Saw this in an issue of Chatelaine Magazine (March 2007, p 46). People with severe TMJ pain (the discomfort may extend to earaches, headaches, tooth pain, and facial/neck pain) may be able to get some relief by receiving Botox injections. However, multiple treatments may be required (at $400 a shot) and there may be side effects. My current recommendation is to stay with stress relief and the fabrication of a custom mouthguard if your case is mild to moderate.
Here's the teaser quote:
In the same way it paralyzes the muscles that cause wrinkles, Botox relaxes the tight, inflamed muscles around the jaw joint....patients usually see results in 2 to 3 weeks. Some people find long term relief after one session, while others need 2-3 sessions and then an injection every 3-6 months. The side effects can be...flu like symptoms for a day or two or some weakness in the face.
Hans Skariah, B.Sc., DMD
Promenade Court Dental Health Group in Mississauga
2233 Hurontario St., Mississauga, ON, Canada
(1/2 km north of the QEW in the Dome Building)