Before & After · Gangnam, Seoul
Protruding Mouth Surgery (ASO) Before and After in Korea
Protruding mouth surgery (ASO, anterior segmental osteotomy) moves the front of the upper and lower jaw back to reduce lip protrusion and improve the side profile. These before and after photos show results for patients treated by Dr. Sang-Baek Han in Gangnam, Seoul.
Medically reviewed by Dr. Sang-Baek Han, M.D., Ph.D. — Seoul National University graduate, Korean board-certified plastic surgeon · Last reviewed October 2026
Patient results
Protruding Mouth Surgery (ASO) before and after photos
Photos are of real patients treated at Seoul Cheil Plastic Surgery and are shown with their consent. Individual results vary; a consultation is needed to confirm suitability. All surgery carries risk.
What changes
What patients typically see after protruding mouth surgery
- A flatter, more relaxed lip line in profile
- Lips that close without strain
- A more defined nose–lip–chin balance
- A less prominent gum line when smiling
Who it suits
Who is a candidate?
- Moderate to severe bimaxillary protrusion
- Lips that do not close naturally
- Protrusion that braces alone cannot correct
Surgeon for every case on this page
Dr. Sang-Baek Han, M.D., Ph.D.
Seoul National University graduate (M.D., master's and Ph.D.), trained in plastic surgery at Seoul National University Hospital, and a Korean board-certified plastic surgeon since 1999. He personally performs every operation at Seoul Cheil Plastic Surgery.
FAQ
Protruding Mouth Surgery (ASO) — frequently asked questions
How long until I see the final result of ASO?
Most patients return to daily activities in 3–4 days. Swelling and bruising usually settle over 1–2 weeks, and the final profile is typically visible after 1–2 months.
Does ASO leave scars?
No visible scars. All incisions are made inside the mouth.
Is the result permanent?
Yes. Once the bone segments heal in their new position, the result is permanent.
Related results
Get a free photo assessment
Send front and side photos. Dr. Han's team will tell you whether protruding mouth surgery suits you and how to plan your trip to Seoul.