Herbst Appliance

Overview

A Herbst appliance is a type of fixed brace used by an orthodontist — a dentist who specialises in straightening teeth and correcting bites. Unlike a removable brace, it is fitted by the orthodontist and stays in the mouth all the time for several months. It works by gently holding the lower jaw forward, so the upper front teeth and the lower teeth sit in a better position relative to each other. It is most often used for children and teenagers whose upper teeth stick out a lot (dentists call this an 'overjet') or whose lower jaw sits further back than it should.

Yes. The Herbst appliance is a well-established and widely used orthodontic device. It has been used for many decades and is one of the standard ways of correcting a large overjet in growing children.

It is mostly used for children and teenagers between about 10 and 14 years old, when the jaws are still growing and treatment works best. Occasionally it is used in older teenagers or adults, usually as part of a wider plan that may include other braces or, in some cases, jaw surgery later on.

Symptoms

Common symptoms

• Soreness or tenderness in the teeth and jaw for a few days after it is fitted and after each adjustment
• Teeth feeling slightly loose — this is normal and expected as teeth move
• Difficulty biting through foods or chewing tough foods at first
• A slightly different sound to speech for the first days or weeks, such as a lisp
• Redness, rubbing or small sores on the inside of the cheeks and lips
• More saliva than usual in the first week or two
• Small gaps opening up between teeth as they shift
• A clicking or moving feeling at the sides of the jaw when opening the mouth widely
• A feeling of pressure on the back teeth where the appliance is attached

Symptoms in children

• Being fussy about food or refusing crunchy foods for the first few days
• Waking at night in the first week because of pressure or discomfort
• Being more quiet or less willing to talk at school while speech settles
• Chewing on the cheek or lip because of the new metal parts
• Needing help with cleaning around the appliance at first
• Feeling self-conscious in photos or in front of friends

Symptoms in older adults

• More tenderness and a longer settling-in period, because adult teeth move more slowly
• Jaw ache or tiredness in the chewing muscles, especially in the first weeks
• The lower jaw cannot grow in adults, so the correction relies on tooth movement rather than jaw growth
• A higher chance of gum tenderness, so extra care with cleaning is needed

Causes

Main causes

• A mismatch in size between the upper and lower jaws, often inherited from parents
• Upper front teeth that sit too far forward, creating a large overjet
• A lower jaw that is set further back than the upper jaw
• Long-term thumb sucking or dummy use in early childhood, which can push front teeth forward
• Early loss of baby teeth, which can let other teeth drift out of position
• Habits such as mouth breathing, which can affect how the jaws and teeth develop
• Crowding or extra teeth that change the way the bite closes

Risk factors

• A family history of a protruding bite, overbite or jaw size differences
• Thumb sucking or dummy use that continues past about age 3 to 4
• Losing baby teeth early through decay or injury
• Mouth breathing because of large tonsils or allergies
• Not having a dental check-up during the growing years, so a bite problem is picked up later

When to see a doctor

See a doctor urgently if:

• The appliance breaks, comes loose, or a part is sticking into the cheek or gum
• Your child cannot eat or drink because of pain
• There is bleeding from the gums that does not stop with gentle pressure
• A tooth is knocked out or badly loosened
• Swelling, fever or a bad taste that suggests infection

Book a routine appointment if:

• Your child's upper teeth stick out and they are being teased or are self-conscious
• Your child has difficulty closing their lips over their front teeth
• Your child's bite seems uneven, or they chew only on one side
• Your dentist mentions that an orthodontic assessment may be helpful
• Your child is around 9 to 11 years old and has not yet had an orthodontic check
• A part of the appliance feels rough or is starting to rub, but is not causing a sore

Diagnosis

An orthodontist makes the diagnosis by examining your child's teeth, bite and jaw position, and by looking at how the face and profile are growing. They will ask about habits such as thumb sucking, about any family history of bite problems, and about teasing or confidence issues. They then explain whether a Herbst appliance is suitable, what it involves, and what the alternatives are.

Tests that may be done

• A clinical examination of the teeth, gums and bite
• Photographs of the face and teeth, taken before, during and after treatment
• Impressions (moulds) of the teeth, or a digital scan of the mouth, so the appliance can be made to fit exactly
• Dental X-rays to check the roots of the teeth and the growth of the jaws
• Sometimes a special side-view X-ray of the head (a cephalometric X-ray) to measure jaw position
• A check of the health of the teeth and gums, and treatment of any decay before fitting

What to expect at your appointment

The first appointment is a talk-and-look visit and does not hurt. If you decide to go ahead, a later fitting appointment takes longer — often an hour or more — because the bands or caps are glued to the back teeth and the arms are adjusted to fit. Your child may need separators (tiny rubber rings) a week before, to make room between the back teeth. Expect appointments every 6 to 8 weeks for checks and adjustments.

Treatment

The Herbst appliance is itself the treatment. It is fitted by an orthodontist, worn full time for around 9 to 12 months, and then removed. After it comes off, most children need a second stage of treatment — usually fixed braces on the upper teeth — to line up the teeth properly, followed by a retainer to keep the new position. The aim is to reduce the overjet, improve the bite, and make the teeth easier to clean and less at risk of injury.

