Question explored with the scientific record
Is marpe worth the risk for OSA ?
For mild-to-moderate OSA, a mandibular advancement device (MAD) is a reasonable option that improves symptoms but comes with real, permanent dental side effects. It is not a cure.
The evidence shows MADs work, but modestly. A 2002 study found the apnea-hypopnea index (AHI) dropped from about 20 to 7 events per hour, with just over half of patients responding [1]. A 2019 review confirms CPAP is more effective at reducing AHI, but the difference in daytime sleepiness between the two is not significant [2]. A 2025 sham-controlled trial found MAD therapy reduced subjective sleepiness, especially at wake-up and before lunch, but also reported significantly more side effects like jaw pain and tooth discomfort [3].
The real cost is long-term dental changes. A 2019 study with an average follow-up of 12.6 years found MAD use causes permanent tooth movement: upper incisors tilt backward by about 6 degrees, lower incisors tilt forward by about 8 degrees, and the bite changes [4]. These are not trivial. They are structural changes to your teeth and jaw that do not reverse.
| Outcome | MAD | CPAP | Sham |
|---|---|---|---|
| AHI reduction (events/hr) | ~13 drop [1] | ~25 drop [5] | Minimal |
| Daytime sleepiness improvement | Yes, modest [3] | Similar [2] | No |
| Long-term dental changes | Permanent [4] | None | None |
| Side effects (jaw pain, etc.) | Common [3] | Mask discomfort | Minimal |
My call: MAD is worth trying for mild-to-moderate OSA if you accept the trade-off of permanent dental changes for symptom relief. It is not worth it if you expect a cure or if you are unwilling to accept structural changes to your teeth. Confidence: moderate — the evidence on symptom relief is decent, but long-term safety data on dental changes is thin and comes from small studies.
Sources used 5
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MRI of the pharynx and treatment efficacy of a mandibular advancement device in obstructive sleep apnoea syndrome
This study evaluates the clinical and polysomnographic efficacy of a mandibular advancement device (MAD) in treating obstructive sleep apnoea syndrome (OSAS) and suggests that airway patency during the Muller manoeuvre may predict treatment success.
DOI: 10.1183/09031936.02.00268902 -
Oral appliances for obstructive sleep apnea
This article reviews indications, efficacy, safety, and multidisciplinary management of oral appliances (OAs) for adult obstructive sleep apnea (OSA), comparing OA therapy with CPAP, discussing design features and predictors of success, adverse effects, and the role of dentists …
DOI: 10.1016/j.ejwf.2019.01.001 -
Daytime sleepiness estimated using the Karolinska Sleepiness Scale during mandibular advancement device therapy for snoring and sleep apnea: a secondary analysis of a randomized controlled trial
Mandibular advancement device therapy reduces daytime sleepiness in snorers with obstructive sleep apnea, especially at wake-up and before lunch, as measured by serial Karolinska Sleepiness Scale assessments in a randomized sham-controlled trial.
DOI: 10.1007/s11325-025-03264-9 -
Long-term side effects of sleep apnea treatment with oral appliances: nature, magnitude and predictors of long-term changes
This study investigates the long-term dental and skeletal side effects of oral appliance therapy for obstructive sleep apnea, revealing significant dental changes but negligible skeletal alterations over an average follow-up of 12.6 years.
DOI: 10.1016/j.sleep.2018.12.012 -
Comparison of effects of OSA treatment by MAD and by CPAP on cardiac autonomic function during daytime
A randomized two-period crossover trial in adults with obstructive sleep apnea compared mandibular advancement device (MAD) and continuous positive airway pressure (CPAP) over 12 weeks each, showing both therapies markedly reduce respiratory events and daytime diastolic blood pr…
DOI: 10.1007/s11325-015-1265-0