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Author Spotlight: Development of a Novel Finite Element Analysis Model for Improved Orthognathic Surgical Techniques
Published on: October 20, 2023
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3D simulation of interosseous interference in sagittal split ramus osteotomy for mandibular asymmetry
Santhiya Iswarya Vinothini Udayakumar1, Dohyoung Kim1, So-Young Choi1
1Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyungpook National University, 2177 Dalgubeol-Daero, Jung-Gu, Daegu, 41940, Republic of Korea.
Maxillofacial Plastic and Reconstructive Surgery
|September 17, 2023
Summary
Computer-aided 3D surgical simulation can predict bony interference in sagittal split ramus osteotomy (SSRO). This analysis helps improve surgical outcomes by identifying potential bone collisions before the procedure.
Area of Science:
- Oral and Maxillofacial Surgery
- Orthognathic Surgery
- Surgical Simulation
Background:
- Mandibular prognathism often requires sagittal split ramus osteotomy (SSRO).
- Interosseous interference can complicate SSRO outcomes.
- Predicting and managing bony interference is crucial for successful surgery.
Purpose of the Study:
- To evaluate predicted interosseous interference patterns in SSRO.
- To identify factors influencing the volume of bony interference.
- To assess the utility of computer-assisted 3D simulation for SSRO planning.
Main Methods:
- Retrospective analysis of 116 patients undergoing SSRO.
- Classification of patients into three groups based on menton (Me) deviation.
- 3D simulation using cone-beam computed tomography (CBCT) data to predict interference.
- Analysis of ramal inclinations and skeletal measurements pre- and post-surgery.
Main Results:
- Interosseous interference was more frequent on the contralateral side of chin deviation.
- Group 3 showed significantly more interference volume on the long side (186 mm³ vs. 54.4 mm³).
- Bilateral interference volume correlated with Me deviation and ramal inclination; Me deviation predicted interference volume.
Conclusions:
- 3D surgical simulation effectively visualizes and helps reduce potential bony collisions.
- Osseous interference can occur unilaterally or bilaterally.
- Preoperative 3D simulation is essential for predicting osseous interference and optimizing ramal inclination in SSRO.
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