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- Title
Effect of resin cement selection on the microtensile bond strength of adhesively veneered 3Y-TZP.
- Authors
Zhao, Jing; Wang, Xinzhi; Si, Wenjie; Shen, Zhijian
- Abstract
Objective. The aim of this study was to investigate the effect of resin cement selection on the microtensile bond strength (μTBS) of adhesively veneered 3Y-TZP. Materials and methods. 3Y-TZP discs were fabricated from commercial powders and treated by sandblasting and zirconia primer. Porcelain discs were sectioned from a feldspathic block and conditioned with 5% HF and silane agent. Pre-treated surfaces of zirconia and porcelain discs were bonded together using one of the three following resin cements: Multilink N (MN), Panavia F (PA) or RelyX Unicem (RU), respectively. After light-curing the joined discs were cut into microbars where 15 microbars per group were randomly chosen for μTBS test until failure occurred (24 h storage in water in advance, crosshead speed of 0.5 mm/min). The data were analysed by one-way ANOVA and Tukey's test ( p < 0.05). Fractured zirconia surfaces were examined using both a stereomicroscope and scanning electron microscope to identify the failure mode. Results. Significant differences in the μTBS values among three groups were found ( p < 0.001) and the descending order was PA, RU and MN. No zirconia or feldspathic failure occurred, but the zirconia/cement interfaces suffered from fracture for all samples. Cement cohesive failure and/or feldspathic/cement interfacial failure sometimes were involved. Failures were mainly adhesive for RU, while they were mixed for MN and PA. Conclusion. When using the adhesive veneering method, Panavia F offers better bond strength than Multilink N or RelyX Unicem, which is probably due to the content of the 10-methacryloyloxydecyl dihydrogenphosphate (10-MDP) monomer.
- Subjects
DENTAL resins; DENTAL cements; DENTAL bonding; DENTAL veneers; ADHESION; ZIRCONIUM oxide; BOND strengths; CAD/CAM systems
- Publication
Acta Odontologica Scandinavica, 2013, Vol 71, Issue 5, p1105
- ISSN
0001-6357
- Publication type
Article
- DOI
10.3109/00016357.2012.749516