I am interested to know more about artificial joints for human body. Information required is regarding material, FDA Approval, manufacturing technologies, etc.
For your search try using Hip implant, knee implant etc, not joints. also TKA and THA for surgery techniques (total knee anthroplasty) materials are cobalt chrome, stainless steel, and titanium mostly. UHMWPE for bearing surfaces, some ceramics. You should be overwhelmed at this point.