Skip to main content

Nano-Sized Hydroxyapatite Coatings on Ti Substrate with TiO2 Buffer Layer by E-beam Deposition

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract:

A nano-sized hydroxyapatite (HA) layer was coated on a Ti substrate with a titanium oxide (TiO2) buffer layer by the electron-beam deposition method. The morphological features as well as the mechanical and biological properties of the HA/TiO2-layered coating were noticeably different from those of a conventional HA coating on Ti. The HA on the TiO2 layer replicated the fine grain structure of the TiO2 layer, with grain sizes of just a few tens of nanometers. The TiO2 buffer layer was highly effective in preserving the adhesion strength of the coating layer following the heat treatment at 500°C, which was necessary to crystallize the structure. Moreover, in contrast to the HA single coating wherein severe cracking was observed under moist conditions, the HA/TiO2 coating retained its mechanical stability under the same conditions. The dissolution of the HA/TiO2 coating in a physiological saline solution exhibited a more favorable pattern than that of the HA single coating, with a reduced initial burst and a subsequent steady release rate. Preliminary in vitro cellular tests showed that osteoblastic cells expressed a significantly higher alkaline phosphatase level on the HA/TiO2 coating than on the HA single coating. Conclusively, the nano-sized HA coating with the TiO2 buffer layer holds great promise as a bioactive coating system.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2006.01351.x

Affiliations: 1: School of Materials Science and Engineering, Seoul National University, Seoul, Korea 2: Department of Dental Biomaterials, School of Dentistry, Dankook University, Cheonan, Korea

Publication date: January 1, 2007

bsc/jace/2007/00000090/00000001/art00007
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more