Instruments and methods for preparing a spinal disc space to receive an implant include an annulus template, a footprint template, a distractor for distracting adjacent vertebrae, and a guide member for guiding a chisel. The instruments and methods can be employed in an oblique approach to the spinal...http://www.google.de/patents/US7875034?utm_source=gb-gplus-sharePatent US7875034 - Spinal disc space preparation instruments and methods for interbody spinal implants
