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Article
The Influence of Natural Products as Denture Cleansers on Candida albicans Colonization to Cobalt–Chromium Alloy Denture Base Ma-terial.

Author: Nadia T Jaffer
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: 21 Pages: 124-130
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The study aims to evaluate the influence of various denture cleansers on colonization of Candi-da albicans to Cobalt–Chromium alloy denture base and the subsequent roughness assosiated with these cleansers. Materials and methods: Thirty–six samples of Co–Cr denture base and five cleansers, four prepared(alum, salt, soda+vinegar, soda+thymol), one commercial ( protefix ) and distilled wa-ter(D.W) as a control were used. Samples were immersed in denture cleansers for one month in which each cleanser had 6 samples excluding 6 samples in D.W as a control. Half of samples for each cleans-er were immersed ½ hr per day and the other half immersed 8hrs per day through one month, before microbiological examination, samples were tested for surface roughness using profilometer. Candida albicans cell suspension was incubated with the test samples for 1hr at 37°C after which the test sam-ples were immersed in their cleansers for 1hr. Visualization, inspection and enumeration of adherent C.albicans cells and detection of the anti–adherent effect of the cleansers was achieved by using light microscopy. Results: The results demonstrated insignificant difference in surface roughness of Co–Cr alloy denture base in the cleansers at 1/2 hr and a significant difference at 8 hrs immersion. There was a significant difference in C.albicans colonization to Co–Cr denture base in which all the cleansers showed less adhesion than control. The results also revealed that (soda+Thymol oil) cleanser ex-pressed the least values of colonization and roughness among other cleansers. Conclusions: The cleansers were effective as anti–adherent yeast cells to Co–Cr denture base and showed roughness de-grees less than control


Article
Comparisons the microhardness of different cured acrylic denture base systems after subjected to chemical cleaning solutions

Author: Dr. Hawraa Khalid Aziz, B.D.S, M.Sc.* د. حوراء خالد عزيز
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2013 Volume: 10 Issue: 1 Pages: 77-87
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

In selecting chemical cleaning solutions for dental prostheses, compatibilitybetween them and the type of denture base materials must be considered to avoidadverse effects on the hardness of the acrylic resin in different curing systems. Thisstudy aimed to compare the effect of different disinfectant and denture cleanser on thesurface hardness of the light and heat cured acrylic resin materials. Eighty specimensare made from two different denture base materials. Forty specimens are made oflight cured acrylic and forty specimens are made of heat cured acrylic resin. Eachmaterial is subdivided into four subgroups according to the type of the disinfectant(0.12% chlorhexidine digluconate, 0.5% sodium hypochlorite), the denture cleansers(Corega) and compared to the distilled water as control group. The surface hardnesstest is measured for each specimen to show the effect of each chemical cleaningsolution on the light and heat cured denture base hardness. The results of the presentstudy showed non significant differences in the surface hardness comparing betweenthe two curing systems light and heat cured acrylic resin. Also there are nonsignificant differences in the surface hardness when different disinfectant and denturecleansers have been used in comparison to the distilled water. It was concluded fromthis study that the hardness of acrylic materials is not affected by immersion in anytype of disinfectant and denture cleanser as well as it is found that there is no differentin the hardness of the light cured when compared to the heat cured acrylic denturebase.


Article
Evaluation of surface roughness and Candida albicans attachment on light cured and heat cured acrylic denture base resin using Corega, Fittydent and Lacalut denture cleansers

Author: Dr. Hawraa Khalid Aziz, B.D.S, M.Sc.* د. حوراء خالد عزيز
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2015 Volume: 12 Issue: 1 Pages: 53-65
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Background: Denture cleansers are the most widely used by the patients to maintainclean denture as the presence of Candida albicans on the surfaces of denture-baseacrylic resins is strongly related to the development of oral stomatitis but thecleansers may have harmful effect on some properties of the denture. So the aimof this study is to evaluate and compare the effect of different denture cleansers onthe surface roughness and adherence of the Candida albicans on the light and heatcured acrylic resin materials.Materials and methods: Eighty specimens were made from two different denturebase materials for each test. Forty specimens were made of light cured acrylic andforty specimens were made of heat cured acrylic resin. Each material group wassubdivided into four subgroups according to the type of the denture cleansers andthe distilled water that was used as control group. Antimicrobial activity and thesurface roughness test were measured for each specimen to show the effect ofeach denture cleansers on surface of the denture base materials.Results: The results showed that there were highly significant differences in theantimicrobial activity before and after the use of denture cleansers while therewere no significant differences in surface roughness between before and afterimmersion in the denture cleansers for both acrylic specimens. While the surfaceroughness and the Candida albicans attachment to light cured acrylic wassignificantly higher than that of heat cured acrylic specimens.Conclusion: It was concluded that the Candida albicans attachment was effected bythe immersion in the denture cleansers while the roughness of acrylic materialswas not affected by immersion in denture cleansers as well as it was found that theCandida albicans attachment and the surface roughness of the light cured washigher than the heat cured acrylic denture base.

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