COMPUTER FABRICATION OF DENTAL PROSTHETICS

摘要

A method is disclosed to fabricate a dental prosthesis by obtaining an image of the patient's dentition and generating a three-dimensional model of the dentition; positioning a portion of the dentition into a computer model of a mill blank; defining a margin region surrounding a dental object; defining an abutment ditch outside of said margin; comparing an original scan file and an output to be produced from an original toolpath to verify the dental prothesis, and generating a new toolpath if desired; creating a milling model having two virtual portions including the margin region and the abutment ditch region; and milling the dental prosthesis with a differential speed, wherein the milling of the abutment ditch portion is done at a higher speed than the milling of the prosthesis portion.

主权项

1. A method to fabricate a dental prosthesis, comprising:
obtaining an image of the patient's dentition and generating a three-dimensional model of the dentition; positioning a portion of the dentition into a computer model of a mill blank; defining a margin region surrounding a dental object; defining an abutment ditch outside of said margin; defining an area to be milled by scrubbing the area on a surface of the dental object and allowing the user to rotate in the computer model freely and mark the surface; storing 5 axis angles as markings; comparing an original scan file and an output to be produced from an original toolpath to verify characteristics of the dental prothesis, and specifying a new toolpath by marking on a predetermined surface if more machining is needed; generating toolpath automatically on the marked area with the angle scrubbed by the user; applying a toolpath for generating a milling model having two virtual portions including the margin region and the abutment ditch region; and milling the dental prosthesis with a differential speed, wherein the milling of the abutment ditch portion is done at a higher speed than the milling of the prosthesis portion.