Periodontitis is a silent disease. It does not hurt until it has progressed - and by then bone loss and tooth loss are already underway. WHO statistics show that some form of periodontal disease affects over 60% of adults after age 35, while severe forms hit around 10% of the population and represent the most common reason for tooth loss in adults - more than tooth decay. In this guide we explain what periodontitis actually is, the signals you must not ignore, what modern diagnosis and treatment look like, and what you can do yourself to stop the disease - or prevent it before it starts.

What periodontitis really is and why it's more dangerous than it looks

"Gum disease" has become an umbrella term for any gum problem. The precise medical term is periodontitis - a chronic inflammatory disease of the tissues that hold the tooth in place: the gums, periodontal ligament and alveolar bone (the jaw bone in which the tooth is anchored). When bacterial biofilm (dental plaque) sits along and below the gum line for years, the body responds with inflammation - and that inflammation gradually breaks down its own bone and ligament. The end result: the tooth no longer has support, becomes mobile and falls out.

What makes periodontitis particularly dangerous is the combination of three things: a painless course in the early stages, the false sense that "a little bleeding" is normal, and the fact that bone loss is essentially irreversible. The bone you lose to periodontitis in 80% of cases cannot be recovered with ordinary therapy - further loss can be stopped, but what is gone is gone. That is why early detection matters so much.

Gingivitis vs periodontitis - the distinction that changes everything

Many patients arrive saying "I have periodontitis" when in fact they have gingivitis. This is not a trivial difference - these are two completely different stages of disease, with completely different prognoses.

Gingivitis is inflammation of the gums only, without bone loss. Gums are red, swollen, bleed on brushing or flossing. It is a reversible condition - with proper hygiene and one or two professional cleanings, gums return to a fully healthy state with no consequences. Practically every adult has had gingivitis at some point and will have it again - it is a normal response to plaque build-up.

Periodontitis is the next step - gingivitis that has gone untreated and has reached deeper tissue. Now inflammation is breaking down the ligament and bone. It is an irreversible condition - we can stop it, but we cannot completely reverse it. The difference between the two is measured precisely at the exam: pocket depth and attachment level on X-ray. A patient cannot reliably determine the stage on their own.

Bleeding gums: the first and most ignored signal

The most common sentence I hear at consultations is: "Well, my gums have always bled a little when I brush." No. That is not normal. Healthy gums do not bleed - not when brushing, not when flossing, not spontaneously. If they bleed, that is a clinical sign that inflammation is present. Just as it would alarm you if any other tissue you are not actively striking turned red and bled.

Other signals patients commonly ignore:

  • Changed taste in the mouth - a sweet-metallic taste, especially in the morning, often indicates chronic inflammation and bleeding during sleep.
  • Persistent bad breath that doesn't go away after brushing - bacteria in deep pockets release volatile sulphur compounds that a toothbrush physically cannot reach.
  • Receding gums - "my teeth look longer than before" - often the first sign of attachment loss.
  • Cold sensitivity at the exposed tooth necks rather than the surfaces themselves.
  • Tooth movement - small gaps between front teeth that didn't exist before, or a sense that a tooth is no longer "solid".
  • Pus between tooth and gum when pressing - a late and unmistakable sign of periodontitis.

If you recognise two or more of these signals, a consultation with a dentist is not just recommended - it is necessary.

How bacteria cause bone loss - pathophysiology in plain language

To understand why periodontitis is so stubborn, it helps to understand what happens at the tissue level. The mouth hosts over 700 species of bacteria - that is normal, and most are harmless. The problem starts when plaque (soft sticky biofilm) accumulates on teeth and is not removed within 24-48 hours. Plaque then begins to mineralise into calculus (tartar), which a toothbrush can no longer remove - it stays on and below the gum line as a bacterial nest.

Beneath the calculus, anaerobic (oxygen-avoiding) bacteria multiply and release toxins. The immune system recognises this and sends inflammatory cells - lymphocytes, macrophages, neutrophils. These cells release enzymes such as matrix metalloproteinases and prostaglandins that attack not only bacteria but surrounding tissue too - including bone itself. Ironically, your body destroys its own bone in an attempt to defend itself.

