“…Concern about potential metal ion carcinogenicity has been expressed by such authors as Gillespie et al [16], Haynes et al [20], Hicks et al [21], Howie et al [22], and Lintner et al [30]. Metal wear debris also causes inflammatory, toxic, or allergic local tissue reactions [I, 10,11,18,29,47,49], which may lead to implant loosening [23,26,28,34,41].…”