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Influence of different thermopolymerization methods on composite resin microhardness

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Influence of different thermopolymerization methods on composite resin microhardness

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dc.contributor.author Dias, Marlon-Ferreira es
dc.contributor.author Espíndola Castro, Luís Felipe es
dc.contributor.author Lins-Filho, Paulo-Cardoso es
dc.contributor.author Teixeira, Hilcia Mezzalira es
dc.contributor.author Silva, Claudio Heliomar Vicente es
dc.contributor.author Guimarães, Renata-Pedrosa es
dc.date.accessioned 2020-10-22T11:50:50Z
dc.date.available 2020-10-22T11:50:50Z
dc.date.issued 2020 es
dc.identifier.citation Dias, Marlon-Ferreira ; Espíndola Castro, Luís Felipe ; Lins-Filho, Paulo-Cardoso ; Teixeira, Hilcia Mezzalira ; Silva, Claudio Heliomar Vicente ; Guimarães, Renata-Pedrosa. Influence of different thermopolymerization methods on composite resin microhardness. En: Journal of Clinical and Experimental Dentistry, 12 4 2020: 335-341 es
dc.identifier.uri https://hdl.handle.net/10550/76026
dc.description.abstract Background: Additional heat polymerization in composite resins allows greater effective ness of microhardness, flexural strength, fracture tough ness, wear resistance, and increased color stability.Material and Methods: 150 composite resin specimens were made using a 4 mm diameter and 2 mm thick bipartite steel matrix. Five resins composed of different compositions were tested (Brilliant Everglow/Coltene, Filtek One BulkFill/3M, Filtek P60/3M, Filtek Z350XT/3M, Filtek Z250XT/3M), and for each of them three types of polyme-rization were tested: light curing only (n=50); photopolymerization + autoclave thermopolymerization (n=50) and photopolymerization + microwave thermopolymerization (n=50). Each specimen was submitted to three indenta-tions by means of the Vickers microhardness test, applying a load of 300gf, associated with the time of 15s. Data were analyzed descriptively by means of statistics, standard deviation and coefficient of variation and inferentially by the F test (ANOVA) in the comparison between groups. The margin of error used in statistical test decisions was 5%.Results: The highest vicker microhardness averages were from the Control group (light curing only) on P60 (82.16) and Z250 XT (79.61) resins. The lowest averages were all verified on Brilliant Everglow resin in all polymerization methods studied: Photopolymerization (37.32), with microwave (43.80) and autoclave (45.12), followed by Bulk Fill 3M resin, ranged from 52.23 to 59.15.Conclusions: Both autoclave and microwave thermopolymerization methods showed similar behavior on the mi-crohardness of the composites studied. Considering the resin type, there was a varied behavior compared to thermo-polymerization, which increased the microhardness values for Brilliant Everglow resins (Coltene) and Filtek One Bulkfill (3M) and decreased for Filtek P60, Filtek Z350XT and Filtek Z250XT resins. es
dc.title Influence of different thermopolymerization methods on composite resin microhardness es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.identifier.doi 10.4317/jced.56772 es
dc.type.hasVersion VoR es_ES

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