Clinical application analysis of ultrasonic root canals irrigation in preparing molar’s curved root canals
Objective:To observe the effectiveness of preparing molar’s curved root canals using ultrasound.Methods:369 teeth with chronic pulpitis or periapical periodontitis were prepared by stainless steel K-file with the techniques of step-back technique and randomly divided into two groups.Group A: stainless-steel K file hand instrument plus ultrasonic irrigation;group B:stainless-steel K-file hand instrument plus syringe irrigation.To prepare root canal by the stainless steel K file and step-back technique.To observe the postoperative reactions on 7d return visit in the two groups.Results:The occurrence rate of postoperative reaction was 8.06% in group A and 25.14% in the group B,with significant difference between the two groups (P0.01).Conclusion:The ultrasonic irrigation after root canal preparation is more efficient in reducing postoperative reaction,which is easy to operate and beneficial to be spread in clinic.