver and insert may include aligned tool receiving apertures for lock and release of the polyaxial mechanism.
1. A bone anchor assembly for securing a longitudinal connecting member to a bone, the bone anchor assembly comprising: a receiver having a through bore around a central vertical axis, the receiver including a lower body with a bottom opening and an internal cavity communicating with an upper portio
1. A bone anchor assembly for securing a longitudinal connecting member to a bone, the bone anchor assembly comprising: a receiver having a through bore around a central vertical axis, the receiver including a lower body with a bottom opening and an internal cavity communicating with an upper portion having a pair of opposed arms defining a first channel therebetween opening onto a top thereof, the first channel having opposed inner surfaces and a transverse axis perpendicular to the central vertical axis, the first channel sized and shaped for receiving a portion of the longitudinal connecting member, the arms having a discontinuous helically wound guide and advancement structure thereon, and the receiver including interior opposed recesses having downwardly-facing top surfaces located entirely below the helically wound guide and advancement structure;a bone attachment structure having a body and an upper head portion having a substantially spherical surface above a hemisphere thereof, the body extending through the receiver bottom opening and pivotal with respect to the receiver; andan insert having a body with upright arms forming a second channel therebetween, the second channel being alienable with the receiver transverse axis to receive the portion of the longitudinal connecting member, the upright arms having uppermost top surfaces, the insert body further including a central through-and-through tool receiving opening and oppositely-directed opposed radial extending portions with outer surfaces in the direction of the receiver transverse axis engageable with the receiver first channel inner surfaces to inhibit rotation between the receiver and the insert, the opposed radial extending portions having top surfaces that extend radially outward and underneath a most bottom surface of the portion of the longitudinal connecting member positioned within the receiver first channel,wherein when the uppermost top surfaces of the upright arms of the insert are snapped under and engaging the downwardly-facing top surfaces of the receiver opposed recesses, the bone attachment structure has a non-floppy relationship with respect to the receiver, and the insert is prevented from moving back up within the receiver prior to the longitudinal connecting member being positioned within the receiver and the insert first and second channels and locked by a closure structure. 2. The bone anchor assembly of claim 1, wherein the insert upright arms further include upper portions projecting radially outward near the uppermost top surfaces thereof, with the top surfaces of the radially-projecting upper portions defining the uppermost top surfaces of the insert. 3. The bone anchor assembly of claim 1, wherein the bone attachment structure upper head portion is held in the receiver cavity by a separate retainer. 4. The bone anchor assembly of claim 1, wherein the insert body is above the bone attachment structure upper head portion so as to cooperate in providing a friction fit between the bone attachment structure and the receiver. 5. The bone anchor assembly of claim 1, wherein the bone attachment structure is positioned within the receiver prior to the insert uppermost top surfaces being snapped under the downwardly-facing top surfaces of the receiver opposed recesses. 6. The bone anchor assembly of claim 3, wherein the retainer is non-pivoting with respect to the receiver. 7. The bone anchor assembly of claim 1, wherein the insert further includes a lower extending portion in the direction of the bone attachment structure upper head portion so as to provide a friction fit with respect to the bone attachment structure and the receiver. 8. The bone anchor assembly of claim 1, wherein the closure structure has a corresponding continuous helically wound structure engageable with the discontinuous helically wound guide and advancement structure. 9. The bone anchor assembly of claim 8, wherein the closure structure is configured to abut the longitudinal connecting member positioned in the receiver first channel. 10. The bone anchor assembly of claim 8, wherein the closure structure corresponding continuous helically wound structure is threadably engagable with the discontinuous helically wound guide and advancement structure, thereby advancing the closure structure into the receiver first channel upon rotation of the closure structure relative to the receiver. 11. The bone anchor assembly of claim 8, wherein the closure structure remains spaced apart from the insert when the bone anchor assembly is in a locked configuration. 12. The bone anchor assembly of claim 1, wherein the receiver discontinuous helically wound guide and advancement structure inhibits the receiver arms from splaying open at the top thereof. 