Periodontitis: Symptoms, Treatment, and How It Differs From Periodontal Disease

Sharp pain when biting down, a sensation that the tooth has "grown taller," gum swelling, or even the appearance of pus — these symptoms may indicate periodontitis. This inflammatory condition is classified as a serious one. It occurs when infection spreads beyond the root canals and affects the tissue surrounding the tooth root.

Many patients mistakenly believe that if a tooth stops hurting after pulpitis, the problem has gone away. In reality, it's precisely after the nerve dies that the infection often progresses into chronic periodontitis. Without treatment, this can lead to cyst formation, an abscess, bone tissue destruction, and even tooth loss.

The good news is that modern dentistry allows most cases of periodontitis to be successfully treated while preserving the natural tooth.

At Digital Dental Clinic, treatment is carried out using modern digital diagnostics, computed tomography, an operating microscope, and modern endodontic techniques. We analyze each clinical case in detail and follow international treatment protocols to achieve the most predictable outcome possible.

In this article, you'll learn:

• what periodontitis is;
• why it occurs;
• which symptoms should raise concern;
• how treatment is carried out;
• whether the tooth can be saved;
• how periodontitis differs from periodontal disease.

What Is Periodontitis?

Periodontitis, by classification, is inflammation of the tissues surrounding the tooth root. These include the periodontal ligament, bone tissue, and other structures that hold the tooth in the jaw.

Most often, apical periodontitis occurs when infection from the root canals spreads beyond the root apex into the surrounding tissue.

Unlike pulpitis, where the inflammation is located inside the tooth, periodontitis affects tissue outside the root.

That's exactly why treatment requires not only cleaning the root canals but also eliminating the infection around the root apex.

Why Does Periodontitis Occur?

In most cases, periodontitis results from untreated pulpitis.

After the pulp dies, bacteria continue to actively multiply inside the root canals. They pass through the root apex into the bone tissue and trigger an inflammatory process.

According to medical classification, the main causes of periodontitis include:

• untreated pulpitis progressing into a chronic process;
• poor-quality root canal treatment;
• traumatic procedures in the oral cavity;
• reinfection of the canals;
• deep decay;
• various traumatic factors;
• a cracked or fractured tooth;
• traumatic impact on the tooth's ligaments;
• a leaking old filling or crown.

In all of these cases, bacteria remain the source of infection and must be completely eliminated.

What Are the Symptoms of Periodontitis?

Symptoms can vary significantly depending on the stage of the disease.

If suppurative (purulent) periodontitis is diagnosed, the patient experiences throbbing pain. At a more advanced stage, the pain is usually a persistent ache. Sometimes granulating periodontitis develops, characterized by connective tissue overgrowth. If granulomatous periodontitis is identified, the doctor will see a clear zone of bone destruction on the image.

With acute periodontitis, the following most often occur:

• severe pain when biting down;
• a sensation that the tooth has become taller;
• persistent aching pain;
• gum swelling;
• cheek swelling;
• the appearance of pus;
• elevated body temperature.

If the condition progresses to a chronic form, symptoms may nearly disappear entirely.

That's exactly why many patients go for years without suspecting a chronic problem — until it's accidentally discovered on an X-ray or CT scan.

Why Does the Tooth Hurt When Biting Down?

This is one of the most characteristic symptoms of periodontitis.

The inflammation is located around the root apex. When a person bites into food, the tooth shifts slightly within the bone. The inflamed tissue around the root reacts with pain even to minimal pressure.

That's exactly why patients often say: "It feels like the tooth has become longer and is the first thing that touches when I chew."

This symptom is a strong reason to see a dentist as soon as possible.

How Does Acute Periodontitis Differ From Chronic Periodontitis?

According to classification, there are two main forms of the condition.

Acute PeriodontitisChronic PeriodontitisAcute, severe painOften an asymptomatic chronic courseAcute pain when biting downChronic discomfort may be minimalAcute swelling of the gums or cheekThe chronic process is mostly detected on an X-rayAn acute abscess may formCan lead to the formation of a granulomatous focus or a cyst

Chronic periodontitis in particular is one of the most common causes of an accidentally discovered dental cyst.

It's important to distinguish between the forms: an acute process requires urgent drainage if it's a purulent condition. A chronic condition often has periods of flare-up. For example, granulating periodontitis tends to flare up frequently.

How Does Periodontitis Differ From Periodontal Disease (Gum Disease)?

Patients very often confuse these two conditions.

In reality, they have different causes and require different treatment.

