| http://www.w3.org/ns/prov#value | - The core 6 and the anchor engaging members 4 and 16 may be made from metal, metal alloys, such as cobalt chrome, or other suitable materials, including plastic polymers, such as polyetheretherketone (PEEK), ultra-high-molecular weight-polyethylene (UHMWP), polyurethanes and composites, including composites containing carbon fiber and layers of different materials.
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