• Tamer Taşdemir, Kürşat Er, Davut Çelik, Erhan Tahan, Ahmet Serper, Kadir Tolga Ceyhanli, and Cemal Yeşilyurt.
• Department of Endodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey.
• Med Princ Pract. 2014 Jan 1; 23 (4): 373-6.

ObjectiveTo assess the influence of various canal-drying techniques on the push-out bond strength between radicular dentine and both MTA Fillapex and iRoot SP sealers.Materials And MethodsEighty extracted single-root teeth were instrumented with ProTaper Universal rotary instruments to a size F4. The teeth were randomly assigned to 1 of 4 groups as follows: group 1, excess fluid in the canals was removed using a Luer vacuum adapter; group 2, the canals were dried with a single paper point; group 3, the canals were dried with 3-5 paper points, and group 4, the canals were rinsed with 95% ethanol and then dried with 3-5 paper points. In each group, the specimens were subgrouped according to root canal sealer into either subgroup A (MTA Fillapex) or subgroup B (iRoot SP sealer). Horizontal sections (thickness 1 ± 0.1 mm) were obtained from each specimen and a push-out test was performed using a universal testing machine at a crosshead speed of 1 mm/min on root slices. Statistical analysis was done using the Kruskal-Wallis test and Dunn's test for pair-wise comparisons. p < 0.05 was considered statistically significant.ResultsCanals dried with only 1 paper point and obturated with the iRoot SP sealer (subgroup 2B) showed significantly higher bond strengths to the root canal wall compared to all other subgroups (p < 0.05), except for subgroup 1B (p > 0.05).ConclusionsThe canal-drying technique influenced the adhesive bond strength between calcium silicate-based root canal sealers and the root canal wall.© 2014 S. Karger AG, Basel.

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