Bonesmart.org explains that steel, but not titanium, hip implants were recalled by the United States Food and Drug Administration in 2010. Bonesmart states that the recall occurred because of metal shedding and an unexpected failure rate of the implants.
According to Bonesmart, officials were worried that when the steel parts rubbed against each other, tiny bits of metal fell into the joint area and bloodstream causing pain and other complications. The steel hip implants show a 12-percent failure rate. As Bonesmart explains, that failure rate is more than double the expected outcome, and it is connected with loosening of the artificial joint and hip dislocation.