열연화시킨 근관충전방법에 따른 근단폐쇄성에 관한 연구
A COMPARISON OF THE APICAL SEALING ABILITY OF OBTURATION TECHNIQUES BY THERMALLY SOFTENED GUTTA PERCHA
백승호,
소속 상세정보
백승호 ( ) - 서울대학교 치과대학 치과보존학교실
KMID : 0362319980230020607
Abstract
The purpose of this study was to evaluate the apical sealing ability of lateral condensation method, vertical condensation method, and MicroSeal obturation system.
Sixty-four extracted anterior teeth were instrumented to #40 using Profile. Three groups of 20 teeth were obturated by lateral condensation technique, vertical condensation technique, and and MicroSeal obturation system. Control group were not obturated. Teeth were immersed in resorcinol-formaldehyde resin for 5 days at 4℃, and the resin was allowed to polymerize completely for 4 days at room temperature. Teeth were ground horizontally at 1.5mm ( level 1), 2.5mm ( level 2), and 3.5mm ( level 3) from the anatomic apex and examined with a stereomicroscope at X40 magnification. The photographs were taken a at X40 magnification of the filling in each level and scanned. The leakage area, which was filled with the resin, was measured at each of the three levels. Each ratio of leakage was evaluated by calculating the ratio of thearea of the resin to the total area of the canal and was analyzed statistically.
The results were as followed :
1. Vertical condensation group had significantly higher percentage of the area which was obturated by gutta percha than other two technique at each level.
2. At the level 1, there was the greatest leakge in the lateral condensation group, but there
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