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Triangular mesh reduction of digitized maxillectomy defects for prosthetic rehabilitation: A 3D deviation study
Mahmoud E Elbashti1, Amel Aswehlee2, Marwa Abdel Rahman3
1Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan.
Journal of Dentistry
|March 11, 2022
Summary
Triangular mesh reduction up to 50% maintains the accuracy of digital maxillectomy defect models. Reductions exceeding 75% significantly increase 3D deviations, impacting model trueness.
Area of Science:
- Digital dentistry
- 3D modeling
- Maxillofacial reconstruction
Background:
- Digitizing patient-specific models is crucial for reconstructive surgery.
- Mesh reduction techniques can optimize file sizes for digital models.
- Evaluating the impact of mesh reduction on model accuracy is essential.
Purpose of the Study:
- To assess the effect of triangular mesh reduction on the trueness of digitized maxillectomy defect models.
- To determine the optimal mesh reduction percentage for maintaining accuracy.
Main Methods:
- Twenty gypsum models of maxillectomy defects were digitized.
- Triangular mesh reduction was applied to create datasets with 50%, 75%, and 90% file size reduction.
- 3D deviations were calculated by comparing reduced datasets to the original reference dataset using GOM Inspect software.
Main Results:
- A 50% mesh reduction resulted in no significant 3D deviations.
- 3D deviations increased significantly with mesh reduction levels greater than 75%.
- Statistically significant increases in deviations were observed with higher mesh reduction percentages (p<0.001).
Conclusions:
- Digital models of maxillectomy defects can be reduced by 50% without compromising trueness.
- Mesh reduction exceeding 75% leads to significant 3D deviations.
- A 50% mesh reduction effectively reduces storage capacity by half while preserving model accuracy.
