Patent ID: 8177811

Claim:
A total joint arthroplasty prosthesis allowing the guiding elements of a superjacent Va and subjacent Vb lumbar vertebrae of a spinal segment Sr of a vertebral column to be reconstructed, the prosthesis comprising: connectors ( 2 , 4 ) adapted to be fixed in pedicles Vp of the spinal levels by anchoring screws ( 3 ), upper and lower connecting elements ( 5 , 6 ) connecting the connectors ( 2 , 4 ) between each other, and guiding and damping means ( 7 ) connecting said upper and lower connecting elements ( 5 , 6 ), said guiding and damping means ( 7 ) and said upper and lower connecting elements ( 5 , 6 ) being constructed with relation to each other so there is an axis of rotation C situated at the level of the upper vertebra and that there is a sliding of this axis due to the oblong groove ( 71 ) in order to limit the stresses on the anchoring screws ( 3 ) ensuring the connectors ( 2 ) are adapted to be fixed in said superjacent vertebra (Va), wherein the prosthesis comprises limitation means ( 8 ) connecting the connectors ( 2 , 4 ) between each other and allowing the flexion extension and lateral inflexion movements around the rotation and sliding axis C to be limited.