Abstract
Background Condylar fractures are commonly associated with symphysis/parasymphysis fractures. Condylar fractures have been attributed to direct and indirect traumatic forces, the direction and magnitude of the forces, and the condylar anatomy. The chief aim of this study was to determine the association between the newly defined mandibular chin angle and the occurrence of condylar fractures. Materials and Methods A retrospective study was conducted to analyze two-dimensional computed tomography (2D CT) scans of patients with a history of chin trauma. The outcome was a symphysis/parasymphysis fracture with or without fracture of the mandibular condyle. The Mediff InstaRISPACS web-based platform was used to measure the chin angle. The cerebral aqueduct of Sylvius in the corresponding 2D CT midsagittal image was the standard reference plane to measure the chin angle. The SPSS Version 20 (IBM Corp, Armonk, NY) was used for data analysis. Results The sample size included 120 2D CT scans of patients with symphysis/parasymphysis fractures (60 associated with condylar fractures and 60 without condylar fractures). The mean chin angle in the group without condylar fracture was 133.35 ± 3.87°, which was approximately 15° lesser than in the condylar fracture group (mean, 148.56 ± 5.49°), and these findings were statistically significant (P < 0.05). Conclusion Individuals with a high chin angle are potentially at a higher risk of sustaining associated condylar fractures.
Highlights
Condylar fractures are commonly associated with symphysis/parasymphysis fractures
E analysis of data indicates a significant association between the chin angle and condylar fractures. e association of condylar fractures with high chin angle cases was significantly increased (Figure 5)
Several studies have reported various factors for the occurrence of condylar fractures, such as weaker areas along the length of the mandible, the effect of direct and indirect forces of trauma acting on the mandible, and the condylar morphologic features. e forces of trauma are usually distributed along the entire length of the mandible [15]
Summary
Condylar fractures are commonly associated with symphysis/parasymphysis fractures. E chief aim of this study was to determine the association between the newly defined mandibular chin angle and the occurrence of condylar fractures. E outcome was a symphysis/parasymphysis fracture with or without fracture of the mandibular condyle. E Mediff InstaRISPACS web-based platform was used to measure the chin angle. E sample size included 120 2D CT scans of patients with symphysis/parasymphysis fractures (60 associated with condylar fractures and 60 without condylar fractures). E mean chin angle in the group without condylar fracture was 133.35 ± 3.87°, which was approximately 15° lesser than in the condylar fracture group (mean, 148.56 ± 5.49°), and these findings were statistically significant (P < 0.05). Individuals with a high chin angle are potentially at a higher risk of sustaining associated condylar fractures
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