Medical substituting element for hard tissues and artificial joi

Details Medical substituting element for hard tissues and artificial joi Medical substituting element for hard tissues and artificial joi

1996-04-01

1999-03-09

Milano, Michael J.

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

Implantable prosthesis

Bone

623 18, 411271, 411353, A61F 238

Patent

active

058793895

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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patent: 5019103 (1991-05-01), Van Zile
patent: 5534027 (1996-07-01), Hodorek
patent: 5609641 (1997-03-01), Johnson

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