Botox can slim a square jaw caused by muscle bulk. It cannot touch a square jaw caused by bone width — and figuring out which one you actually have is the first, most important step before you spend a dollar on either treatment.
What jaw reduction surgery costs
| Scenario | Typical Cost |
|---|---|
| Mandible angle reduction (standalone) | $8,000–$16,000 |
| Combined with chin reshaping | $12,000–$22,000 |
| Combined with cheekbone reduction | $16,000–$28,000 |
| Full facial contouring package (jaw + cheek + chin) | $22,000–$35,000 |
Bone-driven versus muscle-driven jaw width
Masseter hypertrophy — enlarged jaw muscles, often from teeth grinding or simply genetics — creates a square, wide jaw appearance that responds well to Botox injections, which relax the muscle and let it atrophy somewhat over repeated treatments. This is a temporary, non-surgical fix costing $400–$800 per session, repeated every 4–6 months.
But when the jaw’s width comes from the actual bone structure — specifically a flared or prominent mandibular angle — no amount of Botox will change it, because there’s no excess muscle to relax. A consultation with a surgeon or an imaging study (CT scan) can determine which factor, or combination of both, is driving your specific jaw width, which is a critical step before committing to either treatment path.
What the surgery actually involves
Mandible angle reduction, sometimes called angle ostectomy, involves removing a section of bone at the jaw’s angle (where the horizontal and vertical portions of the mandible meet) through an intraoral incision, avoiding visible external scarring. Depending on the degree of correction needed, the surgeon may also reduce the outer cortex of bone along the jawline (a technique sometimes called “jaw shaving”) for a smoother overall contour beyond just the angle itself.
The procedure is performed under general anesthesia and typically takes 2–3 hours, longer if combined with chin or cheekbone work in the same session.
Patients seeking a comprehensively narrower, more oval facial shape often need jaw, cheek, and sometimes chin work addressed together, since these structures jointly determine perceived facial width and shape. A full combined package costs $22,000–$35,000 — substantial, but significantly less than booking each procedure as an entirely separate surgical session on different days, since anesthesia and facility fees are shared across the combined operation.
What determines your price within the standalone range
Degree of correction needed. Modest angle reduction for mild flaring costs less than significant reshaping for a pronounced square jaw.
Whether jaw shaving is added. Reducing just the bony angle is less involved than also reducing the outer cortex along the full jawline for a smoother taper.
Surgeon specialization. Maxillofacial surgeons and facial plastic surgeons with specific bone-contouring training and experience typically charge more than general cosmetic surgeons occasionally offering the procedure, but tend to produce more predictable, symmetric results.
Recovery, realistically
Expect significant facial swelling for 2–4 weeks and a required soft food diet for 2–3 weeks while the jaw heals internally. Most patients need 10–14 days away from work, and full final results — once all swelling has resolved — typically aren’t apparent until 3–6 months post-surgery.
Jaw reduction surgery carries risk to the inferior alveolar nerve, which runs through the mandible and provides sensation to the lower lip and chin — nerve injury can cause temporary or, less commonly, permanent numbness. Choose a surgeon with specific, extensive experience in mandible contouring, and discuss nerve monitoring techniques used during the procedure at your consultation.
Bottom line
Jaw reduction surgery costs $8,000–$16,000 as a standalone procedure, climbing to $22,000–$35,000 for a full combined facial contouring package with cheek and chin work. Before committing to surgery, confirm whether your jaw width is bone-driven or muscle-driven — Botox may resolve muscle-related width at a fraction of the cost, but surgery is the only option for bone-driven jaw structure.
Frequently Asked Questions
Jaw reduction surgery, medically called mandible angle reduction or angle ostectomy, typically costs $8,000–$16,000 in the U.S., depending on technique complexity and whether it's combined with chin or cheekbone procedures. Combined facial contouring packages including jaw and cheek reduction often run $18,000–$30,000.
Botox for jaw slimming relaxes the masseter muscle, which is responsible for jaw muscle bulk rather than bone width, and typically costs $400–$800 per session with results lasting 4–6 months. Surgical jaw reduction actually cuts and reshapes the mandible bone itself for a permanent change, addressing bone-driven jaw width that Botox cannot affect at all.
Significant swelling is expected for 2–4 weeks, with most patients needing 10–14 days away from work. A soft food diet is typically required for 2–3 weeks while the jaw heals, and final results are usually apparent at 3–6 months once all swelling has resolved.