What type of tooth grows continually throughout the life of an animal?

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Aradicular hypsodont teeth, such as those found in horses and rodents, grow continuously throughout the animal's life to compensate for the wear and tear of grinding tough plant material. Brachyodont teeth, found in humans and carnivores, stop growing after reaching their adult size. Heterodont teeth refer to teeth with different shapes and functions, but do not indicate continuous growth. Radicular hypsodont teeth, also known as rootless hypsodont teeth, are found in some species such as kangaroos and also grow continuously, but the term "aradicular" specifically refers to teeth without roots.

What Type of Tooth Grows Continually Throughout the Life of an Animal