Fabrication of novel apatite coating implant based on new concept

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Aim of this study is to fabricate hydroxyapatite(HAp) coating titanium(Ti) which shows high adhesivestrength between HAp coating and Ti substrate and chemically stable with time after implantation whencompared to HAp coating prepared by plasma spraying method. Zinc phosphate coating was successfullyprepared on Ti implant using our original method employing industrial zinc phosphate coating mixed withhydrothermal treatment. Subsequently the zinc phosphate could transform to HAp by treating withappropriate calcium salt solution. Adhesive strength between obtained coating and Ti substrate was 36.7 ±17 MPa which was approximately 4 times compared to that obtained by plasma spraying method. In vitroosteoconductivity evaluated using rat bone marrow cells indicated that cell attachment, proliferation,differentiation and calcification for HAp coating were significantly higher than that for non-treated Ti. Itis concluded that novel treatment proposed in this study would be useful for ostconductive treatment ofTi implant.