Tartar forms when bacterial plaque on your teeth absorbs calcium and phosphate minerals from saliva and hardens into a crusty deposit that brushing alone can’t remove. The good news: since plaque takes several days to begin mineralizing, a consistent daily routine can stop tartar before it ever forms. Prevention comes down to disrupting plaque at the right time, using the right tools, and choosing products with ingredients that block the mineralization process.
How Plaque Becomes Tartar
Within the first 18 hours after cleaning, pioneer bacteria colonize your tooth surfaces and begin forming a biofilm. If that biofilm stays undisturbed, it gradually matures over the next few days. Between days four and seven, more aggressive bacteria increase along the gumline, and the environment shifts in favor of mineralization. Bacteria in the biofilm promote higher local concentrations of calcium and phosphorus, which triggers the crystallization that turns soft plaque into hard calcite deposits.
Your saliva chemistry plays a direct role in how fast this happens. People with higher salivary calcium and phosphate levels, higher saliva pH, and greater saliva flow tend to accumulate tartar faster. This is partly why some people seem to build up tartar more quickly than others despite similar brushing habits. You can’t change your saliva composition, but you can compensate by being more diligent about removing plaque within that critical window before mineralization begins.
Brush Effectively, Not Just Often
Brushing twice a day matters, but technique and tool choice matter just as much. Electric toothbrushes consistently outperform manual ones. In a 28-day comparison study, a multidirectional power toothbrush reduced plaque by about 65%, while manual brushing reduced it by only 29%. Ultrasonic models fell in between at roughly 53%. The oscillating and rotating motions of powered brushes reach angles and crevices that flat manual strokes tend to miss.
If you use a manual brush, focus on angling the bristles at 45 degrees toward the gumline and using short, gentle strokes rather than sawing back and forth. Replace your brush (or brush head) every three months, since frayed bristles lose their cleaning ability. Spending a full two minutes is the standard recommendation for a reason: most people who brush “quickly” leave significant plaque behind on back molars and along the gumline, exactly where tartar tends to build up first.
Clean Between Your Teeth Daily
Tartar commonly forms between teeth and just below the gumline, areas a toothbrush simply can’t reach. Both string floss and water flossers are effective at clearing plaque from these spots, but the evidence slightly favors water flossers for most people. A systematic review found that the majority of clinical studies showed water flossers outperformed dental floss in plaque reduction. One study measured a 74% whole-mouth plaque reduction with a water flosser compared to 58% with string floss.
The likely reason is that pressurized water can flush bacteria from deep between tight contacts in the back teeth and slightly below the gumline, areas where string floss struggles to reach. Water flossers also break up the fibrin-like mesh that bacteria use as scaffolding for plaque colonies in hard-to-access spots. That said, a few studies found no significant difference between the two methods. The best interdental cleaner is whichever one you’ll actually use every day. If string floss sits untouched in your drawer, a water flosser is a worthwhile investment.
Choose a Tartar-Control Toothpaste
Not all toothpastes are the same when it comes to tartar prevention. Tartar-control formulas contain specific ingredients that interfere with the crystallization process, essentially blocking calcium and phosphate from hardening onto your teeth even if some plaque remains.
The three main anti-tartar ingredients to look for are:
- Pyrophosphates: The most widely used tartar-control compounds. They work by directly inhibiting mineral crystal growth on tooth surfaces.
- Zinc salts (especially zinc citrate): These inhibit crystal formation and have been shown in clinical trials to significantly reduce and even prevent calculus buildup compared to regular toothpaste.
- Sodium hexametaphosphate: A type of polypyrophosphate that targets plaque calcification. Clinical studies have shown it reduces tartar by as much as 55% compared to a standard fluoride toothpaste.
Many multi-benefit toothpastes now combine several of these ingredients. You don’t need to memorize brand names. Just flip the tube over and look for pyrophosphate, zinc citrate, or sodium hexametaphosphate in the ingredient list. These products won’t remove existing tartar, but they meaningfully slow down new formation between dental cleanings.
Use Xylitol to Starve Plaque Bacteria
Xylitol is a sugar alcohol found in many sugar-free gums and mints that does more than just replace sugar. It actively disrupts the bacteria most responsible for plaque buildup. When Streptococcus mutans (the dominant plaque-forming species) tries to metabolize xylitol, it absorbs the molecule but can’t extract energy from it. The bacterium expends energy trying to process and expel the xylitol, essentially starving itself. Over time, this reduces bacterial populations on tooth surfaces and makes the remaining plaque less sticky and adhesive.
Habitual xylitol users show measurably less plaque adhesiveness and lower levels of the sticky polymers bacteria produce to cling to teeth. Chewing xylitol gum for three weeks or more leads to both short-term and long-term reductions in plaque bacteria levels. The effective dose is about 5 to 6 grams per day, spread across at least three exposures. Going above about 7 grams doesn’t provide additional benefit. That translates to roughly three to five pieces of xylitol gum throughout the day. It’s not a replacement for brushing and flossing, but it’s a simple add-on that chips away at the plaque that eventually becomes tartar.
Get Professional Cleanings on Schedule
Even with excellent home care, most people develop some tartar over time, particularly behind the lower front teeth and on the outer surfaces of upper molars (areas closest to salivary glands where mineral-rich saliva concentrates). Professional dental cleanings use ultrasonic instruments and sharp scaling tools to remove hardened deposits that no amount of brushing can touch. For most adults, cleanings every six months keep tartar from accumulating to levels that threaten gum health. If you’re a heavy tartar former, your dentist may recommend cleanings every three to four months.
Why DIY Scraping Is Risky
Dental scrapers marketed for home use might seem like a logical shortcut, but they carry real risks without professional training. The sharp metal tips that make them effective in a hygienist’s hands can scratch tooth enamel (increasing sensitivity and creating rough surfaces where plaque accumulates faster), cut or traumatize gum tissue (potentially leading to gum recession), and injure soft tissues like your cheeks and tongue. Perhaps most concerning, you can accidentally push tartar fragments beneath the gumline, where they can trigger gum abscesses or infection. Dental hygienists train extensively to identify deposits by feel and remove them without damaging surrounding tissue. This is one task worth leaving to a professional.