Patent ID: 8268000

Claim:
A composite interbody spacer comprising: a first portion being formed of a first material, the first portion shaped and sized for placement in an intervertebral disc space between an upper vertebral body and a lower vertebral body to separate the upper and lower vertebral bodies at a distance that provides proper spinal column function, the first portion being configured as a load bearing portion, the first portion having an upper surface shaped and sized to bear loads applied from the upper vertebral body and having a lower surface shaped and sized to bear loads applied from the lower vertebral body, the first portion having an outwardly facing front surface and having a rear surface opposing the front surface, the front surface having a first bore formed therein, the first bore having a surface shape and wherein the first bore extends at an oblique angle relative to the front surface; and a second portion being formed of a second material, at least a portion of the second portion having an outer surface shape closely matching the surface shape of the first bore and being at least partially disposed within the first bore in a manner that reinforces the first bore and in a manner to interface with a bone anchor extending through the first bore, the second portion including a second bore formed therein that is at least partially disposed within the first bore in a manner that a bone anchor can extend through the first and second bores, the second bore having an outer surface, wherein the outer surface of the second bore forms a continuous perimeter adjacent to the surface of the first bore such that the second portion substantially resists elastic yielding.