US Patent 6893465 Vividly simulated prosthetic intervertebral disc

A prosthetic intervertebral disc includes an upper fusion member adapted to be gradually fused and secured to an upper vertebra, a lower fusion member adapted to be gradually fused and secured to a lower vertebra, and a restorable cushioning coupler retained in between the upper and lower fusion members, whereby upon bending or twisting of a patient's spine, the upper and the lower fusion members may be flexibly moved with each other for enhancing free movement of the patient's spine and body, safely resiliently cushioned and easily restored by the cushioning coupler in between the upper and lower fusion members.