Surface properties and bio-acceptability of Ti sub 2O sub 3 surfaces

TiO sub 2 has been identified as a major and probably most desired surface for high bio-acceptability. South African manufactured implant surfaces revealed that Ti sub 2O sub 3 is the predominant surface layer. Chemical surface characteristics after evaluation of Ti sub 2O sub 3 surfaces using x-ray...

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Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 1997-07, Vol.243 (1-2), p.221-230
Main Author: Botha, S J
Format: Article
Language:English
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Summary:TiO sub 2 has been identified as a major and probably most desired surface for high bio-acceptability. South African manufactured implant surfaces revealed that Ti sub 2O sub 3 is the predominant surface layer. Chemical surface characteristics after evaluation of Ti sub 2O sub 3 surfaces using x-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) showed surfaces to be relatively free from contamination by unwanted chemical elements. Surface layers of different Ti-core metals consisted mainly of Ti, O and C. XPS analysis of surface oxide layers on all Ti-surfaces showed mainly Ti sub 2O sub 3 and TiO in smaller quantities. When evaluating in vitro bio-acceptability, percentage attachment efficiency and proliferation (%-AEP) of human fetal fibroblasts (HFF) and human gingival fibroblast (HGF) on Ti-surfaces showed that the Ti sub 2O sub 3-surface oxide furnished a highly bio-acceptable surface. Evaluation of attached HGF on Ti-surfaces using scanning electron microscopy (SEM) showed fibroblasts attached and spread on Ti-surfaces by formation of numerous filopodia. Metal leaching as determined using inductively coupled plasma emission spectroscopy (ICP) were practically absent for all Ti sub 2O sub 3-surfaces. Absence of toxic metals (V,Pd) on surfaces prepared from Ti-6Al-4V-alloy and Ti with Pd impurity, and practical absence of metal leaching, indicated that these metals did not compete for oxidation of the surface and indicated a possible masking effect of the metal surface by the Ti sub 2O sub 3-surface oxide layer. Implants with Ti sub 2O sub 3-surfaces are widely used in South Africa and have proved to be very successful.
ISSN:0921-5093