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Updated: Jan 25, 2026
08:01
Designing CAD/CAM Surgical Guides for Maxillary Reconstruction Using an In-house Approach
Published on: August 24, 2018
9.4K
3D Airway changes using CBCT in patients following mandibular setback surgery ± maxillary advancement
Andrew G Havron1, Sharon Aronovich2, Anita V Shelgikar3
1Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, Michigan.
Orthodontics & Craniofacial Research
|May 11, 2019
Summary
Mandibular setback surgery alone can increase airway dimensions, but bimaxillary surgery offers greater airway expansion. This research compares 3D airway changes after these procedures.
Area of Science:
- Orthognathic surgery
- 3D imaging analysis
- Airway morphometrics
Background:
- Skeletal deformities often require orthognathic surgery.
- Understanding 3D airway changes is crucial for patient outcomes.
- Comparing isolated mandibular setback vs. bimaxillary surgery is important.
Purpose of the Study:
- To evaluate 3D airway modifications after mandibular setback surgery alone compared to bimaxillary surgery.
- To assess changes in airway volume and cross-sectional areas.
- To analyze airway alterations in patients with similar skeletal starting points.
Main Methods:
- Retrospective analysis of 85 patients' pre- and post-surgical CBCT scans.
- Comparison between mandibular setback alone (14 patients) and bimaxillary surgery (71 patients).
- Utilized cross-sectional, minimum cross-section, and volumetric analyses.
Main Results:
- Mandibular setback alone significantly increased minimum axial airway area (47.5 mm²).
- Bimaxillary surgery significantly increased overall airway volume and dimensions in multiple regions.
- Both procedures demonstrated safe airway management.
Conclusions:
- Mandibular setback surgery can be performed without compromising airway dimensions.
- Bimaxillary surgery provides more substantial airway increases, making it preferable for borderline OSA patients.
- Further long-term polysomnography studies are needed to confirm functional implications.
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