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한국인에서의 교정치료로 인한 상악 중절치 치근 흡수에 영향을 미치는 요소

Factors affecting orthodontically induced root resorption of maxillary central incisors in the Korean population

박영국|차경석|정동화|김광원
대한치과교정학회 (The Korean Association Of Orthodontists)|2011.06|대한치과교정학회지 (The Korean Journal of Orthodontics)|제41권 제3호|pp. 174-183

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참고문헌

키워드

Root resorptionExtraction치근 흡수발치 치료치근의 형태Root shape
주제분류치의학

초록

치근 흡수는 백악질과 상아질의 부분적인 상실로 특징되어지는 상황이며, 치근의 길이 감소를 야기하고 치아의 기능에 심각한 영향을 줄 수 있다. 일반적인 병리적인 치근 흡수와 구별하여 교정치료와 관계된 치근 흡수를 orthodontically induced root resorption (OIRR)이라고 부른다. 이번 연구의 목적은 한국인을 대상으로 하여 교정 치료 후에 나타나는 치근 흡수와 관련된 환자 요인과 교정치료 요인을 찾고, 그 양상에 대해 알아보는 것이다. 판별될 요소들은 발치 치료 여부, 성별, 나이, 치근첨의 변위량과 방향, 총 치료 기간, 치아 길이, 치근의 형태였다. 이번 연구는 단국대학교 치과대학병원 교정과에서 2007년 11월부터 2008년 12월 사이에 포괄적인 교정치료가 종결된 환자의 상악 중절치를 대상으로 하였다. 선정된 대상자 수는 137명이었다. 각각의 기록은 치근단 사진과 측모 두부 방사선사진으로 구성되어졌다. 전체 대상치아에 대한 평균 치근 흡수량은 1.63 mm였으며 표준편차는 1.58 mm였다. 이변량적인 비교에서 발치 치료군에서는 2.10 ± 1.64 mm, 비발치 치료군에서는 1.18 ± 1.39 mm로 나타났다. 발치 치료 군에서 흡수량이 0.92 mm 컸으며, 통계적으로 유의한 차이를 나타냈다. 초기 치아의 길이가 길수록 흡수량이 컸으며, 4 mm 이상의 심한 치근 흡수를 보이는 그룹에서 blunt, pointed, eroded 형태의 비정상적인 치근 형태의 비율이 높았다. OIRR에 영향을 줄 수 있는 요소로 발치 여부, 초기 치아의 길이, 치근의 형태가 있었다.

Abstract

Objective: Orthodontically induced root resorption (OIRR) involves partial loss of cementum and dentin of teeth caused by routine orthodontic treatment. It decreases root length and influences the function of affected teeth. In this study, the treatment and patient factors causing apical root resorption in Koreans were determined. The observed factors were extraction, gender, age, displacement of root apex, total treatment period, total teeth length, and shape of the root. Methods: The records of 137 patients treated with full, fixed edgewise appliances were obtained from the Department of Orthodontics, Dankook University Dental Hospital, from November 2007 to December 2008. Periapical radiographs of the maxillary central incisors and cephalometric radiographs of each patient were used to assess apical root resorption and type of tooth movement. Results: The mean amount of resorption was 1.62 ± 1.58 mm. The amount of resorption in the extraction and non-extraction groups was 2.10 ± 1.64 mm and 1.18 ± 1.39 mm, respectively. The amount of root resorption increased with the total tooth length. Severe root resorption (> 4 mm) was related to abnormal root shape (blunt, pointed, or eroded). Conclusions: The variables significantly related to OIRR were extraction, initial tooth length, and root shape.

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