what toothpaste reverses cavities?

What toothpaste reverses cavities? No toothpaste can reverse cavities once a hole has formed in your tooth, but fluoride toothpaste can reverse the early stages of tooth decay before a cavity develops.

Can Any Toothpaste Actually Reverse Cavities?

Fluoride toothpaste reverses early tooth decay, not actual cavities. A cavity means a permanent hole has formed in your tooth, and no toothpaste can fill that hole back in. You need a dentist to fix a cavity with a filling. But fluoride toothpaste works on the stage before a cavity forms, called demineralisation. This is when acids start eating away at your tooth enamel, creating weak spots that can turn into cavities if left untreated. Studies show fluoride helps put minerals back into these weak spots, which stops them from becoming full cavities. Research from the Centers for Disease Control and Prevention shows that fluoride toothpaste reduces cavities by 25% in children and adults.

What Is Demineralisation and How Does It Lead to Cavities?

Demineralisation happens when acids attack your tooth enamel. These acids come from bacteria in your mouth that eat sugar and create acid as waste. The acid pulls minerals like calcium and phosphate out of your enamel, and this creates weak spots that look like white patches on your teeth. If the demineralisation continues, these weak spots turn into holes, which are cavities. This process happens every time you eat or drink something with sugar or carbs. Your saliva works to put minerals back into your enamel through a process called remineralisation, but if you eat sugary foods too often, your saliva can’t keep up.

How Does Fluoride Toothpaste Work to Stop Cavities?

Fluoride speeds up remineralisation and makes your enamel stronger. When you brush with fluoride toothpaste, the fluoride sits on your teeth and gets absorbed into the weak spots in your enamel. It combines with calcium and phosphate to create a new mineral called fluorapatite, which is stronger than the original enamel and more resistant to acid attacks. Research published in the Journal of Dental Research found that fluorapatite makes teeth 10 times more resistant to acid than regular enamel. Fluoride also slows down the bacteria in your mouth that produce acid, which means less acid attacking your teeth throughout the day.

How Much Fluoride Should Your Toothpaste Have?

Most toothpastes sold in shops contain 1000 to 1500 parts per million of fluoride, and this amount works for most people. The Australian Dental Association recommends using toothpaste with at least 1000 ppm of fluoride for adults and children over 6 years old. For children under 6, use a pea-sized amount of toothpaste with 500 to 1000 ppm of fluoride. For people at high risk of cavities, dentists can prescribe high-fluoride toothpaste with 5000 ppm, but you shouldn’t use this without talking to your dentist first. Check the back of your toothpaste tube for the fluoride content, which is usually listed as sodium fluoride, stannous fluoride, or sodium monofluorophosphate.

What Other Ingredients Help Fight Early Decay?

Calcium and phosphate combinations help rebuild enamel alongside fluoride. Some toothpastes contain calcium phosphate compounds like casein phosphopeptide-amorphous calcium phosphate, which gives your teeth extra minerals to strengthen weak spots. A 2019 study in Clinical Oral Investigations found that toothpaste with CPP-ACP increased remineralisation by 45% compared to regular fluoride toothpaste. Hydroxyapatite is another ingredient that mimics the natural mineral in your teeth and helps repair early decay. Studies from Japan show that hydroxyapatite toothpaste works as well as fluoride for preventing cavities. Xylitol, a sugar alcohol found in some toothpastes and gum, stops bacteria from sticking to your teeth and reduces acid production by up to 50%.

Can Natural or Fluoride-Free Toothpastes Reverse Early Decay?

Natural toothpastes without fluoride cannot reverse early decay as effectively as fluoride toothpaste. Some natural toothpastes contain baking soda, charcoal, or essential oils, and while these ingredients can clean your teeth and reduce bacteria, they don’t put minerals back into your enamel. A 2020 review in the International Journal of Dental Hygiene found that fluoride-free toothpastes did not prevent cavities as well as fluoride toothpastes. Charcoal toothpastes can actually harm your enamel because charcoal is abrasive and can scrape away the surface of your teeth. If you prefer natural options, look for toothpastes with hydroxyapatite or nano-hydroxyapatite, which have science backing their ability to remineralise teeth.

How Should You Brush to Get the Most Benefit from Fluoride?

