Temporary cement residues affect the bond strength and dentin penetration of self‐adhesive resin cement in fiberglass post cementation

This study evaluated the persistence of eugenol‐containing (PR, Provy) or eugenol‐free (RT, Relyx Temp, and TB, Temp Bond) temporary cement residues and its effects on push‐out bond strength and dentinal penetration of the self‐adhesive resin cement (Relyx U200). Eighty human roots were endodontically treated and post space prepared. Fourty specimens were distributed in four groups (n = 10): Control (CO), without any clinical procedure, PR, RT, and TB, where a metallic post was cemented with one of the temporary cements. After metallic post removal, hemi sections post space were submitted to SEM analysis. Another specimens were distributed in similar groups, but fiberglass post was cemented using Relyx U200 cement and submitted to push‐out bond strength and dentinal penetration cement analysis, in post space thirds. SEM analysis were evaluated by Kruskal–Wallis and Dunn tests, while bond strength and dentinal penetration were evaluated by ANOVA One‐Way and Tukey test (p