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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:
[email protected], Inframat Corporation, Inframat Corporation, 74 Batterson Park Road, Famington, CT, 06032-2597, United States, 860-487-3838, 860-429-5911
Jay Krajewski
Affiliation:
[email protected], Inframat Corporation, 74 Batterson Road, Farmington, CT, 06032-2597, United States
Zongtao Zhang
Affiliation:
[email protected], Inframat Corporation, 74 Batterson Road, Farmington, CT, 06032-2597, United States
Mark Masopust
Affiliation:
[email protected], Inframat Corporation, 74 Batterson Road, Farmington, CT, 06032-2597, United States
Danny T. Xiao
Affiliation:
[email protected], 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

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