I'm interested in Invisalign, but I spend half of the year in the U.S. and the rest in Asia. How difficult would it be to get the Invisalign in the U.S. knowing I will not be able to go to the appointments every 6-8 weeks. Would it be possible to find a Invisalign provider to help me in my scenario? What about getting the Invisalign in the U.S. and switching to a dentist to monitor the treatment here? Or is there any possibility that I could get digital X-rays, or sent to the U.S. dentist?