Plaque is removed from teeth through daily brushing and flossing at home, and through professional cleaning at a dental office for buildup that has hardened into tartar. Soft plaque reforms on tooth surfaces within 24 hours of cleaning, so removal is an ongoing process rather than a one-time fix. If left undisturbed for 10 to 20 days, plaque mineralizes into calculus (tartar), which can only be removed with professional instruments.
Why Plaque Keeps Coming Back
Within seconds of brushing, a thin film of proteins from your saliva coats every tooth surface. This film is harmless on its own, but it acts as a landing pad for bacteria. A small number of bacterial species attach first, then produce a sticky, gel-like substance that anchors them in place and allows other species to pile on. After about 24 hours, this bacterial colony is substantial enough to be called plaque, the soft, slightly fuzzy coating you can feel with your tongue.
Plaque at this stage is easy to remove mechanically. The challenge is that it begins hardening through mineral absorption from your saliva. It can start calcifying in as little as four to eight hours, though full mineralization into tartar typically takes 10 to 12 days. Once hardened, no amount of brushing or flossing will budge it.
Brushing: Your Primary Tool
A toothbrush physically shears the bacterial film off smooth tooth surfaces. Brushing twice a day keeps plaque from maturing long enough to harden. Technique matters more than the specific brush you use: angle the bristles toward the gumline at about 45 degrees and use short, gentle strokes rather than scrubbing side to side. Electric toothbrushes with oscillating or sonic heads can make this easier, especially for people who tend to brush too aggressively or too quickly.
Fluoride toothpaste plays a supporting role. While the bristles do the mechanical work, fluoride strengthens enamel against acid attacks from plaque bacteria. Some toothpastes also contain ingredients designed to slow bacterial growth or reduce the sticky matrix that holds plaque together, though the physical disruption from brushing itself is what does the heavy lifting.
One useful upgrade is a plaque-disclosing toothpaste or tablet. These contain a harmless dye that stains plaque pink or purple so you can actually see what you missed. In clinical testing, brushing with a plaque-disclosing dye led to roughly 51% plaque reduction between dental visits, compared to just 8% for people brushing without the visual feedback. Disclosing tablets are inexpensive and available at most pharmacies.
Cleaning Between Teeth
Brushing alone misses the surfaces where teeth touch each other, which is where cavities and gum disease often start. You need a separate tool for these spots. The two main options are traditional string floss and interdental brushes, the tiny bottle-brush-shaped picks that fit between teeth.
Research consistently shows interdental brushes remove more plaque from between teeth than floss does. In comparative studies, interdental brushes produced lower plaque scores in the spaces between teeth and greater improvements in gum health over 6 and 12 weeks. Floss performs better mainly among people with excellent manual dexterity. For most people, especially those with gaps large enough to fit the brush through, interdental brushes are the more effective choice. If your teeth are tightly spaced with no room for a brush, floss is still the right tool.
What Happens During a Professional Cleaning
A professional cleaning targets what you can’t remove at home: hardened tartar above and below the gumline, plus stubborn plaque in areas your brush and floss don’t reach well. There are several approaches, and most cleanings use a combination.
Scaling
Scaling is the core of any professional cleaning. Your hygienist uses either hand instruments or an ultrasonic scaler to physically scrape tartar off tooth surfaces. Hand instruments, called curettes, have curved tips that let the hygienist feel along root surfaces and work around complex anatomy like the curves between tooth roots. Ultrasonic scalers vibrate at high frequency and spray water simultaneously. The vibration shatters tartar deposits, while the water flushes debris away and creates tiny collapsing bubbles that help disrupt bacterial films. Newer micro-ultrasonic tips are thin enough to reach deep gum pockets, root grooves, and the spaces where roots branch apart.
Both methods are effective. Ultrasonic scaling tends to be faster, while hand instruments give the hygienist more tactile feedback in tricky spots. Most cleanings use ultrasonic instruments for the bulk of the work and hand instruments for detail in harder-to-reach areas.
Polishing
After scaling, polishing removes residual soft plaque and surface stains. The traditional method uses a small rubber cup spinning at low speed with a gritty fluoride paste. A newer alternative is air polishing, which sprays a jet of fine powder, water, and compressed air across tooth surfaces. Modern air polishing powders are made from materials like erythritol or glycine, both of which dissolve in water, are gentle on tooth and root surfaces, and effectively strip away plaque biofilm. Erythritol powder also has antibacterial properties against some of the bacteria involved in gum disease.
In clinical comparisons, air polishing with erythritol achieved the same results as traditional ultrasonic cleaning plus rubber-cup polishing, but took about 25 minutes instead of 34 minutes per side. Nearly 80% of patients preferred the air polishing, reporting less discomfort.
What You Can’t Remove at Home
The critical distinction is between plaque and tartar. Plaque is soft and comes off with a toothbrush or floss. Tartar is calcified and bonded to the tooth surface at a level that no home tool can break. Products marketed as “tartar removal” toothpastes contain ingredients that slow tartar formation, but they cannot dissolve or remove tartar that has already formed.
Tartar below the gumline is especially problematic because you can’t see it, and it creates a rough surface that attracts even more bacteria. This subgingival tartar is a primary driver of gum disease progression. If your dentist finds significant buildup below the gumline, they may recommend a deeper cleaning called scaling and root planing, which involves numbing the area and carefully cleaning the root surfaces beneath the gums. This is the same basic process as a regular scaling, just more thorough and focused on the pockets between gums and teeth.
A Practical Daily Routine
Since plaque reforms within 24 hours and can start hardening within four to eight, the most effective strategy is disrupting it at least twice a day. Brush for two minutes in the morning and before bed, clean between your teeth once daily with interdental brushes or floss, and keep up with professional cleanings at whatever interval your dentist recommends, typically every six months. People prone to heavy tartar buildup or with active gum disease may benefit from cleanings every three to four months.
If you’re unsure whether you’re brushing thoroughly enough, try disclosing tablets once a week. The stained patches reveal your personal blind spots, which tend to be the same areas every time. Once you know where you consistently miss, you can adjust your technique and spend extra time in those zones.