How I Fixed Protruding Teeth AND an Underbite with ONE Surgery 9° Tooth Axis Change

Описание: Prof. Uilyong Lee, MD — Oral & Maxillofacial Surgery, Chung-Ang University Hospital, Seoul, Korea

Can you fix protruding teeth AND an underbite without changing the bite? Yes — with rotational double jaw surgery. In this video, I walk you through a real patient case where I used clockwise rotation of the maxillomandibular complex (4.2mm) to correct severely proclined upper incisors and mild mandibular prognathism, all while preserving the existing occlusion.

This 29-year-old female patient came to me with three concerns: an unnatural smile caused by protruding upper teeth, a flat midface, and a mild prognathic (underbite) appearance. Her upper incisor axis was 122.3° — well above the normal range of 106–116°. Rather than traditional setback surgery, I planned a clockwise rotation of 4.2mm, which changes the tooth axis by approximately 2° per mm. The result? A 9° improvement in tooth axis, from 122° to 115°, with the underbite completely resolved.

To prevent a “monkey mouth” appearance (anterior fullness from rotation), I added 1mm maxillary setback and 1mm inferior repositioning. Since rotation makes the chin appear shorter, I also performed a genioplasty (chin advancement + lengthening) to complete the facial balance.

✨ WHAT YOU’LL LEARN IN THIS VIDEO:
• How clockwise rotation of the occlusal plane corrects protruding teeth (tooth axis)
• The formula: 1mm rotation 2° of tooth axis change
• How rotation simultaneously corrects mild mandibular prognathism (underbite)
• Why maxillary setback + downgraft prevents “monkey mouth” after rotation
• How genioplasty compensates for a chin that becomes shorter after rotation
• Full 3D simulation walkthrough and CT before/after comparison
• Before and after facial photos (frontal, 45°, lateral profile)
• Smile comparison: how rotational surgery creates a more natural smile


📌 Surgeon: Prof. Uilyong Lee, MD
🏥 Chung-Ang University Hospital, Dept. of Oral & Maxillofacial Surgery, Seoul, Korea
📩 Consultation: WhatsApp Facedesigner
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