For the temporary crown stage that you have for a week or two, when you have the plastic crown(s), be careful of biting foods that are too hard or sticky. Floss if you can, but pull the floss out the side of the tooth, as opposed to back up/down from where it came as it might pull off the temporary crown. If that temp does come off, let us know so that we can re-cement it for you to protect that tooth until we get the permanent one in place.
For the real final crown, we use cements that set immediately, but still be wary of the new tooth for a couple of days as your tissues and bite get used to the new addition. If the bite is not right, contact us so that we can get you in to make that adjustment that will make it feel right.