You catch your reflection while laughing at a joke, and there they are: small dark gaps at the base of your front teeth that were not there a few years ago. Black triangles can make even a healthy, well-cared-for smile look older or less polished than it really is, and once you notice them, it is hard to unsee them in every photo.
At Evergreen Grace Dental, we hear this concern often, and the good news is that black triangles are one of the more fixable cosmetic issues in dentistry. Whether you have a small gap between your front teeth or a more noticeable one that has developed over time, we can explain what is causing it and the options available to close it.
What Causes Black Triangles in Teeth?
Black triangles, sometimes called open gingival embrasures, form when the small triangle of gum tissue between two teeth, known as the papilla, no longer fills that space. Gum recession is one of the most common causes, as gum tissue pulling back due to periodontal disease or aggressive brushing can cause the papilla to shrink along with it. A 2025 narrative review on gingival esthetics notes that interdental papilla loss, commonly called the black triangle, remains difficult to correct with both surgical and restorative procedures.
Tooth shape plays a role too. Teeth that are naturally more triangular, wider at the biting edge and narrower near the gum line, tend to leave larger gaps than teeth with a squarer shape. Orthodontic treatment or bone loss from gum disease can also reduce the support that once held the papilla in place.
Why Black Triangles Matter for Your Smile and Oral Health
Black triangles are often thought of as a purely cosmetic issue, and a gap you did not have before can make your smile look uneven or draw attention away from teeth that are otherwise healthy. There’s also a health side, since those small spaces can trap food particles and plaque that are harder to clean out, raising your risk of decay and gum irritation around the affected teeth.
That’s why we recommend having black triangles evaluated rather than assuming they are purely cosmetic. During a visit with our general dentistry team, we can check whether gum disease, bone loss, or another underlying issue is contributing to the gap so we can treat the cause.
How We Treat Black Triangles at Evergreen Grace Dental
Treatment depends on the gap size, your gum health, and what you want your smile to look like at the end. For smaller gaps, we often recommend cosmetic bonding, using a tooth-colored composite resin to gently reshape the sides of the affected teeth without anything invasive.
When the gap is larger, porcelain veneers can offer a more complete solution by adjusting your teeth’s contours while also addressing color or shape concerns. For patients whose black triangles stem from crowding, clear aligners can gradually shift teeth into a position that naturally reduces the gap. If gum recession or periodontal disease is the underlying cause, we treat that condition first through our periodontics services.
What to Expect During Your Visit
Every treatment plan starts with an evaluation, and we want you to feel informed at every step. Here is what that process typically looks like:
- Evaluation: We examine your teeth and gums, checking for recession, bone loss, or tooth shape as contributing factors
- Discussion: We talk through your goals for your smile and how much change you are comfortable with
- Digital imaging: We may use our in-house dental technology to show you a preview of potential results before any treatment begins
- Treatment planning: We recommend the option or combination of options that best addresses your gaps and any underlying gum health concerns
Once we have a plan in place, we walk you through timing, what to expect during treatment, and how to care for your smile afterward so your results last.
Fix Black Triangles in Teeth With Evergreen Grace Dental
Black triangles can feel like a small thing until you notice them every time you smile, and you do not have to live with them once you know they can be treated. Dr. Bartolo Espana and our team at Evergreen Grace Dental have spent over a decade helping patients throughout Renton restore the appearance and health of their smiles with treatment plans built around each person’s specific needs.
If you have noticed gaps forming between your teeth or simply want a professional opinion on your smile, we encourage you to reach out. Contact us today to schedule a visit and find out which treatment option is the right fit for you.