Underbite: Causes, Symptoms, And Treatments

When the lower jaw extends over the upper jaw, it is said to have an underbite, or Class III malocclusion. When the mouth is closed, the lower front teeth will be in front of the upper front teeth.

In addition to creating pain and discomfort in the jaw and teeth, underbites can also cause issues with chewing, speaking, and facial appearance.

People can take proactive measures to prevent or manage underbites and preserve good oral health by being aware of its causes and available treatments.

Causes Of Underbite

A kind of malocclusion known as an underbite happens when the lower jaw extends past the upper jaw. The size difference between the upper and lower jaws, which results in the teeth being out of alignment, is the typical cause of this disorder.

Underbite has a number of frequent causes, including:

  1. Genetics: A kid may inherit the disorder from one or both parents if it is inherited.
  2. Thumb sucking: Long-term thumb sucking or dummy use can cause the jaws and teeth to become misaligned.
  3. Tongue thrusting: An underbite can result from incorrect tongue posture when swallowing or speaking.
  4. Injury to the jaw: Trauma to the jaw can cause the lower jaw to protrude, leading to an underbite.
  5. Tooth growth anomaly: An anomaly in tooth growth can cause an underbite.
  6. Inadequate dental care: Underbites can be caused by poor orthodontic care or early tooth loss.

To choose the most effective treatments, it is critical to discover the underlying causes of underbite.

Symptoms Of Underbite

The severity of the disease may affect how severe a person’s underbite symptoms are from person to person.

Underbite’s typical signs and symptoms include:

  1. Lower jaw that protrudes: The lower jaw may protrude and look more prominent than the upper jaw.
  2. Difficulty biting and chewing: Biting and chewing food can be challenging and uncomfortable when teeth are out of alignment.
  3. Speech issues: It may result in lisping or trouble pronouncing particular words, among other speech issues.
  4. TMJ disorder: An underbite can also result in the jaw being out of alignment, which can cause TMJ disorder. Jaw pain, popping or clicking sounds made when opening and closing the mouth, and headaches are all signs of TMJ condition.
  5. Self-esteem issues: An underbite can lower a person’s self-esteem and diminish their social confidence in some people.

If you experience any of these symptoms, it is also important to see a dentist or orthodontist for an evaluation.

Diagnosis Of Underbite

A dentist or orthodontist will often perform a physical examination to diagnose an underbite. To assess the severity of the underbites, the healthcare professional will examine the patient’s teeth and jaw and may also order X-rays or other imaging studies.

To rule out any underlying diseases that might be causing the underbites, they may also interrogate the patient about their symptoms and medical background. The doctor will suggest a suitable treatment strategy based on the underbite’s severity and the patient’s general health.


The severity of the ailment and the patient’s age affect the available treatments. Early orthodontic treatment for youngsters can assist direct the growth and development of the jaw to address the underbite.

Adults may benefit from wearing braces or clear aligners to straighten their teeth and enhance their bite. Surgery may be required in extreme situations to realign the jawbone.

Other treatments can involve wearing a chin cap to promote the development of the lower jaw or a reverse-pull face mask to promote the upward development of the upper jaw.

To get the best outcomes, a mix of these therapies may sometimes be suggested. It’s crucial to examine your alternatives for treatment with an orthodontist who specialises in correcting underbites.

Prevention Of Oral Health 

The prevention and treatment of underbite depend heavily on maintaining proper dental hygiene. It is advised to floss every day, use an antiseptic mouthwash frequently, and brush your teeth twice a day with fluoride toothpaste. Gum disease and tooth decay can both be avoided by avoiding meals and beverages that are high in sugar and acid.

It’s crucial to address any habits, like thumb sucking or tongue thrusting, that could cause underbites in addition to maintaining good oral hygiene. In some circumstances, orthodontic treatment may be advised to stop the onset of an underbite or to remedy an already present one. This might involve orthodontic devices like braces.

Regular dental exams are also necessary to identify underbites and other tooth issues early on. You may avoid or manage underbites and keep a healthy, radiant smile by practising good dental hygiene habits and getting the right treatment.

Related Article: https://infosclub.com/oral-care/small-cavities/

Invisalign and underbites

A good treatment option for minor to moderate underbites is Invisalign. When the bottom teeth stick out further than the upper teeth, the lower jaw juts forward and is said to have an underbite.

A series of individually created, removable aligners called Invisalign are used to progressively move the teeth into their appropriate places.

Here’s how Invisalign can help with underbites:

  1. Alignment: Invisalign aligners gently shift the teeth into alignment by applying small, controlled stresses. This can lessen the severity of the underbite by addressing the mismatch between the upper and lower teeth.
  2. Bite correction: In addition to straightening teeth, Invisalign can aid in correcting the bite. The upper and lower arches’ bite relationship will be improved as a result of the aligners’ gradual positioning of the teeth and jaws.
  3. Aesthetics: A discrete substitute for traditional braces to treat underbites, Invisalign aligners are translucent and nearly invisible when worn. This may be especially tempting to people who want a discrete orthodontic treatment option.

