Prosthetic disc for intervertebral insertion
AssigneeSimplify Medical Pty Ltd
InventorsMalan De Villiers, Ulrich Hahnle
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Abstract
A prosthetic disc for insertion between adjacent vertebrae includes a core having upper and lower curved surfaces, upper and lower plates, and peripheral restraining structure on at least one of the upper plate, the lower plate and the core. Each plate has an outer surface which engages a vertebra and an inner curved surface which slides over the curved surface of the core. The peripheral restraining structure serves to hold the core against a curved surface of at least one of the plates during sliding movement of the plates over the core.
Claims16
A prosthetic disc for insertion between adjacent vertebrae, the prosthetic disc comprising:
- upper and lower plates having outer surfaces locatable against the respective vertebrae, inner surfaces, and two or more restraining structures on an inner surface of at least one of the plates, wherein at least one of the inner surfaces of the upper and lower plates is a curved inner surface;
- and
- a mobile core removable disposed between the inner surfaces of the upper and lower plates, the core arranged to slide and translate with respect to one or more of the upper or lower plates when the prosthetic disc is implanted, wherein the mobile core has a circumference;
- wherein the two or more restraining structures on at least one of the plates are projections spaced apart about the circumference of the core and discrete from one another to hold the core captive between the plates.
Dependencies are inferred from the claim text.