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16/04/2014 04:17:16

Author Topic: Why do humans have two sets of teeth?  (Read 7109 times)

sarah

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  • on: 22/06/2008 18:55:33
sarah urquhart  asked the Naked Scientists:
 
We were just wondering - Why do humans get 2 sets of teeth?

Sarah
What do you think?

Bored chemist

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  • Reply #1 on: 23/06/2008 18:38:05
I think the simple answer is that they have a little set for when they are little and a bigger set for when they are bigger.
Another question is why only 2 sets?
replacing them regularly might be useful for when they get damaged.

lyner

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  • Reply #2 on: 23/06/2008 18:47:53
Sharks do it!
Rodents have 'open roots' in their incisor teeth so they keep growing and growing to keep up with the wear. I often think that could be useful too. But, as we're only designed to live to about thirty, the second lot only have to last twice as long as some of the first lot.

iko

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  • Reply #3 on: 23/06/2008 20:31:00
Sharks do it!
Rodents have 'open roots' in their incisor teeth so they keep growing and growing to keep up with the wear. I often think that could be useful too. But, as we're only designed to live to about thirty, the second lot only have to last twice as long as some of the first lot.

Right sophiecentaur,

at the beginning of the last century, average survival was 35 years.
At least in my country.

Alan McDougall

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  • Reply #4 on: 25/06/2008 20:28:13
Because this is the way it is, but man!!/girl!! we should have been given three sets by the big guy, really

 

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