Porous plasma-sprayed Titanium coating
The CCI Evolution contains a Titanium Plasma Spray (TPS) coating bonded to the tibia and talar implant. The TPS surface promotes osseointegration and bone growth.
The pore sizes with TPS allows for good ingrowth of mineralised bone into the implant surface structure.
The TPS coating complies with FDA guidelines for plasma sprayed coatings on orthopaedic implants. The titanium coating powder is Grade 4 pure Titanium in accordance with ISO 5832-2. The Titanium alloy is in accordance with ISO 5832-3.
Calcium phosphate Bonit coating
A Calcium phosphate (CaP) is applied on top of the TPS. Bioactive coatings on implant surfaces only need to last as long as it takes for implant osseointegration to be completed.
The Bonit CaP coating is a thin (approximately 20 microns) coating with an even and complete coverage on the TPS structured surface.
The Bonit phase composition consists of a more soluble phase (brushite) and an inner phase (microcrystalline hydroxyapatite).
The CaP coating is completely resorbed in a controlled way (approximately 6 to 12 weeks) and it is simultaneously replaced by bone.
Dual coating
The dual coating of TPS and CaP provides an optimal environment for osseointegration, allowing for a reliable fixation. The reliable fixation of these coatings with Total Ankle Replacement has been described (Wood & Deakin, 2003).
Titanium Nitride ceramic coating
A Titanium Nitride (TiN) ceramic is coated on the articulating surface of the CCI Evolution. The ultra-hard TiN layer forms a supremely smooth surface and covers any protruding metal block carbides, preventing scratching of the opposite polyethylene articulating surface.
The TiN ceramic enhances the wear characteristics and reduces metal ion release from implant components in case of proven metal hypersensitivity.
