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metadata.dc.type: | Artigo de Periódico |
Title: | Durability of Resin Cement Bond to Aluminium Oxide and Zirconia Ceramics after Air Abrasion and Laser Treatment |
Other Titles: | Journal of Prosthodontics |
Authors: | Foxton, Richard M. Cavalcanti, Andrea Araújo de Nóbrega Nakajima, Masatoshi Pilecki, Peter Sherriff, Martyn Melo, Luciana Watson, Timothy F. |
metadata.dc.creator: | Foxton, Richard M. Cavalcanti, Andrea Araújo de Nóbrega Nakajima, Masatoshi Pilecki, Peter Sherriff, Martyn Melo, Luciana Watson, Timothy F. |
Abstract: | Purpose: The erbium laser has been introduced for cutting enamel and dentin and may have an application in the surface modification of high-strength aluminum oxide and zirconia ceramics. The aim of this study was to evaluate the durability of the bond of conventional dual-cured resin cements to Procera Al2O3 and zirconium oxide ceramics after surface treatment with air abrasion and erbium laser. Materials and Methods: One hundred twenty Al2O3 and 120 zirconia specimens measuring 3 × 3 × 0.7 mm3 were divided equally into three groups, and their surfaces treated as follows: either untreated (controls), air abraded with Al2O3 particles, or erbium-laser-treated at a power setting of 200 mJ. The surface of each specimen was then primed and bonded with one of two dual-cured resin cements (either SCP-100 Ceramic Primer and NAC-100 or Monobond S and Variolink II) using a 1-mm thick Tygon tube mold with a 0.75-mm internal bore diameter. After 24 hours and 6 months of water storage at 37◦C, a microshear bond strength test was performed at a crosshead speed of 1 mm/min. Surface morphology was examined using a confocal microscope, and failure modes were observed using an optical microscope. The data were analyzed using the Kaplan-Meier nonparametric survival analysis. Results: In the case of zirconia, air abrasion and Erbium:yttrium-aluminum-garnet (Er:YAG) laser treatment of the ceramic surface resulted in a significant reduction in the bond strengths of both resin cements after 6 months water storage; however, when the zirconia surface was left untreated, the SCP-100/NAC-100 group did not significantly reduce in bond strength. In the case of alumina, no treatment, air abrasion and Er:YAG laser treatment of the surface led to no significant reduction in the bond strengths of the three SCP-100/NAC-100 groups after 6 months water storage, whereas all three Monobond S/Variolink II groups showed a significant reduction. Conclusion: Er:YAG laser treatment of the zirconia surface did not result in a durable resin cement/ceramic bond; however, a durable bond between a conventional dual- cured resin cement and Procera All Ceram and Procera All Zirkon was formed using a ceramic primer containing the phosphate monomer, MDP, without any additional surface treatment. |
Keywords: | Durability resin cement alumina zirconia adhesion air abrasion laser bond strength |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/5493 |
Issue Date: | 2011 |
Appears in Collections: | Artigo Publicado em Periódico (Faculdade de Odontologia) |
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Durability of Resin Cement Bond to Aluminium Oxide and.pdf Restricted Access | 320,37 kB | Adobe PDF | View/Open Request a copy |
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