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Nano-Hydroxyapatite Coated Femoral Stem Implant by Electrophoretic Deposition

Published online by Cambridge University Press:  26 February 2011

Heng Zhang ,
Jay Krajewski ,
Zongtao Zhang ,
Mark Masopust  and
Danny T. Xiao
Heng Zhang
Affiliation:
hzhang@inframat.com, Inframat Corporation, Inframat Corporation, 74 Batterson Park Road, Famington, CT, 06032-2597, United States, 860-487-3838, 860-429-5911
Jay Krajewski
Affiliation:
jkrajewski@inframat.com, Inframat Corporation, 74 Batterson Road, Farmington, CT, 06032-2597, United States
Zongtao Zhang
Affiliation:
Zongtao.Zhang@stryker.com, Inframat Corporation, 74 Batterson Road, Farmington, CT, 06032-2597, United States
Mark Masopust
Affiliation:
mmasopust@inframat.com, Inframat Corporation, 74 Batterson Road, Farmington, CT, 06032-2597, United States
Danny T. Xiao
Affiliation:
dxiao@inframat.com, Inframat Corporation, 74 Batterson Road, Farmington, CT, 06032-2597, United States
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Abstract

A nanostructural hydroxyapatite (HA) coating was deposited to a porous Ti6Al4V femoral stem implant using electrophoretic deposition (EPD) to improve the bond strength, healing speed, and durable service life. The nanostructure of HA and micro-pores created in the coating can enhance the bioactivity and increase the adhesion between the implant and hard tissue. In order to achieve homogenous HA coating on the stem implant with a porous surface profile, a compensation electrode was designed and prepared. Rotation of the implant was conducted during the coating process so that a uniform coating could be achieved. The EPD combined with a dip coating was used to compensate for the complex profile and led to a homogenous coating throughout both peak and valley areas.

This developed coating process is able to deposit homogeneous HA coating on a complicated implant surface. Compared to the coating made by plasma thermal spray, the EPD HA coating can cover inner cores and exhibit a better adhesion and bioactivity. The EPD HA coating possesses significantly improved corrosion resistance compared to thermal spray HA coating. Most importantly, the biomechanical property was significantly promoted based on an in vivo animal test.

Keywords

biomedicalcoatingnanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 975: Symposium DD – Mechanics of Biological and Bio-Inspired Materials , 2006 , 0975-DD06-05
Copyright
Copyright © Materials Research Society 2007

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References

REFERENCES

[1]. Ducheyne, P., Radin, S., Heughebaert, M., and Heughebaert, J.C., “Calcium phosphate ceramic coating on porous Ti: effect of structure & composition on electrophoretic deposition, vacuum sintering, and in vitro dissolution,” Biomaterials, 11, 244–54, (1990).Google Scholar
[2]. Gal-Or, L., and Zhitomirsky, I., “Electrophoretic deposition of hydroxyapatite,” J. Mater. Sci. in Med., 8, 213–219, (1997).Google Scholar
[3]. Wei, M., Ruys, A.J., Milthorpe, B.K., Sorrell, C.C., and Evans, J.H., “Electrophoretic deposition of hydroxyapatite coatings on metallic substrate: a nanoparticle dual-coating approach,” J. Sol-gel Sci. –48, (2001).Google Scholar
[4]. Zongtao, Zhang and Tongsan D., Xiao, “Multi-layer coating useful for the coating of implants.” U.S. Pat. Appl. Publ. US 2003099762 A1 20030529, (2003).Google Scholar
[5]. Zhang, Z.Z. and Xiao, T.D., “Nanostructured biocoatings for the next generation of artificial bone implant applications.” Fine, Ultrafine and Nano Powders 2001, Chicago, Oct 17-20, (2001).Google Scholar
[6]. Zhang, Z.Z., Dunn, M.F., Xiao, T.D., Tomsia, A.P., and Saiz, E., “Nanostructured hydroxyapatite coatings for improved adhesion and corrosion resistance for medical implants.” Mater. Res. Soc. Symp. Proceed., Nanophase and Nanocomp. Mater. IV, 703, 291–296, (2002).Google Scholar
[7]. Zhang, Z.Z., Dunn, M.F., and Xiao, T.D., “Nanostructured HA coatings for long-term viability,” (Society for Biomaterials 27th Annual Meeting, Tampa, Florida, 2002).Google Scholar
[8]. Zhang, H., Krajewski, J., Zhang, Z., Xiao, T.D., and Reisner, D., “Nano-hydroxyapatite coated acetabular cup implant by electrophoretic deposition”, (NSTI 2006 conf., Boston, May 2006).Google Scholar