V-line contouring (브이라인).

The surgical procedure (하악 윤곽술) cuts and reshapes the mandible — the lower jawbone — to narrow the facial profile. It typically includes a T-shaped chin osteotomy (genioplasty) and mandible angle reduction. This is a major procedure under general anesthesia, with a 2–3-day hospital stay at the clinic and visible swelling for 2–4 weeks. Final contour settles at 3–6 months.

Two main injectables are used. Masseter botulinum toxin (턱보톡스) reduces the bulk of the masseter muscle over 4–6 weeks, shifting the jawline appearance. Effects last 4–6 months and dose accumulates across repeat treatments. Contouring fillers in the chin or along the jawline adjust shape directly; duration depends on the product (12–18 months for most HA gels).

For surgical: the specific bone cut technique, nerve preservation protocol (the inferior alveolar nerve runs through the mandible), the clinic's recovery room and overnight staffing, and the surgeon's specific annual volume. For botox: brand and unit count; many Korean clinics use domestic toxins (Nabota, Botulax, Meditoxin) at lower price points than Allergan Botox.

Surgical: 2 weeks of visible swelling, 4–6 weeks of residual tightness, full settling at 6 months. Hospital stay is typically 1–3 nights at the clinic. Botox: none. Filler: minor swelling and bruising for 1–3 days.

Surgical: ₩6,000,000–₩15,000,000 depending on combined procedures (chin osteotomy + mandible + cortical reduction). Masseter botox: ₩200,000–₩500,000 per session (every 4–6 months). Contour fillers: ₩800,000–₩3,000,000 per treatment depending on volume used.

For surgical: "How many genioplasties and mandible reductions has the surgeon performed in the past 12 months, and what's the clinic's infection rate for this procedure class?" For injectable: "How do you handle over-reduction if the botox effect is too strong?" Both questions separate casual practitioners from serious ones.

V-line contouring (브이라인) in Korea is not one experience but two, and the gap between them is wider than almost any other category in this directory. The surgical path begins weeks before the operating room. A pre-operative work-up at a Gangnam facial-bone clinic typically includes a panoramic radiograph, a fine-cut maxillofacial CT scan, three-dimensional simulation of the planned mandible angle reduction (하악각절제술), the chin osteotomy (턱끝성형), and any combined T-osteotomy or zygomatic reduction (광대축소술), bloodwork, an electrocardiogram in patients above a certain age, and a structured consent conversation covering the inferior alveolar nerve risk. On the day of surgery the patient changes into a hospital gown, an intravenous line is placed, and general anesthesia is induced with intubation. The approach is intraoral — a single incision inside the mouth along the lower vestibule — so there is no external scar visible afterward. Operative time runs roughly two to four hours depending on whether the procedure is mandible-only or a full facial-contouring stack (안면윤곽수술).

Patients wake up in recovery with a compression bandage wrapped around the lower face, intraoral packing, and one or two small drains. The first 24 hours are dominated by swelling, restricted mouth opening, and a liquid-only diet. Korean clinics typically keep V-line patients in-house for one to two nights for monitoring. Day 3 to day 7 the swelling peaks and then begins to recede, talking is limited, and meals stay soft. By week 2 most external swelling has resolved enough to be presentable in public; by week 4 the residual tightness eases; the bone and soft-tissue contour continues to settle for six to twelve months.

The non-surgical path looks nothing like this. A combination V-line visit — masseter botulinum toxin, a small chin filler placement, and a jawline thread lift in the same chair — runs roughly 30 to 45 minutes, with no general anesthesia, no hospital stay, and no formal downtime beyond mild swelling and small bruises for one to three days. The shape change phases in across two to four weeks as the masseter relaxes and the threads settle, and lasts anywhere from four to twelve months depending on the combination.

V-line contouring sits at the more serious end of the safety spectrum on the surgical side and at the well-studied lower-risk end on the non-surgical side. Nothing in this section is medical advice; the published evidence is summarised to support a more informed consultation with a licensed surgeon, not to replace it.

