Could You Please Tell Me How Long the Effects of Botox in the Jaw Muscle for TMJ Will Last?

The good news is that the effects of Botox are not permanent. However, unlike some dermal fillers, Botox is not reversible. The duration of Botox for TMJ can vary for each person. On average the effects of Botox last about 3-4 months.

The good news is Botox is not permanent and you will not look like that permanently.  When treated with a therapeutic dose, the targeted muscle will be inactive for about 3 months.  Your injector may have misdirected the injections, but if the dose administered to the unintended muscles was subtherapeutic, then you should see a return of your normal smile in less than 3 months.  

The good news is that the effects of the Botox injections should be wearing off soon if you had the injections done a few months ago.  Typically the impact is 3-4 months.  I do think that you had the injections done improperly since it is impacting your smile and you are asymmetric now. See someone with experience in treating this area which does require expertise.  I also wonder if too much was injected. 

This is yet another person on realself.com that has been injected in the masseter improperly.  If the Botox is injected too anteriorly, you hit the risorius muscle, which will affect your smile.  I'm sorry you have this side effect but emphasizes that Botox in this area needs to be done by experts, experienced in the anatomy of this area.  I've been injecting for TMJ with Botox since 1995.  A Facial Plastic Surgeon is perfect to see for this injection.  Steve Weiner, MD, Facial Plastic Surgeon, Destin, Florida.