Producing artificial teeth - by making suitable positive mould forming transparent negative mould, filling with photopolymerising polymer and curing it

摘要

Dental prods., and artificial teeth or their coating, in particular, made of photopolymerised polymers, are produced by first making a positive of the desired article, from this forming a negative mould in a transparent material, filling the negative mould with a liq. resin and curing it by light. The negative mould is pref. made of addition-crosslinked silicone or a polyether rubber or hydrocolloid; the positive mould is pref. made of wax. The procedure requires no processing of the (e.g.) artificial teeth made. By using the transparent negative mould the prod. is photopolymerised and assumes the precise shape required. An impression can also be taken first from natural teeth and a plaster cast made therefrom. To produce coatings a release agent can be used to prevent the polymer adhering. The negative can also be made by thermoforming a transparent film. ADVANTAGE - The prods. are made simply and quickly. They look natural and can have all the features which arise in natural teeth.