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Updated: Jun 7, 2026
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Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures
Published on: August 5, 2021
Development of a simulation system in mandibular orthognathic surgery based on integrated three-dimensional data
Yoshihide Mori1, Hidetaka Shimizu, Katsuhiro Minami
1Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Kyushu University, Higashi-ku, Fukuoka, Japan. y-mori@dent.kyushu-u.ac.jp
Oral and Maxillofacial Surgery
|October 29, 2010
Summary
This study introduces a new 3D surgical simulation system for precise virtual osteotomy and bony interference evaluation in orthognathic surgery, improving treatment planning for facial asymmetry.
Area of Science:
- Oral and Maxillofacial Surgery
- Biomedical Engineering
- Computer-Aided Surgery
Background:
- Accurate 3D simulation of dentition and osteotomized segment movement is crucial for successful orthognathic surgery outcomes.
- Existing simulation methods may not fully capture the complex 3D dynamics of surgical procedures.
- Evaluating bony interference is essential to prevent complications like condylar torque and malpositioning.
Purpose of the Study:
- To develop a novel simulation system for virtual osteotomy of the mandible.
- To enable precise evaluation of bony interference between osteotomized segments.
- To enhance the accuracy of treatment planning in orthognathic surgery, particularly for cases with facial asymmetry.
Main Methods:
- Integrated 3D computed tomography (CT) data of maxillomandibular dental casts into a standard 3D cephalogram coordinate system.
- Validated system accuracy by comparing 3D CT virtual model measurements with a contact-type 3D digitizer.
- Assessed clinical applicability by evaluating 15 patients with mandibular prognathism and varying degrees of asymmetry using the simulation program.
Main Results:
- The developed system achieved an average measurement error of 1.31 mm across all directions.
- Successfully simulated various osteotomy procedures by standardizing 3D coordinate data.
- Demonstrated the ability to identify and mitigate bony interference, preventing condylar torque and segment malpositioning through 3D virtual model visualization.
Conclusions:
- A new system for precise visualization of osteotomized segments and calculation of bony interference in orthognathic surgery has been developed.
- The system offers acceptable precision for treatment planning, especially in complex cases involving facial asymmetry.
- This technology holds potential for improving surgical outcomes and reducing complications in corrective jaw surgery.
