I tried the box with the week's worth of strips, the strips that you have to leave on for 30 minutes at a time. They worked phenomenal but they are a pain in the ass to put on and keep on because sometimes they slip out and since you can't swallow the gel on those strips you tend to drool/make a lot of saliva. But overall, if you want a big change then you should really use them, they work very well and you will not regret it
haha omfg, while putting on my creststrips, i just saw this thread. But yea to some people it's really sensitive to them and it hurts them. My sister says its really painful for her, but luckily i dont feel a thing using them. If u do use them, try not to skip a day b/c it wont be as efffective as doing them daily.
But my dentist put some clear (what looked like nail polish) on my teath when I was younger to prevent cavaties. Apparently its peminet and they can tell by the xrays if you've had it applied or not. In any case I've never had a cavaty in my teeth.
So i don't know if the stuff in those things would fuck with that or not. I haven't had a chance to ask him about it either.