Anti-snoring mouthpieces: what to know

The device creates more room behind the tongue while you sleep. It does not address every cause of noisy breathing, and persistent snoring can require an assessment for nasal obstruction or obstructive sleep apnoea.

A mandibular advancement device moves the lower jaw slightly forward. A tongue-retaining design instead keeps the tongue from falling backwards. Both aim to reduce vibration as air passes through the throat.

A custom device made after a dental assessment can account for your bite, teeth and jaw movement. Ready-made versions may be less adaptable. Dentures, loose teeth, gum disease, jaw-joint symptoms or limited jaw movement can affect whether a mouthpiece is suitable.

Have your teeth, gums and jaw checked before choosing a device. Follow its fitting and cleaning instructions, store it dry, and inspect it for cracks or distortion. A dentist can adjust a custom mouthpiece if it rubs, feels unstable or strains the jaw.

Dry mouth, extra saliva, tooth tenderness and morning jaw stiffness can occur during adjustment. Stop using the device and arrange a review if pain persists, the bite feels changed after the morning, or a tooth becomes loose.

Arrange a medical assessment if snoring is loud and regular, or if someone notices pauses, choking or gasping during sleep. Morning headaches, poor concentration and marked daytime sleepiness also warrant review because obstructive sleep apnoea can present with these features.

Do not rely on a mouthpiece to self-treat suspected sleep apnoea. Seek urgent help if breathing difficulty continues while awake, or if severe sleepiness makes driving or operating machinery unsafe.

Ask whether your symptoms suggest a sleep assessment, which mouthpiece design fits your dental health, who will adjust it, and how changes in your bite will be monitored. Mention nasal blockage, medicines that cause drowsiness, alcohol near bedtime and any previous dental or jaw treatment.