Stryker Rejuvenate Recall Litigation in State, Federal Courts Stryker Orthopaedics has ceased to recruit subjects for its longitudinal study on one of its two recently recalled hip implant models, but it has continued to try to resolve lawsuits filed by the ailing patients of both hip replacement stems. Meanwhile, a major orthopedic medical journal has published a study that reaffirmed the corrosive potential of such devices.