Angie1

I would say no. Anything except water will cause cavities, as the saliva is not "washing" your teeth 24/7 as when there are no liners.

Don't be nervous! The "shaving" is just them filing a microscopic amount off the SIDE of a tooth, similar motion to flossing, with a slim flexible metal "saw". Does NOT touch gums. You cannot tell by looking at your teeth that it happened, you would need a magnifier. The dentist slides a spacer between teeth and if it doesn't go in, they know in order for a tooth movement to happen they need to "shave". I had it done many times.

Welcome to the club, I think you will like the results (if not the process!). Excess salivation will go away, as will the feeling of something in your mouth for the most part. Also lisping when you talk for a few weeks is common. It is all about your tongue getting used to the "foreign body". I kept mine on about 20 hrs a day, but you will have to see how you do. If the next set are really tight, then you didn't wear the previous set long enough. And if you are really "bad" the next set won't fit at all you have to wear the current set longer and then you will fall behind in your schedule. So it is kind of trying to find out what is right for you trial and error. Dentist will say 24 hrs a day is optimum! I kissed with them in and it was not noticed by the other person...:). Buttons are no big deal, you only feel them when you have the aligners out. And shaving between teeth periodically is a breeze. Good luck!

PTBLOGGER: Yes, I smoked a pack a day for the two years I wore Invisalign - and it did no harm to my teeth or the aligners that I can tell, and the dentist and hygenist never mentioned they looked bad. Of course they told me before I started that I should not smoke with them on... I kept the aligners clean with Polydent tabs every week, and gently brushed the aligners with toothpaste daily (when they were out of my mouth). Do this in the palm of your hand and always one tray at a time.

yes, my dentist and I call my trays "liners".