Accuracy of intraoral scans: an in vivo study of different scanning devices
Abstract: Statement of problem
The accuracy of intraoral scanners is a prerequisite for the fabrication of dental restorations in computer-aided design and computer-aided manufacturing (CAD-CAM) dentistry. While the precision of intraoral scanners has been investigated in vitro, clinical data on the accuracy of intraoral scanning (IOS) are limited.
Purpose
The purpose of this clinical study was to determine the accuracy of intraoral scanning with different devices compared with extraoral scanning.
Material and methods
An experimental appliance was fabricated for 11 participants and then scanned intraorally and extraorally with 3 different intraoral scanners and a reference scanner. Intraoral and extraoral scans were subdivided into complete-arch and short-span scans and compared with the reference scan to assess trueness. Repeated scans in each group were assessed for precision.
Results
Precision and trueness were higher for extraoral scans compared with intraoral scans, except for complete-arch scans with 1 intraoral scanner. The median precision of short-span scans was higher (extraoral: 22 to 29 μm, intraoral: 23 to 43 μm) compared with complete-arch scans (extraoral: 81 to 165 μm, intraoral: 80 to 198 μm). The median trueness of short-span scans (extraoral: 28 to 40 μm, intraoral: 38 to 47 μm) was higher than that of complete-arch scans (extraoral: 118 to 581 μm, intraoral: 147 to 433 μm) for intraoral and extraoral scanning.
Conclusions
Intraoral conditions negatively influenced the accuracy of the scanning devices, which was also reduced for the complete-arch scans
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Notes
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The journal of prosthetic dentistry. - 128, 6 (2022) , 1303-1309, ISSN: 0022-3913
- Event
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Veröffentlichung
- (where)
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Freiburg
- (who)
-
Universität
- (when)
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2021
- Creator
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Kernen, Florian
Schlager, Stefan
Seidel Alvarez, Veronica
Mehrhof, Jürgen
Vach, Kirstin
Kohal, Ralf-Joachim
Nelson, Katja
Flügge, Tabea Viktoria
- DOI
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10.1016/j.prosdent.2021.03.007
- URN
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urn:nbn:de:bsz:25-freidok-2181215
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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25.03.2025, 1:57 PM CET
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Kernen, Florian
- Schlager, Stefan
- Seidel Alvarez, Veronica
- Mehrhof, Jürgen
- Vach, Kirstin
- Kohal, Ralf-Joachim
- Nelson, Katja
- Flügge, Tabea Viktoria
- Universität
Time of origin
- 2021
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