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Does MTA and Calcium Hydroxide Additives Effect on the Bond Strength of AH Plus Sealer?

Emre Bayram, Huda Melike Bayram, Tugrul Aslan and Yakup Ustün

The aim of the this study was to evaluate the bond strength of the canal sealers formed experimentally by adding different levels of MTA and Ca(OH)2 into AH Plus, and comparing with unaltered AH Plus, Total Fill and MTA Fillapex. 91 single-rooted human maxillary central teeth were prepared, with the following sealer type evaluated for bond strength (n=70): AH Plus; MTA Fillapex; TotalFill; and four experimental sealers (AH plus+ 5% Ca(OH)2 ; AH plus+ 5% MTA; AH plus+ 10% Ca(OH)2; AH plus + 10% MTA) (n=10). Three slices of 1 mm thickness were obtained from each root sample, and the bond strength of the test materials was measured using a push-out test. The data were analysed using one-way ANOVA and post hoc Tukey tests (p=0.05). The highest and lowest mean push-out values were obtained for AH plus+10% MTA and MTA fillapex groups, respectively (p<0.05). No statistically significant difference was found between AH-plus and the experimental sealers (p>0.05). It was observed that adding 5% or 10% of Ca(OH)2 or MTA to AH-plus had no negative effect on the bond strength of AH plus.