Scanning Accuracy of Bracket Features and Slot Base Angle in Different Bracket Materials by Four Intraoral Scanners: An In Vitro Study

Shin, Seon-Hee; Yu, Hyung-Seog; Cha, Jung-Yul; Kwon, Jae-Sung; Hwang, Chung-Ju

doi:10.3390/ma14020365

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Scanning Accuracy of Bracket Features and Slot Base Angle in Different Bracket Materials by Four Intraoral Scanners: An In Vitro Study

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and

Chung-Ju Hwang

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Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul 03722, Korea

Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Korea

BK21 FOUR Project, Yonsei University College of Dentistry, Seoul 03722, Korea

Author to whom correspondence should be addressed.

Materials 2021, 14(2), 365; https://doi.org/10.3390/ma14020365

Received: 9 December 2020 / Revised: 8 January 2021 / Accepted: 8 January 2021 / Published: 13 January 2021

(This article belongs to the Special Issue State-of-the-Art Biomaterials in Korea)

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Abstract

The accurate expression of bracket prescription is important for successful orthodontic treatment. The aim of this study was to evaluate the accuracy of digital scan images of brackets produced by four intraoral scanners (IOSs) when scanning the surface of the dental model attached with different bracket materials. Brackets made from stainless steel, polycrystalline alumina, composite, and composite/stainless steel slot were considered, which have been scanned from four different IOSs (Primescan, Trios, CS3600, and i500). SEM images were used as references. Each bracket axis was set in the reference scan image, and the axis was set identically by superimposing with the IOS image, and then only the brackets were divided and analyzed. One-way analysis of variance (ANOVA) was used to compare the differences. The difference between the manufacturer’s nominal torque and bracket slot base angle was 0.39 in SEM, 1.96 in Primescan, 2.04 in Trios, and 5.21 in CS3600 (p < 0.001). The parallelism, which is the difference between the upper and lower angles of the slot wall, was 0.48 in SEM, 7.00 in Primescan, 5.52 in Trios, 6.34 in CS3600, and 23.74 in i500 (p < 0.001). This study evaluated the accuracy of the bracket only, and it must be admitted that there is some error in recognizing slots through scanning in general. View Full-Text

Keywords: intraoral scanner; orthodontic bracket; accuracy; precision; trueness

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MDPI and ACS Style

Shin, S.-H.; Yu, H.-S.; Cha, J.-Y.; Kwon, J.-S.; Hwang, C.-J. Scanning Accuracy of Bracket Features and Slot Base Angle in Different Bracket Materials by Four Intraoral Scanners: An In Vitro Study. Materials 2021, 14, 365. https://doi.org/10.3390/ma14020365

AMA Style

Shin S-H, Yu H-S, Cha J-Y, Kwon J-S, Hwang C-J. Scanning Accuracy of Bracket Features and Slot Base Angle in Different Bracket Materials by Four Intraoral Scanners: An In Vitro Study. Materials. 2021; 14(2):365. https://doi.org/10.3390/ma14020365

Chicago/Turabian Style

Shin, Seon-Hee, Hyung-Seog Yu, Jung-Yul Cha, Jae-Sung Kwon, and Chung-Ju Hwang. 2021. "Scanning Accuracy of Bracket Features and Slot Base Angle in Different Bracket Materials by Four Intraoral Scanners: An In Vitro Study" Materials 14, no. 2: 365. https://doi.org/10.3390/ma14020365

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Scanning Accuracy of Bracket Features and Slot Base Angle in Different Bracket Materials by Four Intraoral Scanners: An In Vitro Study

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