Degussa Aktiengesellschaft

Degussa Atiengesellschaft

Josef Rothaut

Werner Groll

Rudi Steinke

Angela Klaus

Jurgen Hausselt

There is provided a material for dentures having metallic matrix, containing 0.5-30 volume % glass having a softening temperature above 650.degree. C. and/or ceramic particles having a maximum grain size of 40 .mu.m.

Material for facing denture

A denture with a metallic microstructure and with low shrinkage and porosity is produced by metallurgical sintering by providing a multimodal size distribution of coarse and fine fractions of metal powder, optionally also with glass or ceramic powder, converting this powder mixture with water into a slip, modelling the denture with this, and sintering the slip at a temperature which exceeds the solidus temperature of at least one component of the powder mixture.

Process for the production of a metallic denture

Low gold dental alloys, especially for firing on dental porcelains, should be easily worked, result in no discolorations and bubble formation in the firing, and have a physiologically replaceable hardness and a low melting interval. These properties are shown by alloys having 20 to 35 wt. % gold and 45 to 65 wt. % palladium if they also contain

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Fort Lee, NJ, United States of America

Josef Rothaut