ESTEVES, RENATA A.BOARO, LETICIA C.C.GONÇALVES, FLAVIACAMPOS, LUIZA M.P.SILVA, CECY M.RODRIGUES-FILHO, LEONARDO E.2019-07-232019-07-232018ESTEVES, 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. <b>BioMed Research International</b>, v. 2018, p. 1-6, 2018. DOI: <a href="https://dx.doi.org/10.1155/2018/9845427">10.1155/2018/9845427</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/29932.2314-6133http://repositorio.ipen.br/handle/123456789/29932This 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.1-6openAccesscomposite materialsmethacrylatesaminesglycolsresinsthermal gravimetric analysisArtigo de periódico201810.1155/2018/984542740.8170.50