Hip replacement prosthetics are supposed to help patients relieve hip pain and improve mobility. Some hip replacement devices, specifically metal-on-metal, can lead to serious complications. The following metal-on-metal hip replacement implants are associated with an increased risk of metallosis, cobalt toxicity, pseudotumors, and eventual need for revision surgeries.DePuy Pinnacle. DePuy Orthopaedics, a subsidiary of Johnson & Johnson, manufactured Pinnacle hip implants. The company manufactured...