Objectives: An ideal endodontic sealer should bond to both dentin and root-filling material. This study aimed to assess the push-out bond strength (PBS) of mineral trioxide aggregate (MTA)-Fillapex, Endoseal MTA, AH26, and Sure-Seal Root to root dentin after root canal drying with different techniques.
Materials and methods: This in vitro study was conducted on 160 extracted mandibular premolars. After root canal preparation, the teeth were randomly divided into four groups (n = 40) of drying with ethanol, paper point, air vacuum, and control (wet canal). Each group was divided into four subgroups (n = 10) for use of AH26, Sure-Seal Root, MTA-Fillapex, and Endoseal MTA sealers. The mean PBS was measured by a universal testing machine. The mode of failure was determined under a stereomicroscope. Data were analyzed by the Kruskal-Wallis and Games-Howell tests.
Results: The maximum mean PBS was equally recorded in ethanol and paper point groups, and was significantly higher than that of control and air vacuum groups (p < .001). In the use of AH26 sealer, the mean PBS in drying with ethanol was significantly higher than all other methods (p < .05). The mean PBS in drying with a paper point was also significantly higher compared with control and air vacuum methods (p < .05). In the use of Sure-Seal, the mean PBS in drying with a paper point was significantly higher than other methods (p < .05). The mean PBS in drying with ethanol was significantly higher than that in control and air vacuum methods (p < .001). In the use of MTA-Fillapex and Endoseal-MTA, the technique of drying had no significant effect on PBS. Adhesive and mixed failures were the most common in all drying groups.
Conclusions: Drying with ethanol and paper point enhanced the PBS of sealers to root dentin.
Keywords: epoxy resin-based root canal sealer; ethanol; mineral trioxide aggregate; tooth root.
© 2023 The Authors. Clinical and Experimental Dental Research published by John Wiley & Sons Ltd.