Impact of a functionally graded configuration on the thermal residual stresses in dental restorations

Impact of a functionally graded configuration on the thermal residual stresses in dental restorations

Henriques, Bruno; Miranda, Georgina; Gasik, Michael; Nascimento, Rubens; Souza, Julio C.M.; Silva, Filipe

Abstract:

The aim of this work was to employ the FE method on the study of the thermally induced stresses in metal-ceramic dental restorations with different interface configurations: conventional sharp transition, 50%M composite interlayer and a compositionally graded transition (FGM interlayer). The FE analysis was performed based on experimental data obtained from Dynamic Mechanical Analysis (DMA) and Dilatometric (DIL) studies of the monolithic materials and metal/ceramic composites. Results have shown significant stress reduction promoted by the 50M interlayer and FGM interlayer when compared to those observed for the conventional sharp transition configuration. Maximum stresses were reduced by 50% and FGM provided smoother stress profiles. The reduction in stress magnitude and smoothness of the stress distribution profile due to the FGM architectures has been suggested to account for improvements of metal-ceramic systems in regard to their clinical performance. The findings of this study are in good agreement with the experimental data obtained for metal-ceramic restorative systems and reported in literature.

The aim of this work was to employ the FE method on the study of the thermally induced stresses in metal-ceramic dental restorations with different interface configurations: conventional sharp transition, 50%M composite interlayer and a compositionally graded transition (FGM interlayer). The FE analysis was performed based on experimental data obtained from Dynamic Mechanical Analysis (DMA) and Dilatometric (DIL) studies of the monolithic materials and metal/ceramic composites. Results have shown significant stress reduction promoted by the 50M interlayer and FGM interlayer when compared to those observed for the conventional sharp transition configuration. Maximum stresses were reduced by 50% and FGM provided smoother stress profiles. The reduction in stress magnitude and smoothness of the stress distribution profile due to the FGM architectures has been suggested to account for improvements of metal-ceramic systems in regard to their clinical performance. The findings of this study are in good agreement with the experimental data obtained for metal-ceramic restorative systems and reported in literature.

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Henriques, Bruno; Miranda, Georgina; Gasik, Michael; Nascimento, Rubens; Souza, Julio C.M.; Silva, Filipe; "Impact of a functionally graded configuration on the thermal residual stresses in dental restorations", p-47-47. In: Proceedings of the 13th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials [=Blucher Material Science Proceedings, v.1, n.1]. São Paulo: Blucher, 2014.
ISSN 23589337, DOI