Title: In vitro corrosion resistance of porous NiTi intervertebral fusion devices
Authors: Schrooten, Jan ×
Assad, Michel
Van Humbeeck, Jan
Leroux, Michel A #
Issue Date: Feb-2007
Publisher: Iop publishing ltd
Series Title: Smart materials & structures vol:16 issue:1 pages:S145-S154
Abstract: Porous titanium-nickel (PTN) intervertebral fusion devices, produced by self-propagating high-temperature synthesis, represent an alternative to traditional long-term implants in the orthopaedic field. PTN promotes tissue ingrowth and has succeeded short-term and long-term biocompatibility in vivo testing. In this in vitro study, the PTN morphology was characterized using microfocus computer tomography (mu CT) in order to calculate the active PTN surface. Potentiodynamic polarization testing was then performed to evaluate the in vitro corrosion resistance of PTN devices in Hanks' based salt solution. Direct coupling experiments of PTN with Ti6A14V were also performed in order to establish the galvanic corrosion resistance of PTN intervertebral implants in the presence of potential Ti6A14V supplemental fixation devices. Compared to the behaviour of other orthopaedic biomaterials and solid NiTi devices, PTN devices showed a level of corrosion resistance that is comparable to other NiTi devices and acceptable for the intended orthopaedic application. Further improvement of the corrosion resistance is still possible by specific electrochemical surface treatments.
ISSN: 0964-1726
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
Physical Metallurgy and Materials Engineering Section (-)
× corresponding author
# (joint) last author

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