Getting a good look at your rabbits' teeth requires reasonably tame rabbits! Gently pull back the rabbit's cheeks and check that the teeth are nice and sharp and have been worn down evenly.
A rabbit's teeth are very important to them, so it's important they're in good condition
The top teeth should overlap the bottom ones slightly. If you are worried that your rabbit's teeth are getting too long, make sure that they are eating plenty of hay as it is the most abrasive part of their diet.
Sometimes, through bad diet or genetics a rabbit's teeth can overgrow. If this does happen then your vet will need to burr the teeth down.