Oral-Appliance Therapy

Professional Explanation

Oral-appliance therapy uses a custom-fitted device worn in the mouth during sleep. The most common type is the mandibular advancement device (MAD), which holds the mandible in a protruded position. This anterior repositioning increases the posterior airway space by drawing the tongue and soft tissues forward, reducing the likelihood of pharyngeal collapse.

Tongue-retaining devices hold the tongue in a forward position through suction, but mandibular advancement devices are more commonly used in current practice.

Indications: Oral-appliance therapy may be considered for patients with mild-to-moderate obstructive sleep apnea, particularly those who cannot tolerate or prefer not to use PAP therapy. Patient selection depends on OSA severity, anatomical suitability, dental health, jaw function, and the absence of contraindications.

Contraindications and limitations include:

• Insufficient healthy dentition to anchor the device.

• Active periodontal disease or significant dental problems.

• Temporomandibular joint (TMJ) disorders.

• Limited jaw protrusion or range of motion.

• Severe OSA where PAP is the recommended first-line treatment per current guidelines.

• Inability to breathe comfortably through the nose.

The dental pathway: A qualified dental professional evaluates the patient, takes impressions or digital scans, fabricates the custom device, fits it, and provides follow-up adjustments. The sleep technologist does not perform these tasks.

Side effects: Common side effects include dental discomfort, jaw soreness, excessive salivation or dry mouth, occlusal changes over time, and device dislodgment during sleep. Most side effects are mild and temporary, but long-term occlusal changes require monitoring.

Follow-up: After oral-appliance therapy is initiated, a follow-up sleep study — either attended polysomnography or home sleep apnea testing per applicable guidance — is typically recommended to assess treatment effectiveness. Symptom improvement does not guarantee that respiratory events are adequately controlled. The device may require adjustment to optimize efficacy.

Technologist role during PSG: If a patient uses an oral appliance during an attended PSG, the technologist documents the device, notes any reported discomfort or dislodgment, and does not adjust the appliance. Any concerns about device fit or effectiveness are escalated to the supervising clinician.

ELI-10

An oral appliance is like a custom mouth guard that moves your lower jaw slightly forward while you sleep. Moving the jaw forward pulls the tongue forward too, which opens up more space in the back of your throat. It is like making a tunnel wider so air can flow through more easily. But it only works if your teeth and jaw are healthy enough to hold it, and you need a dentist to make one that fits you. It is not the right tool for every person or every type of breathing problem.

ELI Example

Think of your throat like a hallway that sometimes gets too narrow when you sleep. PAP therapy is like a fan that blows the hallway open. An oral appliance is like wearing a special retainer that pulls the walls of the hallway a little wider from the inside. It is more comfortable for some people than having a fan, but it does not work if the hallway is too narrow to begin with. And just like braces, it needs a dental professional to make it and check that it fits correctly.

Do Not Confuse

• Oral appliances reposition the mandible; they do not provide positive airway pressure.

• PAP intolerance is a common reason to consider an oral appliance, but the appliance must still be appropriate for that patient.

• Symptom improvement does not prove adequate control of respiratory events.

• The technologist does not adjust the appliance during a sleep study.

High-Yield Memory Anchors

• MAD = mandible forward, airway wider.

• Dental evaluation is required, not optional.

• Follow-up sleep testing verifies effectiveness.

• Technologist documents; dentist prescribes and adjusts.

Chapter Recap

Oral-appliance therapy uses a custom mandibular advancement device to increase upper-airway space. It is indicated for appropriate candidates with mild-to-moderate OSA, particularly those who cannot tolerate PAP. A qualified dental evaluation, device fitting, and follow-up sleep testing are essential components of care. The technologist’s role is documentation during PSG.

CHAPTER 10

Common Mistakes

• Assuming oral appliances work for all severities of OSA.

• Thinking a dental evaluation is optional.

• Believing follow-up testing is unnecessary if the patient feels better.

• Recommending an oral appliance without considering dentition or jaw health.

Safety and Scope

The sleep technologist documents oral-appliance use during PSG. Prescribing, fabricating, fitting, and adjusting oral appliances are outside the technologist’s scope and require qualified dental professionals.