Impacto de condiciones intra y extraorales en la eficacia y eficiencia de dos sistemas de escaneado intraoral

Abstract

The research aims at quantifying the efficacious and effective influence of different clinical conditions of two scanners. Here, we performed a virtual set-up with six sterolithographic models with controlled clinical conditions that included crowding and inclined mandibular molar (N:1800). Six different crowding groups were stablished: G1-2mm, G2-4 mm, G3-7 mm, G4-0º molar inclination, G5-15º molar inclination, and G6-with a molar inclination of 30º. Additionally, two intraoral scanning systems were used (3Shape TRIOS and ITERO) lighting conditions: 0/1800/3600 lux.The following measures were analyzed to evaluate the effectiveness and efficiency of the scanning: number of images, scanning time , scannig failures and undetected volume. Measurements were made by an independent operator. The standard and homogeneous variables were tested by the Kolmogorov-Smirnov test. therefore, the variables used for the evaluation of efficacy and effciency (number of images, scanning time, scanning failures and undetected volume) were assessed by the Kruskal-Wallis and the Mann-Whitney U tests. The stattistical significance was established at lower p-value than 0.05 (p<0.05). Results: The finding suggests that the effectiveness and efficiency of the scan (number of images, scanning time, scanner failures, volume not detected) with th systems mentioned hereinabove are affected significantly by the amount of crowding and the inclination of the molar adjacent to the gap ( p<.05). hence, fewer images and longer scanning time in crowding degrees 4 and 7 mm are required by the TRIOS system. Also, the TRIOS system has a lower loss of scan volume compared to the ITERO system in any crowded condition. Regarding the molar inclination, the effectiveness and efficiency is altered, since the TRIOS system makes fewer severe inclination scanning errors which leads to a lower loss of scanned volume compared to the ITERO system in any inclination conditions and ambient lightning (p<0.05). Lighting conditions statistically influences the effectiveness and efficiency of scanning with ITERO and TRIOS systems.Therefore, severe crowding and inclination of molar are critical clinical conditions that affect the precision and quality of scanning intraoral. External factors, such as the surrounding lighting, influence the effectiveness and efficiency of the scan, whereas ITERO system is more sensitive to changes in external ambient lighting conditions than 3Shape TRIOS.