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Effect of Aging on Microstructure and Mechanical Properties of Some Dental Materials

El-Bediwi AB, Ebrahim RH, and Sarhan A

Effect of aging in saliva on microstructure, molecular structure, hardness and surface roughness of Filtek, glass ionomer, porcelain and zirconia dental materials have been evaluated. From X-ray and scanning electron microscope analysis microstructure of Filtek, glass ionomer, porcelain and zirconia dental materials changed after aging in saliva for one month. Vickers hardness of Filtek and glass ionomer increased but surface roughness decreased after aging in saliva for one month. Vickers hardness of porcelain and zirconia decreased but surface roughness increased after aging in saliva for one month. These results indicated that, there is a significant effect of saliva on microstructural and mechanical strength of used dental materials.