Abstract
Plasma off-angle spraying was used to design an additive technology for the preparation of three-dimensional capillary porous titanium (3D CP Ti) coatings with a new type of porous structure consisting of ridges and cavities. The high shear strength of titanium coatings, equalling 68 MPa, is determined by the coating structure, which assures the use of three arc discharges between the anode and cathode, cathode and wire, and cathode and substrate. Additional HA and HA-CaP coatings provide bioactive properties to the 3D CP Ti coatings. The HA and HA-CaP coatings were prepared by micro plasma oxidation (MPO). The 3D CP Ti-HA coating assures a more active osseointegration compared to that with the 3D CP Ti coating and determines the high shear strength (9.8±1.54 MPa) at the initial stage of osseointegration. The 3D CP Ti-HA-CaP-coated titanium implants demonstrate the steady increase in the osseous tissue density and a shear strength of 6.2±0.60 MPa reached after 48 weeks of implantation.
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