Inter articular disk prosthesis, comprises a spiral which is made of a metal with memory, and has spherical ends extending into the prosthesis coupling knobs

摘要

The inter articular disk prosthesis comprises spiral (3) which is made of a metal with memory, and has spherical ends (4) extending into the prosthesis coupling knobs (5). As a result of the spring force of the spiral, the coupling knobs are securely seated in the base and cover plate of the adjacent vertebras. Pimply surfaces (6) of the prosthesis promote bonding of the latter to the adjacent vertebras.