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

ZUSAMMENFASSUNG

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.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

262846

Sigma-Aldrich

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

545007

Sigma-Aldrich

Tantal

262919

Sigma-Aldrich

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

357243

Sigma-Aldrich

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

262897

Sigma-Aldrich

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

692824

Sigma-Aldrich

Tantal, powder, 60-100 mesh, 99.9%

262862

Sigma-Aldrich

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

GF49190249

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

GF68984229

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

357251

Sigma-Aldrich

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

262889

Sigma-Aldrich

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

GF71165505

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

GF60298195

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

GF71816889

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

GF76534500

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

GF82228989

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

GF31333137

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

GF80276182

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

GF02019956

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

GF65833779

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

GF42240530

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

GF84004231

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

GF88338730

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

GF66812564

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

GF16013393

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

GF91998253

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

GF43085314

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

GF33986087

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

GF80066392

Tantal, pellets, 100g, max. size 10mm, 99.9%

GF69718078

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