Jaw Reduction Surgery in Korea

What Jaw Reduction Involves

턱 수술 (teog susu, meaning “jaw surgery”) — more specifically jaw reduction — reshapes the lower third of the face by surgically modifying the mandible (lower jawbone) to reduce width, soften the posterior jaw angle, or create a tapered appearance from the front and side.

The procedure targets the mandibular angle: the bony corner where the jawbone turns from horizontal to vertical, roughly below and behind each earlobe. A prominent or square mandibular angle is partly skeletal structure and partly masseter muscle (the chewing muscle that sits over the angle). Jaw reduction surgery addresses the bone; some patients also receive masseter botulinum toxin injections to address muscle bulk, though this is a separate non-surgical step.

All jaw reduction procedures are performed under general anesthesia. The surgical access is intraoral — incisions are made inside the mouth along the lower gum line, so no external scars result. Working through these incisions, the surgeon reaches the mandibular angle with oscillating saws and burrs (rotating abrasive instruments) to reshape or remove sections of bone.

Three distinct approaches exist, ranging from surface smoothing to full structural reshaping. Which technique applies depends on the degree of jaw prominence, the underlying bone structure visible on CT imaging, and the result the patient is seeking. A CT scan — standard at Korean contouring clinics — is required before surgical planning, because the thickness and shape of the outer bone layer varies significantly between patients and determines how much can be safely removed.

Costs in Korea range from approximately ₩3.5M–₩9M (≈$2,600–6,700 USD / ≈$4,000–10,400 AUD) for jaw reduction alone, with the anesthesia fee (₩800K–1.5M, ≈$590–1,100 USD) itemized separately. All prices noted in this article use an FX reference date of July 2026.

Korea has approximately 2,100 board-certified plastic surgeons registered with the Korean Society of Plastic and Reconstructive Surgeons (KSPRS; 대한성형외과학회, Daehan Seonghyeong Oegwa Haghoe, South Korea’s official professional and certification board for plastic and reconstructive surgeons).¹ Board certification requires six years of medical school, a four-year plastic surgery residency, and passage of KSPRS board examinations.² For jaw surgery specifically, case volume within a certified surgeon’s practice matters as much as the credential itself.

Jaw Reduction Techniques: Outer Cortex, Cortical Ostectomy, Full Mandibuloplasty

Three main surgical techniques are used in Korean contouring practice, with a fourth category for combined procedures. Understanding what each technique changes — and what it cannot change — prevents misaligned expectations.

Outer cortex removal (also called jaw shaving or cortical shaving) removes only the outer surface layer of the mandibular angle using a burr or saw. The bone is smoothed and reduced in thickness but the overall angle shape is preserved. This is the least invasive technique, generally completed in 1.5–2.5 hours, and does not require overnight hospitalization at most facilities. The narrowing effect is real but moderate — patients whose squareness comes primarily from the protruding outer cortex see the clearest benefit. Patients whose jaw width is driven by a wide underlying bone structure see limited change.

Cortical ostectomy removes a section of the outer cortical plate in a defined block rather than grinding it down incrementally. This allows slightly more aggressive reduction than simple shaving while stopping short of full angle resection. It occupies a practical middle ground suited to patients with moderate-to-prominent angles who are not candidates for full mandibuloplasty.

Full mandibuloplasty (만디불로플라스티, mandibulloplasty) is the most comprehensive technique. The surgeon removes the posterior mandibular angle entirely and may also reshape the lower border of the mandible — the curved inferior edge visible in a front-facing photo. This addresses both the side profile and the front-facing width simultaneously. Because more bone is removed and the surgical site is larger, post-operative swelling is more severe and 1–2 nights hospitalization is standard to monitor airway and bleeding risk.

Technique selection is not purely patient preference — it is determined by CT scan findings. A surgeon recommending full mandibuloplasty on a patient whose squareness is primarily muscular, or recommending only cortex shaving on a patient with genuinely wide posterior bone structure, is not planning the procedure correctly. Ask to see the CT images and have the surgeon explain which anatomical finding drives the recommendation.

Ideal Candidates for Jaw Reduction

One practical screening step that costs nothing: KSPRS maintains a public registry allowing patients to verify a surgeon’s board certification by searching their name directly on the KSPRS website.³ Run this check before any consultation deposit is paid. KSPRS board certification is a legal requirement to perform plastic surgery procedures in licensed facilities in Korea — operating without it constitutes an illegal medical act.⁴

Results and Realistic Expectations

Jaw reduction produces measurable change in jaw width and angle definition — but the degree of change is constrained by what CT imaging shows about the underlying bone. Two patients who present with visually similar jaw profiles can require different techniques and achieve different degrees of narrowing, depending on whether the prominence is primarily cortical thickness, posterior angle protrusion, lower border flare, or masseter muscle bulk.

The result that jaw reduction surgery can deliver with high reliability: softened jaw angle, reduced side-profile squareness, and a tapered front-facing lower face when full mandibuloplasty addresses both the angle and lower border. What it cannot reliably deliver: a transformation from a wide face to a narrow one when facial width is driven by cheekbone width, facial fat distribution, or a wide mandibular body (the horizontal section between the chin and angle), none of which jaw angle surgery addresses.

Three specific points to set before surgery with your surgeon:

Front-facing change versus profile change. Outer cortex removal and cortical ostectomy primarily reduce the side-profile squareness. Front-facing width reduction requires addressing the lower border or combining with cheekbone surgery.

