The FDA on Thursday will propose rules to stop manufacturers from selling a type of artificial hip that, in many cases, is failing early. According to the New York Times (1/17, B1, Meier, Subscription Publication, 1.68M) an estimated 500,000 patients in the US have received the artificial hip. Under the FDA proposal, "makers of artificial hips with all-metal components would have to prove the devices were safe and effective before they could continue selling existing ones or obtain approval for new all-metal designs." The action "is intended to close a loophole in the 1976 federal law under which medical devices were first regulated. It is the agency's first use of powers that Congress granted to it last year to deal with medical devices, like all-metal hips, that have been in regulatory limbo for decades."