They are sensitive to air and even just when I'm drinking room temperature water especially the bottom ones. It feels like whatever I drink its going straight through them and onto where they were shaved down. My dentist said it only last a few days up to a week.. And they are also loose. I can wiggle my front two pretty easily. And its uncomfortable when I'm eating because it feels like they could fall off. Also my dentist said they can be loose when they're first bonded on? Is that even true?