Porous Type Of Ceramic Used In Bones

Calcium phosphate based ceramics constitute at present the preferred bone substitute material in orthopaedic and maxillofacial applications as they are similar to the main mineral phase of bone in structure and chemical composition.

Porous type of ceramic used in bones. Three different porous ceramics calcium aluminate calcium hydroxyapatite and tricalcium phosphate with. Different pore sizes porosities and strengths are available. Ceramic foam is an important part of porous ceramics and the open cell type of ceramic foam which is a new type of highly porous ceramics has a three dimensional reticulated structure with connective pores resulting in great specific surface area high fluid contact efficiency and a small loss of fluid pressure 26 27. Both types of ceramic materials fulfilled the microstructural requirements for bioapplications.

Such synthetic bone substitute or scaffold materials are typically porous which provides an increased surface. Porous ceramics were prepared in two ways namely as air sintered silicon nitride and sintered reaction bonded silicon nitride. The ceramics are available as dense or porous types and the shape types are granular or block like. This present study was done to find a suitable biodegradable porous ceramic for human bone replacement.

First an overview of ceramics used in biomedical applications as well as those formed in living beings. Accordingly a review of the principal types of porous materials organics ceramics metals metallorganics and organoapatites and composites used in bone engineering will be provided. Porous ceramics have grown in importance in the industry recently because of their many applications like filters absorbers dust collectors thermal insulation hot gas collectors dielectric resonators bioreactors bone replacement and automobile engine components 1 2 3 4 generally porous ceramics have good properties such as mechanical strength abrasion resistance chemical and. The crystalline phase of natural bone is basically ha and ha ceramics have been used extensively as a substitute in bone grafts.