Patent ID: 7322980

Claim:
An osteosynthesis system for securing to adjacent first and second vertebrae, comprising: a first base plate defining a first opening adapted to receive a first vertebral engagement member for securing said first base plate to the first vertebra and a second opening adapted to receive a second vertebral engagement member for securing said first base plate to the second vertebra, said first base plate having a longitudinal axis that extends along the first and second vertebrae when said first base plate is secured to the first and second vertebrae; a connection member configured to secure said first base plate to a second base plate; a stem extending from said first base plate adapted to secure said connection member to said first base plate; a nut securing said connection member to said stem; wherein said first base plate has a vertebrae engagement surface adapted to engage the first and second vertebrae, said vertebrae engagement surface being concave along said longitudinal axis to conform with the first and second vertebrae; wherein said first vertebral engagement member includes a first screw; wherein said second vertebral engagement member includes a second screw; and wherein the first opening and the second opening are configured to give the first screw and the second screw a diverging orientation to enhance anchoring stability.