Tongue Advancement for Obstructive Sleep Apnea

Inclusion Criteria: * Documented diagnosis of obstructive sleep apnea with AHI 15-50 measured within a year prior to enrollment with no major change in BMI * Bewteen 20 and 65 years old * Body Mass Index (BMI) ≤ 32 * Patient has been offered CPAP and has refused or failed to continue CPAP treatment * Identified evidence of airway collapse, primarily at the base of the tongue * Signed informed consent to participate in this clinical study Exclusion Criteria: * Prior OSA surgery except tonsillectomy, nasal surgery and uvulopalatopharyngoplasty; no airway surgery within 3 months prior to enrollment. * Airway collapse at the level of the soft palate (palatal collapse). * Enlarged tonsils (3+ and 4+) * Anatomy unable to accommodate the implant * Severe mandibular deficiency/retrognathia * Unable and/or not willing to comply with treatment follow-up requirements. * Pregnancy. (Female subjects of childbearing potential must have a negative pregnancy test prior to enrollment and should maintain adequate contraception during the study) * Breastfeeding women * Active systemic infection * Allergy to any medication used during implantation * Previous history of neck or upper respiratory tract cancer * History of radiation therapy to neck or upper respiratory tract * Dysphagia * Major cardiovascular and pulmonary disorders * Other medical, social or psychological problems that, in the opinion of the investigator, preclude them from receiving this treatment and the procedures and evaluations pre- and post-treatment * Enrollment in another pharmacological or medical device study that may effect or bias the results of this clinical study