13. The bone anchor assembly of claim 1, wherein a width of the insert second channel at the level of the uppermost top surfaces of the insert upright arms, as measured perpendicular to both the transverse axis and the central vertical axis, is greater than a diameter of the longitudinal connecting member. 14. The bone anchor assembly of claim 1, wherein a length of the insert second channel between outer ends of the opposed radial extending portions, as measured along the transverse axis, is greater than the greatest width between inner surfaces of the insert upright arms forming the second channel therebetween, as measured perpendicular to both the transverse axis and the central vertical axis. 15. The bone anchor assembly of claim 1, wherein the insert uppermost top surfaces do not extend above a top of the longitudinal connecting member positioned within the receiver first channel and the insert second channel when the bone anchor assembly is in a locked configuration. 16. The bone anchor assembly of claim 1, wherein the insert body and upright arms together form a saddle surface that defines a lower limit of the insert second channel, andwherein top surfaces of the opposed radial extending portions extend the saddle surface in the direction of the transverse axis so as to be underneath the portion of the longitudinal connecting member positioned within the insert second channel. 17. The bone anchor assembly of claim 1, wherein the insert has a non-snap-fit engagement with the portion of the longitudinal connecting member positioned within the insert second channel. 18. The bone anchor assembly of claim 1, wherein bottom surfaces of the insert opposed radial extending portions overlie a receiver channel surface defined by an upper edge of the receiver body extending between the receiver arms. 19. The bone anchor assembly of claim 1, wherein the insert upright arms are snapped into the receiver opposed recesses after the bone attachment structure upper head portion is disposed within the receiver internal cavity. 20. The bone anchor assembly of claim 1, wherein the insert upright arms further include upper portions that flair radially outward and vertically upward, with the top surfaces of the upper portions defining the uppermost top surfaces of the insert. 21. The bone anchor assembly of claim 1, wherein the insert opposed radial extending portions top surfaces are opposite a lower most bottom facing surface of the portion of the longitudinal connecting member positioned within the receiver first channel. 22. The bone anchor assembly of claim 1, wherein the insert upright arms have exterior surfaces with a maximum width therebetween and the radial extending portions have a maximum length, as measured along the transverse axis, that is great than the maximum width. 23. A bone anchor assembly for securing a longitudinal connecting member to a bone, the bone anchor assembly comprising: a receiver having a through bore around a central vertical axis, the receiver including a lower body with a bottom opening and an internal cavity communicating with an upper portion having a pair of opposed arms defining a first channel therebetween opening onto a top thereof, the first channel having a transverse axis perpendicular to the central vertical axis, the first channel sized and shaped for receiving a portion of the longitudinal connecting member, the arms having a discontinuous helically wound guide and advancement structure thereon, and the receiver including interior opposed recesses having downwardly-facing top surfaces located entirely below the helically wound guide and advancement structure;a bone attachment structure having a body and an upper head portion with a substantially spherical surface above a hemisphere thereof, the body extending through the receiver bottom opening and pivotal with respect to the receiver; andan insert having a body with upright arms forming a second channel therebetween, the second channel being alignable with the transverse axis to receive the portion of the longitudinal connecting member therein, the upright arms having uppermost top surfaces, the insert body further including a central through-and-through tool receiving opening and oppositely-directed opposed radial extensions in the direction of the transverse axis to extend a second channel supporting surface for the longitudinal connecting member in the direction of the transverse axis, the opposed radial extensions having top surfaces that extend radially outward and underneath a most bottom surface of the portion of the longitudinal connecting member, the extensions inhibiting rotation of the insert with respect to the receiver,wherein after the bone attachment structure upper head portion is positioned within the internal cavity, the uppermost top surfaces of the upright arms are snapped under the downwardly-facing top surfaces of the receiver opposed recesses to prevent upward movement of the insert when the insert is fully disposed within the receiver first channel, so as to prevent the insert from moving back up within the receiver prior to the assembly being put into a locked orientation with a closure. 