Does masseter Botox thin the jaw bone?

Neurotoxins Like botox, do not affect Underlying structures like bone or fat. Botox works directly at the neuromuscular junction to decrease contraction of muscles. It causes localized paralysis. I hope this helps! Sincerely, Dr Joseph

Masseter botox works by causing atrophy to the masseter muscle. This results in a thinner looking face because the muscle isn't as bulky. It does not do anything to the bone.

Masseter botox can have a slimming effect on the face due to the atrophy of the muscle. Many people with strong masseter muscle feel their face looks boxy and routine botox can soften the apperance