Shivakumar Boraiah
Department of Forensic Odontology, Government Dental College and Research Institute, Bengaluru, Karnataka, India.
Dental Square Clinic, Whitefield, Bengaluru, Karnataka, India.
J Oral Maxillofac Pathol. 2021 Sep-Dec;25(3):499-502. doi: 10.4103/jomfp.JOMFP_330_20. Epub 2022 Jan 11.
Demirjian's method of dental age assessment estimates the overall dental age by scoring based on the stage of tooth formation, using panoramic radiographs. This method was primarily based on data acquired from individuals of French-Canadian origin. It has since been applied and modified for the Indian population. Therefore, the aim of the present study is to assess the reliability of the Indian formula in the population of Bengaluru.
Dental maturity of 297 subjects between 9 and 17 years was assessed using the India-specific formula of Demirjian 's 8-teeth method and the chronological age of each subject was calculated. Pearson's correlation, Independent student test/Mann-Whitney test and Chi-square test were used for statistical analysis of the results obtained.
A very strong correlation ( < 0.001) between the chronological and estimated age by Demirjian's method was obtained. The mean absolute error among the total samples was not significant and majority of the error in the estimated age was <1 year in males and females, indicating that the India specific formula gave nearly accurate estimation of the chronological age of the sample subjects.
Demirjian's Indian formula is relaible in the population of Bengaluru.
德米尔坚牙齿年龄评估方法通过基于牙齿发育阶段进行评分，并利用全景X线片来估算总体牙齿年龄。该方法主要基于从法裔加拿大人群中获取的数据。此后它已被应用于印度人群并进行了修改。因此，本研究的目的是评估印度公式在班加罗尔人群中的可靠性。
使用德米尔坚八颗牙齿方法的印度特定公式评估了297名9至17岁受试者的牙齿成熟度，并计算了每个受试者的实际年龄。对所得结果进行统计分析时使用了皮尔逊相关性、独立样本t检验/曼-惠特尼检验和卡方检验。
通过德米尔坚方法得出的实际年龄与估计年龄之间存在非常强的相关性（<0.001）。总样本中的平均绝对误差不显著，并且在男性和女性中，估计年龄的大多数误差<1岁，这表明印度特定公式对样本受试者的实际年龄给出了近乎准确的估计。
德米尔坚的印度公式在班加罗尔人群中是可靠的。
