The top picture is the unworn surface, the lower the surface after a wear test against the cobalt-chromium metal joint. · Wear causes surface breakup of the polymer giving a fiber like structure and ...

Nickel, cobalt, and chromium are the three most common metals that elicit both cutaneous and extracutaneous allergic reactions from chronic internal exposure. However, other metal ions as well as ...

Cobalt (Co) is a lustrous, silvery-blue, non-ferrous metal found in cobaltite ... They consist mostly of cobalt and chromium but may also contain tungsten or molybdenum and a small amount of carbon.