As the bone recedes, a periodontal pocket forms - the space between tooth and gum measuring 4mm or more, where a toothbrush and floss physically can't reach. The deeper the pocket, the less oxygen, the more aggressive the bacteria, the greater the damage. A self-perpetuating cycle is established that doesn't break on its own - without treatment, periodontitis does not resolve spontaneously.

Risk factors - who is more likely to develop periodontitis

Hygiene is the main factor, but far from the only one. Two people with identical habits may have very different risk:

  • Smoking. The strongest modifiable risk factor. Smokers are 2-7 times more likely to develop periodontitis, and disease progresses faster and responds worse to therapy. Nicotine reduces blood flow in gums, so bleeding may not be a visible signal in smokers - which misleads them further.
  • Diabetes (especially uncontrolled). Elevated blood sugar worsens response to bacteria and accelerates bone loss. The relationship is bidirectional: periodontitis worsens glycaemic control and sugar worsens periodontitis.
  • Genetics. Certain immune-response variants make individuals more susceptible - that is why some people with poor hygiene never develop periodontitis, while others with excellent hygiene do.
  • Stress. Chronic stress raises cortisol and alters immune response - linked with faster progression.
  • Hormonal changes. Pregnancy, menopause and puberty alter gum permeability and can amplify existing inflammation (hence "pregnancy gingivitis").
  • Medications. Certain drugs (e.g. calcium channel blockers, ciclosporin, phenytoin) cause gum overgrowth that complicates hygiene.
  • Systemic disease. Osteoporosis, rheumatoid arthritis, HIV - all alter immune response and accelerate bone loss.
  • Bruxism. Grinding force overloads the ligament and accelerates its breakdown in an area already affected by inflammation.

If you recognise two or more risk factors in yourself, your recall schedule should not be standard (once a year) - we recommend every 4-6 months.

Stages of periodontitis - the 2017 classification

Modern dentistry uses the 2017 classification that divides periodontitis into 4 stages (by severity and tissue loss) and 3 grades (by rate of progression).

Stage I - initial. Attachment loss 1-2mm, pocket depth up to 4mm, no tooth loss. Clinically subtle - often discovered incidentally at a routine exam. Reversible in the sense that it can be stabilised for years without tooth loss.

Stage II - moderate. Attachment loss 3-4mm, pockets at 5mm, visible mild bone loss on X-ray. Without treatment it progresses. With adequate therapy - fully stable.

Stage III - severe. Attachment loss over 5mm, pockets 6mm and deeper, significant bone loss visible, possible loss of up to 4 teeth. Requires a combination of non-surgical and often surgical therapy.

Stage IV - advanced with functional damage. Loss of more than 5 teeth to periodontitis, loss of vertical dimension of bite, complex rehabilitation required. Often involves oral surgery and implantology.

Alongside the stage, the clinician determines a grade - A (slow progression), B (moderate), C (rapid, aggressive). Stage III grade C in a 35-year-old is drastically different prognostically from stage III grade A in a 65-year-old - even though at this exact moment they may look clinically similar.

Diagnosis - what we actually do at a periodontal exam

A proper periodontal exam is not the same as a routine dental check-up. It consists of several steps totalling 30-45 minutes:

1. History. A detailed review of general health, medications, habits, family history of periodontitis. We specifically ask about smoking (number of cigarettes and years), diabetes (HbA1c if known), pregnancy, stress, and previous dental experience.

2. Clinical examination of each tooth. This is where the periodontal probe comes in - a thin graduated probe gently inserted between tooth and gum at 6 sites per tooth (mesial, mid, distal - buccal and palatal/lingual). The recorded measurement is pocket depth in millimetres. Healthy space is 1-3mm. 4-5mm is inflammation. 6mm and above is severe periodontitis.

3. Bleeding on probing (BOP). Whether each site bleeds immediately after probing is recorded - this is an objective sign of active inflammation, independent of how the patient feels.

4. Tooth mobility. Manually checking if a tooth moves slightly in the socket - graded 0 (no movement) to 3 (movable in all directions, including vertically).

5. X-rays. Ideally a panoramic plus multiple bitewing X-rays, or 3D CBCT for complex cases. These show bone level - how much has been "dissolved" around the roots. This is an objective measure that cannot be biased or interpreted away.

