Duration¿ packaging distributed by || Stryker¿ Orthopaedics, Limerick, Ireland || Stryker¿ Ireland || Carrigtwohill Industrial Estate || Carrigtwohill County Cork, Ireland || Product Usage: || Orthopaedic implants utilized for primary and revision hip and knee (total and unilateral); total shoulder and elbow replacement; replacement; and oncological surgical procedures related to tumor resection. All devices are manufactured from UHMWPE and are processed through post-sterilization (gamma irradiation) heat treatment for stabilization (i.e. Duration¿¿ process). Launched in 1996, Duration¿¿ Stabilized Polyethylene is produced by a patented process utilizing a combination of nitrogen packaging to reduce shelf oxidation, gamma irradiation (3Mrads) to sterilize and crosslink the polyethylene, and a post-irradiation stabilization step during which the components undergo a heat treatment process to promote further crosslin king and to enhance product wear resistance. In order to maintain the nitrogen environment over the shelf-life of the product, the packaging consists of double, nested PET blisters sealed with foil (non-gas permeable) Iidstock.