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Toothbrush Science

August 28th, 2025

Let’s talk science! From the vastness of the cosmos to sub-atomic particles, science helps us understand the world around us and how it works. So, let’s take some familiar scientific fields of study and apply them to your toothbrush.

My toothbrush?

Yes, indeed! When it comes to your oral health, your toothbrush is the first line of defense, so understanding how and why it works so well might help us use this handy tool even more effectively.

Biology—the study of living organisms

Unfortunately for your toothbrush, the living organisms we’re talking about here are the bacteria which cause tooth decay and those which can lead to illness. How do these problems arise, and how do we prevent them?

Fight Plaque

Plaque is the sticky film that builds up on teeth, and millions of oral bacteria help make up this biofilm. These bacteria convert sugars and other carbohydrates in the foods we eat into acids. And these acids erode our tooth enamel, leading to tooth decay. (More on this when we get to Chemistry.) The best ways to get rid of plaque?

  • Brush often. The recommended minimum is two minutes of brushing twice a day, but when you’re having orthodontic work done, it’s even more important to banish the plaque that can stick to your braces or inside aligners. Ask us what brushing schedule is best for you.
  • Try an electric toothbrush. For some people with braces, cleaning the teeth is easier and more thorough with an electric brush.
  • Replace your brush regularly. Brushes become worn and frayed after three or four months, and you won’t be brushing as effectively.

Stop Germs from Spreading

  • Don’t share. Sharing toothbrushes can lead to an increased risk of colds and infections.
  • Rinse thoroughly after brushing, making sure you remove any toothpaste or debris left after you brush.
  • Store the brush upright and let it air-dry. Covering the brush or keeping it in a closed container can promote the growth of bacteria more easily.
  • Keep different brushes separate when they’re drying to avoid cross-contamination.
  • Replace your brush regularly!

Chemistry—the study of what makes up substances, their properties, and how they interact

When it comes to improving your brushing chemistry, the best thing you can do for your toothbrush is to put a dab of fluoride toothpaste on it! Why fluoride? Let’s look at the chemistry of tooth enamel.

Tooth enamel is the strongest substance in our bodies—even stronger than bone. But it is not indestructible, and acidic substances can dissolve the mineral bonds which give our enamel its strength, whether they come from the bacteria in plaque or are found in our favorite foods and drinks (sodas, coffee, tomatoes, and citrus are among the tasty, but acidic, culprits).

The enamel in our teeth contains calcium and phosphate ions, minerals which help make it the strongest substance in our bodies. But when the level of acidity in our mouths becomes too high, these minerals begin to dissolve. Eventually, teeth become pitted, bacteria can penetrate more deeply, and decay is the result.

So what can we do? While our saliva helps neutralize acidity naturally, and we can cut back on acidic foods in our diets, using fluoride toothpaste actually helps restore the strength of our enamel in a process known as “remineralization.”

Fluoride works on the surface of enamel to both attract and anchor calcium ions, reducing mineral loss and strengthening the weakened enamel. Fluoride also interacts with the calcium and phosphate compound to create a new compound that is even stronger and more acid-resistant.

When you brush with fluoride toothpaste, you help replace and restore the mineral composition of your enamel—and there’s evidence that fluoride might even interfere with oral bacteria’s ability to produce acid. Now that’s good chemistry!

Physics—the study of matter and energy and their interactions

The matter here is your tooth enamel, and the energy is the force you use when brushing. And this is one time the force should not be with you.

  • Over-vigorous brushing can not only damage your brackets, but can also irritate delicate gum tissue and wear down enamel. A “sawing” back-and-forth motion is both hard on your enamel and misses plaque and debris between the teeth. We’ll be happy to show you the safest and most effective way to brush with braces. Just remember, “Massage, don’t scrub.”
  • A soft toothbrush is almost always your best option when you use a manual brush, but if you’re still a heavy-handed brusher, or have sensitive teeth and gums, consider an electric model. An electric toothbrush should provide a continuous brushing motion without needing any heavy pressure from the brusher. Some models will even let you know when you are brushing too hard.

Brushing harder is not brushing better, and your teeth, gums, and braces will be heathier with careful brushing habits. If you need tips on brushing with braces, contact our Chestnut Hill, Massachusetts office and ask!

There’s a lot of science in the simple act of brushing, but we don’t need to spend hours studying to get a passing grade in dental health. The things you do normally—brushing at least two minutes twice a day, using fluoride toothpaste, and applying proper brushing technique—will help create a smile which will earn you top marks from Drs. Cartsos and Zavras for a lifetime!

