Effect of dentinal surface preparation on bond strength of self-etching adhesive systems.
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 degrees 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.
Rocha
Patrícia Itocazo
PI
Department of Restorative Dentistry, School of Dentistry of Piracicaba, State University of Campinas.
Borges
Alessandra Bühler
AB
Rodrigues
José Roberto
JR
Arrais
César Augusto Galvão
CA
Giannini
Marcelo
M
D000134:Acid Etching, Dental; D000269:Adhesives / Q000737:chemistry*; D001840:Dental Bonding; D003804:Dentin / Q000187:drug effects; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry*; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength
D000269:Adhesives; C438313:Clearfil SE Bond; D017220:Dentin-Bonding Agents; D008689:Methacrylates; C446260:One-Up-Bond F; D019279:Resin Cements