Every day I see patients who are surprised when I explain that the “normal” bleeding when brushing their teeth is actually the first sign of a problem that affects nearly half of adult Americans. Periodontitis is one of those silent diseases that advances without pain until the damage is already irreversible. Your gums may be deteriorating while you eat, talk, or sleep, and most of the time you don’t notice until your teeth start to loosen. What is worrying is not just tooth loss, but the fact that we are finding more and more connections between this infection and general health problems such as diabetes or cardiovascular disease. The good news is that it can be prevented and controlled if you know how to act.
What is periodontitis
Periodontitis is a persistent infection that attacks the gums and the tissue that supports your teeth. What starts as simple inflammation can become a serious problem that damages the bone and connective tissue, putting the stability of your teeth at risk.
I see cases every day in my practice, and you would be surprised to know that more than one billion people worldwide live with this disease. We are talking about a global prevalence of 12.5%, which positions it as the sixth most common disease worldwide. In the United States, as in other developed countries, nearly half of adults over 30 years old have some form of periodontal disease. These numbers are not meant to scare you, but to help you understand that it is a real and widespread problem.
The most concerning thing is that periodontitis advances silently.
When I look inside the mouth of a patient with periodontitis, I am seeing the result of a complex process where bacteria organize themselves into communities called biofilms. These bacterial colonies are not simply accumulated dirt: they form sophisticated structures that adhere to your teeth and gums, resisting even the best home brushing efforts. The three most aggressive bacteria — Porphyromonas gingivalis, Tannerella forsythia, and Treponema denticola — make up what we call the “red complex,” detected in more than 85% of advanced cases.
Here is something many patients don’t know: most of the damage is not caused directly by the bacteria. Your own immune system, in trying to defend you from the infection, triggers an inflammatory response that ends up destroying healthy tissue. It’s as if your body were trying to put out a fire with gasoline.
Defense cells release substances that degrade collagen and activate specialized cells that reabsorb bone. The result: your gums recede, deep pockets form where more bacterial plaque accumulates, and the bone that anchors your teeth begins to disappear.
What years ago we considered only a dental problem, we now know has repercussions throughout your entire body. Periodontitis is directly linked to diabetes, cardiovascular disease, and pregnancy complications. It is no coincidence that it is now called the “sixth complication of diabetes.”
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Stages and symptoms of periodontitis
Periodontal disease does not appear all at once. It has well-defined phases that allow you to act before it is too late.
Gingivitis: It is the initial reversible stage, characterized by red, swollen gums that bleed when brushing
Gingivitis is that first warning sign that 90% of us experience at some point in our lives. Your gums become red, shiny, and swollen. When you brush, blood appears in the sink.
The good news about this phase is that you still have time to reverse it completely. The gingival sulcus maintains normal depths of 3 millimeters or less, and there is no attachment loss from the tooth to the bone. Inflammation begins to develop between 2 and 4 days after bacterial plaque accumulates, and if you don’t act, within 2 or 3 weeks a lesion will have established itself where 60-70% of local collagen is destroyed. But I insist: with a good professional cleaning and improving your home hygiene, you can recover healthy gums.
Bleeding is not normal, even though many patients normalize it thinking they brush too hard.
Periodontitis: Gums recede, forming “pockets” that accumulate tartar and bacteria below the gum line
When you cross the line into periodontitis, the damage can no longer be reversed. Your gums begin to separate from the teeth, creating those deep spaces we call periodontal pockets. Inside, tartar and bacteria accumulate under anaerobic conditions, meaning without oxygen, which favors the growth of the most aggressive pathogens.
We currently classify periodontitis into four stages according to severity. In the initial stage (I) we see attachment loss of 1-2 millimeters and pockets of up to 4 millimeters. The moderate stage (II) presents losses of 3-4 millimeters with pockets of up to 5 millimeters. From the severe stage (III) and advanced stage (IV) onward, losses exceed 5 millimeters and pockets can reach 6 millimeters or more. Any pocket greater than 3 millimeters can no longer be effectively cleaned at home with your toothbrush, no matter how good your technique is.
We also assess the rate of progression using grades A, B, and C. Grade C indicates rapid progression, with bone loss greater than 1% per year relative to your age.
Advanced: Bone and connective tissue are lost, causing teeth to loosen or fall out
In the advanced stage, the alveolar bone and connective tissue have deteriorated so much that your teeth begin to move. We classify this tooth mobility in grades from 0 to III. When it reaches grade III, the tooth moves both horizontally and vertically, and the prognosis is usually unfavorable. Pockets can exceed 8 millimeters in depth, requiring surgical intervention to try to save the teeth. If left untreated, tooth loss is inevitable.
