The reason you are being charged for all these extras is because invisalign express does not include in it's cost any refinements, adjustments, retainers, etc... Hence why the cost is so much cheaper than regular invisalign, which covers most of these things in its price. I was told that my case would take ten aligners but any tweaking or refinements would cost extra. I went with the regular invisalign for this reason. Hopefully it all works out well for you and you don't need any of those extras!
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Posted to My Invisalign Express Story - Bay Area, CA on 8 Feb 2012