Also found this article:
http://news.nationalgeographic.com/news/2006/02/0203_060203_viking_teeth.html
Says that vikings filed their teeth for ‘beautification’. Not stated in the article being commented on, but interesting bit of information.
Looks like they had a particularly brutal orthodontists! Been there, done that. The ancient Maya used to file theirs to points, and inset turquoise and jade stones, just like our rap stars inset their teeth with diamonds.