Q. I had some small lower front fillings replaced the other day, by a dentist new to me. I’m pleased overall with the look of them but towards the end of the session, I realised he was using something a bit like a nail file. I thought he must be shaping the filling material but discovered when I came to pay that ‘tooth reshaping’ was on the list of treatment. I didn’t want my teeth reshaped and since this work was done, about 2mm down the front from the top of two of the teeth has been feeling slightly rough to my tongue. Today, a small piece of something flat and almost transparent came away when I brushed my teeth. I’m worried that the dentist has caused some fracturing of the enamel and whether this will put my teeth at risk. They feel a bit more sensitive than they did. Could this be put right by a thin smeer of resin? I wish I’d asked what he was doing when he started using the file, or whatever.