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Bone tissue engineering on amorphous carbonated apatite and crystalline octacalcium phosphate-coated titanium discs.

Abstract：

:Poor fixation of bone replacement implants, e.g. the artificial hip, in implantation sites with inferior bone quality and quantity may be overcome by the use of implants coated with a cultured living bone equivalent. In this study, we tested, respectively, amorphous carbonated apatite (CA)- and crystalline octacalcium phosphate (OCP)-coated discs for their use in bone tissue engineering. Subcultured rat bone marrow cells were seeded on the substrates and after 7 days of culture, the implants were subcutaneously implanted in nude mice for 4 weeks. After 7 days of culture, the cells had formed a continuous multi-layer that covered the entire surface of the substrates. The amount of cells was visually higher on the crystalline OCP-coated discs compared to the amorphous CA-coated discs. Furthermore, the amorphous CA-coated discs exhibited a visually higher amount of mineralized extracellular matrix compared to the crystalline OCP-coated discs. After 4 weeks of implantation, clear de novo bone formation was observed on all discs with cultured cells. The newly formed bone on the crystalline OCP-coated discs was more organized and revealed a significantly higher volume compared to the amorphous CA-coated discs. The percentage of bone contact with the discs was also significantly higher on the OCP-coated discs. Overall, the results suggest that a crystalline OCP coating is more suitable for bone tissue engineering than an amorphous CA coating.

journal_name

Biomaterials

journal_title

Biomaterials

authors

Dekker RJ,de Bruijn JD,Stigter M,Barrere F,Layrolle P,van Blitterswijk CA

doi

10.1016/j.biomaterials.2005.01.057

keywords:

subject

Has Abstract

pub_date

2005-09-01 00:00:00

pages

5231-9

issue

25

eissn

0142-9612

issn

1878-5905

pii

S0142-9612(05)00107-9

journal_volume

26

pub_type

杂志文章

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