Assessment of the Impact on the Quality of Life of Surgically Assisted Maxillary Expansion in Adult Patients Followed for Obstructive Sleep Apnea Syndrome

Inclusion Criteria: * Adult patients * With obstructive sleep apnea confirmed by polysomnography * Surgical indication for surgically maxillary expansion Exclusion Criteria: * \- Patients refusing to participate in the survey having formulated their opposition * Diabetes, * Obesity (BMI\> 30) * Failure to provide informed written consent * Refusal or inability to return to all follow-up visits and sleep studies * Patient pregnant or planning to become pregnant in the next 12 months or breastfeeding * Surgical resection or radiation therapy for cancer or congenital malformations of the larynx, tongue or throat (Note that some previous surgeries, such as uvulopalatopharyngoplasty (UPPP), tonsillectomy or adenoidectomy, to remove obstructions related to obstructive sleep apnea are allowed) * Obvious obstructions of the fixed upper airways (tumors, polyps or nasal obstruction) * Patients who have undergone previous surgery on the mandible and / or maxilla, other than dental treatment. * Patients included in another clinical study (excluding registers). * Patients taking medicines such as opiates which may affect sleep, alertness or breathing