Botox exserts it's therapeutic effect by blocking neuromuscular junction, which resultis in paralysis of targeted muscle. However, therapeutic effect lasts 3-6 months. The clinician really needs to know whether mechanical blockage of tmj is present or not. Seeing a competent tmj specialist is advised.
I am seeing a specialist and have done this, to no avail. Have you heard of Botox for it?
Trismus is a common complacation after lower molar extraction. However, it tends to resolve within a week if appropriate antibiotics is administered. Another common cause of trismus is disc displacement without reduction. If there is no disc pathology involved, application of cold spray along masseter muscle , restoration of normal rang of motion is generally immediately restored. Seeing a tmj specialist is advised.