Mechanical properties of alumina-zirconia composites for ceramic abutments

Materials Research

Maria Cecilia Corrêa De Sá E Benevides De Moraes²  Carlos Nelson Elias²  Jamil Duailibi Filho¹  Leandra Guimarães De Oliveira¹ 

[1] ,Instituto Militar de Engenharia Departament of Mechanical and Metallurgical Engineering Rio de Janeiro RJ ,Brazil

关键词: ceramic abutments;    alumina-zirconia composites;    bioceramics and mechanical properties;   

DOI  :  10.1590/S1516-14392004000400021

来源: SciELO

【 摘 要 】

The need for new materials to substitute injured or damaged parts of the human body has led scientists of different areas to investigate bioceramics since the 70's, when other materials in use started to show rejection problems. Ceramics show some advantages like being the material that best mimics the bone tissue, although present low toughness when compared with the metallic materials. As patients have become more and more demanding regarding esthetic and biocompatibility aspects of their dental restorations, ceramic material has become a main object of scientific interest especially from the material point of view. The alumina-zirconia composites are one of the relatively good and promising candidate for biomaterials application, due to biocompatibility and their mechanical properties that combines high flexural strength with a high toughness. The aim of the present work is to analyze the mechanical properties of these composites, where Y-TZP zirconia content was varied from 5 to 80 wt.% These systems can achieve a flexural strength 93 % and fracture toughness 29 % superior when compared to the pure alumina ceramics. These results showed that ceramic abutments components can be prepared for prosthetic rehabilitations with dental implants.

【 授权许可】

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