PeriodontitisPeriodontal DiseaseInfection spreads from the root canal (apical course)Inflammation begins in the gums, eventually producing purulent exudateAffects tissue near the root apexAffects tissue around the tooth neckMost often occurs after pulpitisMost often occurs due to plaque and tartarTreated with endodontic treatmentTreated by a periodontist

Despite the similar-sounding names, these are completely different conditions.

How Is Periodontitis Diagnosed?

A visual examination alone isn't enough to establish an accurate diagnosis.

At Digital Dental Clinic, the doctor conducts a comprehensive examination, which includes:

• a clinical examination;
• checking for pain when biting down;
• assessing the condition of the gums and ligament (in cases of a fibrous course);
• a digital X-ray;
• computed tomography (CT), when necessary (in purulent cases).

A CT scan allows the doctor to assess:

• the extent of the inflammation;
• the condition of the bone tissue;
• the quality of previous canal treatment;
• the presence of additional canals;
• the possibility of saving the tooth.

At Digital Dental Clinic, modern digital technologies and AI-powered tools are used to analyze diagnostic data. This helps the doctor more accurately assess the clinical situation, plan treatment, and choose the most effective approach for each patient.

How Is Periodontitis Treated?

The main goal of treatment is to eliminate the infection. This applies both to cases involving granulating periodontitis and to actively developing granulomatous processes. If treatment isn't provided, chronic periodontitis will lead to a flare-up. If a sudden flare-up occurs, the patient experiences unbearable pain.

The fibrous type is also treated to prevent it from progressing into granulating or granulomatous periodontitis. If this stage isn't stopped in time, it quickly becomes purulent. Even when fibrous periodontitis is observed, it's necessary to monitor the condition to prevent a flare-up.

With inflammation, it's important to ensure drainage of the exudate. We use a microscope to overcome the purulent process in the canals and treat granulomatous periodontitis.

In most cases, modern dentistry allows the natural tooth to be preserved even in cases of significant inflammation.

Why Does Treatment Begin With the Root Canals?

Many patients are surprised that when inflammation occurs near the root, the doctor treats the canals specifically.

The answer is simple: the source of the infection is inside the tooth.

As long as bacteria remain in the root canals, the body won't be able to fully eliminate the inflammation around the root apex.

That's exactly why treatment of periodontitis begins with:

• cleaning the root canals;
• disinfection;
• hermetic filling.

Once the source of infection is eliminated, the body gradually restores the bone tissue.

How Is Periodontitis Treatment Carried Out?

Treatment consists of several stages.

1. Comprehensive diagnostics

Before treatment begins, the doctor performs:

• a clinical examination;
• a digital X-ray;
• computed tomography (if indicated);
• an assessment of the condition of any previous canal treatment.

This allows the cause of the inflammation to be determined and an individualized treatment plan to be developed.

2. Tooth isolation

A rubber dam is used during treatment. It ensures sterility of the working field and prevents bacteria from the oral cavity from entering the root canals.

3. Cleaning the root canals

The doctor removes remnants of infected tissue, old filling material (in cases of retreatment), and mechanically cleans all root canals. Modern nickel-titanium instruments are used for this, allowing even complex tooth anatomy to be treated with maximum precision.

4. Disinfection

After mechanical treatment, the canals are thoroughly rinsed with antiseptic solutions. At Digital Dental Clinic, we use ultrasonic activation of antiseptics. This allows the solution to penetrate hard-to-reach areas of the canal system and more effectively eliminate bacteria.

In some cases, the doctor may leave a medicinal preparation in the canals for several weeks if the inflammatory process is pronounced.

5. Hermetic canal filling

After complete disinfection, the canals are hermetically filled with biocompatible materials. Quality filling prevents bacteria from re-entering the canal system.

6. Tooth restoration

After successful treatment, it's important to properly restore the tooth. If significant tissue has been lost, the doctor may recommend placing a ceramic crown. It protects the tooth from fracture and helps evenly distribute chewing load.

Why Is Treatment Under a Microscope So Important?

Root canals have a complex anatomy. Many teeth have:

• very narrow canals;
• additional branches;
• curvatures;
• calcified areas.

Without sufficient magnification, the dentist may not see all the features of the tooth's structure.

That's exactly why at Digital Dental Clinic, complex cases of periodontitis are treated under an operating microscope.

The microscope allows the doctor to:

• find additional root canals;
• see root cracks;
• more thoroughly clean infected tissue;
• preserve healthy tooth tissue;
• improve the prognosis for successful treatment.

