MACHINABLE TRICALCIUM PHOSPHATE -LANTHANUM PHOSPHATE BIOCERAMIC COMPOSITE FOR BIOMEDICAL APPLICATION.

摘要

The present invention discloses a synergistic composition for the development of machinable beta tricalcium phosphate (β-TCP) - lanthanum phosphate (LP) sintered composite having high strength, alongwith machinability or drillability character and high bioactivity and biocompatibility properties. Such bioceramics composites were prepared by using synthesized (β-TCP and LP powders using LP below 50 wt% and sintering them above 1200°C. The present invention relates to the development of such a machinable bioceramic implant wherein the machinability property is introduced in β-TCP matrix by incorporation of a weak interphase material (LP). The composites maintained its composite nature even after sintering at 1250°C. The sintered composites have significant density, strength, bioactivity, biocompatible character and drillability even with conventional solid carbide drill bits. The implants are important for various biomedical applications, especially for orthopedic, maxillofacial, spine surgery and dentistry.