RecruitingDevice studyHome-based Under Mattress Monitor for OSAThe aim of the study is to evaluate the effectiveness of the under-mattress monitoring device to aid in the titration process of a mandibular advancement device (MAD) for the management of obstructive sleep apnea (OSA). A secondary aim is to evaluate changes in subjective OSA symptoms and patient's satisfaction with MAD. A third aim is to analyze if there are differences between the sleep parameters recorded by the under-mattress monitor between responders and non-responders to MAD therapy.