Low profile intervertebral implant

摘要

The present invention is directed to a low profile intervertebral implant (10) for implantation in an intervertebral disc space (D) in-between adjacent vertebral bodies (V). The intervertebral implant includes a plate (40) preferably coupled to a spacer (20). The plate is preferably formed from a first material and the spacer is preferably formed from a second material, the first material being different from the second material. The plate is preferably sized and configured so that the plate does not extend beyond the perimeter of the spacer. In this manner, the plate preferably does not increase the height profile (hs) of the spacer and the plate may be implanted within the intervertebral disc space in conjunction with the spacer.

主权项

1. A low profile intervertebral implant sized and configured to be implanted between adjacent upper and lower vertebral bodies, the implant comprising:
a spacer having a first insertion end, a second end opposite the first insertion end, a first lateral end, a second lateral end opposite the first lateral end, an upper surface that faces the upper vertebral body when the intervertebral implant is implanted between the upper and lower vertebral bodies, a lower surface that faces the lower vertebral body when the intervertebral implant is implanted between the upper and lower vertebral bodies, the first lateral end defines a first recess, and the second lateral end defines a second recess; a plate configured to be coupled to the spacer by sliding one of the plate and the spacer relative to the other of the plate and the spacer in a direction, the plate comprising a top surface, a bottom surface, a front surface that faces the spacer when the plate is coupled to the spacer, and a rear surface opposite the front surface, wherein the rear surface defines an opening of at least one through hole that is configured to receive a bone screw to secure the implant to one of the adjacent vertebral bodies, the plate further defining a first lateral portion and a second lateral portion that each protrude relative to the front surface of the plate, each of the first and second lateral portions are configured to be inserted into the first and second recesses, respectively, to couple the plate to the spacer; and at least one cam configured to secure the plate to the spacer when the plate is coupled to the spacer, the at least one cam coupled to at least one of the plate and the spacer such that an entirety of the at least one cam is spaced from an entirety of each of the at least one through holes, and the at least one cam is rotatable with respect to the plate from a first position in which the at least one cam prevents the one of the plate and the spacer from sliding completely past the other of the plate and the spacer in the direction, to a second position in which the at least one cam does not prevent the one of the plate and the spacer from sliding completely past the other of the plate and the spacer in the direction.