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A Postoperative Evaluation Guideline for Computer-Assisted Reconstruction of the Mandible
Published on: January 28, 2020
Accuracy of a computer-aided surgical simulation protocol for orthognathic surgery: a prospective multicenter study
Sam Sheng-Pin Hsu1, Jaime Gateno, R Bryan Bell
1Department of Oral and Maxillofacial Surgery, The Methodist Hospital Research Institute, and Department of Pediatric Surgery, The University of Texas Health Science Center, Houston, TX 77030, USA.
Summary
This study found that computer-aided surgical simulation (CASS) accurately transfers orthognathic surgery plans to patients. Computer-generated chin templates improve chin repositioning accuracy compared to standard measurements.
Area of Science:
- Oral and Maxillofacial Surgery
- Medical Simulation
- Biomedical Engineering
Background:
- Orthognathic surgery corrects jaw and facial deformities.
- Accurate transfer of surgical plans to patient anatomy is crucial for successful outcomes.
- Computer-aided surgical simulation (CASS) offers potential for improved planning and execution.
Purpose of the Study:
- To evaluate the accuracy of a CASS protocol for orthognathic surgery.
- To compare the precision of computer-generated chin templates versus standard measurements for genioplasty.
Main Methods:
- Prospective multicenter study of 65 orthognathic surgery patients.
- Comparison of planned outcomes with postoperative results using CASS.
- Analysis of linear and angular differences for maxilla, mandible, and chin using RMSD and Bland-Altman methods.
Main Results:
- CASS protocol demonstrated high accuracy for maxilla (1.0 mm, 1.5°) and mandible (1.1 mm, 1.8°) repositioning.
- Computer-generated chin templates significantly improved chin segment accuracy (1.0 mm, 2.2°) compared to standard methods.
- Maxillary dental midline repositioning accuracy was 0.9 mm.
Conclusions:
- The CASS protocol enables accurate and consistent intraoperative transfer of surgical plans for maxilla and mandible.
- Computer-generated chin templates enhance precision in chin repositioning during orthognathic surgery.
