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What’s on Your Orthodontic Calendar?

July 30th, 2025

Did you know that there’s a World Orthodontic Health Day in May? Or that National Orthodontic Health Month takes place in October? You may not have circled these days on the calendar—in fact, this might be the first time you’ve heard about them! But celebrating these special days is just one way that orthodontists share the health benefits of orthodontic treatment with us.

That’s because orthodontic treatment is about more than creating a beautiful smile. With the help of Dr. Kathleen Chan and Dr. Ivy Chen, you might also be creating:

  • Healthier Teeth and Gums

When your teeth are aligned, it’s easier to prevent tooth decay and gum disease. Crowded, crooked, or overlapping teeth make it harder to brush and floss as effectively. Plaque that builds up in those hard-to-reach places on the tooth enamel helps create cavities. And over time, built-up plaque turns into tartar, a leading cause of receding gums and gum disease. Straight, properly spaced teeth make efficient brushing and flossing a breeze!

  • A Comfortable, Functional Bite

A malocclusion, or bad bite, occurs when the teeth and jaws don’t align properly. In a healthy bite, teeth aren’t crowded, twisted, or spaced too widely apart. The top teeth should slightly overlap the lower teeth. And the ridges of your upper molars should fit smoothly with the grooves of the lower molars.

If your bite is off, you’ve probably noticed chewing pain, headaches, or jaw pain. Over time, malocclusions can lead to worn enamel, cracked teeth, and tooth grinding, and have been linked to mouth breathing, which dries out the mouth and isn’t good for your dental health. Braces or aligners, with other appliances if needed, can not only correct a malocclusion, but prevent the very uncomfortable side effects of a bad bite.

  • Improved Facial Symmetry

Malocclusions affect facial symmetry. Underbites occur when the lower jaw is too large, while small lower jaws can cause serious overbites. Bite problems can mean overjets (also called “buck teeth”), or open bites (where the front teeth don’t touch when the mouth is closed). Crossbites result in one or more upper teeth fitting inside the lower teeth. These conditions can affect both facial balance and profile.

With the use of braces and appliances like palatal expanders, Herbst® appliances, or headgear, Dr. Kathleen Chan and Dr. Ivy Chen can guide jawbone development while a child’s bones are still growing. For older patients, we can design a treatment plan to align teeth, correct malocclusion, and improve facial symmetry.

  • Psychological Benefits

We can’t forget the invisible benefit of orthodontic treatment: a happy, comfortable smile is a great confidence-booster! If you’re reluctant to share your smile with the world, a visit to Dr. Kathleen Chan and Dr. Ivy Chen can let you know just what to expect from treatment, and just how it can improve your life.

Because it’s so important to both our dental health and our overall well-being, we’re happy to celebrate orthodontic health on special days throughout the year. And let’s also celebrate the fact that there’s no calendar deadline when it comes to scheduling a healthier smile! Whether it’s early treatment for younger children to guide jaw growth, or the common orthodontic treatment window during the teen years, or adult treatment to create the smile you’ve always wanted, help is available at our Andover office whenever you’re ready to set the date!

Interproximal Cavities: The Inside Story

July 23rd, 2025

Time to brush! So, you make sure you gently brush the plaque off the outside surfaces of your teeth. You want to present a gleaming smile to the world, after all. And you make sure to brush the inside surfaces as well, because who wants to feel a fuzzy patch of plaque every time their tongue hits their teeth? And, naturally, you remember to clean the tops of your molars, because those crevices make them more cavity-prone than any other surface.

Done? Not quite!

You might be surprised to learn that no matter how well you’ve brushed all the visible surfaces of your teeth, you’ve left quite a bit of enamel untouched—the adjoining, or touching, surfaces of the teeth that sit next to each other.

You’ve probably noticed that your bristles can’t . . . quite . . . reach all the enamel between your teeth (especially between your molars!) when you’re brushing. This means that food particles and plaque have an easier time sticking around. And when the bacteria in plaque are left undisturbed, especially with a banquet of food particles available, they produce acids which gradually eat away at the enamel covering our teeth, creating a cavity.

Here’s where we work in some specific dental vocabulary. “Interproximal” means between the adjoining, or touching, surfaces of the teeth. And an interproximal cavity is a cavity that develops on one of those side surfaces of your teeth.

  • Preventing Interproximal Cavities

Fortunately, prevention is about as basic as it can be—brushing and flossing effectively. Dentists recommend brushing for two minutes at least twice a day and flossing once each day. While most of us are good about keeping up with brushing, sometimes that daily flossing is more a goal than a reality.

But it’s flossing which really does the trick when it comes to interproximal cleaning. If you floss correctly, food particles and plaque are removed from between the teeth and around the gum line—places where bristles just can’t reach.

When you wear braces, though, flossing isn’t quite so basic. Getting that floss just where it needs to be in between brackets and wires and in between teeth can be a challenge!

The good news is there are many products designed just to make flossing easier while you’re in orthodontic treatment:

  • Floss threaders are flexible hoops that help you thread floss behind your wires easily.
  • Precut floss strands use a stiff tip at one end for threading floss through wires.
  • Interproximal brushes are tiny, cone-shaped brushes which can fit between your teeth and braces for precise cleaning.
  • Water flossers eliminate floss altogether, using a pulsing stream of water to clean between and around teeth and braces.

During your next visit to our Andover office, Dr. Kathleen Chan and Dr. Ivy Chen can give you tips on how to use any of these tools effectively for cleaner teeth and cleaner braces.

