Our Blog

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 Andover 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. Kathleen Chan and Dr. Ivy Chen to discover how an individualized treatment plan and a custom appliance can give your child a healthy bite and a lasting smile.

So, you just got your braces on, and you're wondering why you should continue visiting your general dentist since you’re seeing Dr. Kathleen Chan and Dr. Ivy Chen every other month. Patients always ask us if they should continue to see their dentist while in orthodontic treatment. In short, the answer is yes.

Today, we thought we would share a few reasons why it’s crucial to keep up with your regular visits with your dentist in addition to coming in for your regular adjustments at Chan & Chen Orthodontics.

One of the best reasons to visit your dentist while you undergo orthodontic treatment is to remove plaque and tartar. Having braces provides additional nooks and crannies in which food particles and bacteria can hide. Eventually, plaque and tartar can form around your brackets, bands or other appliances which can lead to cavities. Having your teeth professionally cleaned can help ensure most, if not all, plaque and tartar is removed. Even if you are undergoing clear aligner treatment, dental checkups and cleanings are equally as important.

The next reason to visit a dentist is to help protect your teeth from decalcification, or the loss of calcium in your teeth. A potentially serious condition in which white spots on your tooth surfaces, decalcification is irreversible and if left untreated, can lead to cavities. Decalcification is preventable; patients who cut down on sugary sweets and acidic foods, practice good oral hygiene, and visit their dentist regularly can help prevent decalcification.

The final reason we recommend visiting your dentist while you have braces is this: cavities can prolong your treatment. If you are interested in completing your orthodontic treatment on time and without any delays, visiting your dentist every six months or as recommended can go a long way toward making that a realistic goal. Your dentist can provide fluoride treatments or other treatments that strengthen your teeth and protect them from cavities.

Making sure to visit your dentist will help ensure your teeth look their best once your braces come off. If you do not have a general dentist and would like a recommendation on finding one in the Andover area, please give us a call or let us know at your next adjustment appointment!

Taking control of your oral health habits is an important New Year's resolution. To achieve perfect oral health, we recommend brushing your teeth three times a day for two minutes each time and flossing daily. This will ensure your teeth and gums are healthy.  Remember to use a soft bristle toothbrush in a circular motion. Using a water flosser is better than not flossing at all.  These devices can help clean food that gets stuck around braces and in between teeth.

Speaking of optimal oral health, did you know that January 25th is National Fluoride Day? Fluoride is an important mineral that strengthens tooth enamel and can help prevent cavities and decalcification marks around braces. Our practice offers prescription Prevident toothpaste by Colgate, which contains extra fluoride to protect your teeth. 

If you’re looking to schedule an appointment, give us a call today, we hope to see you soon! Happy New Year!

The average age of individuals who get braces is between nine and 14, although it is appropriate for younger children to visit Chan & Chen Orthodontics for a consultation with Dr. Kathleen Chan and Dr. Ivy Chen. While parents may be concerned about the efficacy of early orthodontics, research suggests that early intervention can prevent greater dental health problems later in life.

What types of conditions require early intervention?

According to the American Association of Orthodontists, 3.7 million children under the age of 17 receive orthodontic treatment each year. Early intervention may be appropriate for younger children with crooked teeth, jaw misalignment, and other common issues. Early orthodontic treatment may be of use for several types of problems:

• Class I malocclusion. This condition is very common. It features crooked teeth or those that protrude at abnormal angles. In general, early treatment for Class I malocclusion occurs in two phases, each two years long.
• Class III malocclusion. Known as an underbite, in which the lower jaw is too big or the upper jaw too small, Class III malocclusion requires early intervention. Because treatment involves changing growth patterns, starting as early as age seven is a smart choice for this dental problem.
• Crossbite. Crossbite occurs when the upper and lower jaws are not properly aligned. An orthodontic device called a palatal expander widens the upper jaw, allowing teeth to align properly. Research suggests that early treatment may be beneficial in crossbite cases, especially when the jaw must shift laterally to correct the problem.
• Tooth extraction. That mouthful of crooked baby teeth can cause problems when your child’s permanent teeth erupt. For kids with especially full mouths, extracting baby teeth and even permanent premolars can help adult teeth grow in straight.

Considerations when thinking about early intervention

Early intervention isn’t helpful for all conditions. For example, research suggests that there is little benefit to early orthodontics for Class II malocclusion (commonly known as an overbite). Instead, your child should wait until adolescence to begin treatment. Scheduling a visit to our Andover office when your child is around age seven is a smart way to create an individualized treatment plan that addresses unique orthodontic needs.