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Does Mandibular Gonial Angle Influence the Eruption Pattern of the Lower Third Molar? A Three-Dimensional Study.
Selene Barone1, Alessandro Antonelli1, Fiorella Averta1
1Department of Health Sciences, School of Dentistry, Magna Graecia University of Catanzaro, 88100 Catanzaro, Italy.
Journal of Clinical Medicine
|September 28, 2021
Summary
A smaller gonial angle (GA) in the mandible is linked to more impacted lower third molars (M3M). This finding suggests GA is a key factor in predicting M3M impaction and position.
Area of Science:
- Dentistry
- Oral and Maxillofacial Surgery
- Radiology
Background:
- Impacted lower third molars (M3M) are common dental issues.
- The anatomical relationship between mandibular morphology and M3M impaction requires further investigation.
Purpose of the Study:
- To investigate the correlation between the gonial angle (GA) and the position of impacted lower third molars (M3M).
Main Methods:
- Retrospective cross-sectional study using Cone Beam Computed Tomography (CBCT) data.
- Morphometric analysis of the mandible, including gonial angle, ramus dimensions, and retromolar space.
- Statistical analysis (descriptive, bivariate, regression) to assess correlations (p < 0.05).
Main Results:
- A reduced gonial angle (GA) was significantly associated with deeply impacted M3M in the ramus.
- Lower GA values correlated with more horizontal M3M positions, closer to the mandibular canal.
- Decreased GA was linked to reduced retromolar space and more complex M3M impactions.
Conclusions:
- A statistically significant correlation exists between the gonial angle (GA) and lower third molar (M3M) position.
- Reduced GA values are associated with a higher incidence of impacted M3M.
