하악 좌측 제3대구치 발육과 연령 사이의 연관성
Correlation of Left Mandibular Third Molar Development and Chronological Age
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참고문헌
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초록
이 연구의 목적은 하악 좌측 제3대구치의 치아 성숙도에 대한 한국인의 참고 자료를 제공하고, 하악 좌측 제3대구치의 석회화 단계와 연대기적 연령 사이의 상관관계를 분석 및 치아 발육 단계를 이용하여 연령을 예측할 수 있을지 알아보는 것이다. 연세대학교 치과대학병원에 내원한 만 7 – 23세 사이의 건강한 환자 1653명의 파노라마 방사선 사진을 이용하여 보완된 Demirjian 의 방법으로 하악 좌측 제3대구치의 발육 단계를 평가했다. 제3대구치의 석회화는 평균 9세에 시작하였으며 치관과 치근의 형성은 각각 평균 14세, 21세에 완성되었다. 치관의 형성과 치근 길이가 완성되는 발육 단계에서 남성이 여성보다 다소 빨랐으며, 그 차이는 통계적인 유의성을 보였다. 그 외의 발육 단계에서는 남성과 여성 사이의 유의미한 차이는 없었다. 하악 좌측 제3대구치과 연령은 양의상관관계를 나타냈으며, 제3대구치의 발육 단계를 이용하여 연령을 예측할 수 있었다. 파노라마 방사선 사진을 이용한 하악 좌측 제3대구치의 치아 성숙도 평가 방법을 통하여 제3대구치의 발육 시기를 분석할 수 있었고, 하악 좌측 제3대구치가 연령을 예측하는 수단으로 활용될 수 있음을 알 수 있었다.
Abstract
The aim of this study is to evaluate the development of the left mandibular third-molar development with modified Demirjian method and its relation to chronological age. A total of 1653 digital panoramic radiographs of healthy individuals aged between 7 and 23 years who visited Yonsei University Dental hospital were selected. The developmental status of the left mandibular third molars was assessed using dental maturity scoring proposed by Demirjian et al. The mean age of the first appearance of mineralization, complete crown formation, and complete root formation were around 9, 14, 21 years respectively. Statistically significant differences between males and females in the development stage of D and G were revealed that crown formation and root length completion were attained earlier in males than in females. There was significant positive relationship between age and third molar development in both sexes, and new formula was presented to estimate age of children and adolescents based on their developmental stages of third molars. In this study, the use of left mandibular third molar as a developmental marker is appropriate, and age estimation can be attained with dental maturity stage.
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