Effect of Warm Air Drying on Micro-tensile Bond Strength of Resin Cement with Total-etch Adhesive System to Root Canal Dentin at Different Levels
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Abstract
The purpose of this study was to evaluate the effects of warm air drying on micro-tensile bond strength to root canal dentin of resin cement with total-etch adhesive system at different levels. Ten single-canal lower premolars were cut perpendicular to long axis at cementoenamel junction level and were prepared post space for FibreKleerTM fiber post set for 10 mm. Root canal surface was bonded with a total-etch adhesive (OptibondTM Solo Plus). Solvents were evaporated using air-drying with temperature of 20°C or 38°C. Fiber posts were cemented with resin cement Nx 3 NexusTM. After storage in water for 24 h at 37°C, the roots were sectioned transversely into 6 discs. Three discs were obtained from the coronal and apical levels. Specimens were trimmed to obtain hourglass shapes with a bond area of 1.0 ±0.1 mm2 for microtensile bond strength test. Data were analyzed by two-way ANOVA and Tukey’s test (p<0.05). Increasing the air-drying temperature did not significantly influence the bond strength of the resin cement with total-etch adhesive system. Coronal root region presented significantly higher bond strength than the apical region.
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