To provide a facial scanning positioning structure applied to all oral non-tooth teeth.An asymmetric face plate portion (11) is defined along an X axis direction, an asymmetric side plate portion (12) is defined along a Y axis direction, an irregular main body (10) whose thickness is determined along a Z axis direction, A plurality of developing convex portions 20 distributed in predetermined positions of the asymmetric face plate portion and the asymmetric side plate portion and having a structural form protruding outwardly, a plurality of convex portions distributed in the planned surface positions of the asymmetric face plate portion and the asymmetric side plate portion, Wherein the irregular main body exhibits an asymmetric structure along any of the X axis, the Y axis, and the Z axis direction due to the plurality of developing convex portions and the plurality of concave portions In accordance with this irregular asperity difference, when planned facial scanning positioning is performed, it is possible to effectively reduce the image superimposition error in the specific axis direction, and it is easy to superimpose positional errors in each axis direction Can be observed in .BACKGROUND OF THE INVENTION【課題】全口腔無歯に適用する顔面走査位置決め構造を提供する。【解決手段】X軸方向に沿って非対称面板部11が定められ、Y軸方向に沿って非対称側板部12が定められ、Z軸方向に沿って厚さが定められる不規則状主体10と、非対称面板部及び非対称側板部の予定位置に分布し、かつ外向きに突出する構造形態を呈する複数の現像凸部20と、非対称面板部及び非対称側板部の予定表面位置に分布し、凹面状形態を呈する複数の凹部30とを備え、そのうち、複数の当該現像凸部及び当該凹部により、不規則状主体は、X軸、Y軸、Z軸方向のいずれにも沿って非対称の構造形態を呈するように構成され、この不規則の凹凸差に応じて、予定の顔面走査位置決めを行うとき、特定軸方向の画像重畳誤差を有効に減少させることができると共に、各軸方向の重畳位置誤差を容易に観察することができる。【選択図】図1
