A routine recall cleaning takes about 30 to 60 minutes. Add the examination and you are usually looking at an hour in the chair.
Nobody can give you a single number because dental cleaning in Ontario is measured, scheduled and billed in units of scaling time — roughly fifteen minutes each. Four units is about an hour. Six is about ninety minutes. Your appointment length is a judgement about how many units your mouth needs, made before you sit down and revised while you are there.
Everything below explains what pushes that number up or down. If you are booking a cleaning appointment and need to know how much of your day to block out, plan for an hour and be pleased if it runs short.
Units, and Why They Explain Everything
Ontario dentistry codes scaling by time, not by tooth. One unit is approximately fifteen minutes of active scaling. The 2026 ODA Suggested Fee Guide — published each January by the Ontario Dental Association as a suggested guide, not a mandated price list — puts scaling at $65 to $70 per unit in Ontario, which works out to about $261 for four units and $391 for six.
| Time in the chair | Ontario guide fee, 2026 | |
|---|---|---|
| 1 unit | About 15 minutes | $65-$70 |
| 2 units | About 30 minutes | $130-$140 |
| 4 units | About an hour | $261 |
| 6 units | About 90 minutes | $391 |
Those are scaling figures alone. Polishing, fluoride varnish at $38 and the examination are separate items; our fees and payment page covers how estimates work here.
When someone says a cleaning “takes about an hour”, they mean most people need about four units. It is an average, not a rule, and it is why your friend was out in twenty-five minutes and you were in there for ninety.
Insurance plans usually cap units per year, which catches people out. If your plan covers four and you need six, the extra two are yours. Check before the appointment rather than at the desk afterwards.
What Happens in Each Phase
- Assessment, 5-10 minutes. Soft tissues, then periodontal probing — a graduated probe measures pocket depth around each tooth in several places. Under 3 mm with no bleeding is healthy. Deeper pockets that bleed mean disease and change what the appointment is for. This is where the number of units gets set.
- Ultrasonic scaling, 10-25 minutes. A vibrating tip and water spray break up and flush away the bulk of the calculus. The noise is the worst part. It is also the fastest way to shift hard deposits.
- Hand scaling, 10-20 minutes. Curettes and sickle scalers finish what the ultrasonic left, especially below the gumline where tactile feedback matters more than power. The slow, careful part.
- Polishing, 3-5 minutes. A rubber cup and prophy paste remove surface stain and smooth the enamel.
- Flossing, 2-3 minutes. Clears paste and debris, and shows where things are being missed at home.
- Fluoride varnish, 2 minutes. One of the highest-value two minutes in dentistry.
Our post on how tartar is actually removed goes into the instruments in more detail.
What Makes It Take Longer
- Time since your last cleaning. The biggest factor. Six months of deposit is a routine four units. Six years can be two appointments.
- Heavy calculus formation. Some people build tartar quickly because of their saliva chemistry. Not a character flaw, and not entirely within your control.
- Inflamed, bleeding gums. Bleeding obscures the field and the tissue is tender, so the work goes slower. Inflammation also signals subgingival deposit to find, which takes longer than scraping visible tartar off the front of a tooth.
- Being a new patient. First appointments include history-taking, charting every tooth and restoration, full periodontal charting and usually X-rays. See what happens at a first visit and new patient information before you come.
- Sensitivity. Sensitive root surfaces slow everything down, and should — the answer is to go gently, not push through.
- Deep staining. Tea, coffee, red wine and tobacco take real polishing time. Polishing removes surface stain only; it does not change the underlying tooth colour, which is what whitening is for. Anyone selling a cleaning as a whitening treatment is overselling.
- Orthodontic appliances, bridges and implants, all of which need working around.
The Checkup Is Usually in the Same Appointment
Most recall appointments combine an examination with the cleaning, adding ten to twenty minutes: every tooth and restoration, the bite, the soft tissues, an oral cancer screening, and X-rays if due.
