A Comparative Study to Evaluate the Effect of Ultrasonic Agitation on Push - Out Bond Strength of Three Root-End Filling Materials: An In Vitro Study
Keywords:Retrograde-filling, bioceramic, biodentine, MTA, ultrasonic agitation.
Aim: To evaluate the effect of ultrasonic agitation for retrograde biodceramic root repair, MTA and biodentine
filling materials on push-out bond strength to dentine walls.
Materials and Methods: Ninety extracted human teeth with single straight roots were selected randomly.
After disinfection and cleaning, the coronal portions were sectioned to standardize the root canal length at
15mm. following root canal shaping, obturation and apical roots resection, retrograde cavities were prepared.
Teeth were categorized depending on the filling material used into three groups, 30 teeth each. Group A
filled with bioceramic root repair material, B with MTA and C with Biodentine material. These groups were
divided in to three subgroup (n=10). Subgroups:A1, B1, and C1 cavities were filled with the aid of condenser.
A2, B2, and C2 with ultrasonic agitation of material for 30 seconds. A3, B3, and C3 with ultrasonic agitation
of material for 60 seconds. Push-out bond strength test was done for the samples to specify bond strengths at
the cement/dentin interfaces. The specimens were examined using a stereomicroscope to estimate the mode
of failure. Data were statistically analyzed using two-way ANOVA and Bonferonni test.
Results: Ultrasonic agitations increase the bond strength for all cements. BiodentineTM, PD™ MTAWhite
and TotalFill®BC RRM™ were significantly increased (P<0.05). While, increasing the time of ultrasonic
was statically non-significant among groups.
Conclusions: Ultrasonic agitation of root-ending filling materials showed increase in push-out bound
strength to dentine walls.
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