On the surgical side, a foundational Korean multicentre survey of 33 plastic surgeons covering 1,251 mandibular angle ostectomy operations (PMID: 17060736) reported a complication rate of approximately 9.9%, with severe events including 8 cases of subcondyle fracture and 6 cases of severe bleeding, alongside transient facial nerve injury, infection, trismus, asymmetry, undercorrection, overcorrection, secondary angle formation, and entrapped bony segment. A 528-patient 10-year retrospective review of curved mandibular angle ostectomy and outer cortex grinding through an intraoral approach (PMID: 29481477) reported an overall complication rate of about 5.87% with no serious events such as subcondylar fracture or permanent facial nerve injury, illustrating how technique refinement has reduced the rate of major complications since the procedure was popularised. A series of 588 Korean mandibuloplasty patients operated across a five-year period (PMID: 25289332) documented sensory deficits — chin, lower lip, and intraoral incision numbness — in 6.46% of cases at six months and infection in 3.23% within two postoperative weeks, with most but not all sensory changes resolving across follow-up. An anatomic study of the inferior alveolar nerve position at the mandibular angle in square-face patients versus controls (PMID: 15211199) quantified the surgical safety margin and is one of the references most commonly cited in pre-operative consent for inferior alveolar nerve injury, which remains the serious specific risk of this procedure even in expert hands.

On the non-surgical side, the masseter component of a combination V-line is the best-documented part. A randomised, double-blind, placebo-controlled multicentre phase 3 trial of prabotulinumtoxinA — the molecule sold in Korea as Nabota (나보타) — in 180 patients with benign masseteric hypertrophy (PMID: 38518110) established 48 units as an effective dose with no serious adverse events, with masseter muscle thickness reductions significantly greater than placebo at all time points. An earlier dose-finding study in 90 Korean subjects across 24, 48, 72, and 96-unit groups (PMID: 33347002) supports the 48-unit dose selection. A systematic review of botulinum toxin masseter reduction in East Asian populations across 12 studies (PMID: 30883483) characterised the safety profile as efficacious with no significant side effects, and a broader review of masseter botox for lower-face contouring (PMID: 35176198) consolidated the dose, timing, and adverse-event evidence across 14 sample-size-≥10 cohorts.

Contraindications worth raising at consultation. Pregnancy and breastfeeding: surgical V-line is universally postponed until well after delivery and cessation of breastfeeding because of general anesthesia exposure and the absence of safety data; the non-surgical combination is also typically declined in both states by reputable Korean clinics. General anesthesia in itself carries a small but non-zero cardiopulmonary risk, particularly for patients with undisclosed cardiac, pulmonary, or thrombotic histories. Bleeding disorders and active anticoagulation, uncontrolled diabetes, active intraoral infection, and severe psychiatric instability or unstable body-image disorders are also commonly raised as relative or absolute contraindications. Discuss your full medical history and current medications with your provider before booking.

V-line contouring narrows the lower-face silhouette so that the line from chin to jaw angle reads visually as a soft V rather than a square. Two anatomical mechanisms produce that change. Surgical V-line removes mandibular bone — the angle and a portion of the lateral cortex along the body — and reshapes the chin, often via a T-osteotomy or sliding genioplasty (턱끝성형), which simultaneously narrows and slightly shortens the chin point. The non-surgical version produces a partial, softer version of the same visual effect by reducing the bulk of the masseter muscle with botulinum toxin, adding chin projection or shape with hyaluronic-acid filler, and lifting the jawline with absorbable threads. The surgical effect is permanent in its bone change; the non-surgical effect is transient and sits on top of unchanged underlying bone.

What V-line contouring does not do is the more important conversation. It does not change the midface, the cheekbones, or the upper face — patients seeking zygomatic narrowing need a separate reduction malarplasty (광대축소술), and the bimaxillary (양악수술) procedure is a different operation entirely with different indications and a different risk profile. It does not lift sagging skin: in older patients, the soft-tissue envelope must redrape over the smaller bony frame, and the limiting factor on the visible result is skin elasticity rather than the bone work itself, which is why surgical V-line is typically indicated for patients in their twenties and thirties rather than later. It does not change lip position, smile dynamics, or skin quality. It cannot transform face shape entirely: the safe limit on bone removal — set by the inferior alveolar nerve, the cortical thickness, and the structural integrity of the mandible — prevents the kind of dramatic over-reduction occasionally seen in viral before-and-after content.

