Ask HN: Has anyone fixed their own bruxism?
Being that this is Hacker News, and thinking completely off the top of my head...I fixed my sleep apnea by sleeping with an oxymeter on. When breathing was obstructed, my blood oxygen dropped. The oxymeter beeped and woke me up. I changed positions, and went back to sleep, ultimately changing sleep habits to the point that I can get through most nights without awakening. I was able to avoid using a CPAP that way.Perhaps a muscle tension sensing device, such as https://www.sparkfun.com/products/13723
 could serve a similar function. Place the sensors on your jaw muscles while you sleep (may only need to be one of them) and if you clench, it beeps or buzzes and wakes you up. May take some inventiveness to integrate it with power and alert, and then to get it comfortable enough to sleep in. And you'd want to avoid any cords that could wrap around you.It may not lead to a cure, but might give you  an idea of what's going on when you clench at night.