Prodn. of fully-ceramic dentures e.g. dental crowns - by embedding elastic rubber model of teeth in mass, converting model into metal casting, burning ceramic mass on model and removing metal by chemical dissolution etc.

摘要

The process comprises, producing a model of the teeth or tooth stumps to be provided with dentures from an elastic rubber mass. The model is then embedded in a mass for non-precious metal casting, followed by casting to convert the model into a metal model. A ceramic mass on the obtd. model is then burned up and the metal model is removed by chemical dissolution of the metal. The elastic rubber mass is pref. based on a polyether. USE/ADVANTAGE - Ceramic crowns etc., are produced with high precision using a combination of known techniques. The process can also be used to produce ceramic bodies from sintered ceramic