The ADM X3 Mobile Bearing Acetabular System for hip replacement surgery is intended to minimize the risks associated with total hip-replacement surgery. The device uses the developer's special advanced bearing technology, which is designed to increase the longevity of implants. According to the company, lab tests have shown a 97% reduction in volumetric wear compared to conventional polyethylene. And the design's dual points of articulation are said to help accommodate multi-directional movement. Stryker Orthopaedics, 325 Corporate Dr. Mahwah, NJ, (201) 831-5000.