Influence of adhesive systems on microtensile bond strength of resin-based endodontic sealers to the root dentin

Abstract
Objective: The aim of this study was to determine the microtensile bond strength to root dentin of AH Plus™ and EndoREZ®with Clearfil Liner Bond 2V and Optibond Solo™ Plus adhesive systems.
Study Design: The coronal and middle thirds of six single rooted bovine teeth was split longitudinally in a mesio-distal direction. The two halves were joined with AH Plus or EndoREZ, with and without the use of Clearfil Liner Bond 2V and Optibond Solo™ Plus adhesive systems. Build-ups were vertically sectioned into quadrangular (≈1mmx1mm) compound bars and subjected to tensile tests at a constant crosshead speed (1 mm/min) until debonding.
 
Results: Optibond®Solo Plus™ in combination with AH Plus™ and EndoREZ®showed the highest mean micro-tensile bond strength values, in both coronal and middle thirds. The lowest results were seen in the groups where no
dentine adhesive was applied, and in those where the self-etching adhesive Clearfil Liner Bond 2Vwas used.
 
Conclusion: The microtensile bond strength to root dentin of AH Plus™ and EndoREZ may be increased with the use of a total-etch adhesive.
 

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