Hi, my daughter has been with the ALF appliance for almost a month, and we cannot answer your question yet. The dentist who made the appliance for her said her TMJ is so compressed, he would have had to make her appliance so tall, that she wouldnt be able to eat. So he's going slowly, providing some vertical support, and hoping that as the upper arch widens with the treatment, pressure on the joint will ease. So far tics have been changing from day to day. Some days are exceptionally good, but others are as ususal.
However, from all I've read in this forum, it seems to me that everyone who went to be checked, even if the appliance did not help, is indeed suffering from some kind of missalignment, or compressed TMJ.
So I'm sending the question back to you, as you are in the dental business and have many connections:
Do we know what precentage of the population is suffering from similar missalignments, and is it different from the percentage in the TS population?
It seems to me that a simple inexpensive experiment can answer the question: x-raying a group of TS and a control group of non-TS, and seeing if a considerable difference in results emerges.
Dalit