Orthognathic and Cranio-Maxillofacial Deformity

Overview

Orthognathic and Cranio-Maxillofacial Deformity care is a specialised service under the Institute of Cranio Maxillo Facial Surgery that focuses on correcting jaw, facial bone, and craniofacial deformities. These conditions may affect chewing, speech, breathing, facial balance, dental bite, jaw movement, and appearance.

Treatment often requires careful planning between maxillofacial surgeons, orthodontists, dentists, anaesthesiologists, radiologists, speech therapists, and other specialists. The aim is to improve both function and facial harmony.

What Is Orthognathic and Cranio-Maxillofacial Deformity Care?

Orthognathic surgery, also called corrective jaw surgery, corrects misalignment of the upper jaw, lower jaw, chin, or facial bones. Cranio-maxillofacial deformity care includes treatment for congenital, developmental, traumatic, or acquired deformities of the skull, face, jaws, and related soft tissues.

Common conditions treated include:

• Upper jaw or lower jaw imbalance

• Underbite, overbite, open bite, or crossbite

• Facial asymmetry

• Receding or prominent chin

• Difficulty chewing due to jaw misalignment

• Speech or swallowing concerns related to jaw structure

• Obstructive sleep apnoea related to jaw anatomy in selected cases

• Cleft-related jaw deformities

• Craniofacial deformities present from birth

• Post-traumatic facial deformity

• Facial deformity after tumour surgery or infection

Causes and Risk Factors

Jaw and craniofacial deformities may be present from birth, develop during growth, or occur after injury or disease.

Common causes and risk factors include:

• Abnormal jaw growth during childhood or adolescence

• Genetic or inherited facial growth patterns

• Cleft lip and palate

• Craniofacial syndromes

• Facial trauma

• Previous surgery affecting facial growth

• Tumours or cysts involving facial bones

• Infection causing bone or soft tissue damage

• TMJ disorders affecting jaw position in selected cases

• Long-standing bite problems not correctable with orthodontics alone

Early evaluation is helpful, especially in children and adolescents with facial growth differences or bite concerns.

Symptoms

Patients may seek evaluation when jaw or facial structure affects function, comfort, or appearance.

Common symptoms include:

• Difficulty chewing or biting food

• Teeth not meeting properly

• Jaw pain or fatigue while chewing

• Speech difficulty related to jaw position

• Mouth breathing or sleep-related breathing concerns

• Difficulty closing the lips comfortably

• Facial imbalance or asymmetry

• Receding or protruding jaw

• Excessive gum show while smiling

• Open bite or crossbite

• Chronic TMJ discomfort

• Reduced confidence due to facial imbalance

Urgent care is needed if jaw deformity is related to recent trauma, breathing difficulty, rapidly increasing swelling, infection, severe pain, or inability to open or close the mouth.

Diagnosis

Diagnosis requires a detailed facial, dental, bite, airway, and jaw-function assessment. Since treatment often involves both teeth and bones, orthodontic planning is usually essential.

Common diagnostic methods include:

• Facial and jaw examination

• Bite and dental occlusion assessment

• Dental impressions or digital scans

• X-rays and cephalometric analysis

• CT scan or 3D imaging for surgical planning

• Photographic facial analysis

• Airway assessment in selected sleep-related cases

• TMJ evaluation when jaw pain or movement issues are present

• Orthodontic assessment before and after surgery

• Virtual surgical planning in selected complex cases

A personalised treatment plan is made after evaluating facial proportions, bite correction needs, airway, patient age, and overall health.

Treatment Options

Treatment depends on the type of deformity, severity, age, dental alignment, function, and patient goals.

Care may include:

• Orthodontic treatment before surgery

• Upper jaw surgery, also called maxillary osteotomy

• Lower jaw surgery, also called mandibular osteotomy

• Chin surgery or genioplasty

• Bimaxillary surgery involving both jaws

• Correction of facial asymmetry

• Cleft-related jaw deformity correction

• Distraction osteogenesis in selected craniofacial conditions

• Bone grafting or contour correction when needed

• Post-surgical orthodontics for final bite alignment

• Speech therapy, diet guidance, and rehabilitation in selected cases

Most corrective jaw surgeries are performed under general anaesthesia. Incisions are often placed inside the mouth, which helps reduce visible scarring.

Prevention and Outlook

Not all cranio-maxillofacial deformities can be prevented, especially congenital or genetic conditions. However, early dental and facial growth assessment can help detect problems sooner. Timely orthodontic and surgical planning may reduce functional problems and improve long-term outcomes.

The outlook is generally good when treatment is carefully planned and performed by an experienced multidisciplinary team. Recovery takes time and may involve swelling, soft diet, oral hygiene care, orthodontic follow-up, and gradual return to normal activities. Complete bone healing may take several months.

Frequently Asked Questions

1. What is orthognathic surgery?
   Orthognathic surgery is corrective jaw surgery that repositions the upper jaw, lower jaw, chin, or facial bones to improve bite, function, and facial balance.

2. Is jaw surgery only cosmetic?
   No. The main goal is usually functional improvement, including chewing, bite alignment, speech, breathing, and jaw balance. Appearance may also improve as part of the correction.

3. Will I need braces before jaw surgery?
   Many patients need orthodontic treatment before and after surgery to align the teeth properly with the corrected jaw position.

4. How long does treatment take?
   Treatment may take months to a few years, especially when orthodontics is required before and after surgery.

5. Will there be visible scars?
   Many orthognathic procedures are done through incisions inside the mouth, so visible facial scars are often avoided. Some complex cases may require external incisions.

6. What is recovery like after jaw surgery?
   Recovery usually includes swelling, soft or liquid diet, oral hygiene care, pain control, and follow-up visits. Initial healing may take weeks, while complete bone healing takes longer.