Radiographs are not routine at every visit. Bitewings are commonly every twelve to twenty-four months for a low-risk adult, more often where decay is active. If you are X-rayed every single time with no reason offered, ask why.
The two parts serve different purposes and can run on different schedules. Our post on how often you should see a dentist explains why the cleaning interval and the examination interval are not the same thing.
Scaling and Root Planing Is a Different Procedure
If you have periodontal pockets — attachment loss, bone loss, deep pockets that bleed — a routine clean is not the treatment. Scaling and root planing goes below the gumline to remove calculus and contaminated deposit from the root surfaces themselves, and to leave those surfaces smooth enough that the tissue can reattach.
It takes considerably longer, usually split across two appointments of an hour or more, half the mouth at a time. Local anaesthetic is often used, because working millimetres below the gum on sensitive root surfaces is not comfortable otherwise; how long dental freezing lasts is typically three to five hours for the soft tissue.
Expect a review four to six weeks later to re-probe, then maintenance every three or four months rather than six. This is gum disease treatment rather than routine hygiene — a treatment course, not a single visit. If anxiety is what has kept you away, sedation options are worth asking about before you decide to keep avoiding it.
How to Make Your Cleaning Shorter
The honest answer is unglamorous and it works: clean between your teeth every day.
Not brushing harder, and not a more expensive electric brush, though a decent one helps. Interdental cleaning — floss, interdental brushes, whichever you will actually use — removes plaque from the two surfaces a toothbrush cannot reach, which is exactly where calculus forms and exactly where the hygienist spends most of her time. The second thing is angling the brush into the gumline rather than scrubbing the middle of the tooth, because calculus forms at the margin, not on the bulge.
This is a section arguing you into buying less of what we sell, and it is still true. Someone who cleans between their teeth daily might drop from six units to four. Over ten years that is real money and a lot of your time back.
Turning up is the other half. People who stretch appointments out because they are dreading them end up needing longer ones, which makes the next worse. If cost is what has kept you away, say so — there are ways to make care affordable, and CDCP coverage includes scaling for eligible patients, though the plan pays on its own fee schedule, which can sit below the ODA guide, and the gap is not covered.
Children’s Cleanings Are Shorter
A child’s cleaning is usually 15 to 30 minutes — fewer teeth, less calculus, and often nothing beyond a polish with a rubber cup and fluoride varnish. The appointment is structured differently too: shorter, more explanation, and it stops if the child has had enough. That is standard children’s dentistry, not anything specialist, and easier than most parents expect.
Frequently Asked Questions
How long does a deep cleaning take?
Scaling and root planing is normally two appointments of an hour or more, half the mouth at a time. Some cases are split into four quadrant appointments instead.
Why did my cleaning take longer than my partner’s?
More calculus, deeper pockets, more bleeding, or longer since your last visit. Units are set by what is actually there, not by a standard slot.
Does a dental cleaning hurt?
Routine cleaning is generally uncomfortable at worst — vibration, water, occasional sensitivity. Inflamed gums are tender and bleed, which makes it less pleasant, and that improves once the inflammation settles. Deep cleaning below the gumline is usually done with freezing.
How often should I get my teeth cleaned?
Between three months and a year, depending on your risk. Three to four months for anyone with treated gum disease; annually is defensible for a genuinely low-risk adult who cleans between their teeth daily.
Will a cleaning whiten my teeth?
It removes surface stain, which often makes teeth look noticeably brighter. It does not change the underlying tooth colour. That is a different treatment with a different price.
Is it normal for my gums to bleed during a cleaning?
Common, and it means the gums are inflamed rather than that the hygienist is rough. Bleeding that stops within a fortnight of proper home cleaning was gingivitis; bleeding that persists needs looking at properly.
Book Your Cleaning
Tell us when you were last seen and whether your gums bleed. That is enough for us to book the right length of appointment rather than running you over time or having you sit in an empty slot.
Book online or contact the office. Booking the whole household at once is straightforward through our family dentistry side, and small cavities found at a recall are usually handled with a simple filling. Other questions about routine appointments are answered on the blog.
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