I just got my Invisalign yesterday. I have some gumline recession on a few of my teeth, and attachments were required on some of those teeth. The dental assistant put the clear bonding agent on two teeth, coating them up to the gumline. They are now hardened shells covering both teeth entirely. Will this do any damage to the teeth if left on for the entire Invisalign treatment (9-10 months)? Also, how will they get it off? I'm afraid drilling/sanding it off will hurt since it is so sensitive!