A dental crown is a long-lasting solution to protect a compromised tooth, but it can also be used along with other procedures, like root canal therapy. They can last for many years with the correct care. However, over time, you may notice a dark line forming near your restoration where your crown meets your gum line. The blemish can be caused by many factors, like gum recession. Your dentist will determine what’s causing the imperfection and what can be done to improve its appearance.
Common Causes of Black Lines
A dental crown is a custom-made restoration that covers the entire surface of a tooth down to the gum line. Over time, a dark line may form near your gum line, which can be caused by:
- Gum Recession: Your gum line can pull away from your tooth, exposing the root surface. It can be caused by gum disease, poor oral hygiene, aggressive brushing habits, and teeth grinding. Besides the gap between your crown and gum line, you may also experience sensitivity to hot and cold foods and drinks.
- Material: Crowns can be made from many types of materials. Restorations with a metal base can cause a dark line. The color of the crown can show through the gum tissue. This isn’t a concern when choosing all-ceramic crowns.
- Fit Problems: If your restoration doesn’t fit correctly, it can be difficult to keep it clean, which can increase your risk of cavities, infections, and gum recession.
Treating Black Lines Near Crowns
No two situations are identical, but replacing the restoration is the most common solution. Your dentist will use a special dental tool to break the bonding seal holding your crown in place. After popping off your crown, you may require dental work, like addressing decay or gum disease.
After any prep work, your dentist will take an impression of your tooth using state-of-the-art technology. The scan will work with advanced CAD/CAM software. Your dentist will set the specifics for your restoration before sending the information to an in-office milling machine. The machine will cut your crown from a single block of all-ceramic material. In about 1 hour, your crown will be ready to bond to your tooth. There’s no need for a temporary restoration or a second appointment.
Although your crown will be metal free, it will be durable and can last for a decade or longer with the right care. You can get the most from your investment and prevent a black line by brushing, flossing, and visiting your dentist regularly.
About Dr. Mark E. Lawton
Dr. Lawton has over 2 decades of experience in dentistry. He earned his dental degree at the University of Texas Health Science Center and has continued his training regularly in various specialties, including CEREC, cosmetic dentistry, and more. Request an appointment through his website or call his office at (832) 353-2962.