This VDOS webinar will discuss the diagnosis and treatment of a variety of temporomandibular joint (TMJ) disorders and numerous other differential diagnoses for dogs and cats that present with unwillingness or inability to either open or close the mouth. The focus will be on the management of TMJ luxation, open-mouth jaw locking, TMJ ankylosis, and masticatory muscle myositis. The didactic lecture will last 1.5 hours, but the webinar is designed so that there is extra time for interactive participation and answering your questions.