1. Introduction -- 2. Plasma spraying and other related coating techniques -- 3. Hydroxyapatite coating and its application -- 4. Structural and chemical properties of hydroxyapatite coating -- 5. In vitro studies of hydroxyapatite coatings -- 6. Macromechanical properties of hydroxyapatite coating -- 7. Micro/nanomechanical properties of hydroxyapatite coating -- 8. Tribological properties of hydroxyapatite coatings -- 9. Residual stress of hydroxyapatite coating -- 10. In vivo studies of microplasma sprayed hydroxyapatite coating -- 11. Future scope and possibilities -- 12. Conclusions.