Two articles in the British Journal of Oral and Maxillofacial Surgery report: 1) a high number of metal allergies in Temporomandibular Disorders (TMD) patients needing total replacement of their TM joints and 2) one year follow-up data comparing patients with metal allergies treated with all titanium total joint replacements (considered non-allergenic) with non-allergic patients treated with standard cobalt-chromium replacements joints.