Fighting plaque: tips for better dental hygiene

If oral health were a film, the heroes would be your toothbrush and floss, and the villain would be plaque.

And plaque is winning more fights than it should. According to the Australian Dental Association, over 90% of Australian adults have experienced tooth decay at some point, and over 40% of Australians aged 55 or over have experienced moderate to severe periodontitis.

So what actually works?

First, what plaque is

Plaque is a soft, sticky biofilm of bacteria that forms continuously on your teeth. It begins reforming within hours of being removed — which is why this is a daily job and not a task you can complete.

Left alone, plaque does two things. It produces acid that dissolves enamel, causing decay. And it provokes inflammation in the gums, causing gingivitis and eventually periodontitis.

Left longer, it hardens into calculus — tartar — which is cemented to the tooth and cannot be brushed off at any pressure. Once that has formed, only professional instruments will remove it. That transition is the single reason regular cleans exist.

The timeline, roughly

The useful implication: cleaning every surface once every twenty-four hours keeps you ahead of it. Cleaning three surfaces perfectly and missing two entirely does not, however long you spend.

What plaque causes, and what it looks like

Brush twice a day, properly

Concerningly, survey data suggests around one in five Australians brushes only once a day. Both parts of the instruction matter: twice daily, and thoroughly.

• Two minutes, which is longer than it feels. Split it across four quadrants.
• Soft bristles, angled at 45 degrees into the gumline. This is where plaque causes gum disease and where most people under-brush because it feels tender.
• Gently. Pressure does not remove plaque — contact and technique do. Hard brushing causes gum recession and enamel abrasion at the gumline.
• Fluoride toothpaste, and spit rather than rinse so the fluoride stays working.
• The night brush matters most, because saliva flow falls during sleep and there is nothing washing acid away for eight hours.

There is more detail on technique in what is the right way to brush your teeth.

Find out where you are actually missing

The most useful hygiene tool most people have never tried costs a few dollars at a chemist.

Disclosing tablets stain plaque a bright colour so you can see exactly where it is. Brush and clean as you normally would, then chew one and look in the mirror. The stained areas are the places your routine does not reach — and they are the same places every time, which is what makes it worth doing.

Do it once, adjust your technique, then repeat a fortnight later to check. Children find it entertaining, which is a rare thing in oral hygiene. Do it in the evening; the colour fades over a few hours.

Clean between your teeth every day

This is the step most people skip, and it is where the damage concentrates.

A tooth has five surfaces. Brushing reaches three. Skipping interdental cleaning leaves roughly 40% of each tooth uncleaned — and the surfaces between teeth are exactly where decay starts unseen and where gum disease begins.

Floss, interdental brushes or a water flosser all work. The best one is the one you will actually use every day. Many people find interdental brushes easier than floss and consequently do them more consistently, which makes them better in practice.

How to floss so it actually does something

1. About 45cm of floss, wound around the middle fingers, guided by thumbs and index fingers
2. Slide it gently between the teeth. Do not snap it down onto the gum
3. Curve it into a C shape against one tooth and slide it just under the gum edge, then move it up and down against that surface
4. Repeat against the neighbouring tooth — the same gap, two separate surfaces. This is the step nearly everyone misses
5. Use a fresh section as you move along
6. Include behind the last tooth in each quadrant

Flossing is not about dislodging food. It is about disrupting the biofilm on two tooth surfaces, which is why going in and straight out achieves very little.

Interdental brushes

Often easier and, where the gaps suit them, more effective.

• Size matters more than anything else. A brush that slides in loosely is doing nothing. It should meet slight resistance. Ask us to size you at your next visit — most people need two or three different sizes for different gaps
• Insert gently, straight in, no toothpaste required; in and out a few times
• Do not force one into a tight gap. Use floss there instead
• A brush lasts about a week. Replace it when the wire bends or the bristles flatten

Water flossers

Genuinely useful for braces, bridges, implants and limited dexterity, and clearly better than doing nothing. For most people with natural teeth they work best alongside floss or interdental brushes rather than instead of them — water flushes, but it is less reliable at disrupting a mature biofilm stuck to a surface.

If your gums bleed when you start, that usually means inflammation is already present rather than that you are doing damage. It typically settles within one to two weeks of consistent cleaning. If it does not, see us.

Do not forget your tongue

The rough surface at the back of the tongue harbours a substantial bacterial load that brushing teeth does nothing about. A daily scrape makes a noticeable difference, particularly to breath.

A dedicated scraper or the back of a toothbrush both work. Go as far back as you comfortably can, pull forward, rinse the scraper, repeat a few times. Gently — this is not meant to hurt, and gagging means you have gone too far back.

