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Periodontal maintenance
The ongoing care that follows gum disease treatment. Not a longer cleaning under a different name — a different appointment, with a different purpose and a different clock.
Reviewed by Dr. Raj Singh, General Dentist, Dentistry at Vitality Health
Periodontal maintenance is the ongoing professional care that follows treatment for gum disease. It is not the same appointment as a routine cleaning: the gums are measured and charted each time, the cleaning goes below the gum line into the pockets that remain, and it usually runs every three months rather than every six.
If you have been told you need to come in every three months from now on, this page explains why, what actually happens at those appointments, and what the evidence does and does not show about keeping them up.
The short version: periodontitis is a chronic condition. Treatment brings it under control. It does not get rid of it, and the bacteria that caused the damage are still living in the pockets that remain. Maintenance is what keeps a treated mouth stable — see periodontal treatment for the active course that comes first, and gum disease for the condition itself.
Why it exists: gum disease is controlled, not cured
Most dental problems have an end. A cavity is filled and the episode is over. Periodontitis does not work like that. It is a chronic inflammatory condition driven by bacteria that live below the gum line, and the current understanding in periodontology is blunt about it: the disease can be treated, but not eradicated.
What treatment achieves is real, and worth having. Scaling and root planing removes the deposits, the inflammation settles, the pockets shallow, and the bone loss stops. What it does not do is change the fact that your mouth has proved it can lose bone to plaque. The pockets that remain are deeper than a healthy sulcus, harder to clean, and hospitable to exactly the bacteria that caused the problem.
Maintenance is the answer to that. It is not a sign that treatment failed. It is the second half of the treatment.
How it differs from a regular cleaning
The two appointments look similar from the chair, which is why the distinction gets lost. They are aimed at different mouths.
| Routine cleaning | Periodontal maintenance | |
|---|---|---|
| Who it is for | A mouth with healthy gums and no history of bone loss | A mouth already treated for periodontitis |
| What is measured | A gum screening; a full chart occasionally | Pocket depths and bleeding points at each visit, full-mouth charting at least once a year |
| Where the cleaning reaches | Mainly above the gum line, plus shallow areas below | Into the residual pockets, below the gum line, where the bacteria actually are |
| Usual interval | Six to twenty-four months, set by risk | Three to twelve months, most often three |
| When it ends | It does not — it is ordinary preventive care | It does not either — it continues indefinitely |
The other appointment people confuse it with is the deep cleaning. Scaling and root planing is the treatment, usually done in sections under local anaesthetic when periodontitis is first diagnosed. Maintenance is what comes after it. One is the course; the other is keeping the result.
Why the interval is usually three months
Because that is roughly how long it takes the bacteria to come back.
A study published in the Journal of Clinical Periodontology in 2019 sampled the bacterial community below the gum line in treated patients immediately after debridement, then again at two, eight and twelve weeks. Diversity and the proportion of disease-associated species dropped sharply after the cleaning, then recolonised steadily. By week twelve they were back to where they had started.
That is the entire argument for the interval. A three-month appointment is timed to interrupt recolonisation before it fully re-establishes. Leave it six months and the second half of that period is spent with the biofilm completely back in place, working on bone that is already reduced.
It is worth being straight about the limits of that reasoning, though. A 2019 review in Periodontology 2000 concluded that the right interval between maintenance visits has not actually been determined, and that it should be set by the individual patient's needs rather than by the three-month figure that has been accepted historically. Three months is a sensible default with a biological rationale behind it. It is not a number anyone has proved.
In practice the range runs from three months to a maximum of twelve, set by your history, how much pocketing remains, how the bleeding scores look, whether you smoke, and what you are realistically able to manage at home. It is reassessed at every visit, not fixed once. Plenty of people move out to four or six months and hold there.
What happens at a maintenance visit
More than a cleaning, and the measuring is not a formality — it is what decides the plan.
- Your history is updated. A new medication, a new diagnosis, a change in smoking, a pregnancy. Each of these changes your risk, and the interval with it.
- The gums are measured and compared. Pocket depths and bleeding points, set against the last readings. A full-mouth periodontal chart at least once a year. A single set of numbers tells you very little; the comparison tells you everything.
- Deposits are removed above and below the gum line. In a treated mouth that means working into the residual pockets, which a routine cleaning does not do.
- Plaque traps get corrected. An overhanging filling, a rough crown margin, a contact that shreds floss. These places fail first and no amount of brushing fixes them.
- The coaching is specific. Not “floss more”, but which sites are bleeding and what will actually reach them — often an interdental brush of a particular size rather than floss at all.
- The plan is adjusted. If the readings have drifted the wrong way, the interval shortens, or a site goes back for re-treatment. That is the point of measuring.
Your hygienist carries out most of this, working to the plan set at the periodontal assessment. More on what you can do between visits at looking after your teeth at home.
What the evidence says about keeping it up
Most people drift out of maintenance eventually. The periodontal literature is quite candid that an unacceptable proportion of patients stop attending sooner rather than later, and knowing that is half of doing something about it.
What happens to the people who do keep going is reasonably well documented, though the picture is more measured than the usual warnings suggest.
- A five-year prospective study of 212 patients who had completed periodontal treatment compared regular attenders with irregular ones. The regular group lost 0.12 teeth a year. The irregular group lost 0.36 — three times the rate.
- A 2021 systematic review pooling fourteen studies found a more modest effect: patients who did not comply with maintenance had a 26% higher risk of tooth loss than those who did.
