2018-11-202018-11-202014VALDIVIA, Andréa Dolores Correia Miranda et al. Effect of surface treatment of fiberglass posts on bond strength to root dentin. Brazilian Dental Journal, Ribeirão Preto, v. 25, n. 4, p. 314-320, 2014.0103-6440e- 1806-4760http://repositorio.bc.ufg.br/handle/ri/16455his study evaluated the influence of the surface treatments of fiberglass posts on bond strength to root dentin using push-out test. Forty bovine incisor roots were endodontically treated. The surface of the fiberglass posts (Exacto #2, Angelus) were treated using 4 different protocols (n=10): Control - 70% ethanol for 1 min; 37% phosphoric acid for 1 min; 10% hydrofluoric acid for 1 min; and 24% hydrogen peroxide for 1 min. After a silane coupling agent was applied for 1 min and all posts were cemented using self-adhesive resin cement (RelyX Unicem, 3M-ESPE). The roots were sectioned and two 1-mm-thick slices were obtained from each third: cervical, middle and apical. The specimens were subjected to the push-out test with a crosshead speed of 0.5 mm/min. Data were analyzed by repeated measures ANOVA followed by Tukey's HSD tests (α=0.05). The surface treatment (p<0.001) and root third region (p=0.007) factors were significant. The retention to root canal was affected by surface treatment type. The post surface treatment with 24% hydrogen peroxide for 1 min yielded significantly higher bond strength when the fiberglass posts were cemented with RelyX Unicem.engAcesso AbertoSurface treatmentsFiberglass postsPush-out testSelf-adhesive resin cementArtigo10.1590/0103-6440201300143