24. The bone anchor assembly of claim 23, wherein the insert body and upright arms together form a saddle surface that defines a lower limit of the insert second channel, andwherein the top surfaces of the opposed radial extensions extend the saddle surface in the direction of the transverse axis so as to be underneath the portion of the longitudinal connecting member positioned within the insert second channel. 25. The bone anchor assembly of claim 24, wherein the opposed radial extensions have lateral surfaces to engage an inner sidewall surface of the receiver arms so as to block rotation between the insert and the receiver. 26. The bone anchor assembly of claim 23, wherein a length of the insert second channel between outer ends of the opposed radial extensions, as measured along the transverse axis, is greater than the greatest width between inner surfaces of the insert upright arms forming the second channel therebetween, as measured perpendicular to both the transverse axis and the central vertical axis. 27. The bone anchor assembly of claim 23, wherein the insert upright arms further include upper portions that flair radially outward and vertically upward, with the top surfaces of the upper portions defining the uppermost top surfaces of the insert. 28. The bone anchor assembly of claim 23, wherein the closure has a corresponding continuous helically wound structure engageable with the discontinuous helically wound guide and advancement structure. 29. The bone anchor assembly of claim 23, further comprising a resilient retainer located in the cavity, the retainer being expandable in the cavity about the bone attachment structure upper head portion and receiving the upper head portion therethrough to capture the upper head portion in the cavity, the bone attachment structure being pivotable with respect to the retainer prior to locking of the bone attachment structure with respect to the receiver. 30. A bone anchor assembly for securing an elongate rod to a bone, the bone anchor assembly comprising: a receiver having a vertical axis, a lower body defining an internal cavity communicating with a bottom surface of the receiver through a bottom opening, and a first pair of upright arms extending upwardly from the lower body to define a first channel opening onto a top thereof for receiving the elongate rod, the first channel having a transverse axis perpendicular to the vertical axis and communicating with the internal cavity to define a through bore centered around the vertical axis, the upright arms having interior surfaces with a discontinuous guide and advancement structure formed therein, the receiver having opposed recesses with downwardly-facing top surfaces located entirely below the discontinuous guide and advancement structure;a bone attachment structure having a body and an upper head portion with a substantially spherical surface above a hemisphere thereof, the body extending through the receiver bottom opening and pivotal with respect to the receiver; andan insert having a body with a second pair of upright arms centered around a vertically-extending midsection of the body and forming a second channel therebetween, the second channel being alignable with the receiver transverse axis to receive the elongate rod, the insert upright arms having uppermost portions protruding laterally at the vertically-extending midsection of the insert body and terminating at uppermost top surfaces, the insert body further including a central through-and-through tool receiving opening and oppositely-directed opposed radial extensions in the direction of the receiver transverse axis to inhibit rotation between the receiver and the insert,wherein top surfaces of the insert opposed radial extensions extend radially outward so as to be underneath a most bottom surface of the elongate rod, andwherein the uppermost top surfaces of the upright arms are snapped under and engaging the downwardly-facing top surfaces of the receiver opposed recesses to prevent upward movement of the insert when the insert is fully disposed within the receiver first channel, so as to prevent the insert from moving back up within the receiver prior to the insert being further pushed down within the receiver into a locked orientation by a closure. 31. The bone anchor assembly of claim 30, wherein the insert upright arm uppermost portions protruding laterally extend radially outward near the uppermost top surfaces thereof, with the top surfaces of the radially-outward protruding uppermost portions defining the uppermost top surfaces of the insert. 32. The bone anchor assembly of claim 30, wherein the bone attachment structure upper head portion is engaged in the receiver by a separate cylindrical shaped member having a central opening. 33. The bone anchor assembly of claim 30, wherein when the insert body upright arm uppermost top surfaces are snapped under and engaged with the downwardly-facing top surfaces of the receiver opposed recesses and the upper head portion of the bone attachment structure is positioned under the insert body, the insert cooperates to provide a friction fit between the bone attachment structure and the receiver. 34. The bone anchor assembly of claim 30, further comprising a resilient retainer located in the cavity, the retainer being expandable in the cavity about the bone attachment structure upper head portion and receiving the upper head portion therethrough to capture the upper head portion in the cavity, the bone attachment structure being pivotable with respect to the retainer prior to the bone attachment structure coming into the locked orientation with respect to the receiver by the closure. 