EAS Publisher | Comparative Evaluation of Push-Out Bond Strength and Bond Failure Mode of Ortho MTA and ProRoot MTA

Comparative Evaluation of Push-Out Bond Strength and Bond Failure Mode of Ortho MTA and ProRoot MTA

DOI : https://doi.org/10.36349/easjdom.2021.v03i05.002

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The aim of this study was to compare the push-out bond strength (PBS) and bone failure mode of Ortho mineral trioxide aggregate (MTA) and ProRoot MTA in root dentin. Forty extracted single-rooted human canine teeth were selected in this experimental study and the canal space of each dentin slice was enlarged with Gates Glidden burs to achieve a diameter of 1.3 mm. Midroot dentine was horizontally sectioned into 2-mm-thick slices. The samples were randomly divided into two groups (n=20) with a thin layer placement of Ortho MTA and ProRoot MTA, and then incubated at 37°C, 100% humidity for 24 hours (h). PBS (Mpa) and the bond failure mode were evaluated after 10 minutes (min) and 4 h using a universal testing machine and a stereomicroscope (×10), respectively. Data were analyzed using the Kruskal-Wallis test and K2 test. The mean PBS values of Ortho MTA were less than ProRoot MTA. The main failure mode after 10 min was cohesive type for both materials, while the dominant failure mode after 4 h was adhesive type in Ortho MTA and cohesive type in ProRoot MTA. Failure bond mode was irrelevant to the kind of tested materials and time assessments.

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