May. 14, 2013
By: Diana Holan, MS There are currently more than 250,000 hip replacements performed in the US annually. This procedure was relatively uncommon before the late 1990s, but with the development of titanium and cobalt/chromium metal-on-metal (MoM) bearing surfaces, sales rapidly increased and a highly competitive market was born. But new health concerns soon arose because the cobalt ions easily pass