Metal-on-metal hip systems such as the DePuy Pinnacle, DePuy ASR, Stryker Rejuvenate, Stryker ABG II, Stryker Accolade, Wright Pro Femur and Wright Conserve, have the highest failure rate compared to any other hip implant. Most individuals experience serious complications and subsequent failure with these implants. Complications from metal-on-metal hips include cobalt-chromium toxicity, metallosis, pseudotumors, infection, loosening and implant wear, joint stiffness, and fracture. These complications cause implant failure. Implant failure requires a second surgery, known as a revision surgery. A revision surgery requires removing the failed implant(s) and replacing with a new device.
Revision surgery is more complex and risky than the index surgery because it is more invasive. Therefore, the risk of complications is greater with a revision surgery than initial surgery. The implants are more likely to loosen, migrate, and fracture since the bone and hip joint are severely manipulated from the previous implant.