Abstract: Objective To investigate the apatite forming ability of pure titanium implant after micro-arc oxidation treatment in
simulated body fluid (SBF) and obtain implants with calcium phosphate (Ca-P) layers. Methods The implants were immersed
in (SBF) after micro-arc oxidation treatment for different time lengths, and their apatite forming ability and the morphology
and constituents of the Ca-P layers formed on the sample surface were analyzed using X-ray diffraction, scanning electron
microscopy, X-ray photoelectron spectroscopy, and energy dispersive electron probe. Results After immersion in SBF, large
quantities of Ca-P layers were induced on the surface of the samples. The Ca-P layers were composed of octacalcium
phosphate and carbonated hydroxyapatite, and the crystals showed a plate-like morphology with an oriented growth.
Conclusion The implants with micro-arc oxidation treatment show good apatite forming ability on the surface with rich
calcium and phosphorus elements. The formed layers are composed of bone-like apatite including octacalcium phosphate and
carbonated hydroxyapatite.