PROBLEM TO BE SOLVED: To improve accuracy and precision of 3-dimensional intraoral image data.SOLUTION: An auxiliary device (10) concerning the present invention is a dental auxiliary device that is used as an alignment criteria for making 3-dimensional intraoral image data by connecting multiple 3-dimensional image data obtained by 3-dimensionally measuring the inside of an oral cavity. The auxiliary device includes: a sheet part (11) having a first surface and a second surface facing the first surface； and multiple identification units (12) formed from the first surface of the sheet part to the thickness direction (Z-direction) of the sheet part, and having identifiable three-dimensional shapes, respectively.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】３次元口腔内画像データの正確度及び精度を向上させる。【解決手段】本発明に係る補助器具（１０）は、口腔内を３次元計測した複数の３次元画像データを繋ぎ合わせて３次元口腔内画像データを作成するための位置合わせの基準として使用される歯科用の補助器具であって、第１面と前記第１面に対向する第２面とを有するシート部（１１）と、前記シート部の前記第１面から前記シート部の厚み方向（Ｚ方向）に形成され、且つ、それぞれ識別可能な立体形状を有する複数の識別部（１２）と、を備える。【選択図】図１
