Process for producing a sintered dental prosthesis

Details Process for producing a sintered dental prosthesis Process for producing a sintered dental prosthesis

A - Human Necessities

61

C

83/27

A61C 13/00 (2006.01) A61K 6/04 (2006.01) B22F 3/10 (2006.01) C22C 1/04 (2006.01)

Patent

CA 2005410

ABSTRACT OF THE DISCLOSURE A dental prosthesis having very high density values, that is sintered from noble metal powder mixtures having a bimodal or multimodal particle size distribution is obtained when the drying and sintering processes are carried out in a specific manner. For this purpose the dried dental prosthesis produced from a slip is subjected to a thermal treatment for 5 to 45 minutes at temperatures of between 100 and 400°C, whereupon it is heated to 800°C at an average temperature increase of 50 to 300 k per minute and heated to the sintering temperatures with increases of 20 to 200 K per minute. The sintering temperature lies between (Tsolidus-200) and (Tsolidus-70), Tsolidus being the solidus temperature of the sintered alloy. The cooling process must be carried out under vacuum or under a protective gas.

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