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What’s the Function of Functional Appliances?

March 5th, 2025

Whenever we bite down, we’re applying force with our jaw muscles. Functional appliances direct these forces to create healthier tooth and jaw alignment. They’re used to help correct bite problems and to encourage symmetrical jaw growth.

Functional appliances aren’t always necessary. Because every child’s teeth and bite are different, orthodontic treatment at our Langley office is carefully tailored to your child’s individual needs.

  • For the child with minor tooth misalignment, traditional braces or aligners might be all that’s needed.
  • For the child with a minor malocclusion, or bite problem, an orthodontist might use elastics (rubber bands) to bring teeth into healthy alignment.
  • For the child who has a more serious malocclusion, involving both tooth and jaw alignment, an orthodontist might recommend a functional appliance.

A severe Class II malocclusion can be caused when the upper jaw or teeth are positioned too far forward, and/or the lower jaw is too small or positioned too far back. Common Class II malocclusions include:

  • Open bite—the front teeth don’t touch when the back teeth bite down, or the back teeth don’t touch when the front teeth close.
  • Overbite—some overbite is normal. A deep overbite occurs when the upper teeth significantly overlap the lower teeth.
  • Overjet—the upper front teeth protrude further horizontally than they should.

Today’s functional appliances come in a variety of designs to treat Class II malocclusions. They can be fixed or removable. They can be used with or without braces. Some are designed to expand the upper palate to make sure there’s room for all the permanent teeth. What they all do is advance the position of the lower teeth and jaw to create a healthier, more comfortable bite.

Fixed devices are attached to the teeth and meant to be used full-time. These include the Forsus™ device, the Herbst® appliance, and the MARA appliance.

  • Forsus Device

This appliance works with braces. A spring coil rod is most often attached to bands on the first molars on the upper jaw. It’s then connected to the arch wire on the lower jaw. Just like elastics—but more effective!—these spring coil rods provide gentle forward pressure that encourages the lower jaw and teeth forward.  

  • Herbst Appliance

The Herbst appliance also applies forward pressure to the lower jaw using telescoping rods connecting the upper and lower teeth. The rods expand as the mouth opens, and telescope together as it closes, positioning the lower jaw further forward while the upper jaw is held back. The Herbst can be worn alone or with braces, and can also be used to expand the upper palate.

  • MARA Appliance

The MARA (Mandibular Anterior Repositioning Appliance) uses an adjustable “elbow” piece connecting bands on upper and lower molars to guide the lower jaw and teeth forward when the jaw closes.

Removable appliances such as Bionator and Twin Block appliances can also improve Class II malocclusions. They are meant to be worn for a specific number of hours each day, and can be taken out for sports or other activities as needed. Because it’s essential to get all the necessary hours in, removable appliances require commitment!

  • Bionators

A bionator is made of wire and acrylic, and it looks a lot like a retainer. The wire fits around the upper front teeth. It’s attached to a smooth piece of acrylic that sits behind the upper teeth and is shaped to guide the lower jaw forward when biting down. The bionator can also be adjusted to expand the upper palate.

  • Twin Block Appliance

The twin block appliance uses two separate pieces made of wire and smooth acrylic. Both pieces are modeled to fit precisely over the upper and lower arches. The acrylic “blocks” fit over the biting surfaces of the teeth, working together like a 3D puzzle. When your child bites down, the upper blocks slide into place behind the lower blocks, pushing the lower jaw and teeth forward. The top plate can also be adjusted to expand the upper palate if needed.

Because these appliances are best used while a child’s bones are still growing and developing, dentists and orthodontists recommend an orthodontic evaluation by age seven. Early treatment with a functional appliance can help correct serious bite problems before or together with braces. In some cases, functional appliances may reduce the need for headgear or surgery.

Todays’ orthodontic technology has made functional appliances more comfortable and efficient than ever before. Talk to Dr. Cronin to discover how an individualized treatment plan and a custom appliance can give your child a healthy bite and a lasting smile.

Top Five Best Foods for Oral Health

February 26th, 2025

Some foods are just terrible for your teeth — think cookies and candy bars — but there are certain foods that are beneficial to your oral health. Below, Dr. Cronin and our team have covered five of the top foods to keep your teeth and gums healthy!

