Effect of different light curing units on Knoop hardness and temperature of resin composite.

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dc.contributor.authorGuiraldo, Ricardo Danil
dc.contributor.authorConsani, Simonides
dc.contributor.authorConsani, Rafael Leonardo Xediek
dc.contributor.authorMendes, Wilson Batista
dc.contributor.authorLympius, Thais
dc.contributor.authorSinhoreti, Mario Alexandre Coelho
dc.date.accessioned2012-07-23T06:29:38Z
dc.date.available2012-07-23T06:29:38Z
dc.date.issued2009-07
dc.description.abstractAim: To evaluate the influence of quartz tungsten halogen and plasma arc curing (PAC) lights on Knoop hardness and change in polymerization temperature of resin composite. Materials and Methods: Filtek Z250 and Esthet X composites were used in the shade A3. The temperature increase was registered with Type-k thermocouple connected to a digital thermometer (Iopetherm 46). A self-cured polymerized acrylic resin base was built in order to guide the thermocouple and to support the dentin disk of 1.0 mm thickness obtained from bovine tooth. On the acrylic resin base, elastomer mold of 2.0 mm was adapted. The temperature increase was measured after composite light curing. After 24 h, the specimens were submitted to Knoop hardness test (HMV-2000, Shimadzu, Tokyo, Japan). Data were submitted to ANOVA and Tukey's test (a = 0.05). Results: For both composites, there were no significant differences (P > 0.05) in the top surface hardness; however, PAC promoted statistically lower (P < 0.05) Knoop hardness number values in the bottom. The mean temperature increase showed no significant statistical differences (P > 0.05). Conclusion: The standardized radiant exposure showed no influence on the temperature increase of the composite, however, showed significant effect on hardness values.en_US
dc.identifier.citationGuiraldo Ricardo Danil, Consani Simonides, Consani Rafael Leonardo Xediek, Mendes Wilson Batista, Lympius Thais, Sinhoreti Mario Alexandre Coelho. Effect of different light curing units on Knoop hardness and temperature of resin composite. Indian Journal of Dental Research. 2009 Jul-Sept; 20(3): 308-312.en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/139739
dc.language.isoenen_US
dc.source.urihttps://www.ijdr.in/article.asp?issn=0970-9290;year=2009;volume=20;issue=3;spage=308;epage=312;aulast=Guiraldoen_US
dc.subjectHardnessen_US
dc.subjectheat generationen_US
dc.subjectphotoactivationen_US
dc.subjectradiant exposureen_US
dc.subjecttemperature increaseen_US
dc.subject.meshAnalysis of Variance
dc.subject.meshAnimals
dc.subject.meshCattle
dc.subject.meshComposite Resins --chemistry
dc.subject.meshComposite Resins --radiation effects
dc.subject.meshCuring Lights, Dental --classification
dc.subject.meshCuring Lights, Dental --standards
dc.subject.meshDental Enamel --drug effects
dc.subject.meshDental Materials --chemistry
dc.subject.meshDental Materials --radiation effects
dc.subject.meshDental Restoration, Permanent --standards
dc.subject.meshHardness --radiation effects
dc.subject.meshHot Temperature
dc.subject.meshLight-Curing of Dental Adhesives --methods
dc.subject.meshReference Values
dc.subject.meshStatistics, Nonparametric
dc.titleEffect of different light curing units on Knoop hardness and temperature of resin composite.en_US
dc.typeArticleen_US
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