Push‐out strength of hydroxyapatite coated by sputtering technique in bone

Article type: Research Article

Authors: Ozeki, K.^; | Yuhta, T.^; | Aoki, H. | Nishimura, I. | Fukui, Y.

Affiliations: Department of Electronic and Computer Engineering, Tokyo Denki University, Ishizaka, Hatoyama, Hiki, Saitama, 350‐0394, Japan | Tokyo Bioceramics Institute Co. Ltd., Kyodo Bldg, 1‐9‐12, Nihonbashi Muromachi, Chuo‐Ku, Tokyo, 103‐0022, Japan | Department of Biomedical Engineering, Hokkaido University, Kita‐13 Nishi‐8, Kita‐ku, Sapporo, 060‐8628, Japan

Note: [] Corresponding author. Tel.: +81 492 96 2911(3155); Fax: +81 492 96 6413; E‐mail: ozeki@bme.f.dendai.ac.jp.

Note: [] Corresponding author. Tel.: +81 492 96 2911(3155); Fax: +81 492 96 6413.

Abstract: Hydroxyapatite was coated with 1 μm 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 μm thickness at the interface of the bone/column. No inflammation was observed during the implantation periods.

Keywords: Hydroxyapatite, sputtering, coating, push‐out testing

Journal: Bio-Medical Materials and Engineering, vol. 11, no. 1, pp. 63-68, 2001