6. Risk assessment and classification. All data go into the periodontal chart and we assign stage and grade. The patient receives a written treatment plan and prognosis.

In our practice we use a digital periodontal chart kept over years for comparison - so we can see whether pockets are deeper than 6 months ago, which is far more useful than a one-off snapshot.

Treating gingivitis - still a reversible story

Gingivitis is treated in 1-2 appointments and resolves. The procedure:

Professional cleaning (scaling). An ultrasonic device removes calculus from all surfaces of the teeth, both above and slightly below the gum margin. Duration 45-60 minutes for full arches. No anaesthesia needed for most patients. After scaling, teeth are polished with rubber cup and paste - not as a cosmetic step, but to remove the finest residues and make plaque accumulation harder.

Air-flow or Guided Biofilm Therapy. More modern cleaning methods combining a fine jet of sodium bicarbonate (or glycine) under pressure for gentle but effective removal of staining and plaque. Less invasive on enamel and more comfortable for the patient - we use this as first choice when there is not much hard calculus.

Hygiene instruction. Demonstration of correct brushing (Bass technique), choosing the right brush (soft, not hard - hard traumatises the gums), choice of floss or interdental brushes, possible use of an oral irrigator. Without this step, cleaning is just a "reset" - bacteria will return in 2-3 weeks.

Re-evaluation at 4-6 weeks. Checking whether the gums have responded - in gingivitis the response is dramatic: redness gone, bleeding stops, swelling subsides. If not - it may already be periodontitis, and deeper diagnostics follow.

Non-surgical therapy for periodontitis

In periodontitis, simple supragingival cleaning is not enough - bacteria are in the deep pockets that probing reveals. Scaling and root planing (SRP) is required - deep cleaning below the gum margin on the root surface itself.

Under local anaesthesia (because it can be uncomfortable at sensitive sites), with specialised curettes (Gracey curettes) and ultrasonic tips shaped for subgingival cleaning, the clinician mechanically removes calculus, biofilm and necrotic cementum from the root surfaces. The aim is for the root surface to become smooth and clean, preventing reattachment of bacteria and allowing the gums to reattach to the root.

SRP is usually performed across 2-4 appointments, one or two quadrants per appointment, depending on disease extent. After each appointment, gums react inflammatorily for 1-2 days - that is normal. After 6-8 weeks a re-evaluation is done and pockets are remeasured. In most stage I and II cases - pockets reduce by 1-3mm, bleeding stops, the disease is stabilised.

In more severe cases, SRP is supplemented with:

  • Locally delivered antibiotic agents (e.g. doxycycline gel or minocycline microspheres placed directly into the pocket and slowly releasing antibiotic). Indicated for pockets over 5mm that do not respond to SRP alone.
  • Systemic antibiotics (most often amoxicillin and metronidazole combined). Indicated for aggressive periodontitis (young patients, rapid progression) or severe grade C cases.
  • Chlorhexidine rinses (0.12-0.2%) - short-term, 2-4 weeks after SRP. Temporarily stains teeth - not for permanent use.

Surgical therapy - when the non-surgical approach is not enough

If pockets remain 6mm or deeper after SRP, or bone loss is complicated (vertical defects, furcation defects in multi-rooted teeth), surgical phase follows.

Open Flap Debridement. Under anaesthesia, part of the gum is lifted (flap) to directly see the root surface and bone. This allows removal of any remaining calculus and granulation tissue (inflammatory soft tissue replacing lost bone) that "blind" SRP cannot fully address. After cleaning, gums are repositioned and sutured. Healing takes 7-14 days.

Regenerative techniques (GTR - Guided Tissue Regeneration). In certain bone defects (narrow vertical lesions with 2-3 walls), new bone can actually be grown rather than just halting loss. Techniques include:

  • Bone graft - filling the defect with synthetic or animal-derived bone material (e.g. Bio-Oss), which acts as a scaffold on which your body lays down new bone.
  • Membrane (resorbable or non-resorbable) - a barrier preventing soft tissue from invading the space intended for bone. The body gets time to regenerate bone rather than connective tissue.
  • Enamel Matrix Derivative (EMD, Emdogain) - a protein derived from embryonic tooth development that activates periodontal ligament cells to regenerate genuine (not replacement) periodontal attachment. Clinically very effective in proper indications.

