[Side effects of chemical denture cleansers on denture metals].
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Corrosion↗
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Changes in surface roughness and colour stability of soft denture lining materials caused by denture cleansers.
Soft denture lining materials were immersed into solutions of denture cleansers for 8 h at room temperature, and immersed into distilled water for the remainder of the 24-h period at 37 degrees C. Surface roughness of the soft denture lining materials was measured by contact type surface roughness instrument. For the colour stability test, soft denture lining materials were immersed in the denture cleansers as described above for 180 days. Finally, the colour changes of each material were quantitatively measured by a photometrical instrument to obtain the colour differences between newly processed specimen and immersed specimens (P < 0.01). An autopolymerizing silicone material, Evatouch, exhibited severe changes in surface roughness by all denture cleanser, and the generic material GC Denture Relining showed the minimal changes. Severe colour changes were also observed with some liner and cleanser combinations (P < 0.01). Except for Evatouth, the four silicone soft liners were more stable in surface roughness and in colour change than the two acrylic soft liners. One autopolymerizing silicone (GC denture relining) and one heat curing silicone (Molloplast B) demonstrated the best stability.
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Effects of denture cleansers on direct soft denture lining materials.
The deterioration of six commercial resilient denture lining materials immersed in seven groups of denture cleansers was investigated. Although the grades of deterioration of these soft liners were not related to the amount of peroxide content or the pH of denture cleansers, the effects of peroxide cleansers were, with few exceptions, more severe than those of the other types. For example, an enzyme cleanser caused severe changes of one soft liner. The grades of surface porosity were correlated well with the log of the gelation time of the tissue conditioners (except for one soft liner), in four kinds of peroxide cleansers. These results suggest that various components of denture cleansers and soft lining materials, particularly peroxides, in cleansers and gel formation components of soft liners play important roles in the deterioration of soft liners caused by cleansers.
Acrylic Resins↗
Upper digestive tract burns caused by Denalan denture cleanser powder.
Denture cleansers are ubiquitous compounds frequently found in the household. Severe oral cavity burns were clinically observed in a two-year-old female who accidentally ingested a denture cleanser powder, Denalan. Experimental studies were carried out to investigate the caustic, chemical and histopathological properties of this compound. Denalan was found to be a powerful alkali agent which caused severe upper digestive tract burns.
Adult↗
Denture cleansers: Part I--A survey of the availability of denture cleansers in South Africa.
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Dentifrices↗
Commercial denture cleansers--cleansing efficacy against Candida albicans biofilm and compatibility wit soft denture-lining materials.
Chemical cleansing has been suggested as one of the most effective methods for plaque control, particularly for resilient denture-lining materials. These materials are known to be easily colonized and infected by Candida albicans. Maintaining the cleanliness of such materials is difficult because of porosity and incompatibility with some types of denture cleansers. Therefore, denture cleansers used for soft liners must address both microbiologic and physical requirements. This study evaluated the antifungal efficacy of 11 commercial denture cleansers on C albicans biofilm, studied the compatibility of tissue conditioners with denture cleansers, and makes suggestions for the chemical cleansing of dentures lined with tissue conditioners.
Acrylic Resins↗
Effect of denture cleansers on partial denture alloys and resilient liners.
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Bicarbonates↗
Compliance of resilient denture liners immersed in effervescent denture cleansers.
PURPOSE: Six resilient denture liners (RDL) were exposed to two immersion effervescent denture cleansers to evaluate change in compliance over a simulated 1 year time interval. MATERIALS AND METHODS: Ten samples of each material, Molloplast B, Mollosil, MPDS-SL, Permasoft, Softline, and Sofreliner were exposed to either Fixodent or Efferdent denture cleanser. A cyclic load was applied in a squarewave fashion to derive a load displacement curve to measure compliance at 0, 7, 30, 180, and 360 simulated days. RESULTS: All 12 of the material/cleanser combinations demonstrated a significant change in compliance at each time interval relative to baseline. Mollosil had the greatest increase in flexibility from baseline, and MPDS-SL had the smallest increase in flexibility. In general, chairside materials demonstrated greater change in compliance from baseline compared to laboratory materials. Materials subjected to Fixodent cleanser, when averaged over time, were significantly more flexible than materials exposed to Efferdent cleanser. CONCLUSIONS: Exposure of resilient soft liners to two common cleansers resulted in a significant increase in flexibility. This change in flexibility depended slightly, though significantly, on the type of cleanser, and appeared to be more significant with time. In general, chairside materials seemed to change more than laboratory-processed liners. The exception was Permasoft that was fabricated as a laboratory material but behaved like a chairside material. CLINICAL SIGNIFICANCE: The initiator of the polymerization reaction rather than the mode of polymerization may be more important in predicting a change in the flexibility of RDLs. Constituents within the oral environment may be more responsible for changes in RDL flexibility than denture cleansers.
