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Orthodontics

Treatments & Procedures

Malocclusion refers to crooked, misaligned teeth and a fault in the relation between the bottom and top set of teeth (the two dental arches). This may develop because of injury to the teeth or facial bones, frequent thumb sucking, or for reasons unknown.

Thumb sucking (or finger sucking) can result in localized deformation of the teeth and supporting bone. In order to restore a natural improvement, the thumb sucking habit has to be stopped. Severe malocclusion may affect eating, speech and keeping the teeth clean.

People may require orthodontic treatment for different problems:

PROTRUDING FRONT TEETH

Treatment not only improves the patient's appearance, but also protects the teeth from damage; people with protruding front teeth are more likely to injure them in sports, falling down, etc.

CROWDING

If the patient's jaw is narrow, there may not be enough space for all the teeth. In such cases the orthodontist may have to remove one or more teeth to make room for the others.

IMPACTED TEETH

As the adult teeth come through, they are not in the right position

ASYMMETRICAL TEETH

The upper and lower teeth do not match, especially when the mouth is closed but the teeth are showing.

DEEP BITE (OVERBITE)

When the teeth are clenched, the upper ones come down over the lower ones too much

REVERSE BITE

When the teeth are clenched, the upper teeth bite inside the lower ones

OPEN BITE

When the teeth are clenched, there is an opening between the upper and lower teeth.

UNDERBITE

The upper teeth are too far back, or the lower teeth a too far forward ("bulldog" appearance)

CROSSBITE

At least one of the upper teeth does not come down slightly in from of the lower teeth when the teeth are clenched; they are too near the cheek or the tongue

SPACING

There are gaps or spaces between the teeth, either because a tooth is missing, or the teeth simply do not fill-up the mouth (opposite of crowding) Treatment will not usually commence until the child is about 12 or 13 years old; when the adult teeth have come through and developed fully. In some cases treatment may start a couple of years later if teeth problems had not become noticeable beforehand. Children with a cleft lip and palate may require orthodontic treatment before their adult teeth have developed completely.

Good oral hygiene is essential before any orthodontic work can begin. When devices are placed on the teeth, bits of food are much more likely to become stuck; the patient will need to brush much more carefully and more often to prevent tooth decay while treatment is ongoing.

The orthodontist will assess the state of the patient's teeth and make a prediction on how they are likely to develop without treatment. The following diagnostic procedures will be performed: a full medical and dental health history, a clinical examination, x-rays of the teeth and jaw as well as plaster models of the teeth. After the assessment is done, the orthodontist will decide on a treatment plan.

There are two types of orthodontic appliances: fixed and removable ones.

Fixed appliancesare the most common devices used in orthodontics. They are used when precision is important. Although the patient can eat normally with fixed appliances, some foods and drinks need to be avoided, such as carbonated drinks, hard sweets, or toffee. People who participate in contact sports need to tell their orthodontist, so that special gum shields can be made.

Examples of fixed appliances include:

BRACES

Consisting of brackets and/or wires and bands. Bands are fixed firmly around the teeth and serve as anchors for the appliance, while brackets are usually connected to the front of the teeth. Wires in the shape of an arch pass through the brackets and are fixed to the bands. As the arch wire is tightened, tension is applied to the teeth, which over time moves them into proper position. A patient sees the orthodontist once a month so that the braces can be adjusted. The treatment course may last from several months to a number of years. Children tend to prefer the colored braces, while adults usually go for the clear styles.

FIXED SPACE MAINTAINERS

If the child loses a milk tooth, a space maintainer will stop the two teeth at either side of the spaces from moving into it until the adult tooth comes through. A band is fixed to one of the teeth next to the space, and a wire goes from the band to the other tooth.

SPECIAL FIXED APPLIANCES:

These may be recommended to control tongue thrusting or thumb sucking. Patients may find them uncomfortable, especially when they are eating. Experts say they should only be used if they are really necessary.

REMOVABLE APPLIANCES:

These are typically used for treating minor problems, such as preventing thumb sucking or correcting slightly crooked teeth. They should only be taken out when cleaning, eating or flossing. Sometimes, the orthodontist may advice the patient to remove them during certain activities, such as playing a wind instrument or cycling. Examples of removable appliances include:

ALIGNERS:

An option instead of traditional braces for adult patients. They are virtually unnoticeable by other people and can be taken out when patients brush their teeth, floss, or eat.

HEADGEAR:

There is a strap around the back of the head, which is attached to a metal wire in the front, or face bow. The aim is to slow down upper jaw growth, and keeping the back teeth in position while the front ones are pulled back.

LIP AND CHEEK BUMPERS:

Specially made to relieve the pressure of cheeks or lips on the teeth.

PALATAL EXPANDER:

An appliance designed to make the arch of the upper jaw wider. The device consists of a plastic plate that is placed in the palate (the roof of the mouth). The plate has screws which exert pressure on the joints in the bones, forcing them outward, thus expanding the size of the palatal area (roof of mouth area).

REMOVABLE RETAINERS:

These are placed on the roof of the mouth. They are designed to stop the teeth from moving back to their original positions. If modified, they may also be used to stop children from sucking their thumbs.

REMOVABLE SPACE MAINTAINERS:

An alternative to fixed space maintainers.

SPLINTS (JAW REPOSITIONING APPLIANCES):

They are placed either in the top or lower jaw and help the jaw close properly. Splints are commonly used for TMJ (temporomandibular joint disorder) syndrome.

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