Restorative Dentistry and Endodontics
- Volume 16 Issue 1
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- Pages.74-86
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- 1991
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- 2234-7658(pISSN)
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- 2234-7666(eISSN)
A STUDY OF ROOT CANAL SHAPE FOLLOWING CANAL PREPARATION OF VARIOUS CANAL ENLARGING INSTRUMENTS
수종 근관확대 기구를 이용한 근관 형성후의 근관형태 변화에 관한 연구
- Choi, Ho-Young (Department of Conservative Dentistry, College of Dentistry, Kyung Hee University) ;
- Min, Hyo-Kie (Department of Conservative Dentistry, College of Dentistry, Kyung Hee University)
- Published : 1991.03.25
Abstract
The purpose of this study was to evaluate the resulting root canal angulation and shape change after using various enlarging instruments. The mesial canals (120) of extracted human mandibular 1st and 2nd molars were randomly divided into 6 groups; Control, K-type me, Heliapical me, Canal Master me, sonic and ultrasonic instrumentation group. Vertical angulation of each canal was determined by a straight line through the long axis of canal and another straight line through the apical foramen to intersect at the point where the canal began to leave the long axis of the tooth. By recording and comparing the measured angles of the each set of pre-and postinstrumentation. Then, the roots were sectioned horizontally in the apical, middle, coronal thirds and the canal shapes examined, as was the mesiodistal canal diameter as it relates to the external root surface. The results were as follows: 1. Instrumentation using K-type me group resulted in the highest mean change in angulation (
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