It’s crucial to remember that the suitability of Invisalign for correcting an underbite relies on how severe the underbite is. Traditional braces or other orthodontic procedures may be required in some cases of more severe underbites.

It is best to speak with an orthodontist if you are thinking about using Invisalign to treat your underbite. They can examine your particular situation. Gauge how severe your underbite is, and decide whether Invisalign is the best course of action for you.

To correct your underbite, they will create a customised treatment plan and walk you through the entire procedure.

Braces and underbites

Underbites can often be successfully treated with braces. When the bottom teeth stick out further than the upper teeth, the lower jaw juts forward and is said to have an underbite. In order to move the teeth and jaws into their right locations, braces progressively apply pressure to them.

Here’s how braces can help with underbites:

  1. Alignment: Braces are bonded to the teeth and include brackets, wires, and other orthodontic components. To gradually realign the teeth, regulated stresses are applied to the wires on a regular basis. This lessens the severity of the underbite by addressing the mismatch between the upper and lower teeth.
  2. Bite correction: In addition to straightening teeth, braces can assist in correcting the bite. Braces can direct the growth and development of the jaws, putting them into a more harmonic position by applying pressure to the teeth and jaws. The upper and lower arches’ biting connection is improved as a result.
  3. Treatment customization: Every underbite is different, and the treatment strategy for braces is individualised to meet the needs of each patient. Orthodontists carefully assess the severity of the underbite and create a treatment plan that may include various braces, including clear aligners, ceramic braces, and classic metal braces. They also take into account any extra orthodontic devices that could be required to adequately treat the underbite.

Surgery and Underbites

In some cases, surgery may be recommended as a treatment option for underbites that cannot be corrected through orthodontic treatment alone. Underbite surgery, also known as orthognathic surgery, involves repositioning the jaws to improve the alignment of the teeth and the overall bite.

Here are some key points about surgery for underbites:

  1. Evaluation and planning: An oral and maxillofacial surgeon does a thorough evaluation before considering surgery. To assess the severity of the underbite and choose the best course of action for treatment, this evaluation also involves taking precise X-rays, pictures, and impressions of the teeth and jaws.
  2. Orthodontic preparation: Most patients receive orthodontic treatment for a time before surgery. This entails utilising braces or other orthodontic devices to move the teeth into the best alignment possible in order to lay a solid basis for surgical repair.
  3. Surgical procedure: Under general anaesthesia, underbite surgery is normally carried out at a hospital or surgical facility. To reach the jawbones during the treatment, the surgeon creates small incisions inside the mouth. Then, they move the jaws into their new places by cutting the bones and usually using plates, screws, or wires to hold them in place. Dissolvable sutures are used to seal the cuts.
  4. Recovery and post-operative care: After underbite surgery, patients can anticipate some swelling, bruising, and discomfort. Recovery and post-operative care. During the first stage of recuperation, doctors typically recommend pain medication and a soft-food diet. It’s crucial to adhere to the post-operative instructions given by the surgeon, including dietary restrictions and oral hygiene guidelines. To track the healing process and make any required adjustments, routine follow-up visits will be planned..

Children and underbites

Underbites can also occur in children, and it’s important to address them early to ensure proper development of the jaws and teeth.

Here are some key points to consider regarding underbites in children:

  1. Early evaluation: Around the age of 7, it is advised to have a child examined by an orthodontist or a paediatric dentist. This makes it possible to identify underbites and other orthodontic problems early on. Early assessment aids in determining whether assistance is required and, if so, what the best course of action would be.
  2. Orthodontic therapy: Orthodontic therapy is frequently effective in treating children’s underbites. In order to gradually realign the teeth and jaws. The therapy may involve the use of braces or other orthodontic tools. The specific treatment strategy will determined by the degree of the underbite and the unique requirements of the child.
  3. Functional appliances: In some instances, children with underbites may benefit from functional equipment in addition to braces. These devices aid in modifying the jaws’ growth and positioning so that they guided into a more advantageous alignment. To maximise a child’s potential for growth, functional appliances frequently employed on growing kids.
  4. Early intervention: Treating underbites in children requires prompt action. Early intervention may help to direct the growth and development of the jaws, reducing the need for more intrusive treatments like surgery in the future.
  5. Compliance and follow-up: Compliance with the recommended treatment plan, including wearing orthodontic appliances as directed and attending scheduled follow-up sessions, is essential for the successful treatment of underbites in children. Parents must make sure their children practise proper oral hygiene and adhere to any dietary restrictions or other instructions given by the orthodontist.
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