Basically, rabbits grind their teeth with plaster (which looks like a string hanging from a cage), wood (which is put in a cage in bulk or bitten by a rabbit standing on a cage) and a rabbit grinding stick (carrot flavor).
You can find them in pet shops, but don't buy dogs. Oil and smell are not cheap.
If you really can't buy it, buy it rabbit alfalfa grass and big bags of hay. I think it's also quite tiring. It will take a long time to eat the next one.