What Is Jaw Misalignment?

Jaw misalignment, also known as skeletal malocclusion, is when the upper and lower jaws don’t fit together properly, causing functional and aesthetic problems. It often results in a protruding or receding jaw, asymmetry, or open bite.

Common issues include:

• Protruding mouth (bimaxillary protrusion)
• Underbite (lower jaw sticks out)
• Overbite (upper jaw overly forward)
• Facial asymmetry
• Difficulty chewing or speaking clearly
• TMJ (jaw joint) discomfort

Mild cases may be managed with orthodontics, but severe skeletal problems require surgical correction—and that’s where Two-Jaw Surgery comes in.

What Is Two-Jaw Surgery?

Two-Jaw Surgery (also known as Bimaxillary Osteotomy or Double Jaw Surgery) is a comprehensive facial bone surgery that repositions both the upper jaw (maxilla) and lower jaw (mandible) to correct skeletal misalignment and improve facial harmony.

At Seoul Cheil Plastic Surgery, Two-Jaw Surgery is performed with precision and care, combining advanced surgical techniques with an artistic eye for beauty. The procedure involves:

• Le Fort I osteotomy to reposition the upper jaw
• Bilateral sagittal split osteotomy (BSSO) for the lower jaw
• Precise bone movements to correct protrusion, asymmetry, or bite issues
• Surgery time: approximately 3 to 5 hours under general anesthesia
• Internal fixation with plates and screws for long-lasting stability
• Careful nerve preservation to minimize risk of numbness

The result is a balanced, proportionate face—achieving both functional and aesthetic improvements.

ction?

Jaw repositioning can impact overall facial shape. For a harmonious result, Two-Jaw Surgery is often performed alongside:

• Genioplasty to refine chin position and projection
• Cheekbone reduction for slimmer facial width
• Fat grafting to restore volume in key areas
• Rhinoplasty for nose reshaping after skeletal adjustment

This comprehensive approach ensures a natural, balanced outcome that looks great from every angle.

Key Characteristics of Jaw Misalignment

• Protruding mouth or underbite/overbite
• Difficulty closing lips naturally
• Long or short lower face
• Asymmetrical face shape
• Functional issues like chewing or speaking problems
• Gummy smile or excessive tooth display
• Jaw joint (TMJ) discomfort

Can Braces Alone Fix It?

In cases of true skeletal imbalance, orthodontics alone cannot reposition the jawbone. While braces align the teeth, they cannot solve the underlying bone structure.
For moderate to severe cases, Two-Jaw Surgery is the only solution for long-lasting, functional, and aesthetic improvement.

Two-Jaw Surgery at Seoul Cheil Plastic Surgery

Seoul Cheil Plastic Surgery is a trusted leader in facial bone contouring and orthognathic surgery, offering:

• Over 20 years of expertise in jaw surgeries
• Customized surgical plans for each unique facial structure
• Advanced 3D imaging for precision planning
• Scar-free techniques with intraoral incisions
• Multilingual support for international patients



If you’ve been struggling with jaw alignment issues, Two-Jaw Surgery at Seoul Cheil Plastic Surgery can help you achieve the balanced, confident smile you deserve—improving both function and appearance.

Book your consultation today and let’s transform your profile into one you love!