TL;DR

Jaw angle reduction surgery (mandibular angle osteotomy) is a minimally invasive bone contouring procedure performed through an intraoral approach. The surgeon removes or reshapes the lower jaw angle through outer cortex splitting or full-thickness reduction, creating a slimmer, more defined jawline. The procedure takes 2.5–3.5 hours under general anesthesia with no external scars. Most patients experience significant swelling for 2–3 weeks, achieve 80% of final results by 3 months, and see complete definition by 6 months. Common risks include temporary marginal mandibular nerve paresthesia, asymmetric swelling, and rare revision surgery needs.

Quick Facts

Topics covered in this complete guide

1. Who is a candidate — Indications (jaw width >70mm, square face, asymmetry) and contraindications
2. Two main surgical techniques — Outer Cortex Sagittal Split (OCSS) vs Full-Thickness Reduction; curved vs straight osteotomy; tension band fixation
3. Pre-operative assessment — 3D CT scanning, occlusal evaluation, asymmetry analysis
4. Anesthesia and surgical process — Step-by-step intra-operative protocol
5. Post-operative recovery timeline — 0–7 days, weeks 1–4, months 1–3, months 3–6, 6–12 months
6. Risks and complications — Marginal mandibular nerve injury, asymmetry, sagging, masseter atrophy (with incidence rates)
7. Jaw angle reduction vs masseter Botox vs burr grinding — When each is appropriate
8. Cross-border treatment for overseas patients — 30-day timeline
9. How to choose your surgeon — 5 criteria including tertiary hospital credentials and tension band experience
10. Frequently asked questions — Cost, scarring, occlusion impact, revision, anesthesia safety

The complete clinical guide is being added in stages. For consultation in the meantime, please contact us.

About the surgeon

Dr. Liu Shuangli is a plastic surgeon at Ren’Ai Hospital, Shanghai, with over 20 years of clinical experience in facial contouring including cheekbone reduction, jaw angle reduction, and orthognathic surgery. He works with overseas Chinese, Taiwanese, and other international patients.

Related procedures

• Cheekbone Reduction Surgery — Often combined with jaw angle reduction for a comprehensive V-line transformation
• Orthognathic Surgery — Corrective jaw surgery for skeletal misalignment