Prosthetic intervertebral disc and methods for using same

Details Prosthetic intervertebral disc and methods for using same Prosthetic intervertebral disc and methods for using same

A - Human Necessities

61

F

A61F 2/44 (2006.01)

Patent

CA 2535168

Prosthetic intervertebral discs (100) and methods for using the same are described. The subject prosthetic discs (100) include upper (110) and lower (120) endplates separated by a compressible core member (130). The prosthetic discs (100) described herein include one-piece, two-piece, three-piece, and four-piece structures. The subject prosthetic discs (100) exhibit stiffness in the vertical direction, torsional stiffness, bending stiffness in the saggital plane, and bending stiffness in the front plane, where the degree of these features can be controlled independently by adjusting the components of the discs (100). The interface mechanism between the endplates (110, 120) and the core members (130) of several embodiments of the described prosthetic discs (100) enables a very easy surgical operation for implantation.

L'invention concerne des disques intervertébraux prothétiques et leurs procédés d'utilisation. Les disques prothétiques de l'invention comprennent des plaques terminales supérieure et inférieure séparées par un élément de coeur compressible. Les disques prothétiques de l'invention comprennent des structures monopièce, à deux pièces, à trois pièces et à quatre pièces. Les disques prothétiques de l'invention présentent une rigidité en sens vertical, une rigidité à la torsion, une rigidité à la flexion dans le plan sagittal et une rigidité à la flexion dans le plan avant, le degré de ces caractéristiques peut être régulé indépendamment par ajustement des constituants des disques. Le procédé d'interface entre les plaques terminales et les éléments de coeur de plusieurs modes de réalisation de disques prothétiques décrits permet une opération chirurgicale d'implantation très simple.

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