Abstract: An artificial intervertebral disc includes: an upper retaining member secured to an upper vertebra; a lower retaining member secured to a lower vertebra adjacent to the upper vertebra; and a nucleus member flexibly resiliently formed between the upper and the lower retaining members having at least an outer and an inner bellows each reinforced and integrally formed with a helical spring to define an outer annulus between the outer and inner bellows and a core formed within the inner bellows.

Abstract: An artificial intervertebral disc includes an upper retaining member secured to an upper vertebra; a lower retaining member secured to a lower vertebra adjacent to the upper vertebra; and a nucleus member rotatably coupled between the upper and the lower retaining members, with the nucleus member having at least a cushioning filler selected from: gel, foam, elastomers, and shock-absorbing materials filled, formed or pre-formed in the nucleus member for making an artificial intervertebral disc as universally oriented, stably supported, reliably manipulated and minimally invasive.

Abstract: 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.

Abstract: An artificial intervertebral disc includes: an upper retaining member secured to an upper vertebra; a lower retaining member secured to a lower vertebra adjacent to the upper vertebra; and a nucleus member flexibly resiliently formed between the upper and the lower retaining members having at least an outer and an inner bellows each reinforced and integrally formed with a helical spring to define an outer annulus between the outer and inner bellows and a core formed within the inner bellows, thereby providing an artificial intervertebral disc having nice flexibility and supporting strength to vividly simulate a natural spinal disc.

Abstract: An artificial intervertebral disc includes an upper retaining member secured to an upper vertebra; a lower retaining member secured to a lower vertebra adjacent to the upper vertebra; and a nucleus member rotatably coupled between the upper and the lower retaining members, with the nucleus member having at least a cushioning filler selected from: gel, foam, elastomers, and shock-absorbing materials filled, formed or pre-formed in the nucleus member for making an artificial intervertebral disc as universally oriented, stably supported, reliably manipulated and minimally invasive.

Abstract: A prosthetic intervertebral disc includes an upper fusion member gradually fused and secured to an upper vertebra, a lower fusion member 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 a free movement of the patient's spine and body, as safely resiliently cushioned and easily restored by the cushioning coupler in between the upper and lower fusion members.