PROBLEM TO BE SOLVED: To provide a method for producing a dental treatment implement, a support material for the dental treatment implement, and the dental treatment implement, preventing leakage of a photopolymerization CR (Composite Resin) injected in time of cavity recovery, facilitating treatment of a cavity, and allowing the cavity recovery where contact of contact points between a counter part of a treatment-needing tooth and an adjacent tooth is certain.SOLUTION: In this method for producing the dental treatment implement, the dental resin is filled in the whole region or a partial region inside a recessed part formed in the tape-like support material capable of being held against the periphery of the cavity, and the dental resin is cured to mold a small piece capable of being stored inside the cavity inside the recessed part. In this case, after molding the small piece inside the recessed part, a part of the support material and a part of the recessed part are separated in the longitudinal width direction and are removed, and a lower part of the small piece is left inside the left residual recessed part of the residual support material to project an upper part of the small piece above the residual recessed part. The tape-like support material capable of being held against the periphery of the cavity is formed with the recessed part. In the support material for the dental treatment implement, the recessed part has a shape and a size where the small piece capable of being stored in the cavity of the treatment-needing tooth is molded when filling and curing the dental resin.COPYRIGHT: (C)2013,JPO&INPIT【課題】 窩洞回復時に注入する光重合型CRの漏洩を防止でき、窩洞の治療が容易で、要治療歯の豊隆部と隣接歯の接触点の接触が確実な窩洞回復ができる歯科用治療具の製造方法、歯科用治療具用支持材、歯科用治療具を提供する。【解決手段】 窩洞の外周に宛がうことのできるテープ状の支持材に形成された凹部内の全域又は一部の領域に歯科用レジンを充填し、その歯科用レジンを硬化させて、前記凹部内で、窩洞内に収容可能な小片を成型する歯科用治療具の製造方法である。この場合、凹部内で小片を成型してから、支持材及び凹部の一部を縦幅方向に分離して除去し、残された残余支持材の残余凹部内に小片の下部を残し、小片の上部を残余凹部の上方に突出させることができる。窩洞の外周に宛がうことのできるテープ状の支持材に凹部が形成され、その凹部は歯科用レジンを充填してその
