< Topic >Without making defectiveness grinding, the device and the method where efficiently it can grind revision and supplementation ones of dentistry are offered. SolutionsBeing something which is cast with lost wax process, in order for revision and supplementation ones of dentistry to extend from installation expedient at least one which consists of with revision and supplementation ones of dentistry which are connected to the point of the supuru line part and the supuru line part of the plural books which setting are done casting ones 30, vis-a-vis the casting thing installation body 9 which possesses the medial axis, in the base or supuru line part in the surface of massive base and the base which possess the surface which connects to the slope, and the slope which peter out from the peripheral edge of the base, and the base and extend to condition, after locking, the tube shape where one end opening can close casting ones, orIt possesses angular tube shape, it is buried inside grinding tank 1 where inside is filled up with abrasive G at the same time the casting thing installation body and when it agrees the medial axis of the grinding tank, around the particular medial axis it turns it exercises the casting thing installation body and the grinding tank relatively, during this rotation, it grinds revision and supplementation ones of dentistry with the abrasive. < Selective figure >Figure 1【課題】不良研磨を生じさせずに、効率的に歯科用補綴物を研磨できる装置及び方法を提供する。【解決手段】ロストワックス法によって鋳造したものであって、底面、及び底面の外周縁から先細り状にのびる斜面、及び斜面に接続する上面を有する塊状の土台と、土台の上面に植立された複数本のスプルー線部分と、スプルー線部分の先端に接続された歯科用補綴物とからなる少なくとも1つの鋳造物30を、中心軸を有する鋳造物装着体9に対し、土台またはスプルー線部分において、歯科用補綴物が装着手段から突き出すように固定した後、鋳造物を、一端開口が閉じられた筒状又は角筒状を有し、内部が研磨材Gで満たされた研磨槽1内に埋没させ、かつ鋳造物装着体および研磨槽の中心軸同士を一致させた状態で、鋳造物装着体及び研磨槽を当該中心軸のまわりに相対的に回転運動させ、この回転運動の間に、歯科用補綴物を研磨材によって研磨する。【選択図】図1