Compliance↗
[Removal of denture calculus and the effect of denture cleansers on acrylic resin denture bases].
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Acrylic Resins↗
A comparison of three hard chairside denture reline materials. Part II. Changes in colour and hardness following immersion in three commonly used denture cleansers.
This study investigated the effects of daily use of three denture cleansers on three hard chairside reline materials over a 6-month period. Two controls were used; one dry and one involving storage in water. Colour and hardness were measured at 0 (baseline) and 6-months. There was no significant colour change with Tokuso Rebase Fast Set. Coe Kooliner and Total Hard changed colour more with the short acting peroxide cleanser (Steradent 3 Minutes) than with the overnight peroxide cleanser (Steradent Fresh) and the hypochlorite cleanser (Dentural). The hardness of all materials remained unchanged over the whole test period.
Acrylic Resins↗
Biofilm formation of Candida albicans on the surfaces of deteriorated soft denture lining materials caused by denture cleansers in vitro.
Candidal colonization and subsequent biofilm formation on denture materials are important in the development of pathogenesis, such as denture stomatitis. Routine use of denture cleansers is one of the most effective methods of denture plaque control, although the incompatibility of soft liners and denture cleansers cause damage to the materials. The present study, biofilm formation of Candida albicans on the surfaces of soft denture lining materials, immersed in denture cleansers for 180 days were studied. Seven commercially available soft denture lining materials, were artificially deteriorated by immersion into three commercially available denture cleansers for 180 days, and subsequent fungal growth and biofilm formation were studied by measuring pH of the media and by the use of adenosine triphosphate (ATP) analysis. Fungal biofilm formation on the deteriorated soft liners varied depending upon the combination of the soft liners and denture cleansers. Several combinations of soft liners with denture cleansers exhibited the significantly high colonization capacity as compared with each sample immersed in distilled water, used as individual controls. The relationship between the biofilm formation on the samples of each material and the surface roughness of the soft lining materials was analyzed. However, no significant correlation was observed. The results, taken together, suggested that fungal colonization could be predominantly regulated by the combination of lining material with denture cleansers. In clinical terms, our findings suggests that daily cleansing of soft lining materials with mismatched denture cleansers promoted the subsequent biofilm formation of fungi on the materials.
Biofilms↗
Compatibility of denture cleansers with some new self curing denture base materials.
All denture base materials are subjected to abrasion during function, but this will be greatest under certain denture cleansing regimens. Two new materials, a 'pour type' and a compression moulding acrylic resin were subjected to mechanical brushing with denture cleansers. It was found that abrasion resistance of the two materials was of the same order, and weight loss was greatest with one of the paste cleansers.
Acrylic Resins↗
The role of denture cleansers on the whitening of acrylic resins.
Dentists and denture wearers have reported that the regular use of a denture cleanser causes whitening of dentures. The whitening effect of denture cleansers on acrylic resin dentures was investigated using four different types of agents on six different types of acrylic resin discs. The color values of the samples were measured using a reflectometer. The greatest whitening effect was seen on autopolymerizing acrylic resins for one of the denture cleansers with all the resins tested.
Acrylic Resins↗
In vitro study on the effects of trial denture cleansers with berberine hydrochloride.
The antifungal activity of trial denture cleansers prepared with berberine hydrochloride was examined against Candida albicans, C. tropicalis, and C. glabrata. A commercial denture cleanser and a trial denture cleanser that exhibited strong antifungal activity were tested for their effects on Candida spp., the color stability of the dental material, and the surface roughness of acrylic resin plates. The results of these tests revealed that the trial denture cleanser removed 64% to 89% of adhered cells from acrylic resin surfaces and had little effect on the other physical properties tested.
Acrylic Resins↗
Effect of a denture cleanser on weight, surface roughness, and tensile bond strength of two resilient denture liners.
