Zimmer, Inc. has received FDA clearance on their highly crosslinked, Vitamin E containing UHMWPE. The 510(k) application is for a hip liner, and is being marketed under the trademarked name "Vivacit-E" (pronounced 'vicacity'). Zimmer is advertising the new material in their Continuum acetabular shell system, shown above.
Link to 510(k)
Link to Zimmer Continuum Website