Calcium Aluminate Bioceramics
Ceramic materials with high strength, high wear resistance, and high resistance to corrosion can be used as prosthetic replacements for bones and teeth. One important consideration for potential bioceramics is compatibility with the human body, since for example hip prostheses are placed in vivo. Bones and teeth comprise hydroxyapatite, a calcium bearing phase and Ca2+ ions are mobile during formation. Calcium aluminates are attractive for bioceramic applications; because of the mobility of Ca2+ in biological fluids these cements can bond to bone and are quick setting and during hardening form enough hydrates to fill the initial porosity and result in a high strength end-product. In addition, for dental applications CAC have similar thermal properties to teeth and are translucent, therefore even on the basis of aesthetic appearance are useful as a dental restorative [5-8, 30, 31].