STATEMENT OF PROBLEM: Denture cleansers used in clinical practice can damage resilient denture lining materials. PURPOSE: This study evaluated the effects of a denture cleanser on weight change, roughness, and tensile bond strength on 2 denture resilient lining materials. MATERIAL AND METHODS: Forty specimens of microwave acrylic resin (Onda-Cryl), 30 mm in diameter and 4 mm thick, were prepared to verify weight change and surface roughness. The specimens were divided into 4 groups consisting of 10 specimens each, relined with a resilient liner (Coe Soft or Dentusoft), and treated (Polident or tap water). To evaluate tensile bond strength, 12 specimens were used for each group. All specimens were stored in artificial saliva for 15 days, immersed once a day in Polident or tap water, and evaluated at 0 hours and after 24 hours and 7 and 15 days. Roughness was evaluated by use of a profilometer. Weight changes were recorded in milligrams and expressed as the percentage of weight difference between the periods of evaluation. Tensile bond strength was determined with a universal testing machine. The specimens were placed under tension until failure by a cross-speed of 5 mm/min with a 500 Kg load cell. The type of failure was determined by use of stereoscopic microscopy at original magnification x8. The data were submitted to analysis of variance and compared by Tukey's test (alpha=.05). RESULTS: Specimens immersed in Polident showed higher and significant (P<.05) weight changes (%) than those immersed in water between 24 hours and 7 days (Coe Soft-Polident: 0.48 +/- 0.09; Coe Soft-water: 0.28 +/- 0.09; Dentusoft-Polident: 0.44 +/- 0.16; Dentusoft-water: 0.22 +/- 0.15) and between 7 and 15 days (Coe Soft-Polident: 0.08 +/- 0.04; Coe Soft-water: -0.17 +/- 0.05; Dentusoft-Polident: 0.01 +/- 0.04; Dentusoft-water: - 0.24 +/- 0.03). There was significant difference (P<.05) in roughness (in micrometers), between treatments after 7 days (Coe Soft-water: 4.07 +/- 0.22; Coe Soft-Polident: 3.36 +/- 0.52; Dentusoft-water: 3.68 +/- 0.72; Dentusoft-Polident: 3.26 +/- 0.41) and 15 days (Coe Soft-water: 4.88 +/- 0.29; Coe Soft-Polident:3.53 +/- 0.61; Dentusoft-water: 4.42 +/- 1.12; Dentusoft-Polident: 3.68 +/- 0.37). Tensile bond strength was highest (P<.05) after 15 days (Coe Soft-water: 5.19 +/- 0.93; Coe Soft-Polident: 4.40 +/- 0.38; Dentusoft-water: 4.42 +/- 1.15; Dentusoft-Polident: 4.84 +/- 1.14). Most failures were cohesive (Coe Soft: 76.04% and Dentusoft: 82.29%). CONCLUSION: Within the limitations of this in vitro study, specimens immersed in Polident demonstrated increased weight changes of resilient liners when compared with tap water, but surface roughness and tensile bond strength were unaffected.
Acrylic Resins↗
A review of in vitro and in vivo methods to evaluate the efficacy of denture cleansers.
PURPOSE: This review summarizes the methods employed to evaluate denture cleansers and makes some suggestions on the methodology of evaluation. MATERIALS AND METHODS: More than 20 articles evaluating the efficacy of denture cleansers were compared, and the advantages and disadvantages of each method were evaluated. RESULTS: The results obtained vary depending on the methods used to evaluate the efficacy of denture cleansers, particularly among in vitro and in vivo assays. In addition, it is pointed out that chemical denture cleansers are not as efficacious in clinical use as in the in vitro assay. The uncertainty over efficacy may be caused by nonstandardized methodology and reports of conflicting results. CONCLUSION: A standardization of the methodology is needed. This should include evaluation of the efficacy of cleansers through both in vivo and in vitro assay methods; standardization of the materials and methods used in studying the efficacy of denture-cleansing regimens; and the examination of not only selected microorganisms from limited surface areas of a denture, but the microorganisms in denture plaque from the whole surface of a denture. It would also be preferable to use methods and/or media that make it possible to not only qualify but also quantify the microbial plaque.
Dental Plaque↗
Denture plaque and denture cleansers.
Literature concerning the relationship between denture plaque, oral pathology, and the nature and effectiveness of the products commercially available for cleaning dentures has been reviewed. The literature reports indicate that (1) plaque on the tissue surface side of the denture is unquestionably a major etiologic factor in the pathogenesis of denture stomatitis, inflammatory papillary hyperplasia, and chronic candidiasis and (2) there are shortcomings in the popular products used by the public to clean their dentures. The protocol and results of a study to test the plaque removal effectiveness of a new denture cleansing product are described. In this study, the plaque removal effectiveness of the ultrasonic device tested, when used with water alone, was found to be substantially greater than that of two popular alkaline-peroxide soak-type denture cleansers, Efferdent and Polident.
Dental Plaque↗
Corrosive injury of the esophagus. Result of ingesting some denture cleanser tablets and powder.
Denture cleansers are ubiquitous compounds frequently found in the household. Experimental studies were carried out to investigate the caustic, chemical, and histopathological properties of Polident and Efferdent tablets and Ansodent powder. All products were found to have caused severe focal to diffuse caustic burns of the esophagus due to the concentration of hydrogen peroxide that was liberated by these compounds.
Animals↗