1. Crispy, low-acid fruits and vegetables: Fruits like apples and vegetables such as carrots and celery act like “natural toothbrushes,” helping to clear plaque from your teeth and freshen your breath.

2. Kiwis: These little green superstars are packed with vitamin C which is essential for gum health. The collagen in your gums is strengthened when you consume foods that are high in vitamin C, like kiwis, thus helping to prevent periodontal problems.

3. Raw onions: Onions have long been studied for their antimicrobial, antibacterial, and antioxidant properties. Proliferation of bacteria is what leads to tooth decay and cavities. By including raw onions in your diet, you'll be doing your part to wipe out those little microbes before they can multiply!

4. Shiitake Mushrooms: A specific compound in shiitake mushrooms, lentinan, has been shown to have antibacterial properties that target the microbes that cause cavities while leaving other beneficial bacteria alone. It may also help prevent gingivitis, or inflammation of the gums.

5. Green Tea: Often lauded for its high antioxidant content and many health benefits, it turns out green tea also benefits your oral health! A Japanese study found men who drank green tea on a regular basis had a lower occurrence of periodontal disease compared to men who drank green tea infrequently. It's believed this is due to the catechins in green tea, a type of flavonoid that may help protect you from free radical damage, but more research needs to be done. Either way, drink up for your overall health, as well as your teeth!

If you have any questions about your oral health, or are looking for even more oral health tips, contact our Langley office!

Planning Your Vegetarian Diet with Your Oral Health in Mind

February 19th, 2025

If you’ve been following a vegetarian or vegan diet, you know that there’s much more to living a healthy life than simply avoiding meat products. Making sure your diet includes enough protein, as well as any nutrients that are primarily available in animal products, takes planning, and there’s no one-menu-fits-all solution.

Why? Because there’s no one menu that will suit all vegetarians. Specific vegetarian diets can allow for many different options:

  • Vegan—a plant-based diet which excludes meat, fish, dairy, and egg products
  • Ovo-vegetarian—includes eggs as a dietary option, but no dairy
  • Lacto-vegetarian— includes dairy as a dietary option, but no eggs
  • Lacto-ovo-vegetarian—a meat-free diet which allows both dairy products and eggs

If you are a pescatarian, who eats fish on occasion, or a flexitarian, who sometimes includes meat in a meal, your menu options are even broader.

So let’s look at the big picture—a healthy vegetarian diet is really more concerned with the foods you do eat for nutrition rather than the foods you don’t. You can create a meal plan rich in all your essential nutrients with a little research, no matter which type of vegetarian diet is your go-to choice.

And while you’re constructing your ideal menu guidelines, don’t forget about your dental nutrition!

In terms of keeping your teeth and gums their healthiest, what important vitamins and minerals are often missing from vegetarian and vegan diets? Let’s look at three of them.

  • Calcium

Calcium is essential for maintaining strong bones and tooth enamel. Without enough calcium, a weakened jawbone leads to loose, and even lost, teeth. The acids in our food and the acids created by oral bacteria also weaken the minerals in enamel, including calcium. These weak spots can eventually become cavities. A diet rich in calcium not only supports the bones holding our teeth, but can even help repair, or remineralize, enamel which has been weakened by acidic erosion.

For vegetarians who include dairy in their diets, dairy products are a great way to include calcium. Milk, cheese, and yogurt are traditional and rich sources of this mineral.

For vegans, it’s a bit more challenging, but still doable! Non-dairy foods providing calcium include dark green vegetables (kale, broccoli, spinach), certain types of tofu, and fortified cereals, juices, and non-dairy milks.

  • Vitamin D

Now you’re ready to put that calcium to work by making sure you have enough vitamin D in your diet. Vitamin D not only helps keep our bones healthy, it also enables our bodies to absorb calcium. Bonus—it’s been linked to better gum health in several studies.

So how to get more vitamin D? If you eat dairy, most dairy products have been fortified with vitamin D. If eggs are a part of your diet, egg yolks are a great source. Pescatarians can enjoy the benefits of vitamin D from fatty fish such as tuna and salmon.

