In a total hip replacement, normally the ball and the socket in the joint are replaced by metal implant devices. Hip devices imitate the joint by implanting the patient with a ball that mimics the femoral head and a cup that mimics the acetabulum socket. Around 2000 several hip replacement manufacturers placed metal on metal implants on the market. These implants may cause serious injuries because the metal ball and cup grind against each other causing metal debris to enter the body, causing a number of symptoms.
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