Durom™ Hip Resurfacing
Protasul 21WF
Co28Cr6Mo alloy with carbon content of 0.2% - ISO 5832-12
Structure
- Fine-grained austenitic matrix
- Fine ingot carbide
Properties
- High mechanical strength values in the hot- and
cold-worked condition
- High resistance to wear
- Articulation partner
against UHMW-PE (Sulene-PE)
- Articulation partner against itself
(Metasul)
- Weldable with other Co alloys
Processing
- Machining from hot-rolled bar
- Hot forging
Typical application
- Metasul metal-on-metal combination
-
High-stress connecting elements in modular prostheses
Mechanical data according to ISO 5832-12
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PorolockTi VPS
The Porolock™- Ti VPS, a coating of pure titanium is applied to the outer surface of the acetabular component using an advanced vacuum plasma spray technology developed by Sulzer Metco, a Swiss based surface technology leader. Laboratory tests have demonstrated an adhesive strength of 66.2 - 76.5 MPa, this is significantly exceeding the FDA requirements of 22 MPa.
The same adhesive strength test of the Porolock Ti VPS surface on a CoCr substrate using a test set up simulating adverse conditions resulted in 31.6 - 63.2 MPa, still exceeding the FDA requirement.
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Roughness Rz 20µm =Ra =50µm Thickness t 200µm =t =400µm Porosity 25 +/- 10 % Pore size ~20 – 60µm |
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