What is that black line I see around the gumline of my crowns (or other people’s crowns)?
The black likely indicates that there is metal underneath the white porcelain part of the crown. The black line you see around the crown was probably not there when the crown was placed. Over time, chronic inflammation of the gum tissue causes it to bleed easily and perhaps recede from the metal, exposing it. No longer is it necessary to have metal in crowns or that unattractive dark line. Drs. Estep and Boulden use all-porcelain restorations.
The black likely indicates that there is metal underneath the white porcelain part of the crown. The black line you see around the crown was probably not there when the crown was placed. Over time, chronic inflammation of the gum tissue causes it to bleed easily and perhaps recede from the metal, exposing it. No longer is it necessary to have metal in crowns or that unattractive dark line. Dr. Soyombo use all-porcelain restorations.
