The reason Sharks don’t get cavities is thought to be because - TopicsExpress



          

The reason Sharks don’t get cavities is thought to be because they are constantly shedding teeth. Sharks have 40-45 teeth, with up to seven rows of replacement teeth behind them. When a front tooth breaks or falls out, it takes only about one day for a replacement tooth to move forward to the front row. Sharks can go through more than 30,000 teeth in a lifetime. Newer teeth are always larger, so sharks can look scarier as they age.
Posted on: Thu, 08 Aug 2013 13:49:50 +0000

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