Scanning accuracy of an intraoral scanner according to different inlay preparation designs

• Published in: BMC oral health 2023-07, Vol.23 (1), p.515-515, Article 515
• Main Authors: Park, Yeri, Kim, Jae-Hoon, Park, Jeong-Kil, Son, Sung-Ae
• Format: Article
• Language: English
• Subjects: Accuracy; CAD-CAM systems; CAD/CAM; Computer-Aided Design; Dental Care; Dental Caries; Gingiva; Health aspects; Humans; Inlay designs; Inlays; Intraoral scanner; Precision; Scanners; Scanning; Scanning devices; Software; Teeth; Trueness; Variance analysis
• ISSN: 1472-6831; 1472-6831
• DOI: 10.1186/s12903-023-03233-2

The accuracy of intraoral scanning plays a crucial role in the workflow of computer-assisted design/computer-assisted manufacturing. However, data regarding scanning accuracy for inlay preparation designs are lacking. The purpose of this in vitro study was to evaluate the influence of the depth of the occlusal cavity and width of the gingival floor of the proximal box on the trueness and precision of intraoral scans for inlay restoration. Artificial teeth were used in this study. Four types of preparations for mesio-occlusal inlay were performed on each #36 artificial tooth depending on two different depths of the occlusal cavity (1 mm and 2 mm) and widths of the gingival floor of the proximal box (1.5 mm and 2.5 mm). Artificial teeth were scanned 10 times each with Cerec Primescan AC, and another scan was performed subsequently with a laboratory scanner as a reference (n = 10). Standard tessellation language files were analyzed using a three-dimensional analysis software program. Experimental data were analyzed using two-way analysis of variance and the Bonferroni multiple comparison test. The narrow shallow group had significantly higher deviation values for trueness than the wide deep group (p  0.05). For the mean maximum positive deviation, the wide groups had significantly lower values than the narrow groups (p