Evaluation of Different Mandibular Measurements by Cone Beam Computed Tomography as A Forensic Age & Gender Determination Tools.

Document Type : Original Article


1 Department of Oral Medicine, Periodontology, Oral Diagnosis & Radiology Faculty of Dental Medicine Al-Azhar University (Girls Branch) cairo, egypt

2 Professor, Oral Medicine, Periodontology, Diagnosis and Radiology department, Faculty of Dental Medicine for Girls, Al-Azhar University

3 Lecturer of Forensic Medicine and Clinical Toxicology, Faculty of Medicine for Girls, Al-Azhar University.


Purpose: The aim of the study was to analyze and assess the different dimensions of the major mandibular land marks using CBCT and also to analyze whether these parameters can be used in sexual dimorphism for forensic identification. Material and methods: retrospective study: included 102 patients (51 males and 51 females), with age group ranging between 20 and 50 years obtained from the outpatient department of oral medicine, periodontology, oral diagnosis and radiology, Faculty of Dental Medicine, Al-Azhar University for girls. Patients were divided into two groups according to gender and each group divided into three subgroups according to age. CBCT scan was performed on all the patients, and the data obtained were reconstructed for 3D viewing. After obtaining 3D-CT scan, a total of twelve mandibular measurements, i.e., (Rt, Lt) gonial angle (G-angle), bimental breadth, bigonial width, bicondylar breadth (BIC-Br), and bicoroniod breadth, Rt, Lt mental index, (Rt, Lt) height of mandible from mental foramen, maximum mandibular length were measured and mandibular index calculated; collected data were analyzed using SPSS statistical analysis program by Student’s t-test. Results: The result of the study showed that out of nine parameters, Rt gonial angle, Rt mental index, Rt and Lt height of mandible from mental foramen, bigonial width, bicondylar breadth, bicoroniod breadth, maximum mandibular length and mandibular index showed a significant statistical difference (P < 0.05), with overall accuracy of 83.7% for males and 81.3% for females. Conclusion: Mandibular parameters obtained through CBCT can aid in sex identification with much higher accuracy.


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