If you're concerned that your sleep is too shallow, you may have sleep apnea syndrome?! And it could lead to hardening of the arteries, heart failure, or high blood pressure...?!
Anyway, using a mouthpiece forces the 
jaw forward, keeping the airway open.
على أي حال، استخدام لِجام الفم يدفعُ
الفكَّ للأمام ليُبقي القناة الهوائية مفتوحة
Damit wird der Unterkiefer nach vorne gezogen
und so die Atemwege offengehalten.
Sea como sea, el aparato de avance mandibular
De todos modos, el aparato 
de avance mandibular
Lors de l’utilisation du protège-dents
Comunque, il mouthpiece blocca la mascella 
mantenendo le vie respiratorie aperte.
A bocadura força a mandíbula se abrir 
e não obstruir a passagem de ar.