Sexual dimorphism of enamel area, coronal dentin area, bicervical diameter and dentinoenamel junction scallop area in longitudinal ground section

Abstract

Introduction: Sex determination plays an important role in forensics; several studies done using radiographs, model cast and animal teeth have shown that males possess larger tooth crown and more dentin than that of the females. As physical sectioning of tooth provides more accurate measurement of enamel thickness when compared with other methods, the present study was done to evaluate and compare enamel area (EA), coronal dentin area (CDA), bi-cervical diameter (BCD), average enamel thickness (AET) and dentinoenamel junction scallop area (DEJ-SA) in longitudinal ground sections of first premolars between males and females. Materials and Methods: A total of 60 extracted first premolar teeth were used for the study, of which 30 were from male and 30 were from female. A longitudinal ground section of 15 maxillary and 15 mandibular premolars of approximately 50 μm was prepared buccolingually at the center of each tooth and mounted on the slide. Multiple photomicrographs were captured with the help of Image Analysis System Software-Progres, Speed XT core 3. EA, CDA, length of the dentinoenamel junction and BCD were measured. Average DEJ-SA and AET were also calculated. Results: Mann–Whitney U- test was used for statistical analysis. It was found that EA and AET were significantly greater in females than in males. On the contrary, it was found that CDA was significantly greater in males than in females. However, no significant difference was found in BCD and DEJ-SA between males and females. Conclusion: Permanent first premolar can be reliably used in the field of forensic in establishing gender of individuals by measuring its EA, CDA and AET.

Evaluation of sexual dimorphism in human premolars using longitudinal ground sections- A cross sectional study

“…11 In our study males possess greater coronal dentin area then females although there were no significant differences in DEJ length in males & females. In the present study females possess greater enamel area (EA) and average enamel thickness (AET) than males which were also in consistent with the study done by Monalisa, et al 12 Although there was no significant difference between the Bicervical diameter (BCD) & length of DEJ between males and females in the present study and the results were in consistent with the study done by Monalisa, et al 12 As the results of the present study showed the correlation between the crown morphology of males and females and the males possess greater CDA than females and the females possess greater EA & AET than females. These differences can be used as a diagnostic aid in forensic analysis when there is need to determine the sex of unknown individuals.…”

Evaluation of the influence of connective tissue dysplasia on morphologic and biochemical rearrangements in the organic and mineral matrix of lower third molars at different stages of eruption

“…Подобные научные исследования изучены недостаточно, хотя можно предположить, что определенные органы и системы рта (зубы, десны, мышечный каркас) опережают в развитии другие (челюстные кости, височно-нижнечелюстной сустав). Данные процессы отражаются на эстетическом, косметическом, функциональном результатах из-за глубоких морфологических изменений, приводящих к нарушению прикуса, увеличению размеров отдельных зубов [13][14][15] . Дисбаланс в развитии всего организма, отдельных органов рта изменяет сроки и механизмы прорезывания временных и постоянных зубов [ 16 ] .…”

Evaluation of tooth coronal index bicervical diameter in mesiodistal direction & modified kvaals method for age and gender determination using digital panoramic radiographs: A retrospective study

“…5 The bicervical diameter in mesiodistal direction of posterior teeth is larger for males than females. 6 The present study was done to assess the accuracy of age estimation from TCI, Modified kvaal's method and bicervical diameter in mesiodistal direction by radiographic analysis.…”