A Clinical study of three instruments in preparation of curved root canals

Objective:To evaluate the clinical effect of K-file、ProTaper and SafeSider in preparation of curved molar root canals.Method:A total of 180 teeth which needed endodontic treatment were selected and randomly divided into 3 groups with 60 teeth in each group:K-file group、ProTaper group and SafeSider group.The root canals were prepared with 3 instruments respectively.All canals were obturated using lateral condensation technique.The efficacy of canal preparation and obturation by X-ray before,during and after operation was analyzed.Result:Statistically significant difference was found in mean working time,shaping curved molar canals and exact root canal obturation between K-file group、ProTaper group or SafeSider group.No Statistically significant difference was found in mean working time,shaping curved molar canals and exact root canal obturation between ProTaper group and SafeSider group.Conclusion:ProTaper and SafeSider tested in this study are effective and time-saving in shaping curved molar canals,it also caused less post-operative pain.The results indicated both ProTaper and SafeSider were comparable to optimally enlarge root canal.