How Much Do Braces Cost In 2010 Questions About Professional Teeth Whitening?

Questions about professional teeth whitening? - how much do braces cost in 2010

I want to bleach my teeth professionally, if I get my key, May 2010.

1. How?
2. either permanently or should be reset?
3. How does it know? (mine is now considered normal opaque color. yellowing, just annoying)
4. What are they?
5. Is it worth it?