An interbody spine implant has a PEEK body/cage and removable front, the body with bone screw holes of a diameter smaller than a greatest diameter of an associated bone screw such that received bone screws cut into the PEEK thus locking the bone screws to the body. A major diameter of a bone screw i
An interbody spine implant has a PEEK body/cage and removable front, the body with bone screw holes of a diameter smaller than a greatest diameter of an associated bone screw such that received bone screws cut into the PEEK thus locking the bone screws to the body. A major diameter of a bone screw increases towards the head of the screw to cause interference between the PEEK body and the screw. This aids in preventing the screw from backing out of the body. Bone screw holes are angled to project the bone screw from either the top or the bottom of the body for receipt in upper and lower vertebral bone. Preferably, but not necessarily, the direction of the bone screw bores are staggered from one lateral side to another lateral side of the body.
대표청구항▼
1. A spine implant comprising: a body defining a front end, a back end opposite the front end, a first lateral end, a second lateral end opposite the first lateral end, an upper side, a lower side opposite the upper side, a first notch in the first lateral end, a second notch in the second lateral e
1. A spine implant comprising: a body defining a front end, a back end opposite the front end, a first lateral end, a second lateral end opposite the first lateral end, an upper side, a lower side opposite the upper side, a first notch in the first lateral end, a second notch in the second lateral end, a first notch bore in the first notch, a second notch bore in the second notch, and a cavity situated between the upper and lower sides, the first and second lateral ends, and the front and back ends, and having a plurality of bone screw bores extending from the front end into the cavity, each one of the plurality of bone screw bores having a first diameter, and angled to project a threaded shaft of a bone screw into the cavity from either the upper side or the lower side;a first attachment pin;a second attachment pin;a front having a face, a first lateral end, a second lateral end opposite the first lateral end, a first leg extending transverse from the first lateral end and configured for receipt in the first notch of the body, a second leg extending transverse from the second lateral end and configured for receipt in the second notch of the body, a first leg bore extending through the first leg and sized to receive the first attachment pin, a second leg bore extending through the second leg and sized to receive the second attachment pin, the front removably attached to the body through receipt of the first leg in the first notch of the body and receipt of the first attachment pin into the first leg bore and the first notch bore, and the second leg in the second notch of the body and receipt of the second attachment pin into the second leg bore and the second notch bore, the front further having a plurality of bone screw holes of the first diameter and corresponding in number, placement and angle of the plurality of bone screw bores of the body; anda bone screw for each one of the plurality of bone screw bores of the body, each bone screw having a head, a neck extending axially from the head, and a threaded shaft extending axially from the neck, the neck having a second diameter that is less than the first diameter;wherein receipt of a bone screw into one of the plurality of bone screw bores of the body causes the neck to cut into the body, thereby retaining the bone screw by interference. 2. The spine implant of claim 1, wherein the body and the removable front comprise PEEK. 3. The spine implant of claim 2, further comprising: a rod bore in the body and extending from the first lateral end to the second lateral end proximate the back; anda radiographic rod disposed in the rod bore. 4. The spine implant of claim 3, wherein the removable front has a first channel in the first lateral end, and a second channel in the second lateral end, the first and second channels configured for receipt of an installation tool. 5. The spine implant of claim 1, wherein each one of the plurality of bone screw bores has an axis that is skewed relative to an axis of an adjacent bone screw bore. 6. The spine implant of claim 5, wherein the plurality of bone screw bores comprises four. 7. The spine implant of claim 6, wherein a first pair of bone screw bores of the four bone screw bores is defined having co-axial axes, and a second pair of bone screw bores of the four bone screw bores is defined having co-axial axes and that are skewed relative to the co-axial axes of the first pair of bone screw bores. 8. The spine implant of claim 7, wherein the first pair of bone screw bores have axes that angle downwardly, and the second pair of bone screw bores have axes that angle upwardly. 9. The spine implant of claim 7, wherein the first pair of bone screw bores extend from an upper area of the front end, and the second pair of bone screw bores extend from a lower area of the front end. 10. An interbody spine implant comprising: a body having a front end, a back end opposite the front end, a first lateral end, a second lateral end opposite the first lateral end, an upper side, a lower side opposite the upper side, a first notch in the first lateral end adjacent the front end, a second notch in the second lateral end adjacent the front end, a first notch bore in the first notch, a second notch bore in the second notch, a cavity situated between the upper and lower sides, the first and second lateral ends, and the front and back ends, and four bone screw bores extending from the front end and into the cavity, each one of the four bone screw bores having a first diameter and angled to project a threaded shaft of a bone screw into the cavity from either the upper side or the lower side;a first pin;a second pin;a front having a face, a first lateral end, a second lateral end opposite the first lateral end, a first leg extending transverse from the first lateral end and configured for receipt in the first notch of the body, a second leg extending transverse from the second lateral end and configured for receipt in the second notch of the body, a first leg bore extending through the first leg and sized to receive the first pin, a second leg bore extending through the second leg and sized to receive the second pin, the front attached to the body through receipt of the first leg in the first notch of the body and receipt of the first pin into the first leg bore and the first notch bore, and the second leg in the second notch of the body and receipt of the second pin into the second leg bore and the second notch bore; anda bone screw for each one of the four bone screw bores of the body, each bone screw having a head, a neck extending axially from the head, and a threaded shaft extending axially from the neck, the neck having a second diameter that is less than the first diameter;wherein receipt of a bone screw into one of the four bone screw bores of the body causes the neck to cut into the body, thereby retaining the bone screw by interference. 11. The interbody spine implant of claim 10, wherein the body and the front comprise PEEK. 12. The interbody spine implant of claim 11, further comprising: a rod bore in the body and extending from the first lateral end to the second lateral end proximate the back; anda radiographic rod disposed in the rod bore. 13. The interbody spine implant of claim 3, wherein the front has a first channel in the first lateral end, and a second channel in the second lateral end, the first and second channels configured for receipt of an installation tool. 14. The interbody spine implant of claim 10, wherein each one of the four bone screw bores has an axis that is skewed relative to an axis of an adjacent bone screw bore. 15. The interbody spine implant of claim 14, wherein a first pair of bone screw bores of the four bone screw bores is defined having co-axial axes, and a second pair of bone screw bores of the four bone screw bores is defined having co-axial axes and that are skewed relative to the co-axial axes of the first pair of bone screw bores. 16. The interbody spine implant of claim 15, wherein the first pair of bone screw bores have axes that angle downwardly, and the second pair of bone screw bores have axes that angle upwardly. 17. The interbody spine implant of claim 15, wherein the first pair of bone screw bores extend from an upper area of the front end, and the second pair of bone screw bores extend from a lower area of the front end
※ AI-Helper는 부적절한 답변을 할 수 있습니다.