Can Jaw Surgery Fix Sleep Apnea? Inside Maxillomandibular Advancement

For someone who has struggled with obstructive sleep apnea for years, the idea of undergoing major jaw surgery may sound extreme. Maxillomandibular advancement surgery is certainly not a minor procedure. It involves repositioning both the upper and lower jaws, temporarily changing how a person eats, and allowing several months for the bones and facial tissues to settle.

Yet maxillomandibular advancement is also one of the most effective surgical treatments available for obstructive sleep apnea. Unlike operations that remove or tighten tissue in one part of the throat, this procedure enlarges the breathing passage at several levels. It can create more room behind the soft palate, tongue and lower throat while reducing the tendency of the airway to collapse during sleep.

Research has repeatedly found that approximately 85% of carefully selected patients meet commonly used criteria for surgical success. Complete normalization of the sleep study occurs in a smaller percentage of patients, which is why it is important to understand what doctors mean when they discuss the “success rate” of maxillomandibular advancement surgery. ^[1]

Maxillomandibular advancement surgery is an operation in which the upper jaw, known as the maxilla, and the lower jaw, known as the mandible, are moved forward. It is sometimes described as double-jaw advancement, bimaxillary advancement or orthognathic surgery for sleep apnea.

During the operation, the surgeon makes controlled cuts in the bones of the upper and lower jaws. The movable portions of the jaws are then brought forward and stabilised in their new positions using small titanium plates and screws.

Moving the jaws forward does more than change the position of the facial bones. The tongue, soft palate and several muscles attached to the jaws are also brought forward. This increases tension in the surrounding soft tissues and enlarges the pharyngeal airway through which air travels during sleep.

Because the procedure can affect the airway from the nasal region down to the area behind the tongue, it generally produces a broader airway improvement than a surgery directed only at the tonsils, palate or tongue base. ^[2]

Obstructive sleep apnea occurs when the upper airway repeatedly narrows or closes during sleep. A person may continue trying to breathe, but airflow becomes restricted or stops completely. These events can lower blood oxygen levels and cause repeated brief awakenings that prevent restorative sleep.

The size and stability of the upper airway are influenced by several structures, including:

• The upper and lower jaws
• The tongue and tongue-base muscles
• The soft palate
• The lateral walls of the throat
• Fat and soft tissue surrounding the airway
• The shape of the facial skeleton

In some people, the lower jaw sits farther back than normal. This can leave less space for the tongue and place it closer to the back of the throat. However, a visibly small or recessed jaw is not required to benefit from maxillomandibular advancement. People with apparently normal facial proportions may also have an airway that is too narrow or vulnerable to collapse during sleep.

By bringing the facial skeleton forward, the operation increases the space behind the palate and tongue. It may also make the airway walls less collapsible by placing the attached muscles and soft tissues under greater forward tension. This helps explain why the procedure can work even when the obstruction occurs at more than one level. ^[2]

Maxillomandibular advancement is most often considered for adults with moderate to severe obstructive sleep apnea who have not obtained adequate control with nonsurgical treatment.

Continuous positive airway pressure therapy remains a highly effective treatment when it is used consistently. However, some people cannot tolerate the mask, pressure, dryness, air leakage, noise or sleep disruption associated with treatment. Others continue to have difficulty despite trying different masks and pressure adjustments.

Clinical practice guidelines recommend discussing referral to a sleep surgeon with adults who have obstructive sleep apnea, a body mass index below 40 and an inability or unwillingness to use positive airway pressure therapy. The recommendation is to discuss a surgical consultation—not to assume that every referred patient should undergo surgery. ^[3]

A person may be considered for maxillomandibular advancement when there is:

• Moderate or severe obstructive sleep apnea
• Inability to tolerate positive airway pressure therapy
• Inadequate improvement with an oral appliance
• A small or recessed lower jaw
• A narrow upper airway caused partly by skeletal anatomy
• Obstruction behind both the palate and tongue
• Persistent sleep apnea after previous throat or nasal surgery
• A desire for a treatment that does not require wearing a device every night
• A jaw or bite abnormality that could also benefit from correction

Maxillomandibular advancement is not limited to people who have already undergone several unsuccessful throat operations. It may be considered as a primary surgical option when the anatomy, disease severity and patient’s goals support that approach.^[2]

Not everyone with obstructive sleep apnea is suited to major jaw surgery. The benefits must be weighed against the demands of the procedure and recovery.

