Capturing of interdental areas with digital and conventional impression systems and their impact on automatic tooth segmentation in CAD software: an in vitro study
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Le résumé fourni par la source
OBJECTIVES: This in vitro study evaluated and compared the accuracy of digital versus conventional impression systems in reproducing interdental areas (IAs) of periodontally compromised dentitions (PCDs) and examined how impression quality influences automated tooth segmentation in CAD software. MATERIALS AND METHODS: A standardized PCD model was captured with one conventional polyvinylsiloxane impression (CVI), four wireless intra‑oral scanners (IOS) - Dexis IS 3800 W (3800‑wl), Medit i700w (i700‑wl), Primescan 2 (PRI2‑wl), Trios 5 (TRI5‑wl) - and a wired Primescan AC (PRI1‑w). Raw scan data, digitally mounted casts after scan‑repair, and digital casts after tooth segmentation in OnyxCeph were analyzed. IA reproduction accuracy and segmentation quality were statistically compared using the Median test and Chi‑squared test (p < 0.05). RESULTS: All IOS reproduced IAs significantly more accurately than the CVI (p < 0.001). Among IOS, PRI2‑wl achieved > 80% correct IA reproduction, whereas 3800‑wl and TRI5‑wl fell short by up to 20%. Scan‑repair marginally improved IA capture for some IOS, while the conventional impression showed no change. Segmentation errors clustered in teeth with pronounced gingival recession; healthy gingiva yielded higher accuracy. Significant differences between raw and segmented data were found for TRI5‑wl (p = 0.027) and 3800‑wl (p = 0.044). CONCLUSIONS: Within the limits of this in vitro study, IOS outperform conventional impressions for IA reproduction in PCDs. Accuracy varies among IOS and is linked to raw‑scan quality. Automated segmentation is reliable for teeth with healthy gingiva but is challenged by periodontal defects. CLINICAL RELEVANCE: Precise IA capture enhances orthodontic movement planning and streamlines CAD‑based workflows, reducing manual corrections and improving outcomes for patients with compromised periodontium.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Capturing of interdental areas with digital and conventional impression systems and their impact on automatic tooth segmentation in CAD software: an in vitro study
- Date Crossref
- 07/08/2026
- Éditeur
- Springer Science and Business Media LLC
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Justus-Liebig-Universität Gießen pays non établi dans la noticeUniversité ou école supérieure
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Christian-Albrechts-Universität zu Kiel pays non établi dans la noticeUniversité ou école supérieure
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University Hospital Schleswig-Holstein pays non établi dans la noticeÉtablissement de santé
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University of Lübeck pays non établi dans la noticeUniversité ou école supérieure
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Dental Clinic of the Justus Liebig University Giessen Department of Orthodontics pays non établi dans la noticeUniversité ou école supérieure
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Private Dental Practice pays non établi dans la noticeInstitution
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Christian Albrecht University of Kiel Department of Prosthodontics pays non établi dans la noticeUniversité ou école supérieure
Justus-Liebig-Universität Gießen, Christian-Albrechts-Universität zu Kiel et University Hospital Schleswig-Holstein, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.