Answer:
mouth guard ( yes like the ones in sports)
there are also options that the dentist can give to help with this like a retainer you can use when you are extra stressed for day grinding or at night that stays more out of the way
I would say do both so that they can have a day option with the retainer but a cheap night option from differant levels for if the night grind to hard for the retainer
Step-by-step explanation: