Koranne Vaishali Vasant, Mhapuskar Amit A, Marathe Swati P, Joshi Sameer A, Saddiwal Rashmi S, Nisa Shams Ul
Department of Oral Medicine and Radiology, Bharati Vidyapeeth Deemed University Dental College and Hospital, Pune, Maharashtra, India.
Department of Oral and Maxillofacial Surgery, Bharati Vidyapeeth Deemed University Dental College and Hospital, Pune, Maharashtra, India.
J Forensic Dent Sci. 2017 Sep-Dec;9(3):177. doi: 10.4103/jfo.jfds_60_16.
Age estimation from tooth coronal index (TCI) using intraoral periapical radiographs by paralleling technique based on a reduction in the size of the dental pulp cavity with advancing age as a result of secondary dentin deposition.
The aim of this study is to estimate age for Indian adults using radiographs of mandibular first molar and second premolar teeth using coronal pulp cavity index.
The study material consists of 400 intraoral periapical radiographs of mandibular second premolar and mandibular first molar from enrolled participants of either gender in the age group of 20-60 years.
Data analysis was done using SPSS (Statistical Package for Social Sciences), and Pearson's correlation coefficient () was used to find the correlation between age (years) and TCI.
TCI was computed for each tooth and regressed on the real age of the sample. The correlation coefficient "" was -0.865 (for premolar combined sample) and -0.850 (for molar combined sample). The obtained equations were tested on test sample of fifty teeth and age was determined. The absolute mean error between actual and predicted age for premolars was 6.72 months and for molars, it was 9 months.
Age estimation using TCI is a precise, noninvasive, less time-consuming, and an inexpensive method.
基于随着年龄增长，由于继发性牙本质沉积导致牙髓腔尺寸减小，通过平行投照技术利用口内根尖片，根据牙冠指数（TCI）进行年龄估计。
本研究的目的是使用下颌第一磨牙和第二前磨牙的根尖片，通过牙冠牙髓腔指数对印度成年人进行年龄估计。
研究材料包括400张来自年龄在20 - 60岁的登记参与者的下颌第二前磨牙和下颌第一磨牙的口内根尖片，参与者不限性别。
使用SPSS（社会科学统计软件包）进行数据分析，并用Pearson相关系数（）来确定年龄（岁）与TCI之间的相关性。
计算每颗牙齿的TCI，并对样本的实际年龄进行回归分析。相关系数“”在前磨牙合并样本中为 -0.865，在磨牙合并样本中为 -0.850。所得方程在五十颗牙齿的测试样本上进行检验并确定年龄。前磨牙实际年龄与预测年龄之间的绝对平均误差为6.72个月，磨牙为9个月。
使用TCI进行年龄估计是一种精确、无创、耗时少且成本低的方法。