Gingivectomy and mucogingival surgery. In cases of highly hyperplastic or recurrent pockets, part of the gum is surgically removed to eliminate the pocket. With gum recession, the opposite - gum grafting from the palate or using a matrix is done to rebuild gum shape and cover exposed tooth necks.

Laser therapy - where it works, where it's marketing

Lasers in periodontology are a popular marketing topic, but the real picture is nuanced. Diode lasers (810-980 nm) and Er:YAG lasers have legitimate applications in periodontology, but they are not a replacement for SRP - they are an adjunct.

What lasers can realistically do:

  • Reduce bacterial load in the pocket after SRP (decontamination)
  • Promote tissue healing
  • Reduce the need for surgery in some borderline cases
  • Less bleeding and post-op discomfort

What lasers cannot do:

  • Mechanically remove calculus (curettes and ultrasonics still do this)
  • Cure periodontitis alone - there is no "30-minute laser treatment and done"
  • Restore lost bone (unless combined with graft and membrane)

If someone offers you "periodontitis treatment by laser only in 1-2 appointments with no other therapy", that is marketing, not medicine. A proper protocol uses laser as an adjunct to structured periodontal therapy - and is clinically shown to give better results than SRP alone, but only in combination.

After therapy - maintenance that prevents recurrence

The biggest myth about periodontitis is that it is "cured" after treatment. More accurately, it is stabilised. Bacteria return, biofilm reforms, pockets can deepen again. That is why every serious plan includes periodontal recall - structured maintenance every 3-4 months rather than the standard 6.

At each visit:

  • Repeat pocket and bleeding-on-probing measurements
  • Professional cleaning including the previously deep sites
  • Hygiene technique check and reminders on challenging zones (interdental spaces, distal sides of molars)
  • Possible adjustments - local antibiotic, repeat SRP, if a pocket is deepening again

Patients who attend 3-monthly recall appointments after completed therapy have, per clinical studies, up to 50% lower risk of recurrence over the next 10 years compared with those returning only annually. That is a measurable clinical effect - not marketing.

Home hygiene - what actually works, what's a waste of time

The best periodontitis treatment starts and ends with what you do at home. Specifically:

Toothbrush - the Bass technique. A soft brush (manual or electric) angled at 45° to the gum, with short vibrating motions of 2-3 seconds per tooth. Brushing lasts 2 minutes. Hard brushes and aggressive horizontal scrubbing are themselves a cause of gum recession - counter-intuitively, over-brushing worsens periodontitis.

Floss. Once a day, ideally in the evening, before brushing. Floss reaches interdental spaces that a brush physically cannot - and that is over 40% of the tooth surface, where pockets most commonly develop. If floss "won't go" between teeth - that is usually because the gap is narrower than you think, not because you don't need to.

Interdental brushes. For patients with existing periodontitis, where interdental spaces are larger - these are more effective than floss. Different sizes for different zones. Your dentist can recommend the right size at the consultation.

Oral irrigator. A useful adjunct, especially for patients with bridges, implants or fixed braces. Doesn't replace floss but is a great complement.

Electric toothbrush. Oscillating-rotating (Oral-B type) or sonic (Philips Sonicare type). Clinically, both give better results than manual for the average patient - simply because technique is no longer the bottleneck (the brush does the technique for you). We recommend them for anyone who does not consistently brush correctly by hand.

What does NOT work (or is questionable):

  • Baking soda for brushing - abrasive, traumatises gums and causes recession with continuous use.
  • Coconut oil, turmeric or Coca-Cola for whitening - when you have periodontitis, the focus must be on the gums, not internet fantasy remedies.
  • Chlorhexidine as a permanent rinse - effective short-term (after SRP), but long-term use stains teeth, alters taste and disturbs normal oral flora.
  • Oil pulling - harmless, but no clinical evidence it influences periodontitis at the level of professional hygiene.

