Patent ID: 7754115
Filing Date: 2010-07-13
Classification: A61C

Abstract:
1. Method for fabricating a ceramo-ceramic dental prosthesis, produced from a negative mandibular impression of a patient including at least one working cavity having an interior surface conforming to the intrados of the prosthesis to be produced and formed by at least one tooth prepared by the dental surgeon to receive a prosthesis, comprising the following successive steps: a) producing a single-unit wax model by casting a wax in said working cavity of the negative mandibular impression and forming a wax root part thereof projecting above the working cavity; b) fixing a sprue that can be burned out to the summit of the root part of the single-unit wax model; c) coating the single-unit wax model and the sprue that can be burned out in a coating device; d) producing a single-unit metal model identical to the single-unit wax model by casting a metal alloy in the coating in place of the single-unit wax model and the sprue that can be burned out, the single-unit metal model therefore including a root sprue, a projecting root part and an extrados surface corresponding in positive form to the intrados of the tooth to be produced; e) applying a stripping product to the extrados surface of the single-unit metal model to prevent adhesion of the ceramic to the metal after firing the ceramic on the single-unit metal model; f) building up ceramic on the single-unit metal model covered with the stripping product, so that the ceramic has an exterior shape identical to the tooth once the prosthesis has been fitted; g) firing the ceramic carried by the single-unit metal model; h) finishing the ceramic in terms of shape and tint and removing the single-unit metal model.