ĐÁNH GIÁ ĐỘ CHÍNH XÁC CỦA PHƯƠNG PHÁP GIÁN TIẾP TRONG ƯỚC LƯỢNG TUỔI PHÁP Y DỰA TRÊN VÒNG XÊ MĂNG CHÂN RĂNG

Abstract

Background: Forensic age estimation based on tooth cementum annulations (TCA) is a simple yet reliable method. The estimated age derived from this technique depends entirely on the number of cementum lines counted. Manual counting is often difficult and, in some cases, impossible to perform. In contrast, the indirect counting method proposed by Aggarwal et al. (2008) and Gupta et al. (2013) offers several advantages. Objective: To compare the accuracy of age estimation between the manual counting method and the indirect method. Materials and Methods: This observational study was conducted on 89 premolar teeth with known chronological age. Each specimen was evaluated using both methods. Results: Manual counting was feasible in 63 out of 89 specimens (70.8%), whereas the indirect method was applicable to all specimens (100%). The bias and absolute error in age estimation using manual counting were significantly higher than those obtained with the indirect method. Conclusion: The indirect cementum annulation method is superior in both feasibility and accuracy, and it should be preferred for forensic age estimation based on tooth cementum annulations.