The effect of surface treatment on bond strength of layering porcelain and hybrid composite bonded to zirconium dioxide ceramics
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概要
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Purpose: The purpose of this study was to investigate the differences between Rocatec (as surface treatment) and #600 polishing (as control) on shear bond strength of layering porcelain and hybrid composite to zirconium dioxide ceramics.Methods: Manufactured zirconia blocks used in this study were yttrium partially stabilized zirconia (YTZ®), and veneering materials were NobelRondo Zirconia Dentin A2 High Value (NZR) and Estenia C&B (ES). Total 48 zirconia blocks were fabricated (10 mm × 10 mm × 20 mm). The blocks of 24 each were treated by Rocatec and #600 paper, respectively. Surface treated zirconia blocks were divided into two groups, according to veneering materials of NZR and ES. NZR was fired and ES was polymerized to zirconia. The fabricated specimen was fixed to mounting jig and applied shear force using the universal testing machine at a crosshead speed of 0.5 mm/min. All results were statistically analyzed by two-way ANOVA and Tukeys test. EPMA analysis and SPM analysis of specimen interface were carried out.Results: Mean shear bond strength of each condition was: NZR/#600; 23.3 (S.D. ±7.0) MPa, NZR/Rocatec; 26.9 (S.D. ±7.0) MPa, ES/#600; 10.7 (S.D. ± 2.4) MPa, ES/Rocatec; 12.5 (S.D. ± 0.8) MPa.Conclusions: From the results of this study, shear bond strength of layering porcelain to zirconia was higher than that of restorative hybrid resin. However the more study will be needed, the appropriate choice of materials became the gides to the expansion of the applied cases of metal-free prothesis.
- 社団法人 日本補綴歯科学会の論文
著者
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Gomi Harunori
Department Of Crown And Bridge School Of Life Dentistry At Tokyo The Nippon Dental University
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Shinya Akiyoshi
Department Of Crown And Bridge School Of Life Dentistry At Tokyo The Nippon Dental University
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Yokoyama Daiichiro
Department Of Crown And Bridge School Of Life Dentistry At Tokyo The Nippon Dental University
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VALLITTU Pekka
Department of Biomaterials Science and BioCity Turku Biomaterials Research Program, Institute of Dentistry, University of Turku
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SHINYA Akikazu
Department of Biomaterials Science and BioCity Turku Biomaterials Research Program, Institute of Dentistry, University of Turku
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Hatta Minori
Department of Crown and Bridge, The Nippon Dental University, School of Life Dentistry at Tokyo
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