PROBLEM TO BE SOLVED: To provide a ceramic body for dental prosthesis capable of being accurately positioned to a holding tool in cutting work by facilitating check of a peripheral edge direction thereof and positioning of the ceramic body for the dental prosthesis with respect to the holding tool of a CAD/CAM processing device.SOLUTION: The ceramic body for dental prosthesis is composed of a ceramic material, is molded into a circular, planar and disk-like external shape, and has a diameter of 50 mm or more, where a projecting component is attached to at least a part of a peripheral edge of a circular part with the diameter. Further, a recess for ending the projecting component in the peripheral edge direction is formed thereon, at least one or more recesses are formed, and the formed recesses are served as marks representing the direction of the external shape.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】CAD/CAM加工装置の保持具に対して歯科補綴用セラミックス体の周縁方向の確認と位置決めが容易となり、切削加工時に保持具に対して正確に位置決めする事が可能となる歯科補綴用セラミックス体を提供する。【解決手段】歯科補綴用セラミックス体はセラミック材料から成り、円形の平面形状で円盤状の外形形状に成形され、50mm以上の直径を有し、その直径を有する円形部の周縁の少なくとも一部に凸部品が取り付けられている。更に、凸部品を周縁方向で途切れさせる凹部が形成されていると共に、凹部が少なくとも一箇所以上形成されており、形成された凹部が、外形形状の方向を示す印である。【選択図】図1
