Remove The Dark Line Around your Crown(s)
If you have dark lines around the edges of your crown, the dark line is the metal underneath the porcelain that is showing through. You may eliminate the dark line with an all porcelain crown. Existing crowns will be removed and replaced with all porcelain crowns. If there are multiple front teeth involved, then replacing them all at one time typically gives the best result because the shading/coloring of your teeth will be consistent.