Peel Bond Strength and Antifungal Activity of Soft Denture Lining Materials Incorporated with Different Concentrations of Chlorhexidine: An In-Vitro Study

Abstract

Aim and background: The purpose of this study was to evaluate and compare the peel bond strength between the PMMA and soft denture lining material when soft liner is incorporated in 1% and 1.5% CHX at different time periods and its antifungal activity.

Materials and methods: A total of 54 samples were used in control group and experimental groups to test the peel bond strength and the modes of failure in UTM and antifungal activity by agar diffusion test.

Results: For peel bond strength ANOVA followed by Post Hoc Tukey test showed that control (14 days) was significantly higher (p<0.05) than all other except control (immediately). 1.5% CHX (immediately) showed significantly lower peel bond strength than all other groups (p<0.05). Modes of failure was analysed by Chi Square followed by Kruskal Wallis and Dunn-Bonferonni test, the values obtained shows group with 100% snap was significant from groups with 50% snap and 50% tear (p<0.05). Antifungal activity was analysed by ANOVA followed by Post Hoc Tukey test shows that control and experimental groups when compared were statistically significant (p=0) but comparison of experimental groups was not significant (p= 0.198).

Conclusion: Peel bond strength was more when CHX was not incorporated to the soft liner. Incorporation of 1.5% CHX reduced the peel bond strength when tested immediately. Addition of CHX resulted in antifungal activity. However, concentration of CHX added did not significantly affect antifungal activity.

Clinical significance: The study would enable us to find the efficacy of chlorhexidine concentration and its effect on peel bond strength between denture base material and soft reliners.