Have you ever seen a picture of a snail in a dentist’s waiting room? You probably won’t find one or one of sharks or crocodiles either. For one, crocodiles are scary and sharks, while beautiful in their own way, are also creepy.
What do all these creatures large and small have in common? They are all part of an evolutionary path that allows them to engage in a type of do-it-yourself dentistry. It’s probably common knowledge that sharks have multiple rows of teeth. The number of teeth per row will varies from species to species but essentially each tooth just falls out when it has done its job. When the tooth is gone the tooth in the row behind simply takes its place. This natural tooth replacement system allows them to use over 30,000 teeth in their lifetime! Crocodiles don’t fair quite as good when it comes to tooth loss and replacement — Wikipedia reports that they only lose only 3,000 teeth in their lifetimes! [Read more…]