Abstract
Purpose: This study evaluated the influence of the silane heat treatment on the microtensile bond strength between a feldspathic ceramic and a resin cement after aging. Methods andmaterials: Twenty feldspathic ceramic blocks (Vita Mark II) with dimensions 12mm× 7mm× 5mm were duplicated in composite resin (W3D Master), and divided into 4 groups (n=5), according to the surface treatment: HS – 10% hydrofluoric acid (HFA) + silane; HST – 10% HFA+silane+heat treatment; HS/Tc – HS+10,000 thermal cycles; HST/Tc – HST+10,000 thermal cycles. The heat treatment of the silane was performed in a furnace at 100 ◦C for 2min. The resin cement RelyX ARC was mixed and applied on the ceramic blocks to the cementation. The set ceramic/cement/composite was embeddedand cut using a cuttingmachine, resulting in 18 samples (8mm× 1mm× 1mm) per block. The samples were subjected to the microtensile bond strength test using a universal testing machine (EMIC). Results: The results were evaluated using two-way ANOVA (a=0.05). The condition of no aging, had no statistical difference between the HS (25.07± 7.65) and HST (23.85± 7.16). However, in the aged condition, the group with silane heat treatment HST/Tc (22:41± 6.69) showed the highest bond strength compared to the HS/Tc (15:17± 4.69). Conclusion:The study concluded that the silane heat treatment was effective in maintaining the bond strength after aging.
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