Why Do I Still Have Space Between my Teeth?

This is a GREAT question and one that should be discussed with your dentist. Invisalign is a fine tool for moving teeth but sometimes the teeth don't behave in nature the way the computer generated model predicts they will behave. When you have worn all of your Invisalign aligners and you are not satisfied with the results then a "case refinement" is done. This normally intails taking new impressions and basically starting over from where you are. These case refinements are usually accomplished in three months or less and don't usually cost additional money, unless your original treatment was 10 aligners or fewer, then there could be a nominal fee. 

Sometimes there are excess spaces at the end of treatment because your teeth are small or misshaped. If this is the case it most assuredly would have been discussed with your dentist before treatment began.

Good luck!

Sometimes teeth don't move as expected, so a mid course correction is done. This is simply done by additional impressions and new aligners. Often a single correction is included in the original fee.

Spaces can be closed with Invisalign. You will need to have additional aligners made to close those spaces. At the same time other details can be addressed with those additional aligners. You will be fine.