An evaluation of the mechanical properties of Type III and Type IV gypsum mixed with two disinfectant solutions.

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dc.contributor.authorRoy, Sunitha M
dc.contributor.authorSridevi, J
dc.contributor.authorKalavathy, N
dc.date.accessioned2012-07-26T10:22:41Z
dc.date.available2012-07-26T10:22:41Z
dc.date.issued2010-07
dc.description.abstractBackground and Objectives: This in-vitro study was conducted to evaluate the strength and properties of Type III and Type IV gypsum mixed with disinfectant solutions. Materials and Methods: Type III and Type IV gypsum were used for the study. Three different mixing solutions namely waterqueous solutions of 0.525% sodium hypochlorite and 2% glutaraldehyde were used. Gypsum materials were subjected to further modification by adding a mixture of 1.0% gum arabic and 0.132% calcium hydroxide before mixing with the disinfectant solutions, at two different liquid/powder (L/P) ratios for each. Both, the unmodified and the modified gypsum were tested for compressive and tensile strength after one hour and one week from the start of the mix. The crystalline configuration of the fracture fragments of the unmodified and modified set gypsum were studied under the scanning electron microscope. Results: The disinfectant solutions reduced the strength of both Type III and Type IV gypsum. Water showed higher-strength, which was followed by 0.525% sodium hypochlorite and 2% glutaraldehyde. The modified Type III and Type IV gypsum with reduced L/P ratio also showed strength values less than that of the control groups. Interpretation and Conclusion: Chemical disinfectants reduced the strength of gypsum when used as water substitutes. Gum Arabic and calcium hydroxide additives permitted lower L/P ratio, however, there was still excess water retained in the set gypsum that lowered the strength values of Type III and Type IV gypsum. Hence, further reduction of L/P ratio may increase the properties of the modified Type III and Type IV gypsum.en_US
dc.identifier.citationRoy Sunitha M, Sridevi J, Kalavathy N. An evaluation of the mechanical properties of Type III and Type IV gypsum mixed with two disinfectant solutions. Indian Journal of Dental Research. 2010 Jul-Sept; 21(3): 374-379.en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/139885
dc.language.isoenen_US
dc.source.urihttps://www.ijdr.in/article.asp?issn=0970-9290;year=2010;volume=21;issue=3;spage=374;epage=379;aulast=Royen_US
dc.subjectCalcium hydroxideen_US
dc.subjectcompressive strengthen_US
dc.subjectdiametric tensile strengthen_US
dc.subjectglutaraldehydeen_US
dc.subjectgum arabicen_US
dc.subjectgypsumen_US
dc.subjectsodium hypochloriteen_US
dc.subject.meshCalcium Hydroxide --chemistry
dc.subject.meshCalcium Sulfate --chemistry
dc.subject.meshCompressive Strength
dc.subject.meshCrystallography
dc.subject.meshDental Disinfectants --chemistry
dc.subject.meshDental Materials --chemistry
dc.subject.meshDental Stress Analysis --instrumentation
dc.subject.meshGlutaral --chemistry
dc.subject.meshGum Arabic --chemistry
dc.subject.meshHumans
dc.subject.meshHumidity
dc.subject.meshMaterials Testing
dc.subject.meshMechanical Phenomena
dc.subject.meshMicroscopy, Electron, Scanning
dc.subject.meshPowders
dc.subject.meshSodium Hypochlorite --chemistry
dc.subject.meshSolutions
dc.subject.meshStress, Mechanical
dc.subject.meshTensile Strength
dc.subject.meshTime Factors
dc.subject.meshWater --chemistry
dc.titleAn evaluation of the mechanical properties of Type III and Type IV gypsum mixed with two disinfectant solutions.en_US
dc.typeArticleen_US
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