A comparative in vitro study of two denture cleaning techniques as an effective strategy for Inhibiting Candida albicans Biofilms on denture surfaces and reducing inflammation

Gordon Ramage*, Adriana Zalewska, Donald A. Cameron, Leighann Sherry, Colin Murray, Mary Beth Finnegan, Zvi G. Loewy, Daryll C. Jagger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Purpose:Candida albicans is the predominant oral yeast associated with denture-induced stomatitis, and with an increasing population of denture wearers its incidence is increasing. Maintaining good oral and denture hygiene, through chemical and/or mechanical intervention, is essential to reducing this disease. The aim of this study, using a robust adherent C. albicans cell model system, was to evaluate and compare the efficacy of a novel denture cleanser to the efficacy of a commonly used dentifrice coupled with brushing. Materials and Methods: Four C. albicans strains isolated from individuals diagnosed as having denture-induced stomatitis, were adhered to denture acrylic resin sections (1 cm2 by 1 mm thickness) and after 4 hours of growth, challenged daily sequentially for 4 days with a denture cleanser (Polident) or intermittently with denture cleanser (day 1), then dentifrice (Colgate Cavity Protection Toothpaste) and brushing (days 2 and 3) and denture cleanser (day 4). Colony forming units were evaluated for each treatment, as were the levels of regrowth. Scanning electron microscopy (SEM) was also performed. Microbial susceptibility testing and time-kill studies were performed on biofilms. A coculture model was also used to assess interleukin-8 (IL-8) production from treated biofilms. Results: It was shown that sequential treatment with the denture cleanser killed and inhibited regrowth each day. Intermittent treatment showed that viable C. albicans biofilms were only retained rather than being dispersed, which could be visualized by SEM. Time-kill studies demonstrated that the novel denture cleanser was highly active and killed quickly, unlike the dentifrice. IL-8 was expressed in greater levels in 24-hour biofilms than in 4-hour biofilms, but treatment with denture cleanser reduced IL-8 output. Conclusions: The data indicate that maintaining good oral health for denture wearers requires daily use of a denture cleanser rather than an alternating regimen. The inability of the denture cleanser to sterilize during intermittent treatments demonstrates the difficulty in controlling established biofilm. Moreover, the presence of mature biofilm may result in high levels of inflammation, but this can be controlled through denture cleansing.
Original languageEnglish
Pages (from-to)516-522
Number of pages7
JournalJournal of Prosthodontics
Volume21
Issue number7
Early online date1 Jun 2012
DOIs
Publication statusPublished - Oct 2012
Externally publishedYes

Keywords

  • Biofilm
  • Candida
  • Dentifrice
  • Denture cleanser

ASJC Scopus subject areas

  • General Dentistry

Fingerprint

Dive into the research topics of 'A comparative in vitro study of two denture cleaning techniques as an effective strategy for Inhibiting Candida albicans Biofilms on denture surfaces and reducing inflammation'. Together they form a unique fingerprint.

Cite this