Intervertebral disk prosthesis
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United States of America Patent
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Oct 7, 1997
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N/A
app pub date -
Sep 14, 1994
filing date -
Sep 14, 1993
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Abstract
A disk prosthesis for replacing a damaged spinal disk has two metal half-envelopes which confine between them a compression cushion having a controlled differential compression. The structure employs a membrane or diaphragm surrounding the compression cushion in order to insure a seal between the cushion and the environment and also has an anti-expulsion system for shaping the compression cushion in order to limit the expansion of the cushion out of the volume defined by the two metal cups and the membrane.
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