Not every jaw or bite problem requires surgery. Many dental problems can be corrected with orthodontic treatment alone, while others are caused by the position or development of the jawbones themselves. When the underlying problem is skeletal and cannot be adequately corrected by moving the teeth, corrective jaw surgery may be considered. Corrective jaw surgery, also known as orthognathic surgery, is used to reposition the upper jaw, lower jaw, or both.
If you are trying to understand whether your problem may require jaw surgery, the most important question is not simply how crooked your teeth or jaw appear. It is whether there is a significant skeletal imbalance affecting your bite, function, facial proportions, or other aspects of oral and facial health.
What Is Corrective Jaw Surgery?
Corrective jaw surgery is performed to correct abnormalities in the position or relationship of the jawbones. These abnormalities may develop because the jaws grow at different rates, arise from a condition present from birth, or occur following trauma or certain diseases.
The surgery may involve:
- Upper jaw surgery: Repositioning the maxilla to correct problems involving its position, height, width, or relationship with the lower jaw.
- Lower jaw surgery: Repositioning the mandible to correct an underdeveloped, overdeveloped, or significantly displaced lower jaw.
- Double jaw surgery: Repositioning both jaws when the skeletal discrepancy involves the upper and lower jaws.
The primary objective is to correct the underlying skeletal problem and improve function. Changes in facial appearance can occur as a consequence of repositioning the jaws, but treatment planning considers facial balance alongside the bite and functional outcome.
The Key Question: Can Orthodontics Alone Correct the Problem?
This is one of the most important distinctions in deciding whether corrective jaw surgery is appropriate. Orthodontic treatment can move teeth within the supporting bone. It can correct crowding, spacing, tooth rotations and many bite problems. However, braces cannot reposition a significantly misaligned jawbone in an adult.
For example, if an underbite is primarily caused by the lower jaw being positioned too far forward, orthodontic treatment may be able to move the teeth to improve the bite to a certain extent. But if the underlying skeletal discrepancy is substantial, correcting the teeth alone may not address the fundamental problem.
In such cases, orthodontics and surgery may be used together. Orthodontic treatment prepares the teeth for the planned jaw movements, while surgery corrects the skeletal relationship.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
Signs That Corrective Jaw Surgery May Be Needed
There is no single symptom that automatically means surgery is necessary. Instead, several findings may indicate a significant skeletal discrepancy.
1. A Severe Underbite or Overbite
A pronounced underbite or overbite can occur when the upper and lower jaws do not have an appropriate skeletal relationship. If the discrepancy is primarily skeletal and cannot be adequately corrected through orthodontics, jaw surgery may be considered.
2. An Open Bite
An open bite occurs when some upper and lower teeth do not meet when the mouth is closed. Depending on its cause and severity, an open bite may interfere with biting, chewing and speech. When the problem is associated with the underlying jaw structure, corrective surgery may form part of treatment.
3. Significant Facial Asymmetry
A jaw that is significantly shifted, tilted or rotated can make one side of the face appear different from the other. When the asymmetry originates from the facial skeleton rather than only the teeth or soft tissues, surgical repositioning of one or both jaws may be considered.
4. Difficulty Chewing or Biting
A significant skeletal discrepancy can interfere with the way the teeth come together and how the jaw moves during chewing. Difficulty biting or chewing food may therefore be one reason for a detailed orthognathic assessment.
5. Difficulty Keeping the Lips Together
In some jaw abnormalities, the lips cannot comfortably meet without muscular strain. This can occur when the underlying relationship between the jaws and facial structures makes normal lip closure difficult.
6. Problems With Speech or Swallowing
Certain dentofacial skeletal abnormalities can contribute to difficulties with speech or swallowing. These symptoms have many possible causes, however, so they need to be assessed in the context of the overall jaw and facial structure.
7. Excessive Tooth Wear
An abnormal bite can place uneven forces on the teeth. Over time, this may contribute to excessive or uneven tooth wear. Whether jaw surgery is appropriate depends on the underlying cause and whether the skeletal discrepancy can be managed adequately through other treatment.
8. A Receding or Protruding Jaw
A lower jaw that sits substantially behind or ahead of the upper jaw may create both functional and facial-balance concerns. When the discrepancy is skeletal and significant, repositioning the jaw may be considered.
9. Certain Breathing Problems
Jaw position can influence the dimensions of the upper airway. In selected patients with obstructive sleep apnea and a suitable skeletal pattern, procedures that advance the jaws may form part of treatment. This is a specialized indication and requires assessment of the airway and the underlying sleep-related breathing disorder rather than relying on facial appearance alone.
