Arpit Verma Posted April 25, 2016 Share Posted April 25, 2016 (edited) After teething, toddlers bear bright white pearl-like teeth. Years later, one by one, baby teeth fall to give place to stronger permanent teeth that are supposed to endure the rest of human lives. In the dawn of humankind, two dentitions were enough. Humans did not live long, so permanent teeth lasting 30 or 40 years would accomplish their function. As human lifespan extended, human teeth could not keep pace with longevity. Read more advertising removed Edited April 25, 2016 by Phi for All ad link removed per rule 2.7 Link to comment Share on other sites More sharing options...
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