What Causes The Black Triangle Between Teeth? 7 Reasons

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Do you know what causes the black triangle between teeth? Black dark triangles between your teeth, called open gingival embrasures, are one of the conditions that people often want to repair. About 66% of people over the age of 20 have. It is essential to understand how they develop and what to do about them because they can lead to new problems with your oral health.

The shape of the teeth plays a vital role in the presence of dark triangles. If the teeth are rectangular, their flat sides are side by side with little or no space between them. If the sides are more rounded, or if the teeth are triangular. However, the embrasure is more significant and likely to appear as a space (dark triangles) if the fabric gum is not ideal.

Triangle Between Teeth causes

What causes them?

If you notice gaps between your teeth, it is essential to chat with your dentist. Black dark triangles can appear between your teeth for many reasons, and some causes are closely related to the health of gums and teeth.

Gum recession

Gum with gum, pink, healthy, embraces the teeth, filling the spaces between them. Age, smoking, and periodontal disease (gum) can cause gums to retreat or move away from teeth. This can expose the roots and leave them vulnerable to bacteria, plates, and cavities.

Bone loss

The disease of gum, osteoporosis and other conditions can cause a loss of bone near the base of a tooth. When the bone is lost, the gum tissue in this area can also retreat. This leads to the formation of dark black triangles.

Dental hygiene

The gum tissue is more sensitive. If you brush your teeth too aggressively with a stiff brush, you can damage your gums over time. A study in 2011 revealed that other dental hygiene cleaners – tiny beguile binding brushes used to clean between teeth – can also lead to black triangles so large for space.

Orthodontic treatment

Small gaps can form between your teeth if you have had orthodontic care when they enter new positions. Sometimes, unfortunately, orthodontic bands or other parts of the device can damage the gums.

A source study in 2018 revealed that the probability of adults with straps developing dark black triangles between their lower and upper incisor teeth was 22% and 36%, respectively.

The shape of triangular teeth

Some people have rectangular teeth in shape, where the width of the tooth of the gum line is not very different from the width at the bite point. Some people have narrower teeth on the gum line so that the tooth has a more triangular form. Triangular teeth are more prone to develop these gaps. What causes the black triangle between teeth?

Thin and fragile tissue

The thickness of the gum tissue varies from person to person. A revised 2013 source revealed that the thin gum tissue is much less resilient, so your gums may not restore to their earlier fullness if you have a dental implant, a crown, or periodontal surgery.

How can you get rid of gaps?

How can you get rid of gaps?

Several treatment options are available depending on the cause and severity of the gap. Here are many to examine and chat with your dentist or oral surgeon.

 Dental hygiene

Dental silk and brushing twice a day is the review of the American Dental Association (ADA). ADA emphasizes the need to spend dental silk carefully to avoid hurting your gums. Check out this article to facilitate the steps for perfect dental silk.

If black triangles between your teeth are minimal and your gums are healthy, changing your dental hygiene habits can allow your gums to return to normal.

Treatment of hyaluronic acid

In some cases, your dentist can regenerate the gum tissue with hyaluronic acid injections. Some lawyer sources prefer this process to surgical corrections because it is less painful and has a quick recovery. Because this treatment is relatively new, there is little research on the duration of the effects.

Composite resin

Some people choose to have their expert dentist fill the gaps with a composite resin bond. Depending on your individual needs, your dentist can recommend using a pink resin, a dental resin, or both to eliminate black triangles between your teeth.

This process does not require surgery and takes some time to finish – a month, in some cases, because the resin is applied in thin layers, it seems natural, and your gums can adapt to the smallest space. Your dentist can also add dental composite plants to complete the appearance of teeth.


If black triangles form between your teeth due to a procedure or process that moves the teeth, your expert may be able to close the gaps by moving the teeth with braces. Orthodontic treatment takes time, but aesthetic results can value time and cost.


Your dentist can use ceramic or porcelain veneer on the tooth’s surface to fill the gaps and create a smile. Most of the time, the application of veneers involves changing the surface of your natural tooth so that plating and tooth shape a powerful bond. The experts say that the veneers last between 17 months and 20 years.

Surgical way

In some advanced cases of gum recession, some periodontists recommend a tissue transplant. 

In this procedure, your periodontist deletes a small amount of tissue from the roof of the mouth—removed tissue grafts on the areas covered around your teeth. Patients may also need bone grafts to build the bone at the base of their tooth.

Depending on the quantity of gum tissue removed from your teeth, your periodontist may also be able to use a pin technique to loosen the gum and will redeem it with collagen bands.

This process is considered less invasive because it does not require significant incisions or sutures that can disrupt blood intake in the area.

In a small study of five participants, the pinhole surgical repair was a source of 96.7% percentage of the energy to repair black triangles between teeth.

gaps treatment


Now that you know what causes the black triangle between teeth. The black triangles called open gingival embraces can form between your teeth when your gums are moving away from your teeth. Age, rigorous dental hygiene methods, gum disease, bone loss, and the size and shape of your teeth and gums can all contribute to forming these triangles.

The appearance is not the only reason why people want to correct triangles. They can trap bacteria and food, which causes new dental problems. A range of treatments is available, starting with changing your brushing habits to the toothbrush and dental silk.

Depending on the case severity of the condition, your dentist, your oral surgeon, or periodontist may recommend hyaluronic acid injections, a composite resin bond, braces, surgical correction, or veneers. If you notice dark black triangles forming between your teeth, talk to your dentist to decide which intervention has the most meaning in your case.


Author Since:  September 18, 2018


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