Snoring happens when the soft tissues in your upper airway vibrate as air squeezes through narrowed breathing passages while you sleep. For many people, this narrowing comes down to jaw position, where your tongue sits, and the natural muscle relaxation that happens overnight. One of the most commonly prescribed non-invasive treatments is a mandibular splint for snoring – a device designed to gently reposition your lower jaw and help keep your airway open.
Mandibular splints are part of the custom oral appliance therapy offered by Absolute Sleep, and they’re backed by solid clinical research for both snoring and obstructive sleep apnoea (OSA). In this article, we’ll explain how mandibular splints actually work, what the evidence says about their effectiveness, how they stack up against CPAP therapy, and what factors influence long-term success.
How a Mandibular Splint for Snoring Works
A mandibular splint, also called a mandibular advancement splint (MAS), is a custom-made oral device you wear while you sleep. It holds your lower jaw slightly forward, which helps prevent your airway from collapsing by creating more space behind your tongue and reducing soft tissue vibration.
When your airway stays more open, airflow becomes smoother and quieter. This can dramatically reduce or even eliminate snoring, and in many cases, improve breathing patterns associated with sleep-disordered breathing.
Unlike the generic mouthguards you can buy over the counter, custom oral appliance therapy is individually designed based on your dental anatomy, jaw movement, and airway structure. Professional fitting and ongoing adjustments are essential for comfort, effectiveness and making sure you’ll actually use it long-term.
Screening and Risk Assessment Using the STOP-Bang Test
Many patients seeking treatment for snoring start by completing a STOP-Bang test as part of their initial assessment. This validated screening tool looks at common risk factors linked to obstructive sleep apnoea, including snoring, daytime tiredness, observed breathing pauses, high blood pressure, body mass index, age, neck circumference and gender.
A higher STOP-Bang score suggests you’re more likely to have sleep-disordered breathing and may need further evaluation. While it’s not a diagnostic test on its own, it helps clinicians work out whether treatments like mandibular splints might be right for you, or whether you need more detailed sleep testing.
For independent, evidence-based information on snoring and sleep apnoea, the Sleep Health Foundation is a great resource.
Evidence and Results: What the Research Shows
The clinical evidence consistently backs up the effectiveness of mandibular advancement splints in reducing snoring and improving sleep-related breathing outcomes.
What Clinical Studies Show
Research looking at mandibular advancement devices across different patient groups has found:
- Significant drops in the Apnoea-Hypopnoea Index (AHI)
- Reduced snoring frequency and intensity
- Improvements in subjective daytime sleepiness
- Better quality-of-life scores
The strongest outcomes are typically seen in patients with mild to moderate obstructive sleep apnoea, as well as those whose main issue is snoring without severe airway collapse.
Long-term studies also show sustained symptom improvement when devices are properly adjusted and reviewed over time. A major Cochrane Review on oral appliances for sleep apnoea supports their use as an effective alternative for appropriately selected patients.
Another study that evaluated the effectiveness of mandibular advancement devices in treating very severe obstructive sleep apnea found that many patients experienced significant symptom improvement, with research reporting meaningful AHI reductions and real relief from snoring and tiredness.
Mandibular Splints Compared to CPAP Therapy
Continuous Positive Airway Pressure (CPAP) therapy remains the gold standard treatment for moderate to severe obstructive sleep apnoea, and it’s highly effective at reducing AHI when used consistently.
However, sticking with CPAP long-term can be challenging for some patients because of mask discomfort, noise or difficulty tolerating the airflow pressure. For suitable candidates, mandibular splints offer a practical alternative.
While mandibular splints might not reduce AHI as much as CPAP in every case, they’re often much better tolerated. When you’re actually comfortable using something, you’re far more likely to use it every night—and that consistent use can translate into real symptom improvement.
You can find more information on treatment pathways on the Absolute Sleep sleep apnoea treatment page.
Mandibular Advancement Splint Cost
The mandibular advancement splint cost varies depending on the device design, custom fabrication, and ongoing clinical care involved.
The price typically reflects a comprehensive clinical assessment, custom fabrication based on your dental impressions, professional fitting, and follow-up appointments to fine-tune comfort and effectiveness.
This personalised approach helps avoid problems like jaw discomfort, bite changes, or poor compliance that can happen with off-the-shelf devices. Cost discussions usually take place during your consultation, which you can arrange via the Absolute Sleep Contact Page.
Factors That Affect Treatment Success
Individual Airway Anatomy
Your jaw position, tongue size, dental alignment, and nasal airflow all play a role in how well your airway stays open during sleep. Patients with mild to moderate airway collapse tend to respond more predictably.
Severity and Pattern of Symptoms
People who experience regular snoring, persistent daytime tiredness, or witness breathing pauses often see clearer improvements when the device is carefully adjusted over time.
Compliance and Ongoing Review
Wearing your splint consistently every night is essential. Regular follow-up appointments allow your clinician to fine-tune the splint position and monitor your progress.
When a Mandibular Splint May Not Be Suitable
Mandibular splints aren’t the right solution for everyone. Patients with severe obstructive sleep apnoea, significant dental issues, or certain jaw joint conditions may need alternative or combined treatment approaches.
A thorough clinical assessment ensures your symptoms are managed safely and appropriately.
Start Sleeping Better
If snoring or sleep-related breathing issues are affecting your sleep quality or energy levels during the day, a professional assessment is the first step. A properly fitted mandibular splint for snoring can provide evidence-based relief when used as part of a structured treatment plan.
Book your consultation with Absolute Sleep.
FAQs on Mandibular Splints for Snoring
How soon will snoring improve with a mandibular splint?
Many people notice reduced snoring within a few weeks. The best results usually come after proper fitting and gradual adjustment under clinical supervision.
Does a mandibular splint treat sleep apnoea symptoms?
Research shows mandibular splints can significantly reduce snoring and daytime tiredness, particularly in people with mild to moderate obstructive sleep apnoea.
What is the difference between a custom splint and an over-the-counter device?
Custom devices are designed specifically for your bite, jaw movement, and airway anatomy, which makes them more effective and comfortable than generic mouthguards.
How long does a mandibular splint last?
With proper care and regular reviews, many splints last several years. How long yours lasts will depend on the materials, how often you use it, and how well you maintain it.
Is a mandibular splint suitable for everyone who snores?
Not always. You’ll need a clinical assessment to work out whether your snoring is an isolated issue or linked to more complex sleep-disordered breathing.
