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《Journal of Modern Stomatology》 2009-03
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Comparison between two types of rotary NiTi instruments in root canal preparation:a clinical study

GUO Huijie,LIANG Yuhong,WANG Jiade. Department of Stomatolog,People's Hospital,Peking University,Beijing 100044  
Objective To evaluate clinical effects of two types of NiTi rotary instruments Hero642 and Mtwo in preparation of molars' root canals.Methods Root canal preparatory of sixty molars with pulpitis or periodontitis was performed by Hero642 with crown-down technique and Mtwo with modified step-back technique. All the root canals were obturated with lateral condensation method. The efficiency of preparation was analyzed by radiographs before and after treatment. The operating time and the incidence of complications were recorded.Results Two types of instruments could keep the original curvature and flow of the root canals. Mtwo could achieve better tapered canal as to be easily irrigated and obturated. The operating time of Hero642 was shorter than that of Mtwo. Two pieces of Mtwo were separated,whereas no Hero642 was separated.Conclusion Mtwo instrument showed better shaping ability,whereas Hero642 instrument was time-saving,safer and much lower cost.
【CateGory Index】: R781.05
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