An apparatus and method for moving a vertebra to a desired relationship with other vertebrae and for maintaining the desired relationship. Mounting blocks are attached to the vertebrae. Pivot members are threaded onto a rod. The pivot members are received in the mounting blocks with the rod extending...http://www.google.fr/patents/US4771767?utm_source=gb-gplus-shareBrevet US4771767 - Apparatus and method for maintaining vertebrae in a desired relationship
Apparatus and method for maintaining vertebrae in a desired relationship