The honest indication picture in Korea is a patient with a square or wide mandible, bilateral masseter prominence, and occasionally a slight chin asymmetry, often aged 20 to 35. A thin, narrow, or already-V-shaped jaw is not a candidate for surgical reduction. Discuss with your surgeon whether your underlying skeletal anatomy actually supports the change you are imagining, before any procedure is scheduled.

Published outcome data for V-line contouring have grown substantially in the last decade, with Korean cohorts dominating the evidence on both the surgical and non-surgical sides. The clinical picture is consistent: measurable reductions in lower-face width on three-dimensional CT, patient-reported satisfaction in the high range when indication and technique are appropriately matched, and a slow but real bone-remodelling response that varies meaningfully with surgical technique.

On surgical outcomes and long-term bone behaviour, a three-dimensional CT volumetric analysis of 24 patients followed for at least twelve months after mandibular angle ostectomy and outer cortex grinding (PMID: 29317142) documented a small but measurable bone regeneration of 1.42% on average, with the long-term post-operative volume remaining significantly below pre-operative values — confirming that the surgical reduction holds across follow-up rather than regenerating fully. A 106-patient comparative study of V-line ostectomy versus long curved ostectomy (PMID: 37832138) found that V-line ostectomy preserved a more physiological mandibular angle, produced larger posterior mandibular height, and resulted in significantly higher FACE-Q facial-appearance scores than long curved ostectomy, which was associated with gonial deficiency and more visible soft-tissue sagging. A 528-patient ten-year retrospective review of intraoral curved ostectomy with outer cortex grinding (PMID: 29481477) reported significantly improved aesthetic appearance with high patient satisfaction across the cohort. A safety-focused Korean technique paper on burring and holes-connecting ostectomy (PMID: 24699107) documented no subcondylar fractures across 23 consecutive patients and is one of the technique references that has shaped how some Korean clinics now perform the bone cut.

On patient-reported outcomes, a FACE-Q study of 56 patients undergoing orthognathic surgery and osseous genioplasty (PMID: 26501967) reported FACE-Q score improvements of +24.5 in satisfaction with overall facial appearance and +40.7 in satisfaction with the lower face and jawline, with consistent improvements across all four chin-specific items (profile, prominence, shape, overall). A review of Asian facial-contouring practice (PMID: 36336603) consolidates the indication picture for square-face patients and the combined zygoma-and-mandible-reduction protocol that drives much of Korean V-line practice.

On the non-surgical side, the prabotulinumtoxinA phase 3 trial in 180 masseteric hypertrophy patients (PMID: 38518110) demonstrated significant masseter thickness reduction at twelve weeks with the 48-unit dose, and the broader review evidence (PMID: 35176198, PMID: 30883483) places peak masseter reduction at approximately month three with effect duration of six to twelve months and a 3D-CT-quantified mean masseter reduction of around 30%. Patient-satisfaction across these cohorts is consistently high, with the published literature converging on the view that indication selection — surgical for genuine bony excess, non-surgical for masseter-driven width — drives outcome more than any single technical choice. Discuss with your surgeon which mechanism actually applies to your face.

Korean V-line surgery (한국 브이라인 수술) is one of the most-searched aesthetic categories in international queries, with korean V-line surgery, K-pop jaw, korean jaw surgery, mandibular contouring korea, V-line cost korea, and korean jaw reduction sitting at the top of inbound traffic to Gangnam facial-bone clinic websites. The K-pop V-line aesthetic — the slim, defined lower-face silhouette associated with Korean idols and K-drama leads — is the cultural reference driving most international demand, often cited explicitly in patient consultations at Seoul clinics. Korea pioneered the modern V-line surgical protocol in the late 1990s and early 2000s, and the country still hosts the largest volume of facial-bone contouring cases globally.

Technique innovation has accelerated. Piezoelectric bone work — already familiar from rhinoplasty — is now used by some Korean facial-bone clinics for the mandibular angle and chin osteotomy, with the same advantages of soft-tissue protection, less bleeding, less vibration, and reduced post-operative swelling reported in the third-molar and orthognathic literature. Robotic-assisted and computer-navigated osteotomy is the newer Korean innovation: pre-operative 3D planning is mapped onto intraoperative guidance, with the goal of more reproducible cut geometry and more symmetric results. Three-dimensional printed cutting guides are increasingly used at premium clinics for the same reason.

