Eight-year clinical performance of cantilevered zirconia resin-bonded fixed dental prostheses : a randomized controlled trial evaluating the effect of nanostructured alumina coating

Malgaj, Tine (avtor), Kocjan, Andraž (avtor), Özcan, Mutlu (avtor), Jevnikar, Peter (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: airborne-particle abrasion, bond strength, nanostructured alumina coating, randomized controlled clinical trial, resin-bonded fixeddental prostheses, zirc
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: MF - Medicinska fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: Str. 1386-1394
• Številčenje: Vol. 38, iss. 7
• PID: 20.500.12556/RUL-184596
• UDK: 620.1/.2
• ISSN pri članku: 1708-8240
• DOI: 10.1111/jerd.70130
• COBISS.SI-ID: 271258371
• Datum objave v RUL: 10.07.2026

Gradivo je del revije

• Naslov: Journal of esthetic and restorative dentistry
• Založnik: Wiley
• ISSN: 1708-8240
• COBISS.SI-ID: 3185684

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0087
• Naslov: Keramični in komplementarni materiali za napredne inženirske in biomedicinske aplikacije

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: J3-3064
• Naslov: Predklinične in Klinične Raziskave Cirkonijeve Oksidne Dentalne Keramike Izdelane s Tehnologijami Aditivnega Oblikovanja (ZIRAMDENT)