Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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AN EXPERIMENTAL STUDY ON THE EFFECT OF ULTRASONIC INSTRUMENTATION ON THE ROOT CANAL OBTURATION

Ultrasonic Instrumentation이 근관충전에 미치는 영향에 관한 연구

  • Hur, Soo-Beom (Dept. of Conservative Dentistry, College of Dentistry, Dankook University) ;
  • Hong, Chan-Ui (Dept. of Conservative Dentistry, College of Dentistry, Dankook University)
  • 허수범 (단국대학교 치과대학 치과보존학교실) ;
  • 홍찬의 (단국대학교 치과대학 치과보존학교실)
  • Published : 1991.03.25
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Abstract

The purpose of this study was to evaluate the effect of apical seal produced by ultrasonic instrumentation. 120 extracted, permanent single rooted teeth were randomly divided into 6 groups of 20 teeth and root canals were enlarged & obturated according to Table I. After canal obturation, the obturated teeth were immersed in 2.5 % Methylene blue for 72 hrs. at $37^{\circ}C$ incubator and longitudinally sectioned. The apical sealing ability was evaluated by measuring the degree of dye penetration into the canal. The results were as follows: 1. All groups showed varying depth of dye penetration. 2. There were no significant differences between Group I and N, Group II and V, Group III and VI. (P>0.05) 3. Regardless of obturation method, there were no significant differences between hand instrumented group and ultrasonic instrumented group.(P>0.05).

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