Guanidine derivative inhibits C. albicans biofilm growth on denture liner without promote loss of materials’ resistance

To reduce the burden of denture stomatitis and oral candidiasis, an aqueous solution containing polyhexamethylene guanidine hydrochloride (PHMGH) was investigated as an antifungal disinfectant against the leading cause of these oral conditions, Candida albicans. The solutions formulated with concentrations ranging from 0.125 to 0.50 wt% enabled increasing disinfection at the initial 5min-contact with 72h-mature candida biofilms formed on denture liner specimens. After 10 min-contact, the solution at lower concentration has reached total fungal elimination. The results also indicated that the denture liners preserved their mechanical property after the maximum contact time with the solution at the highest tested concentration. The PHMGH aqueous solutions at 0.125 wt% could be applied to promote interim denture liner disinfection without promoting the loss of materials’ mechanical property. [Display omitted] •PHMGH solution was tested for the first time against oral Candida albicans biofilm.•PHMGH solution was effective against Candida albicans-mature biofilm.•PHMGH solution did not affect the mechanical property of the soft liner.