Factors that may complicate surgery or make the outcome less predictable include:

• Poorly controlled medical conditions
• Untreated dental or gum disease
• Severe osteoporosis or poor bone quality
• Inability to follow a restricted diet during recovery
• Active smoking or nicotine use that may interfere with healing
• Certain bleeding disorders
• Unrealistic expectations about facial appearance or complete cure
• Obstructive sleep apnea caused predominantly by factors that surgery may not fully correct

Obesity does not automatically rule out surgery. Nevertheless, increasing body weight may contribute to airway narrowing independently of jaw position and may raise the likelihood of residual or recurrent obstructive sleep apnea. For people with a body mass index of 35 or higher who cannot use positive airway pressure therapy, guidelines recommend that bariatric surgical consultation may also be discussed as part of the treatment plan. ^[3]

A thorough evaluation is needed before deciding whether the procedure is appropriate. This usually involves collaboration between a sleep physician, an oral and maxillofacial surgeon, an orthodontist and, in some cases, an ear, nose and throat surgeon.

Sleep Study

The diagnosis and severity of obstructive sleep apnea should be confirmed using objective sleep testing. The sleep study records measures such as breathing interruptions, oxygen levels, snoring and sleep stages.

One of the most important measurements is the apnea-hypopnea index, which represents the average number of complete or partial breathing interruptions occurring per hour of sleep. The preoperative result provides a baseline that can later be compared with a postoperative sleep study.

Airway and Facial Examination

The surgeon examines the facial profile, jaw relationship, dental bite, tongue position, tonsils, palate and nasal airway. Flexible airway examination or drug-induced sleep endoscopy may be used in selected patients to identify where collapse occurs.

Imaging and Digital Surgical Planning

Three-dimensional imaging, dental scans and virtual surgical planning are increasingly used to determine how far each jaw should be moved and whether rotation of the jaw complex would improve the airway and facial balance.

Computer-generated surgical guides and customised plates may help transfer the virtual plan accurately to the operating room. ^[4]

Dental and Orthodontic Assessment

The teeth must fit together appropriately after surgery. Some patients require braces or clear aligners before the operation. Others may need only limited orthodontic preparation or treatment after the bones have healed.

When maxillomandibular advancement is performed primarily for airway improvement, the surgical team must balance several goals: enlarging the airway, maintaining a stable bite and avoiding an unnatural change in facial appearance.

The operation is performed under general anaesthesia in a hospital. The exact technique varies according to the patient’s anatomy and the surgeon’s plan, but the main steps are generally similar.

Repositioning the Upper Jaw

The surgeon reaches the upper jaw through an incision inside the upper lip. A controlled bone cut, commonly based on a Le Fort I osteotomy, separates the tooth-bearing portion of the upper jaw from the upper facial skeleton.

The upper jaw can then be moved forward. In some patients, it may also be rotated or repositioned vertically to improve the airway, bite and facial proportions.

Once the desired position is achieved, the upper jaw is secured with plates and screws.

Repositioning the Lower Jaw

The lower jaw is usually approached through incisions inside the mouth. Bone cuts are made on both sides of the mandible so that the tooth-bearing portion of the jaw can be advanced without disconnecting the jaw joints from the skull.

The lower jaw is moved forward to match the new upper-jaw position and is stabilised with screws or plates.

Stabilising the Bite

The surgeon carefully checks how the upper and lower teeth meet. Temporary dental splints, arch bars or orthodontic elastics may be used to guide the bite and restrict excessive jaw movement while healing begins.

Modern fixation generally means the jaws do not need to be tightly wired shut for the entire recovery period, although elastics are commonly used.

Additional Procedures

Depending on the anatomy, maxillomandibular advancement may be combined with other procedures, such as:

• Advancement of the tongue-muscle attachment
• Chin advancement
• Septoplasty
• Nasal airway surgery
• Removal of enlarged tonsils
• Correction of a narrow upper jaw

These additional procedures are not required for every patient.

The total operating time varies with the complexity of the plan. After surgery, the patient is monitored closely for swelling, bleeding, breathing problems and pain. A hospital stay of approximately two to three days is common, although this may be shorter or longer depending on recovery and local practice. ^[4]

Recovery is gradual. Although most patients resume many ordinary activities within several weeks, the bones, nerves, muscles and facial tissues continue healing for months.

