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The Relationship Between Mandibular Movement and Condylar Resorption in Mandibular Advancement Surgery
Mehmet C Nergizoğullari1, Ahmet F Yücel2, Şahin Bariş3
1Plastic, Reconstructive and Aesthetic Surgery, Malatya Research and Training Hospital, Malatya, Türkiye.
The Journal of Craniofacial Surgery
|May 11, 2026
Summary
Mandibular advancement can cause condyle resorption. Studies show that advancing the mandible 6 mm or more significantly increases this resorption, impacting orthognathic surgery outcomes.
Area of Science:
- Orthodontics and Maxillofacial Surgery
- 3D Imaging and Computational Modeling
Background:
- Limited data exists on condyle resorption extent following mandibular advancement.
- Understanding this relationship is crucial for orthognathic surgery planning.
Purpose of the Study:
- To quantify condyle volume changes after mandibular advancement.
- To identify the threshold of mandibular advancement that triggers significant condyle resorption.
Main Methods:
- Retrospective analysis of cone-beam computed tomography (CBCT) scans from patients undergoing mandibular or double jaw advancement.
- Semiautomated segmentation and 3D modeling using ITK-SNAP software to calculate condyle volumes.
Main Results:
- Condyle volume loss was statistically significant (P=0.01).
- A significant increase in condyle resorption was observed with mandibular advancement of 6 mm or more (P<0.05).
Conclusions:
- Condylar volume reduction is correlated with the extent of mandibular movement in orthognathic surgery.
- Advancing the mandible by 6 mm or more is associated with significantly increased condylar resorption.