Self-care at home

• Clean carefully around the appliance at least twice a day with a small-headed brush, and use interdental brushes or floss threaders to reach under the arms and bands
• Use orthodontic wax on any part that rubs, and ask your orthodontist for more when you run low
• Choose softer foods for the first few days and cut food into small pieces
• Avoid hard, sticky or chewy foods such as toffee, hard sweets, popcorn, nuts and crusty bread, which can break the appliance
• Avoid chewing on pens, pencils, nails or ice
• Rinse with warm salt water if the cheeks or gums are sore — ask your pharmacist or orthodontic team for advice on suitable pain relief for your child's age
• Wear a mouthguard for sports — ask your orthodontist which type is suitable, as a normal gum shield may not fit over the appliance
• Keep up regular dental check-ups and cleanings while the appliance is in place
• Attend every adjustment appointment, even if everything feels fine

Medical treatments

Treatment is carried out by an orthodontic team rather than with medicines. The orthodontist glues bands or small caps to the back teeth, fits the arms that link the upper and lower jaws, and adjusts them at each visit to keep the lower jaw gently guided forward. They will check the health of the gums and teeth, give advice on cleaning and diet, and repair or replace anything that breaks. Some children need a short course of treatment for gum inflammation if plaque builds up around the bands. Any pain or discomfort is managed with simple measures suggested by your pharmacist or orthodontic team, always suitable for your child's age.

When is surgery considered?

Surgery is not needed for most children who have a Herbst appliance. It may be discussed in a small number of cases where the difference between the upper and lower jaws is very large, where growth has finished and the jaw position cannot be corrected with braces alone, or where an adult is having treatment. In those situations the orthodontist would refer to a specialist jaw (maxillofacial) team to talk through the options.

Living with this condition

Life with a Herbst appliance soon becomes routine. The main day-to-day jobs are keeping it clean, avoiding foods that could break it, and going to adjustment appointments. Many children find the first week the hardest and then adapt well. It helps to warn teachers and sports coaches that your child is wearing a fixed brace, and to pack a small kit with a toothbrush, orthodontic wax and a soft snack in the school bag.

Lifestyle tips

• Keep a small 'brace kit' with a brush, wax, a mirror and a soft snack
• Tell school staff and any sports coach about the appliance
• Take a break from contact sports or wear a suitable mouthguard as advised
• Keep up normal activities — the appliance should not stop your child swimming, running or playing most sports
• Plan softer meals for the day after each adjustment appointment
• Photograph the appliance occasionally so you can show your orthodontist any changes

Diet and exercise

No food is banned forever, but some foods need care. Cut apples, carrots and crusty bread into small pieces and chew with the back teeth. Avoid sticky sweets, toffee, chewing gum, popcorn, nuts and hard crusts, which can pull off a band or bend an arm. Choose softer protein foods such as eggs, fish, yoghurt, soft pasta and well-cooked vegetables in the first days after fitting or adjustment. Drink water rather than sugary drinks to protect the teeth, especially since cleaning around the appliance is harder. Exercise is fine — just protect the mouth during contact sports, and avoid activities where there is a high chance of a blow to the face until you have checked with your orthodontist.

Mental health and emotional wellbeing

A fixed appliance is visible, and some children and teenagers feel self-conscious, embarrassed or frustrated about it, especially in the first weeks. Speech changes and eating restrictions can add to that. These feelings usually fade as life returns to normal. If your child seems very low, is avoiding school, friends or photos, or is being teased, talk to your orthodontic team, your GP or your child's school. If you or your child ever feel unable to cope or have thoughts of harming yourselves, contact your local emergency number or a local crisis support service straight away — help is available and you deserve it.

Prevention

Not every bite problem can be prevented, because jaw size and shape are largely inherited. But some things help. Avoiding long-term thumb sucking and dummy use after about age 3 to 4 gives the teeth a better chance to grow into place, and treating tooth decay early means baby teeth stay in until they are ready to fall out. Regular dental check-ups mean a bite problem is spotted while the jaws are still growing, when treatment is often simpler.

Screening programmes

Routine dental check-ups are the main way a bite problem is picked up. Many orthodontic services suggest a first orthodontic assessment for children around 9 to 11 years old, while the adult teeth are coming through and growth is still happening. In the UK, NHS orthodontic assessment is available, and treatment is usually free for children who meet the clinical criteria — ask your dentist or local orthodontic service for details.

Complications

If left untreated

• A large overjet can make the upper front teeth more likely to be chipped or knocked out in a fall or during sport
• Front teeth that stick out can be harder to keep clean, raising the risk of decay and gum problems
• Uneven chewing can cause jaw ache, headaches or unusual wear on the teeth over time
• Speech and lip-closing can be affected in some children
• Teasing and feeling self-conscious about appearance can affect confidence and wellbeing

Long-term outlook

The outlook is very good. The Herbst appliance is a well-tested way of reducing a large overjet, and most children who wear one see a clear improvement in their bite and smile. Most treatment lasts under a year, and after a second stage of braces and a retainer, results are usually long-lasting. Some children need a little more treatment later, but this is common and easy to plan for. Your orthodontic team will tell you what to expect at each stage.

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