2025 Volume 3 Issue 1 Pages 9-16
Purpose : This study aimed to investigate the effects of using a scanning powder on the accuracy of intraoral optical impression techniques using an intraoral scanner.
Methods : Seven implants with external structures were embedded in the regions corresponding to the right central incisor, canine, second premolar, and second molar, as well as the left canine, second premolar, and second molar of a maxillary complete edentulous model. A reference sphere for calibration was placed on the palatal side, establishing it as the reference model for this study. Ball abutments were attached to the implants, and the distances between each ball abutment were measured using a contact-type three-dimensional coordinate-measuring machine for three-dimensional shape measurement, establishing the distances as reference values. Subsequently, using an intraoral scanner (Trios 3, 3Shape, Denmark), three-dimensional shape data were acquired both with and without the use of scanning powder. The obtained data were analyzed for trueness and precision in terms of the distances between each ball abutment using three-dimensional image analysis software. Statistical analysis was performed using the Mann-Whitney test. A P-value of ＜0.05 was considered statistically significant.
Results : Compared to scanning with or without powder, errors significantly increased in certain areas when scanning without powder.
Conclusions : The effectiveness of scanning powder used for anti-reflection was analyzed through this comparative study, and it was shown that the powder has the potential to improve the accuracy of intraoral scanners.
