In vitro comparison of flexural strength and elastic modulus of three provisional crown materials used in fixed prosthodontics
NAGIOS: RODERIC FUNCIONANDO

In vitro comparison of flexural strength and elastic modulus of three provisional crown materials used in fixed prosthodontics

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In vitro comparison of flexural strength and elastic modulus of three provisional crown materials used in fixed prosthodontics

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dc.contributor.author Poonacha, Vachan es
dc.contributor.author Poonacha, Seema es
dc.contributor.author Salagundi, Basavaraj es
dc.contributor.author Rupesh, P.-L. es
dc.contributor.author Raghavan, Rohit es
dc.date.accessioned 2014-05-22T09:42:31Z
dc.date.available 2014-05-22T09:42:31Z
dc.date.issued 2013 es
dc.identifier.uri http://hdl.handle.net/10550/35359
dc.source Poonacha, Vachan ; Poonacha, Seema ; Salagundi, Basavaraj ; P.-L., Rupesh ; Raghavan, Rohit. In vitro comparison of flexural strength and elastic modulus of three provisional crown materials used in fixed prosthodontics. En: Journal of Clinical and Experimental Dentistry, 2013, Vol. 5, No. 5: 212-217 es
dc.subject Odontología es
dc.subject Ciencias de la salud es
dc.title In vitro comparison of flexural strength and elastic modulus of three provisional crown materials used in fixed prosthodontics es
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.description.abstractenglish Objectives: To evaluate and compare the flexural strength and the elastic moduli of three provisional crown materials (methyl methacrylate based autopolymerized resin, bis acryl composite based autopolymerized resin and urethane dimethacrylate based light polymerized resin) after storing in artificial saliva and testing at intervals of 24 hours and 7 days. Study design: A metal master mould with four slots of dimensions 25x2x2 mm was fabricated to obtain samples of standard dimensions. A total of 135 specimens were thus obtained with 45 each of three provisional materials. Further 15 samples of each group were tested after storing for one hour at room temperature and again at intervals of 24 hours and 7 days after storing in artificial saliva. Three point flexural tests were carried out in the universal testing machine to calculate the flexural strength and the elastic modulus. The changes were calculated and data was analyzed with Fisher's test and ANOVA. Results: The flexural strength of the methyl methacrylate resin reduced significantly while bis-acrylic composite resin showed a significant increase in its flexural strength after storing in artificial saliva for 24 hours and the values of both remained constant thereafter. Contrary to these findings, light polymerized resin showed a significant decrease in flexural strength after storing in artificial saliva for 24 hours and then significantly increased in flexural strength after 7 days. However the changes in the values for elastic modulus of respective materials were statistically insignificant. Conclusion: Methacrylate based autopolymerizing resin showed the highest flexural strength and elastic moduli after fabrication and after storing in artificial saliva and for 24 hours and 7 days. Bis-acrylic composite resin showed the least flexural strength and elastic moduli. es

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