Stryker has recalled 2 modular-neck stem hip implant components – the Rejuvenate and the ABG II. The reason is that there are “potential risks associated with fretting and corrosion at the modular neck junction.”  The fretting and corrosion may result in adverse tissue reactions. The implants are not metal-on-metal hips, such as the  DePuy ASR, where both the acetabular cup and femoral ball are made of metal. With metal-on-metal hips, the debris caused by the friction between the metal can lead to adverse tissue reactions around the implant. The recall was triggered by more than 60 adverse events filed with the FDA’s MAUDE adverse event reporting system. Common symptoms of reactions include swelling around the implant site, pain in the groin, thigh, or hip, rash, and fatigue.