A STUDY ON THE CLEANSING EFFECT OF THREE ROOT CANAL INSTRUMENTS

수종(數種) 근관형성기구(根管形成器具)의 근관정화효과(根管淨化效果)에 관(關)한 실험적(實驗的) 연구(硏究)

This study was conducted to compare the chip removal capability of root canal enlarging instruments. Fifty five buccal or mesial canals from upper and lower molar teeth were randomly selected and divided into three groups; Reamer, K-type file and K-flex file. Fifteen canals in each group were individually enlarged with one of three tested instruments and irrigated with 5cc of normal saline solution. After instrumentation, each canal was dried with paper point and the canal was splited longitudinally and the cleanness of root canal surface was evaluated under stereoscope by three observers. The results were as follows; 1. Most of the canals experimented showed varying degree of the presence of debris. 2. The canals prepared with reamers showed the most clean canal surface. 3. There was no significant difference in debridement effect between k-type file and k-flexfile.