I have a nightguard for when i sleep because i grind my teeth, and let me tell you what a difference it makes!!!! I actually need to replace mine because I ground it down!!! My poor teeth! I have TMJ and the night guard makes a world of difference. They are pricey about 500-700 bucks, but ive had mine for 3 years and sleep is sooooooooo important for us, so anything we can do to help it we should!!