Teeth: a future renewable natural resource?

Most vertebrates have continuous tooth generation, meaning that lost teeth are replaced with new teeth. Mammals, however, including humans, have teeth that are generally only replaced once, when milk teeth are replaced with permanent teeth.

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<p><a href="http://www.physorg.com/news83345072.html">Teeth: a future renewable natural resource?</a></p> <p>Most vertebrates have continuous tooth generation, meaning that lost teeth are replaced with new teeth. Mammals, however, including humans, have teeth that are generally only replaced once, when milk teeth are replaced with permanent teeth.</p>