Patent ID: 9078821
Filing Date: 2015-07-14
Classification: A61C,A61K,B33Y

Abstract:
1. A method for making a three-dimensional dental prosthesis, comprising the steps of: a) collecting digital information for making the prosthesis; b) providing an ink-jet printer having: c) applying one or more layers of the nonpolymerizable wax material onto a support surface to form a scaffold for the first light-curable wax-like polymerizable material; d) applying layers of the light-curable wax-like polymerizable material onto the one or more layers of the nonpolymerizable wax material to form a multi-layered, uncured dental prosthesis, each layer being formed by the ink-jet sprayer spraying the first material through a heating nozzle onto the nonpolymerizable wax material according to the digital information, the first material comprising a mixture of monomer, oligomer, and light sensitizer and being dimensionally stable in its uncured state at ambient temperature; and e) moving the curing head in the direction of the ink-jet sprayer to cure a sprayed first material thereby light-curing at least a portion of the prosthesis so that it cures to form a polymerized prosthesis made of a polymeric matrix, which alone, has a flexural modulus of at least 250,000 psi and a flexural strength of at least 5,000 psi.