Corrosion behavior of tantalum-coated cobalt-chromium modular necks compared to titanium modular necks in a simulator test.

Corrosion behavior of tantalum-coated cobalt-chromium modular necks compared to titanium modular necks in a simulator test.

The Journal of arthroplasty (2013-10-09)

Ulrich Dorn, Daniel Neumann, Mario Frank

ABSTRACT

This study compared the corrosion behavior of tantalum-coated cobalt-chromium modular necks with that of titanium alloy modular necks at their junction to titanium-alloy femoral stem. Tests were performed in a dry assembly and two wet assemblies, one contaminated with calf serum and the other contaminated with calf serum and bone particles. Whereas the titanium modular neck tested in the dry assembly showed no signs of corrosion, the titanium modular necks tested in both wet assemblies showed marked depositions and corrosive attacks. By contrast, the tantalum-coated cobalt-chromium modular necks showed no traces of corrosion or chemical attack in any of the three assemblies. This study confirms the protective effect of tantalum coating the taper region of cobalt-chromium modular neck components, suggesting that the use of tantalum may reduce the risk of implant failure due to corrosion.

MATERIALI

N° Catalogo

Marchio

Descrizione del prodotto

262846

Sigma-Aldrich

Tantalum, powder, −325 mesh, 99.9% trace metals basis

545007

Sigma-Aldrich

Tantalum

262919

Sigma-Aldrich

Tantalum, foil, thickness 0.025 mm, ≥99.9% trace metals basis

357243

Sigma-Aldrich

Tantalum, foil, thickness 0.05 mm, ≥99.9% trace metals basis

262897

Sigma-Aldrich

Tantalum, foil, thickness 0.25 mm, ≥99.9% trace metals basis

692824

Sigma-Aldrich

Tantalum, powder, 60-100 mesh, 99.9%

262862

Sigma-Aldrich

Tantalum, wire, diam. 1.0 mm, ≥99.9% trace metals basis

GF49190249

Tantalum, foil, 50x50mm, thickness 0.5mm, annealed, 99.9%

GF68984229

Tantalum, foil, 100x100mm, thickness 1.0mm, annealed, 99.9%

357251

Sigma-Aldrich

Tantalum, foil, thickness 0.5 mm, ≥99.9% trace metals basis

262889

Sigma-Aldrich

Tantalum, foil, thickness 1.0 mm, ≥99.9% trace metals basis

GF71165505

Tantalum, foil, light tested, 150x150mm, thickness 0.05mm, annealed, 99.9%

GF60298195

Tantalum, foil, 100x100mm, thickness 0.25mm, annealed, 99.9%

GF71816889

Tantalum, mesh, 100x100mm, nominal aperture 0.43mm, wire diameter 0.075mm, 50x50 wires/inch, open area 72%, plain weave mesh

GF76534500

Tantalum, foil, 100x100mm, thickness 0.100mm, annealed, 99.9%

GF82228989

Tantalum, rod, 100mm, diameter 1.0mm, 99.9%

GF31333137

Tantalum, sphere, 100pcs, diameter 1.0mm, precision sphere grade, 99.9%

GF80276182

Tantalum, foil, 100x100mm, thickness 0.125mm, annealed, 99.9%

GF02019956

Tantalum, mesh, 40x40mm, nominal aperture 0.43mm, wire diameter 0.075mm, 50x50 wires/inch, open area 72%, plain weave mesh

GF65833779

Tantalum, wire reel, 1m, diameter 0.8mm, annealed, 99.9%

GF42240530

Tantalum, pellets, 50g, max. size 10mm, 99.9%

GF84004231

Tantalum, tube, 100mm, outside diameter 7.0mm, inside diameter 6.7mm, wall thickness 0.15mm, as drawn, 99.9%

GF88338730

Tantalum, foil, 50x50mm, thickness 6.0mm, 99.9%

GF66812564

Tantalum, foil, 150x150mm, thickness 0.100mm, annealed, 99.9%

GF16013393

Tantalum, foil, 1m coil, thickness 0.04mm, coil width 1mm, annealed, 99.9%

GF91998253

Tantalum, foil, light tested, 100x100mm, thickness 0.025mm, as rolled, 99.9%

GF43085314

Tantalum, tube, 1000mm, outside diameter 3.1mm, inside diameter 2.6mm, wall thickness 0.25mm, as drawn, 99.9%

GF33986087

Tantalum, wire reel, 0.5m, diameter 0.8mm, annealed, 99.9%

GF69718078

Tantalum, rod, 200mm, diameter 1.0mm, 99.9%

GF38737929

Tantalum, pellets, 20g, max. size 10mm, 99.9%