Can you make three thin face needles permanent?

Skinny face needle is to inject a certain dose of botulinum toxin into masseter muscle, because botulinum toxin can make masseter muscle atrophy, so it can play the role of thin face, but the effect of thin face needle is not permanent, after injection can maintain 6 to 8 months or so, if continuous injection 3 to 5 times, can make masseter muscle atrophy for a long time, masseter muscle volume becomes smaller.