What Is Plaque, and How Does It Turn Into Tartar?

You may have heard your dentist talk about plaque and tartar as if they were the same thing. They are related, but they are not identical.

Plaque is a soft, sticky film that forms naturally on your teeth. Tartar, also called calculus, develops when plaque remains on the teeth and hardens.

Understanding the difference matters because plaque can usually be removed at home, while tartar cannot simply be brushed away. Once it has hardened, professional dental cleaning is needed.

The good news is that understanding how this process works can make everyday oral care much easier to understand.

What exactly is dental plaque?

Dental plaque is a sticky film that develops on the surfaces of your teeth. It contains bacteria and other material from the mouth.

Plaque forms continuously, even after you have cleaned your teeth. That is why oral hygiene is not something you do once in a while. It is an ongoing process of removing the buildup before it becomes a problem.

If plaque remains on the teeth, the bacteria within it can contribute to inflammation of the gums. This can lead to gingivitis, an early form of gum disease that commonly causes red, swollen, or bleeding gums.

Plaque can also contribute to tooth decay because bacteria in plaque can interact with sugars and produce acids that damage tooth enamel.

How does plaque become tartar?

The transformation is fairly simple.

Plaque begins as a soft film that can be removed with regular brushing and cleaning between the teeth. But if plaque is left in place, minerals from saliva can become incorporated into it.

Over time, the plaque hardens into calculus, commonly known as tartar.

Once this happens, brushing and flossing are no longer enough to remove the hardened deposit.

A dentist or dental hygienist has the instruments needed to remove tartar safely.

This is one reason that maintaining your teeth at home and having professional dental care serve different purposes. Daily cleaning helps prevent buildup, while professional cleaning can remove deposits that have already hardened.

Why is tartar harder to deal with?

Tartar is not simply a thicker layer of plaque.

Because it is hardened, it creates a rough surface where additional plaque can accumulate. This can make it more difficult to keep the area clean.

Tartar can form above the gumline, but it can also develop below it. When buildup remains around the gums, it can contribute to ongoing inflammation and make gum disease more difficult to control.

This does not mean that having some visible tartar automatically means you have serious gum disease. The condition of the gums and supporting tissues needs to be evaluated by a dental professional.

What happens to your gums when plaque builds up?

Your gums are not passive tissue surrounding your teeth. They respond to the bacteria and buildup around them.

When plaque accumulates along the gumline, the gums can become irritated and inflamed.

You may notice:

• Red or swollen gums
• Bleeding when brushing or cleaning between your teeth
• Tenderness around certain teeth
• Persistent bad breath
• Gums that appear to be pulling away from the teeth

These can be signs of gum disease and should not simply be dismissed as a normal part of having your teeth cleaned.

Early gum disease, known as gingivitis, is generally reversible with appropriate oral hygiene and professional care.

If gum disease progresses to periodontitis, however, the tissues and bone supporting the teeth can be damaged. Periodontitis is a more serious condition that requires professional treatment and cannot simply be reversed by improving brushing habits.

Why can't you just brush tartar away?

This is one of the most common points of confusion.

Brushing is excellent for removing plaque before it hardens. It is not designed to remove established tartar.

Once plaque has absorbed minerals from saliva and calcified, it becomes firmly attached to the tooth surface. NIDCR explains that calculus cannot be removed by normal brushing and flossing and needs to be removed by a dental professional.

Trying to scrape tartar off yourself with sharp objects is therefore not a good substitute for professional cleaning. It can injure the gums or damage the surfaces of the teeth.

Can everyone develop tartar?

Anyone can develop plaque, but the amount and speed at which it accumulates can vary.

Your oral hygiene habits are important, but they are not the only factor. Saliva, the shape and position of your teeth, areas that are difficult to clean, smoking, certain health conditions, and other individual factors can influence your risk of gum problems.

Some people may notice tartar building up relatively quickly, while others may have less visible accumulation.

That difference does not necessarily mean that one person is taking better care of their teeth than another.

How can you reduce plaque buildup?

The goal is not to prevent plaque from ever appearing. That would be unrealistic because plaque forms naturally.

The goal is to remove it regularly before it has time to cause problems or harden into tartar.

Brush twice a day

Regular brushing helps remove plaque from the accessible surfaces of your teeth.

Using fluoride toothpaste is also important for protecting against tooth decay. The exact brushing technique matters as well, particularly around the gumline and areas that are easy to miss.

Clean between your teeth

A toothbrush cannot effectively reach every surface between your teeth.

Floss and other interdental cleaners can help remove plaque from these harder-to-reach areas. The American Dental Association notes that interdental cleaning helps remove plaque between teeth and can reduce the likelihood of gum disease and tooth decay.

The best method can vary depending on how closely your teeth fit together and your individual dental needs.

Keep regular dental appointments

Even a careful home routine cannot remove tartar once it has formed.

Regular dental care gives a professional an opportunity to identify plaque and tartar buildup, examine your gums, and detect problems that may not be obvious to you.

How frequently you need professional care depends on your oral health and individual risk factors.

Does tartar always mean something is wrong?

Not necessarily.

Finding tartar does not automatically mean that someone has advanced gum disease or has poor oral hygiene.

Tartar simply means that some plaque has hardened. The more important question is what is happening around it.

A dentist can examine the gums and teeth to determine whether there is inflammation, gum recession, periodontal pocketing, bone loss, or another concern.

This is particularly important if you have persistent bleeding, swollen gums, loose teeth, pain when chewing, or changes in how your teeth fit together.

These can be signs of periodontal disease that deserve professional evaluation.

What about the oral bacteria themselves?

Your mouth naturally contains a large community of microorganisms. Not all bacteria in your mouth are harmful, and simply trying to eliminate every microorganism is not the goal of normal oral hygiene.

What matters is maintaining a healthy oral environment and controlling plaque buildup.

This is an important distinction because oral health is not simply about having a completely bacteria-free mouth. Instead, everyday habits help control the buildup that can contribute to tooth decay and gum inflammation.

Research into the oral microbiome continues to explore how the communities of microorganisms living in the mouth interact with oral health. However, this does not replace the basics of brushing, cleaning between the teeth, and professional dental care.

The simple takeaway

Plaque and tartar are part of the same process, but they are not the same thing.

Plaque is soft and removable. Tartar is hardened plaque that requires professional removal.

The most useful strategy is to focus on preventing plaque from staying on your teeth long enough to harden.

Brushing twice a day, cleaning between your teeth, and maintaining regular dental care can help control plaque and reduce the risk of problems involving your teeth and gums.

And if you already have visible tartar, don't assume that brushing harder will solve the problem. Once plaque has hardened, a professional cleaning is the appropriate way to remove it.

Sources

National Institute of Dental and Craniofacial Research (NIDCR), “Oral Hygiene”

NIDCR: Oral Hygiene

National Institute of Dental and Craniofacial Research (NIDCR), “Ask the Expert: Do I Really Need to Floss?”

NIDCR: Do I Really Need to Floss?

National Institute of Dental and Craniofacial Research (NIDCR), “Periodontal (Gum) Disease”

NIDCR: Periodontal (Gum) Disease

Centers for Disease Control and Prevention (CDC), “About Periodontal (Gum) Disease”

CDC: About Periodontal (Gum) Disease

American Dental Association, “Dental Floss/Interdental Cleaners”

American Dental Association: Dental Floss/Interdental Cleaners