Mouthwash: what it does and does not do

Mouthwash is an optional extra. It does not remove plaque, because plaque is a physical film that has to be physically disturbed.

Do not use mouthwash immediately after brushing — it rinses away the concentrated fluoride your toothpaste just left behind.

See a hygienist regularly

Even the best brushers and flossers cannot remove 100% of plaque, and none of us can remove calculus at all. That is why a professional scale and clean every six months exists.

It is quick and straightforward, and most people find it comfortable — though if your gums are inflamed it can be tender, and anaesthetic is available if you would like it. Professional instruments remove hardened deposits from above and below the gumline and reach areas that are genuinely inaccessible at home — and your practitioner spots early problems while they are still small.

If you have periodontal disease, your recall interval will be shorter than six months, because bacteria repopulate deep sites faster.

What actually happens at a clean

1. Gums assessed, and pocket depths measured where indicated. The numbers called out are millimetres, not a score
2. Ultrasonic scaling — a fine vibrating tip with a water spray, which does most of the work. It is noisy and it is not sharp
3. Hand instruments for anything the ultrasonic leaves, particularly just below the gum edge
4. Polishing with a rubber cup and paste, which removes surface stain and leaves a smooth surface
5. Sometimes air polishing, a fine powder spray, which is gentler on stain-heavy surfaces
6. Fluoride varnish, where it is indicated
7. Advice specific to what was found — which is the part worth asking for, because it is about your mouth rather than a general page

Afterwards, sensitivity for a day or two is common, particularly if there was a lot of calculus. Gums may be tender and may bleed a little that evening. Both settle.

Who is at higher risk

Plaque behaves differently in different mouths, which is why two people with the same routine can have very different outcomes.

• Smoking and vaping — the largest modifiable risk factor for gum disease, and it suppresses the bleeding that would otherwise warn you
• Diabetes, particularly when poorly controlled. The relationship runs both ways
• Dry mouth from medication, radiotherapy or a medical condition — saliva is your main natural defence
• Pregnancy, where hormonal changes exaggerate the gum response to the same plaque
• Crowded or crooked teeth, braces, bridges and implants — more places to miss
• Genetics. Some people are simply more susceptible to periodontitis, which is not fair and is worth knowing
• Reduced dexterity, from arthritis, tremor or stroke recovery
• Immune conditions and immunosuppressant medication

If any of these apply to you, tell us. It changes your recall interval and what we recommend.

The things around the edges

• Limit sugary and acidic food and drink, and particularly limit frequency — sipping a soft drink over an hour does more damage than drinking it in five minutes.
• Drink tap water. Fluoridated, and it rinses the mouth.
• Sugar-free gum after meals stimulates saliva, your natural defence.
• Do not smoke. It is the largest modifiable risk factor for gum disease, and it masks the bleeding that would otherwise warn you.
• Replace your brush or brush head every three months, or sooner once the bristles splay.

Questions we are asked

My gums bleed when I floss. Should I stop? No — that is the strongest signal to keep going. Bleeding is inflammation. It usually settles within two weeks of daily cleaning. If it does not, book an appointment.

Is tartar the same as plaque? No. Plaque is soft and you can remove it. Tartar is mineralised and you cannot, at any pressure, with any brush.

Can I scrape tartar off myself? Please do not. Home scalers damage enamel and gum tissue, and what is below the gumline is where the problem actually is.

How often should I really be seen? Six months is a default, not a rule. Three-monthly for active gum disease; longer for some people. Ask why yours is what it is.

Does a clean loosen my teeth? No. Teeth can feel different afterwards because heavy calculus was splinting them, which is a sign of how much was there rather than a sign of harm.

Do I need to floss if I use a water flosser? For most people, both is better. If it is one or the other and you will only do the water flosser, do the water flosser.

Is bad breath always about plaque? Usually it is bacteria on the tongue or between the teeth. Sometimes it is dry mouth, reflux, sinus, or a dental problem such as an abscess or a failing filling. Worth an examination rather than more mints.

Who provides this here

Victorian Dental Group is a general dental practice in Malvern East and holds no specialist registration. Cleans are provided by our dentists and oral health therapists. Where gum disease is advanced or not responding, we refer to a registered specialist periodontist.

Book a check-up and clean

Victorian Dental Group — 291 Wattletree Road, Malvern East VIC 3145

Phone (03) 9088 5808 · book online at any hour. See check-up and hygiene.

This page is general information and does not replace advice from a registered dental practitioner about your own circumstances. Please see our Disclaimer.