Intervertebral implant

摘要

An intervertebral implant includes opposing upper and lower endplates that are configured to engage respective vertebral surfaces in an intervertebral space. The implant carries a plurality of bone fixation spikes that extend out from each endplate. The spikes define a plurality of outer surfaces that extend from a base to a tip. The spikes are laterally staggered, and have a height that increases along a longitudinal direction from the front toward the rear of the implant, and a define recess formed in at least one outer surfaces.

主权项

1. An intervertebral implant, comprising:
a first endplate defining a rear end, a front end spaced forward from the rear end, and laterally opposed sides that extend between the front and rear ends, the first endplate defining an outer transverse bone facing surface configured to engage a respective adjacent upper vertebral surface, an inner surface opposite the outer transverse bone facing surface in a transverse direction, and a longitudinal axis that extends centrally between the laterally opposed sides from the rear end to the front end; a second endplate defining a rear end, a front end spaced forward from the rear end, and laterally opposed sides that extend between the front and rear ends, the second endplate defining an outer transverse bone facing surface configured to engage a respective adjacent lower vertebral surface, an inner surface opposite the outer transverse bone facing surface in a transverse direction, and a longitudinal axis that extends centrally between the laterally opposed sides from the rear end to the front end; an articulating joint disposed between the first endplate and the second endplate, the joint configured to provide pivoting movement between the first endplate and the second endplate; a first bone fixation spike and a second bone fixation spike disposed on the first endplate, the first and second bone fixation spikes each extend from the outer transverse bone facing surface and are disposed on opposite sides of the longitudinal axis, wherein 1) the first endplate defines a recess that extends from a first end having a first portion that extends into the first bone fixation spike in the transverse direction and a second portion that extends into the outer transverse bone facing surface in the transverse direction, such that the recess terminates within the first endplate at a second end that is disposed between the inner surface and the outer transverse bone facing surface, and 2) the first bone fixation spike and the outer transverse bone facing surface combine so as to define an enclosed perimeter of the first end of the recess.