Push-out strength of hydroxyapatite coated by sputtering technique in bone.
Hydroxyapatite was coated with 1 microm thickness on titanium columns of a length of 10 mm, an outer diameter of 4.0 mm by radio frequency magnetron sputtering. The hydroxyapatite coating titanium columns were implanted in the diaphysis of femora of 3 adult dogs, and push-out test was carried out after 2, 4 and 12 weeks of implantation using a testing machine. The interface of bone/column was observed histologically after the test. At 12 weeks the push-out strengths of coating and non-coating columns were 3.5 and 1 MPa, respectively. Histological observation indicated a formation of thin connective tissue with 5-30 microm thickness at the interface of the bone/column. No inflammation was observed during the implantation periods.
Department of Electronic and Computer Engineering, Tokyo Denki University, Hiki, Saitama, Japan. ozeki@bme.f.dendai.ac.jp
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K
Ozeki
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T
Yuhta
H
H
Aoki
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I
Nishimura
Y
Y
Fukui
D000818:Animals; D020099:Coated Materials, Biocompatible / Q000737:chemistry* / Q000592:standards*; D004195:Disease Models, Animal; D004285:Dogs; D017886:Durapatite / Q000737:chemistry* / Q000592:standards*; D019544:Equipment Failure Analysis; D005269:Femur / Q000601:surgery*; D006622:Hip Prosthesis / Q000592:standards*; D008422:Materials Testing; D016348:Osseointegration; D011475:Prosthesis Failure; D013499:Surface Properties; D013718:Tensile Strength; D013997:Time Factors; D014025:Titanium
D020099:Coated Materials, Biocompatible; D017886:Durapatite; D014025:Titanium