2Schilder H.Cleaning and shaping the root canal[J].Dent Clin North Am,1974,18:269
3Roane JB.The balanced force concept for instrumentation of curved canals[J].J Endodon,1985,11:203
4Abou-Rass M,Jastrab RJ.The use of rotary instruments as auxiliary aids to root canal preparation of molars[J].J Endod,1982,8(2):78
5Mandel E,Adib-Yazdi M,Benhamou LM,et al.Rotary Ni-Ti profile systems for preparing curved canals in resion blocks:influence of operator on instrument breakage[J].Int Endod J,1999,32(6):436
6Baumann MA,Roth A.Effect of experience on quality of canal preparation with rotary nickel-titanium file [J].Oral Surg Oral Med Oral Pathol Oral Radid Endod,1999,88(6):714
7Bryant ST,Dummer PM,Pitoni C,et al.Shaping ability of 04 and 06 taper Profile rotary nickel-titanium instruments in simulated root canals[J].Int Endod J,1999,32(3):155
8Gabel WP,Hoen M,Steiman HR,et al.Effect of rotational speed on nickel-titanium file distortion[J].J Endod,1999,25(11):752
9Esposito PT,Cunningham CJ.A comparison of canal preparation with nickel titanium and stainless steel instruments[J].J Endod,1995,21(4):173
10Lim SS,Stock CJ .The risk of perforation in the curved canal:an 2 ticurvature filing compared with the Step 2 back technique[J]. Int Endod J,1987,20(1):331