Brush twice a day for two minutes each time, and don’t rinse your mouth with water after brushing. Rinsing washes away the fluoride before it can work on your teeth. Instead, spit out the excess toothpaste and leave the remaining fluoride on your teeth. The Australian Dental Association recommends waiting at least 30 minutes after brushing before eating or drinking. Use a soft-bristled toothbrush and brush in small circular motions, making sure to reach all surfaces of your teeth, including the back molars and along the gum line. Electric toothbrushes remove more plaque than manual brushes, which means less acid-producing bacteria in your mouth.

What Else Can You Do to Reverse Early Decay?

Cut back on sugar and acidic foods to give your teeth a chance to heal. Every time you eat or drink something with sugar or acid, your teeth spend the next 30 to 60 minutes in an acidic state where demineralisation happens. Limit sugary snacks and drinks to mealtimes instead of sipping or snacking throughout the day. Drink water after meals to wash away food particles and neutralise acids. Chew sugar-free gum with xylitol after eating to increase saliva flow, which helps remineralisation. Your saliva naturally contains calcium and phosphate, which repair your enamel, and chewing gum boosts saliva production by 10 times. Visit your dentist every six months for check-ups and professional fluoride treatments, which contain much higher fluoride levels than toothpaste and can reverse early decay faster.

How Long Does It Take to Reverse Early Decay?

Reversing early decay takes several weeks to months depending on how bad the damage is. Small white spots can heal in as little as 3 to 4 weeks with consistent brushing and reduced sugar intake. Larger areas of demineralisation may take 3 to 6 months to fully remineralise. A 2018 study in the Journal of Clinical Dentistry found that people who brushed with high-fluoride toothpaste twice daily saw a 35% reduction in white spot lesions after 12 weeks. Keep in mind that once a cavity has formed and a hole exists in your tooth, you must see a dentist for a filling because no amount of brushing will repair a cavity.

How Much Does Fluoride Toothpaste Cost?

Fluoride toothpaste costs between $3 and $10 AUD for a standard tube in Australia. Store brands and generic options usually cost $3 to $5, while name brands cost $5 to $10. High-fluoride prescription toothpastes cost $15 to $30 per tube, but your dentist needs to prescribe these. Specialty toothpastes with added calcium phosphate or hydroxyapatite cost $10 to $20 per tube. Most people find that regular fluoride toothpaste from the supermarket works well and provides good value.

FAQ

Can you reverse a cavity at home without going to the dentist?

No, you cannot reverse a cavity at home once a hole has formed. Only a dentist can fix a cavity by removing the decay and filling the hole. You can reverse early decay before a cavity forms by using fluoride toothpaste and cutting back on sugar.

Is fluoride safe to use every day?

Yes, fluoride is safe to use every day in toothpaste. Decades of research confirm that fluoride in toothpaste does not cause health problems when used as directed. Swallowing large amounts of toothpaste can cause stomach upset, which is why children should use only a pea-sized amount and spit it out.

Do whitening toothpastes also reverse cavities?

Whitening toothpastes can reverse early decay if they contain fluoride, but the whitening ingredients don’t help with decay. Most whitening toothpastes use abrasives or peroxide to remove surface stains, and some can be too harsh on weakened enamel. Look for whitening toothpastes that list fluoride as an ingredient.

How do you know if you have early decay or a cavity?

Early decay shows up as white or brown spots on your teeth that feel rough when you run your tongue over them. Cavities appear as brown or black spots with visible holes or pits in your tooth. You might feel pain or sensitivity with cavities, especially when eating sweet or cold foods. See your dentist for an exam to know for sure.

Does mouthwash with fluoride work as well as fluoride toothpaste?

Fluoride mouthwash helps prevent cavities but doesn’t replace toothpaste. Mouthwash reaches areas between your teeth that brushing might miss, but it doesn’t stay on your teeth as long as toothpaste does. Use fluoride mouthwash as an extra step after brushing for the best protection.

Can adults reverse cavities the same way kids can?

Adults can reverse early decay the same way children can by using fluoride toothpaste and reducing sugar. Adult teeth remineralise more slowly than children’s teeth because adult enamel is thicker and more mineralised. Adults also tend to have more gum recession, which exposes the softer root surfaces that decay faster.

What happens if you stop using fluoride toothpaste?

Stopping fluoride toothpaste increases your risk of cavities because your teeth lose the protective benefit of fluoride. Weak spots in your enamel will not remineralise as quickly, and existing early decay may get worse and turn into cavities. If you switch to fluoride-free toothpaste, make sure it contains other remineralising ingredients like hydroxyapatite.