INTERVERTEBRAL DISK ENDOPROSTHESIS Russian patent published in 1997 - IPC

FIELD: medical engineering. SUBSTANCE: device has two implantable axially symmetrical plates with ring-shaped guiding edge and concave central part. The plates have protruding fixing members on the side opposite to the concave portion. Alloplastic material disk is placed between two plates facing each other with their concavities. Disk is connected with guiding edges of each of them. Fixing members are of two types: triangular ones and T-shaped ones. The latter are manufactured from material possessing shape memory properties so that their cross-piece rotation about the pedicle axis and plate fastening in the vertebra due to longitudinal and transversal displacement as a result of phase transformation at 50-60 C. EFFECT: improved functional properties. 3 dwg