Why do some people end up with a mouth full of straight, even teeth, and some end up with crooked teeth or teeth that protrude and cross over each other? Does it have to do with genetics? Childhood nutrition?
The truth is, there are several reasons that some people end up with teeth that are crooked, overlapping or protruding (overbites/underbites). Sometimes, genetics are to blame, but there are many other causes as well.