| Title: | Eight-year clinical performance of cantilevered zirconia resin-bonded fixed dental prostheses : a randomized controlled trial evaluating the effect of nanostructured alumina coating |
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| Authors: | ID Malgaj, Tine (Author)
ID Kocjan, Andraž, Institut "Jožef Stefan" (Author)
ID Özcan, Mutlu (Author)
ID Jevnikar, Peter (Author) |
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| Files: |  URL - Source URL, visit https://onlinelibrary.wiley.com/doi/10.1111/jerd.70130
 PDF - Presentation file, download (1,11 MB)
MD5: 279D32C14442C3C02CF1A32239C47008
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | Objective. To evaluate the clinical performance of cantilevered zirconia resin-bonded fixed dental prostheses (RBFDPs) pretreated with nanostructured alumina coating (NAC) as a non-invasive surface modification alternative to airborne-particle abrasion (APA). Materials and Methods. In this prospective, randomized, controlled clinical trial, 57 patients requiring replacement of a maxillary or mandibular incisor received 64 zirconia RBFDPs, randomly assigned to APA (n = 32) or NAC (n = 32) groups. APA surfaces were air-abraded with 50-μm alumina, whereas NAC surfaces were coated with NAC. Restorations were further classified by pontic position. Retention and survival rates were analyzed using Kaplan–Meier and log-rank tests; patient-specific factors were assessed with Mann–Whitney U and Fisher's exact tests (α = 0.05). Debonded surfaces were examined under scanning electron microscopy. Results. Over a mean observation period of 61.4 ± 22.1 months (range, 8.3–97.4 months), six debondings occurred, corresponding to an overall survival rate of 100% and retention rates of 88.4% for NAC and 89.1% for APA (p = 0.99), with no significant differences among pontic groups (p = 0.18). Failures were predominantly adhesive, characterized by partial coating delamination at the NAC–zirconia interface. Conclusions. NAC-pretreated zirconia RBFDPs achieved mid- to long-term retention comparable to APA and represent a minimally invasive, clinically reliable pretreatment alternative. Clinical Significance. NAC provides a minimally invasive zirconia pretreatment, particularly for RBFDPs fabricated from damage-prone translucent zirconia, mitigating mechanical failures while maintaining long-term retention comparable to APA. |
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| Keywords: | nanostructured alumina coating |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 24.01.2026 |
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| Article acceptance date: | 10.02.2026 |
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| Publication date: | 27.02.2026 |
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| Publisher: | Wiley |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 1-9 |
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| Numbering: | Vol. 38, iss. |
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| Source: | Kanada |
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| PID: | 20.500.12556/DiRROS-28221  |
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| UDC: | 620.1/.2 |
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| ISSN on article: | 1708-8240 |
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| DOI: | 10.1111/jerd.70130 |
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| COBISS.SI-ID: | 271258371 |
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| Copyright: | © 2026 The Author(s). |
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| Note: | Nasl. z nasl. zaslona;
Soavtorja iz Slovenije: Andraž Kocjan, Peter Jevnikar;
Opis vira z dne 11. 3. 2026;
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| Publication date in DiRROS: | 12.03.2026 |
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| Views: | 44 |
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| Downloads: | 46 |
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