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US 7,402,176 B2Granted
Intervertebral disc prosthesis
OwnerMichel H. Malekinventor
Life of this patent
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Abstract
Intervertebral disc prostheses are provided. More particularly, the invention provides disc prostheses that have adjustable disc heights, that are readily converted into fusion prostheses and that provide a range of motions that effectively mimic the natural range of motions of a spinal disc.
Claims7
An intervertebral disc prosthesis assembly comprising:
- (a) a first base plate comprising a circumferential edge, an interior surface, an exterior surface and a first threaded groove extending into the circumferential edge along the interior surface;
- (b) a second base plate disposed opposite the first base plate, the second base plate comprising a circumferential edge, an interior surface, an exterior surface, and a second threaded groove extending into the circumferential edge along the interior surface, the second threaded groove disposed opposite and facing the first threaded groove;
- and
- (c) a threaded rod that engages the first and second threaded grooves of the first and second base plates;
- wherein the interior surface of the first base plate has a first cup disposed thereon, the first cup defining a first concave surface, and the interior surface of the second base plate has a second cup disposed thereon, the second cup defining a second concave surface, and further wherein the disc prosthesis system further comprises a disc insert comprising two opposing convex surfaces disposed between the first and second concave surfaces.
2 more elements
Dependencies are inferred from the claim text.