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Blanche Dental Clinic · 블랑쉬치과의원 · July 17, 2026
Hello. I am Kim Tae-hyung, director of Blanche Dental Clinic. Have you ever felt self-conscious because the space between your front teeth looks dark when you smile? More peopl...
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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.
Clinic: Blanche Dental Clinic
Original post date: July 17, 2026
Translated at: August 17, 2026 at 6:45 PM
Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.
Hello.
I am Kim Tae-hyung, director of Blanche Dental Clinic.
Have you ever felt self-conscious because the space between your front teeth looks dark when you smile?
More people than you might expect visit the clinic because, even though their teeth are aligned, the spaces between them look black or food frequently gets stuck there.
This phenomenon is called a “black triangle.”
When searching online, most people look first for ways to fill the space and information about the cost.
At Blanche Dental Clinic, however, there is something we always check first.
“Why did the black triangle develop?”
Even when spaces look like the same type of black triangle, the treatment method may differ if the cause is different.
A black triangle is a space that looks like a black triangle because the gum tissue that should fill the area between the teeth—the interdental papilla—does not fill it sufficiently.
The issue is not simply that it looks unattractive.
Many people also experience the following discomforts.
Feeling self-conscious about its appearance when smiling.
Food getting stuck frequently.
Feeling that air escapes when speaking.
Discomfort when using dental floss.
Recurrent gum inflammation may occur.
Recently, more people have been considering black triangle treatment not only for aesthetic reasons but also for functional reasons.
Black triangles do not develop from just one cause.
This is the most common cause.
When the gums recede and the gum tissue that filled the spaces between the teeth decreases, a space naturally develops.
Periodontal disease or improper toothbrushing habits may contribute to this.
The more triangular the shape of the teeth, the higher the point at which the teeth touch one another is formed.
As a result, the space below may appear larger.
After orthodontic treatment, the teeth may be aligned while black, empty spaces develop between them.
Orthodontic treatment itself does not create black triangles; in many cases, spaces that were previously hidden simply become visible.
When the jawbone supporting the teeth decreases, the interdental papilla may also diminish.
In such cases, gum treatment may need to take priority over simply filling the space.
Black triangles may also develop as the gums naturally recede with age.
Many people think:
Black triangle = resin treatment
However, this is not the case in actual clinical treatment.
Resin is a good treatment option, but it is not suitable for every black triangle.
Depending on the size of the space, gum health, tooth shape, and bite, veneers, orthodontic treatment, or periodontal treatment may be more appropriate.
In other words, diagnosing the cause first is most important before deciding on resin treatment.
Resin treatment may be considered first in the following cases.
The space is relatively small.
You do not want to remove any natural tooth structure.
Your gums are healthy.
A quick aesthetic improvement is needed.
Resin is often selected as a conservative treatment because it can supplement the space without removing natural tooth structure.
The cost is what many people are most curious about.
Resin treatment for black triangles is a non-covered treatment for aesthetic improvement and is not covered by national health insurance.
The cost is not determined simply by the number of spaces between the teeth.
The treatment plan and cost are determined by considering the following factors together.
Size of the black triangle.
Degree of gum recession.
Number of teeth to be treated.
Resin material used.
Whether precision equipment such as a Rubber Dam or AquaCare is used.
Difficulty level, taking aesthetic shape and the bite into consideration.
In general, treatment plans are often established within a range of approximately KRW 400,000–500,000 per tooth, but the cost may vary depending on the treatment scope and difficulty.
What is important is not simply filling the space, but naturally forming the contact point between the teeth, designing the shape so that less food becomes trapped, and considering gum health as well.
Planning precisely from the beginning may help reduce the possibility of retreatment in the long term.
In reality, it is difficult to eliminate a space that has already developed through lifestyle habits alone.
However, there are methods that may help slow its progression.
Proper toothbrushing.
Flossing.
Regular scaling.
Early treatment of periodontal disease.
Regular checkups.
Does that sound too obvious? Haha. In particular, consistently caring for your gum health is the most important preventive measure.
Q. Can black triangles disappear naturally?
In most cases, they are difficult to restore naturally.
Treatment suited to the cause is often needed.
Q. Can resin be used for a long time?
The duration of its service may vary depending on oral care, the bite, and lifestyle habits.
Regular checkups can be helpful.
Q. Which is better, resin or veneers?
Rather than comparing which is superior, the appropriate treatment differs depending on the current condition of the teeth and the size of the space.
In black triangle treatment, what is more important than “how inexpensively the treatment can be performed” is “accurately diagnosing why the space developed.”
Even for the same black triangle, resin may be the most conservative treatment for some people, while veneers, orthodontic treatment, or periodontal treatment may be more appropriate for others.
At Blanche Dental Clinic, we do not simply fill the spaces between the teeth. We develop treatment plans that also take the shape of the teeth, gum health, and natural harmony when smiling into consideration.
We believe good treatment does not end with filling a space; it should help you maintain a healthy, natural smile for a long time.
I hope this was helpful. This has been Kim Tae-hyung, director of Blanche Dental Clinic. Please feel free to leave a comment if you have any questions~^^
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