I do a fair number of Botox injections for TMJ (only small doses (5 to 7.5 units) when using Botox for migraines. Patients do report that it is helpful.

In refractory cases, I have had clinical success with injecting the superficial temporalis muscles using 5 units per site given 1-3 sites per side. I tend to inject into the part of the muscle that is most active when the patient bites down. This, of course, is in addition to the injection of the ma...

I also do this, by adding 1-2 injections in each masseter. 5-10 units per site. Works really well though I generally have to back down the dose eventually due to muscle atrophy.

The preferred terminology is TMD as opposed to TMJ. I have found botulinum toxin much more effective for the treatment of TMD than for chronic migraine, with the benefit that can last 3-6 months or even longer. For TMD, it can be used by itself or, better, in combination with appliance therapy to pr...