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Mandibular ramus as a sex predictor in adult Jordanian Subjects
راموس فک پایین به عنوان پیش بینی کننده جنسیت در افراد بزرگسال اردنی-2020 Human Identification is an important part of criminal investigation, and a way to express the respect of the legal
rights of the dead. Sex estimation is the keystone of profiling. Skeletally, the skull is the best sex indicator after
pelvis. Some metric studies of sexing the mandible explore linear and areal measurements; however, these
measurements are not advisable using uncalibrated radiographs and, alternatively, ratios and angular measurements
should be tested. The main aim of this study was to explore the sex discrimination of condylar angle,
mandibular notch angle and the ratio between mandibular and condylar-coronoid areas by tracing uncalibrated
OPGs of 50 Jordanian subjects (aged 21–45 years; 50% each sex). The second aim was to develop a regression
model to predict sex using angular and ratio measurements from OPGs. ImageJ(2015) software was used to
assess the images and the data was subjected to Binary Logistic Regression analysis using SPSS(22). Results
showed that the condylar and mandibular notch angles were statistically significant predictors of sex whilst the
areal ratio was not significant. A predictive model was developed combining the two significant predictors which
was able to correctly classify 77.6% of our sample. An Excel calculator was derived from this model and validated
using novel data. 10 different OPGs were assessed using the calculator and 80% of them were classified
correctly. The conclusion is that condylar and mandibular notch angles have potential as sex predictors for adult
Jordanian subjects and the analysis of the results can be automated by the sex calculator. Keywords: Forensic anthropology | Human identification |Sex estimation | Sex calculator | Ramus measurements |
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