Wednesday, August 25, 2010

Lips and teeth

Why are lips and teeth so important in American (and other first world countries) culture?

How have views on teeth changed over time?

How many people, on average, have or have had braces at one point in their life?
  • how many years do most people have braces?
What is the importance of having nice teeth?

How many people, on average, recieve collagen injections for the lips each year?

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