Stryker, a medical products company based in Kalamazoo, MI, sells several types of hip replacements for patients who need this joint replaced after an injury or medical condition has caused damage. In June 2012, the company announced a recall of its Rejuvenate and ABG II model hip implants. Although Stryker says the risk associated with the implants is “very low,” it has not released specific numbers showing how many people have been affected.
The implants were recalled due to concerns over “fretting” and corrosion within the implants. Fretting occurs when tiny movements within parts that haven’t been securely attached result in wear on the surfaces of the implant that touches one another. Corrosion may occur when the metal oxidizes, creating metal ions that may cause injury at the implant site or that may travel throughout the body.