Merck
CN
  • Effect of antimicrobial agents incorporated into resilient denture relines on the Candida albicans biofilm.

Effect of antimicrobial agents incorporated into resilient denture relines on the Candida albicans biofilm.

Oral diseases (2013-11-14)
M G Bueno, V M Urban, G S Barbério, W J da Silva, V C Porto, LdeR Pinto, K H Neppelenbroek
ABSTRACT

The antimicrobial action of five drugs incorporated in temporary denture relines on the fungal biofilm was evaluated. 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. 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. The antimicrobials incorporated in the resilient materials inhibited fungal growth during 14 days, with lower MICs for nystatin and chlorhexidine.

MATERIALS
Product Number
Brand
Product Description

Supelco
Ketoconazole, Pharmaceutical Secondary Standard; Certified Reference Material
Itraconazole, European Pharmacopoeia (EP) Reference Standard
Ketoconazole, European Pharmacopoeia (EP) Reference Standard
USP
Ketoconazole, United States Pharmacopeia (USP) Reference Standard
Sigma-Aldrich
Chlorhexidine diacetate salt hydrate, bis(biguanide) antimicrobial
Sigma-Aldrich
Propidium iodide solution
Sigma-Aldrich
Ketoconazole, 99.0-101.0% (EP, titration)
USP
Miconazole, United States Pharmacopeia (USP) Reference Standard
Sigma-Aldrich
Ketoconazole
Miconazole, European Pharmacopoeia (EP) Reference Standard
USP
Chlorhexidine acetate, United States Pharmacopeia (USP) Reference Standard
Supelco
Chlorhexidine acetate, Pharmaceutical Secondary Standard; Certified Reference Material
Chlorhexidine diacetate, European Pharmacopoeia (EP) Reference Standard
Sigma-Aldrich
Itraconazole, ≥98% (HPLC)
Sigma-Aldrich
Propidium iodide, ≥94.0% (HPLC)
Sigma-Aldrich
Propidium iodide, ≥94% (HPLC)