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It seems like the ads are everywhere these days—repair your enamel and reverse tooth decay with a tube of toothpaste! Are these claims too good to be true? Let’s dive into the science of tooth decay—how decay develops and how (and if!) it can be reversed.

Teeth can stand up to the powerful pressures of biting and chewing because over 95% of our enamel is made up of minerals. Calcium and phosphate ions in our teeth bond to form a crystal structure called hydroxyapatite. Because of the strength of this crystalline design, tooth enamel is the hardest substance in our bodies, even stronger than our bones. 

But bones, like most other parts of our bodies, are living tissue, which means that they can create new cells to replace old or damaged cells. Tooth enamel can’t regenerate new cells to repair itself. This means that when a cavity has made a hole in the tooth, the enamel can’t grow back. And, while enamel structure is very strong, it’s also vulnerable to damage—specifically, damage from acids. 

Our teeth are exposed to acids throughout the day, whether they are acids created by plaque bacteria or the acidic foods and drinks we consume. Acids dissolve mineral bonds, stripping calcium and phosphate minerals from the enamel and leaving weak spots in the tooth surface. This process is called demineralization. Demineralization is the first stage of tooth decay.

The good news? Our bodies are designed with a built-in defense mechanism to prevent demineralization from causing lasting damage. All through the day, saliva helps wash away acids in the mouth and bathes our teeth with new calcium and phosphate ions. These ions bond with the calcium and phosphate in our enamel, restoring enamel strength. This protective repair process is called remineralization. 

Now for the bad news. In the tug of war between demineralization and remineralization, saliva can only do so much. If your diet is heavy with acids, if you don’t brush away acid-producing plaque bacteria regularly, if you eat a lot of the sugars and starches which feed plaque bacteria, the remineralizing effects of saliva can’t keep up with the demineralizing effects of acids.

The first visible sign of demineralization is often a white spot on the tooth where minerals have been stripped from enamel. Studies have shown that enamel-strengthening toothpaste can be effective in this very first stage of tooth decay. Toothpastes which advertise enamel repair generally contain one or more of these ingredients:

• Calcium Phosphate
• Hydroxyapatite
• Fluoride 

Toothpastes with calcium phosphate or hydroxyapatite contain calcium and phosphate minerals, the building blocks of tooth enamel. Studies have suggested that these minerals can replace the calcium and phosphate ions stripped from enamel. These toothpastes may or may not contain fluoride, which is something you should discuss with your dentist before deciding on a specific toothpaste.

Fluoride toothpastes remineralize enamel—and more! Fluoride ions are attracted to the tooth’s surface, and, when fluoride ions join with the calcium and phosphate ions there, they form fluorapatite. Fluorapatite crystals are larger, stronger, and more resistant to acids than hydroxyapatite crystals. And, once bonded with tooth enamel, fluoride attracts the calcium and phosphate ions in saliva to remineralize the teeth more quickly. 

Why consider enamel-repair toothpaste? 

Once enamel is gone, it’s gone for good. If excess demineralization isn’t treated, a weak spot on the tooth surface will continue to erode, growing bigger and deeper until it becomes a hole in the enamel. This is a cavity, and your dentist will need to treat and repair your tooth to prevent the cavity from growing and potentially exposing the tooth’s pulp to bacteria and infection. 

If you wear braces, you want to be especially careful about excess demineralization. Because it can be hard to brush and floss effectively with braces, white spots and discolored patches are a common concern for those with braces, especially on the enamel around brackets.  

Talk to Drs. Chen and Sepe at our Andover office about which toothpastes can help restore a healthy balance between the ongoing cycles of demineralization and remineralization when you have braces. While tooth-repair toothpaste can’t fix cavities, these products can often strengthen demineralized enamel and reverse this earliest stage of tooth decay.

You pay attention to what you eat. After all, your oral health depends on it. Without the necessary proteins, vitamins, and minerals in your diet, your teeth and gums will suffer. But did you know it’s a two-way street? Without healthy teeth and a healthy bite, your digestive system can suffer as well.

Because digestion doesn’t start in your stomach—it starts in your mouth! Let’s take a quick look at how the digestive system operates.

• Teeth

The first step in digesting is breaking down foods so your body can extract their nutrients more easily. Healthy teeth are essential here. Incisors and canines tear food into smaller pieces while molars grind these pieces into an easy-to-swallow, paste-like consistency. While we chew, the surface area of the food increases, allowing the digestive enzymes in saliva, the stomach, and the small intestine to work more efficiently.

