Jaw Slimming Injection
Jaw slimming injections use botulinum toxin to reduce masseter muscle activity — for a slimmer, more refined jawline and V-line profile, with the additional benefit of relieving teeth grinding and jaw tension. Performed by Dr. Vincent.
About jaw slimming
The width of the lower face is largely determined by the masseter — the muscle that closes the jaw, sitting at the angle of the mandible. When the masseter is naturally large, or when it has enlarged over time from teeth grinding or jaw clenching, it produces a square or wide jawline appearance. Jaw slimming injections use small amounts of botulinum toxin to gently reduce the activity of the masseter muscle. As the muscle works less, it gradually atrophies — and the lower-face width reduces, producing a slimmer, more V-shaped profile.
The treatment also addresses functional concerns. Teeth grinding (bruxism) and jaw clenching are common — they cause headaches, tooth wear, jaw pain, and sleep disturbance. Reducing masseter activity addresses these symptoms directly: many clients seek jaw slimming primarily for the functional benefit, with the cosmetic improvement being secondary.
At Vincere, the treatment is personalised, not standardised. The dose, placement depth, and number of injection points are calibrated to muscle size, the degree of slimming desired, and any functional symptoms present. Dr. Vincent draws on extensive injectable experience to deliver gradual, natural-looking slimming rather than excessive reduction.
Common concerns addressed
Square or wide lower face
When the natural width of the masseter produces a more square jaw appearance than desired. Reduction creates a softer, more V-shaped profile.
Teeth grinding (bruxism)
Reduced masseter activity directly relieves the muscle force behind grinding — often improving headaches, tooth wear, and jaw pain within weeks.
Jaw clenching and tension
When jaw tension is causing facial pain, headaches, or sleep disruption. Reducing the muscle activity that produces clenching addresses the cause.
Hypertrophic masseter from gum chewing or stress
Some lifestyle factors enlarge the masseter over time — habitual gum chewing, hard food, or prolonged stress. The treatment can reduce this acquired enlargement.
Asymmetric jaw width
When one side of the jaw is wider than the other. Different doses can be used per side to balance the asymmetry.
V-line aesthetic preference
For clients seeking a more refined, V-shaped lower face profile — common in East Asian aesthetic preferences. The combination with chin filler often produces particularly satisfying results.
Your treatment journey
Why choose Vincere
Jaw slimming requires anatomical precision. The masseter is adjacent to facial muscles that control smiling — incorrect placement can affect smile dynamics or produce asymmetry. Dr. Vincent brings AMI Faculty-level injection technique specifically to handle the depth and placement accurately.
The aesthetic philosophy at Vincere is gradual, natural slimming rather than dramatic muscle reduction. Excessive doses produce a hollowed lower face that looks unnatural; conservative doses produce gradual refinement that builds with repeated treatment. The first treatment is often modest, with adjustment based on response at the next session.
The functional benefit is genuinely valuable for many clients. Teeth grinding affects sleep, dental health, and quality of life — and traditional approaches (mouth guards, dental wear management) address symptoms rather than the underlying muscle force. Jaw slimming treats the cause directly. Many clients return for ongoing treatment specifically for the functional relief, with the slimmer jawline as a complementary benefit.
Frequently asked
questions
Can't find your answer here? Message Dr. Vincent — he's happy to address your concerns personally.