EVALUATE AND COMPARE THE EFFECT OF DENTURE CLEANSERS ON TENSILE BOND STRENGTH AND HARDNESS OF SILICONE BASED RESILIENT LINERS - AN IN VITRO STUDY
Dr. Prasad K. B* and Dr. Kurien Varghese
ABSTRACT
Objectives: The objectives of this study is to determine the effect of two popular denture cleansers (Clinsodent® & Secure®) on tensile bond strength and hardness of two commonly used silicone based resilient liner (Ufi gel PTM& GC reline softTM), during the period of 6 months storage duration. Methodology: For tensile bond strength testing 120 rectangular specimens of both Ufi gel PTM and GC reline softTM were fabricated with standardized brass flask. Two acrylic blocks were joint with the respective silicone liner material of thickness 3mm x 10mmx 10mm. For hardness 120 cylindrical specimens (20mm x 12mm) of both liner were fabricated from standardized brass flask. All the specimens were stored in water (control), Clinsodent, Secure denture cleansers for a period of 24 hours and 180 days. Evaluation of tensile bond strength done by Univeral testing machine and hardness by shore A durometer after first day and 180 days. All the data were statistically analyzed using paired student t test, one way analysis of variance (ANOVA), Post Hoc test. Results: There is a significant reduction in tensile bond strength and increase in shore A hardness of Ufi gel PTM and GC reline Soft specimen stored in Secure denture cleanser for a period of 180 days compared to first day. There was insignificant effect of clinsodent and water on tensile bond strength and hardness of the liner. Conclusion: Soft liners stored in cleansing solutions and water did not show much significant variation in mechanical property. Hence it is advisable to use cleansers for better anti microbial property. Ufi gel PTM was proved to be a better material than GC reline softTM liner with minimal variation.
Keywords: Silicone liner, denture cleansers, tensile bond strength, hardness.
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