Intervertebral disc replacement prosthesis
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jun 17, 2003
Grant Date -
N/A
app pub date -
May 17, 2000
filing date -
May 17, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An implantable intervertebral disc prosthesis that comprises a disc member having an upper surface, a lower surface, and a perimeter surface. The disc includes an axis at least one slit defined in the perimeter surface; the slit being of sufficient depth and thickness to provide flexure. The slit terminates in a perimeter opening larger than the slit thickness. The perimeter opening (i.e., hole) acts as a pivot point and relieves stress. The disc prosthesis optionally comprises a cavity with an upper seat defined on the lower surface, a lower disc having an upper and lower surface and a lower seat defined on the upper surface, and a support ball. The support ball engages the seat on the upper disc and the seat on the lower disc.
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