As my dentist is on vacation and when he returns it will be time to change to the 4th aligners
I Lost my Upper 3rd Tray of my Invisalign After 5 Days, Can I Go to Tray 4 for the Uppers Until I the Bottom Catches Up?
Doctor Answers 3
What to do if You Lose an Invisalign tray
If you only wore the 3rd upper tray for 5 days, you should go back to wearing tray #2, and have your dentist order a replacement tray #3 which you will begin to use as soon as it is received,
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I would do what you suggested. Call your Dr and get in to see him whem he comes back. He might want to remake 3 tray for you.
Probably you can do this. But I would contact your dentist for sure to determine. It's hard without knowing the specifics of your case