Journal of the Korean Academy of Pediatric Dentistry 2007;34(2):215-221.
Published online May 31, 2007.
AGE ESTIMATION USING PANORAMIC RADIOGRAPHS OF DEVELOPING PERMANENT TEETH
전남대학교 치의학 전문대학원 소아치과학교실, 치의학연구소 및 2단계 BK21 사업단 
발육중인 영구치의 파노라마 방사선 사진 계측을 이용한 연령 추정
최은영, 최남기, 김선미, 양규호
전남대학교 치의학 전문대학원 소아치과학교실, 치의학연구소 및 2단계 BK21 사업단
Correspondence:  , 
Abstract
The aim of this study was to test whether metric measurements of crown length, root length and apex width during tooth development could be a better basis for correlation with age than the classical methods based on subjective estimations of various stages of tooth development. Panoramic radiographs of 120 children, aged 7 to 9 years, were collected from the department of the pediatric dentistry of Chonnam National University Hospital, Korea. The methods of Mornstad was used to estimate age. The structures measured were crown length root length and apex width in panoramic radiographic. The results were as follows : 1. In the boys, it showed higher correlation between lower 2nd molar crown length, lower 1st molar root length or lower 1st permolar apical width and age. In the girls, it showed higher correlation between lower 2nd premolar crown length, lower 2nd molar root length or lower 1st molar apical width and age. 2. With the aid of a multiple regression model, a linear relationship between some of these distances and age was shown. Boy(months) = 43.958 + lower 2nd molar crown length ×4.392 + lower 1st molar root length×2.255 - lower 1st permolar apical width×2.046, Girl(months) = 75.213 + lower 2nd premolar crown length ×3.910 lower 2nd molar root length×2.280 - lower 1st molar apical width×6.217 Age was estimated in boys and girls using the mathematic model ; the mean difference between chronological and estimated ages was -2.1±6.8 months for boys and 6.1±6.2 months for girls. Therefore, it seems to be more accurate and easier than the earlier methods.
Key Words: Age estimation, Panoramic radiographs


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