What Orthognathic Surgery Is (and Is Not)
양악수술 (yangak susul — double jaw surgery, clinically termed bimaxillary osteotomy) is a skeletal surgery, not a soft-tissue or surface procedure. The surgeon cuts the maxilla (upper jaw) using a LeFort I osteotomy — a horizontal bone cut above the tooth roots — and cuts the mandible (lower jaw) using a bilateral sagittal split osteotomy (BSSO), which splits the lower jaw along both sides. Both jaws are then moved to a precisely planned new position and fixed with titanium plates and screws.
The goal of this repositioning is to correct the relationship between the two jaws — how they sit relative to each other and to the skull base. When the upper and lower teeth cannot meet properly because the bones are misaligned, braces can straighten teeth within each jaw but cannot move the jaw itself. Orthognathic surgery closes that gap.
What orthognathic surgery is not: it is not jaw reduction (bone shaving for width), not chin surgery (genioplasty), and not a cheekbone reduction. Each of these addresses a different anatomical structure and a different aesthetic or functional concern. Conflating them leads to mismatched expectations and, in some cases, unnecessary surgery.
Surgeons performing orthognathic surgery in Korea must hold board certification from the 대한성형외과학회 (Daehan Seonghyeong Oegwa Haghoe), the Korean Society of Plastic and Reconstructive Surgeons (KSPRS).¹ Board certification requires six years of medical school, a four-year plastic surgery residency, and passage of KSPRS board examinations.² Patients can verify a surgeon’s certification directly on the KSPRS public registry.³
Orthognathic Surgery vs Jaw Reduction: The Key Difference
The single most common confusion among patients researching jaw surgery in Korea is treating orthognathic surgery and jaw reduction as interchangeable options for “a smaller jaw.” They are not. They address different anatomical problems, carry different risks, require different preparation, and produce different outcomes.
Orthognathic surgery changes jaw position — where the jaw sits in three-dimensional space relative to the skull and the opposing jaw. Jaw reduction (mandibuloplasty — bone removal from the mandible’s outer cortex) changes jaw shape — specifically, the width and squareness of the lower jaw angle — without moving the jaw forward, back, up, or down.
A patient with a normal bite and a wide, square jaw does not need orthognathic surgery. A patient with an underbite, overbite, open bite, or significant skeletal facial asymmetry cannot correct that condition with jaw reduction alone.
| Procedure | What it moves or changes | Bite affected | Orthodontic prep needed | Typical recovery |
|---|---|---|---|---|
| Orthognathic — bimaxillary (양악수술) | Repositions both maxilla and mandible in 3D space | Yes — corrects skeletal bite discrepancy | Yes — typically 12–18 months pre-surgery | Liquid diet 4–6 weeks; swelling 3–6 months; numbness up to 18 months |
| Single jaw — LeFort I (upper) or BSSO (lower) only | Repositions one jaw only to correct a single-jaw discrepancy | Yes — changes occlusal relationship | Yes — typically 12–18 months pre-surgery | Similar to bimaxillary; slightly shorter overall recovery |
| Jaw reduction — mandibuloplasty | Removes outer cortex bone to narrow mandible width and angle | No — jaw position and bite unchanged | No — bite must be stable before surgery | Soft diet 2–4 weeks; swelling 2–3 months; numbness 3–6 months |
| Genioplasty (chin osteotomy) | Cuts and repositions the chin segment only | No — chin moves independently of occlusal plane | No in most cases | Soft diet 2–3 weeks; swelling 1–3 months |
Genioplasty — cutting and repositioning the chin segment — is frequently combined with orthognathic surgery or jaw reduction to refine the lower face profile. It changes chin position without affecting the bite or the main jaw structure.
Why Korea Performs Orthognathic Surgery at High Volume
Korea performs orthognathic surgery at a volume that is disproportionate relative to its population when compared with Western countries. Several factors explain this.
Surgical specialization and technique refinement. Concentrated case volume in Gangnam’s medical district has produced surgeons with high orthognathic case throughput. High volume correlates with refined technique, faster operating times, and familiarity with complications — though volume alone is not a proxy for appropriateness of indication.
Aesthetic application beyond functional correction. Korean surgeons routinely perform orthognathic surgery on patients with clinically normal bite function when the patient’s aesthetic goal — facial lengthening, increased facial projection, correction of mild asymmetry — cannot be achieved with less invasive procedures. This aesthetic-first application is uncommon outside East Asia and is a direct driver of higher case numbers. As of 2024, approximately 2,100 board-certified plastic surgeons are registered with KSPRS in Korea,⁴ and orthognathic surgery sits within the scope of both plastic surgeons and oral and maxillofacial surgeons.
Cultural and market factors. Strong cultural emphasis on facial harmony, a well-developed medical tourism infrastructure, and clinic pricing that makes major jaw surgery accessible to a broader patient base — typical costs in Korea range from approximately ₩15–35M (≈$11,000–26,000 USD / ≈$17,000–40,000 AUD; FX indicative as of July 2026) — all sustain demand. These prices are significantly below equivalent surgery in Australia or the United States.
