Effect of different span lengths with different total occlusal convergences on the accuracy of intraoral scanners
© 2023 by the American College of Prosthodontists..
PURPOSE: The aim was to assess the effect of span lengths and total occlusal convergence (TOC) on the accuracy of intraoral scanners.
MATERIALS AND METHODS: Two typodont acrylic teeth models were prepared to receive fixed dental prostheses with three different span lengths. Span 1: between maxillary canines; span 2: between maxillary second premolars; and span 3: between maxillary second molars. In the first model, prepared teeth had a TOC of 12°, whereas, in the second model, teeth had a TOC of 20°. Each model was scanned 10 times using 4 different intraoral scanners (Omnicam, Primescan, Trios 4, and Medit i500). The STL files from the scans were compared to the reference models (trueness) and within each test group (precision) using a 3D comparison software. Data were then statistically analyzed.
RESULTS: Regarding trueness, no significant differences were found among Primescan (32.58 ± 13.08), Trios 4 (32.33 ± 12.19), and Medit i500 (32.26 ± 9.57). However, all showed significantly better trueness than Omnicam (35.70 ± 8.35) (p < 0.001). The highest values were found in scans between the second molars (47.42 ± 3.94), followed by scans between second premolars (28.42 ± 3.78), and the highest trueness was found in scans between the canines (23.80 ± 3.85). For TOC, 12° had a significantly higher value than 20° (p < 0.001). Regarding precision, the highest values were found with Omnicam (29.84 ± 3.89), followed by Medit i500 (28.04 ± 2.94), then Trios 4 (25.64 ± 3.11), and Primescan (24.69 ± 5.25). The highest values and least precision were found in scans between the second molars (28.97 ± 5.27) and scans between second premolars (27.59 ± 3.97), whereas the highest precision was found in scans between the canines (24.60 ± 2.04). For TOC, 12° had significantly higher values than 20° (p < 0.001).
CONCLUSIONS: Intraoral scans are directly affected by scanner type, TOC, and scan spans. All tested scanners showed clinically acceptable results even for long-span restorations.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:33 |
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| Enthalten in: |
Journal of prosthodontics : official journal of the American College of Prosthodontists - 33(2024), 3 vom: 28. März, Seite 252-258 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Yehia, Ashraf [VerfasserIn] |
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| Links: |
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| Themen: |
Digital dentistry |
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| Anmerkungen: |
Date Completed 13.03.2024 Date Revised 13.03.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1111/jopr.13686 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM354931105 |
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| 100 | 1 | |a Yehia, Ashraf |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Effect of different span lengths with different total occlusal convergences on the accuracy of intraoral scanners |
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| 500 | |a Date Revised 13.03.2024 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a © 2023 by the American College of Prosthodontists. | ||
| 520 | |a PURPOSE: The aim was to assess the effect of span lengths and total occlusal convergence (TOC) on the accuracy of intraoral scanners | ||
| 520 | |a MATERIALS AND METHODS: Two typodont acrylic teeth models were prepared to receive fixed dental prostheses with three different span lengths. Span 1: between maxillary canines; span 2: between maxillary second premolars; and span 3: between maxillary second molars. In the first model, prepared teeth had a TOC of 12°, whereas, in the second model, teeth had a TOC of 20°. Each model was scanned 10 times using 4 different intraoral scanners (Omnicam, Primescan, Trios 4, and Medit i500). The STL files from the scans were compared to the reference models (trueness) and within each test group (precision) using a 3D comparison software. Data were then statistically analyzed | ||
| 520 | |a RESULTS: Regarding trueness, no significant differences were found among Primescan (32.58 ± 13.08), Trios 4 (32.33 ± 12.19), and Medit i500 (32.26 ± 9.57). However, all showed significantly better trueness than Omnicam (35.70 ± 8.35) (p < 0.001). The highest values were found in scans between the second molars (47.42 ± 3.94), followed by scans between second premolars (28.42 ± 3.78), and the highest trueness was found in scans between the canines (23.80 ± 3.85). For TOC, 12° had a significantly higher value than 20° (p < 0.001). Regarding precision, the highest values were found with Omnicam (29.84 ± 3.89), followed by Medit i500 (28.04 ± 2.94), then Trios 4 (25.64 ± 3.11), and Primescan (24.69 ± 5.25). The highest values and least precision were found in scans between the second molars (28.97 ± 5.27) and scans between second premolars (27.59 ± 3.97), whereas the highest precision was found in scans between the canines (24.60 ± 2.04). For TOC, 12° had significantly higher values than 20° (p < 0.001) | ||
| 520 | |a CONCLUSIONS: Intraoral scans are directly affected by scanner type, TOC, and scan spans. All tested scanners showed clinically acceptable results even for long-span restorations | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a digital dentistry | |
| 650 | 4 | |a fixed prosthodontics | |
| 650 | 4 | |a intraoral scanners | |
| 650 | 4 | |a span length | |
| 650 | 4 | |a total occlusal convergence | |
| 700 | 1 | |a Abo El Fadl, Ahmad |e verfasserin |4 aut | |
| 700 | 1 | |a El Sergany, Omar |e verfasserin |4 aut | |
| 700 | 1 | |a Ebeid, Kamal |e verfasserin |4 aut | |
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