Tooth type determining program, tooth type position determining device and method thereof

摘要

The tooth type determining program comprises extracting point groups indicating a surface of the three-dimensional profile data from input three-dimensional profile data; Shifting and / or rotating the three-dimensional profile data of a tooth belonging to a specific type of tooth; Calculating an arrangement relationship wherein an error between a point group included in any of a region of the extracted point groups and the three-dimensional profile data of the tooth becomes minimum, and estimating a direction of the tooth included in the area based on the calculated arrangement relation.