RESUMO
STATEMENT OF PROBLEM: Antifungals are used to treat Candida infections. However, because of increased antifungal resistance and the length of antifungal therapy, Candida spp. infections can be prevented using the prosthesis hygiene method. Therefore, establishing efficient, safe, and low-cost hygiene protocols for complete denture wearers is necessary. PURPOSE: The purpose of this clinical trial was to compare 10% Ricinus communis (RC10%) and 0.5% chloramine-T (CT0.5%) with negative (water) and positive (0.25% sodium hypochlorite [SH0.25%]) controls to establish a protocol to treat denture stomatitis (DS), remove denture biofilm, reduce overall microbiota, and decrease Candida spp. on the palate and denture bases. MATERIAL AND METHODS: This randomized, double blind, controlled clinical trial allocated 60 DS-positive participants in parallel groups: RC10%, CT0.5%, negative control, and SH0.25%. All participants brushed their palate and dentures and applied 1 of the solutions only to the denture. The following outcomes were assessed at baseline and after 7 and 37 days: Candida spp. counts, frequency of species by presumptive identification, DS severity, and photographic quantification of biofilm. The Kruskal-Wallis and Friedman tests with stepwise step-down post hoc test compared the anticandidal effect and the DS score (between groups and time). ANOVA and the Tukey post hoc test were used for biofilm removal comparison (α=.05). RESULTS: Microbial counts were solution- and time-dependent for dentures, with C. albicans, C. tropicalis, and C. glabrata being the most prevalent species. RC10% presented similar results to baseline and control after 7 and 37 days. CT0.5% reduced the CFU/mL compared with the baseline. SH0.25% was the most effective. DS reduced in all groups, independent of the solution. SH0.25% reduced biofilm the most, followed by RC10%. CT0.5% was similar to the control. CONCLUSIONS: SH0.25% demonstrated potential for Candida spp. control in denture wearers with DS. The other protocols showed intermediate activity and might be more suitable for longer immersion periods.