Hydroxyapatite [HA; Ca10(PO4)6(OH)2] which composes inorganic phase of bones and teeth is one of the
biomedical materials for artificial bone, reconstruction of broken or disordered bones, coating of metallic biomedical
materials and dental surgery with its great biocompatibility. In this study, HA powders were synthesized from
aqueous suspensions containing H3PO4 and Ca(OH)2 with 1.67 Ca/P ratios (chemical HA, CHA) and second
process is carried out in simulated body fluids consisting of (NH4)2HPO4 and Ca(NO3)24H2O as biomimetic
hydroxyapatite (BHA). Moreover, properties of bovine HA (BoHA) and commercial HA (CoHA) were compared
with properties of synthesized HA powders. Chemical structures of synthesized powders have been examined by
the Fourier transform infrared technique and X-ray diffraction. The results showed that BHA powders have a pure
HA content and no secondary phase, CHA also has monetite phase as secondary phase with HA in its structure.
Particle size analysis was carried out with laser particle sizer and zeta-sizer, surface area of powders has been
analyzed by the Brunauer–Emmett–Teller technique. Powder morphology is determined using scanning electron
microscopy. As a result two different synthesis methods affected properties of HA powders.