The plan is to do 7 extractions. 3 wisdom teeth and four molars to make room for my front teeth to move back. Once the extractions are done I have quite a few cavities needing to be filled, and a cleaning. Once all that is done he says we can start the Invisalign journey. He guesses that it should take between 8-12 months. From the stories I have read, this seems too fast for the severity of my crowding. Can anyone explain how it could possibly be this fast?!