Effect of two intracanal medicaments on the sealing ability and push-out bond strength of Biodentine apical plug

Abstract

Introduction The purpose of this study was to evaluate the effect of calcium hydroxide (CH) and modified-triple antibiotic paste (mTAP) intracanal medicaments on the sealing ability and push-out bond strength of Biodentine (BD) apical plug. Materials and methods A total of 36 human maxillary central incisors were used in this study. Coronal access cavities were made, 3 mm slice of the root tip was resected and root canals were instrumented to simulate immature teeth. Teeth were randomly divided into three groups (n = 12) according to the type of medication used as follow: group 1, CH; group 2, mTAP; and group 3, control group with no medication. After removal of medicaments, BD apical plug was formed in 10 specimens of each group. The sealing ability was evaluated in eight experimental samples of each group while negative and positive samples (n = 4) were used to determine the efficacy of the fluid filtration device by mounting each specimen's root in the fluid transport device and measured by monitoring air bubble displacement in the capillary tube and volume of fluid movement was recorded in μl/min. Then the apical portion of each specimen (n = 8) in all groups was horizontally sectioned to produce 2 mm thick section. Each section was subjected to a compressive load to evaluate push-out bond strength. Data were statistically analyzed using one-way analysis of variance and Tukey test at 5% significance level then Pearson's correlation between sealing ability and push-out bond strength values was performed. Results Group 2 showed maximum leakage and the least leakage was recorded for control group with statistically significant difference (P 0.05). Conclusion The bond strength of BD apical plug to radicular dentine is less affected by medication with CH or mTAP while its sealing ability is significantly affected.