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Changes in condylar volume and joint spaces after orthognathic surgery
R J da Silva1, C V Valadares Souza1, G A Souza1
1Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas Areião, Piracicaba, São Paulo, Brazil.
International Journal of Oral and Maxillofacial Surgery
|November 7, 2017
Summary
Bimaxillary orthognathic surgery for Class II deformities led to reduced condylar volume and joint spaces. Changes in condylar volume varied and did not correlate with joint space alterations post-surgery.
Area of Science:
- Orthodontics and Maxillofacial Surgery
- 3D Imaging and Analysis
- Skeletal Deformity Correction
Background:
- Class II deformities often require complex surgical correction.
- Orthognathic surgery aims to improve facial aesthetics and function.
- Understanding post-surgical changes in the temporomandibular joint is crucial.
Purpose of the Study:
- To assess condylar volume and joint space changes after bimaxillary orthognathic surgery.
- To investigate the relationship between condylar volume and joint space alterations.
- To analyze these changes in patients with Class II deformities.
Main Methods:
- Retrospective analysis of cone-beam computed tomography (CBCT) scans from 57 patients.
- Volumetric analysis of condylar changes and linear measurements of joint spaces.
- Statistical analysis including paired t-tests and Pearson correlation coefficients.
Main Results:
- Mean condylar volumes significantly decreased at follow-up (P=0.0125).
- Significant reductions observed in superior and medial joint spaces (P<0.05).
- No significant correlation found between condylar volume changes and joint space alterations.
Conclusions:
- Bimaxillary orthognathic surgery in Class II patients results in reduced mean condylar volume.
- Condylar volume changes can be variable and occur independently on each side.
- Post-surgical condylar volume changes do not correlate with changes in joint spaces.
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