Will movement begin returning before 3 months post botox injection?

How
long Botox lasts depends on how much of the substance is injected. It would
be helpful to know the exact amount of units you were injected with, but
again the results vary from patient to patient and also depends on the
strength of the muscle. As you stated you were injected with a small amount,
it is possible that you could start to regain movement within this time. Many
patients report they start getting movement back after 11 or 12 weeks. 

Thank you for your question. As with other medications and supplements, people metabolize fillers and injectibles - such as Botox - at different rates. I typically use approximately 20 units of Botox per each area (glabella, crow's feet, forehead), which gives my patients the desired results they are looking for. Botox typically lasts about 3-4 months depending upon the volume injected. 

Bruxism or grinding of the teeth can be successfully treated with BOTOX if injected correctly into the 3 major muscles (masseters,  temporalis and lateral pyterygoids) that cause it.  By relaxing these muscles teeth grinding during sleep resolves.  BOTOX injection should last between three to four months depending if it is diluted correctly and not over diluted and properly injected.  If relief is not felt after two weeks you should return for a "touchup" in order for it to be effective.
This is not a permanent fix and needs to be repeated every three to four months.  The injections help to reduce the strength of the muscles and size of the masseter muscle.  A long term advantage of repeated treatments to the masseter muscle if enlarged due to teeth grinding is shrinkage of the muscle and a more relaxed and natural appearance and a more narrow jaw line.