Effect Of Repeated Disinfections By Microwave Energy On The Physical And Mechanical Properties Of Denture Base Acrylic Resins.

dc.creatorConsani, Rafael Leonardo Xediek
dc.creatorAzevedo, Douglas Duenhas de
dc.creatorMesquita, Marcelo Ferraz
dc.creatorMendes, Wilson Batista
dc.creatorSaquy, Paulo César
dc.date2009
dc.date2015-11-27T13:15:32Z
dc.date2015-11-27T13:15:32Z
dc.date.accessioned2018-03-29T01:09:24Z
dc.date.available2018-03-29T01:09:24Z
dc.identifierBrazilian Dental Journal. v. 20, n. 2, p. 132-7, 2009.
dc.identifier1806-4760
dc.identifier
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/19738946
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/198465
dc.identifier19738946
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1298698
dc.descriptionThe present study evaluated the effect of repeated simulated microwave disinfection on physical and mechanical properties of Clássico, Onda-Cryl and QC-20 denture base acrylic resins. Aluminum patterns were included in metallic or plastic flasks with dental stone following the traditional packing method. The powder/liquid mixing ratio was established according to the manufacturer's instructions. After water-bath polymerization at 74 degrees C for 9 h, boiling water for 20 min or microwave energy at 900 W for 10 min, the specimens were deflasked after flask cooling and finished. Each specimen was immersed in 150 mL of distilled water and underwent 5 disinfection cycles in a microwave oven set at 650 W for 3 min. Non-disinfected and disinfected specimens were subjected to the following tets: Knoop hardness test was performed with 25 g load for 10 s, impact strength test was done using the Charpy system with 40 kpcm, and 3-point bending test (flexural strength) was performed at a crosshead speed of 0.5 mm/min until fracture. Data were analyzed statistically by ANOVA and Tukey's test (alpha= 0.05%). Repeated simulated microwave disinfections decreased the Knoop hardness of Clássico and Onda-Cryl resins and had no effect on the impact strength of QC-20. The flexural strength was similar for all tested resins.
dc.description20
dc.description132-7
dc.languageeng
dc.relationBrazilian Dental Journal
dc.relationBraz Dent J
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectAcrylic Resins
dc.subjectDental Stress Analysis
dc.subjectDenture Bases
dc.subjectDisinfection
dc.subjectHardness
dc.subjectMicrowaves
dc.subjectPliability
dc.titleEffect Of Repeated Disinfections By Microwave Energy On The Physical And Mechanical Properties Of Denture Base Acrylic Resins.
dc.typeArtículos de revistas


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