Anatomically contoured anterior cervical plates with bone ingrowth surfaces, providing for intersegmental compressive preloading, and a rigid and locked interface to all of the bone screws, with those engaging the vertebrae deployed in highly convergent pairs. The bone screws have a tapered self-tapping...http://www.google.ca/patents/US7704255?utm_source=gb-gplus-sharePatent US7704255 - Threadless multi-lock anterior cervical plating system
