PROBLEM TO BE SOLVED: To provide an apparatus capable of evaluating quantitatively occlusal wear of a used denture.SOLUTION: An occlusal wear evaluation apparatus reads three-dimensional shape data of a denture before use and three-dimensional shape data of the denture after use, and calculates and displays a difference in physical quantities between the three-dimensional shape of the denture before use and the three-dimensional shape of the denture after use, for instance, a change amount of a relative angle between a maxillary dental arch and a mandibular dental arch, a change amount of a relative position, a change amount of the volume of the denture, and a change amount of the height of a cusp peak and the like.COPYRIGHT: (C)2013,JPO&INPIT【課題】使用した義歯の咬耗を定量的に評価できる装置を提供する。【解決手段】咬耗評価装置は、使用前の義歯の三次元形状データと使用後の義歯の三次元形状データとを読み込んで、使用前の義歯の三次元形状と使用後の義歯の三次元形状との間の物理量の差、例えば、上顎歯列弓と下顎歯列弓との相対角度の変化量、相対位置の変化量、義歯の体積の変化量、咬頭頂の高さの変化量等を算出して表示する。【選択図】図2
