단근 소구치의 근관계 형태에 따른 치근단부 확대기구의 크기
The apical file size according to the root canal system of premolars with single root
박미곤, 이동균, 황호길,
소속 상세정보
박미곤 ( Park Mi-Gon ) - 조선대학교 치의학전문대학원 치과보존학교실
이동균 ( Lee Dong-Kyun ) - 조선대학교 치의학전문대학원 치과보존학교실
황호길 ( Hwang Ho-Keel ) - 조선대학교 치의학전문대학원 치과보존학교실
KMID : 0353320110350020122
Abstract
Purpose: To investigate the discrepancies between the apical root canal diameter and initial apical file according to the shape of apical foramen.
Materials and Methods: Sixty extracted premolars were assigned to three groups according to the root canal system (type 1, 2, 3) of 20 teeth each. After chamber opening, the initial apical file (IAF) was inserted into root canal until the file tip was just visible through apical foramen under the microscope and fixed with methaacrylate in the root canal. The root tip was cut horizontally 1 mm from the anatomical apex and the apical cross-section was visualized using microscope at 50 magnification.
Results: 1. Mean diameter of IAF was 0.36 mm in type 1, 0.34 mm in type 2, and 0.29 mm in type 3. There were no significant differences among groups. 2. The ratio between the area of apical root canal and IAF was 40.05% in type 1, 27.05% in type 2, and 34.63% in type 3. There was a significant difference between group 1 and 2 (p<0.05).
Conclusion: The IAF of premolar was more than size 30 regardless the root canal system, and it was much smaller than real apical canal size in view of the ratio between the area of apical root canal and IAF.
키워드
Initial apical file; Apical foramen; Root canal system; Anatomical apex
원문 및 링크아웃 정보
등재저널 정보