The Journal of Bone and Joint Surgery (American). 2004;86:123-129
© 2004 The Journal of Bone and Joint Surgery, Inc.
Clinical Validation of a Structural Porous Tantalum Biomaterial for Adult Reconstruction
J. Dennis Bobyn, PhD,
R.A. Poggie, PhD,
J.J. Krygier, CET,
D.G. Lewallen, MD,
A.D. Hanssen, MD,
R.J. Lewis, MD,
A.S. Unger, MD,
T.J. O'Keefe, MD,
M.J. Christie, MD,
S. Nasser, MD,
J.E. Wood, MD,
S.D. Stulberg, MD and
M. Tanzer, MD
Corresponding author:
J. Dennis Bobyn, PhD
Jo Miller Orthopaedic
Research Laboratory, Montreal General Hospital,
1650 Cedar Avenue, Room
LS1-409, Montreal, Quebec, H3G 1A4 Canada.
E-mail address:
john.bobyn@mcgill.ca
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Introduction
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Various porous coatings—most notably, those manufactured by the
sintering of cobalt-chrome or titanium beads and the diffusion bonding of
titanium fiber wires—have been utilized for the biologic attachment of
orthopaedic implants during the past three
decades1. About ten
years ago, a novel porous biomaterial made from commercially pure
tantalum2-5
with a unique set of physical and mechanical properties was developed.
Compared with conventional porous coatings, this material possesses higher
volume porosity, more freely communicating pores, a higher coefficient of
friction against bone, and a lower bulk stiffness
(Fig. 1). In addition, the
material is structural in that it has sufficient strength to enable the
manufacture of implants without the need for a supportive solid metal
substrate.
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Fig. 1 Top, Scanning electron micrograph illustrating the
three-dimensional, open-pored structure of the porous tantalum biomaterial.
The inset highlights the slight microtexture on the tantalum struts that
results from the manufacturing process. Bottom, . . . [Full Text of this Article] |
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