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The modern coatings used in arthroplasty for long term implants are reviewed. The phosphate coatings are the most popular technique to improve the bone-implant interfacial strength and promote the osseointegration. The plasma spraying, electrophoretic precipitation, powder metallurgy, ion beam sputtering, high velocity oxy-fuel (HVOF) combustion spraying, sol-gel technique, biomimetic deposition are mostly used to obtain the phosphate, usually hydroxyapatite coatings.
The composite coatings based on HA are proposed to improve biochemical and mechanical properties. The Ti, Ti alloys, titania, zirconia, zinc particles and glasses are suggested to strengthen the HA matrix, and some organic compounds and polymers to improve the biochemical behaviour.
Among another coatings, titania, zirconia, aluminia, carbon and organic, glass - ceramics and titania - silicate coatings are mostly proposed.
.J.: Degradation of a TBC with HVOF-CoNiCrAlY bond coat. Journal of Thermal Spray Technology, Vol. 23, No. 5, 2014. 5. Jalowiecka A., Naumenko D., Ernsberger M., Herzog R., Quadakkers W.J.: Alumina formation and microstructural changes of aluminized CoNiCrAlY coating during high temperature exposure in the temperature range 925°C–1075°C. Materials at High Temperatures, Vol. 35, Issue 1-3, 2018. 6. Kumar D., Pandey K.N., Das D.K.: Thermal cyclic resistance behavior of Inconel 800 super alloy substrate with thermal barrier coatings by plasma spraying, Material Today Proceedings