Can the Removal of Invisalign Attachments Cause Dulling of Enamel?

I just picked up my Invisalign Express trays yesterday and had attachments placed (2 upper, 4 lower). I was concerned about damage to the enamel upon removal, even at the time of putting them on. Unfortunately, today, I had two removed and replaced by the orthodontist, who assued me there would be no damage. Well, immediately after he replaced them, I could see that my tooth surface on both teeth was dull, lacked shine and was dried out. Is this permanent??? Or, do they need to re-mineralize?