9 Endodontic Instruments | 合法醫療器材資訊網

2015年1月2日—Reamersandfiles.Reamersandfilesarebyfarthemostwidelyusedrootcanalinstruments.Traditionally,thisgroupofinstrumentshasbeen ...

A variety of instruments are available for the extirpation of the pulp and the instrumentation, preparation, and obturation of the root canal. Although almost all these instruments were designed between 50 and 100 years ago, important changes have occurred in recent years with regard to their quality, efficacy, and standardization. Root canal instruments are available as hand instruments and many of them as engine-driven instruments.

Broaches and rasps. These instruments represent the oldest forms of root canal instruments (Fig. 9.1[1]). They are made from round steel wire blanks and working edges are created by cutting into the wire at an angle to its long axis and then elevating the edges of the cuts. The depth, angle, and number of cuts (barbs) will determine how th...