Researchers surprised by metal ion levels in Metal-on-Metal hips after 5-years

Researchers surprised by metal ion levels in 5-year follow-up of MoM THA implants (OrthoSuperSite)
The 5-year postoperative metal ion levels plateaued in cases having 28-mm metal-on-metal hip bearings but continued to increase for 36-mm metal-on-metal bearings, according to a recently presented prospective study involving 120 patients.
“This was a prospective randomized trial with three arms: a 28-mm polyethylene liner, 28-mm metal-on-metal (MoM) and a 36-mm [MoM],” C. Anderson Engh Jr., MD, said at the American Academy of Orthopaedic Surgeons 2012 Annual Meeting, in San Francisco. “The same s...