Patent ID: 8844139
Filing Date: 2014-09-30
Classification: A61C,Y10T

Abstract:
1. A method of making a multilayer all-ceramic dental appliance, the method comprising: providing a first digital surface representation of a desired outer shape of a dental appliance; providing a dental blank assembly comprising a blank coupled to a support, the blank being formed of a first material, the first material comprising at least one of a glass, a glass-ceramic, a porcelain, and a ceramic; forming a first article of the blank while the blank is coupled to the support, the first article having the desired outer shape based on the first digital surface representation; providing a first assembly comprising the first article coupled to the support; removing an inner portion of the first article, while the first article is coupled to the support, to form an outer layer of the dental appliance comprising a cavity dimensioned to accommodate an inner layer; providing a second assembly comprising the outer layer coupled to the support; forming a second article by filling the cavity of the outer layer with a second material adapted to form the inner layer, the second material comprising at least one of a glass, a glass-ceramic, a porcelain, and a ceramic; providing a third assembly comprising the second article coupled to the support; and firing at least one of the first assembly, the second assembly, and the third assembly.