American Association Of Veterinary State Boards (AAVSB) Practice Exam

Which species has continuously erupting incisor teeth?

Pigs Cats Rabbits Ferrets

Correct Answer:

Rabbits

Explanation:

Rabbits have incisors that grow continuously throughout life. This is due to their hypselodont dentition, where the incisor teeth keep renewing and require ongoing gnawing to wear them down to a functional length. This adaptation supports their herbivorous diet and the abrasive materials they chew. In practice, overgrowth of rabbit incisors can lead to malocclusion and difficulty eating, which is a common dental concern for this species. The other animals have incisors that reach a mature length and then stop growing, so they do not continuously erupt.

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