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I have seen people with crowns that look “fake” or that have a dark line at the gum line of the crowns. What causes that?

April 26, 2017causes crowns Dark Gum line look people seen

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I have seen people with crowns that look “fake” or that have a dark line at the gum line of the crowns. What causes that?

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This is usually caused by the metal margin of a porcelain fused to metal (or PFM) crown. In the “old days,” many dentists used PFM crown, but now in most cases, cosmetic dentists use all porcelain crowns, which provide virtually the same strength but are highly superior in their aesthetic result.