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The Morphometric Measurements of the Mandible; Gonial and Incisure Angles
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  • Zumrut Dogan,
  • Kadir Kaplanoğlu,
  • Metin Çalışır,
  • Ayhan Cömert
Zumrut Dogan

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Kadir Kaplanoğlu
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Metin Çalışır
Adiyaman University
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Ayhan Cömert
Ankara University
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ABSTRACT Background: The mandible, the largest and strongest bone in the face, is the only bone in the skull that does not have a sutural joint. Before starting surgical procedures and clinical approaches, it is necessary to know the anatomy of this region well. Materials and methods: It is a radiology-based morphometric study in which retrospectively scanned images of adult individuals in the 20-50 age range, whose results are normally reported using CT (Conical Beam Computed Tomography) {n=212}. Tomographic images, photographed with Planmeca ProMax3DMid ProFace brand CBCT device, was examined using the Planmeca Romexis 4.6.2.R licensed program. Mandibular incisure angle and gonial angle of the mandible were measured from those images. Gender and age-related comparisons were performed. Results: In all groups, the relationship between the right incisure angle and the right gonial angle was determined as a weak positive relationship, but was found to be statistically significant. The Gonial angle is larger in females on both sides of the jaw than in males. In the study of changes in correlation between mandibular incisure and gonial angle depending on age groups, a statistically significant positive correlation was found in the group that we can call young adults, while a significant difference was not observed in the middle age group and the group that we can call old age. Conclusions: Age and gender-based reference values of gonial angle of mandible and mandibular incisure angle were determined. It is the first study in the literature in which the size and shape of the Incisure angle is evaluated on a cross-population and gender basis. We believe that these angles will have many benefits from a clinical point of view.