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Bone microstructural characteristics or positional changes of condyle head affect short-term condyle head resorption
Kazuaki Miyagawa1,2, Chihiro Arikawa1, Koichi Hayashi1
1Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Osaka University, 1-8 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
Scientific Reports
|June 20, 2024
Summary
Post-orthognathic surgery condylar resorption is influenced by pre-existing condylar bone abnormalities and misalignment, even in high-risk patients. Understanding these factors is key for preventing mandibular head resorption after bimaxillary surgery.
Area of Science:
- Orthognathic Surgery
- Temporomandibular Joint (TMJ) Research
- Bone Microstructure Analysis
Background:
- Condylar resorption after orthognathic surgery is a known complication with described risk factors.
- However, the precise mechanisms and predictive indicators remain unclear, even in high-risk patient groups.
Purpose of the Study:
- To investigate differences in condylar bone microstructure and 3D positional changes between patients with and without postoperative condylar resorption.
- To identify specific imaging-based predictors of condylar resorption following bimaxillary orthognathic surgery.
Main Methods:
- Analysis of 17 female, skeletal Class II, high-angle cases undergoing bimaxillary surgery.
- Multidetector computed tomography (MDCT) scans pre- and 6-months post-surgery.
- Comparison of condylar head bone microstructure and 3D positional changes using TRI/3D-BON software.
Main Results:
- Pre-existing condylar bone abnormalities were associated with postoperative resorption.
- High trabecular bone density, combined with surgical misalignment, increased resorption risk.
- Condylar misalignment during surgery was a critical factor in developing resorption.
Conclusions:
- Preoperative condylar bone status and intraoperative condylar positioning are crucial for preventing postoperative condylar resorption.
- This study highlights the importance of detailed imaging analysis for risk stratification and surgical planning in orthognathic procedures.
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