Abstract
Candida albicans-associated denture stomatitis is the most common type of denture stomatitis seen in denture wearers. This study evaluates and compares the antifungal action of fluconazole, chlorhexidine gluconate and tea tree oil on heat-polymerised denture base resin, which has been previously contaminated with C.albicans grown in BHI broth. Seventy-five specimens were immersed in BHI broth previously inoculated with C.albicans and stored for 3h at 37°C. They were divided into five groups (n=15): G1: 2% chlorhexidine solution; G2: 100% pure pharmaceutical grade tea tree oil; G3: 65μg/ml fluconazole solution; C1: specimens not disinfected; C2: specimens not contaminated with Candida. Each specimen was then transferred to individual tubes containing BHI broth and incubated for 24h. Culture media turbidity was evaluated for absorbance over a period of 14days using a microplate reader. It was observed that the lower the absorbance, the stronger the antimicrobial action. Statistical analysis was performed (two-way anova and Bonferroni test, p<0.001). Chlorhexidine and tea tree oil inhibited Candida up to the 14th day, whereas antifungal effect of fluconazole was not significant after the 7th day. Tea tree oil and chlorhexidine gluconate are more effective than fluconazole in inhibiting C.albicans growth on heat-polymerised acrylic resin.
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