| 摘要 |
<p>An expandable intervertebral fusion implant includes a pair of semi-cylindrical shells (110) (112) having mating surfaces which resist shifting when the parts are assembled. In one embodiment of the invention, the shells (110) (112) have pillars (120)-(125) provided with teeth (126) which permit the shells to be ratcheted outward after they have been placed between spinal elements. The pillars (120)-(125) may be curved, or non-perpendicular to the shells (110) (112), so that the resulting implant is tapered, to accommodate non-parallel spinal element, and plates, thus maintaining proper spinal curvature.</p> |
