Effect of Ultrasonic Activation of a Bioceramic Sealer on Its Radicular Push out Bond Strength- an in Vitro Study
Journal Title: International Journal of Research and Review - Year 2018, Vol 5, Issue 10
Abstract
Background: Adherence of root canal sealer to root dentin is an important requirement as there is a direct relationship between the bond strength and sealing ability of a sealer. Ultrasonics has been widely used for irrigation and instrumentation purposes but its use for sealer activation has not been explored sufficiently. Aim: To evaluate the effect of ultrasonic activation of bioceramic root canal sealer on its push-out bond strength to root canal dentine. Methodology: The root canals of 80 roots of mandibular premolars were prepared with Ni-Ti rotary instruments under irrigation with 5% NaOCl and 17% EDTA. Samples were divided into two groups depending upon the mode of activation of sealer: Ultrasonic Activation (UA) and no activation (NA). Endosequence BC sealer was placed into the canals. In UA group, ultrasonic activation of the sealer was performed for one minute and canals were obturated. In group NA, no activation was performed and samples were obturated. After two weeks, 1±0.1mm thick slice of coronal and apical radicular third of specimens was subjected to push-out testing using Universal testing machine. Subsequently the slices were observed under stereomicroscope for failure mode analysis. Results: Data obtained was statistically analysed using independent t- test. Group UA demonstrated better bond strength than group NA both at coronal as well as apical levels. The mechanism of cavitation and acoustic streaming might be responsible for better adaptation to root dentin and subsequently better bond strength. Conclusion: Ultrasonic activation of bioceramic sealer results in its increased adherence to root dentin.
Authors and Affiliations
Sachin Chadgal
Keywords
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