Clinical evaluation of rotary ProTaper and Mtwo instruments in curved root canals preparation

Objective:To evaluate ProTaper and Mtwo Instruments in curved Root Canals Preparation.Method:A total of 171 molars treated by root canal therapy were randomly assigned to three groups: ProTaper group,Mtwo group and K group.Wearing and tearing degree of equipment,preparation time and postoperative pain of 3 groups were also compared.Result:The average root canal preparation time of the Mtwo group was 5.4 min,significantly less than the ProTaper(6.8 min) group and the K(13.6 min).In three groups,root canals of ProTaper group and Mtwo group,could maintain the root canal anatomy in early form,and achieved good preparation results.Conclusion:Two nickel-titanium systems tested in this study are effective in the curved root canal preparation.The Mtwo instrument is much easier and faster during preparation with routine preparation technique.