Intervertebral disc prosthesis and method
View Patent ↗The present disclosure generally relates to an intervertebral disc prosthesis for partially or totally replacing an organic intervertebral disc. The disc prosthesis includes an interbody device, a face plate and a pair of locking mechanisms for achieving dual fixation in the cephalad and caudal direction. Methods according to the present disclosure achieve such dual fixation in a single fixation step.
1. An intervertebral disc prosthesis, comprising:
an interbody device;
a face plate adapted to engage the interbody device;
a fixation mechanism, the fixation mechanism being connected to the face plate in such a way that rotation of the face plate causes rotation of the fixation mechanism; and
an additional fixation mechanism, the additional fixation mechanism adapted to engage the face plate to thereby cause rotation of the face plate.
2. An intervertebral disc prosthesis according to claim 1 , wherein the additional fixation mechanism comprises a threaded screw.
3. An intervertebral disc prosthesis according to claim 1 , wherein the interbody device has a slot defined therein, and the face plate includes a laterally extending rod for engaging the interbody device via the slot.
4. An intervertebral disc prosthesis according to claim 1 , wherein the interbody device includes an anterior portion and a posterior portion, the interbody device being sloped from the anterior portion to the posterior portion.
5. An intervertebral disc prosthesis according to claim 1 , wherein the interbody device includes a top side and bottom side, the top and bottom sides having ridges defined therealong.
6. An intervertebral disc prosthesis according to claim 1 , wherein the interbody device comprises a face portion, the face portion being recessed and extending in an oblique manner from a top side of the interbody device.
7. An intervertebral disc prosthesis according to claim 1 , further comprising an aperture defined through a face portion of the interbody device.
8. An intervertebral disc prosthesis according to claim 7 , wherein the face plate includes a slot defined therein, the slot and the aperture being aligned when the face plate is engaged with the interbody device.
9. An intervertebral disc prosthesis according to claim 1 , wherein the interbody device includes a central opening defined therein, the opening being adapted to receive the fixation mechanism and the additional fixation mechanism.
10. An intervertebral disc prosthesis according to claim 1 , wherein the fixation mechanism comprises one or more staples integrally connected to the face plate, whereby urging of the face plate against the interbody device causes the staples to rotate into a vertebral endplate that opposes a vertebral endplate receiving the fixation mechanism.
11. An intervertebral disc prosthesis, comprising:
an interbody device having a recessed face portion, the face portion having an aperture defined therethrough;
a face plate connected to the interbody device, the face plate having a slot defined therein, the aperture and slot being aligned; and
a fixation mechanism passing through the slot and the aperture, the fixation mechanism being adapted to engage the face plate to thereby cause rotation of the face plate.
12. An intervertebral disc prosthesis according to claim 11 , further comprising an additional fixation mechanism being connected to the face plate in such a way that rotation of the face plate causes rotation of the additional fixation mechanism.
13. An intervertebral disc prosthesis according to claim 11 , wherein the face plate includes a laterally extending rod for engaging the interbody device.
14. An intervertebral disc prosthesis according to claim 11 , wherein the face plate further includes one or more fixation mechanisms integrally formed with the face plate.
15. An intervertebral disc prosthesis according to claim 11 , wherein the fixation mechanism is a screw.
16. An intervertebral disc prosthesis according to claim 11 , wherein the fixation mechanism comprises one or more staples integrally connected to the face plate, whereby urging of the face plate against the interbody device causes the staples to rotate into a vertebral endplate that opposes a vertebral endplate receiving the fixation mechanism.