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. 2024 Dec;19(Suppl 2):S116-S121.
doi: 10.1016/j.jds.2024.07.016. Epub 2024 Jul 27.

Accuracy of intraoral scanners in maxillary multiple restorations: An in vitro study

Hlaing Myint Myat Aung  1 , Thu Ya Linn  1 , Wei-Fang Lee  2 , Jen-Chih Chao  2   3 , Nai-Chia Teng  1   4 , Ting-Yi Renn  1 , Wei-Jen Chang  1   5
Affiliations

Accuracy of intraoral scanners in maxillary multiple restorations: An in vitro study

Hlaing Myint Myat Aung et al. J Dent Sci. 2024 Dec.

Abstract

Background/purpose: The accuracy of intraoral scanners (IOSs) plays a crucial role in the success of final restorations in digital workflows. Previous studies have shown that numerous factors affect the accuracy of IOSs. Most studies have evaluated the accuracy of IOS under one restoration condition. Therefore, the aim of this study was to evaluate the accuracy of two IOSs with different data acquisition methods across multiple restorations.

Materials and methods: A partially edentulous model with preparations were created and scanned using the laboratory scanner E4 as the reference model. Two IOSs, Trios 3 and Virtuo Vivo, were used in this study. Each scan was performed in same scanning strategy. Trueness and precision of each scan was compared by surface-matching software, and the data were statistically analyzed.

Results: Trios 3 showed no significant difference in trueness of full arch, single crown, and edentulous area, except for 3-unit bridge area than Virtuo Vivo (P = 0.008). However, Virtuo Vivo showed better precision than Trios 3 (P = 0.003). There was no differ in linear dental measurements between two scanners.

Conclusion: We found Trios 3 had better trueness in 3-unit bridge area compared to Virto Vivo, but there was no significant difference in the other preparation areas. While Virtuo Vivo showed better precision. Our results can provide insights for the selection of IOSs for various restorations in clinical practice. However, this is an in vitro study, the chairside challenges of IOSs should be considered.

Keywords: Accuracy; Digital impression; Intraoral scanner; Precision; Trueness.

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Conflict of interest statement

The authors have declared that there are no competing interests.

Figures

Figure 1
Figure 1
Scanning strategy used in the study.
Figure 2
Figure 2
Surface matching color map of trueness in full arch scan of (A) Trios 3 and (B) Virtuo Vivo. (C) Boxplot of superimposition of reference scan among different scanners.
Figure 3
Figure 3
(A) The trueness evaluation of segmental surface matching color map in single crown area. (B) Boxplot of superimposition to reference scan in Trios 3 and Virtuo Vivo.
Figure 4
Figure 4
(A) The trueness evaluation of segmental surface matching color map in 3-unit bridge area. (B) Boxplot of superimposition to reference scan in Trios 3 and Virtuo Vivo. ∗∗: P < 0.01.
Figure 5
Figure 5
(A) The trueness evaluation of segmental surface matching color map in canine to canine area. (B) Boxplot of superimposition to reference scan in Trios 3 and Virtuo Vivo.
Figure 6
Figure 6
Boxplot of precision of full arch scan in TRIOS 3 and Virtuo Vivo. ∗∗: P < 0.01.
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