First Few Days

Facial swelling, nasal congestion, bruising, tiredness and discomfort are expected. Swelling usually becomes most noticeable during the first several days and then gradually improves.

The head is generally kept elevated, and cold packs may be recommended during the early recovery period. Pain medication, antibiotics and oral rinses may be prescribed.

Breathing may initially feel more difficult because of swelling and nasal congestion, even though the airway has been surgically enlarged. For that reason, patients are monitored carefully in the hospital.

First Two Weeks

A liquid diet is usually required during the early phase. Meals may include soups, nutritional drinks, milk, yoghurt, blended foods and other liquids recommended by the surgical team.

Speech may feel awkward, and opening the mouth may be limited. Fatigue can be significant. Many patients are surprised by how much energy the body uses during bone healing.

Swelling generally begins to settle during this period, although the face may still look noticeably different. Pain often improves before the swelling disappears completely.

A first postoperative appointment is commonly scheduled within 10 to 14 days. The surgeon checks the wounds, bite, dental elastics and signs of infection or healing problems. ^[4]

Weeks Three to Six

Energy levels and facial appearance usually improve. Depending on the surgeon’s instructions, the diet may progress from liquids to puréed foods and then to soft foods that require minimal chewing.

Some people return to desk-based work after three to six weeks. Jobs involving heavy lifting, frequent speaking or physical exertion may require more time away.

Elastics, arch bars or splints may be adjusted or removed as the bite stabilises. The bones are still healing, so hard, crunchy and chewy foods remain restricted.

Around Three Months

Many patients can gradually return to a more normal diet at approximately three months, provided imaging and examination show satisfactory bone healing.

Jaw-stretching exercises or physical therapy may be recommended if mouth opening remains limited. Residual swelling may still be present, particularly around the upper lip, nose and lower jaw.

A repeat sleep study is usually arranged after swelling has sufficiently resolved and sleep patterns have stabilised. Testing too early could underestimate the benefit because postoperative swelling temporarily affects the airway. ^[4]

Six to Twelve Months

Fine changes in facial appearance, sensation and jaw movement may continue for up to a year. Areas of numbness may gradually shrink, and the bite may continue to settle.

This is why surgeons distinguish between returning to normal daily activities and complete recovery. A person may be working and eating relatively normally within a few months while the deeper tissues are still healing. Full recovery may take six to 12 months. ^[4]

Dietary instructions vary, but recovery usually progresses through several stages.

The early diet is liquid because chewing places stress on the healing jaw bones. Calorie and protein intake are especially important during this phase. Poor nutrition can worsen fatigue and interfere with wound and bone healing.

As healing progresses, the diet may advance to foods such as:

• Smooth porridge
• Mashed potatoes
• Scrambled eggs
• Soft rice
• Well-cooked pasta
• Blended lentils
• Soft fish
• Cottage cheese
• Stewed vegetables
• Finely minced foods

Hard foods, nuts, raw vegetables, tough meat, crusty bread and anything requiring forceful biting should be avoided until the surgeon confirms that the jaw bones are strong enough.

Temporary weight loss is common because eating takes longer and total calorie intake may fall. One academic medical centre advises patients that substantial weight loss can occur during the first three postoperative months. ^[4]

Maxillomandibular advancement has a strong safety record when performed by an experienced surgical team, but it remains a major operation involving the facial bones, nerves, teeth and airway.

Facial and Lip Numbness

Numbness of the lower lip, chin, gums or cheeks is one of the most important side effects. It occurs because sensory nerves travel through or close to the areas where the jaw bones are divided.

Early numbness is common and often improves gradually. Some patients experience altered sensation, tingling or small areas of permanent numbness. A 2025 systematic review emphasised that lower facial numbness should be discussed clearly before surgery, even though most reported postoperative effects were temporary. ^[5]

Bleeding and Infection

Bleeding can occur during or after surgery. Infection may develop around the incisions, plates, screws or bone cuts. Antibiotics and careful oral hygiene help reduce the risk, but they cannot eliminate it entirely.

Changes in the Bite

The upper and lower teeth may not meet exactly as planned after swelling subsides. Orthodontic adjustment is often sufficient, but a significant bite problem may occasionally require another procedure.

Temporomandibular Joint Symptoms

Some patients experience jaw-joint pain, stiffness, clicking or muscle discomfort. Symptoms may be temporary, although people with pre-existing temporomandibular joint problems require careful assessment.

