Possible problems with hip implants
Unfortunately, certain metal on metal implants used for hip replacement procedures were found to wear down, causing potentially serious adverse reactions inside the body. This deterioration affected a number of brands of hip implants; common symptoms included clicking sounds or numbness in the leg.
When introduced, Depuy ASR metal on metal implants were billed as a new generation of hip prosthesis, more durable and less likely to dislocate. They were aimed particularly at active, younger patients.
Unfortunately, though widely used, ASR hip joints were liable to degenerate and fail earlier than expected, thereby releasing metal debris and dangerous levels of chromium and cobalt. Apart from localised damage or destruction of soft tissues and consequent inflammation, signs included erosion of the muscles, unusual groin and buttock discomfort or pain – and even benign tumours. A recall started in summer 2010, shortly after the defects were first discovered. Depuy Orthopaedics is part of the Johnson & Johnson group.