Is there a Relationship between Mandibular Gonial Angle and The Patterns of Mandibular Fractures? A Retrospective Study Based on 3D Measurements

Elghamri, Belal Tayssir; El Hadidy, Mohamed Radwan; Mansour, Nabil Mokhtar

doi:10.21608/ejprs.2025.407006

Is there a Relationship between Mandibular Gonial Angle and The Patterns of Mandibular Fractures? A Retrospective Study Based on 3D Measurements

Document Type : Research article

Authors

The Department of Plastic and Reconstructive Surgery, Faculty of Medicine, Mansoura University

10.21608/ejprs.2025.407006

Abstract

Background: Mandibular fractures usually involve one
or multiple sites with different patterns which depend on
various factors such as the force applied, type of injury, in
addition to the morphological and anatomical characteristics
of the mandible. Few studies proved a relationship between
mandibular angle measurement and fractures in the angle region.
In this study, we looked through the ties of gonial
angle measurement and all associated ipsilateral mandibular
fractures.
Objective: To investigate weather gonial angle measurement
would be one predictor to the location of mandibular
fractures.
Method: This retrospective cohort study included patients
diagnosed with mandibular fractures between 2018 and 2023.
100 cases were randomly selected. The gonial angle was measured
using 3D C.T. scans. Fracture patterns were categorized
into two groups: Group A (Angle region) and Group B (Not
Angle region).
Results: The mean gonial angle in patients with fractures
in the angle region was 125 degrees, compared to 117 degree
in patients with fractures in the non-angle region, which was a
statistically significant difference (p < 0.001).
Conclusion: The mandibular gonial angle is a powerful
determinant factor affecting the mandibular fracture pattern.
The stronger and less obtuse mandibular angle the more
likely a fracture pattern to spare the angle region.

Keywords

Main Subjects

Maxillofacial and cranio-maxillo-facial surgery

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