Effect of shape and size of implant scan body on scanning accuracy: An in vitro study.

Autor: Pan Y; Department of Dentistry, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, PR China., Dai X; Department of Dentistry, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, PR China., Tsoi JK; Faculty of Dentistry, The University of Hong Kong, Hong Kong special administrative region, PR China., Lam WY; Faculty of Dentistry, The University of Hong Kong, Hong Kong special administrative region, PR China., Pow EH; Faculty of Dentistry, The University of Hong Kong, Hong Kong special administrative region, PR China. Electronic address: ehnpow@hku.hk.
Jazyk: angličtina
Zdroj: Journal of dentistry [J Dent] 2025 Jan; Vol. 152, pp. 105498. Date of Electronic Publication: 2024 Dec 01.
DOI: 10.1016/j.jdent.2024.105498
Abstrakt: Objectives: Evaluating the effect of shape and size of implant scan body on the accuracy of optical 3D scanning.
Materials and Methods: Fifteen PEEK scan bodies were milled, including 1 spherical, 9 cylindrical, and 5 cuboidal. The 3D position and angulation of each scan body were measured using a CMM 3 times and a laboratory scanner 10 times. The linear and angular trueness and precision of the scans were calculated by comparing with the CMM measurements.
Results: The linear accuracy of the cylindrical scan bodies (9.5 ± 6.2 µm) was significantly higher than those of the cuboidal (17.7 ± 8.1 µm) and spherical scan bodies (12.5 ± 6.5 µm). The cuboidal (0.050±0.009°) showed significantly better angular accuracy than the cylindrical (0.065±0.040°). In the cylindrical group, the narrow (∅4.8 mm) demonstrated significantly inferior accuracy than the wider (∅5.5 mm and ∅6.5 mm)(p = 0.003). The tall (12 mm) showed significantly higher angular trueness than the shorter (8 and 4 mm)(p < 0.001). In the cuboidal group, the 24 mm 2 exhibited significantly poorer angular trueness compared to the 18 mm 2 and 30 mm 2 (p < 0.001) CONCLUSIONS: The shape and size of the implant scan body significantly affect the scanning accuracy. Spherical scan bodies cannot transfer implant angulation. Scan bodies with a size of >∅4.8 mm and >8 mm seem accurate for transferring the 3D implant position.
Clinical Significance: The shape and size of scan bodies directly influence the accuracy of 3D scanning. Well-designed scan bodies offer better transfer results, which is crucial for ensuring passive fit of implant prostheses and improving long-term clinical outcomes.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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