Effect of dentinal surface preparation on bond strength of self-etching adhesive systems

• Autor(a) principal: Rocha, Patricia Itocazo [UNESP]
• Data de Publicação: 2006
• Outros Autores: Borges, Alessandra Bühler [UNESP], Rodrigues, José Roberto [UNESP], Arrais, César Augusto Galvão [UNESP], Giannini, Marcelo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S1806-83242006000100010; http://hdl.handle.net/11449/68904
• topic: Dentin; Dentin-bonding agents; Tensile strength; adhesive agent; Clearfil SE Bond; dentin bonding agent; methacrylic acid derivative; One Up Bond F; One-Up-Bond F; resin cement; chemistry; dental acid etching; dental bonding; dentin; drug effect; human; materials testing; shear strength; Acid Etching, Dental; Adhesives; Dental Bonding; Dentin-Bonding Agents; Humans; Materials Testing; Methacrylates; Resin Cements; Shear Strength

The aim of this study was to evaluate the effects of dentin surface treatments on the tensile bond strength (TBS) of the self-etching primer Clearfil SE Bond (CSE) and the one-step self-etching One-Up Bond F (OUB). The exposed flat dentin surfaces of twenty-four sound third molars were prepared with diamond bur at high-speed, carbide bur at low-speed or wet ground with #600 grit SiC paper. The adhesive systems were applied to the dentin surfaces and light-cured according to the manufacturers' instructions. A 6-mm high composite crown was incrementally built-up and each increment was light-cured for 40 seconds. After being stored in water (37°C/24 h), the samples were serially sectioned parallel to the long axis, forming beams (n = 20) with a cross-sectional area of approximately 0.8 mm 2. The specimens were tested in a Universal Testing Machine at 0.5 mm/min. The cross-sectional area was measured and the results (MPa) were analyzed by two-way ANOVA and Tukey Test (p < 0.05). Overall, the groups treated with CSE exhibited the highest TBS for all surface treatments. Dentin surfaces prepared with carbide bur at low speed reduced TBS in the CSE group; however, OUB was not affected by surface treatments. The effect of surface abrasive methods on TBS was material-dependent.