Cytokine secretion, apoptosis and production of active oxygen forms in cell cultures for their in vitro contact with implants carrying microarc, magnetron or ablation calcium-phosphate coatings have been studied in the work. Mononuclear blood leukocytes have been established to be first of all cells regulating the acceptance/rejection of implants with different roughness. Implants with “smooth” calcium-phosphate coatings are less suitable for bone tissue reparative regeneration.