@dannyandebbie

There are implants out there that don't have cobalt and chromium. My knee replacement is made of oxinium which is oxidized zirconium. My hip replacement is made of titanium but I am not allergic to metals. The same company that makes the knee implant also has a hip implant made of the same material:
https://www.smith-nephew.com/en-us/health-care-professionals/products/orthopaedics/oxinium