Everytime I skip Invisalign for a day my teeth totally separate - this is my last tray that I've been wearing a year. Normal?

The process of Orthodontics naturally causes bone to become less firm around teeth until a period of retention has been achieved. This usually takes several months after the last movement has been completed.  It would be completely natural for your teeth to be able to drift if you're leaving your aligners out for any period of time. I highly recommend that you discuss with your dentist the proper way to wear your trays and get into retention and wear your retainers the way you're supposed to and you will most likely end up with a beautiful, stable result.Douglas Jopling,  DDSDallas, Texas area

Hi!  If your teeth separate still after months of the same invisalign tray, it means that the fibers underneath the teeth still remember where your teeth postion are and wants to return; and/or that there is a frenum preventing the teeth to come together.Either way, it seems unstable.  You may need a frenectomy and/or a fiberotomy.   Please see your dentist to evaluate.Another option is to do a lingual bar however the bad part is that you can't floss well in the area and thus, cause gum problems over time.Hope that helps!