The mechanical properties of titanium and its alpha-beta alloys make them ideal implant materials. Hydroxyapatite coating substantially contributes to the improvement of these implants. This survey presents certain patterns of the combined use of hydroxyapatite with titanium and titanium alloys in dental and orthopaedic implantology. It demonstrates the advances of research on hydroxyapatite and its crystal line nanoparticles and reveals the advantages of and benefits from these coatings for further quality improvement of titanium implants.
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