Mandibular advancement devices for the control of snoring.

Patients presenting with the complaint of antisocial snoring have very few options available to them of proven efficiency. Mandibular advancement devices worn intra-orally at night, have recently been shown in controlled trials to help mild to moderate obstructive sleep apnoea. However, there are no properly controlled studies with objective measurements on the use of such appliances for the management of antisocial snoring. Fifteen patients, already established on mandibular advancement devices for the control of snoring, were asked to participate in this study. They were studied over two nights, using a portable sleep monitoring device at home, both with and without their mandibular advancement devices in place (in randomized order). Snoring was measured using a surface throat microphone. In addition oxygen saturation and indirect beat to beat blood pressure were measured. The latter (using pulse transit time) provided an index of autonomic "arousals" and a measure of inspiratory effort. In nearly all of these highly selected patients the mandibular advancement devices reduced significantly the amount of snoring from a median of 193 to 20 snores x h(-1) (p<0.0001). In addition there was a reduction in respiratory effort, implying enlargement of the upper airway whilst wearing the appliance. These patients only represent those who were able to tolerate the appliance. With such clear evidence of their potential efficacy, and no suggestion from other studies of any harm, it would seem reasonable to introduce this approach into the management of antisocial snoring.