Spinal plate positioning system including a spinal plate, centering member and implant, is used to position and center a spinal plate over an implant in an intervertebral space. Implant may include a centering feature which may engage a surface of centering member or spinal plate to aid in placement...http://www.google.fr/patents/US7815681?utm_source=gb-gplus-shareBrevet US7815681 - Orthopedic support locating or centering feature and method
Orthopedic support locating or centering feature and method