QUANTIFICATION OF LINEAR AND SPATIAL DEVIATIONS DURING REPEATED INTRAORAL SCANNING OF PATIENTS WITH BRACES SYSTEMS
DOI:
https://doi.org/10.32782/3041-1394.2025-2.4Keywords:
orthodontic treatment, brackets, intraoral scanner, diagnostics, digital impressions, linear deviations, teethAbstract
Introduction. Intraoral scans can be used as a tool for serial periodic assessment of tooth movement during orthodontic treatment and for evaluating its conformity to the initially formulated treatment plan, considering that tooth movement patterns are often non-uniform and characterized by substantial standard deviations. Aim of the study. To quantify and assess the significance of linear and spatial deviations during repeated intraoral scanning of the jaws in patients with fixed orthodontic appliances. Research materials and methods. Twelve individuals undergoing orthodontic treatment with fixed appliances were enrolled in the study. Each patient underwent three intraoral scans of the maxilla and mandible using YouJoy intraoral scanner. The obtained digital impressions were analyzed in Medit Link and Medit Design software. Intercanine and intermolar distances were measured on each scan set. Spatial deviations of individual molars and anterior teeth between repeated scans were assessed using superimposition analysis. Results. Superimposition of repeated scans revealed the most pronounced deviations were noted on the vestibular surfaces of teeth (at the sites of brackets), which were significantly greater than deviations on the lingual and palatal surfaces (p < 0,05). The deviation range for intercanine distance was 0,04–0,12 mm, and for intermolar distance 0,08–0,14 mm. Conclusions. Intraoral scanner with the technology of optical videocapture provided reproducible highquality digital impressions with minimal deviations in inter-tooth distances and individual tooth contours, which can be considered clinically insignificant among patients with fixed brackets. Minor scan defects were detected in regions adjacent to brackets, though their clinical relevance appears minimal.
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