Arthroplasty Today marks its first year in publication as the open-access, online journal from AAHKS with an issue focusing on complexities of adverse local tissue reactions associated with metal debris. Douglas W. Van Citters, PhD, Retrieval Lab Director and Assistant Professor of Engineering from the Thayer School of Engineering at Dartmouth provides the guest editorial. With the December issue, Arthroplasty Today becomes the official journal of the American Joint Replacement Registry and includes a summary of 2014 findings. This issue also features case reports, surgical technique and original research articles. To read the full-text of all the articles, visit