Because we get most of our vitamin D from sun exposure or foods derived from animals, plant-based foods are not a practical way to obtain the vitamin D you need. But, just as non-vegetarians can get plentiful vitamin D from fortified dairy products, vegans also have options. Try adding cereals, juices, and non-dairy milks fortified with this essential nutrient to your diet, or take a vegan vitamin D supplement.

  • Vitamin B12

Vitamin B12 is essential for healthy red blood cells, nerve cell development, brain function, and DNA production. (This is why it’s especially important for pregnant and nursing women.) Vitamin B12 can also impact your oral health. A B12 deficiency can cause a swollen, sore, or inflamed tongue, loss of taste, and gum, tongue, and mouth ulcers.

Unfortunately, vitamin B12 is reliably found only in animal foods and nutritional yeasts. If you would prefer an egg-free and dairy-free diet, look to B12 supplements or B12-fortified cereals, plant-based milks, energy bars, and other vegan options. This is a good subject to discuss with your physician, because even supplements and fortified foods might not provide enough B12.

In fact, Dr. Cronin can be vital resources when you’re planning your healthiest vegetarian diet. The next time you visit our Langley office, ask for recommendations for supplements if you’re concerned that diet alone can’t provide for all of your nutrition essentials. Finally, care should be taken to ensure that, even with supplements, you get the proper amount of the vitamins and minerals you need.

As a vegetarian, you are used to the concept of care. Whether it was concern for nutrition, the planet, the animal world, or another reason that drew you to a vegetarian diet, be sure to care for your body as well as your dietary choices. Careful planning can ensure a diet which supports not only your general health, but your oral health, for a lifetime of nourishing—and well-nourished—smiles.

Valentine's Day History

February 12th, 2025

Valentine’s Day is best known as a celebration of love in all its forms. Pink hearts, red roses, and cute greeting cards adorn every surface you see. What many people don’t realize is that the modern Valentine’s Day celebration arose from a religious holiday.

St. Valentine’s Day was originally celebrated as a religious feast day in honor of early Christian martyrs. Three martyrs named Valentine were honored: a priest in Rome, the persecuted bishop of Interamna (a town in central Italy), and a saint martyred in Africa. This saint’s day was celebrated throughout Christendom, although it was removed from the Roman Catholic Calendar of Saints in 1969.

The origin of Valentine’s Day as a holiday for lovers began with Geoffrey Chaucer in his 1382 poem “Parlement of Foules.” Chaucer wrote, “For this was on Saint Valentine’s Day, when every bird cometh there to choose his mate,” and the modern romantic holiday was born. William Shakespeare and other writers mentioned Valentine’s Day as a day of love.

Valentine’s Day as we know it came about in the early 19th century. In Victorian England, printers began manufacturing small numbers of cards with romantic verses, lace, ribbons, and other frills. Anonymous Valentine’s Day card were a popular way for young lovers to exchange romantic sentiments in an otherwise prudish time. As the 19th century progressed, printers began mass manufacturing Valentine’s Day cards. People in the United States give an estimated 190 million valentines every year, and up to one billion if you count children exchanging cards at school! With the rise of the Internet, Valentine’s Day e-cards have become a popular mode of communication, with millions of e-cards sent each year.

The other items associated with Valentine’s Day include chocolate and flowers. The tradition of giving chocolates has been around for decades, and Richard Cadbury created the first box of Valentine’s Day chocolates nearly 150 years ago. Today, purchases of chocolate total over $1 billion in the United States alone, with 35 million heart-shaped boxes sold each year. Loved ones also exchange flowers, with red roses being associated with Aphrodite, the Greek goddess of love. On Valentine’s Day itself, florists sell nearly 200 million stems of roses.

Although many people dismiss Valentine’s Day as a commercialized “Hallmark holiday,” it is beloved to couples and romantics across the United States and other countries. The team at Cronin Ortho wants to remind all patients that no matter what your celebratory plans, February 14th can be a wonderful day to celebrate the loved ones in your life. Happy Valentine’s Day!