This study aimed to compare the effect of four irrigation solutions for post space cleaning on the bond strength between glass fiber post and root dentine. Forty bovine roots were root-filled and randomly divided into four groups (n=10), according to the irrigation solution: CG (Control Group): saline solution; SH (Sodium Hypochlorite Group); CLX (Chlorhexidine group) and EDTA (ethylenediaminetetraacetic acid group). Specimens were submitted to mechanical aging and push-out test. Statistical analysis (ANOVA two-way and Tukey test; p<0.05) was performed. A stereomicroscope was used for failure mode classification. EDTA showed higher bond strength values, differing statistically from SH and CG (p<0.05). Adhesive failure between dentin and resinous cement was predominant, followed by mixed failures. SEM images showed pronounced smear layer removal in the EDTA group. 17 % EDTA was better than other solutions for cleaning of post space when using glass fiber posts.
KEY WORDS: dentin-bonding agents, EDTA, materials testing, glass fiber post, smear layer.
How to cite this article
MACÁRIO, T. R. L.; CARVALHO, R. F.; DOMINGUES, P. B. A.; MAIA, B. G. O.; MARINHO, C. C.; BARCELLOS, A. S. P. & JUNQUEIRA, R. B. Evaluation of the cleaning protocol of post space on bond strength of glass fiber posts. Int. J. Odontostomat., 15(2):427-433, 2021.