Somewhere between every three months and once a year, depending on your risk — and “every six months” is a convention, not a clinical law.
Twice a year is the answer almost everyone has been given, and for a large slice of the population it is roughly right by accident. It did not come out of research. It came out of habit, and it survives because it is easy to remember and easy to schedule.
Your interval should be set by how fast things go wrong in your particular mouth. A 27-year-old with no fillings, healthy gums and good home care is over-serviced at six months. A smoker with treated periodontitis is under-served at the same interval and will lose bone between appointments. Working out which you are is the point of a proper dental examination — the risk assessment more than the appointment itself.
Where “Every Six Months” Came From
Nobody discovered six months. There is no trial establishing it as optimal for the general population, and reviews of the evidence have repeatedly found the case for fixed six-month recalls weak in low-risk adults.
It spread through public health messaging, military dental programmes, toothpaste advertising, and the fact that a half-year rhythm is easy to run. Insurance built coverage around it and locked it in — when a plan pays for two cleanings a year, two is what people have. National guidance has moved towards risk-based recall for years; most practices have not, because assessed intervals require the dentist to make and justify a judgement.
What Actually Determines Your Interval
- Gum disease history. The biggest single factor. Lost attachment does not grow back and the disease recurs when biofilm is left undisturbed. Treated periodontitis is maintained, not cured.
- Decay rate. New cavities in the last three years is the best available predictor of the next three.
- Smoking. It suppresses gum bleeding while accelerating bone loss, so the warning sign disappears as the disease speeds up.
- Diabetes. It runs both ways: poor glycaemic control worsens gum disease, and gum inflammation worsens glycaemic control.
- Dry mouth. Saliva buffers acid, clears food and returns minerals to enamel. Hundreds of common drugs reduce it — antidepressants, antihistamines, blood pressure medication, diuretics. It can move a low-risk adult to high risk within a year, and most people never connect the two.
- Diet. Frequency of sugar and acid matters more than quantity. Sipping something sweet across an afternoon is far worse than the same drink in ten minutes.
- Pregnancy. Hormonal change commonly causes gingivitis, and dental care while pregnant is safe rather than something to postpone.
- Orthodontic appliances, which give plaque somewhere to hide, and existing restorations, because a mouth full of large old fillings has more margins available to fail.
- Home cleaning, honestly assessed. If you do not clean between your teeth, that is a risk factor, and pretending otherwise helps nobody.
A Risk-Tier Guide
| Profile | Suggested interval | |
|---|---|---|
| Low risk | No decay in 3+ years, healthy gums, non-smoker, no dry mouth, cleans between teeth daily | 12 months |
| Moderate risk | Occasional new decay, gingivitis that comes and goes, several large restorations | 6 months |
| High risk | Active or treated periodontitis, multiple new cavities, smoker, diabetic, significant dry mouth | 3-4 months |
| Very high risk | Head and neck radiotherapy, severe dry mouth, immunosuppression, rampant decay | 3 months or shorter, with extra preventive measures |
Treat that as the start of a conversation, not a diagnosis. Risk moves — a new medication, a pregnancy, quitting smoking — and the interval should move with it rather than being set once in your thirties and never revisited.
Who Genuinely Needs Every Three or Four Months
Anyone with periodontitis, active or treated. The aim after therapy is to disrupt the subgingival biofilm before it re-establishes, and roughly three months is where recolonisation starts to matter. Stretching a periodontal patient to six months is how carefully treated cases quietly relapse. Ongoing gum disease maintenance is a different service from a routine recall clean.
And anyone in an active decay phase — several new cavities in a short period, usually with dry mouth or a high-frequency sugar habit behind it. Short intervals there are about catching lesions small and about fluoride, not about the cleaning.
Who Can Reasonably Go Once a Year
If you have had no new decay in several years, no bleeding gums, no pocketing, do not smoke, are not on drying medication, and genuinely clean between your teeth daily, annual attendance is defensible. Not risk-free — nothing is — but better supported by the evidence on low-risk adults than a reflex six months.
