Development of Biocompatible Y-Stabilized ZrO₂ Fabricated by Spark Plasma Sintering

Abstract:

Due to the merits of zirconia ceramics such as high strength, toughness, abrasion resistance, and chemical stability in vivo, yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) are currently used in the femoral head of hip prostheses. However, this material has a limited applications range because it is a bioinert material that does not interact with bone tissue and thus does not easily integrate directly in the bone. Therefore, we need to add different material’s layer which enables in vivo formation of bone-like apatite layer that exhibits bioactivity , composite compound bioactive ceramics, and facilitates interactions and integration in bone tissue. In addition, by developing a surface structure that enhances mechanical bonding, this material can be expected to be used as an alternative aggregate under load bearing conditions. In the present study, various method were carried out with the objective of controlling interactions between zirconia ceramics and the body such as structural design of the material surface, addition of bioactivity using reagents treatment, confirmation of formation of the apatite layer using immersion in simulated body fluid, wettability testing and develop structure with mechanical properties equal to bone strength.

• Periodical: Advances in Science and Technology (Volume 86)
• Pages: 17-21
• DOI: https://doi.org/10.4028/www.scientific.net/AST.86.17
• Online since: September 2012
• Authors: H. Sakai, Teruo Asaoka
• Keywords: Biomaterial, Spark Plasma Sintering (SPS), Surface Morfology, Zirconia

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