Improving the functional design of dental restorations by adding a composite interlayer in the multilayer system: multi-aspect analysis

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

doi:10.1016/j.ctmat.2015.06.002

ISSN: 0870-8312

Ciência & Tecnologia dos Materiais is the official journal of SPM, the Portuguese Society of Materials (Sociedade Portuguesa de Materiais), providing a forum for publishing peer-reviewed papers related to both fundamentals of materials science and technological application of engineering materials. The scope of the journal covers a wide range of topics in materials science that are of interest to the SPM, encompassing electrochemistry, corrosion and protection of materials, extractive metallurgy and recycling, electronic and optoelectronic materials, biomaterials, forest materials, polymeric and composite materials, foundry, heat treatment and surface engineering, tribology, and fracture. Science and Technology of Materials welcomes contributions in the form of original research papers, review articles and technical notes reporting advances on those fields, emphasizing new materials, new products and devices, and new technologies.

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The performance of dental restorations has been a concern of dentists and engineers. One of the topics that have concentrated most effort has been the study of the properties of the interface between the veneering porcelain to metallic or ceramic substrates, namely on the improvement of the adhesion between the two materials and its behaviour under oral conditions. This paper discusses the benefits of placing a composite interlayer (50% metal + 50% ceramic, vol.%) at interface between metal and ceramic in a dental restoration. The discussion covers the following aspects: performance of this system under thermomechanical fatigue conditions, thermal and mechanical properties of the composite interlayer, thermal residual stresses arising after porcelain sintering and technical feasibility on a prosthetic laboratory.

Keywords:

Metal-ceramic restoration

composite

mechanical properties

thermal properties

thermal residual stresses

thermal cycling

bond strength.

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