• Salivary Glands

Saliva production increases when we eat. Digestive enzymes in saliva begin breaking down carbs into sugars, and separating fat molecules. Saliva also contains antimicrobial peptides which are important for oral and gut health.  

• Esophagus

This muscular tube connects the back of the throat to the stomach. As we swallow, muscles in the esophagus contract and relax, an involuntary movement called peristalsis. These contractions push food down into the stomach. Peristalsis also occurs in the stomach and intestines, efficiently moving food through the rest of the digestive system. 

• Stomach

Inside the stomach are gastric acids and enzymes which break food down further to help the small intestine make use of these nutrients in the next stage of digestion.

• Small Intestine

This organ works to reap the benefits of our healthy diets. The small intestine absorbs about 95% of the nutrients from our digested food—carbohydrates, proteins, fat, vitamins, and minerals—and transfers these nutrients to the circulatory system to be used throughout the body. Any remaining food particles travel to the colon, or large intestine.

• Large Intestine

Bacteria in the large intestine help process soluble fiber, which we can’t digest on our own. The large intestine is also where insoluble fiber and anything else undigested are converted to solid waste. 

Now, let’s look at how a malocclusion, or bad bite, can disrupt the digestive process.

In some cases, malocclusions are mild, and require little or no treatment. A more serious malocclusion, though, can impact the way the jaws fit together, making it difficult or impossible for the jaws and teeth to align correctly for efficient and comfortable chewing. What are some possible consequences?

• Uneven bite pressure

With a healthy bite, your teeth and jaws fit together properly to let you get the most out of your meal. When teeth and jaws don’t meet properly, it’s hard to chew food into the paste-like consistency necessary for rest of our system to process it smoothly.

• Reduction in digestive enzymes and peptides

Difficulty chewing means less chewing. Less chewing means less saliva, and your system won’t benefit from the digestive prep work and gut protection which saliva typically provides. 

• Uncomfortable swallowing

Insufficiently chewed food makes peristalsis in the throat and other digestive organs more difficult. Larger pieces of food can become stuck in the esophagus, causing painful swallowing or even choking.

• Higher risk of stomach problems

When food isn’t chewed thoroughly, the stomach has to work harder, and the risk of gastroesophageal reflux increases. Highly acidic gastric juices can back up into the esophagus and mouth, causing heartburn, chest pain, sore throat, and vomiting. 

• Bowel irritation

When food particles are too large, the small intestine must work harder to break them down and to absorb their nutrients. Insufficiently digested food can also upset the bacterial balance in the large intestine. These problems can cause indigestion, constipation, gas, and bloating.

• Changes in nutrition 

Orthodontic problems can also lead to nutritional imbalances even before we start to digest. Soft foods and liquids are often chosen over proteins, fruits, and vegetables when chewing pain is a regular occurrence. While a soft diet is fine for a few days if your mouth is a bit sore following an orthodontic or dental treatment, it can be difficult to get the all the nutrients your body needs when you only eat soft foods.

Orthodontic treatment has many well-known benefits. Straighter teeth. A comfortable, functional bite. Increased self-confidence. Let’s add one more benefit to that list—making sure your digestive system gets off to a great start!

The team at Chan & Chen Orthodontics in Andover recommends an orthodontic evaluation for children around the age of seven, because finding malocclusions early makes it easier to correct them. But if you’re an adult, don’t settle for painful chewing and an increased risk of digestive problems. Talk to Drs. Chen and Sepe to learn how orthodontic treatment can give you an attractive, functional smile. Your healthy smile—and your healthy body—will thank you!

A healthy smile is an important part of your overall health. As the new year begins, it’s the perfect time to set simple, achievable goals that support better oral health. Small changes to your daily habits can make a meaningful difference, not just for your smile, but for your well-being all year long.

If you struggle with keeping your new year’s resolutions or aren’t sure where to start, we have a few tips that can help you out:

• Schedule regular dental visits. Routine checkups provide accountability, reinforce good habits, and allow early intervention if problems arise.
• Start small and stay realistic. Try to start with manageable goals, like brushing twice daily for two minutes or flossing once a day, rather than trying to change everything at once.
• Build routines, not willpower. Tie oral care to existing habits such as flossing before bedtime or after a nightly skincare routine, to make consistency easier.
• Track progress, and use reminders and tools: Timers, phone reminders, or electric toothbrushes with built-in timers can help you stay on track.

