Resumo

LIMA, Darlon Martins  e  CANDIDO, Maria Salete Machado. Effect of dentin on the shear bond strength of different adhesive systems. RGO, Rev. gaúch. odontol. (Online) [online]. 2012, vol.60, n.2, pp. 149-161. ISSN 1981-8637.

Objective This study assessed the shear bond strength of total-etch and self-etch adhesive systems to sound and caries-affected human dentin. Methods The total-etch adhesive systems investigated were Scotchbond Multi Purpose Plus (3M ESPE, St. Paul, MN, USA) and Single Bond (3M ESPE, St. Paul, MN, USA), and the self-etch adhesive systems were Clearfill SE Bond (Kuraray, Osaka, Japan) and Adper Prompt L-Pop (3M ESPE, St. Paul, MN, USA). Eighty human teeth were used, 40 sound and 40 caries-affected (n=10). They were cut with a diamond disc to expose the dentinal surface and the adhesion area was standardized to 4 millimeters. Caries detector was used on the caries-affected4 teeth and the affected tissue was removed. The bond shear strength of different adhesives was tested on sound dentin (control group) and caries-affected dentin (experimental group). Z-100 composite resin cylinders were fabricated using a two-piece mold, and the specimens were stored in distilled water at 37°C for 24 hours, and submitted to the shear strength bond test using a crosshead speed of 0.5 mm/min. Results The data were treated by analysis of variance and Tukey test and the significance level was set at 5%. Caries-affected dentin had a significant negative impact on the shear bond strength of total-etch adhesive systems. Conclusion Shear bond strength depends on dentin status and type of adhesive system used.

Palavras-chave : Dentin.; Dentin adhesives.; Shear bond strength..