The FDA announced that in the future it would be looking more closely at a range of medical devices and products — along with the materials they’re made from — that have caused the most trouble for consumers in recent years. The agency singled out breast implants, metal-on-metal hip replacement systems, and the components of birth control implant system Essure. Most strikingly, the announcement targeted not just the final products manufactured by medical device companies, but the materials they used to make the products.