5 Point Design Rational
Zimmer optimizes polyethylene performance by addressing five key factors:
Material - Highest quality ultra-high molecularweight polyethylene with no calcium stearate added. This material must pass strict inspections to ensure that it meets exacting Zimmer quality standards.
Processing - Computer-controlled, compression molding method is used to help assure maximum consolidation .
Design - Zimmer compression-molded polyethylene has a documented history of more than 20 years of clinical success.1 5 Careful attention has been given to minimizing articular surface and backside surface wear, and maintaining optimum poly thickness.
Sterilization - Gamma irradiation in an inert atmosphere promotes cross-linking, which has been shown to improve durability and wear resistance in laboratory testing.
Packaging - Nitrogen packed in a protective cavity to minimize shelf oxidation.
