ANTERIOR SPINAL INSTRUMENTATION AND METHOD FOR IMPLANTATION AND REVISION

摘要

A technique for revision of a fusion construct is achieved by removing the fusion device. The fusion device is engaged by an elongated guide member (62) over which a cylindrical trephine (70) is advanced. The trephine (70) is used to extract a core (84) of bone material around the fusion device, while the guide member (62) is used to remove the bone core (84) containing the fusion device (10). In another aspect of the invention, a removal insert (90, 90') is provided that engages an implanted fusion device (10). The removal insert (90, 90') can be used to guide the trephine (70) around the fusion device, and is connected to a removal tool (100) once the bone core is created. The removal tool (100) includes a shaft (101) attached to the removal insert (90, 90'), and a slap hammer (104) slidably mounted on the shaft.