Patent ID: 6102952
Filing Date: 2000-08-15
Classification: A61B,A61F

Abstract:
A medical substituting element for hard body tissues comprising:a member made of a medically inorganic solid material having one or a plurality of through hole units into which fixation screws are inserted, each of the one or plurality of through hole units including an integral sleeve protecting from said member;a fixation screw for each of said one or plurality of through hole units;a screw stopper surface formed in said sleeve for stopping said fixation screw inserted into said through hole unit at a position where a head of said fixation screw lies below an upper end of said sleeve;a slip-off prevention member,a slip-off preventing member engaging means for engaging said slip-off prevention member, said means formed in an inner wall of said sleeve at a position higher than said screw stopper surface;wherein in use, and after said fixation screw is inserted into said sleeve and is threaded into hard body tissues, said slip-off prevention member is engaged with said slip-off prevention member engaging means to ensure slip-off prevention of said fixation screw.