All the time! My entire life I've chewed on inedible stuffs of all kinds. Pen caps, bottle caps, plastic figurines, toys, tons of stuff that probably isn't good for my teeth lol
Nowadays I have teethers and a good quality baby paci that I like chewing on. Those things are made to take a beating even though they were made for babies so you should have no problems going to town on one of those as long as they're not bad quality like a dollar water teether for example.
I suggest Nuby IcyBite key teether and leaving it in the freezer for about an hour. That thing is amazing!