We would rather tell you that and see you once a year for twenty years than book you twice a year, have you feel over-sold, and lose you entirely. The condition is that you come back when something changes: new sensitivity, bleeding when you clean, a rough edge, or a lump that has not gone in two weeks.
Children Follow Different Logic
Children are not scaled-down adults here. Their teeth are on a schedule — eruption, exfoliation, permanent molars at roughly six and twelve — and decay moves faster through them, because primary enamel is thinner and the pulp relatively larger. A six-month gap covers more ground in a five-year-old than in a forty-year-old.
Regular short visits also build tolerance before anything difficult is needed, and the first permanent molars need watching as they erupt because that is when sealants are worth placing. Most children do well on six months, more often where decay is active. That is ordinary children’s dental care, not anything specialist, and running the household through one family practice makes scheduling far less painful.
The Cleaning Interval and the Exam Interval Are Not the Same
Almost everyone conflates these, including plenty of dental staff.
The examination is diagnostic: teeth, gums, restorations, bite and soft tissues, with X-rays at appropriate intervals — not at every visit. The cleaning is therapeutic. How long a cleaning takes depends on how much there is to remove, and what happens during it is more involved than most people assume.
These can run on different clocks. Someone with immaculate gums and heavy calculus might need a scaling appointment every four months and an examination annually; someone with fragile restorations and no calculus needs the reverse. Bundling them permanently into one six-month slot is administratively tidy and clinically lazy. Ask which is driving your recall. If nobody can answer, the interval was not really chosen.
What a Checkup Finds That You Cannot
- Interproximal decay. Cavities between teeth are invisible and painless until large. Bitewings catch them while a filling is still all that is needed.
- Bone loss. Probing and radiographs measure attachment loss long before a tooth feels loose. By the time it wobbles, most of the support is gone.
- Oral cancer screening. Two minutes over tongue, floor of mouth, palate and throat. Early oral cancer is painless and survival depends heavily on stage at diagnosis.
- Failing restorations and grinding wear, all found before you feel anything.
The Cost Argument, With Real Numbers
Under the 2026 ODA Suggested Fee Guide — published each January by the Ontario Dental Association as a suggested guide, not a mandated price list — a recall examination in Ontario runs $96 to $182 and a four-unit cleaning of about an hour is $261. Call it $350 to $450 for a routine visit with a clean, before X-rays.
The other side: a molar root canal with four or more canals is $1,417 in the same guide, $1,579 where access is difficult, and that tooth then needs a crown at $1,349 to $1,449 including the lab fee. Roughly $2,800 to $3,000 for one tooth that began as a small cavity nobody looked for.
One avoided root canal and crown pays for six or seven years of recall visits. That is not an argument for attending more often — it works identically at an annual interval — but for attending at the interval your risk justifies.
The Canadian Dental Care Plan covers examinations and scaling for eligible patients, though it pays on its own fee schedule, which can sit below the ODA guide, and the gap is not covered: a 0% co-payment does not always mean nothing to pay. Our fees and payment page sets out how estimates work, and if cost is why you have not been in for years, there are ways to make this work. The expensive end is covered in our post on root canal costs in Ontario.
Frequently Asked Questions
Is going to the dentist once a year enough?
For a genuinely low-risk adult — no recent decay, healthy gums, non-smoker, good home cleaning — yes. For anyone with gum disease, frequent cavities or dry mouth, no.
What happens if you do not go to the dentist for 10 years?
Usually decay past the filling stage, calculus build-up and some gum disease. Almost always fixable, and usually cheaper to start than people fear. An examination and a staged plan come first.
I have not been in years and I am embarrassed. What now?
Come in. We have seen worse than whatever you are picturing, and the appointment is an examination and a plan, not a judgement. Start with our new patient information.
We Will Tell You If You Can Go Longer
Setting everyone to six months is the easy option and it is what most of the industry does. We would rather assess your risk, tell you what interval it justifies, and revisit it when things change — including when that means seeing you less often than you expected.
Book online or contact the office and ask what your interval should be. More on routine care and what it costs is collected on the blog.
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