Masseter contribution. If the masseter muscle (the thick chewing muscle that overlies the angle) is a significant contributor to apparent jaw width, surgery alone will not produce the expected narrowing. Some surgeons perform partial masseter reduction concurrently; others recommend botulinum toxin injections post-recovery to reduce remaining muscle bulk.

Asymmetry. Most faces have baseline jaw asymmetry. Surgery can improve symmetry but rarely eliminates it. Request that the surgeon mark and document pre-existing asymmetry on your CT before the procedure so post-operative comparisons are accurate.

Final contour is not visible until 3–6 months post-surgery for most techniques; full mandibuloplasty patients may see continued refinement to 12 months as deep swelling resolves and the soft tissue re-drapes over the reshaped bone.

Recovery: 24–48hr Hospital Stay and 4–6 Week Swelling

Recovery from jaw reduction follows a predictable pattern, but the intensity is frequently underestimated by patients who have only experienced soft-tissue facial procedures.

Hours 0–24. Patients wake from general anesthesia with compression garments around the lower face and jaw. Swelling begins immediately. Most full mandibuloplasty patients spend the first night in the clinic or hospital for monitoring — the concern is airway compromise from severe swelling and any post-operative bleeding near the intraoral incision site. Drains are occasionally placed and removed the same day or the following morning.

Days 2–7. Swelling peaks around days 3–4, at which point the face appears significantly rounder and wider than baseline — not narrower. This is normal and expected, not a sign of complication. Pain is generally manageable with oral medication. Opening the mouth is restricted and uncomfortable. A liquid diet is mandatory during this period.

Weeks 2–3. Visible bruising fades. Swelling begins to reduce, though significant puffiness persists. Patients are generally presentable in public with loose clothing and some concealment, but the jaw shape is not yet visible. Soft foods begin to replace liquids. Most patients working remotely can return to desk work within 7–10 days; in-person work requires 2–3 weeks minimum.

Weeks 4–6. Initial swelling has reduced to approximately 60–70% resolved. The approximate final jaw shape becomes visible for the first time. Mouth opening approaches normal range for most patients. Exercise remains restricted; contact sports are off-limits for 3 months minimum.

3–6 months. For outer cortex procedures, the result is largely stable. For full mandibuloplasty, the lower face continues to refine as residual deep swelling resolves.

Regarding safety: between 2016 and 2024, 50 deaths were linked to plastic surgery procedures in South Korea based on National Forensic Service (국립과학수사연구원, Gungnnip Gwahak Susasaeng Guwon, South Korea’s official forensic body for cause-of-death investigations) analysis.⁵ Nearly half — approximately 23 cases — involved anesthesia-related complications as a primary or contributing cause.⁶ Cases occurring outside licensed hospital settings carried elevated mortality risk compared to procedures performed in properly licensed facilities.⁷ Confirm your procedure is scheduled in a licensed surgical facility, not a clinic consultation room.

Combining with Cheekbone and Chin Procedures

Jaw reduction is frequently performed alongside two other facial contouring procedures: 광대 축소술 (gwangdae chuksosuul, cheekbone reduction) and 턱끝 성형 (teogkkeut seonghyeong, genioplasty, chin reshaping). Together, the three procedures address the upper, middle, and lower thirds of the lower face simultaneously — an approach Korean clinics refer to collectively as facial contouring or V-line surgery.

The clinical rationale for combining: the face reads as a single visual unit. Reducing jaw width without addressing prominent cheekbones can create a facial profile that appears top-heavy. Adding genioplasty — which can advance, set back, shorten, or taper the chin — completes the tapered lower-face shape that jaw angle reduction alone cannot achieve if the chin is wide or recessed.

The practical trade-off is significant: combined procedures extend total surgical time to 5–6 hours and increase total anesthesia exposure. Recovery is more intense, with broader and longer-lasting swelling across the full face. The budget increases substantially — combined facial contouring in Korea typically runs ₩8M–₩18M (≈$5,900–13,300 USD / ≈$9,200–20,700 AUD), plus anesthesia, hospitalization, and post-operative care.

Combined procedures are appropriate for patients whose facial contouring goals genuinely require all three changes. They are not automatically better than isolated jaw reduction for patients whose concerns are specific to the jaw angle alone. This distinction should be part of a frank pre-surgical conversation, not a default upsell.

References

¹ Korean Society of Plastic and Reconstructive Surgeons, Membership Statistics, KSPRS Annual Report 2024. [ksprs-registry-total-certified]

² Korean Society of Plastic and Reconstructive Surgeons, Board Certification Requirements Section, KSPRS website. [ksprs-registry-training-requirements]

³ Korean Society of Plastic and Reconstructive Surgeons, Public Registry Section, KSPRS website. [ksprs-registry-public-verification]

⁴ Korean Society of Plastic and Reconstructive Surgeons, Legal Requirements Section, KSPRS website and Medical Practices Act reference. [ksprs-registry-legal-requirement]

⁵ National Forensic Service, Summary Findings, NFS Surgical Mortality Analysis 2016–2024. [nfs-study-2024-total-deaths]

⁶ National Forensic Service, Cause-of-Death Breakdown, NFS Surgical Mortality Analysis 2016–2024. [nfs-study-2024-anesthesia-deaths]

⁷ National Forensic Service, Facility-Type Risk Analysis, NFS Surgical Mortality Analysis 2016–2024. [nfs-study-2024-unlicensed-settings]