Article Sidebar
Views pdf: 244
SUPERIMPOSITION ANALYSIS OF FACIAL THREE-DIMENSIONAL MODELS ACQUIRED BY FACIAL SCANNER AND COMPUTED TOMOGRAPHY IN PATIENTS UNDERGOING ORTHOGNATHIC SURGERY
Main Article Content
Abstract
Introduction: Several methods are available for three-dimensional (3D) facial reconstruction, among which face scanners (FS) and computed tomography (CT) are considered modern techniques with high accuracy and valuable applications in surgical treatment planning. Objective: This study aims to evaluate and compare differences between 3D facial models reconstructed from FS and CT in patients undergoing orthognathic surgery using superimposition techniques. Methods: A comparative cross-sectional study was conducted on 10 patients. Each patient underwent both CT imaging and FS scanning on the same day. The 3D facial models were superimposed in 3-Matic Research software using the Surface-Based Registration (SBR) method. Discrepancies were analyzed using root mean square (RMS), mean deviation, standard deviation, minimum, and maximum deviation. Results: The mean RMS value was 0.88 ± 0.183 mm, showing statistically significant differences (P<0.05), yet remaining below the 1.0 mm threshold, indicating high concordance between FS and CT. Other indices revealed statistically significant discrepancies in certain anatomical regions, including eyebrows, pupils, upper/lower eyelids, and lower lip. Conclusion: FS is a valuable tool offering lower cost, absence of ionizing radiation, and improved patient comfort. It can be effectively applied for detailed aesthetic soft-tissue evaluation before and after orthognathic surgery.
Article Details
Keywords
Face image, Computed tomography, Facial scanner, Orthognathic surgery
References
2. Lorensen WE, Cline HE. Marching cubes: A high resolution 3D surface construction algorithm. presented at: Proceedings of the 14th annual conference on Computer graphics and interactive techniques; 1987;
3. HS B, SY K, inventors; - Facial soft-tissue changes in skeletal Class III orthognathic surgery patients. patent application - 1097-6752 (Electronic).
4. George K. Matsopoulos∗ KKD, Nicolaos A. Mouravliansky, Pantelis A. Asvestas, Konstantina S. Nikita, assilios E. Kouloulias and Nikolaos K. Uzunoglu. CT-MRI automatic surface-based registration schemes combining global and local optimization techniques. Technology and Health Care. 2003;
5. Tangthaweesuk N, Raocharernporn S. The accuracy of three-dimensional facial scan obtained from three different 3d scanners. PLoS One. 2025;20(5):e0322358. doi:10.1371/ journal.pone.0322358
6. S. C. Aung RCKNaSTL. Evaluation of the laser scanner as a surface measuring tool and its accuracy compared with direct facial anthropometric measurements. Brfrish Journal of Plasric Surgery 1995;
7. Almukhtar A, Ju X, Khambay B, McDonald J, Ayoub A. Comparison of the accuracy of voxel based registration and surface based registration for 3D assessment of surgical change following orthognathic surgery. PLoS One. 2014; 9(4):e93402. doi:10.1371/journal.pone.0093402
8. M vdV, KM D, B V, BL P. - Postoperative swelling after orthognathic surgery: a prospective volumetric. D - 8206428. (- 1531-5053 (Electronic)):- 2241-7.