Main causes of periodontitis
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The main cause is the accumulation of bacterial plaque that hardens into tartar
Bacterial plaque is the primary factor that triggers the entire cascade of periodontal destruction. That sticky film that forms on your teeth is not simply dirt, but a bacterial community organized into complex structures called biofilms.
What makes these biofilms dangerous is their resistance. Bacteria organized this way can be between 10 and 1,000 times more resistant to antimicrobials than isolated bacteria. That is why rinsing your mouth is not enough — you need the mechanical action of brushing to disrupt these communities.
When you don’t remove plaque regularly, within 48 to 72 hours it mineralizes and becomes tartar or dental calculus. This hard material creates rough surfaces where bacteria adhere more easily, perpetuating the infectious cycle. Tartar not only retains more plaque, but also represents an additional pathological pathway in itself.
Once formed, tartar cannot be removed by home brushing.
Smoking (the most significant risk factor)
Smoking is the most important modifiable risk factor for developing periodontitis. Current smokers are nearly four times more likely to suffer from periodontal disease than non-smokers. Furthermore, the risk increases with quantity: if you smoke fewer than 10 cigarettes a day, your risk is multiplied by 2.8, but if you exceed 31 cigarettes daily, the risk jumps to 5.9 times. In the United States, it has been estimated that 41.9% of all periodontitis cases are directly attributable to tobacco, representing more than 6 million cases. The good news is that if you quit smoking for more than 11 years, your risk returns to levels similar to those of someone who has never smoked.
The mechanism is multifaceted. Nicotine causes vasoconstriction, which reduces bleeding and masks the signs of inflammation, allowing the disease to progress without you noticing.
Uncontrolled diabetes
Poorly controlled diabetes triples your risk of developing periodontitis. But the relationship works in both directions: if you have severe periodontitis, your risk of developing type 2 diabetes increases by 53%. For this reason, periodontitis is currently considered the sixth complication of diabetes. The advanced glycation end-products that form when blood sugar is elevated impair the repair capacity of your tissues, while periodontal inflammation generates a systemic response that increases insulin resistance.
Hormonal changes (pregnancy or menopause)
Hormonal changes during pregnancy increase the sensitivity of the gums to periodontal pathogens. Between 60% and 75% of pregnant women develop gingivitis during gestation. Menopause also increases vulnerability due to the decrease in estrogens that affects bone and gingival tissue.
Genetics and certain medications
Your genetics accounts for between 30% and 50% of your susceptibility to periodontal disease. Certain genetic polymorphisms, such as those of the IL-1 gene, can increase the risk of severe periodontitis by up to 6.8 times. Certain medications also play a role: phenytoin, cyclosporine, and some calcium channel blockers cause gingival overgrowth in 15-70% of people who take them, creating favorable conditions for bacterial accumulation.
Treatment of periodontitis
Treatment varies according to severity and may include different approaches ranging from non-invasive procedures to complex surgical interventions. The good news is that we have therapeutic options backed by solid scientific evidence that can halt the progression of the disease and, in many cases, recover some of the lost tissue.
Deep cleaning (Scaling and root planing): Removal of tartar below the gum line
Scaling and root planing is the standard initial treatment for periodontitis and forms the cornerstone of any treatment plan. This procedure mechanically removes bacterial biofilm and tartar that has accumulated below the gum line, in areas where your toothbrush cannot reach. We use specific instruments called curettes that access those deep pockets and thoroughly clean the root surface.
The results are measurable and predictable.
When we perform this treatment on pockets 5 millimeters or more in depth, we achieve reductions of 1 to 2 millimeters. We can work by quadrants in several sessions or treat the full mouth within 24 hours; both approaches have equivalent efficacy. After 4 weeks, we evaluate the response of your tissues to determine whether you need additional interventions.
Antibiotics: To control bacterial infection
Antibiotics have a specific and limited role in periodontal treatment. Doxycycline at a sub-antimicrobial dose of 20 milligrams twice daily for 3 to 9 months acts as a host response modulator, reducing tissue destruction without a direct antibacterial effect. Systemic antibiotics at full doses are not routinely recommended according to current European guidelines. We reserve them only for specific cases such as generalized periodontitis stage III in young adults, where the combination of amoxicillin and metronidazole can provide additional benefits. There are also locally delivered sustained-release antimicrobials, such as chlorhexidine chips or minocycline microspheres, which we apply directly into pockets as adjuncts to mechanical treatment.