The systemic link - periodontitis is not just teeth

Increasing evidence shows periodontitis is linked to systemic health in several meaningful ways:

  • Type 2 diabetes. The relationship is bidirectional. Patients with periodontitis have worse glycaemic control. Treating periodontitis clinically improves HbA1c by 0.3-0.4% in diabetics - clinically significant.
  • Cardiovascular disease. Bacteria from deep pockets enter the bloodstream and may contribute to atherosclerosis. Studies show a 25-50% higher risk of heart attack and stroke in patients with severe periodontitis.
  • Pregnancy. Severe periodontitis is associated with increased risk of preterm birth and low birth weight. Pregnancy itself alters hormonal status and worsens existing periodontitis.
  • Rheumatoid arthritis. Similar inflammatory mechanisms. Treating one disease may favourably influence the other.
  • Alzheimer's disease. Newer research suggests a link between specific oral bacteria (Porphyromonas gingivalis) and cognitive decline - still under investigation, but the signal is clear.

In other words - investing in periodontal health is not just "nice teeth". It is an integral part of general health, especially for patients with existing systemic risk factors.

Myths and misconceptions about periodontitis

"Bleeding gums are normal." - The most dangerous myth. Healthy gums do not bleed. If they bleed, there is inflammation.

"Periodontitis is genetic, so there's nothing I can do." - Genetics is a factor, but far from fatal. A patient with elevated genetic risk who maintains good hygiene and attends 3-monthly recalls can have a far better outcome than a "good gene" patient who neglects hygiene.

"If I have calculus removed, my teeth will become loose." - On the contrary. Calculus only appears to hold the tooth in place because it masks the destruction underway. Removing it reveals the true state and allows healing.

"Antibiotics cure periodontitis." - Antibiotics alone never cure periodontitis because they don't mechanically remove the cause (calculus and biofilm). In proper indications they are a useful adjunct to SRP.

"Vitamins and supplements can cure it." - Vitamin C deficiency worsens periodontitis, but rebalancing diet does not cure already developed disease. Supplements are not a substitute for treatment.

"If my teeth are already loose, it's too late." - Often true, but not always. Even in advanced disease, surgical stabilisation plus implants where teeth cannot be saved can produce a functional dentition. An honest conversation about prognosis is essential before starting work.

"Teeth whitening worsens periodontitis." - No, if done professionally with healthy gums. But before any aesthetic intervention, periodontal status must be stabilised - whitening over red, swollen gums is neither safe nor ethical.

Red flags - when to seek help urgently

Most periodontitis is managed electively with consultations and patient treatment. But some conditions require urgent care:

  • Gum abscess (swelling with pus). Painful, swollen, sometimes with fever. Drainage and antibiotics are the first step - don't wait days.
  • Sudden mobility or loosening of teeth that were stable yesterday - may indicate acute exacerbation.
  • Pus draining between tooth and gum on pressure.
  • Necrotising periodontitis - painful ulceration of the gums, especially between teeth (as if the papilla tip has been "cut off"), severely bad breath, general malaise. Rare but serious - most often in immunocompromised patients.
  • Bleeding that won't stop or is heavier than before, especially in patients on anticoagulants.

In any of these conditions, waiting worsens prognosis. Our clinic has an emergency phone and we always respond within 24h for periodontal urgencies.

Conclusion - it all starts with an exam

Periodontitis is not a disease that resolves on its own. But it is also a disease that can be completely halted - even in advanced stages - with the right diagnosis, systematic therapy and discipline in maintenance. The biggest problem is not what we cannot do medically, but that patients arrive too late, having spent years believing "bleeding is normal".

If you recognise any of the signals described - or you are unsure what stage you are in - the first step is a periodontal exam. In our clinic that does not mean a quick peek during a routine check-up, but 30-45 minutes with probe, chart, X-ray and a written plan. If it turns out to be only gingivitis - excellent news, two cleanings and hygiene instruction and you're done. If it is periodontitis - better we know now, while every millimetre of bone is still a possibility.

Our philosophy is that the patient always receives an honest plan - without over-dramatisation, but without minimising severity either. If you were told at a previous practice that your teeth are "fine" but you see bleeding when you brush - a second opinion is never wrong. Teeth you save in your 40s, you celebrate in your 70s.