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Dental veneers are custom-designed covers for teeth used for whitening or damage repair.

What can and should I do about a black margin developing between my veneer and gum line?

Christopher Baer (Aurora, CO) on Nov 17, 2011
Small can be a very subjective term, and if you are developing a dark line at the margin of a veneer, it could mean there is leakage around the veneer. Leakage could be due to decay underneath, or the cement attachment could be weakening. Or it could just be stain accumulating at the margin. I would get it evaluated.
Amanda Seay (Mount Pleasant, SC) on Nov 17, 2011
Hi Joel! A dark line between the veneer and the gums usually indicates one of two things. First, there might be a small gap where your veneer meets your tooth that is accumulating stain. Second, it's possible that the cement junction is large enough that it is accumulating stain as well. Your dentist needs to evaluate the integrity of your veneer to be sure there's no decay and that the veneer doesn't need to be replaced.A stain around excess cement can be smoothed and polished off. But if the dark line is due to an open margin or gap between your tooth and the veneer, then the veneer should be replaced with a better fitting restoration.
Kamini Talati (Port Saint Lucie, FL) on Nov 17, 2011
The dark margin may be due to decay. Or, if the veneer had metal under the porcelain, the metal may now be exposed due to receding gums. Please have your local dentist check the tooth.
Ramin Tabib (New York, NY) on Nov 17, 2011
My guess is that the reason you are seeing a dark line around the veneer and gum line is that the tooth has a poorly sealed root canal. These teeth will eventually darken, and as the gum recedes the dark root will be exposed. It may also be the case that the veneer has not been adequately bonded to the tooth. In either case, the veneer needs replacing.
Leonard Tau (Philadelphia, PA) on Nov 17, 2011
There are really two things that could be happening. First, you could have decay at the junction between the tooth and the veneer. In this case, you need to have the veneer replaced. Second, you could have what we refer to as an open margin, which allows food and bacteria to stain the area. Consult your dentist.
Les Latner (Los Angeles, CA) on Nov 17, 2011
This should be looked at by the dentist to make a determination. It might be the edge of the veneer or it might be a slight imperfection at the margin of the veneer with the underlying tooth. If it is collecting bacteria, it could lead to decay.
Michael Apa (New York, NY) on Dec 2, 2011
it would be best to look in to replacing the restorations. we need to know why the gum is receding so quickly, the veneers might not fit properly. if you'd like, please visit my website and schedule a consult.