From what depth (mm) is a periodontal pocket considered risky?

Healthy gums are typically 3mm or less. At 4mm and above, a toothbrush can’t reach and biofilm settles in; once it goes beyond 5~6mm, more active treatment such as root planing is needed. More important than the absolute number is whether the same site is getting deeper over time. So it’s best to record the measurements each visit and compare.

Can the lost bone around my teeth (alveolar bone) grow back?

To be frank, in most cases it does not return to its original state. For certain defect shapes, regenerative procedures (Bone Graft (GBR) and barrier membranes) can be used, but they don’t apply to every case and we cannot promise full height recovery. So the goal of periodontal treatment is not ‘regrowth’ but preventing further loss of the remaining bone.

How are Scaling (Dental Cleaning) and root planing different?

Scaling mainly removes tartar above the gums and in shallow areas. When periodontal pockets deepen, we need to go down to the root surface inside to remove biofilm and infected tissue — that’s root planing. It’s done under local anesthesia, divided into sections, and takes more time and recovery than scaling. This is covered by Korean NHIS.

5 periodontitis regrets and a complete side-effects guide — deep periodontal pockets can’t be reversed

Q: Can periodontitis be cured?

It’s best understood as a condition you manage, like high blood pressure. Treatment can remove inflammation and stop progression, but the bacterial biofilm that causes it forms again every day. With 3~6 month maintenance visits and habits like interdental brushes and floss, you can stay stable for a long time. If maintenance lapses, it will recur.

30-second key summary

The key regrets in periodontitis are ① Delaying because it didn’t hurt, ② Coming only after deep pockets led to alveolar bone loss, ③ Stopping post-treatment maintenance and relapsingPeriodontitis brings pain late, so “I’m not in pain, so I’m fine” is the riskiest judgment. Check your periodontal pocket depth (3mm or less = normal; 4mm or more = caution) by the numbers, and after Scaling (Dental Cleaning) and root planing 3~6 months of maintenance care— keeping that schedule can halt progression. Bone already lost usually doesn’t come back, so the goal is to protect the remaining bone.

01The 5 real reasons for periodontitis regrets

Periodontitis is when gum inflammation has progressed down into the supporting bone (alveolar bone). Treatment can stop it from getting worse. Then why do regrets happen? Regret is created not in the treatment room but in those few years of telling yourself, "It’s not hurting yet"that regret takes shape.

Regret 1"I put it off because it didn’t hurt" — progression without pain

Why this happensEven when it’s quite advanced, periodontitis causes little to no pain. Many dismiss a little bleeding as “my toothbrush bristles are hard,” and by the time you come in because a tooth has started to feel loose, a lot of the supporting bone has already been lost. This regret is the heaviest because there’s no way to reverse it.

PreventionNot by symptoms, but by numbers. At your exam, ask "What is my periodontal pocket depth in mm?" 3mm or less is manageable; 4mm or more is the range that needs intervention. Bleeding from the gums is already a sign of inflammation, not your toothbrush’s fault.

Regret 2"They said the bone has been lost—won’t it grow back?" — alveolar bone loss

Why this happensThe alveolar bone is the bone that holds your teeth. Once it’s lost due to inflammation, it generally does not regrow on its own. There are regenerative procedures, but they don’t apply to every case and don’t fully restore the original height. If you expected “treatment will return it to normal” and then hear otherwise, it can be very disappointing.

PreventionSet your treatment goal as "protecting the remaining bone," not "full restoration". Before treatment, check your current bone height on X-rays, and compare at the same angle 6 months and 1 year later to see visually whether progression has stopped.

Regret 3"After treatment, my teeth feel sensitive and have gaps" — changes after deep cleaning (root planing)

Why this happensWhen deep periodontal pockets are cleaned, the swollen gums shrink. Then the root surfaces can be exposed and feel sensitive, and spaces between teeth may appear. If you mistake this for a side effect, you may conclude “I got worse after treatment.”

PreventionBefore treatment, "After treatment, can my gums recede so I feel sensitivity or see spaces between teeth?" ask this. These changes result from the inflammation resolving, and you usually adapt over a few weeks. Desensitizing toothpaste and fluoride application help. Clean any spaces with an interdental brush.

Regret 4"I thought I was finished with treatment" — relapse after stopping maintenance

Why this happensPeriodontitis is not a one-and-done cure, but a disease to be managed. If you stop coming after scaling and root planing improve things, bacterial biofilm builds up again and in a few months to 1 year you’re back where you started. With each repeated round of treatment, more bone is gradually lost.

PreventionAt the end of treatment, "When is my next maintenance visit—after how many months?" confirm this and keep to that interval. It’s usually every 3–6 months. Interdental brushes and floss are the only way to clean the pocket entrances your toothbrush can’t reach.

Regret 5"I didn’t take the smoking and diabetes talk seriously" — Leaving risk factors unaddressed

Why it happensSmoking reduces blood flow to the gums and weakens treatment response, and uncontrolled diabetes fuels inflammation. If you keep treating while leaving those two unaddressed, outcomes won’t be good. Years later it often turns into the regret, "I wish I had quit back then."

PreventionQuitting smoking is the single most effective step in periodontal care. If you have diabetes, work with your physician to control your blood sugar while you undergo treatment. When we bring this up at the dentist, it isn’t nagging—it’s because it directly determines your results.