Preventing cavities on the exterior surfaces of your teeth is probably pretty much automatic by now, but don’t forget the potential for stealth decay! If we find signs of erosion on the sides of your teeth, or if your hygienist lets you know that you’ve got a lot of interproximal plaque buildup, work with your dental team to make sure “interproximal cavity” doesn’t become a working part of your dental vocabulary.

Misconceptions About Orthodontics

July 16th, 2025

While everyone understands that a dentist takes care of teeth, not everyone is aware of what an orthodontist does. This confusion sometimes leads to misunderstandings about what Chan & Chen Orthodontics does for our patients and how exactly Dr. Kathleen Chan and Dr. Ivy Chen can help them. Let’s take a closer look at a couple of the myths and misconceptions about orthodontists.

Perhaps the biggest misconception about the orthodontist is that they’re just like your family dentist. The truth is, they’re actually very different. While it’s true that both orthodontists and dentists care about helping you enjoy a lifetime of good dental and oral health, orthodontists go about achieving this goal in different ways. For instance, if you need to have a cavity filled, you probably won’t make an appointment to see an orthodontist. Dentists are the health professionals to see if you’re concerned about a cavity or need a filling. A dentist can also treat gum disease, tooth decay, toothaches, and other common oral health problems.

People see an orthodontist for very particular services. Most of the patients we see on a daily basis are here because they have braces, or they need to be fitted with braces or another form of tooth-straightening device. In other words, they consult an orthodontist when they are concerned about the alignment of their teeth. As a child grows up, his or her teeth may come in crooked. This can happen for a number of reasons, so it’s important for an orthodontist to take a look at a child’s teeth at about seven years of age. At that age, it’s possible to detect any problems that have not become too advanced to treat easily. Your family dentist may also refer your child to an orthodontist once the adult teeth have fully grown in.

Another common misconception about orthodontists is that they only treat children. It’s true that when you visit an orthodontic clinic you’re apt to see a lot of young kids, but you’ll also see teenagers, college students, and adults. Because crooked teeth can be caused by a number of different factors, it’s entirely possible for someone to require orthodontic treatment at any age.

If you want to know more about the practice of orthodontics or what your orthodontist can do for you, then simply ask Dr. Kathleen Chan and Dr. Ivy Chen. It’s best to get answers to your specific questions directly from the person who will be treating you. While you’re sure to find Internet resources helpful, there really is no substitute for the personal attention you’ll get during your appointment at our Andover office.

Five Clues That It’s Time to Replace Your Toothbrush

July 9th, 2025

Your dashboard lights up when your car needs an oil change. Your family smoke detector beeps when you need to switch out the batteries. But when it’s time to replace your toothbrush, you’re on your own. Luckily, there are several not-too-subtle clues that you should be shopping for a new model.

  • Fraying

Is your toothbrush looking a bit scruffy? Do those once orderly bristles look like they have the toothbrush equivalent of bed head? Have some bristles vanished altogether? Time to retire that toothbrush. Once the bristles are frayed, you just can’t reach plaque as effectively, especially where it likes to hide between the teeth.

Are you prematurely fraying? You could be brushing too hard. Overbrushing can injure delicate gum tissue, cause wear and tear to tooth enamel, and even damage your braces. If you find your brush fraying after only a few weeks of use, you might be using too much force. Remember, plaque is a sticky film, but it’s a soft sticky film. Ask us for advice on just how hard you need—or don’t need—to brush.

  • Odor

This one really goes without saying—no one wants an aromatic toothbrush! How to make sure your toothbrush is fresh and clean?

Always rinse carefully after you brush. This will get rid of any toothpaste, bits of food, or other particles left on your brush.

Let your toothbrush air dry. It might seem more hygienic to keep your brush covered in a bathroom setting, but a closed, moist container is a perfect breeding ground for germs. Don’t let them make a home in your bristles!

  • Illness

A cold or a bacterial infection (like strep throat) is no fun. But now that you’re feeling better, it might be time to throw out your toothbrush. The chances of re-infection are very low, unless your immune system is compromised, but this is a perfect opportunity to replace your brush with a fresh, germ-free model.

And if you share your toothbrush, or if you store it right next to a family member’s (which you really shouldn’t do, for this very reason), germs get shared, too. Quarantine your brush while you’re ill, and replace it once you’re out and about.

  • Discomfort

Bigger isn’t necessarily better. A brush with a head that’s too big won’t allow you to get into those small spaces in your mouth where plaque likes to collect. And when you are trying to clean around brackets and wires, a regular brush might be a problem. Ask Dr. Kathleen Chan and Dr. Ivy Chen for suggestions for the best tools for clean and comfortable brushing.

Also, harder doesn’t mean more effective. A brush with hard bristles can cause damage to your gums and enamel. We almost always recommend soft-bristled brushes for this every reason.

There are so many styles of brush out there, you’re bound to find the perfect fit with a little trial and error. Or ask us for suggestions the next time you’re at our Andover office for an adjustment!

  • You’ve Passed the “Best By” Date

Because of its durable construction, your toothbrush can last a long, long time. But no matter how comfortable and effective your toothbrush is right now, it was never meant to go through life with you. Bristles break down over a period of a few months, and just don’t clean as effectively. Your brush should be changed every three months, and this includes changing the head on your electric toothbrush. And because you wear braces, you’re brushing more often, so that three month lifespan might be stretching it.

Unfortunately, you don’t have a flashing light or annoying beep to remind you when it’s time to change brushes, so you’ll have to devise your own reminders. Reminder apps, calendar notes, the first day of a new season—use whatever works best for you. 

Don’t ignore the clues your toothbrush is leaving you. Replacing your brush whenever it’s necessary helps guarantee that the time you spend cleaning your teeth and gums will lead to confident, healthy smiles. Case closed!

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