Was at the dentist last month and while the assistant was looking at my teeth she suggested I may be a candidate for Invisalign.  Had braces as a teenager...now 30 years old.  Got molds taken last month and was advised that I am a candidate for the "Express."  Went yesterday and got first two sets of trays.  Teeth are sore, but would not say it is painful.  Before the initial trays...