Patent ID: 8973269
Filing Date: 2015-03-10
Classification: A61C,B33Y,Y10T

Abstract:
1. A method of making a dental appliance, the method comprising: providing a first digital surface representation of a desired outer shape of a dental appliance; forming a first article of a first material having the desired outer shape based on the first digital surface representation; removing an inner portion of the first article to form an outer layer of the dental appliance comprising a cavity dimensioned to accommodate an inner layer; forming a second article by filling the cavity of the first article with a second material adapted to form the inner layer; providing a dental object having an outer shape comprising the negative of a desired inner shape of the dental appliance; acquiring a second digital surface representation of the outer shape of the dental object; and subtractively forming the desired inner shape in the second article based on the second digital surface representation to form the dental appliance having the desired inner shape and the desired outer shape.