Why do I have a square jaw?

A square jaw can be the result of a particularly massive bone structure. But in most cases, it’s the result of overdevelopment of the masseter muscle, which plays an essential role in mastication.

This hypertrophy of the masseter is more frequently observed in Asian people, suggesting an ethnic, and therefore genetic, origin to its formation. However, certain dietary habits may also play a role in its development.

Botulinum toxin for the masseter

Botox is the commercial name for botulinum toxin, a natural substance produced by bacteria that neutralizes muscle activity in the area where it is injected.

For the treatment of square jaws, botulinum toxin is injected on both sides of the face, according to a pre-established dosage whose precision ensures that the muscular strength required for mastication is preserved. The reduction in masseter activity induced by botulinum toxin results in a reduction in its volume, and thus a significant refinement of the jaw.

The procedure is carried out in the doctor’s office, and involves very little effort: it is virtually painless and lasts around fifteen minutes, with no need for anaesthetic and no social exclusion. The effects are visible immediately, and are optimal between 15 and 30 days after the session.
A second session may be indicated in certain cases.

As botulinum toxin is gradually and completely absorbed by the body, it is perfectly tolerated and its effects are temporary, lasting 6 to 8 months on average.

Maintenance is therefore necessary to maintain results.

Who can use Botox for an overdeveloped jaw?

The procedure is intended for all men and women who have a square jaw they wish to refine, and whose cause is hypertrophy of the masseter muscle rather than an overdeveloped bone structure. In the latter case, a Botox injection would be of no use.

In this respect, the initial consultation is essential: it enables Dr. Hayot to identify the origin of the jaw shape, and thus direct his patients towards a suitable solution. If it’s indeed the masseter that’s at fault, the doctor then carries out an in-depth morphological analysis of the patient’s face. This enables him to determine, with great precision, the best dosage of Botox to inject, i.e. that which will achieve the desired result without altering the quality of chewing.

This initial consultation also enables the doctor to identify any possible contraindications and answer any questions the patient may have. At the end of the session, Dr. Hayot provides the patient with a personalized, detailed estimate.