Medical substituting element for hard tissues and artificial joint
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United States of America Patent
Stats
-
Mar 9, 1999
Grant Date -
N/A
app pub date -
Apr 1, 1996
filing date -
Apr 7, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention solves a problem associated with a conventional medical substituting element for hard tissues that loosening is likely to occur after the substituting element is mounted on hard tissues, by providing the medical substituting element for hard tissues with: one or a plurality of through hole units into which fixation screws are inserted; a screw stopper for stopping the fixation screw inserted into the through hole unit at the position where the head of the fixation screw becomes lower than the upper end of the through hole unit; and a slip-off prevention member engaging unit formed in the inner wall of the through hole unit at the position higher than the screw stopper, wherein after the fixation screw inserted into the through hole unit is threaded into the hard tissues, a slip-off prevention member engages with the slip-prevention member engaging unit to ensure a slip-off prevention of the fixation screw.
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