Evaluation of Sexual Dimorphism and Age Determination Through Bimastoid Breadth Measurement Using Digital Computed Tomography Images in the Iranian Population
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Abstract
Individual identification is a critical focus of forensic research, aiming to achieve heightened accuracy in the identification process. Particularly in cases involving fragmented and damaged skeletal remains, sex determination plays a pivotal role. It is imperative to establish the precision of cadaver bones in such scenarios. This research aimed to evaluate sex-based differences and assess age using bimastoid width measured through digital computed tomography images. The study included a total of 153 adults (77 males and 76 females) aged between 15 and 50. Bimastoid breadth measurements were obtained from CT scan images of the skull base, revealing that bimastoid distance is larger in males compared to females. The study observed significant differences in bimastoid breadth between men and women, with an average mastoid width of 132.371 in men and 121.724 in women. The findings indicate that the measurement of bimastoid breadth does not significantly change with increasing age. However, substantial differences were found between men and women in bimastoid breadth measurements, which can be utilized to determine sex in forensic investigations.
Keywords
Forensic sciences, Age determination, Bimastoid breadth measurement, Digital computed tomography., Sexual dimorphism
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References
Krogman WM, Isçan MY. The human skeleton in forensic medicine, Charles C. Thomas, Springfield, IL. 1986:202-08.
Can IO, Ekizoglu O, Hocaoglu E, Inci E, Sayin I, Kaya KH. Forensic age estimation by spheno-occipital synchondrosis fusion degree: computed tomography analysis. Journal of Craniofacial Surgery. 2014;25(4):1212-6.
Klepinger LL. Fundamentals of forensic anthropology: John Wiley & Sons; 2006.
Brenner CH, Weir BS. Issues and strategies in the DNA identification of World Trade Center victims. Theoretical population biology. 2003;63(3):173-8.
Cattaneo C, De Angelis D, Porta D, Grandi M. Personal identification of cadavers and human remains. Forensic anthropology and medicine: Springer; 2006. p. 359-79.
Gurses MS, Inanir NT, Soylu E, Gokalp G, Kir E, Fedakar R. Evaluation of the ossification of the medial clavicle according to the Kellinghaus substage system in identifying the 18-year-old age limit in the estimation of forensic age—is it necessary? International journal of legal medicine. 2017;131(2):585-92.
Özer CM, Atalar K, Öz II, Toprak S, Barut C. Sphenoid sinus in relation to age, gender, and cephalometric indices. Journal of Craniofacial Surgery. 2018;29(8):2319-26.
Parson W. Age estimation with DNA: from forensic DNA fingerprinting to forensic (epi) genomics: a mini-review. Gerontology. 2018;64(4):326-32.
Freire-Aradas A, Phillips C, Lareu M. Forensic individual age estimation with DNA: from initial approaches to methylation tests. Forensic science review. 2017;29(2).
Krishan K, Chatterjee PM, Kanchan T, Kaur S, Baryah N, Singh R. A review of sex estimation techniques during examination of skeletal remains in forensic anthropology casework. Forensic science international. 2016;261:165. e1-. e8.
Lillie EM, Urban JE, Lynch SK, Weaver AA, Stitzel JD. Evaluation of skull cortical thickness changes with age and sex from computed tomography scans. Journal of Bone and Mineral Research. 2016;31(2):299-307.
Hosseini A, Soleimannejad M, Javadi A, Kazemifar A, Darabi S, Pourkeramat S. Sex and Age Determination by Measurement of Foramen Magnum Dimensions on Computer Tomography Scanning Study in the Iranian Population. Journal of Craniofacial Surgery. 2021;32(7):e604-e7.
Demiralp K, Cakmak SK, Aksoy S, Bayrak S, Orhan K, Demir P. Assessment of paranasal sinus parameters according to ancient skulls’ gender and age by using cone-beam computed tomography. Folia morphologica. 2019;78(2):344-50.
Nagata T, Taniguchi K, Ogawa Y, Imaizumi K, editors. Age estimation from human skeleton by machine learning. 2020 21st International Conference on Research and Education in Mechatronics (REM); 2020: IEEE.
Buran F, Can IO, Ekizoglu O, Balci A, Guleryuz H. Estimation of age and sex from bimastoid breadth with 3D computed tomography. Rom J Leg Med. 2018;26(1):56-61.
Yilmaz MT, Yüzbasioglu N, Cicekcibasi AE, Seker M, Sakarya ME. The evaluation of morphometry of the mastoid process using multidetector computed tomography in a living population. Journal of Craniofacial Surgery. 2015;26(1):259-63.
Farhadian M, Salemi F, Shokri A, Safi Y, Rahimpanah S. Comparison of data mining algorithms for sex determination based on mastoid process measurements using cone-beam computed tomography. Imaging Science in Dentistry. 2020;50(4):323.
Kramer NA, Lopez-Capp TT, Michel-Crosato E, Biazevic MGH. Sex estimation from the mastoid process using Micro-CT among Brazilians: Discriminant analysis and ROC curve analysis. Journal of Forensic Radiology and Imaging. 2018;14:1-7.
Sent-Doux K, Moore MH, Tan ST. Bilateral Mastoid Process Hypertrophy Associated With Severe Trismus. The Journal of Craniofacial Surgery. 2020.
Jain D, Jasuja O, Nath S. Sex determination of human crania using mastoid triangle and opisthion–bimastoid triangle. Journal of forensic and legal medicine. 2013;20(4):255-9.
Petaros A, Sholts SB, Slaus M, Bosnar A, Wärmländer SK. Evaluating sexual dimorphism in the human mastoid process: A viewpoint on the methodology. Clinical Anatomy. 2015;28(5):593-601.
Saini V, Srivastava R, Rai RK, Shamal SN, Singh TB, Tripathi SK. Sex estimation from the mastoid process among North Indians. Journal of Forensic Sciences. 2012;57(2):434-9.
Steyn M, İşcan MY. Sexual dimorphism in the crania and mandibles of South African whites. Forensic science international. 1998;98(1-2):9-16.
Kranioti EF, García-Donas JG, Can IO, Ekizoglu O. Ancestry estimation of three Mediterranean populations based on cranial metrics. Forensic science international. 2018;286:265. e1-. e8.
Marinescu M, Panaitescu V, Rosu M, Maru N, Punga A. Sexual dimorphism of crania in a Romanian population: Discriminant function analysis approach for sex estimation. Rom J Leg Med. 2014;22(1):21-6.2001;220–33.
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