Metasul® Metal-on-Metal Technology
Precision
The challenge in manufacturing Metasul components is to achieve exact precision with regard to diameter, sphericity and roughness. The quality of the components during manufacture remains consistent by validated processes and thorough inspections. Surface roughness and sphericity have been identified as variables that can influence the wear performance of metal-on-metal components.
This Graphic demonstrates important parameters of metal-on-metal articulations during manufacturing
Surface Roughness
A low surface roughness improves lubrication and results in lower wear in a metal-on-metal articulation. Using advanced grinding and polishing technologies, Metasul components can be finished to an extremely low surface roughness of only a few nanometers.
Sphericity
Beside the tolerances of the diametrical clearance there are also tolerances on the sphericity of the femoral head and acetabular component. Surface deviations from a theoretically perfect sphere can change the local radii between the articulating surfaces.
To avoid these undesirable changes, a high degree of sphericity must be achieved during manufacturing. Metasul components meet stringent standards for quality and dimensions. Every component must pass a dimensional as well as a final optical inspection to ensure its optimal function in clinical use.
