Effect of different cleansers on the surface of removable partial denture.
Removable partial dentures (RPD) demand specific hygienic cleaning and the combination of brushing with immersion in chemical solutions has been the most recommended method for control of biofilm. However, the effect of the cleansers on metallic components has not been widely investigated. This study evaluated the effect of different cleansers on the surface of RPD. Five disc specimens (12 mm x 3 mm metallic disc centered in a 38 x 18 x 4 mm mould filled with resin) were obtained for each experimental situation: 6 solutions [Periogard (PE), Cepacol (CE), Corega Tabs (CT), Medical Interporous (MI), Polident (PO), 0.05% sodium hypochlorite (NaOCl), and distilled water (DW) control] and 2 Co-Cr alloys [DeguDent (DD) and VeraPDI (VPDI)] were used for each experimental situation. A 180-day immersion was simulated and the measurements of roughness (Ra, µm) of metal and resin were analyzed using 2-way ANOVA and Tukey's test. The surface changes and tarnishes were examined with a scanning electronic microscopy (SEM). In addition, energy dispersive x-ray spectrometry (EDS) analysis was carried out at representative areas. Visually, NaOCl and MI specimens presented surface tarnishes. The roughness of materials was not affected by the solutions (p>0.05). SEM images showed that NaOCl and MI provided surface changes. EDS analysis revealed the presence of oxygen for specimens in contact with both MI and NaOCl solutions, which might suggest that the two solutions promoted the oxidation of the surfaces, thus leading to spot corrosion. Within the limitations of this study, it may be concluded that the NaOCl and MI may not be suitable for cleaning of RPD.
Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Ribeirão Preto, SP, Brazil.
Daniela Nair Borges
DN
Felipucci
Letícia Resende
LR
Davi
Helena Freitas Oliveira
HF
Paranhos
Osvaldo Luiz
OL
Bezzon
Rodrigo Ferreira
RF
Silva
Valéria Oliveira
VO
Pagnano
D000180:Acrylic Resins / Q000737:chemistry*; D001881:Borates / Q000737:chemistry; D002594:Cetylpyridinium / Q000737:chemistry; D002710:Chlorhexidine / Q000031:analogs & derivatives / Q000737:chemistry; D002858:Chromium Alloys / Q000737:chemistry*; D019343:Citric Acid / Q000737:chemistry; D003343:Corrosion; D003764:Dental Materials / Q000737:chemistry*; D003820:Denture Cleansers / Q000737:chemistry*; D003832:Denture, Partial, Removable; D006801:Humans; D007101:Immersion; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010084:Oxidation-Reduction; D010100:Oxygen / Q000032:analysis; D012973:Sodium Hypochlorite / Q000737:chemistry; D013052:Spectrometry, X-Ray Emission; D013431:Sulfates / Q000737:chemistry; D013499:Surface Properties; D013997:Time Factors
D000180:Acrylic Resins; D001881:Borates; D002858:Chromium Alloys; D003764:Dental Materials; D003820:Denture Cleansers; D013431:Sulfates; C540407:corega tabs; D019343:Citric Acid; C102654:Polident; D002594:Cetylpyridinium; D012973:Sodium Hypochlorite; C010882:chlorhexidine gluconate; D002710:Chlorhexidine; D010100:Oxygen; C027707:sodium perborate