Teeth are not a reliable way to tell a rabbits age. They discolour through food rather than age....I have had one year olds with yellow teeth while my three year olds are pure white. To some extent tooth wear is helpful but as they grow constantly anyway :roll:
Mostly they cane be narrowed to less than one year, between 1 and 2 years and then it gets harder until your hitting around the 5/6 year mark!