Hands OnCoating to prevent denture stomatitis
Section snippets
Background
Denture wearers often suffer denture stomatitis (DS), which is caused by multiple factors, including mucosal trauma, aged denture material, residual monomer allergy, and, most commonly, the combination of poor oral hygiene and Candida albicans infection. C albicans biofilm is highly resistant to antifungal agents. In addition, continued wearing of the infected denture maintains contact between the infectious agent and the mucosa. As a result, research has been focused on developing ways to
Methods
Two commercial composite surface sealants (Biscover and Surface Coat) were compared for their ability to reduce C albicans biofilm formation on denture resin that was prepared to simulate rough or smooth denture surfaces. In addition, the surface integrity of the denture resin after disinfection with 1% sodium hypochlorite solution was tested. Four surface-treatment groups were formed: one had smooth surfaces with 0.3 μm average surface roughness (Ra), one had rough surfaces (3 μm Ra), one had
Results
CV staining indicated no significant differences in absorbance values between the Biscover specimens and those with uncoated 0.3-μm Ra surfaces. No differences between the Surface Coat surfaces and the uncoated 3-μm Ra surfaces. A comparison of the two sets of groups indicated that the uncoated 0.3-μm Ra surfaces and the Biscover surfaces had significantly lower absorbance values than the uncoated 3-μm or Surface Coat surfaces.
A comparison of the immersed and cycled samples with the
Discussion
CV analysis in the coated groups of denture resin showed that factors besides surface roughness are strongly linked to the chemical nature of the biomaterial surface. The effectiveness of Biscover was similar to that seen with smooth surfaces. The Surface Coat produced surface characteristics similar to those seen with rough surfaces. These findings held regardless of whether the samples were immersed in sodium hypochlorite or distilled water and whether it was for 30 or 90 cycles. Thus
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Silva MJ, de Oliveira DG, Marcillo OO, et al: Effect of denture-coating composite on Candida albicans biofilm and surface degradation after disinfection protocol. Int Dent J 66:86-92, 2016
Reprints available from DG de Oliveira, Dept of Prosthodontics, Bauru School of Dentistry, Univ of São Paulo, Alameda Dr. Otávio Pinheiro Brizola, 9-75, 17012-901 Bauru, São Paulo, Brazil; e-mail: [email protected]