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What’s the Function of Functional Appliances?

March 4th, 2026

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 Kanata, Ontario 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. Razavi to discover how an individualized treatment plan and a custom appliance can give your child a healthy bite and a lasting smile.

The Effects of Biting Your Nails

February 25th, 2026

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.

Dr. Razavi 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 Dr. Razavi and our team for a recommendation.

Ouch! Are You Biting Your Cheeks More Often?

February 18th, 2026

You’re biting into something delicious, and, Ouch! You bite into something you didn’t mean to—the inside of your tender cheek.

Painful moments like this happen every now and again. But if you find that more frequent cheek biting means that you’re extra-cautious when eating or speaking, if you wake up with sore cheeks in the morning, or if you catch yourself gnawing on your cheeks during the day, it’s time to see Dr. Razavi.

Causes of Cheek Biting

Many of us experience the occasional cheek chomp when we’re eating or talking. No fun! Besides the pain, a bite can cause broken skin, inflammation, a canker sore, or a cyst. Luckily, the discomfort from these accidental bites generally resolves after a few days.  

Sometimes, though, biting becomes a more frequent annoyance. Regular bites can be caused by several conditions. One of the most common?

  • Orthodontic Misalignment

If you notice that you seem to be biting your cheek a lot when eating or speaking, it could be an orthodontic problem. When your teeth or jaws don’t align properly, if your mouth is small in proportion to your teeth, or if your teeth have shifted over time, your cheeks can feel the consequences! Dr. Razavi can help you discover if a misaligned bite is the source of your biting problems.

But it’s not just orthodontic problems which can cause painful cheek bites. Other causes can include:

  • Bruxism

Bruxism is a medical term for tooth grinding. If you clench or grind your teeth as you sleep, it’s hard on your teeth and on your jaws. And for some people, that nightly gnashing causes cheek biting as well.

  • Wisdom Teeth

Most of us don’t have the room to welcome four new—and large—teeth. As the wisdom teeth come in, they can cause bites, especially if they erupt leaning outward toward your cheeks. They can also push your other teeth out of place.

Treatment Options

Why visit our Kanata, Ontario orthodontic office? A one-time bite can be extremely uncomfortable, and might lead to inflammation or a sore spot inside your mouth. Usually, these reactions fade in a short while.

But what about continuous biting? Regular biting injuries can lead to bigger problems. Tissue can get thicker or erode. Scar tissue can build up inside the mouth. Ulcers and other sores can become larger and more painful.

If you’ve been biting your cheeks more often, your orthodontist can diagnose the cause and offer you treatment options depending on the reason for this frequent biting:

  • Orthodontic Treatment

Orthodontic treatment can improve tooth and bite alignment—and can eliminate those painful cheek bites if misalignment is what’s causing them. Today’s orthodontics offers more options than ever before, for both adults and kids.

  • Traditional braces are more effective—and more subtle—than ever, with brackets which are smaller or come in clear and ceramic styles.
  • Clear aligners are a convenient, almost invisible way to treat misalignment with a series of trays which gradually improve alignment with each new set.
  • Lingual braces are attached to the back of the teeth, so there are no visible brackets and wires.
  • Functional appliances can improve and correct bite issues which braces or aligners alone can’t treat as effectively.

Whatever the reason for painful cheek biting, you deserve to eat and speak and enjoy your day without constant “Ouch!” moments affecting your comfort and health. If these moments are happening all too often, visit our Kanata, Ontario office for the answers to your biting problems.

Valentine's Day History

February 11th, 2026

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 Palladium Orthodontics 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!