Article Title and Bibliographic Information: Health-Related Quality of Life in Patients with Sleep-Disordered Breathing: Effect of Mandibular Advancement Appliances. Johal A. J Prosthet Dent 2006;96(4):298-302. Level of Evidence: 2b. Purpose/Question: Do mandibular advancement appliances effect health-related quality of life in patients with sleep-disordered breathing? Source of Funding: Information not available. Type of Study/Design: Cohort Study.