That is an excellent question. You cannot be sure without a consultation and then x-rays as well and we always recommend that. If you are far away and want to get an idea you can always call us and then email us some closeup photos of your smile in advance.
However, if you are just interested in moving a few of your front misaligned teeth that are not too heavily out of alignment, you most likely will be fine for express treatment. If you want to correct extremely crowded teeth, your bite on your back teeth, extremely large spaces or many spaces between teeth, significant overbites then you would need a full Invisalign treatment.
A slight overbite is usually a good situation to correct with Express Invisalign. However, if you signup for express just as you signup for the full Invisalign treatment, you can always get a refund if not a candidate. We can also upgrade your from an Express case to a full case as well if you choose after consultation.
Dr Ken Feiler
Apr 23, 2013