Denture plaque — past and recent concerns

Nikawa, Hiroki; Hamada, Takashi; Yamamoto, Takaharu

doi:10.1016/s0300-5712(97)00026-2

Cited by 242 publications

(244 citation statements)

References 42 publications

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“…Oxygen might cause a chemical softening of the resin surface by damaging interchain forces in the polymer. Nikawa et al 3) reported that the high peroxide content and level of oxygenation in the strongly alkaline solution is the damaging factor for denture base materials. In the current study, specimens were immersed into each of the 3 denture cleansers for 15 min at 50ºC.…”

Section: Discussionmentioning

confidence: 99%

“…Denture cleansers are used to provide adequate denture plaque control, prevent halitosis, remove discoloring caused by foods and drinks, eliminate Candida albicans and Candida glabrata and other microorganisms, to dissolve calculus and prevent denture-induced stomatitis [3][4][5] . In patients, particularly those who are very old, have Alzheimer's disease, dementia or low motor capacity, the use of chemical agents may be the only means of denture hygiene 6,7) .…”

Section: Introductionmentioning

confidence: 99%

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Comparative effects of denture cleansers on physical properties of polyamide and polymethyl methacrylate base polymers

et al. 2013

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative effects of denture cleansers on physical properties of polyamide and polymethyl methacrylate base polymers

et al. 2013

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“…The last is attributed to its porous surface and has been associated with oral infections such as denture-induced stomatitis. 2,3 Candida species are dominant in this denture biofilm, 4 but another pathogen, methicillin-resistant Staphylococcus aureus (MRSA) has also been isolated from the oral cavity of elderly or hospitalized patients, and its presence could have implications in regard to cross infection and systemic infection. 5,6 The initial adhesion of microorganisms on surfaces depends on their physical and chemical properties along with those of the substrates and environmental solutions.…”

Section: Introductionmentioning

confidence: 99%

Effect of different initial finishes and Parylene coating thickness on the surface properties of coated PMMA

Bourlidi

Qureshi²,

Soo

et al. 2016

The Journal of Prosthetic Dentistry

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Statement of the Problem. The colonization of micro-organisms on acrylic resin dentures may result in denture-induced stomatitis. No efficient coating has yet been proposed to address this issue. Purpose. The purpose of this in vitro study was to assess the effect of various initial surface finishes and different Parylene (P) coating thicknesses on the surface roughness (Ra) and surface free energy (SFE) of Parylene coated polymethyl methacrylate (PMMA). Material and Methods. One hundred and sixty PMMA specimens were produced and divided into 8 groups as follows: Group A: uncoated-1000grit finish; group Ap1: 10 μm P coated -1000grit finish; group B: uncoated -1200grit finish; group Bp: 10 μm P coated -1200grit finish; group C: uncoated2400grit finish; group Cp: 10 μm P coated -2400grit finish; group Ap2: 20 μm P coated -1000grit finish; group Ap3: 30 μm P coated -1000grit finish. The Ra of all specimens was measured with a noncontact profilometer. To calculate the SFE, the Owens-Wendt approach was applied after measuring the contact angles with a goniometer. The topography of the specimens was observed by scanning electron microscope. I am happy to report that the reviewers of manuscript #JPD-D-15-00013R3, entitled "The effect of different initial finishes and Parylene coating thickness on the surface properties of coated PMMA," have recommended that it be accepted for publication, pending your responses to the following final requests:Please review the edited manuscript to ensure that your meaning has not been inadvertently altered. Please address the comments.Answer: Thank you for the acceptance of our work for publication to the JPD. We are now submitting the final revision of the manuscript entitled "The effect of different initial finishes and Parylene coating thickness on the surface properties of coated PMMA". We have accepted all Track Changes and responded to the minor queries requested. The additions are marked in blue as per the instructions.We have uploaded the TIFF files of the images without labels as requested. The images uploaded are not in composite form, but individual images. We have only left the composite images in the manuscript file for ease of final proof editing by your team.

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“…To relate the color alterations (∆E) to the clinical environment, data were quantified by the National Bureau of Standards (NBS) units (17) through the formula: NBS units = ∆E x 0.92 and then classified according to the scale: 1) Trace: 0.0-0.5; 2) Slight: 0.5-1.5; 3) Noticeable: 1.5-3.0; 4) Considerable: 3.0-6.0; 5), much: 6.0-12.0; 6) very much: +12.0.…”

Section: Color Measurementmentioning

confidence: 99%

“…Some authors have concluded that the daily use of denture cleansers can affect the properties of denture acrylic resin 16 . Denture base polymers are susceptible to color change if the cleaning solutions are not correctly used 17 . The surface roughness is of great clinical relevance since it can affect biofilm formation and make it difficult to remove 18 .…”

Section: Introductionmentioning

confidence: 99%

Effect of Denture Cleansers on Flexural Strength, Color Stability and Surface Roughness of Flexible and Microwave cured Acrylic Resin

2017

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Purpose:The aim of the present study was to evaluate the effect of denture cleansers on the flexural strength, color stability and surface roughness of flexible denture base resin as well as micro wave cured denture base resin. Materials and Methods: A total of 144 specimens were fabricated. Seventy two specimens were constructed from each type of resin and were further subdivided into 3 subgroups (n=24) according to their immersion in different types of denture cleansers. Subgroup1: distilled water (control), subgroup 2: 5% sodium hypochlorite and subgroup 3: effervescent alkaline tablets (Corega tabs). The color changes and surface roughness were measured for each subgroup before (baseline) and after immersion in the solutions. The flexural strength was also measured after their immersion. Results: For both groups (flexible denture base resin and microwave cured denture resin groups); control subgroup showed the statistically significant higher flexural strength values, while subgroup treated with Corega Tabs recorded the statistically significant lowest flexural strength values. Regarding the color changes, for both groups (flexible denture base resin and microwave cured denture resin groups); subgroup treated with Corega Tabs recorded statistically significant highest (ΔE) mean values, followed by subgroup treated with sodium hypochlorite then the control subgroup. However, there was a statistically non-significant difference of the Ra values between the tested groups and subgroups. Conclusions: Within the limitations of the study, it was concluded that the tested denture cleansers had no effect on the surface roughness of flexible and microwave cured acrylic resin, however, significantly influenced their flexural strength. Moreover, denture base polymers are susceptible to color change on immersion in Corega Tabs.

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Denture plaque — past and recent concerns

Cited by 242 publications

References 42 publications

Comparative effects of denture cleansers on physical properties of polyamide and polymethyl methacrylate base polymers

Comparative effects of denture cleansers on physical properties of polyamide and polymethyl methacrylate base polymers

Effect of different initial finishes and Parylene coating thickness on the surface properties of coated PMMA

Effect of Denture Cleansers on Flexural Strength, Color Stability and Surface Roughness of Flexible and Microwave cured Acrylic Resin

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