A dark line along the gums, near-black deposits between the lower teeth: black tartar worries people more than yellow tartar — and it resists everything you throw at it at home. That is normal: it is not dirt, it is coloured mineral. Here is why it darkens, why no brush will ever remove it, and what actually is in your hands.
Black tartar is tartar — plus pigments
Tartar is always born the same way: dental plaque that was not dislodged in time mineralises and hardens — the difference between plaque and tartar is explained here. Its colour, though, tells its story:
- Dark on the surface: tartar is porous, and it drinks whatever pigments pass by — tobacco, coffee, tea, red wine. In a smoker or a heavy coffee drinker, tartar that starts yellowish turns brown, then black, as it soaks them up.
- Dark below the gumline: tartar that forms under the gum edge takes its tint from blood pigments. This is usually the real "black tartar" — and it reflects a situation that has been in place for longer, which deserves an examination. It is treated the same way as the other kind, but it should not be left waiting.
Why it does not go away on its own — and why you should not scrape
Once mineralised, tartar bonds with the tooth: the brush has no grip left, and baking soda or charcoal only abrade the enamel around it without denting the deposit. As for do-it-yourself scaling kits, they stack the risks: scratching the enamel, injuring the gum, and leaving in place precisely the subgingival part — the one that matters. The only gesture that removes black tartar is professional scaling, with ultrasound, which lifts the deposit without attacking the tooth — including below the gumline.
Your real lever: keeping it from coming back
Break the plaque cycle. Today's tartar is last week's plaque. Brushing that insists along the gumline — that is where everything is decided — and daily interdental cleaning deprive tartar of its raw material. The inner faces of the lower teeth, opposite the salivary glands, deserve special attention: that is where it settles first.
Limit the soaking. A toothpaste does not dissolve tartar — none does, let us be clear. But an anti-stain formula used daily slows the deposit of the pigments that blacken it: that is the role of our Anti-Tobacco-Stains and Anti-Coffee-Stains formulas, designed for the two main pigment suppliers. The right division of labour between the tube and the dentist's chair is detailed in stain-removal toothpaste or scaling.
Capitalise on the scaling. The weeks right after a scaling are the ideal moment to install the routine that delays the next one — the after-scaling playbook is here.
Smokers: the special case that is not one
Tobacco accelerates everything: more pigments, altered saliva, gums that bleed less and mask the warning. Black tartar therefore returns faster, and the scaling rhythm is discussed with the dentist — often closer together than the classic yearly visit. The full picture of what tobacco does to teeth is in our dedicated article, and the gestures that help between scalings in this one.
Stain, tartar or cavity: don't treat the wrong problem
Three things can turn a tooth dark, and they are not treated the same way. A surface stain is smooth, spread over the visible face, and fades with regular brushing and an anti-stain formula; baking soda has its place there — what it can and cannot do — on a stain, never on tartar. Tartar feels rough under the tongue or a fingernail, sits against the gumline and between the lower teeth, and does not budge however you scrub: only the dental chair removes it. A black dot lodged in a molar groove or at the edge of a filling, on the other hand, may be a cavity starting.
The test when in doubt is simple: what does not fade after two weeks of careful brushing is not a stain. And an isolated dark spot, especially with sensitivity to sweet or cold, should be shown to the dentist without waiting for the annual check-up — a cavity caught early is treated in one visit, caught late it costs a tooth. For coffee deposits, the most common after tobacco, our page on coffee stains details what comes off at home and what needs scaling.
Your questions about black tartar
Can baking soda remove black tartar?
No. Baking soda works on soft deposits and surface stains; tartar is mineralised. Scrubbing harder only wears down the enamel and gum around it — the deposit stays.
Is black tartar more serious than yellow tartar?
It is mostly older: dark below the gumline, it signals a situation that has settled in. It is treated the same way — by scaling — but it is an appointment not to postpone, not a mere question of looks.
How often should I get a scaling?
Your dentist decides, based on how fast you build tartar: yearly is the common benchmark, often tightened to twice a year for smokers and heavy coffee or tea drinkers.
Is an "anti-tartar" toothpaste worth anything?
It slows the mineralisation of plaque and the deposit of new pigments — useful as prevention. But no toothpaste, anti-tartar or not, removes tartar that has already formed: that promise does not exist in a tube.
In short
Black tartar is tartar that has taken on colour — tobacco and coffee pigments on the surface, blood pigments below the gumline, where it marks an established situation. Mineralised, it yields only to professional scaling; scraping at home damages without solving. Your share of the work starts after the chair: plaque dislodged daily along the gumline, pigments slowed every day, and a scaling rhythm kept. Tartar will come back — your routine decides how much, and in what colour.