Acknowledgement
Supported by : 서울대학교 병원
The purpose of this study was to evaluate the efficacy and safety of ultrasonic root canal preparation technique. 55 patients treated by each of the two techniques - ultrasonic and, hand - were evaluated the complications of two root canal preparation techniques. The results were as follows: 1. There was no difference in the pain incidence between the two groups. 2. There was no formation of performation and ledge in the ultrasonic group. 3. There was no difference in the shortening of working length between the two groups.
Supported by : 서울대학교 병원