JonSher,
TMJ dysfunction can be created by the improper mechanics of the jaw. A normal functioning jaw should pivot first (when opening) and then slide forward to open wide. Things like forward head posture, prolonged dental procedures, traumas/blows to the jaw over the years, sleeping with jaw open, constantly chewing food on one side etc can all create an abnormal functioning jaw. As a result, pain may ensue.

As a chiropractor myself, our function is primarily one thing - to restore the function of the nerve system control over the entire body. The spinal cord which is housed inside the vertebrae send branches of nerves to heart, lungs, liver, muscles of the arms, legs trunk etc and also the muscles that control jaw function. Any misalignment in the spine can create irritation of these nerves. The result is a decrease in the function of both the nerves and associated muscles they control. In your case, there may be problems in your spinal nerves that are interfering with your jaw's ability to open and close properly.

Only a specific chiropractic adjustment can remove the irritation to the nerve system. If you have forward head posture, this can result in a tightening and abnormal function of the muscles of the neck, chest and jaw, resulting in TMJ dysfunction. The key here would be to get checked and find out if this is true in your case.

Some chiropractors may work with your jaw misalignment as well. Through gentle adjustments, they may be able to not only correct the problems in your spine, but also work to restore optimal rotation and gliding of the jaw joints. A thorough chiropractic examination is the way to go.
Hope this helps, Let me know if you would like help finding the right chiropractor in your area.
Haze