Spinal implant system and method
View Patent ↗Embodiments of the present invention provide a spinal implant system and method. One embodiment of the present invention includes a spinal implant comprising, a first implant plate, a second implant plate, a spacer member coupled between the first implant plate and the second implant plate and an end plate coupled to the spacer member, the end plate configured to couple to adjacent vertebrae. The implant plates can include spacer channels that receive the spacer member and insertion tool channels that receive an insertion tool. Preferably, on each implant plate, the spacer channel is near the center of the plate and the insertion tool channels are on either side of the spacer channel. The spacer channels and insertion tool channels can be dovetailed or otherwise shaped to capture a portion of the spacer member and insertion tool. Mating connectors can prevent removal of the spacer member from the spacer channels.
1. A method of forming a spinal implant comprising:
inserting a first implant plate having a first spacer channel and a second implant plate having a second spacer channel in a space between adjacent vertebrae;
distracting the first implant plate and second implant plate from an initial position to a second position with an insertion tool, wherein the insertion tool comprises a first arm and a second arm, wherein the first arm of the insertion tool couples to the first implant plate, and wherein the second arm of the insertion tool couples to the second implant plate;
moving an end plate and spacer member coupled to the end plate along a portion of the insertion tool;
inserting the spacer member in the first spacer channel of the first implant plate and the second spacer channel of the second implant plate;
bringing the end plate in contact with the adjacent vertebrae, wherein the end plate is guided to the adjacent vertebrae by prongs of the first arm of the insertion tool coupled to the first implant plate and prongs of the second arm of the insertion tool coupled to the second implant plate; and
fastening the end plate to the adjacent vertebrae.
2. The method of claim 1 , further comprising:
inserting the prongs of the first arm into corresponding insertion tool channels of the first implant plate and the prongs of the second arm into corresponding insertion tool channels of the second implant plate, wherein the insertion tool channels of the first implant plate are on either side of the first spacer channel and the insertion tool channels of the second implant plate are on either side of the second spacer channel; and
positioning the end plate on the insertion tool so that the prongs inserted in the first implant plate straddle the end plate and the prongs inserted in the second implant plate straddle the end plate.
3. The method of claim 1 , wherein distracting the first implant plate and second implant plate comprises separating the first arm and second arm of the insertion tool until separation of the first arm and second arm is limited by the end plate.
4. The method of claim 1 , further comprising inserting the spacer member in the spacer member channels at least until complementary features of the first and second implant plates and the spacer member mate to inhibit removal of the spacer member.
5. The method of claim 1 , further comprising selecting at least one of the first implant member, the second implant member or the spacer member based on a desired lordotic angle.
6. The method of claim 1 , further comprising selecting the spacer member based on a desired spacing between the first implant member and the second implant member.
7. The method of claim 1 , wherein the first spacer channel is located at approximately the center of the first implant plate and the second spacer channel is located at approximately the center of the second implant plate.
8. The method of claim 1 , wherein the first spacer channel comprises sidewalls shaped to capture at least a first portion of the spacer member and the second spacer channel comprises sidewalls to capture at least a second portion of the spacer member.
9. The method of claim 1 , wherein the first spacer channel comprises dovetailed sidewalls and the second spacer channel comprises dovetailed sidewalls.
10. The method of claim 1 , wherein the spacer member comprises one or more complementary features captured by sidewalls of the first spacer channel and sidewalls of the second spacer channel when the spacer member is inserted in the first spacer channel and the second spacer channel.
11. The method of claim 1 , wherein the end plate and spacer member are an integrated piece.
12. The method of claim 1 , wherein the end plate defines a set of fastener holes including at least one fastener hole positioned to be proximate to a first of the adjacent vertebrae and a second fastener hole positioned to be proximate to a second of the adjacent vertebrae.
13. The method of 1 , wherein at least a portion of the spinal implant is formed of a biocompatible material.
14. The method of 1 , wherein a first implant plate outer surface and a second implant plate outer surface are configured to promote osseointegration.
15. The method of claim 1 , wherein the first implant plate and second implant plate are shaped to substantially conform to the shape of the adjacent vertebrae.
16. The method of claim 1 , wherein a first implant plate outer surface is sloped and a second implant plate outer surface is sloped.
17. The method of 1 , wherein the first implant plate and the second implant plate comprise holes to promote bone growth.