The retainers have been primarily tested in bearings used for dental hand pieces, with ongoing research and development for medical devices. This technology can extend the operational life of a medical or dental bearing and reduce hospital-related infections. The composite metal-polymer retainer boosts the operational life of the bearing up to 70% in extreme environments, the manufacturer claims. The retainers help overcome lubrication problems by combining the solid-film lubricating properties of the silver with the strength and durability of the polymer. The retainers feature antifriction properties, thermal stability, and low moisture absorption.