On the non-surgical side, the combination V-line — masseter botulinum toxin (턱보톡스) plus chin filler plus a jawline thread lift, performed in a single visit — is the dominant 2026 stacking protocol for patients who want a partial softening of the lower face without surgery. Around the procedure on both paths, the recovery and skin-quality stack has multiplied: polynucleotide PDRN injectables (폴리뉴클레오타이드) such as Rejuran, exosome facials (엑소좀), and the glass-skin (유리피부) endpoint are commonly added in the post-operative or post-injection phase, with Korean clinics positioning the skin-quality work as part of the same continuum as the contouring itself. Demographically, international patients flying in for surgical V-line have grown across 2024 and 2025, with Seoul clinics reporting longer pre-booked stays as patients build the one-to-two-week minimum recovery window into their travel plans. None of these combinations or technologies should be selected on search-trend volume alone.

Is it safe during pregnancy or breastfeeding? No. Surgical V-line is universally postponed until well after delivery and after breastfeeding has ended, because of general anesthesia exposure and the absence of safety data on bone-contouring procedures in either state. The non-surgical combination — masseter botulinum toxin, filler, and threads — is also typically declined by reputable Korean clinics in pregnancy and breastfeeding. Treatment is rescheduled. Ask your provider for their written policy.

How long is recovery for surgical V-line? Plan on one to two nights at the clinic, two weeks of significant external swelling, four to six weeks before fine social presentability, and six to twelve months for the bone and soft-tissue contour to fully settle. Liquid and very soft-food diets dominate the first two weeks. The honest minimum stay in Korea is one to two weeks for the immediate-post-op window plus suture removal and follow-up imaging.

What is the difference between surgical and non-surgical V-line? Surgical V-line removes bone and is permanent; the downtime is real and the procedure is performed under general anesthesia. Non-surgical V-line softens the lower face by relaxing the masseter, adding small filler placements at the chin, and lifting the jawline with absorbable threads, with no anesthesia and no formal downtime. The non-surgical effect is partial and lasts roughly four to twelve months before maintenance.

Will I have a visible scar? No, with the standard intraoral approach. The incision is placed inside the mouth along the lower vestibule, so there is no external scar on the face or jawline. Discuss with your surgeon whether your case requires any external incision.

Will my smile be permanently affected? In most cases, no. A temporary asymmetry or stiffness on wide smiling is common in the first weeks after surgical V-line as the marginal mandibular branch of the facial nerve recovers from operative traction. Persistent smile asymmetry beyond several months should be reviewed with your surgeon. Permanent facial-nerve injury after intraoral V-line is uncommon but documented, and is part of standard pre-operative consent.

Can my mandibular nerve be permanently damaged? The inferior alveolar nerve runs through the mandible and is the serious specific risk of this procedure. Permanent sensory change to the chin or lower lip is the most frequently cited long-term complication; the published Korean literature places sensory deficit at six months in roughly 6% of cases (PMID: 25289332), with most but not all resolving across the first post-operative year. Ask your surgeon for their specific nerve-injury rate over the past 12 months.

Will I be able to eat normally afterward? Yes, but on a slow ramp. Liquids and soft foods for one to two weeks, soft-solid transition through week three or four, and unrestricted diet generally by week six. Mouth opening is limited in the first weeks and gradually returns.

How long do I need to stay in Korea for surgical V-line? One to two weeks minimum for the immediate post-operative monitoring, drain removal if used, suture removal, and the early follow-up imaging. Many patients return at the three-month mark for a contour review.

Does it look natural or 'overdone'? Outcome quality depends on indication selection, conservative bone-cut planning, and respect for the physiological mandibular angle. A 106-patient comparison (PMID: 37832138) showed that V-line ostectomy preserving a physiological angle produced higher FACE-Q satisfaction than long curved ostectomy that over-flattened the angle and caused gonial deficiency and visible soft-tissue sagging. Discuss your surgeon's specific approach to angle preservation before booking.

Can it be reversed if I do not like it? Surgical V-line is largely not reversible — bone that has been removed cannot be put back, and revision options are limited to bone graft or implant augmentation in cases of over-reduction. The non-surgical combination is partially reversible: filler can be dissolved with hyaluronidase, masseter botox effect wears off across several months, and threads absorb. This asymmetry of reversibility is one of the most important differences between the two paths and should be central to the consultation.