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Updated: Jan 27, 2026
07:11
Treatment of Facial Deformities using 3D Planning and Printing of Patient-Specific Implants
Published on: May 23, 2020
7.9K
Evaluation of virtual surgical plan applicability in 3D simulation-guided two-jaw surgery
Hossam Hassan Fawzy1, Jong-Woo Choi2
1Department of Plastic and Reconstructive Surgery, Menoufia University College of Medicine, Shebin Elkom, Egypt.
Summary
We developed a new method to measure virtual surgical plan (VSP) applicability in 3D simulation-guided orthognathic surgery. Cleft-related deformities were found to reduce VSP applicability compared to other conditions.
Area of Science:
- Oral and Maxillofacial Surgery
- Medical Simulation
- Biomedical Engineering
Background:
- Three-dimensional (3D) simulation-based orthognathic surgery is increasingly utilized.
- Standardized methods are needed to evaluate the efficacy and reliability of virtual surgical plans (VSP).
- Accurate measurement of VSP applicability is crucial for assessing planned vs. actual surgical outcomes.
Purpose of the Study:
- To present a method for calculating VSP applicability.
- To investigate factors influencing VSP applicability in simulation-guided orthognathic surgery.
Main Methods:
- Retrospective study of 35 patients undergoing simulation-guided two-jaw surgery.
- Calculated absolute misapplication index (abMAI) and relative misapplication index (rMAI) based on actual (Ta) and planned (Tp) movements.
- Analyzed factors affecting VSP applicability, including cleft-related deformities.
Main Results:
- Mean abMAI was 1.11 mm, with significant differences between maxilla and mandible.
- rMAI showed no significant difference between maxilla and mandible.
- Cleft-related deformities were associated with significantly lower VSP applicability (p=0.006).
Conclusions:
- The relative misapplication index (rMAI) is a reliable measure for VSP applicability, independent of movement distance.
- Cleft-related deformities represent a significant factor associated with reduced VSP applicability in orthognathic surgery.
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