Surface conditioning of a composite used for inlay/onlay restorations: Effect on μTBS to resin cement
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
Purpose: To assess the effect of the composite surface conditioning on the microtensile bond strength of a resin cement to a composite used for inlay/onlay restorations. Materials and Methods: Forty-two blocks (6 × 6 × 4 mm) of a microfilled composite (Vita VMLC) were produced and divided into 3 groups (N = 14) by composite surface conditioning methods: Gr1 - etching with 37% phosphoric acid, washing, drying, silanization; Gr2 - air abrasion with 50-l̀m Al2O3 particles, silanization; Gr3 - chairside tribochemical silica coating (CoJet System), silanization. Single-Bond (one-step adhesive) was applied on the conditioned surfaces and the two resin blocks treated with the same method were cemented using RelyX ARC (dual-curing resin cement). The specimens were stored for 7 days in water at 37°C and then sectioned to produce nontrimmed beam samples, which were submitted to microtensile bond strength testing (μTBS). For statistical analysis (one-way ANOVA and Tukey's test, · = 0.05), the means of the beam samples from each luted specimen were calculated (n = 7). Results: μTBS values (MPa) of Gr2 (62.0 ± 3.9a) and Gr3 (60.5 ± 7.9a) were statistically similar to each other and higher than Gr1 (38.2 ± 8.9b). The analysis of the fractured surfaces revealed that all failures occurred at the adhesive zone. Conclusion: Conditioning methods with 50-l̀m Al2O3 or tribochemical silica coating allowed bonding between resin and composite that was statistically similar and stronger than conditioning with acid etching.
Descrição
Palavras-chave
Composite , Inlay , Microtensile bond strength , Surface conditioning , Tribochemical silica coating , aluminum oxide , bisphenol A bis(2 hydroxypropyl) ether dimethacrylate , dentin bonding agent , ESPE bonding system , macrogol derivative , phosphoric acid , polymethacrylic acid derivative , RelyX ARC , resin , resin cement , silane derivative , silicon dioxide , single bond , unclassified drug , water , adhesion , chemistry , dental acid etching , dental bonding , dental etching , dental surgery , human , materials testing , mechanical stress , surface property , temperature , tensile strength , Acid Etching, Dental , Adhesiveness , Aluminum Oxide , Bisphenol A-Glycidyl Methacrylate , Composite Resins , Dental Bonding , Dental Etching , Dentin-Bonding Agents , Humans , Inlays , Materials Testing , Phosphoric Acids , Polyethylene Glycols , Polymethacrylic Acids , Resin Cements , Silanes , Silicon Dioxide , Stress, Mechanical , Surface Properties , Temperature , Tensile Strength , Water
Idioma
Inglês
Citação
Journal of Adhesive Dentistry, v. 9, n. 6, p. 495-498, 2007.