- Smoking, being older than 55, and deeper residual pocketing each raised the risk independently, in both groups.
The honest caveat is that these are observational studies. People who attend regularly differ from people who do not in ways that are hard to adjust for, and there are no randomised trials — which is why the 2019 review described compliance as something that could be considered a factor in tooth survival rather than something proven. The direction of the evidence is consistent. The size of the effect is less certain than a scare story would have it.
What maintenance can and cannot do
It can keep a treated mouth stable, sometimes for decades. Bleeding scores and plaque levels fall, and progression slows or stops.
It cannot regrow bone that has already gone. Nothing in routine periodontal care does. If a tooth has lost half its support, maintenance is about keeping the other half — and we will not suggest otherwise.
It also cannot substitute for what happens at home. Two or three appointments a year come to a couple of hours. You brush for something like forty hours in the same period. The professional part interrupts the biofilm; the daily part decides how fast it rebuilds.
If teeth have already loosened, or if some cannot be kept, that is a separate conversation — see loose teeth and tooth loss from gum disease.
Who provides it, and what it costs
Your hygienist, in this practice, working to a plan set with the dentist after the periodontal assessment. The dentist reviews the charting and examines at the agreed intervals.
On cost: most insurance plans do cover periodontal maintenance, usually under a different code from a routine cleaning and sometimes against a different annual limit, which is why the coverage can look confusing on a statement. We submit electronically and will go through what your plan pays before you commit to a schedule rather than after. We also accept the Canadian Dental Care Plan. More on insurance and financing.
How common is this, really?
Common enough that it should not feel like a special case. Statistics Canada's 2022–2024 Canadian Health Measures Survey — the first clinical oral-health measurements taken in this country in more than fifteen years — found that 83% of adults aged 20 to 79 had gums that bled on probing at one tooth or more, and that just over a third had periodontal pocketing of 4 mm or deeper, against one adult in five in 2007–2009.
Gum health in Canada is getting worse, not better. If you have been placed on a maintenance schedule, you are in a large and growing group, and you are in the part of it that is doing something about it.
Common questions
What is the difference between periodontal maintenance and a regular cleaning?+
Purpose, not length. A routine cleaning keeps a healthy mouth healthy and works mainly above the gum line. Periodontal maintenance looks after a mouth that has already lost bone to gum disease: the pockets are deeper, the bacteria are still in them, the gums are measured and charted at each visit, and the cleaning goes below the gum line into those pockets.
Is periodontal maintenance the same as a deep cleaning?+
No. A deep cleaning — scaling and root planing — is the active treatment when periodontitis is first diagnosed, usually done in sections with local anaesthetic. Maintenance is what follows it, indefinitely. One is the course of treatment; the other is keeping the result.
Why every three months instead of every six?+
Because the bacteria below the gum line come back in roughly that time. A study that tracked the bacterial community after debridement found it recolonising steadily and back to pre-treatment levels by twelve weeks. Three months is timed to interrupt that rather than clean up after it. The interval is reassessed each visit and can lengthen to four or six months if the readings hold.
Do I have to do this forever?+
In most cases yes, in the same way that blood pressure treatment continues. Periodontitis can be controlled but not eradicated, and the pockets that remain do not become self-cleaning. What can change is the interval — for a mouth that stays stable, it often lengthens over time.
What happens if I stop going?+
The evidence is observational rather than randomised, so it should be read carefully. A five-year study of treated patients found regular attenders lost 0.12 teeth a year against 0.36 for irregular attenders, and a 2021 review of fourteen studies found a 26% higher risk of tooth loss among those who did not keep up maintenance. The direction is consistent; the size of the effect is less certain than it is often made to sound.
Does insurance cover it?+
Most plans do, though often under a different code from a routine cleaning and sometimes against a separate annual limit, which is why statements can be confusing. We submit electronically and will go through what your plan covers before you commit to a schedule. We also accept the Canadian Dental Care Plan.
Sources: Lu H et al. Microbiome in maintained periodontitis and its shift over a single maintenance interval of 3 months. J Clin Periodontol 2019;46:1094–1104 · Echeverría JJ et al. Adherence to supportive periodontal treatment. Periodontol 2000 2019;79:200–209 · Costa FO et al. Tooth loss in individuals under periodontal maintenance therapy: 5-year prospective study. J Periodontal Res 2014;49:121–128 · Campos ISO et al. The effects of patient compliance in supportive periodontal therapy on tooth loss: a systematic review and meta-analysis. J Int Acad Periodontol 2021;23:17–30 · Statistics Canada. Canadian Health Measures Survey, oral health measures, 2022–2024. The Daily, 1 December 2025 · SDCEP. Prevention and Treatment of Periodontal Diseases in Primary Care — supportive periodontal care
Gum treatment runs in three parts
Periodontitis is a chronic condition, so the course does not finish — it changes shape. Knowing which part you are in makes the rest of it make sense.
1. Gum disease
The condition itself — what it is, what you would notice, and what decides how serious it is.
2. Periodontal treatment
The active course. Cleaning below the gum line, re-measuring, and treating whatever has not responded.
You are here
3. Periodontal maintenance
What follows, indefinitely. Usually every three months, because that is how fast the bacteria return.
Due for a periodontal review?
If it has been a while, or you are not sure whether you are on a maintenance schedule at all, a gum assessment will tell us. Pocket depths and bone levels measured properly, then a plan.