Home > Orthopedics > Metal on Metal Hip Replacement Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Apr 06, 2008 by JCuckler, Views: 7210 Traditional metal on plastic hip replacements can wear down in younger, more active patients, who need the hip for a longer period of time. Newer metal on metal hip replacements wear down at a much slower rate. Dr. John Cuckler. Univ. of Alabama at Birmingham.