Since my dentist put 5 attachments on my bottom teeth a few days ago, it has been very difficult and painful to remove my Invisalign bottom tray. Every time I do, I expect a tooth to come out with it. I noticed today that the bottom teeth are slightly loose now. I know this is normal but I am terrified of losing a tooth. Are the trays strong enough to pull out an otherwise healthy tooth? What is the best process for removing the tray to hopefully avoid any such risk?