Will 10+ sessions of Botox to the masseter muscles eventually cause them to stay down permanently?

It’s true that, over time, repeated sessions of Botox may weaken your muscles sufficiently that you need a lower dose, with the results lasting longer and longer. However, it’s unlikely that you would ever be able to forego the treatment entirely, as “permanent” really means forever. In general, you need to re-administer Botox in the masseters every 6 months to keep the face-slimming effect. This will just be part of your normal self-care routine. There is no guarantee, either, that your muscle will be weak enough after 10 treatments to need a lower dose; everyone is different. Please consult a board-certified dermatologist who has experience in slimming faces with Botox to get the most flattering face slimming.

Thank you very much
for your question, as it is a good one. The results from Botox are temporary,
lasting three to four months. Over time, as the targeted muscle continues to
stay relaxed, it may require a smaller amount of Botox for the same results.
Everyone is different, and may or may not find this to be true. However, even
after 10 or more Botox sessions, you should not expect truly ‘permanent’
changes in the masseter muscle. If you have any further questions, discuss the
long-term Botox treatment plan for your masseter area with a board certified
plastic surgeon, experienced in injectable treatments.

You will require continued Botox  injections to maintain the muscle mass.
You could most likely reduce the frequency of the sessions to 2-3 times a year.  Trial and error.

In my opinion the toxins do not last or render a permanent result.  I have seen some patients who get as much as 5 months and others who get a little as 3 months, which is the average expectation.  Best wishes.

Hello.  Even with many sessions of repeated Botox, the results are not permanent.  Often, the results are better with repeated treatments, but if you stop the Botox after 10+ sessions, your masseters will eventually return to their size before you started Botox.  Make sure you see a board certified physician with experience in cosmetic injectables.  Some non physicians can be good injectors, but these always work in a practice under the direct supervision of a board certified cosmetic doctor who himself/herself also is experienced in cosmetic injections.  Take care.

That is incorrect.  As a provider and recipient of botox in my masseters for TMJ - I've had over 20 + sessions over 7 years and the masseters continue to regain strength and size after 4months.  Botox and any non-surgical treatment is temporary and expectations must be set correctly.   
Botox in the masseters is highly effective in reducing muscle tension and spasm that occurs from daily talking, eating, chewing, clenching and in some people - bruxism (grinding).   The masseters if untreated with botox - will eventually get larger and larger with age (hypertrophy).  Botox is an excellent option in reducing the size of this muscle (creating a slimmer jawline) and providing symptomatic relief for patients with TMJ.

No, Botox results won't be permanent. Botox results last 3-4 months. I recommend getting a formal evaluation with a cosmetic dermatologist. Best, Dr. Emer

Botox will always wear off, so the results, even after 10 sessions, will eventually go back to their normal baseline. No one can get a permanent effect from Botox. The effect does tend to last longer after several sessions though, up to about 6 months.Andrew Campbell, M.D.Quintessa Aesthetic Centers

Botox is very effective in weakening the masseter muscle which can be helpful in slimming the appearance of the face and improving symptoms associated with teeth clenching/grinding. Typically the Botox will last longer after multiple treatments. Some people can get 7+ months duration after the muscle has been weakened significantly, however the Botox treatment is not permanent. If the Botox treatments are stopped the muscle will eventually regain stronger contraction. Please consult a dermatologist or plastic surgeon experienced in lower face neuromodulator treatments. Best wishes.

Thank you for your question.  Botox provides temporary relaxation of the muscles treated.  I have found that with repeated treatments, that the duration of action may be prolonged.   For example, if you found that the first masseter treatment lasted 3-4 months, you may find that with repeated treatments the effects may last 4-6 months or longer.  Ultimately, if you stop your treatments, I would expect that the muscle activity will eventually return.