Chemo-mechanical polishing of dentures

A - Human Necessities – 61 – C

Patent

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Details

A61C 17/00 (2006.01) A61C 17/02 (2006.01) A61C 17/16 (2006.01) B08B 3/08 (2006.01)

Patent

CA 2716324

The present disclosure relates to com-positions and methods for cleaning and polishing dentures during denture fabrication. The stone cast used to make the denture is soaked in a dissolution composition bath for a period of time, which removes the stone cast. The denture is then polished with a solvent composition, where the solvent composition includes an active solvent with low solubility toward acrylics such as polymethyl methylacrylate (PMMA), and a carrier solvent with no solubility toward acrylics. As an alternative to the solvent composition, the denture can be recovered from the stone cast and polished with a device having a robotic arm, with a substrate having a pumice stone slurry.

La présente invention concerne des compositions et des procédés permettant de nettoyer et de polir des prothèses dentaires au cours de la fabrication de ces dernières. Le moule en plâtre utilisé pour fabriquer la prothèse dentaire est trempé dans un bain d'une composition de dissolution pendant un certain temps, ce qui permet de retirer le moule en plâtre. La prothèse dentaire est ensuite polie avec une composition de solvants qui contient un solvant actif dans lequel les acryliques tels que le polyméthacrylate de méthyle (PMMA) présentent une faible solubilité, et un solvant excipient dans lequel les acryliques ne présentent aucune solubilité. En variante à la composition de solvants, la prothèse dentaire peut être retirée du moule en plâtre et polie à l'aide d'un dispositif équipé d'un bras robotisé, au moyen d'un substrat comportant une pâte de pierre ponce.

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