Mandibular Repositioning Appliances (MRA) are devices used to treat snoring and Obstructive sleep apnea (OSA). A study of 185 people in Sweden, who had been using MRA’s for an average of 5.4 years, showed that the regular use of MRA’s was associated with a reduction in sleepiness, headaches and day time naps. The rate of compliance with the MRA’s was 78% for snorers and 74% for OSA patients.
J Sleep Res. 2007 Dec; 16 (4): 414-20