The Effects of Biting Your Nails

August 21st, 2025

Also known as onchophagia, the habit of nail biting is one of the so-called “nervous habits” that can be triggered by stress, excitement, or boredom. Approximately half of all kids between the ages of ten and 18 have been nail biters at one time or another. Experts say that about 30 percent of children and 15 percent of adults are nail biters, however most people stop chewing their nails by the time they turn 30.

Here are four dental and general reasons to stop biting your nails:

1. It’s unsanitary: Your nails harbor bacteria and germs, and are almost twice as dirty as fingers. What’s more, swallowing dirty nails can lead to stomach problems.

2. It wears down your teeth: Gnawing your nails can put added stress on your pearly whites, which can lead to crooked teeth.

3. It can delay your orthodontic treatment: For those of our patients wearing braces, nail biting puts additional pressure on teeth and weakens roots.

4. It can cost you, literally: It has been estimated that up to $4,000 in extra dental bills can build up over a lifetime.

Drs. Cartsos and Zavras and our team recommend the following to kick your nail biting habit:

  • Keep your nails trimmed short; you’ll have less of a nail to bite.
  • Coat your nails with a bitter-tasting nail polish.
  • Ask us about obtaining a mouthguard, which can help prevent nail biting.
  • Put a rubber band around your wrist and snap it whenever you get the urge to gnaw on your nails.
  • Think about when and why you chew your nails. Whether you are nervous or just bored, understanding the triggers can help you find a solution and stop the habit.
  • If you can’t stop, behavioral therapy may be an effective option to stop nail biting. Ask Drs. Cartsos and Zavras and our team for a recommendation.

Why it’s Important to Leave Us Reviews

August 13th, 2025

At our office, Drs. Cartsos and Zavras and our team do all that we can to make sure that your experience with us is the best it can possibly be. However, there’s an important role you play in this as well: leaving us reviews and feedback.

Whether there is something you’d like us to improve upon, or you’d just like to express your thanks for a job well done, your feedback is essential to our practice’s success.

We look forward to hearing from you, and are excited to hear what you thought of your most recent visit at our Chestnut Hill, Massachusetts office.

Whitening Teeth with Braces

August 6th, 2025

Now that you are working hard to improve your dental health and appearance with your braces, it might seem like a logical time to whiten your teeth as well. But should you go ahead with home kits or a professional whitening? The answer might be yes, but not quite yet!

Toothpaste

The easiest way to whiten teeth is regular use of a whitening toothpaste. But these do not make a major difference in tooth color and may also contain abrasives which can damage ceramic brackets and make them more likely to stain. And, whether you have metal or ceramic braces, the brackets used are bonded to your teeth. Any part of your tooth covered by a bracket will not be affected by the whitening paste. Ask our office if you are thinking of using one of these products. We will be happy to recommend the best toothpastes to use while your braces are in place.

Whitening Strips and Trays

Whiteners can be applied at home with strips or tray kits. Strips are coated with a whitening gel and then pressed around your teeth. Tray kits provide a mouthguard-like appliance, which is filled with whitening gel. But neither strips nor tray solutions will whiten any area covered by brackets. When your braces come off, there might be noticeable differences in color on each tooth. Strips are difficult to apply with braces, and trays need to be custom-designed to fit your braces and make sure they don’t disturb your orthodontic work. One size most definitely does not fit all! Finally, these whitening agents can cause tooth and gum sensitivity, especially around the time of adjustments. Many manufacturers do not recommend using their products while you have braces. Please talk to us if you are thinking of using them.

Professional Whitening

A dental professional can whiten your teeth in office for the best possible results. The most effective treatments for your unique teeth are combined with protective care of your gums and mouth. Whether this treatment is appropriate while you have braces is something we are happy to discuss.

The best way to keep your teeth bright is to keep up your regular dental routine! Brushing and flossing are more important than ever now, because plaque builds up around brackets. Avoid foods that stain teeth and rinse or brush after every meal and snack. Drs. Cartsos and Zavras will show you the best way to take care of your teeth while your braces are on—and that includes the best way to keep them white and bright. Talk to us about the perfect time to whiten your beautiful smile during your next visit to our Chestnut Hill, Massachusetts office. And if you have to wait a few extra days for the smile you’ve been working toward, truly, the wait will be worth it!

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