Ce-TZP/Al2O3 Nanocomposites for Biomedical Implants

Abstract

Ceramic materials are widely used for biomedical applications because of their remarkable biological and mechanical properties. Titanium and titanium alloys are widely used for fabrication of dental implants. The foremost disadvantage of titanium is its dark greyish colour, negative delicate tissue states of the gingiva may prompt to compromised aesthetics. Anyway these days Zirconia implants were brought into dental implantology as an option in contrast to titanium implants. Zirconia seems to be an appropriate implant material because of its tooth like shading, mechanical properties, biocompatibility, and low plaque partiality. Initially Yittria-partially stabilized zirconia (Y-TZP) were used, low temperature degradation (LTD) is started from confined surface grains between which water is fused into the zirconia grid through disintegration of Zr-O-Zr bonds and filling of oxygen opportunities may result in a significant decrease in the quality and toughness of Y-TZP. The present work is conducted on ceria partially stabilized zirconia/alumina Nanocomposite (Ce-TZP/Al₂O₃) for dental implants. Ce-TZP/Al₂O₃ shows good hardness and wear characteristics. Different samples were prepared by varying compositions of ceria, zirconia and alumina which show good hardness and wear rate by conducting microhardness and wear tests.