Tooth calibration pin, used to anchor denture model - has cylindrical stem pressed in hole in model and pressurised polyoxymethylene ring to expand and grip model

摘要

The pin secures a denture model, and is used to anchor it. It can have a cylindrical stem which is pressed into a hole of the same dia. previously drilled in the model. Further pressure causes a ring of polyoxymethylene with characteristics similar to spring steel, to expand and grip the model. ADVANTAGE - No need for glue. (4pp Dwg.No.4/4)