Effect of Bleaching and Ca(OH)2 Dressing on the Bond Strength of Fiberglass Posts to Root Dentine.

摘要: Objective The purpose of this study was to evaluate the effect intracoronary bleaching and calcium hydroxide (Ca(OH)2) dressing use, on bond strength (BS) fiberglass posts root dentine. Materials Methods After canal filling 40 bovine incisors, a 2-mm thick cervical plug fabricated 2 mm below cementum–enamel junction. Seven days later, teeth were randomly distributed into four groups (n = 10), as follows: G1 no bleaching, followed by immediate post cementation; G2 G3 with Ca(OH)2 for 7 days, G4 dressing, cementation after 7 days. roots transversally cut 1-mm slices perform push-out test (0.5 mm/min). Failure modes assessed under scanning electron microscopy. Statistical Analysis analysis variance (two-way ANOVA) performed, supplementary Tukey multiple comparison (a 5%). Results No significant difference BS observed among groups. Considering different thirds, had higher values third in apical one (p Conclusions dentine not affected use dressing.