Night Guards

Bruxism, or the grinding of teeth, is remarkably common in children and adults. For some children, this tooth grinding is limited to daytime hours, but nighttime grinding (during sleep) is most prevalent. Bruxism can lead to a wide range of dental problems, depending on the frequency of the behavior, the intensity of the grinding, and the underlying causes of the grinding.

A wide range of psychological, physiological, and physical factors may lead children to brux. In particular, jaw misalignment (bad bite), stress, and traumatic brain injury are all thought to contribute to bruxism, although grinding can also occur as a side effect of certain medications.

What are some symptoms of bruxism?

In general, parents can usually hear intense grinding – especially when it occurs at nighttime. Subtle daytime jaw clenching and grinding, however, can be difficult to pinpoint. Oftentimes, general symptoms provide clues as to whether or not the child is bruxing, including:

Frequent complaints of headache.
Injured teeth and gums.
Loud grinding or clicking sounds.
Rhythmic tightening or clenching of the jaw muscles.
Unusual complaints about painful jaw muscles – especially in the morning.
Unusual tooth sensitivity to hot and cold foods.

How can bruxism damage my child’s teeth?

Bruxism is characterized by the grinding of the upper jaw against the lower jaw. Especially in cases where there is vigorous grinding, the child may experience moderate to severe jaw discomfort, headaches, and ear pain. Even if the child is completely unaware of nighttime bruxing (and parents are unable to hear it), the condition of the teeth provides your pediatric dentist with important clues.

First, chronic grinders usually show an excessive wear pattern on the teeth. If jaw misalignment is the cause, tooth enamel may be worn down in specific areas. In addition, children who brux are more susceptible to chipped teeth, facial pain, gum injury, and temperature sensitivity. In extreme cases, frequent, harsh grinding can lead to the early onset of temporomandibular joint disorder (TMJ).

What causes bruxism?

Bruxism can be caused by several different factors. Most commonly, “bad bite” or jaw misalignment promotes grinding. Pediatric dentists also notice that children tend to brux more frequently in response to life stressors. If the child is going through a particularly stressful exam period or is relocating to a new school for example, nighttime bruxing may either begin or intensify.

Children with certain developmental disorders and brain injuries may be at particular risk for grinding. In such cases, your pediatric dentist may suggest botulism injections to calm the facial muscles, or provide a protective nighttime mouthpiece. If the onset of bruxing is sudden, current medications need to be evaluated. Though bruxing is a rare side effect of specific medications, the medication itself may need to be switched for an alternate brand.

How is bruxism treated?

Bruxing spontaneously ceases by the age of thirteen in the majority of children. In the meantime however, your pediatric dentist will continually monitor its effect on the child’s teeth and may provide an interventional strategy.

In general, the cause of the grinding dictates the treatment approach. If the child’s teeth are badly misaligned, your pediatric dentist may take steps to correct this. Some of the available options include: altering the biting surface of teeth with crowns, and beginning occlusal treatment.

If bruxing seems to be exacerbated by stress, your pediatric dentist may recommend relaxation classes, professional therapy, or special exercises. The child’s pediatrician may also provide muscle relaxants to alleviate jaw clenching and reduce jaw spasms.

In cases where young teeth are sustaining significant damage, your pediatric dentist may suggest a specialized nighttime dental appliance such as a nighttime mouth guard. Mouth guards stop tooth surfaces from grinding against each other, and look similar to a mouthpiece a person might wear during sports. Bite splints or bite plates fulfill the same function and are almost universally successful in preventing grinding damage.

When braces are finally removed, the “retention” phase begins for most individuals. The objective of this phase is to ensure the teeth do not regress back to their previous position. A retainer will be used to maintain the improved position of the teeth. A retainer is a fixed or removable dental appliance which has been custom-made by the orthodontist to fit the teeth. Retainers are generally made from transparent plastic and thin wires to optimize the comfort of the patient.

Retainers are worn for varying amounts of time, depending on the type of orthodontic treatment and the age of the patient. Perseverance and commitment are required to make this final stage of treatment successful. If the retainer is not worn as directed, treatment can fail or take much longer than anticipated.

What types of retainers are available?

There are a variety of retainers available, each one geared towards treating a different kind of dental problem. The orthodontist will make a retainer recommendation depending on the nature of the original diagnosis and the orthodontic treatment plan.

The following are some of the most common types of retainers:

Hawley retainer – The Hawley retainer consists of a metal wire on an acrylic arch. The metal wire may be periodically adjusted by the orthodontist to ensure the teeth stay in the desired position. The acrylic arch is designed to fit comfortably on the lingual walls or palate of the mouth.
Essix – The Essix retainer is the most commonly used vacuum formed retainer (VFR). A mold is initially made of the teeth in their new alignment, and then clear PVC trays are created to fit over the arch in its entirety. VFR’s are much cheaper than many other types of retainers and also do not affect the aesthetic appearance of the smile in the same way as the Hawley retainer. The disadvantage of VFR’s is that they break and scratch more easily than other types of retainers.
Fixed retainers – A fixed retainer is somewhat similar to a lingual brace in that it is affixed to the tongue side of a few teeth. Usually, a fixed retainer is used in cases where there has been either rapid or substantial movement of the teeth. It usually consists of a single wire. The inclination of the teeth to move rapidly means they are also more likely to regress back to their previous position if a fixed retainer is not placed.

What do I need to consider when using a retainer?

There are a few basic things to consider for proper use and maintenance of your retainer.

Don’t lose the appliance – Removable retainers are very easy to lose. It is advisable to place your retainer in the case it came in while eating, drinking, and brushing. Leaving a retainer folded in a napkin at a restaurant or in a public restroom can be very costly if lost because a replacement must be created. A brightly colored case serves as a great reminder.

Don’t drink while wearing a retainer – It is tempting to drink while wearing a retainer because of the unobtrusive nature of the device. However, excess liquid trapped under the trays can vastly intensify acid exposure to teeth, increasing the probability of tooth decay.

Don’t eat while wearing a retainer – It can be difficult and awkward to eat while wearing a removable retainer and it can also damage the device. Food can get trapped around a Hawley retainer wire or underneath the palate, causing bad breath. When worn on the upper and lower arches simultaneously, VFR retainers do not allow the teeth to meet. This means that chewing is almost impossible.

Clean the retainer properly – Removable retainers can become breeding grounds for calculus and bacteria. It is essential to clean the inside and outside thoroughly as often as possible. Hawley retainers can be cleaned with a toothbrush. Because harsh bristles can damage the PVC surface of a VFR, denture cleaner or a specialized retainer cleaner is recommended for this type of device.

Wear the retainer as directed – This phase of treatment is critical. The hard work has been done; the braces are off, and now it is tempting not to wear the retainer as often as the orthodontist recommends. Retainers are needed to give the muscles, tissues, and bones time to stabilize the teeth in their new alignment. Failure to wear the retainer as directed can have regrettable consequences, such as teeth returning to their original position, added expense, and lost time.

If you have questions or concerns about bruxism, grinding teeth, or retainers, please contact our office.

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