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Background  To evaluate the effect of surface treatments on the push-out bond strength of Biodentine (BD) and white mineral trioxide aggregate (WMTA) to fiber posts.    Methods  Two brands of fiber posts were used: Reblida post; RP and RelyX post; RX. Each type of post (n = 80/group) was divided into four groups (n = 20/group) and exposed to surface treatment as follows: Control (no treatment), sandblasting (SB), hydrofluoric acid (HF), and TiF 4  4 wt/v%. Each group was further subdivided into two subgroups (n = 10/subgroup) based on the type of CSCs used as follows:  Subgroup A:  BD and  Subgroup B:  WMTA. Push-out bond strength of BD and WMTA to glass fiber posts was assessed. Data were statistically analyzed using three-way ANOVA and Tukey’s test. A Weibull analysis was performed on the push-out bond strength data.    Results  BD showed higher bond strength than WMTA ( P  < 0.001). The push-out bond strength for posts treated with TiF4 4 wt/v% showed greater bond strength than the other surface treatments ( P  < 0.05). The BD/RP-TiF 4  4 wt/v% showed the greater characteristic bond strength (σ 0 ) (15.93) compared with the other groups. Surface treatments modified the surface topography of glass fiber posts.    Conclusions  The BD/RP-TiF 4  4 wt/v% showed greater bond strength compared with the other groups. The TiF 4  4 wt/v% surface treatment enhanced the bond strength of BD and WMTA to glass fiber posts than the other treatments. Surface treatment of fiber post with TiF 4  4 wt/v% could be used to improve the bond strength with calcium silicate-based cements.

Effect of surface treatments on push-out bond strength of calcium silicate-based cements to fiber posts