alexa Abstract | Zirconia Effect on the Bioactivity and the Mechanical Properties of Calcium Magnesium Silicate Ceramics at (CaO+MgO)/SiO2 Molar Ratio Close to Unity

Bioceramics Development and Applications
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Research Article Open Access


New ceramic composites from calcia-magnesia-silica system at a molar ratio of (CaO-MgO)/SiO2 closes to the unity and the addition of different amounts of zirconia (5 wt %, 15 wt % and 25 wt %) have been investigated. These systems powders were formed and fired at 1310 ± 20°C for 2 hr. Phase composition, microstructure, physical and mechanical properties of these composites were determined. The in-vitro bioactivities of these sintered composites were investigated by analysis of their ability for the formation of hydroxyapatite (HA) using SEM-EDS after their soaking in the simulated body fluid (SBF) for 7 days. The findings indicated that beginning of HA formation on the surface of all investigated composites. However, the composite containing 5 wt % ZrO2 gave clear tendency toward the formation-ability of HA typical to cauliflower morphology. The mechanical properties of the promised bioactive composite in term of Vickers hardness and fracture toughness were ~3 Gpa and ~2 Mpa. m1/2, respectively. The ceramic composite containing 5 wt % ZrO2 might be nominated to be implanted material because their property is quite similar to the properties of human cortical bone.

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Author(s): Amira MM Amin, Emad MM Ewais, Yasser MZ Ahmed, Eman A Ashor, Ulrike Hess and Kurosch Rezwan


Bioactivity, Calcia, Magnesia, Zirconia, SBF, Microstructure, Vickers hardness, Fracture toughness, Bio Ceramics, Bio inert Materials, Biopolymers, Calcium Phosphate, Ceramic Engineering, Ceramic Metal Oxides, Ceramics, Implants Biology, Endodontics, Material Science, Medicine, Prosthetic Devices, Tissue Scaffold, Injectable bone substitute material, Human osteoblasts, Hydroxyapatite, Bone

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