Patent ID: 9380986
Filing Date: 2016-07-05
CPC Classification: A61B,A61C

Claim Text:
1. A method for generating a digital surface model depicting an interface between an impression material and another material from volumetric data including image data of a physical impression of an intra-oral anatomy, the method comprising without reliance on optical scanning: acquiring information defining predetermined dimensions of a recess or a hole in the impression material, said recess or hole being created in the impression material prior to its hardening by inserting a calibration tool having the predetermined dimensions; acquiring CT scanning results of said recess or hole in the hardened impression material; using said information defining the predetermined dimensions and said CT scanning results of said recess or hole to determine a threshold value for an interface between the impression material and the other material; acquiring CT scanning results of the physical impression of an intra-oral anatomy, the impression being made in the same impression material as the recess or hole; and using said threshold value in generating a surface of said impression of an intra-oral anatomy from said scanning results of said impression of an intra-oral anatomy.