1Senior Lecturer, Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Siksha ‘O'Anusandhan, (Deemed to University), Bhubaneswar, Odisha, India
2Senior Lecturer, Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Siksha ‘O'Anusandhan, (Deemed to University), Bhubaneswar, Odisha, India
3Associate Professor, Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Siksha ‘O'Anusandhan, (Deemed to University), Bhubaneswar, Odisha, India
4Professor & Head, Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Siksha ‘O'Anusandhan, (Deemed to University), Bhubaneswar, Odisha, India
Age estimation in adults is an important issue in forensic science. This study aimed to validate the estimation of chronological age through previously suggested regression equation using pulp tooth ratio (PTR) of left lower lateral incisor, canine, and first premolar tooth in Odisha population.
The digital orthopantomographs of subjects aged 13 years above (n = 200) were collected from Institute of Dental Sciences, Siksha ‘O’ Anusandhan, Deemed to be University, Bhubaneswar, Odisha. The pixels of tooth area and pulp area ratio of lower left lateral incisor, canine, first premolar using histogram was observed by Adobe Photoshop CS6. Data were subjected to correlation and regression analysis of respective teeth.
Application of previously suggested regression equation to PTR of left lateral incisors, canines, first premolar teeth in Odisha population resulted in mean absolute error of more than 4, 5 and 8 respectively. Therefore, we developed an Odisha specific polynomial regression equation for mandibular left lower lateral incisor, canine, and first premolar with coefficient of correlation as 0.08, 0.8 and 0.7 respectively.
PTRs of mandibular canine and first premolar incorporated in the Odisha specific regression equation may predict age with better accuracy.
PTR-Pulp Tooth Ratio, OPG-orthopantomogram, RVG-Radiovisiography, CBCT-Cone Beamed Computed Tomography, IOPA-Intra oral periapical radiograph, RA-Regression Analysis
