Patent ID: 9603683
Date: 2017-03-28
CPC Classifications: A61C,B29C,B29L,C04B

Claim:
1. A method for producing a dental restoration (D) by CAD casting, comprising: a) recording three-dimensional, digital data of a dentition or of a part of a dentition of a patient; b) creating a virtual dental restoration (VD) using the recorded three-dimensional, digital data; c) selecting an embedding compound to be used to create a model (M) from the virtual dental restoration (VD); d) determining a linear setting expansion factor of the selected embedding compound; e) selecting a casting material (GM) to be used to create the dental restoration (D) from the model (M); f) determining a coefficient of thermal expansion of the selected casting material; g) virtually expanding the virtual dental restoration (VD) relative to the recorded dentition data based on the determined linear setting expansion factor and the determined coefficient of thermal expansion; h) preparing the model (M) using the virtually expanded virtual dental restoration; i) embedding the model (M) in the selected embedding compound (EM); j) hardening the embedding compound (EM) and removing the model (M), so that a casting mold is obtained; k) filling the casting mold with the selected casting material (GM) and cooling the casting material (GM) such that the dental restoration (D) is obtained.