Number 8 of my Invisalign Brace Wont Fit but Number 7 Does is This Normal?

1. Have your dentist first determine the easiest path of insertion for aligners at the beginning of your treatment. Depending on which teeth have the most alignment problems (e.g., crowding, rotation, etc.), the trays may be easier to insert on the right side, left or center of the arch first. 2. Use the Invisalign Aligner Chewie rolls (you can get them on line). "Chewies" are a soft spongy-like plastic roll that looks like a cotton roll. They are reusable and are helpful with... more

If #7 fit and was checked by the dentist, and you wore #7 for at least 2 weeks 22/7, then #8 should fit. It might be very tight and hard to insert at first, but that is normal. If you cannot get it to seat on your teeth, you must continue to wear #7 and see your dentist as soon as possible to see what the problem with #8 is.