Custom vs Over-the-Counter Sleep Apnoea Devices: What Is the Difference and Does It Matter?

If you have been told you snore, or you have looked into sleep apnoea treatment and come across mandibular advancement splints at a pharmacy or online, you may be wondering whether the over-the-counter version does the same job as the custom-made one your specialist has recommended. It is a fair question, and the answer depends on what you are trying to treat.

What are these devices and how do they work?

Mandibular advancement splint, sometimes called MAS, mandibular advancement device or oral appliance, work by holding the lower jaw in a slightly forward position during sleep. This forward positioning tightens the soft tissue and muscles at the back of the throat, keeping the airway open and reducing the likelihood of it collapsing during sleep.

Both over-the-counter and custom-made devices work on the same basic mechanical principle. The meaningful differences lie in fit, adjustability, and clinical appropriateness for the condition being treated.

What is an over-the-counter splint?

Over-the-counter mandibular advancement splints are available at pharmacies and online without a prescription. Most use a boil-and-bite fitting method, where the device is softened in hot water and then moulded approximately to the shape of the teeth. Some are one-size-fits-all with no moulding at all.

The jaw advancement position in most over-the-counter splints is fixed. You wear the splint at whatever position it sets, which may or may not be appropriate for your anatomy, your bite, or your airway.

They are generally inexpensive and accessible. For some people with simple, occasional snoring and no underlying sleep disorder, an OTC splint may provide some benefit. However they are not regulated as therapeutic devices for the treatment of obstructive sleep apnoea in Australia, and they are not substitute for management of a diagnosed sleep disorder.

What is a custom-made splint?

A custom-made oral appliance is fabricated specifically for your mouth using a precise record of your teeth and bite. At Perth Oral Medicine and Dental Sleep Centre, this is done using digital intraoral scanning, with no impression material or gagging. The appliance is 3D printed to exact specifications.

Critically, a custom appliance is titratable. This means the jaw advancement position can be adjusted incrementally over a series of appointments until the optimal position for your airway is established. Too little advancement and the airway is not adequately supported. Too much and the jaw muscles and joints are placed under unnecessary strain. Establishing the right position is a clinical process, not a one-time setting.

The fit is monitored over time and adjusted as needed.

Does the difference matter for snoring?

For simple snoring in a person with no underlying sleep disorder, an over-the-counter splint may reduce snoring to some degree for some people. The evidence base is limited and results vary considerably. If snoring is the primary concern and a sleep study has confirmed the absence of obstructive sleep apnoea, an over-the-counter splint is a lower-cost option worth discussing with your GP or dentist.

The important caveat is that snoring is sometimes the presenting symptom of obstructive sleep apnoea, a condition that carries significant cardiovascular and metabolic health risks if left untreated. Using an over-the-counter splint for snoring without first ruling out obstructive sleep apnoea means potentially masking a symptom of a more serious underlying condition. A sleep study before starting any device is the recommended first step.

Does the difference matter for sleep apnoea?

For diagnosed obstructive sleep apnoea, the difference is clinically significant. Obstructive sleep apnoea is a medical condition that requires treatment matched to its severity, monitored for effectiveness, and adjusted over time. An over-the-counter splint cannot fulfil those requirements.

The jaw advancement position that adequately opens the airway varies between individuals and needs to be found through a titration process. A mandibular advancement splint that feels comfortable to wear is not necessarily one that is controlling the apnoea events.

For mild to moderate obstructive sleep apnoea in particular, oral appliance therapy delivered through a specialist with appropriate clinical oversight is a well-evidenced treatment option with outcomes comparable to CPAP for this severity range. That clinical process cannot be replicated by an over-the-counter splint.

What should you do first?

Before purchasing any device for snoring or sleep apnoea, the most useful step is to find out what you are actually dealing with. A sleep study, which can often be done at home with a portable monitor, will tell you whether you have sleep apnoea, how severe it is, and what level of intervention is appropriate. Your GP can arrange this, or our practice can coordinate it.

If you have already been diagnosed with OSA and are looking at your treatment options, a consultation at our practice will give you a clear picture of whether a custom oral appliance is suitable for you, what the process involves, and what outcomes you can realistically expect.

The splint that works is the one that is right for your condition, fitted correctly, and monitored properly.

To learn more, call us on (08) 9376 6789.

IMPORTANT: This content is for general information purposes only. It does not constitute medical or dental advice. Readers should consult a qualified health professional regarding any personal health concerns.