Effect of antimicrobial agents incorporated into resilient denture relines on the Candida albicans biofilm.
OBJECTIVE
The antimicrobial action of five drugs incorporated in temporary denture relines on the fungal biofilm was evaluated.


METHODS
A Candida albicans biofilm (SC5314) was formed on specimens (10 × 1 mm) of materials (Trusoft and Softone) modified or not (control) by the drugs (nystatin, miconazole, ketoconazole, itraconazole, and chlorhexidine diacetate). Cell viability was determined spectrophotometrically by the tetrazolium salt reduction assay (XTT) after 24 h, 48 h, and 7 and 14 days of incubation. The minimum inhibitory concentrations (MICs) were those which inhibited 90% or more of fungal growth. Fungal susceptibility was confirmed by confocal laser scanning microscopy analysis.


RESULTS
The MICs of drugs incorporated in the materials were 0.032, 0.256, 0.128, 0.256, and 0.064 g ml(-1) for nystatin, miconazole, ketoconazole, itraconazole, and chlorhexidine, respectively. Images from nystatin, chlorhexidine, and ketoconazole demonstrated no viable cells.


CONCLUSIONS
The antimicrobials incorporated in the resilient materials inhibited fungal growth during 14 days, with lower MICs for nystatin and chlorhexidine.
Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
M G
MG
Bueno
V M
VM
Urban
G S
GS
Barbério
W J
WJ
da Silva
V C
VC
Porto
LdeR
L
Pinto
K H
KH
Neppelenbroek
D000935:Antifungal Agents / Q000494:pharmacology*; D018441:Biofilms / Q000187:drug effects* / Q000254:growth & development; D002176:Candida albicans / Q000187:drug effects* / Q000254:growth & development; D002710:Chlorhexidine; D003822:Denture Liners / Q000382:microbiology*; D017964:Itraconazole / Q000494:pharmacology; D007654:Ketoconazole / Q000494:pharmacology; D008825:Miconazole / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D009761:Nystatin / Q000494:pharmacology
D000935:Antifungal Agents; D009761:Nystatin; D017964:Itraconazole; D008825:Miconazole; D002710:Chlorhexidine; D007654:Ketoconazole
Candida albicans; anti-infective agents; denture liners; denture stomatitis