Thermal characterization of dental composites by TG/DTG and DSC

Dental composites can be improved by heat treatment, as a possible way to increase mechanical properties due to additional cure (post-cure). Direct dental composites are essentially similar to the indirect ones, supposing they have the same indication. Therefore, to establish a heat treatment protocol for direct composites, using as indirect (photoactivated by continuous and pulse-delay techniques), a characterization (TG/DTG and DSC) is necessary to determine parameters, such as mass loss by thermal decomposition, heat of reaction and glass transition temperature (T (g)). By the results of this study, a heat treatment could be carried out above 160 A degrees C (above T (g), and even higher than the endset exothermic event) and under 180 A degrees C (temperature of significant initial mass loss).

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

CAPES

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

CNPq

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

FAPESP