Abstract:The aim of this study was to evaluate the effect of calcium hydroxide (CH) and niobium pentoxide (NP) pretreatment on pH, dentin microhardness and sealing of Mineral Trioxide Aggregate (MTA; Angelus). The pH of CH, NP and CH–NP (3:1) was evaluated in neutral and acidic simulated tissue fluid over 28 days. The Vickers microhardness was measured in forty 4 mm coronal root slices filled with pretreatment materials stored in medium for 1, 7, 28 days. Forty 10 mm roots were packed with pretreatment materials, irrig… Show more
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