Effect of Acidic Environment on the Push-Out Bond Strength and Surface Morphology of Tricalcium Silicate Materials Park, Misun; Kim, Jaehwan; Choi, Namki; Kim, Seonmi;
The aim of this study was to evaluate the effect of a range of acidic pH values on the push-out bond strength and surface morphology of tricalcium silicate materials: Biodentine, Theracal and ProRoot MTA. The standardized lumens of root slices prepared from extracted single-root human teeth were filled with Biodentine, Theracal and ProRoot MTA according to manufacturer's instructions. The specimens were randomly divided into 4 groups (n = 20) for each material and then incubated for 4 days at ; 3 acidic groups (butyric acid buffered at pH 4.4, 5.4, 6.4) and 1 control group (phosphate buffered saline solution at pH 7.4). The push-out bond strengths were then measured by using a universal testing machine and the surface morphology of each experimental group was analyzed by a scanning electron microscope. Biodentine and Theracal showed higher push-out bond strength compared with ProRoot MTA after exposure to acidic pH values. A substantial change in the surface morphology of each material occurred after exposure to different pH values. In conclusion, the push-out bond strengths of Biodentine and Theracal are higher than the ProRoot MTA. Further the acidic environment weakens the push-out bond strength and microstructure of tricalcium silicate materials.
Acidic environment;Biodentine;Theracal;Mineral trioxide aggregate;Push-out bond strength;Scanning electron microscope;
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