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Is This a Case That Needs Periodontal Flap Surgery? Two Criteria a Dentist Explains

D-Day Dental Clinic · 통합치의학과 전문의 2명의 솔직한 치과 이야기 · December 26, 2025

Is this a case that needs periodontal flap surgery? Two criteria a dentist explains Periodontal flap surgery ​ ​ Hello. ​ I’m Kim Mu-jin, the CEO of D-Day Dental Clinic. ​ ​ ​ To b...

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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: D-Day Dental Clinic

Original post date: December 26, 2025

Translated at: April 20, 2026 at 1:42 PM

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

Is this a case that needs periodontal flap surgery?

Two criteria a dentist explains

Periodontal flap surgery

Hello.

I’m Kim Mu-jin, the CEO of D-Day Dental Clinic.

Is This a Case That Needs Periodontal Flap Surgery? Two Criteria a Dentist Explains image 1

To be honest, let me tell you something.

Do you know when a dentist feels the most frustrated?

It’s when a patient says,

“ I should have come sooner.”

Is This a Case That Needs Periodontal Flap Surgery? Two Criteria a Dentist Explains image 2 Is this a case that needs periodontal flap surgery? Two criteria a dentist explains D-Day Dental Clinic

For most people who have progressed to the point where periodontal flap surgery is needed,

there is a common pattern.

They see blood when brushing and think,

“That must just be normal,” and move on,

and even when their gums recede,

they think,

“That must be because I’m getting older.”

I hope this article helps you not miss the right time for treatment.

If I share the same criteria I actually use in the clinic,

you can get a rough idea of how serious your current condition is without going to the hospital.

Please take a moment and read carefully.

I’m sure it will be helpful.

​​1. Treatment timing based on periodontal pocket depth​​2. Judging by response to previous treatment​​3. What D-Day Dental Clinic always checks before treatment​​
  1. Treatment timing based on periodontal pocket depth

The clearest standard for determining whether periodontal flap surgery is needed is the depth of the periodontal pocket.

What is a periodontal pocket?

Simply put, it is the space between the gum and the tooth.

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A healthy gum usually has this gap at about 2–3 mm,

but when tartar builds up and inflammation develops, this space gradually gets deeper.

In my clinic, I measure this depth with a test called probing.

A thin instrument is inserted into the gum to measure the depth.

If it is 5 mm or more, scaling or root planing alone is often not enough.

That is because tartar and inflamed tissue at a depth of 5 mm or more are hidden in places you cannot see.

Even if you insert an instrument and try to scrape them out, they cannot be removed accurately.

That is when periodontal flap surgery is needed.

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The gums are opened so we can directly see the area

and thoroughly remove calculus and inflamed tissue.

Only then can the gums firmly reattach to the teeth.

  1. Judging by response to previous treatment

The second criterion is “response to previous treatment.”

If your gums swell again or bleed within 3 months after scaling,

or if there is no improvement even after root planing,

then surface-level treatment has already reached its limits.

Is This a Case That Needs Periodontal Flap Surgery? Two Criteria a Dentist Explains image 5 Is this a case that needs periodontal flap surgery? Two criteria a dentist explains D-Day Dental Clinic

There is a comparison I often use with patients.

If mold appears in a house, will wiping only the surface solve it?

You need to remove the wallpaper and treat the inside as well for it not to come back.

Gum treatment is the same.

Especially for people with chronic periodontitis, there is inflamed tissue deep inside the gums.

If that is not removed, it will keep coming back no matter how much treatment is done.

At times like this, periodontal flap surgery is needed to address the root cause.

Of course, after this treatment, there may be temporary looseness in the teeth or some discomfort.

But that is part of the healing process, and over time the gums reattach firmly and stabilize.

  1. What D-Day Dental Clinic always checks before treatment

When I recommend periodontal flap surgery to a patient, I always check three things.

First, I accurately confirm the degree of bone loss with an X-ray. Periodontal flap surgery Is This a Case That Needs Periodontal Flap Surgery? Two Criteria a Dentist Explains image 6 Is this a case that needs periodontal flap surgery? Two criteria a dentist explains D-Day Dental Clinic

As periodontitis progresses, the bone that supports the teeth starts to dissolve.

If more than one-third has been lost, that is the point where surgery is needed.

Second, I explain everything thoroughly to the patient. Periodontal flap surgery

This is the part I consider most important.

Why this treatment is necessary,

what happens if it is not done,

and what process follows after treatment

I explain all of this in detail.

The patient needs to understand before treatment can begin.

Third, I manage pain carefully. Periodontal flap surgery

I also had a fear of dental clinics when I was young, so I understand patients’ anxiety better than most.

That is why I allow enough time for anesthesia, and I keep checking during treatment whether anything feels uncomfortable.

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Let me summarize what I talked about today.

  1. If the periodontal pocket depth is 5 mm or more, or

  2. if symptoms keep recurring even after receiving regular gum treatment,

then it is time when periodontal flap surgery is needed.

This treatment may be the last chance to save your natural teeth.

Is This a Case That Needs Periodontal Flap Surgery? Two Criteria a Dentist Explains image 8 Is this a case that needs periodontal flap surgery? Two criteria a dentist explains D-Day Dental Clinic

Above all, the most important thing is not to miss the treatment timing. Periodontal flap surgery

If you think, “Should I just hold out a little longer?” more bone loss can progress,

and eventually you may reach a point where the tooth has to be extracted.

If your gums are bleeding now or you feel discomfort when chewing food,

please do not just ignore it and get an accurate examination.

If it is detected early and treated properly, you can keep your natural teeth for a long time.

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Is this a case that needs periodontal flap surgery? Two criteria a dentist explains

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