Evaluation of Mandibular Autorotation Following Maxillary Impaction: A Case Report Using ProPlan CMF Software
Regeneration, Reconstruction & Restoration (Triple R),
Vol. 10 (2025),
1 January 2025
https://doi.org/10.22037/rrr.v10.47468
Abstract
Background and objectives: Vertical Maxillary Excess (VME) is one of the clinical scenarios resulting from excessive vertical growth of the maxilla. The degree of mandibular autorotation affects the achievement of the desired occlusion. We aimed to determine the degree of autorotation of the mandible after maxillary impaction using cephalometric analysis with ProPlan CMF software.
Materials and methods: One individual with class 1 malocclusion and one with class 1 malocclusion and VME were included. Three-dimensional models of the jaw and face were reconstructed using cone beam computed tomography (CBCT) data for cephalometric analysis. Le Fort 1 osteotomy with three levels of maxillary impaction (2, 4, and 6 millimeters) was simulated as a whole impaction in the three-dimensional model.
Results: With a 1-millimeter impaction of the entire maxilla, autorotation of the mandible was 0.45 degrees, which increased with an increase in the impaction of the maxilla. There was an association between the impaction of the maxilla and the autorotation of the mandible. The Sella-Nasion-Basion angle increased with maxillary impaction. Consequently, the autorotation of the mandible decreased the Frankfort mandibular plane angle, from 31.8 to 29 degrees. Edge-to-edge occlusion and the necessity for mandibular osteotomy were demonstrated for impaction values exceeding 2 millimeters.
Conclusion: With a 1-millimeter impaction of the maxilla, the mandible rotated by 0.45 degrees. Further large-scale studies are recommended.
- Total Maxillary Impaction
- Mandibular Autorotation
- Vertical Maxillary Excess
- Orthognatic Surgery
- ProPlan Software
How to Cite
References
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