ABSTRACT
<p><b>OBJECTIVE</b>To investigate calcium-phosphate coating on commercial pure titanium substrate using a fast biomimetic procedure.</p><p><b>METHODS</b>The titanium specimens were divided into two groups, group A and group B. The specimens of group A were only treated with the mixture of H2SO4/HCl for 30 min. The specimens of group B were treated with the mixture of H2SO4/HCl for 30 min, immersed into 5 mol/L NaOH solution at 60 degrees C for 24 h, and then heated to 600 degrees C and maintained for 1 h. All specimens were soaked into simulated body fluid-A (SBF) and SBF-B for each day. The surface morphology was observed by field scanning electron microscopy.</p><p><b>RESULTS</b>Dense calcium-phosphate coating deposited on all the titanium surfaces of two groups. The calcium-phosphate coating consisted of spheric structure with a diameter of 1 approximately 3 microm, which was proved to be hydroxycarbonate apatite with the analysis of X-ray diffraction.</p><p><b>CONCLUSIONS</b>Thin hydroxycarbonate apatite coating can deposited on pure titanium using a fast biomimetic procedure.</p>