Invisalign does not hurt it takes time to get your gap teeth straighten. It very clear ppl can not even tell that you haveWhat are invisalign for? Is it to straighten up your teeth or close gaps? I have gaps on the top upper part of my teeth and I hate it. I want to get my teeth fix to close the gaps. Does getting braces hurt alot and if you have cavities, do they take out the ones that have cavities before you can get braces and another question, can invisalign close gap and does it hurt?