Medical News Today -- Zimmer Holdings, Inc. (NYSE: ZMH; SIX: ZMH), a global leader in musculoskeletal care, launched the Zimmer NexGen LPS-Flex Mobile Bearing Knee with Prolong Highly Crosslinked Polyethylene (XLPE) in the United States. The LPS-Flex Mobile Bearing knee provides a revolutionary anteriorly-positioned pivot near the entry point of the anterior cruciate ligament (ACL), replicating the anatomic center of knee rotation.