Home Design Performance Material Beyond natural motion and anatomical fit, a high performance knee implant must be made from the most technologically advanced materials in orthopaedics. The GENESIS* II knee is made from OXINIUM* Oxidized Zirconium, a unique metal alloy available only from this knee's manufacturer, Smith Nephew, Inc. Wear-resistant In lab tests, ceramic-like OXINIUM material reduces knee implant wear by up to 85-percent compared to cobalt chrome the metal used in virtually all other knee implants on the market. That means the GENESIS II knee has the potential to last longer for active women. Lightweight The thighbone component of the GENESIS II knee, which is the portion made with OXINIUM technology, weighs a full 20% less than a similarly sized implant made from cobalt chrome. Hypoallergenic OXINIUM Oxidized Zirconium is the only total knee implant material that contains no detectable amounts of nickel or chromium, the two metals commonly associated with metal allergy. If metal jewelry irritates your skin, a GENESIS II knee made with OXINIUM technology may be right for you. For more information about knee repacement surgery, visit www.MyLifeInAction.com. *Trademark of Smith Nephew. Reg. US Pat. TM Off.