Retreatment of Root Canals in Periodontitis

One of the most common causes of periodontitis is poor-quality root canal treatment.

Retreatment may be needed if:

• one of the canals was missed;
• the canals were filled short of the apex;
• the filling material has lost its seal;
• reinfection has occurred;
• secondary decay has developed under a crown or filling.

In such cases, the dentist removes the old material, recleans the canals, and hermetically fills them again.

When Is Surgical Treatment Needed?

Retreating the canals doesn't always fully eliminate the infection.

If the inflammation persists, the doctor may recommend:

• root apex resection (apicoectomy);
• cystectomy (if a cyst has formed).

During resection, the root apex is removed along with the focus of inflammation, while the tooth itself is preserved.

Modern microsurgical techniques allow even complex clinical cases to be successfully treated.

When Can a Tooth No Longer Be Saved?

Despite the capabilities of modern dentistry, extraction is sometimes the only correct decision.

The main indications include:

• a vertical root fracture;
• critical tooth destruction;
• very significant bone tissue loss;
• inability to perform quality root canal treatment;
• excessive tooth mobility.

Before making such a decision, the doctor always evaluates every possibility for saving the tooth.

How Can You Tell If Treatment Was Successful?

Bone tissue doesn't heal immediately after treatment. The healing process is gradual and can take anywhere from several months to a year.

That's exactly why, after treatment, the doctor orders follow-up X-rays or a CT scan.

Signs of successful treatment include:

• absence of pain;
• comfortable biting;
• absence of swelling;
• gradual bone tissue restoration visible on follow-up images.

Regular monitoring confirms that the healing process is proceeding correctly.

What Happens If Periodontitis Is Left Untreated?

Without treatment, the infection continues to spread. This can lead to:

• cyst formation;
• an abscess;
• facial swelling;
• destruction of bone tissue;
• tooth loss;
• spread of the inflammation to neighboring teeth.

That's exactly why, when symptoms of periodontitis appear, you shouldn't delay a visit to the dentist.

How Does Periodontitis Differ From Pulpitis?

Pulpitis is inflammation of the nerve inside the tooth. Periodontitis is an infection that has spread beyond the tooth into the bone. With periodontitis, pain is often more severe when biting down, whereas with pulpitis, pain is triggered by temperature stimuli.

Can Periodontitis Be Treated Without Extracting the Tooth?

Yes, in most cases. Modern endodontics under a microscope allows even complex granulomatous or granulating periodontitis to be treated while preserving the tooth.

Why Can Chronic Periodontitis Go Unnoticed for a Long Time and Then Suddenly Flare Up?

The chronic period is characterized by the infection being "dormant." Under the influence of stress or a weakened immune system, a flare-up occurs. A chronic focus (for example, a granulomatous or purulent one) causes acute pain.

How Many Visits Are Needed to Treat Periodontitis?

Usually 2 to 3 visits. The first is for cleaning the canals and creating drainage if there's purulent exudate; the second is for disinfection; the third is for the final filling.

What Does an X-ray Show With Granulomatous Periodontitis?

An X-ray shows a round, dark spot near the tooth root. This is the granulomatous focus, where the bone tissue has been destroyed by the infection.

Why Do Patients Choose Digital Dental Clinic?

At Digital Dental Clinic, we take a comprehensive approach to treating periodontitis. Our goal is not just to eliminate symptoms, but to remove the cause of the inflammation and preserve the patient's natural tooth as much as possible.

Our advantages:

• modern digital diagnostics and computed tomography;
• CT analysis using modern digital technologies and AI-powered tools;
• root canal treatment under an operating microscope;
• use of a rubber dam and international endodontic treatment protocols;
• modern nickel-titanium instruments and ultrasonic activation of antiseptics;
• quality control at every stage of treatment;
• an interdisciplinary approach involving general dentists, surgeons, and prosthodontists;
• an individualized treatment plan for each patient.

We do everything possible to ensure that even complex cases of periodontitis end with the natural tooth preserved and oral health restored.

Conclusion

Periodontitis is a serious inflammatory condition that requires timely treatment. Without eliminating the source of infection, the inflammatory process won't disappear on its own and can lead to tooth loss or other complications.

Modern treatment methods, an operating microscope, digital diagnostics, and precise planning allow most cases of periodontitis to be successfully treated, preserving natural teeth even in complex clinical situations.

If you're experiencing pain when biting down, have noticed gum swelling, or have already been diagnosed with periodontitis, don't delay your visit to the dentist. The sooner treatment begins, the higher the chances of saving the tooth and avoiding more complex procedures.

‍