TMJ therapy can involve many different things and can be complex.  If
the problem if do to grinding, then an appliance can be fabricated to cut
down on the damage and help with joint placement.  It can also be that
the teeth are not aligned in a way that is favorable for the joint.  In this
case an appliance can be made or sometimes an equilibration of the
teeth could be necessary.  If the problem is from the joint itself, then a
different appliance can be made, or possibly surgery could be indicated.  
If the problem is from the facial muscles, then therapy of the muscles
must begin to relax and stretch them.
TMJ Therapy