What raises your risk of periodontitis? The full list — and the parts you can actually change

A patient in her fifties who has brushed twice a day her whole life turns up with pockets of six and seven millimetres. Her neighbour, who admits to skipping the evening brush more often than not, has gums that bleed a little and nothing more. This is one of the most frustrating things about gum disease, and one of the most misunderstood.

Plaque is necessary. Without the bacterial film along the gum line, periodontitis does not start. But the damage that follows is done largely by your own immune response to that film — and the intensity of that response, how long it runs, and how much bone it costs you, varies enormously from person to person. Risk factors are simply the things that turn that response up or leave it running.

That is why “just brush better” is incomplete advice. It is necessary. For a good number of patients it is not sufficient, and the reasons are set out in Periodontitis despite good oral hygiene: why brushing alone is not enough (EN).

If there were one thing to take from this article, it would be this one. Smoking is the strongest modifiable risk factor for periodontitis that has been identified, and it works through several mechanisms at once: it constricts the small blood vessels in the gum, blunts the immune cells that patrol the pocket, and shifts the bacterial mix towards the more aggressive species.

It also hides the disease. Nicotine reduces bleeding, so a smoker’s gums often look deceptively calm while attachment is being lost underneath. The classic pattern is a smoker who has never seen blood on the brush and is astonished by the pocket measurements. Smokers also respond less well to treatment and lose more teeth over a lifetime than non-smokers with comparable disease.

The good news is unusually concrete: risk falls after stopping, and gums treated after a stop respond better than gums treated during continued smoking. Many statutory funds subsidise stop-smoking programmes as part of their prevention budget — it is worth a phone call to yours to ask what they offer. Vaping is not a safe substitute in this context; the evidence on e-cigarettes and gum health is still developing, and the current signals are not reassuring. What actually changes when someone stops is covered in Periodontitis from smoking: what a stop really changes (EN).

Diabetes and periodontitis feed each other. Poorly controlled blood sugar impairs healing, alters the immune response in the gum and increases the risk of periodontitis and its severity. And it runs the other way: an active gum infection makes blood sugar harder to control, so treating the gums can support metabolic control too. German and international diabetes and dental associations both recognise this connection, which is why an HbA1c value belongs in a periodontal work-up.

The word doing the work here is controlled. A patient with well-managed diabetes is in a very different position from one whose values have been drifting for years. If you have diabetes, tell us — and tell your diabetologist that you are having periodontal treatment.

Cleaning between the teeth, not just on them. A toothbrush reaches roughly three of the five surfaces of a tooth. Periodontitis starts in the two it misses. This is why interdental brushes, correctly sized, matter more than upgrading your toothbrush.

Plaque traps. Overhanging filling margins, poorly fitting crowns, crowded or rotated teeth, an old bridge with an awkward underside, a partial denture that presses on the gum, and tartar (Zahnstein) itself — all of them create surfaces that cannot be cleaned. Fix the trap and the local problem often improves on its own.

Chronic stress and poor sleep. Sustained stress affects immune regulation, and in practice it also degrades routines: people under pressure brush faster, eat worse, smoke more and postpone appointments. Both mechanisms are real.

Teeth grinding (Bruxismus). Grinding does not cause periodontitis. It can accelerate the consequences at teeth that have already lost bony support, which is why a night guard (Knirscherschiene) sometimes appears in a periodontal plan.

Dry mouth. Saliva is a defence system. Many everyday medications reduce saliva flow — some blood pressure drugs, antidepressants, antihistamines — and a persistently dry mouth is a genuine risk factor. Some medications can also cause gum overgrowth, which creates pockets that are impossible to clean.

Diet and weight. A diet heavy in sugar and ultra-processed food feeds the biofilm and drives systemic inflammation. Obesity is independently associated with a higher risk of periodontitis.

Mouth breathing. Chronic mouth breathing dries the gum at the front, and those gums inflame more readily.

Hormonal phases. Pregnancy, puberty and the menopause change how gum tissue reacts to the same amount of plaque. Pregnancy in particular deserves its own attention — see Periodontitis in pregnancy: what bleeding gums mean (EN).

Your genetics. Susceptibility runs in families, and some people mount a much more destructive inflammatory response to the same bacterial load. This is real, and it is not a sentence: it changes how closely you should be monitored, not whether treatment works. The detail is in Is periodontitis hereditary? What a family history really means (EN).

Your age. Risk rises with age, mostly because exposure accumulates. Periodontitis is not a normal part of ageing, and losing teeth is not something to accept as inevitable at 70.

Attachment and bone you have already lost. Bone that has gone does not grow back on its own. A tooth that has lost support stays a higher-risk tooth for life, even after successful treatment — which is precisely why aftercare intervals are shorter for people who have already had the disease.

Certain systemic conditions, including some immune disorders and their treatments.

The point of the table is not to memorise it. It is to notice that the top of the list is almost entirely made of things that can be changed.

This is where the topic becomes practical rather than academic. When periodontitis is diagnosed here, it is not simply recorded as present or absent. It is classified by how far it has advanced and — separately — by how fast it appears to be progressing. Smoking status and diabetes control are explicitly part of that second judgement.

That classification is not a label for the file. Periodontitis treatment is a statutory health insurance benefit that runs on its own approved plan: the findings and X-rays are submitted to your fund, the fund approves the plan, and only then does the therapy begin. The plan then continues into a staged aftercare programme — supportive periodontal therapy, in German unterstützende Parodontitistherapie or UPT — and how often you are seen within it is derived from that risk grading. In plain terms: a smoker with rapidly progressing disease is scheduled for more frequent supportive appointments than someone with slow, mild disease, and that is a feature of the system rather than an upsell. The mechanics of coverage are explained in Does statutory health insurance pay for periodontitis treatment? (EN).

So the honest summary is: your risk factors decide your appointment calendar for the next few years. Changing them changes the calendar.

If you have several risk factors at once, the interaction is more than additive — a smoker with diabetes is in a distinctly higher category than either factor alone, and that combination should be assessed sooner rather than at the next routine visit.

Preventive dentistry is organised differently here from most countries, and two points are worth knowing. First, gum screening belongs in the standard dental check-up (Kontrolluntersuchung) that statutory insurance covers — you have to attend to get it. Second, a professional cleaning (professionelle Zahnreinigung, PZR) is usually a private service you pay for or claim from a supplementary policy (Zahnzusatzversicherung), even though it is one of the most useful things you can buy for a mouth with risk factors.

If your German is not yet up to a clinical conversation, do not let that delay the first appointment. We treat patients in English, and the team also covers German, Russian, Turkish, Ukrainian, Arabic, Kurdish and French. Patients travelling from Düsseldorf, Cologne or Bonn generally reach us in 20 to 30 minutes, which for an English-speaking dental appointment is a normal journey — more on that in English-Speaking Dentist in NRW.