In my experience, antibiotic overuse creates more problems than solutions. Bacterial resistance is real and increasingly concerning. That is why we evaluate each case individually before prescribing any antibiotic, always seeking the most conservative option that works.
Surgery: In advanced cases, to reduce pockets or perform bone and tissue grafts
When pockets greater than 4 millimeters with bleeding or pockets of 6 millimeters or more persist after initial treatment, we consider surgical options. Access or flap surgery allows us to directly visualize the bone and roots, removing all infected tissue. Guided tissue regeneration works especially well in intrabony defects of 3 millimeters or more and in Class II furcations, using barrier membranes and enamel matrix derivatives. Bone grafts can be autografts (from the patient themselves, with greater regenerative potential), allografts (from human donor), xenografts (bovine), or alloplastic (synthetic). Soft tissue grafts cover recessions and increase the amount of keratinized gingiva around the tooth.
Prevention of periodontitis
Your daily routine against periodontitis
Follow these recommendations to keep your gums healthy
In the morning
After meals
At night
Every 3-6 months
💡 Consistency is more important than perfection. Turn these actions into automatic habits.
Prevention requires a daily commitment that combines home care with professional follow-up. Something I repeat to my patients is that once you have had periodontitis, your mouth needs special attention forever. It is not something that is cured and forgotten, but a condition that is managed through consistent habits. The good news is that we know exactly what works and what doesn’t, so you can focus your efforts where they truly make a difference.
Brush your teeth three times a day
Brushing should be done three times a day with fluoride toothpaste. You can use a manual toothbrush with good technique or an electric toothbrush; both are equally valid if used correctly. What matters is not the force but the consistency and reaching all tooth surfaces. Spend at least two minutes on each brushing session, paying special attention to the gum line, where plaque accumulates. Do not brush immediately after eating acidic foods — wait at least 30 minutes to avoid damaging weakened enamel.
Use dental floss or interdental brushes daily
Interdental brushes are more effective than dental floss for preventing periodontal disease. The data are compelling: using interdental brushes reduces gingivitis by 34% and plaque indices by 32% compared to using only a toothbrush. That is why current European guidelines do not recommend dental floss as the first choice for periodontal maintenance.
Reserve dental floss only for spaces where interdental brushes cannot fit.
Choose the right size interdental brush for each space between your teeth. It should pass with slight resistance but without forcing. If you have doubts, ask us to show you the correct technique at the clinic. Rinses with chlorhexidine (for limited periods), essential oils, or cetylpyridinium chloride can complement your routine.
Schedule professional cleanings every 6 months
Professional cleanings every 6 months are the preventive standard for people with healthy gums.
If you have already had periodontitis, the protocol changes. Periodontal pathogens recolonize your pockets in approximately 9 to 11 weeks, which is why you need visits every 3 months initially. Over time and depending on your progress, we can space appointments between 3 and 12 months. This periodontal maintenance is not optional — it is the only way to keep a disease under control that, technically, never fully disappears.
Bibliography
- Nascimento GG, et al. “Burden of severe periodontitis and edentulism in 2021, with projections up to 2050: The Global Burden of Disease 2021 study.” Journal of Periodontal Research, 2024.
https://onlinelibrary.wiley.com/doi/10.1111/jre.13337 - Tonetti MS, et al. “Treatment of stage I-III periodontitis – The EFP S3-level clinical practice guideline.” European Federation of Periodontology, 2022.
https://www.efp.org/fileadmin/uploads/efp/Photos/Continuing_Education/Teatment-stage-Perio_Steps-ALL_071022-3.pdf - Tomar SL, Asma S. “Smoking-attributable periodontitis in the United States: findings from NHANES III.” National Health and Nutrition Examination Survey. Journal of Periodontology, 2000.
https://pubmed.ncbi.nlm.nih.gov/10872955/ - Preshaw PM, et al. “Periodontitis and diabetes: a two-way relationship.” Diabetologia, 2012.
https://pmc.ncbi.nlm.nih.gov/articles/PMC3228943/ - Tonetti MS, Greenwell H, Kornman KS. “Staging and grading of periodontitis: Framework and proposal of a new classification and case definition.” Journal of Periodontology, 2018.
https://www.perio.org/wp-content/uploads/2019/08/Staging-and-Grading-Periodontitis.pdf
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