Method for producing fully ceramic tooth elements having a...

A - Human Necessities – 61 – C

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A61C 13/083 (2006.01) A61C 13/00 (2006.01)

Patent

CA 2499772

The invention relates to a method for producing fully ceramic tooth elements having a pre-determined spatial form by means of electrophoresis. According to said method, an electroconductive chip or a chip which has been rendered conductive is arranged directly between two stumps of a working model (10, 20) or a structural element, or at a distance therefrom. Said chip (30) can comprise regions (50, 60) of different electrical conductivity and is connected to the positive pole during the electrophoresis. The inventive method can be used to produce structures for bridges, and to apply veneering material to structures. The geometric form of the different regions enables the local current strength and the local material deposition to be regulated, in such a way as to obtain a desired spatial form of the deposit. The thus produced tooth element therefore requires no further extensive secondary work, saving a considerable amount of time. Especially the application of veneering material with a brush is rendered superfluous.

L'invention concerne un procédé de fabrication par électrophorèse d'éléments dentaires entièrement composés de céramique, présentant une forme spatiale définie. Selon ledit procédé, une plaquette conductrice ou rendue conductrice, est logée directement ou à espace de deux bouts d'un modèle de travail (10, 20) ou d'un élément de structure, ladite plaquette (30) pouvant présenter des zones (50, 60) de conductivités différentes. La plaquette est reliée au pôle positif lors de l'électrophorèse. Le procédé selon l'invention permet de fabriquer des structures destinées à des bridges, et d'appliquer des matériaux de revêtement sur des structures. La forme géométrique des différentes zones permet de régler l'intensité de courant locale et la précipitation de matériau locale, de manière à obtenir une forme spatiale voulue de la précipitation. L'élément dentaire ainsi fabriqué ne nécessite par conséquent pas de gros travaux de réusinage, un gain de temps considérable étant par ailleurs obtenu. Le procédé selon l'invention permet en particulier de s'affranchir d'une application de matériau de revêtement au pinceau.

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