Dental floss catches under one of my new porcelain veneers. My dentist thinks it’s not a problem because the catch is below my gumline. I am concerned about whether the area can trap bacteria and lead to a cavity. Should I ask her to replace the veneer? Thanks. Renae from TN
Renae,
Porcelain veneer
From what you’ve described, it sounds like your veneer has an overhang. This occurs when the impression taken after tooth preparation for veneers fails to accurately capture the margin. As a result, the lab technician can’t make the veneer fit the tooth smoothly. Instead of a seamless gumline contour, there’s a ledge where the veneer and tooth meet.
Ideally, the veneer should mimic the original tooth contour at the gumline. When this doesn’t happen, as shown in the lower example of your drawing, the result is a noticeable overhang.
What Are the Risks of an Untreated Overhang?
An overhang isn’t just a cosmetic flaw—it can affect your oral health in multiple ways:
- Decay under the margin: While not guaranteed, decay can form just below the edge of the veneer.
- Gum problems: The gums are almost certain to react negatively. Expect puffiness, redness, or even bleeding, all of which can progress to gum disease.
The best step is to ask your dentist to replace the veneer. If she refuses, you may need to find another dentist to correct the problem. Until then, be extra diligent with flossing. Slide the floss under the overhang at least once daily to minimize irritation and reduce the risk of decay.
Sugar Land, Texas, dentist Dr. Siny Thomas of Cornerstone Dentistry sponsors this post. Read about Dr. Thomas’s commitment to giving his patients the best dental care possible.