Hip pain is a common complaint with a wide variety of potential causes. One method of alleviating chronic hip pain is hip replacement. Hip replacement devices can be made from a variety of materials. One of the most common types of hip replacement device is the metal-on-metal hip implant, which was initially thought to be a long-lasting and reliable means of helping patients with hip pain. However, over time, it has become apparent that friction between the metal joints used in hip implants can...