Guide
Black triangles between teeth: causes and how we fix them.
Those small dark gaps near the gums between front teeth are common, especially in adults. Here is why they happen and what our orthodontists can do.
From Dr. Greenberg, Dr. Rana and Dr. Apigo at NA Orthodontics, North Arlington, NJ
What is a black triangle?
A black triangle is a small open space between two teeth, just above the gum line. Doctors call it an open gingival embrasure. It does not hurt, but it can trap food and make a smile look older.
Why they happen
- Triangle-shaped teeth that are wide at the edge and narrow at the gums
- Crowded teeth that overlapped and hid the space until they were straightened
- Gum or bone loss from gum disease or age
- Tooth contacts that touch too close to the biting edge
How our orthodontists reduce them
We plan every case on an iTero 3D scan. Depending on the cause, we may tip roots closer together, reshape contacts with IPR, or both. Lowering the contact point gives the gum a smaller space to fill. Learn more on our IPR page.
Real results with braces
A braces patient before and after IPR between the front teeth. Photos used with permission; individual results vary.
Next step
Book a consultation at North Arlington (201-991-4447) or Jersey City (201-940-1555). Consults are free under 18; adults are $90, credited toward treatment.
Frequently asked questions
- What causes black triangles between teeth?
- Common causes are triangular tooth shapes, crowded teeth that straighten and reveal a space near the gums, gum or bone loss, and tooth contacts that sit too high.
- Do black triangles go away on their own?
- Usually not. Treatment depends on the cause, so our orthodontists look at tooth shape, gum health and bite first.
- Can Invisalign or braces fix black triangles?
- Often, yes. Moving teeth and planned IPR, a gentle polish between teeth, can lower the contact point so the gum fills more of the space.
- Did my braces cause black triangles?
- Straightening does not create the space; it can reveal one that was hidden by overlapping teeth. It can often be reduced during treatment.
- When should I see a dentist or periodontist instead?
- If gum or bone loss is the main cause, we may work with your dentist or a gum specialist alongside orthodontic treatment.
Consultations are free for patients under 18. Adult consultations are $90, credited toward treatment.
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