PROBLEM TO BE SOLVED: To provide a dental cutting instrument which can easily enlarge a space between teeth at a constant interval and thereby enables correction preparation to be performed not only at a dental office but also at home, and to provide a handpiece mounted with the dental cutting instrument and a guide instrument for using the dental cutting instrument.SOLUTION: A dental cutting instrument 10 includes: a wire saw part 20 in which abrasive grains are fastened on a wire 21 a holding part 30 which holds the wire saw part 20 in a tensioned state and a protrusion part 40 arranged at an end part of the holding part 30 in a direction in which the wire saw part 20 is tensioned. A dentist or patient grips the protrusion part 40, makes the wire saw part 20 abut between teeth, and moves the dental cutting instrument 10 in a reciprocating manner. Thereby, a portion between the teeth can be cut in a width (diameter) of the wire saw part 20.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】歯間の隙間を、等間隔で、かつ容易に拡げられることで、歯科医院だけでなく、家庭でも矯正の準備を行うことができる歯科用切削器具および歯科用切削器具を装着するハンドピース並びに歯科用切削器具を用いるための案内器具を提供する。【解決手段】歯科用切削器具10は、砥粒がワイヤ21に固着されたワイヤソー部20と、ワイヤソー部20を引張した状態で保持する保持部30と、ワイヤソー部20が引張された方向の保持部30の端部に設けられた突起部40とを備えている。歯科医師や患者は、突起部40を把持し、ワイヤソー部20を歯間に当て、歯科用切削器具10を往復移動させることで、ワイヤソー部20の幅(直径)に歯間を切削することができる。【選択図】図1
