Palate Expander: Types, Uses, Benefits & Risks

palate expander

What is a palate expander?

A palate expander, also known as an orthodontic expander, is a dental appliance used to widen the upper jaw (maxilla).


  1. Widens the upper jaw: The expander applies gentle pressure to the midline suture, a fibrous joint in the roof of the mouth. Hence, gradually separating the two halves of the maxilla and widening the upper jaw.
  2. Improves bite alignment: This expansion creates more space for teeth, correcting overcrowding, crossbites, and other misalignment issues.

How does a palate expander work?

It works by applying gentle pressure to the midline suture. It is bonded or cemented to the upper molars or premolars. It consists of a screw mechanism in the center of the appliance that, when turned with a key, gradually widens the two halves of the upper jaw. This creates more space for crowded teeth, corrects crossbites, and improves overall oral health and function.

Types of palate expanders

1. Rapid Maxillary Expansion (RME) appliances.

These are a type of fixed expander that applies more force for faster expansion, often used in teenagers and adults. They may require additional support from mini-implants placed in the jawbone.

2. Surgically Assisted Rapid Palatal Expander (SARPE).

This is a more invasive procedure that involves surgery to separate the upper jaw bones and then use an expander to widen them. It’s typically used for adults who have fully developed facial bones.

3. Implant-supported palatal expanders.

These use mini-implants placed in the jawbone to anchor the expander and provide more stability. They may be used for patients with weak teeth or who have previously undergone jaw surgery.

4. Hyrax expander.

The most popular fixed type, with bands cemented to the back molars and a central screw activated by the orthodontist. Ideal for rapid expansion in older children and teenagers.

5. Haas expander.

Similar to Hyrax, but with an acrylic plate covering the palate for additional stability. Useful for correcting midline shifts and tongue-thrusting habits.

6. Quad helix appliance.

Four arms connected by a central screw, primarily used for complex expansion needs and maintaining space after tooth extraction.

Also Read: Endosteal implant: What you need to know.

When is a palate expander used?

It’s a common orthodontic procedure used to correct a variety of dental issues, including:

  1. Crossbite: When the upper teeth overlap the lower teeth
  2. Overcrowded teeth: When there isn’t enough space in the jaw for all the teeth to fit properly
  3. Impacted teeth: Teeth that are unable to erupt properly due to lack of space
  4. Speech problems: Certain speech impediments can be caused by a narrow upper jaw
  5. Facial asymmetry: In some cases, a narrow upper jaw can lead to an asymmetrical appearance
  6. Narrow upper jaw: This can be caused by genetics or developmental problems.

Palatal expanders are most effective when used in children and adolescents, as the bones in their jaws are still growing and more flexible. However, they can also be used in adults in some cases.

Benefits of palate expanders

what is palate expander

It offers a range of benefits for both oral health and overall well-being, particularly in children and adolescents. Some most common benefits are:

1. Corrects crowding and misalignment.

It creates more space for teeth, removing overcrowding and misalignment issues like overlapping or crooked teeth. This improves both the aesthetics of your smile and the function of your bite.

2. Speech improvements.

Certain speech issues, like lisping, can be caused by a narrow palate affecting tongue placement. It can improve these issues by providing the tongue with more space and allowing for proper articulation.

3. Enhances breathing.

A narrow palate can sometimes obstruct nasal passages, leading to problems like mouth breathing, snoring, and even sleep apnea. Expanding the palate opens up these airways, improving sleep quality, reducing daytime fatigue, and potentially mitigating sleep apnea symptoms.

4. Improves Facial aesthetics.

Beyond the smile, expanding the palate can also subtly improve facial aesthetics. It can balance out the proportions of the face, enhancing features like the cheekbones and lips, and providing a more symmetrical appearance.

5. Non-surgical alternative.

It offers a non-surgical solution for jaw expansion compared to more invasive procedures like jaw surgery. This can be less expensive, less painful, and have a shorter recovery time.

6. Improves oral health.

By creating space for proper tooth alignment, it reduces the risk of tooth decay, gum disease, and other oral health problems associated with overcrowding.

7. Effective for younger patients.

Expanders are most effective before the midline suture in the palate fuses completely, typically around puberty. Early intervention can achieve optimal results and avoid the need for more complex treatments later.

8. Boosts confidence.

A straighter, healthier smile can significantly improve confidence and self-esteem, impacting social interactions and overall well-being.

