Intervertebral disc endoprosthesis

Details Intervertebral disc endoprosthesis Intervertebral disc endoprosthesis

1993-03-10

1995-03-28

Isabella, David

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

606 61, A61F 244

Patent

active

054012694

ABSTRACT:
Intervertebral disc endoprosthesis with two prosthesis plates which are to be connected to the end plates of the relevant vertebrae, and with a prosthesis core which cooperates with at least one prosthesis plate via an articular surface permitting a rotational movement around the vertical axis, In order indeed to make possible a rotational movement around the vertical axis but to oppose this movement by a resistance, the articular surface forms curved arches of different average radius in the median section and in the frontal section. The radius of curvature in the sagittal section is expediently less than in the frontal section. To avoid excessive twisting it is possible to provide stops on the prosthesis plates and on the prosthesis core. These are designed, for example, as ribs and grooves which run in the median plane.

REFERENCES:
patent: 4349921 (1982-09-01), Kuntz
patent: 4759766 (1988-07-01), Buettner-Janz et al.
patent: 5258031 (1993-11-01), Salib et al.
German Search Report for DE-P 42 08 116.5.
European Search report EP 93 10 2993.

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