Influence of Different Irrigation Solutions on the Push-Out Bond Strength of Fiber Posts to Root Dentin and Root Canal Dentin Microhardness: Methodological Study

Objective: This study aimed to compare the effect of sodium hypochlorite (NaOCl), chlorhexidine (CHX), ethylene daimine tetra acetic acid (EDTA) and etidronic (HEBP) solutions their combinations on a push-out bond strength fiber posts root canal dentin microhardness. Material Methods: Sixty human maxillary central incisors were sectioned below cementoenamel junction, roots endodontically treated divided into 6 groups (n=10) according final irrigation protocol: (1) Distilled water, (2) CHX, (3) HEBP-NaOCl combination, (4) HEBP, (5) 2.5 % NaOCl, (6) 17% EDTA. The then cemented with self-etching resin cement. Bonded specimens cut (1-mm-thick), first slice coronal 3rd was used for microhardness analysis, other slices test. data statistically analyzed by using Shapiro-Wilk, Oneway ANOVA, Games-Howell Results: lowest observed in NaOCl (p<0.05). EDTA resulted less reduction as compared showed significantly higher mean cervical thirds than Conclusion: With regard post dentin, increased groups. have lower dentin. Compared increases does not make significant difference strength. Therefore, it is recommended use HEBP alone.