35. The bone anchor assembly of claim 34, wherein the insert remains spaced from the retainer and the retainer is non-pivoting with respect to the receiver. 36. The bone anchor assembly of claim 30, wherein the insert further includes a lower extending portion in the direction of the bone attachment structure upper head portion so as to cooperate in providing a friction fit for the bone attachment structure with respect to the receiver prior to the assembly coming into the locked orientation by the closure. 37. The bone anchor assembly of claim 30, wherein the closure has a corresponding continuous helically wound structure engageable with the receiver discontinuous guide and advancement structure. 38. The bone anchor assembly of claim 37, wherein the closure is configured to abut the elongate rod received in the receiver first channel. 39. The bone anchor assembly of claim 37, wherein the corresponding continuous helically wound structure is threadably engagable with the receiver discontinuous guide and advancement structure, thereby advancing the closure into the receiver first channel upon rotation of the closure relative to the receiver. 40. The bone anchor assembly of claim 37, wherein the closure remains spaced apart from the insert when the bone anchor assembly is in the locked orientation. 41. The bone anchor assembly of claim 30, wherein the receiver discontinuous guide and advancement structure further comprises a splay resisting construction. 42. The bone anchor assembly of claim 30, wherein a width between inner surfaces of the insert second channel at the level of the uppermost top surfaces of the insert upright arms, as measured perpendicular to both the transverse axis and the vertical axis, is greater than a diameter of the elongate rod. 43. The bone anchor assembly of claim 30, wherein a length of the insert second channel between outer ends of the opposed radial extensions, as measured along the transverse axis, is greater than the greatest width between inner surfaces of the insert upright arms at their uppermost portions, as measured perpendicular to both the transverse axis and the vertical axis. 44. The bone anchor assembly of claim 30, wherein the insert uppermost top surfaces do not extend above a top of the elongate rod positioned within the receiver first channel and the insert second channel when the bone anchor assembly is in the locked orientation. 45. The bone anchor assembly of claim 30, wherein the insert body and upright arms together form a saddle surface that defines a lower limit of the insert second channel, andwherein the top surfaces of the opposed radial extensions extend the saddle surface in the direction of the transverse axis so as to be underneath the most bottom surface of the portion of the elongate rod positioned within the insert second channel. 46. The bone anchor assembly of claim 45, wherein the top surfaces of the opposed radial extensions extend the saddle surface beyond an inner sidewall surface of the receiver arms. 47. The bone anchor assembly of claim 30, wherein bottom surfaces of the opposed radial extensions overlie a receiver channel surface defined by an upper edge of the receiver body extending between the receiver arms. 48. The bone anchor assembly of claim 30, wherein the insert upright arms are snapped into the receiver opposed recesses after the bone attachment structure upper head portion is disposed within the receiver internal cavity. 49. The bone anchor assembly of claim 30, wherein the insert upright arm uppermost portions flair radially outward and vertically upward, with the top surfaces of the uppermost portions defining the uppermost top surfaces of the insert. 50. The bone anchor assembly of claim 30, wherein the insert opposed radial extensions have a top surface that is opposite a lower most bottom facing surface of the elongate rod positioned within the receiver channel. 51. The bone anchor assembly of claim 30, wherein the insert upright arms centered around the vertically-extending midsection of the insert body have exterior surfaces with a maximum width therebetween and the radial extensions have a maximum length, as measured along the transverse axis, that is great than the maximum width. 52. The bone anchor assembly of claim 30, wherein the insert engages the bone attachment structure upper head portion. 53. The bone anchor assembly of claim 30, wherein the insert has a non-snap-on engagement to receive the portion of the longitudinal connecting member therein. 54. The bone anchor assembly of claim 30, wherein the bone attachment structure has a friction fit relationship with respect to the receiver. 55. The bone anchor assembly of claim 30, wherein when the bone attachment structure upper head portion is positioned within the receiver internal cavity and the insert is positioned within the receiver and spaced above the upper head portion, the bone attachment structure has a non-floppy pivotal relationship with respect to the receiver.
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