Chemical and mechanical properties of experimental dental composites as a function of formulation and postcuring thermal treatment
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2018
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BioMed Research International
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This study evaluated the influence of formulation and thermal treatment on the degree of conversion, fracture toughness, flexural
strength, and elasticmodulus of experimental composites. Six composites were analyzed at BisGMA: TEGDMAmolar ratios of 1 : 1
and 7 : 3 with filler at 30, 50, and 70wt%.The degree of conversionwas analyzed by Fourier transforminfrared spectroscopy, fracture
toughness was measured using the single-edge notched beam, and flexural strength and elastic modulus were measured with the
3-point bend test. For all tests, one-half of the specimens received thermal treatment at 170∘C for 10 min. Data were analyzed by the
Kruskal-Wallis or ANOVA/Tukey’s test (𝛼 = 5%).The 1 : 1 BisGMA : TEGDMA ratio showed higher properties than the 7 : 3 ratio.
Although the material with 70% filler had a conversion lower than the one with 50%, it showed higher mechanical properties.The
thermal treatment improved all properties in all materials. Therefore, the use of an equimolar ratio of BisGMA: TEGDMA can
be paired with 70 wt% filler to design dental composites that possess increased advantageous physical and chemical properties.
Furthermore, the simple and low-cost method of thermal treatment proposed for use in clinical dentistry has been shown to
effectively improve the properties of all evaluated materials.
Como referenciar
ESTEVES, RENATA A.; BOARO, LETICIA C.C.; GONÇALVES, FLAVIA; CAMPOS, LUIZA M.P.; SILVA, CECY M.; RODRIGUES-FILHO, LEONARDO E. Chemical and mechanical properties of experimental dental composites as a function of formulation and postcuring thermal treatment. BioMed Research International, v. 2018, p. 1-6, 2018. DOI: 10.1155/2018/9845427. Disponível em: http://repositorio.ipen.br/handle/123456789/29932. Acesso em: 13 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.