According to a New York Times analysis, 75 percent of the hip replacement complaints used the DePuy Articular Surface Replacement (ASR). The DePuy Orthopaedics Inc, a division of Johnson & Johnson, had announced a worldwide recall of two of its hip replacement systems, the ASR XL Acetabular System and the DePuy ASR Hip Resurfacing Platform, August of last year. Not withstanding its hip replacement troubles, Depuy has passed another product through the beleaguered FDA approval.
In the analysis, it was found that the complaints on metal on metal hip implants registered by the Food and Drug Administration (FDA) in 2011 so far has already reached more than 5,000.  The year 2011 is still on its third quarter but the number of complaints received this year so far has already surpassed the combined number of complaints received by the FDA in the previous four years. Experiencing pain, swelling and difficulty walking which are among the symptoms of metallosis have been reported by patients who’ve had these devices. 
A hip implant’s life expectancy is about 15 years, however, many recipients have had their hip replacements removed after just a few years due to the failure of the medical devices. Approximately one third of all hip replacements each year used metal on metal type of implants.Metal on metal implants’ reported complaints range from pain to severe reactions to chromium and cobalt particles that separate from the device as they wear inside the body.  
Most of these complainants have used the DePuy ASR, according to the New York Times analysis.DePuy had already announced its intention to cover reasonable and customary costs of monitoring and treatment for services, including revision surgeries, associated with the recall of ASR. By settling claims with patients before they fully understand their legal rights or the likely cost of their hip-related medical costs in the future, critics alleged that the company had done it more to save money.  
Regardless of the manufacturer, many surgeons have simply stopped using the devices due to its problems and instead favor devices that are a combination of metal and plastic components.The ASR system had a failure rate of up to 49 percent after six years according to the data from a study released in March by the British Orthopaedic Association and the British Hip Society, nearly four times the rate cited by DePuy when it announced the hip replacement recall.