A balanced smile is about more than straight teeth. The position and alignment of your upper and lower jaws can significantly affect your bite, facial appearance, speech, chewing, and even breathing. When jaw abnormalities cannot be corrected with orthodontic treatment alone, orthognathic surgery may be recommended.
Also known as corrective jaw surgery, orthognathic surgery is performed to correct skeletal and dental irregularities involving the jaws. It can improve both function and facial balance while helping patients achieve a healthier, more harmonious smile.
In this complete guide, we’ll explain what orthognathic surgery is, who may need it, the benefits, treatment process, recovery, and what you can expect from the procedure.
What Is Orthognathic Surgery?
Orthognathic surgery is a specialized surgical procedure used to correct abnormalities in the position, size, or shape of the upper jaw, lower jaw, or both.
While orthodontic treatment such as braces or clear aligners can move teeth, it cannot reposition the underlying jawbone. If the problem is primarily skeletal, corrective jaw surgery may be necessary.
Orthognathic surgery is usually performed by an oral and maxillofacial surgeon, often working together with an orthodontist. Treatment is carefully planned using dental records, photographs, X-rays, and three-dimensional imaging when appropriate.
The goal is not simply to improve appearance. Corrective jaw surgery is primarily designed to improve jaw function, bite alignment, and overall oral health.
Who May Need Orthognathic Surgery?
Orthognathic surgery may be considered for people with significant jaw or bite problems that cannot be adequately treated with orthodontics alone.
Common conditions that may require corrective jaw surgery include:
- Severe overbite or underbite
- Open bite
- Significant crossbite
- Facial asymmetry
- Protruding or recessed jaw
- Difficulty chewing or biting
- Problems with speech related to jaw structure
- Certain jaw-related breathing problems
- Difficulty closing the lips comfortably
- Excessive wear on the teeth caused by an abnormal bite
Some patients may also seek treatment because their jaw imbalance has a noticeable effect on facial proportions.
Your oral and maxillofacial surgeon and orthodontist will determine whether surgery is appropriate based on your individual anatomy, symptoms, dental alignment, and treatment goals.
Common Types of Orthognathic Surgery
The type of surgery depends on which part of the jaw requires correction.
1. Maxillary Surgery
Maxillary osteotomy involves repositioning the upper jaw. It may be used to correct problems such as an open bite, crossbite, excessive or insufficient upper-jaw development, or certain facial imbalances.
The upper jaw can be moved forward, backward, upward, downward, or rotated depending on the treatment plan.
2. Mandibular Surgery
Mandibular surgery corrects the position of the lower jaw. It may be recommended for significant underbites, overbites, or other jaw discrepancies.
The lower jaw can be repositioned to improve the relationship between the upper and lower teeth.
3. Double Jaw Surgery
Some patients have abnormalities involving both jaws. In these cases, double jaw surgery, also called bimaxillary surgery, may be performed.
This allows the surgeon to reposition both the upper and lower jaws to achieve improved bite function and facial balance.
What Are the Benefits of Orthognathic Surgery?
Corrective jaw surgery can provide both functional and aesthetic benefits.
Improved Bite and Chewing
One of the primary goals is to establish a healthier relationship between the upper and lower teeth. Improved alignment can make biting and chewing more comfortable and efficient.
Better Facial Balance
Changing the position of the jaws can improve overall facial proportions. Patients may notice improvements in their profile, chin position, and symmetry.
Improved Speech in Certain Cases
Jaw abnormalities can sometimes contribute to speech difficulties. Correcting the underlying skeletal problem may help improve speech function in appropriate patients.
Easier Oral Hygiene
When the teeth and jaws are properly aligned, maintaining good oral hygiene may become easier. Improved alignment can also help reduce abnormal stress and wear on certain teeth.
Improved Quality of Life
For patients experiencing significant functional difficulties, correcting the underlying jaw problem may make everyday activities such as eating, speaking, and social interaction more comfortable.
What Is the Orthognathic Surgery Process?
Orthognathic treatment is usually a carefully coordinated process rather than a single appointment.
Step 1: Initial Evaluation
Your surgeon and orthodontist will examine your teeth, jaws, facial structure, and bite. Diagnostic records such as photographs, X-rays, dental models, and 3D scans may be used to understand your jaw relationship.
Step 2: Orthodontic Preparation
Many patients require braces or another orthodontic treatment before surgery. The teeth are gradually positioned so that the jaws can be properly aligned during surgery.
It is important to understand that your bite may temporarily look different during this stage. This is often part of preparing the teeth for the final surgical correction.
Step 3: Surgical Planning
Once orthodontic preparation is complete, detailed surgical planning is performed. Advanced digital imaging and computer-assisted planning may be used to determine the desired jaw movements.
Step 4: Surgery
Orthognathic surgery is generally performed under general anesthesia. The surgeon accesses the jaw through incisions, typically inside the mouth, and carefully repositions the jawbones.
Small plates and screws are commonly used to stabilize the repositioned bones while healing takes place.
Step 5: Recovery and Follow-Up
After surgery, patients require a period of healing and regular follow-up appointments. Orthodontic treatment may continue after surgery to fine-tune the bite.
What Is Recovery Like?
Recovery varies depending on the type and extent of surgery and the individual patient.
Swelling, bruising, jaw stiffness, and temporary changes in sensation can occur after surgery. Swelling is generally most noticeable during the early recovery period and gradually improves.
Your surgeon will provide detailed instructions regarding:
- Diet and nutrition
- Oral hygiene
- Physical activity
- Medication
- Follow-up appointments
- Jaw exercises, when appropriate
A soft or liquid diet may be recommended initially. As healing progresses, patients can gradually return to a more normal diet according to their surgeon’s instructions.
Although many patients begin returning to normal daily activities within several weeks, complete bone healing takes longer. Your surgical team will monitor your progress throughout recovery.
Are There Risks?
As with any major surgical procedure, orthognathic surgery has potential risks. These can include infection, bleeding, swelling, changes in sensation, nerve-related numbness, bite changes, or problems with bone healing.
The specific risks depend on the procedure and individual circumstances.
A thorough consultation with your oral and maxillofacial surgeon is essential. Your surgeon can explain the potential benefits and risks and help you understand what is realistic for your particular situation.
Is Orthognathic Surgery Right for You?
Orthognathic surgery is not necessary for every bite or jaw problem. Many dental alignment issues can be treated successfully with orthodontics alone.
However, when the underlying problem involves the position or structure of the jaws, surgery may provide a solution that braces or aligners cannot achieve on their own.
The best way to determine whether you are a candidate is to undergo a comprehensive evaluation by a qualified oral and maxillofacial surgeon and orthodontist.
Final Thoughts
Orthognathic surgery can do much more than improve the appearance of a smile. By correcting significant jaw and bite abnormalities, it can improve chewing, oral function, facial balance, and overall quality of life.
Treatment typically involves close collaboration between an orthodontist and oral and maxillofacial surgeon, with detailed planning before surgery and orthodontic refinement afterward.
If you have a severe overbite, underbite, open bite, facial asymmetry, difficulty chewing, or another significant jaw-related concern, consider discussing your options with a qualified specialist. A comprehensive evaluation can help determine whether orthognathic surgery could be the right step toward a healthier, more functional, and balanced smile.