Analysis of Mandibular Movements in Ventilated Children With Sleep Apnea Syndrome

Inclusion Criteria: * Children aged 5-18 years inclusive. * With a diagnosis of severe OSA diagnosed at PSG, defined by an apnoea-hypopnoea index ≥ 10/ hours or an apnoea index ≥ 5/ hours, and associated or not with alveolar hypoventilation. * Ventilated with noninvaisve ventilation or continuous positive airway pressure during sleep. * With a nasal or nostril interface. * Followed in one of the 2 participating centres: the Grenoble-Alpes University Hospital or the Trousseau Hospital in Paris. Exclusion Criteria: * Patients with centrally-induced sleep apnoea syndrome. * Patients at the end of life or for whom limitation of active therapies has been established. * Patients ventilated with a naso-oral interface.