Q. Hi, I had a crown fitted onto my front tooth a year ago to replace a vaneer that broke off. Where the crown touches the gum it is slightly red and when I smile you can see the redness on my gum, making me smile less. My dentist at first said I could be a little sensitive to the crown and to brush it better. This has not changed it and it still looks slightly red. It has never caused my any pain, just looks quite obvious……what could be causeing this. Many thanks,