Comparative Evaluation of the Effect of Two Cavity Disinfectants on the Microtensile Bond Strength at Resin-Dentine Interface: In Vitro study
European Journal of Molecular & Clinical Medicine,
2021, Volume 8, Issue 1, Pages 2159-2165
AbstractAim: The study aimed to evaluate and compare the effect of two cavity disinfectants [Chlorhexidine Digluconate 2% and Octenidine Dihydrochloride 0.1%] on the micro-tensile bond strength at the resin-dentine interface and to observe modes of failures under Scanning Electron Microscope. (SEM)
Methods: 21 freshly extracted human permanent molars were sectioned with a double-sided diamond disc to expose mid-coronal dentine and were randomly divided into 3 groups: A, B and C. 7 flat dentine surface were then treated with 37% phosphoric acid gel for 15 seconds. All restored teeth then were thermocycled and longitudinally sectioned and were subjected to micro-tensile testing, and fractured specimens were observed under SEM.
Results: There was a statistically significant difference between Group A (Control) and Group C (OCT) in microtensile bond strength. (p<0.05) The difference was no statistically significant between Group A (Control) and Group B (CHX), Group B (CHX) and Group C (OCT).
Conclusion: The use of Octenidine Dihydrochloride 0.1% and Chlorhexidine Digluconate 2% solutions after etching the dentine enhanced micro-tensile bond strength of composite restorations.
Keywords: Resin-dentine bond strength, MMPs, Cavity disinfectant, Micro-tensile testing
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