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British Journal of Orthodontics, Vol. 26, No. 3, 205-210, September 1999
© 1999 British Orthodontic Society

An Investigation into the Changes in Airway Dimension and the Efficacy of Mandibular Advancement Appliances in Subjects with Obstructive Sleep Apnoea

Amandeep Johal, B.D.S. (Hons), F.D.S.R.C.S. (Eng.), M.Sc.D, M.Orth, R.C.S., F.D.S. (Orth.) R.C.S., D.M.S. and Joanna M. Battagel, Ph.D, B.D.S., F.D.S. R.C.S., M.Orth, R.C.S.

Department of Orthodontics, Guy's Hospital, London, U.K.
Department of Orthodontics, Royal London Hospital, London, U.K.

This prospective clinical study evaluates a group of 37 male Caucasians with obstructive sleep apnoea for changes in airway dimension and the efficacy associated with the use of mandibular advancement splints. Lateral skull radiographs were obtained with the subjects—upright in occlusion, supine in occlusion, and supine in protrusion. Each radiograph was traced and digitized, and changes in mandibular position, airway dimensions, and hyoid were examined. Subjects were invited to complete pre- and post-treatment questionnaires, and interviewed following fitting of a removable Herbst mandibular advancement splint.

Significant changes were recorded in the airway dimensions in response to both a change in position, from upright to supine, and in response to mandibular advancement. A compliance rate of 76 per cent was achieved with no reported serious complications associated with the use of mandibular advancement devices.

Key words: Mandibular Advancement Splints, OSA, Supine Films




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