Evaluation of antibacterial activity against Candida albicans according to the dosage of various denture cleansers.

Purpose: The purpose of this study is to compare the antibacterial activity of currently purchasable denture cleansers against Candida albicans .
Materials and Methods: This study used tablet-type denture cleansers, Polident®, Coolingdent® and Fittydent®, along with liquid denture cleansers, Hexamedine®, Listerine® and Apple vinegar®. The antibacterial activities of denture cleansers were evaluated based on the number of C. albicans and concentrations of the denture cleansers.
Results: In the 0.5 × 10 ⁶ cfu/ml culture medium, the C. albicans ' death rate of Polident® was significantly lower than those of Fittydent®, Hexamedine®, Listerine®, and Apple vinegar®( P <.05). In the 0.5 × 10 ⁷ cfu/, the C. albicans ' death rates of Polident® and Coolingdent® were significantly lower than those of Fittydent®, Hexamedine®, Listerine® and Apple vinegar®( P <.05). The C. albicans ' death rates of Polident® and Coolingdent® were significantly decreased at 0.02 g and 0.01 g. The C. albicans ' death rate of Fittydent® was significantly decreased at 0.005 g ( P <.05). The C. albicans ' death rate of Hexamedine® was significantly decreased at 1/16 dilution. The C. albicans ' death rate of Listerine® was decreased at 1/8 dilution, and the antibacterial activity of Apple vinegar® was decreased at 1/4 dilution ( P <.05).
Conclusion: As the number of C. albicans increased, the antibacterial activities of the denture cleansers decrease. In the tablet-type denture cleanser, all denture cleansers showed 100% C. albicans ' death rate when used at a dose of 1 tablet. One denture cleanser showed the same antibacterial effect with only 1/3 of a tablet. In the liquid type denture cleanser, the level of dilution required was different for each denture cleanser.
(© 2021 The Korean Academy of Prosthodontics.)