I found started wearing my mouth guard (you can get them for if you grind your teeth when you sleep) to give the inside cheek a bit of a rest from being constantly irritated.
I want one of these. I went to the dentist for one and they said they'd get back to me but nothing ever came of it. I grind my teeth a lot, and clench my jaw a lot.
It does sometimes happen with food, but mainly with gum. I think because a piece of gum is much smaller than anything else i chew when I put it in my mouth.
I tried chewing slower, but every now and then I would lose control and a powerful bite would just snap in my jaw and it's ok until I bite myself on one of those powerful snaps.
I did also used to play clarinet and sax, so that could also have contributed to scewiff bite i suppose.