Nano-hardness and Elasticity for Hydroxyapatite Before and After of Immersing it into Simulated Body Fluid

Stoichiometric and anisotropic nanometer hydroxyapatite was made with co-precipitated method. The powder was compacted under uniaxial and isostatic press and lately sintered. Finally, the tablets were immersing in simulated body fluid during 1 day. The material loss hardness (68.20%), elasticity (64.93%) and plastic work (9.20%) only increasing elasticity work (30.06%).