Lewis Amitha J, Boaz Karen, Nagesh K R, Srikant N, Gupta Neha, Nandita K P, Manaktala Nidhi
Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, Manipal University, Manipal, Karnataka, India.
Department of Forensic Medicine, Father Muller Medical College Hospital, Mangalore, Karnataka, India.
J Forensic Dent Sci. 2015 May-Aug;7(2):153-7. doi: 10.4103/0975-1475.155081.
The primary aim of the following study is to estimate the chronological age based on the stages of third molar development following the eight stages (A to H) method of Demirjian et al. (along with two modifications-Orhan) and secondary aim is to compare third molar development with sex and age.
The sample consisted of 115 orthopantomograms from South Indian subjects with known chronological age and gender. Multiple regression analysis was performed with chronological age as the dependable variable and third molar root development as independent variable. All the statistical analysis was performed using the SPSS 11.0 package (IBM ® Corporation).
Statistically no significant differences were found in third molar development between males and females. Depending on the available number of wisdom teeth in an individual, R (2) varied for males from 0.21 to 0.48 and for females from 0.16 to 0.38. New equations were derived for estimating the chronological age.
The chronological age of a South Indian individual between 14 and 22 years may be estimated based on the regression formulae. However, additional studies with a larger study population must be conducted to meet the need for population-based information on third molar development.
以下研究的主要目的是根据德米尔坚等人的八阶段（A至H）方法（以及两种修改方法——奥尔汉方法），基于第三磨牙发育阶段来估计实足年龄，次要目的是比较第三磨牙发育与性别和年龄的关系。
样本包括115张来自南印度受试者的全景X线片，这些受试者的实足年龄和性别已知。以实足年龄作为因变量，第三磨牙牙根发育作为自变量进行多元回归分析。所有统计分析均使用SPSS 11.0软件包（IBM®公司）进行。
在男性和女性的第三磨牙发育方面，统计学上未发现显著差异。根据个体中智齿的可用数量，男性的R（2）值在0.21至0.48之间变化，女性的R（2）值在0.16至0.38之间变化。推导了用于估计实足年龄的新方程。
可以根据回归公式估计14至22岁南印度个体的实足年龄。然而，必须进行更多有更大研究人群的研究，以满足基于人群的第三磨牙发育信息的需求。
