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Dental braces

life science Maturity 11-13 Next article →

Dental braces are orthodontic devices used to align and straighten teeth. They help position teeth correctly in relation to a person's bite. This process can improve overall dental health by correcting various issues. Common problems include overbites, underbites, and cross bites. Braces can also fix open bites, deep bites, gaps, or crooked teeth.

Orthobraces - dental braces lower upper jaw
Orthobraces - dental braces lower upper jaw

While some use braces for medical reasons, others use them for cosmetic purposes. In many first-world economies, cosmetic use is quite common.

The movement of teeth relies on constant force and pressure. This process involves four main elements: brackets, bonding material, an archwire, and ligature elastics, also called O-rings. The archwire puts pressure on the brackets, which in turn pushes the teeth. Sometimes, dentists use springs or rubber bands to apply force in specific directions. This constant pressure moves teeth into new positions over time.

Young Colombian man during an adjustment visit of his orthodontics
Young Colombian man during an adjustment visit of his orthodontics

To move a tooth, the body must undergo bone remodelling. This is a biomechanical process where bone becomes stronger or weaker based on load. Cells called osteoclasts and osteoblasts manage this change. As the tooth moves, the periodontal ligament is stretched or compressed. The body then uses bone deposition to create new bone that supports the tooth in its new location.

There are several different types of braces available today. Traditional metal braces, often called "train track braces," are made of stainless steel.

Dental braces
Dental braces

Some patients use gold-plated stainless steel if they have a nickel allergy. Titanium braces are another option because they are light and strong. Self-ligating braces are a second common type that uses a built-in system to secure the archwire. These do not require elastic ties and may reduce treatment time and pain. For those seeking a more subtle look, clear braces or lingual braces are available. Lingual braces are custom-made and bonded to the back of the teeth, making them invisible from the front.

Transparent-Bracket
Transparent-Bracket

Some people also use progressive, clear removable aligners for simpler cases.

Applying braces is a precise medical procedure. In North America, most treatment is performed by orthodontists. These are dentists who completed two to three years of additional post-doctoral training.

Braces cement placement
Braces cement placement

The process begins with a consultation and a visual inspection of the teeth. Doctors then take X-rays, moulds, and impressions to analyze the problem. Many modern clinics now use digital models created by laser-scanning dental impressions. This allows for computer-automated treatment simulations in a virtual setting. To prepare for the braces, a doctor might use orthodontic spacers to create room between the teeth. Brackets are then attached to the teeth using dental cement and cured with a light.

Treatment duration and complexity vary for every patient. Most treatments last between six months and two and a half years. In extreme cases, a patient might require orthognathic surgery. If there is not enough space in the mouth, a doctor may perform an extraction to remove a tooth. Another method is expansion, which uses a palatal expander to make the dental arch larger.

Upper and Lower Jaw Functional Expanders
Upper and Lower Jaw Functional Expanders

For children and teenagers, a headgear appliance might be used to keep teeth from moving. Patients typically visit the orthodontist every three to six weeks for adjustments. During these visits, the doctor replaces or modifies the archwire and the colorful ligatures. This frequent adjustment helps shift the teeth into the correct final position.

Once the braces are removed, the work is not yet finished. The teeth have a tendency to move back to their original positions. To prevent this, patients use retainers to keep the teeth in alignment.

Hawley retainers are a very common type of retainer. Many patients use a transparent plate for about six months after treatment. For patients who had long or difficult treatments, a fixative wire might be attached to the back of the teeth. This provides extra support to ensure the teeth stay straight. Some patients may also need a gum lift or a fiberotomy to improve the gumline before using a retainer.

Modern orthodontics continues to evolve with new technologies. Customized orthodontic systems now combine 3-D imaging with treatment planning software. Some systems even use a robot to custom-bend the archwire for the patient. Additionally, modern archwires often use nickel-titanium or temperature-sensitive materials. These wires are limp and flexible when cold, making them easy to thread through brackets. Once they reach body temperature, they stiffen and apply a constant, light force to the teeth. This combination of biology and technology allows for more efficient and comfortable results.

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🖼️ Images & Media (11)
File:Orthobraces - dental braces lower upper jaw.jpg
Orthobraces - dental braces lower upper jaw.jpg
File:Transparent-Bracket.JPG
Transparent-Bracket.JPG
File:Upper and Lower Jaw Functional Expanders.jpg
Upper and Lower Jaw Functional Expanders.jpg
File:Braces cement placement.jpg
Braces cement placement.jpg
File:Tom Cruise (47327458031).jpg
Tom Cruise (47327458031).jpg
File:Dental braces.jpg
Dental braces.jpg
File:Young Colombian man during an adjustment visit of his orthodontics.jpg
Young Colombian man during an adjustment...
File:ClockFace Retainers.jpg
ClockFace Retainers.jpg
File:Full orthodontic headgear with headcap and fitting straps.jpg
Full orthodontic headgear with headcap...
File:Old Braces at a museum in Jbeil, Lebanon.jpg
Old Braces at a museum in Jbeil, Lebanon.jpg
File:Portrait de Pierre Fauchard dans un livre ancien d'odontologie.jpg
Portrait de Pierre Fauchard dans un livre...
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