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How to Use an Interdental Brush: Keep the Spaces Between Your Teeth Clean!

Seoul Of Dental Hospital · 서울오브치과병원 · May 11, 2026

How to Use an Interdental Brush: Keep the Spaces Between Your Teeth Clean! Even if you brush your teeth every day, it can still feel like food gets stuck between your teeth or that...

AI translation notice

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: Seoul Of Dental Hospital

Original post date: May 11, 2026

Translated at: May 11, 2026 at 9:16 AM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

How to Use an Interdental Brush: Keep the Spaces Between Your Teeth Clean! image 1

Even if you brush your teeth every day,

it can still feel like food gets stuck between your teeth

or that your mouth does not feel refreshed.

The reason this happens even after brushing diligently

is that toothbrush bristles have difficulty reaching deep spaces between teeth,

so brushing may not be completely thorough.

In cases like this, if you use an "interdental brush,"

you can keep the spaces between your teeth

clean as well.

If you do not properly care for the spaces between your teeth,

it can lead not only to cavities

but also to gum inflammation,

so regular care is important.

How to use an interdental brush!

Let’s find out together with Seoul Ob Dental Hospital :)

How to Use an Interdental Brush: Keep the Spaces Between Your Teeth Clean! image 2

An interdental brush is a small brush-like tool

that is effective for removing

food debris and plaque

left between teeth.

In particular, if you use it while having implants, prosthetics, or orthodontic appliances,

you can manage your oral care

even more effectively.

Meanwhile, if your gums bleed while using an interdental brush,

many people worry, “Is it okay to keep using it?”

However, unless the brush is forced in at a size that is too large

or used with excessive force,

in many cases the bleeding is due to existing gum inflammation.

So rather than avoiding it,

it is actually necessary to actively use an interdental brush

for clean oral care.

How to Use an Interdental Brush: Keep the Spaces Between Your Teeth Clean! image 3

The method is not difficult.

While looking in the mirror, slowly insert the interdental brush

between your teeth,

and gently move it back and forth

about 2 to 3 times.

At this time, rather than applying strong force

or pushing it in forcibly,

it is better to use it carefully

in line with the gum line. After use, thoroughly remove any debris

under running water,

shake off the moisture, and store it in a well-ventilated place to dry,

so it can be used multiple times.

If used about once or twice a day,

it can typically be used for up to about a week.

However, more important than the length of use

is the condition of the interdental brush.

If the bristles are pressed down or splayed,

if the bristles are worn out,

or if the metal wire is bent,

do not use it any longer

and replace it with a new one.

In other words, when deciding when to replace an interdental brush,

it is important not to judge only by the number of days used,

but also to check the shape of the bristles,

whether it has been deformed, and its cleanliness.

How to Use an Interdental Brush: Keep the Spaces Between Your Teeth Clean! image 4

In addition, when using an interdental brush,

choosing the right size is also an important part.

If the size is too large and you force it in,

it can injure the gums,

and conversely, if the size is too small,

you may not feel that it cleans thoroughly.

The right size is one that slides gently between the teeth

while feeling a slight amount of resistance.

If you are using one for the first time,

it is also recommended to check the proper size

with a dental clinic.

However, if the spaces between your teeth are too narrow

and the interdental brush does not go in well,

it is more appropriate to use dental floss

rather than forcing it in.

How to Use an Interdental Brush: Keep the Spaces Between Your Teeth Clean! image 5

So, we have introduced how to use an interdental brush.

It is good to use an interdental brush once a day,

especially after brushing before bed.

During sleep,

the secretion of saliva decreases, making it easier for bacteria to multiply,

so cleaning the spaces between your teeth thoroughly before bed

can be helpful. Dental health is not maintained overnight;

it is protected as small habits build up over time.

If you consistently use an interdental brush together with brushing,

you will be able to care for the spaces between your teeth

more refreshingly and thoroughly!

Starting today, please invest just one minute before going to sleep

and build a cleaner, healthier oral care habit :)

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