Patent ID: 6485493
Filing Date: 2002-11-26
Classification: A61B,Y10S

Abstract:
A fastening system comprising:a fastener element of bio-compatible radiolucent plastic material comprising a substantially disc shaped head and a shank; said shank having substantially flat first and second substantially parallel surfaces, said surfaces having ratchet teeth thereon; a substantially disc shaped lock element of bio-compatible radiolucent rigid plastic material having a through extending opening and locking teeth defining at least part of said opening, said locking teeth cooperating with said ratchet teeth to allow said shank to pass through said opening so that said head and lock element can be forced toward each other, but not allowing movement away from each other; and a plurality of ridges extending upwardly from at least one of said first and second substantially parallel surfaces adjacent said head, said ridges extending substantially perpendicular to said ratchet teeth.