Side effects:

The side effects of palate expanders are usually temporary and short-lived. Side effects of palate expanders may include:

  • Discomfort: Mild pain and pressure during adjustment.
  • Speech changes: Temporary speech adjustments.
  • Excessive salivation: Initial increase in salivation.
  • Difficulty eating: Temporary adjustment in chewing.
  • Temporary gap: Possible gap between the front teeth.
  • Infection or Irritation: Rare cases of minor irritation or infection.
  • Allergic reactions: Very rare allergic reactions to ingredients.

Here are some tips for coping with the side effects:

  1. Use over-the-counter pain relievers to manage discomfort.
  2. Apply a topical oral analgesic to numb sore spots.
  3. Eat soft foods and avoid chewy or crunchy foods for the first few days.
  4. Drink plenty of water to stay hydrated and help with swallowing.
  5. Practice good oral hygiene to prevent gum inflammation.
  6. Be patient and give yourself time to adjust to the expander.

Can palate expanders be effective for adults?

Yes, palate expanders can be effective for adults, even though they are most commonly used for children and adolescents. While the bones in the upper jaw become increasingly fused with age, they still retain some ability to expand in many adults.

Here’s a breakdown of the effectiveness of palatal expanders for adults:


  1. Generally successful: Studies have shown that palatal expanders can effectively widen the upper jaw in adults by 1-3 mm, which can be enough to correct overcrowding, crossbites, and other dental issues.
  2. Factors affecting success: The success rate depends on several factors, such as the age of the patient, the severity of the malocclusion, and the type of expander used.
  3. Slower expansion: Expansion in adults is typically slower than in children, often taking 6-12 months or even longer.

Can a palate expander change the shape of your face?

Yes, it can cause subtle changes to the shape of your face, particularly in the mid-face region. However, the extent and nature of these changes depend on several factors, including:

  1. Your age
  2. The type of expander used
  3. Your anatomy

Here are some of the potential facial changes that a palatal expander can cause:

  • Wider Mid-face: This is the most common change, as the expander widens the upper jaw, leading to a slightly wider appearance of the cheekbones and nose.
  • Improved Profile: In some cases, expansion can correct a recessed upper jaw, leading to a more balanced and harmonious facial profile.
  • Reduced Nasal Airflow Resistance: Widening the palatal vault can also increase the size of the nasal cavity, potentially improving airflow and reducing breathing problems.

It’s important to remember that:

  • The changes are usually subtle and gradual, happening throughout treatment (typically several months).
  • The final outcome varies from person to person.
  • Consulting with your orthodontist is crucial to understanding the potential changes for your specific case.

Cost of Palate Expanders

The cost can vary depending on several factors, including:

  1. Type of expander: Removable expanders are generally less expensive than fixed or rapid maxillary expansion (RME) appliances. Surgical procedures like SARPE are the most costly.
  2. Materials used: The materials used to make the expander, such as chrome, plastic, or titanium, can affect the cost.
  3. Treatment duration: The length of treatment also plays a role, with longer treatments typically costing more due to additional appointments and adjustments.
  4. Location and insurance coverage: Geographic location and your insurance coverage can significantly impact the final cost.

Here’s an estimate of the range you can expect:

  1. Removable expanders: $500 – $1,500
  2. Fixed expanders: $1,000 – $2,500
  3. RME appliances: $1,500 – $3,500
  4. SARPE: $5,000 – $10,000 or more

It is advised to consult your orthodontist. They can assess your individual needs and recommend the most suitable type of expander, providing a specific cost breakdown based on their fees, materials used, and expected treatment duration.

To reduce your out-of-pocket expenses, find out what your insurance plan covers for orthodontic treatment and palate expanders.

Alternatives to palate expanders

While palate expanders are highly effective, they may not be suitable for everyone. Alternatives for palate expanders include braces, Invisalign, and surgery.

The Bottom line

Palate expanders are orthodontic appliances designed to widen narrow mouths, commonly used in pediatric orthodontics. These expanders come in a variety of types, including those attached to bands on the back teeth and removable devices.

Depending on the specific expander type, patients will use a tool to make adjustments, gradually increasing the pressure. These adjustments can range from several times a week to several times a day. During the treatment period, it is advisable to stay away from hard or sticky foods that could potentially damage the appliance.

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