Delayed Bone Healing or Relapse

The jaw bones may heal slowly or fail to unite properly. The advanced position may also partially relapse over time. These problems are uncommon but may require prolonged treatment or revision surgery.

Dental Injury

Teeth, tooth roots and dental nerves can be injured during the bone cuts or fixation. A tooth may rarely lose vitality and require root-canal treatment.

Nasal and Sinus Changes

Advancement of the upper jaw can alter the shape of the nose, nasal airflow and sinus anatomy. The nose may appear slightly wider or more upturned. Some patients notice improved nasal breathing, while others develop congestion or sinus-related symptoms.

Changes in Facial Appearance

Facial change is expected, not necessarily a complication. Moving the jaws forward may produce fuller lips, a stronger jawline and a more prominent midface.

Many patients prefer the postoperative appearance, but satisfaction is subjective. Three-dimensional planning and a detailed discussion of anticipated facial changes are therefore essential. ^[2]

Anaesthesia and Airway Risks

As with any major procedure under general anaesthesia, there are risks involving breathing, medication reactions, blood clots, heart complications and other medical events. Individual risk depends on age, health, sleep apnea severity and associated medical conditions.

Residual or Recurrent Obstructive Sleep Apnea

The operation may substantially improve obstructive sleep apnea without eliminating it. Weight gain, ageing and changes in muscle tone can contribute to persistent or recurrent airway collapse.

A postoperative sleep study is essential even when snoring and daytime sleepiness have disappeared. Symptoms alone cannot confirm that breathing interruptions and oxygen levels have returned to normal.

Reported complication rates differ between studies because researchers do not always define or record complications in the same way. A 2021 analysis estimated a major complication rate of approximately 3.2%, while a newer review of 31 studies reported no major complications or deaths in its included series. These findings suggest that serious events are uncommon, but they do not mean the operation is risk-free. ^[6]

The often-quoted success rate is approximately 85%, but that number needs context.

In sleep-surgery research, “surgical success” commonly means that:

1. The apnea-hypopnea index falls by at least 50%, and
2. The postoperative apnea-hypopnea index is below 20 events per hour.

This definition allows a person to be counted as a success even if mild or moderate obstructive sleep apnea remains.

A 2016 meta-analysis reported surgical success in 85.5% of patients and complete cure in 38.5%. A later comparative meta-analysis calculated a pooled success rate of 85% and a cure rate of 46.3%. ^[1]

“Cure” is usually defined more strictly as a postoperative apnea-hypopnea index below five events per hour. This is why advertisements or articles claiming an 85% cure rate can be misleading. The evidence supports an approximately 85% surgical success rate, not an 85% complete cure rate.

The improvement can be substantial, particularly in people with severe disease.

A 2025 systematic review and meta-analysis involving 31 studies and 1,597 patients found an average reduction in the apnea-hypopnea index of approximately 42 events per hour. The analysis also found improvements in lowest overnight oxygen saturation and daytime sleepiness scores. ^[5]

An earlier large meta-analysis found that 98.8% of patients experienced some improvement after surgery, although not every patient met the formal definition of success or cure. ^[7]

Outcomes vary according to:

• Preoperative sleep apnea severity
• Amount and direction of jaw advancement
• Age
• Body weight
• Airway anatomy
• Previous surgery
• Healing and skeletal stability
• Weight changes after surgery
• The definition used to measure success

Patients with extremely severe obstructive sleep apnea may experience dramatic improvement while still having residual disease. For example, reducing the apnea-hypopnea index from 70 to 12 represents a major clinical response, but it is not a complete cure.

Available evidence suggests that much of the benefit can persist for years.

A long-term meta-analysis found that the average apnea-hypopnea index fell from approximately 65.8 events per hour before surgery to 7.7 events per hour during long-term follow-up. Improvements in sleepiness and oxygen levels were also maintained. ^[8]

However, the apnea-hypopnea index may gradually rise again during very long-term follow-up. This does not necessarily mean that the jaw has moved back. Ageing, weight gain and reduced muscle tone can affect the airway even when the skeletal advancement remains stable.

Long-term studies have also reported sustained improvements in sleep-related quality of life more than a decade after surgery.^[1]

Patients should therefore continue follow-up with a sleep physician, maintain a stable weight and repeat sleep testing if symptoms such as snoring, witnessed pauses, morning headaches or daytime sleepiness return.

