I’ve clenched my teeth for 9-10 years. It either happened from a bike accident hurting my left jaw, wisdom teeth extraction, or stress from starting a business. All three happened pretty near together. It is not malocclusion, dentist ruled that out.
I clench. No longer damaging my teeth as I have a guard. But I still have tight masseters and neck pain.
I would like to eliminate or reduce the habit. Has anyone succeeded in doing so?
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.