A imagem do scanner intraoral como ferramenta complementar de ensino para preparo dental

Abstract

The intraoral scanner is a tool that brings substantial benefits by providing a three-dimensional and detailed view of oral structures, but little is known about its impacts as a complementary teaching tool. The aim of this study was to evaluate the use of the intraoral scanner as a didactic resource in dental preparation training when compared to the conventional approach. The participants of this research consisted of 34 undergraduate students enrolled in the Dentistry course at the Federal University of Juiz de Fora, Governador Valadares Campus, enrolled in the discipline of Fixed Partial Prosthesis, without any previous experience in performing preparations for the full crown and in the use of the intraoral scanner. The students performed two preparations for metal-ceramic crowns in upper right central incisors (element 11) on the Top Dentistry Pd100 Mannequin. These students were divided into two groups: the control group, which performed the preparation analysis directly on the mannequin model, and the experimental group, which analyzed using the 3shape Viewer Software, with models obtained by the Trios 3 intraoral scanner. The analysis criteria included the cervical region, the axial region, the occlusal region, the palatine region, the presence of sharp angles, damage to adjacent teeth, the volume of the preparation, and the time required to perform the preparation. For volume, the tests did not show statistically significant differences. With regard to the time needed to prepare the preparations, the repeated measures ANOVA test revealed statistically significant differences when evaluated in isolation and also when considering the group*time factor. Regarding the cervical line, axial wear, palatal wear, and damage to adjacent teeth, both the Kruskal-Wallis test and the Post Hoc test of multiple comparisons demonstrated statistical significance. However, with regard to the convergence of the preparation and the presence of sharp angles, the Kruskal-Wallis test did not reveal statistical significance. The use of the image generated by an intraoral scanner as a complementary teaching tool influenced the understanding of errors in preparations for the total crown, resulting in substantial improvements compared to the direct visualization method on the manikin.