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Effect of surface roughness of Ti, Zr, and TiZr on apatite precipitation from simulated body fluid
Author(s) -
Chen Xiaobo,
Nouri Alireza,
Li Yuncang,
Lin Jianguo,
Hodgson Peter D.,
Wen Cui'e
Publication year - 2008
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.21900
Subject(s) - simulated body fluid , apatite , materials science , zirconium , biocompatibility , titanium , titanium alloy , surface roughness , alloy , precipitation , metallurgy , chemical engineering , metal , surface finish , surface modification , coating , composite material , physics , meteorology , engineering
Some of the critical properties for a successful orthopedic or dental implant material are its biocompatibility and bioactivity. Pure titanium (Ti) and zirconium (Zr) are widely accepted as biocompatible metals, due to their non‐toxicity. While the bioactivity of Ti and some Ti alloys has been extensively investigated, there is still insufficient data for Zr and titanium–zirconium (TiZr) alloys. In the present study, the bioactivity, that is, the apatite forming ability on the alkali and heat treated surfaces of Ti, Zr, and TiZr alloy in simulated body fluid (SBF), was studied. In particular, the effect of the surface roughness characteristics on the bioactivity was evaluated for the first time. The results indicate that the pretreated Ti, Zr and TiZr alloy could form apatite coating on their surfaces. It should be noted that the surface roughness also critically affected the bioactivity of these pretreated metallic samples. A surface morphology with an average roughness of approximately 0.6 µm led to the fastest apatite formation on the metal surfaces. This apatite layer on the metal surface is expected to bond to the surrounding bones directly after implantation. Biotechnol. Bioeng. 2008;101: 378–387. © 2008 Wiley Periodicals, Inc.