02Side effects in Periodontitis care — frequency and what to do

Side effects in Periodontitis care fall into "rare but important to know" and "common but mild." Understanding both the frequency and what to do will ease vague worries.

Side effects	Frequency/Presentation	What to do
Post-treatment sensitivity	Common — Gum recession exposes the root	Desensitizing toothpaste and fluoride application. Usually improves within a few weeks
Spaces appear between teeth	Common — A result of swollen gums settling down	Use an interdental brush. If severe, consider esthetic restorations
Gum pain during/after treatment	Common — When treating deep periodontal pockets	Take prescribed medication and rinse with lukewarm water. Improves within a few days
Temporary increase in tooth mobility	Occasional — Right after inflammation is cleared	Usually stabilizes. If it persists, consider splinting or occlusal adjustment
Recurrence of Periodontitis	Common when maintenance is stopped	Adhering to 3~6 month maintenance care is the only preventive measure
Tooth loss	When the condition is very advanced	If the alveolar bone has resorbed significantly, consider extraction followed by Dental Implant or Denture

Frequencies and patterns are general tendencies and can vary with your oral condition and overall health. For an accurate risk assessment, please consult our clinicians.

03Please reconsider if any of the following apply to you

Candidly, Periodontitis treatment isn’t the right answer for everyone. If any of the following apply, discuss alternatives with our clinicians before rushing into treatment.

No intention to quit smoking — Smoking greatly reduces response to periodontal treatment. Even repeated treatment often won’t deliver good results.
Uncontrolled diabetes — When blood sugar stays high, inflammation is hard to control. Work with your physician to manage it while receiving treatment.
Unable to come for 3~6 month maintenance visits — Periodontitis isn’t cured; it’s managed. Without maintenance, relapse is essentially expected.
Expecting a "one-and-done" fix — Deep periodontal pockets are treated over multiple visits while we monitor your response. This is not a one-visit treatment.
Expecting bone lost to disease to return fully to its original state with treatment — We should align expectations first. The goal isn’t to restore what’s lost, but to protect the bone you have left.

04Pre-treatment checklist — If you confirm just these, your chance of regret drops significantly

It doesn’t matter which dental clinic you choose. If the clinic can clearly answer the points below, you can receive care there with confidence.

Periodontal pocket depth in mm Confirmed (3mm or less / 4mm or more)
With an X-ray current alveolar bone heightwe looked at it together and it was explained to me
After treatment sensitivity or spaces between teethI was informed these may occur
"Will the lost bone grow back?" an honest answerwas given
Maintenance interval (3~6 months)was explained specifically
Smoking, diabetes, and other my risk factorswere explained to me
I was actually taught how to use an interdental brush and floss

05Frequently Asked Questions

Q.From how many mm is a periodontal pocket considered risky?

Healthy gums are generally 3mm or less. At 4mm or more, a toothbrush can’t reach and plaque (biofilm) settles in; once it exceeds 5~6mm, more active care such as root planing is needed. More important than the absolute number is whether the measurement at the same site is getting deeper over time. So it’s best to record the numbers each visit and compare them.

Q.Does lost jawbone grow back?

To be honest, in most cases it does not return to its original state. For certain types of bony defects, regenerative procedures (bone graft and membrane) can be used, but they don’t apply to every case and we can’t promise full height recovery. That’s why the goal of periodontal treatment isn’t “restoration,” but preventing further loss of the remaining bone.

Q.Is tooth sensitivity after periodontitis treatment a failure?

No. It’s actually a sign that the inflammation has subsided. As swollen gums settle down, the root surface becomes exposed and more sensitive to cold. Most people adapt over a few weeks, and desensitizing toothpaste plus fluoride application can help. However, if the sensitivity worsens over time or one particular tooth hurts a lot, we should check for other causes.

Q.Can periodontitis be cured?

Like hypertension a condition you manageis the most accurate way to understand it. Treatment can remove inflammation and halt progression, but the bacterial biofilm that causes it forms again every day. With 3~6 month maintenance and consistent interdental brush and floss habits, it can remain stable for a long time. If maintenance stops, it will recur.

Q.How is Scaling (Dental Cleaning) different from root planing?

Scaling (Dental Cleaning) mainly removes tartar above the gums and in shallow areas. When pockets deepen, we must go down to the root surface inside to remove the biofilm and infected tissue; that is root planing. It is done with local anesthesia, divided by area, and needs more time and recovery than scaling. This is covered by Korean NHIS.

Q.If my tooth is already loose, can it be saved?

It depends on whether the looseness is from inflammation and on how much bone loss there is. Looseness caused by inflammation can stabilize after treatment; if most of the supporting bone is gone, extraction may be unavoidable. However, before extraction "Is there truly no way to save this tooth?"Be sure to ask, and choose a clinic that doesn't rush you.

A consultation that shows periodontal pocket depths as exact measurements

At Seoul BD Dental, we don't end with "Your gums don't look good." We show periodontal pocket depths by area as exact numbers and review alveolar bone height together on X-rays, then first explain how we'll protect the remaining bone. No same-day payment pressure.

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Also check the regrets and side effects of other treatments

On this topic: a column written by our director

We’ve compiled the questions we’re asked most often in the clinic.

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