We help support our patients through all their oral health goals. No matter what stage you are at, we can help provide instructions for oral hygiene and oral care, encourage you to maintain good routines, and provide feedback on your progress.

If you haven’t already set goals for this year, now is the time. There are so many benefits to setting oral health goals including:

• Better overall health: Good oral hygiene helps reduce inflammation and bacteria that are linked to systemic conditions such as heart disease, diabetes, and respiratory illness.
• Increased confidence: A healthy, comfortable smile can boost self-esteem, making you feel more confident in social and professional settings.
• Reduced pain and stress: Preventive care lowers the risk of toothaches, gum disease, and dental emergencies, which can cause both physical discomfort and anxiety.
• Improved daily comfort: Healthy teeth and gums make eating, speaking, and sleeping more comfortable and enjoyable.
• Long-term financial benefits: Preventing dental problems often means fewer extensive treatments later, reducing stress and unexpected costs.
• Positive habit building: Setting and achieving oral health goals reinforces healthy routines that support overall wellness and self-care.

If you need help achieving your 2026 oral health goals, make sure to give us a call and schedule an appointment.

Whether you’re using the latest note-taking app or old-school pen and paper, it’s a good time to start jotting down your resolutions for a healthier, happier New Year. To help the process along, we have some suggestions for traditional tooth-friendly resolutions—and also some ideas which might surprise you!

The Classics

• Brush and Floss Regularly

If you’re brushing for two minutes each time you brush, great work! Often, though, that two-minute window starts to shrink as our brushing routine becomes *too* routine. Try timing yourself while you brush normally. If you’re falling quite a bit short of two minutes, taking just a bit more time will be lots more effective in removing plaque from your teeth. And flossing is essential to remove irritating plaque and bacteria from between teeth and around the gumline.

Typically, dentists recommend brushing twice a day and flossing once daily. If the team at Chan & Chen Orthodontics recommends brushing and flossing more often to keep your brackets and wires free from food particles and built-up plaque, be sure to stick to this new schedule for a beautiful, cavity-free smile when your orthodontic treatment is complete.

• Use Fluoride Toothpaste

Fluoride toothpaste doesn’t just help prevent cavities by cleaning away plaque and food particles. It also helps make our enamel stronger. 

Acids created by plaque bacteria and acids in our diet dissolve minerals from tooth enamel, making it softer and more vulnerable to cavities. Fluoride bonds with the minerals in enamel to create an even stronger protective enamel coating. Check with your dentist or the American Dental Association’s website for the best toothpaste choices for healthy, strong enamel.

• See Your Dentist Regularly

Dentists typically recommend a full dental exam and cleaning twice each year. Your dental team will take X-rays as needed, examine your teeth, gums, and general oral health, and screen for oral cancer. A professional cleaning will remove plaque and tartar, which is especially important for gum health and for protecting the enamel near your brackets and wires, where plaque tends to build up.

Being proactive with your dental care means you’ll be sharing your healthy smile all year long—as well as discovering any potential problems before they can develop into major problems!

The Surprises

• Chew (Sugarless) Gum

When you’re not producing enough saliva, you feel the effects of dry mouth, including sore throat, difficulty swallowing, and bad breath. Another side effect? Poorer dental health. 

Saliva helps neutralize the acidic foods we eat, washes away bacteria and food particles, and contains minerals like calcium and phosphorus which remineralize tooth enamel. Chewing sugarless gum encourages saliva production. Check with Drs. Chen and Sepe to see if it’s okay to chew sugar-free gum if you wear braces, and, if you use aligners, be sure to remove them before chewing and brush before putting them on again.

• Don’t Brush Right After Eating

Brushing after a meal is great to remove food particles like sugars and carbs which stick to our teeth—and braces—and which the bacteria in plaque thrive on. But if you’ve been eating or drinking acidic foods, it’s best to wait about an hour before brushing. 

Acids in foods, like acids created by bacteria, weaken tooth enamel. Brushing right away can be abrasive and damage enamel, but if you wait for an hour, the minerals in saliva have a chance to remineralize and restore your enamel strength.

• Toss Your Toothbrush

Not that we mean give up brushing altogether! But your toothbrush bristles start to fray and fan out after several months, meaning that you won’t be getting the full cleaning effects of your great brushing technique. Put a note on your calendar to replace your brush every three to four months for the best in plaque removal.

If you’re already following all these suggestions for protecting your dental health, resolve to keep up the good work! If not, give these easy-to-follow recommendations a try. Protecting your dental health is essential to gift yourself a new year filled with happy, healthy smiles in Andover.