Most people with bony protrusion know deep down that the problem may be in the bone, not the teeth – but when they hear words like “osteotomy” and “general anesthesia,” it feels distant and frightening. In fact, two‑jaw surgery is a highly mature maxillofacial procedure in Korea – from preoperative 3D simulation, intraoperative navigation, to postoperative hospital observation, every step has a clear and predictable path. Who is suitable, how long the hospital stay is, what to eat after surgery, and when normal life resumes – all these details you most want to know are explained plainly below. Understand the entire process first, then decide if it is right for you.
Skeletal protrusion results from excessive forward projection of the maxilla or mandible, or maxillary retrusion causing visual protrusion. Orthodontics alone cannot change bone position; two‑jaw surgery (orthognathic surgery) is required to osteotomize, reposition, and fix the bones, re‑establishing the occlusal plane and facial proportions. The surgery uses Le Fort I osteotomy (maxilla) and SSRO (bilateral sagittal split ramus osteotomy) (mandible), assisted by 3D‑printed surgical guides for millimeter‑precision movement, simultaneously improving occlusal function and side profile.
Patients must be adults (≥18 years) with mature skeletal development, presenting with skeletal Class II (maxillary protrusion / mandibular retrusion) or skeletal Class III (underbite). Typical signs include: the E‑line (nose‑tip‑to‑chin line) is clearly deviated on the profile, lips cannot close naturally, severe smile gingival (gummy smile), occlusal disorders, or temporomandibular joint discomfort. Preoperative evaluation includes CT, cephalometric analysis, and dental casts. Contraindications include severe systemic diseases, uncontrolled diabetes, coagulation disorders, pregnancy, and unrealistic psychological expectations.
Two‑jaw surgery can involve advancement, setback, impaction, or rotation in various combinations. Mainstream approaches in Korea include combined maxillary‑mandibular osteotomy or single‑jaw surgery (as appropriate). Fixation uses titanium plates and screws; absorbable materials are also being adopted. Surgery takes about 2–4 hours under general anesthesia. Choosing a board‑certified Oral and Maxillofacial Surgeon (OMS) with digital planning improves predictability.
| Procedure | Indication | Typical Movement | Hospital Stay | Reference Cost (KRW) |
|---|---|---|---|---|
| Maxillary advancement + mandibular setback | Skeletal Class II (protrusion) | Maxilla 3‑6mm forward, mandible 5‑10mm backward | 3‑5 days | ₩15,000,000 – ₩25,000,000 |
| Maxillary setback + mandibular advancement | Skeletal Class III (underbite) | Maxilla 3‑5mm backward, mandible 5‑8mm forward | 3‑5 days | ₩15,000,000 – ₩25,000,000 |
| Single‑jaw surgery (maxilla or mandible only) | Mild skeletal anomaly or combined with orthodontics | Single jaw movement 4‑6mm | 2‑3 days | ₩10,000,000 – ₩18,000,000 |
| Two‑jaw + adjunct contouring (zygoma/chin) | Complex facial asymmetry | Combined adjustment, optimising overall proportions | 4‑6 days | ₩25,000,000 – ₩35,000,000 |
Preoperative preparation (1‑2 months): 3D CT scan, dental VTO (virtual treatment planning), coordination with orthodontist; some patients require preoperative orthodontics to align teeth. Sign informed consent.
Day of surgery: Under general anaesthesia, the surgeon makes intraoral incisions, performs osteotomies, uses navigation guides to precisely reposition bones, and fixes them with titanium plates. Minimal bleeding, total time about 2‑4 hours.
Postoperative hospital stay: In‑hospital observation for 3‑5 days, with antibiotics, analgesics, and ice packs. Initial diet is liquid, with mouthwash to maintain oral hygiene.
Recovery (1‑3 months): After discharge, wear elastic traction to stabilise occlusion; soft food for 2‑4 weeks; gradually transition to normal diet in 1‑2 months. Facial swelling subsides significantly in 2‑3 weeks, with full natural results taking 3‑6 months.
Immediate Effect: The profile improves instantly after surgery, protrusion is notably corrected, lips can close naturally – but swelling temporarily masks some of the result.
Progressive Effect: As swelling subsides (1 month post‑op) and bone heals (3‑6 months), the final contour gradually emerges. The skeletal changes are permanent – lasting a lifetime unless there is severe trauma or bone resorption. Occlusal function, airway patency, and self‑confidence also significantly improve.
Q1: Is two‑jaw surgery mandatory for bony protrusion?
If the skeletal protrusion exceeds 5mm and is accompanied by occlusal problems, orthodontics alone has limited effect, and surgery is usually recommended. For mild to moderate cases, fillers may camouflage the appearance, but they do not address the root bone issue and are not permanent.
Q2: Is the surgery painful? How long is recovery?
Under general anaesthesia, the surgery itself is painless. Pain and swelling are noticeable 1‑2 days post‑op but are well‑controlled with medication. Most people return to non‑strenuous daily activities after 2 weeks; complete swelling resolution takes 3‑6 months.
Q3: Is two‑jaw surgery safe in Korea?
Korea has advanced 3D navigation equipment and highly experienced maxillofacial surgeons, with low complication rates. The key is choosing a KFDA‑certified hospital and a specialist with international training background.
Q4: What is the total cost?
Basic two‑jaw surgery costs about ₩15,000,000‑25,000,000, plus preoperative orthodontics (≈₩5,000,000‑10,000,000) and postoperative examinations, totalling roughly ₩20,000,000‑35,000,000. Actual costs depend on hospital tier, surgeon’s experience, and whether adjunct contouring is added.
Q5: Will there be visible scars?
All incisions are made intraorally, so there are no visible facial scars – External Scar is zero.
Two‑jaw surgery is a major surgery. Potential Side Effects include temporary facial numbness (recovering in 6‑12 months), infection, bone non‑union, occlusal instability, or nerve injury (rare). Choosing a Certified Oral and Maxillofacial Surgeon is crucial; intraoperative neuro‑monitoring can reduce risks.
Strong Advice: We strongly recommend adequate psychological preparation and financial assessment before surgery, and consult multiple hospitals for comparison. Strictly follow dietary and oral care guidelines post‑surgery, and attend regular follow‑ups. Please treat this content as educational reference only; final surgical decisions must be made by a Korean licensed physician based on your 3D CT data and in‑person consultation. Prioritise both beauty and health – choose rationally.