When Is Jaw Surgery Usually More Than a Cosmetic Procedure?
Corrective jaw surgery is not limited to people who are concerned about facial appearance. A skeletal jaw discrepancy can affect several aspects of function, including the way the teeth meet, chewing efficiency, jaw movement, swallowing and, in selected cases, breathing.
This is why the decision is usually based on the overall relationship between skeletal structure, teeth and function rather than on facial appearance alone.
At the same time, facial appearance can be a legitimate part of the treatment discussion. Moving the jaws changes the supporting framework of the face and can alter the profile, chin position, smile and facial proportions. These changes should be anticipated during treatment planning rather than treated as an unexpected consequence.
Does Every Severe Bite Problem Require Surgery?
No. The severity of a bite problem does not automatically determine the need for surgery. Some patients with significant-looking dental irregularities can be treated successfully with orthodontics, while a patient with a less obvious dental problem may have a substantial skeletal discrepancy underneath it.
Orthodontists and oral and maxillofacial surgeons therefore assess the underlying skeletal relationship, dental compensation, facial proportions and functional effects before recommending surgery.
What Happens If Surgery Is Recommended?
Corrective jaw surgery is usually planned as a coordinated orthodontic and surgical treatment rather than as a single isolated procedure.
In the conventional approach, orthodontic treatment may be performed before surgery to position the teeth appropriately. This can temporarily make the bite appear different or even more noticeable because the teeth are being prepared for the final skeletal correction.
The surgeon then repositions the jaw or jaws according to the treatment plan. After the bones have healed sufficiently, orthodontic treatment may continue to refine the bite and establish the final tooth relationship.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
Some appropriately selected patients may be considered for a surgery-first approach, in which jaw surgery is performed before the main phase of orthodontic treatment. However, this is not suitable for everyone, and patient selection and treatment planning are important.
What About Age and Jaw Growth?
Corrective jaw surgery is generally considered after the facial bones have reached sufficient skeletal maturity because the procedure is intended to reposition an established jaw structure.
The exact timing varies between individuals and depends on growth, the severity of the discrepancy, orthodontic needs and overall treatment planning. Adolescents with significant jaw abnormalities may be monitored while growth continues, although the appropriate timing must be determined individually.
Adults can also undergo orthognathic surgery when they have a suitable skeletal and dental problem and are otherwise appropriate candidates for treatment.
What Are the Benefits and Risks?
When appropriately indicated, corrective jaw surgery can improve the relationship between the jaws and teeth and may improve functions such as chewing and speech. It can also produce changes in facial balance because the facial skeleton provides support for the surrounding soft tissues.
However, it is major surgery and does not come without risks. Possible complications include infection, bleeding, altered sensation, changes in the bite, relapse of jaw position, temporomandibular joint symptoms and problems involving fixation plates or screws.
Altered sensation is particularly relevant with procedures involving the lower jaw. Sensory changes may improve over time, although some patients can experience persistent changes.
Recent evidence involving 65 studies and 6,482 patients found that orthognathic surgery generally produced meaningful skeletal and functional improvements, while also showing that complications and sensory disturbances can occur. The review found that most neurosensory changes improved within 12 months, although a smaller proportion persisted. These figures represent pooled research populations and should not be interpreted as an individual patient's predicted outcome.
What Does Recovery Involve?
Recovery varies according to the type and extent of surgery. Swelling, altered sensation and difficulty eating are common during the early postoperative period. The jawbones continue healing after the initial recovery period, and the bite may be monitored and refined through follow-up orthodontic treatment.
Initial bone healing takes several weeks, but complete skeletal healing and final tissue adaptation take longer. The visible appearance of the face also changes gradually as postoperative swelling decreases.
Because recovery is not limited to the first few weeks, regular follow-up is important for monitoring healing, bite stability and the overall treatment result.
The Bottom Line
Corrective jaw surgery is generally considered when a significant problem comes from the underlying jawbones and cannot be adequately corrected with orthodontic treatment alone. Severe skeletal bite discrepancies, open bite, significant facial asymmetry, difficulty chewing, certain swallowing or speech problems, and selected airway-related conditions may all warrant an orthognathic evaluation.
The decision is not based on one symptom or a single measurement. It involves examining the jaws, teeth, facial proportions and function together and determining whether the expected benefits of skeletal correction justify the risks and recovery involved.
For some people, orthodontics is enough. For others, the most appropriate treatment is coordinated orthodontics and corrective jaw surgery. A detailed assessment by an orthodontist and oral and maxillofacial surgeon helps establish which approach fits the underlying problem.
