Understanding Black Triangle Teeth

3 min read

Imagine aligning your teeth for your dream smile, only to be left with small triangular gaps between your teeth!

Black triangle teeth, also known in the dental industry as open gingival embrasures, can be a source of concern for some patients who have straightened their teeth. These triangular spaces between teeth and gums can affect both the appearance and health of your teeth. This could lead to confidence issues or further dental problems, such as plaque buildup and tooth decay, temperature sensitivity causing discomfort, and even gum disease. In this blog post, we will explore the causes behind black triangle teeth and discuss various treatment options available to fix this issue.

Understanding the Causes 

Black triangles between teeth typically occur when there is a loss of gum tissue between the teeth, creating a visible gap and therefore a “black triangle” appears. Several factors can contribute to the development of black triangle teeth, including:

Gum Recession: Gum recession can result from periodontal (gum) disease, aggressive tooth brushing, or even aging. As the gum tissue recedes, it can expose the triangular space between the teeth, leading to the unsightly black triangle formation.

Bone Loss: In some cases, bone loss around the teeth can lead to the appearance of black triangles. This loss of bone support can occur due to similar reasons as gum recession, such as periodontal disease, but can also be cause by tooth extraction.

Tooth Shape and Position: The shape and alignment of your teeth can also influence the presence of black triangles. Even if the gum tissue is healthy, teeth that are too small or have unusual contours may leave gaps between them.

Teeth aligning: Straightening teeth is great for the health and look of your smile, but can sometimes contribute to black triangles forming. When overcrowded teeth are moved into their correct positions, they may create new “gaps” now that the teeth are properly aligned, therefore revealing small triangular gaps between the teeth. Luckily, there are simple solutions to this problem in order to restore both oral health and aesthetics.

Treatment Options

Gum Grafting: This involves taking tissue from a different part of the mouth, such as the palate, and grafting it onto the areas with gum recession. This procedure can help restore lost gum tissue and therefore fill in black triangles.

Porcelain Veneers or Crowns: For individuals with small or misshapen teeth, porcelain veneers or crowns can be used to reshape the teeth and close black triangles. These are custom-made restorations which can improve both the appearance and function of the teeth where black triangles are present.

Orthodontic Treatment: In some cases where tooth misalignment is contributing to black triangle formation, orthodontic treatment may be recommended. Traditional braces or clear aligners can gradually move the teeth into proper alignment, which will reduce the gaps between them.

Composite Bonding: Dental bonding involves applying a tooth-coloured composite resin to the teeth where there are gaps, to fill in black triangles and improve their appearance. This is a minimally invasive procedure that is a highly effective solution for small black triangles between teeth.

Composite Bonding with Toothfairy 

Toothfairy help patients who are dealing with black triangle teeth by offering composite bonding where needed. Although teeth straightening can be done effectively with Toothfairy’s clear aligners, there may still be black triangles present at the end of treatment. Therefore dental bonding can can transform the teeth and create patients’ perfect smile, offering the finishing touch after aligning and whitening the teeth.

Last updated on May 17, 2024

Dr. Deepak Aulak

Dr. Deepak Aulak is a London-based dental practitioner with a special interest in cosmetic dentistry. Having graduated from King's College London in Dentistry, Dr. Aulak was decorated with over a dozen awards and scholarships along the way, which notably include the Jelf Medal, Malleson Prize for research and GKT Hospital's Full Shields.


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