If you’ve noticed a dark or black line forming at the base of your dental crown—especially near the gumline—then you’re far from alone. This is an issue that many patients who’ve undergone restorative dentistry in the past seem to report, and it commonly occurs with dental crowns that have a metal base. Needless to say, this can detract from your smile’s appearance, not to mention call into question the remaining durability of your existing crown. Fortunately, while it’s not a serious, health-threatening issue, it’s still something that your dentist can easily assist you with. Here’s what you need to know.
What Causes Black Lines to Form Around Dental Crowns?
The dark line you’re seeing on your crown is most likely caused by an older type of crown known as a porcelain-fused-to-metal (PFM) crown. These crowns have a metal substructure that lends them strength and stability once bonded to teeth, and they’re covered with a layer of porcelain to ensure a natural appearance.
However, over time, several things can cause this metal edge to become visible. Gum recession due to poor oral hygiene might cause the surrounding gum tissue to recede, revealing more of the crown. Wear and tear that stems from everyday use can also gradually wear down a crown’s porcelain layer. In rare cases, if the crown was improperly placed, the dark line can begin to show much sooner.
What Should I Do If My Crown Has a Black Line?
While this line isn’t normally a health concern (unless it’s the direct result of an untreated dental issue like gum disease), it can certainly impact the appearance of the crown, especially if it’s on a tooth near the front of the mouth. However, it’s not something that can simply be washed away or hidden; it’s part of the crown, meaning that the crown will need to be replaced. Luckily, this is a very simple task for your dentist!
Metal-free crowns are made entirely from tooth-colored materials, often zirconia or all-ceramic porcelain, and as their name implies, there is no metal whatsoever. However, no structural integrity is compromised by using these non-metal materials, meaning that you’re opting for a new restoration will look great and function optimally for years to come. Plus, these restorations are also more biocompatible and gentler on gum tissue.
If a black line around your crown is making you self-conscious, you don’t have to live with it—modern dentistry now offers many advanced solutions that are both beautiful and functional!
About the Practice
Our team here at Hanford Family Dental Center has proudly served the needs of patients in Hanford and the surrounding area for several years, offering a wide range of services, including restoration solutions like dental crowns. If you have any questions about the blog or you’d like to get in touch with us to schedule an appointment, please reach out online or call today for more information. Telephone: (559) 530-8080.