Some patients no longer need positive airway pressure therapy after successful surgery. Others have enough improvement that treatment can be used at a lower pressure or becomes easier to tolerate.

A patient should not stop treatment simply because snoring has improved. Positive airway pressure therapy should generally be continued until the treating sleep physician reviews the postoperative sleep study and confirms that it is safe to discontinue or modify treatment.

Even when mild residual sleep apnea remains, a patient may decide with the sleep physician that additional treatment is appropriate. Options may include weight management, positional therapy, an oral appliance or continued positive airway pressure treatment.

The operation can be life-changing for the right patient, particularly when severe obstructive sleep apnea remains uncontrolled because positive airway pressure therapy cannot be used consistently.

Potential advantages include:

• Enlargement of the airway at several levels
• A high likelihood of major improvement
• Results that may last for many years
• No implanted electronic device
• No need to wear an appliance every night if the operation is sufficiently successful
• Possible correction of an associated jaw or bite abnormality

The disadvantages are equally important:

• Major surgery under general anaesthesia
• Significant swelling and temporary dietary restrictions
• Several weeks away from normal activities
• Potential facial and bite changes
• Risk of persistent numbness
• Months of healing
• No guarantee of complete cure

The decision should be based on more than the sleep-study number. It should also consider cardiovascular health, daytime functioning, treatment preferences, facial anatomy, occupation, ability to complete the recovery process and personal tolerance for surgical risk.

Before choosing maxillomandibular advancement surgery, useful questions include:

• How much do you expect to move each jaw?
• Will the jaws also be rotated?
• How will my facial appearance change?
• Will I need orthodontic treatment?
• How many similar sleep-apnea operations do you perform?
• What success rate do you achieve in patients with anatomy like mine?
• How do you define surgical success and cure?
• What is your rate of permanent lower-lip or chin numbness?
• How long will I need a liquid or soft diet?
• When can I return to work, exercise and driving?
• When will a postoperative sleep study be performed?
• What treatment will be recommended if sleep apnea remains?

A surgeon should be able to explain both the expected airway improvement and the limitations of the procedure without promising a guaranteed cure.

Is maxillomandibular advancement the same as ordinary jaw surgery?

The bone-cutting techniques are similar to those used in orthognathic surgery for jaw misalignment. However, when the operation is performed for obstructive sleep apnea, the planning places particular emphasis on enlarging and stabilising the upper airway.

Does the surgery permanently change the face?

Yes. Because both jaws are moved forward, some degree of permanent facial change is expected. The extent depends on the amount and direction of advancement. Swelling can make the early change look more dramatic than the final result.

Is maxillomandibular advancement surgery painful?

Most patients experience significant discomfort, tightness and pressure rather than severe sharp pain. Swelling, congestion, numbness, fatigue and dietary limitations may be more troublesome than pain itself.

Are the jaws wired shut?

Not always. Plates and screws provide rigid fixation, and many surgeons use orthodontic elastics rather than tightly wiring the jaws together. Practices vary according to the procedure and the stability of the bite.

How long should someone take off work?

Many patients require approximately three to six weeks away from work. Recovery may be longer for physically demanding jobs or roles that require extensive speaking, travel or public-facing activity.

Can sleep apnea return after successful jaw advancement?

Yes. Weight gain, ageing and changes in airway muscle tone may cause sleep apnea to recur or worsen years later. New or returning symptoms should be evaluated with repeat sleep testing.

Maxillomandibular advancement surgery treats obstructive sleep apnea by moving both jaws forward and enlarging the airway behind the palate and tongue. It is one of the most effective surgical options available, particularly for people with moderate to severe obstructive sleep apnea who cannot obtain adequate control with positive airway pressure therapy.

Approximately 85% of patients meet commonly used criteria for surgical success. Complete normalization of the sleep study occurs in roughly 38% to 46%, depending on the study population and definition used. These figures make maxillomandibular advancement highly effective, but they do not make it a guaranteed cure.

The operation requires careful planning, an experienced multidisciplinary team and a willingness to accept several weeks of restricted eating and several months of healing. Patients must also consider possible facial changes, numbness, bite problems and residual sleep apnea.

For a well-selected patient who understands both the benefits and the limitations, maxillomandibular advancement can provide a substantial and durable improvement in nighttime breathing, daytime alertness and overall quality of life.