Sleep & breathing
Oral appliance (mandibular advancement) for obstructive sleep apnea
Apnea severity, daytime sleepiness and blood pressure against inactive control and against CPAP.
At a glance
An oral appliance is a mouthpiece made by a dentist. It holds the lower jaw forward at night so the throat stays open. CPAP stopped more breathing pauses. But people wore the mouthpiece for more hours each night. Daytime sleepiness and blood pressure got better by about the same amount on both.
As studied, and the trials
In a crossover of 126 adults, CPAP lowered the apnea-hypopnea index further (4.5 against 11.1 events an hour) while the appliance was worn longer, and sleepiness, driving simulator results and quality of life improved by similar amounts (Phillips et al., Am J Respir Crit Care Med, 2013; PMID 23413266). Against inactive control the appliance lowered systolic pressure about 2 mmHg, the same as CPAP (Bratton et al., JAMA, 2015; PMID 26624827), and Epworth scores 1.7 points, 0.8 less than CPAP (Bratton et al., Lancet Respir Med, 2015; PMID 26497082). Surrogate and self-reported outcomes cap the letter at B.
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A letter describes the human evidence, not the product, the manufacturer, or the intervention's worth.
See the full evidence record →Graded on Apnea severity, daytime sleepiness and blood pressure in obstructive sleep apnea.
Why this letter
Why this gradeThe reasoning, and what the grade does not cover.
Grade B on apnea severity, daytime sleepiness and blood pressure, from a randomized crossover against CPAP (Phillips et al., 2013; PMID 23413266) and two network meta-analyses A study that pools the numbers from several trials into one combined estimate. of randomized trials (Bratton et al., 2015; PMIDs 26624827, 26497082).
WHY NOT Athe outcomes are breathing counts, a questionnaire and blood pressure.
WHAT THIS GRADE DOES NOT COVERcardiovascular events, which no oral appliance trial cited here measured; people without enough healthy teeth to hold the device; and over-the-counter boil-and-bite mouthguards, which the trials did not test.
A grade describes the human evidence for a named use. It is not advice, and it is not a judgment on any individual prescription. How the letters are decided →
Evidence notes: randomized trial, meta-analysis
Endpoint The outcome a trial measures to decide whether the treatment worked, such as heart attacks, blood pressure or a symptom score. graded: Apnea severity, daytime sleepiness and blood pressure in obstructive sleep apnea (surrogate)
Last reviewed: October 2026
The trial that would change this grade.
Positive trials of this shape from independent research groups would move this entry to A.
Why the current trials fall short
The comparison so far rests on breathing counts, questionnaires and blood pressure over weeks to months.
Dose, form and timing
Apnea-hypopnea index on a retest with the appliance in place, the Epworth Sleepiness Scale, and nightly hours of wear.
Safety
Jaw discomfort, tooth movement and bite change are the reported effects of long-term wear. The appliance needs enough healthy teeth to hold it.
Grade history
How this letter has changedLatest: No. 365 · October 2026 · First graded.
Mouthpieces that hold the jaw forward now have a record. CPAP removed more breathing pauses, but the appliance was worn longer and daytime outcomes came out about even (Phillips et al., Am J Respir Crit Care Med, 2013; PMID 23413266); blood pressure fell by about the same amount on both (Bratton et al., JAMA, 2015; PMID 26624827). Grade B, capped by surrogate and self-reported outcomes.PMID 23413266 PMID 26624827
Every change to a letter on this site is dated and published. The full evidence log →
Sources
- Citations
- Every paper cited on this page is matched to its PubMed record on every build.
- Retractions
- None of these papers is retracted or under a journal expression of concern. PubMed is checked again on every build.
- Read against the papers
- October 2026. By a language model (AI-assisted reading), not yet reviewed by a clinician.
- Outside review
- Not yet done. No reviewer outside EBL has checked this record.
What each of these checks can and cannot show: evidence integrity.
Primary evidenceFour papers, each linked to its PubMed record.
Phillips et al. (Am J Respir Crit Care Med, 2013; PMID 23413266): randomized crossover, 126 adults, 1 month on each treatment. Bratton et al. (JAMA, 2015; PMID 26624827): network meta-analysis of 51 randomized trials on blood pressure. Bratton et al. (Lancet Respir Med, 2015; PMID 26497082): network meta-analysis of 67 randomized trials on sleepiness, with possible publication bias noted by the authors. Giles et al. (Cochrane Database Syst Rev, 2006; PMID 16437429): CPAP lowered the apnea-hypopnea index about 8 events an hour more than an oral appliance in crossover trials.
Evidence Based Longevity, Inc. is owner-operated and edited by Arnold Sandlow, D.C., a California-licensed chiropractor. Evidence Based Longevity publishes in English only · Machine translations are not produced or reviewed by EBL for accuracy
How EBL searched for the trials (1 search)
The search that was run, what it returned, and what was left out and why, so the absence of evidence can be checked as well as its presence.
("mandibular advancement"[tiab] OR "oral appliance"[tiab]) AND "sleep apnea"[tiab] AND (randomized controlled trial[pt] OR meta-analysis[pt])Disclosure
Educational use only · Not medical advice · EBL grades published human evidence and does not recommend treatment. Stopping a prescription is a decision for your physician.
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