Important caveat: high surgical volume does not resolve the question of whether aesthetic-indication orthognathic surgery is appropriate for a specific patient.
Candidacy and Significant Risks
Appropriate candidates for orthognathic surgery have a documented skeletal jaw discrepancy — confirmed on lateral cephalometric X-ray and panoramic imaging — that causes functional problems (bite misalignment, difficulty chewing, jaw joint strain, airway restriction) or significant facial asymmetry originating from bone position. In most surgical protocols, orthodontic pre-treatment aligns teeth within each jaw before surgery, so the jaws can be moved into a stable new relationship.
Aesthetic-only candidates — patients with normal bite function seeking facial contour changes — exist in Korean practice but should understand that the functional risk profile of orthognathic surgery does not reduce because the indication is aesthetic.
Often a good candidate
- Skeletal underbite, overbite, or open bite not correctable with orthodontics alone
- Facial asymmetry caused by differential jaw growth (confirmed on imaging)
- Airway restriction or obstructive sleep apnea with documented jaw-position contribution
- Completed or near-completed facial growth (typically age 18+ for women, 20+ for men)
- Able to commit to 12–18 months of pre-surgical orthodontics and 6–12 months of post-surgical recovery
Should reconsider or wait
- Aesthetic goal only, with normal bite function — risk-benefit ratio requires careful individual assessment
- Mild asymmetry that may be addressable with less invasive options (fillers, fat grafting, genioplasty)
- Active temporomandibular joint (TMJ) disorder — surgery may worsen joint symptoms
- International patient with limited ability to attend post-operative follow-ups in Korea
Not a suitable candidate
- Facial growth not yet complete — moving jaw before growth ends risks relapse
- Uncontrolled systemic conditions affecting bone healing (unmanaged diabetes, osteoporosis, active autoimmune disease)
- Unrealistic expectations that orthognathic surgery is equivalent in recovery burden to jaw reduction
Significant risks include: permanent or prolonged sensory nerve changes (numbness or altered sensation in lips, chin, and cheeks — affects a substantial proportion of patients, with full resolution not guaranteed); surgical relapse (bone returning toward original position, more likely when soft tissue tension is high); TMJ dysfunction post-operatively; airway complications in the immediate post-operative period; infection around titanium hardware; and the need for revision surgery. The complexity of recovery — liquid diet for 4–6 weeks, swelling for 3–6 months — is frequently underestimated by patients comparing it to less invasive jaw procedures.
KSPRS board certification is legally required to perform orthognathic surgery in licensed Korean medical facilities; operating without it constitutes an illegal medical act under Korean law.⁵ Verify surgeon credentials before consultation.³
Do I need orthognathic surgery or jaw reduction in Korea?
If your concern is jaw width (a wide, square jaw) and your bite is normal, jaw reduction is likely appropriate — it shaves bone from the outer cortex of the mandible to narrow the jaw without affecting bite or jaw position. If your concern is jaw protrusion, underbite, overbite, facial asymmetry affecting jaw position, or breathing issues related to jaw structure, orthognathic surgery addresses the underlying skeletal relationship. A consultation including X-rays (lateral cephalometric and panoramic) is needed to determine which applies to your anatomy.
Is orthognathic surgery in Korea performed without functional need?
Yes — this is one of Korea's most debated medical practices internationally. Korean surgeons perform orthognathic surgery on patients with normal bite function purely for facial aesthetic goals (facial lengthening, facial projection, symmetry correction). This is uncommon practice outside East Asia. Whether it is appropriate depends on the individual patient's functional baseline, surgical risk tolerance, and whether the aesthetic goal could be achieved through less invasive means. International orthodontic and surgical bodies generally restrict orthognathic surgery to functional indications.
How long does recovery from orthognathic surgery in Korea take?
The immediate recovery is significant. Days 1–3: hospital stay, IV nutrition, severe swelling and difficulty speaking. Weeks 1–4: liquid diet, jaw wired or banded, very limited social activity. Months 1–3: soft diet, intermittent swelling, jaw function gradually returning. Months 3–12: final facial shape emerging, nerve sensation returning in most areas. Flying home 2 weeks post-surgery is typically the minimum — most surgeons prefer 3–4 weeks given post-operative monitoring complexity and the need for jaw function to be confirmed before discharge.
Sources
¹ [ksprs-registry-org-identity] Korean Society of Plastic and Reconstructive Surgeons — Board Certification Registry. https://www.plasticsurgery.or.kr/
² [ksprs-registry-training-requirements] Korean Society of Plastic and Reconstructive Surgeons — Board Certification Registry. https://www.plasticsurgery.or.kr/
³ [ksprs-registry-public-verification] Korean Society of Plastic and Reconstructive Surgeons — Board Certification Registry. https://www.plasticsurgery.or.kr/
⁴ [ksprs-registry-total-certified] Korean Society of Plastic and Reconstructive Surgeons — Board Certification Registry. https://www.plasticsurgery.or.kr/
⁵ [ksprs-registry-legal-requirement] Korean Society of Plastic and Reconstructive Surgeons — Board Certification Registry. https://www.plasticsurgery.or.kr/