Abstract
Ostrich eggshells are a potentially abundant and a high purity and low cost source of calcium to produce β-Tricalcium Phosphate (β-TCP) and Hydroxyapatite (HA), important calcium phosphates used as biomaterials. Here, we use a wet precipitation procedure to synthesize these phosphates using ostrich eggshells as a source of calcium ions. The biphasic precipitated powder, calcined at 800oC, is a mixture of both Hydroxyapatite and β-Tricalcium Phosphate, also known as the biomaterial Biphasic Calcium Phosphate (BCP). Physico-chemical properties of the final powder product show water and CO32- groups absorbed in the particles surface, 0.1 to 100 µm particles size distribution and 11.70 m2/g of specific surface area.
Highlights
Biomaterials are synthetic or natural materials used as replacement parts of a biologic system to play a certain role in contact with a living tissue
Dense hydroxyapatite is an example of a bioactive material while Biphasic Calcium Phosphate porous scaffolds are bioresorbable materials
The ostrich eggshells were crushed manually, milled for 30 minutes and its composition was determined by XRD (Figure 1a)
Summary
Biomaterials are synthetic or natural materials used as replacement parts of a biologic system to play a certain role in contact with a living tissue. Calcium phosphates are important bioactive and bioresorbable biomaterials. A bioactive material will slowly dissolve when in contact with a living tissue, forming a layer of biological apatite before reaching the bone, and forming a direct bond to the bone. A reabsorbable material instead will dissolve and allow that a new tissue grows inside its irregularities cavities, not necessarily interacting with the bone. Dense hydroxyapatite is an example of a bioactive material while Biphasic Calcium Phosphate (a mixture of HA and β-TCP) porous scaffolds are bioresorbable materials. That is the reason why these two phosphates are the most used biomaterial in the medical field[1]
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