I have five porcelain crowns with the metal framework. I think they’ve been on for about 12 years now. I want to know what type of metal is used, although I guess I should have asked that before I got these crowns, and I want to know if the metal is causing the black line at my gums. I’m thinking about getting the crowns replaced, and I want to know what kind of metal to ask for so this won’t happen again. I am also getting three veneers on my upper teeth and want to see if I could experience the same problems with dark gums. Thank you. Lenny from TN
Thank you for your question.
Why Do Porcelain-Fused-to-Metal Crowns Turn Dark?
Porcelain-fused-to-metal (PFM) crowns form a dark line near your gumline eventually because of their foundation. PFM crowns have a foundation made from base metals or noble metals. Nickel and chromium are the base metals; gold, platinum, and palladium are noble metals.
A noble metal framework fits better, causes less sensitivity, and is less likely to corrode.
Although a dentist might try to hide the metal framework under the gum, after several years, the gums recede, and the black line is visible anyway. When a ceramist cuts the metal back near the gumline, the black gumline will be less visible. Partially masking the metal requires the crowns to be opaque, which will give them a pasty look rather than looking like natural teeth.
All-porcelain crowns don’t have a metal foundation. So, you do not have to worry about developing the black gumline. An artistic cosmetic dentist will give you beautiful crowns that match the color and translucence of your natural teeth. If you select a cosmetic dentist for your new crowns, people will not notice that you have crowns on your teeth.
Will Your Porcelain Veneers Turn Dark at the Gumline?
Porcelain veneers are all-ceramic and do not contain metals. Your veneers will not turn dark around your gumline.
Choose a skilled cosmetic dentist to replace your crowns and give you veneers. You will get natural-looking results.
Dr. Jerome Cha of Tulsa, Oklahoma, sponsors this post.