Influence of different multilayer zirconia materials on the in vitro load-bearing capacity of resin-bonded fixed partial dentures in the posterior region
Objective Comparison of the load-bearing capacity and failure pattern of posterior resin-bonded fixed partial dentures (RBFPDs) differing in retainer design, zirconia material, and vertical nesting position. Materials and Methods RBFPDs replacing a maxillary first molar were fabricated with 2 retain...
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| Autori principali: | , , , , |
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| Natura: | Article (Journal) |
| Lingua: | inglese |
| Pubblicazione: |
2026
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| In: |
Journal of esthetic and restorative dentistry
Year: 2026, Pages: ? |
| ISSN: | 1708-8240 |
| DOI: | 10.1111/jerd.70191 |
| Accesso online: | Verlag, kostenfrei, Volltext: https://doi.org/10.1111/jerd.70191 Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1111/jerd.70191 
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| Note sull'autore: | Moritz Waldecker, Maria Sophie Heller, Stefan Rues, Peter Rammelsberg, Wolfgang Bömicke |
| Riassunto: | Objective Comparison of the load-bearing capacity and failure pattern of posterior resin-bonded fixed partial dentures (RBFPDs) differing in retainer design, zirconia material, and vertical nesting position. Materials and Methods RBFPDs replacing a maxillary first molar were fabricated with 2 retainer designs (inlay-retained, IR; wing-retained, WR) and of 2 multilayer zirconia materials (3Y-TZP and 5Y-PSZ, 3Y/5Y; 5Y-PSZ, 5Y). For 3Y/5Y blanks, 2 vertical nesting positions (center; top) were evaluated. For each group, 16 monolithic RBFPDs were fabricated. Half of the RBFPDs underwent artificial aging. Load-bearing capacity (Fu) was tested under oblique loading. The data were statistically analyzed using Welch ANOVA and Dunnett-T3 post hoc tests (α = 0.05). Results No decementations or defects were observed after aging. Mean Fu ranged between 684 and 1216 N for IR-RBFPDs and 1025-1617 N for WR-RBFPDs. There was a clear hierarchy between the subgroups, with the lowest Fu recorded for restorations made of 5Y zirconia and the highest Fu for restorations fabricated from a centric position in 3Y/5Y blanks. Aging had no influence (p ≥ 0.526). Conclusions Posterior RBFPDs made of multilayer 3Y-TZP/5Y-PSZ zirconia can be recommended for clinical trials. Vertical positioning in the blank influences the safety margin of the load-bearing capacity. The use of 5Y-PSZ should be critically scrutinized for this indication. Clinical Significance Posterior resin-bonded fixed partial dentures made of monolithic zirconia (3Y-TZP) are a valuable treatment option. The opacity of the restorations limits their esthetics. Multilayer zirconia materials with color and/or material gradient can further improve the esthetics of monolithic zirconia restorations. Resin-bonded fixed partial dentures made of multilayer zirconia materials differing in color and/or material gradient might be a viable alternative to restorations made of 3Y-TZP zirconia in the posterior region. |
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| Descrizione del documento: | Gesehen am 21.07.2026 |
| Descrizione fisica: | Online Resource |
| ISSN: | 1708-8240 |
| DOI: | 10.1111/jerd.70191 |