Surgically Assisted Rapid Palatal Expansion (also called SARME or SRPE) is a well-established technique used to widen a narrow upper jaw (maxilla) in older teens and adults.

This article walks through what SARPE is, why it’s used, how it compares to other options, and what patients can expect.

What is a SARPE?

Surgically Assisted Rapid Palatal Expansion (SARPE) is a minimally invasive treatment used to widen a narrow upper jaw when growth is complete and traditional orthodontic expanders alone are no longer predictable or successful.

In children and younger teens, the upper jaw can often be widened with a traditional palate expander because the bones are flexible and the upper jaw suture is still open. As children grow, the bones of the upper jaw become more rigid, with the midline suture of the upper jaw fusing during teenage years. This means trying to expand for older teens and adults without additional assistance mainly tips teeth rather than widening the jaw.

SARPE combines a minor surgical procedure with an orthodontic expander to allow the upper jaw to widen in a controlled, healthy way.

Some people have what is called maxillary transverse deficiency —meaning the upper jaw is too narrow for the lower jaw and teeth. SARPE helps address this problem. This procedure allows for a surgical opening of the midpalatal suture, in order to widen in the upper jaw with a palatal expander.

When Is SARPE Recommended?

SARPE is typically considered when a patient is done growing and has a narrow upper jaw. Common indications include:

A posterior crossbite
5 mm or more of expansion is needed
Prior non-surgical palate expansion has failed
Traditional expansion would risk gum or bone health
Expansion is needed before another jaw surgery
There is a narrow upper jaw associated with airway concerns

Diagnosis Matters!

Diagnosing a narrow upper jaw is more complex than identifying crowding or bite issues.

A thorough evaluation may include:

Clinical exam
Measurements
Digital scans or models
X-rays
CBCT imaging

SARPE vs. MARPE

Miniscrew-Assisted Rapid Palatal Expansion (MARPE) is a treatment used to widen a narrow upper jaw without surgery by anchoring an orthodontic expander to the upper jaw using small temporary implants placed in the palate. In teens and some young adults, this added jaw support helps direct expansion forces to the upper jaw bone rather than only the teeth.

However, because bone maturity varies from person to person, MARPE is not equally predictable for all adults. For adults, SARPE is sometimes favored over MARPE or MSE because it is more predictable and more stable.

Though MARPE can have a good success rate, success significantly decreases with age—an important factor when choosing MARPE vs SARPE in adults. SARPE also tends to show larger expansion capabilities, with up to ~7 to 8 mm inter-molar expansion vs. ~5 to 6 mm for MARPE. SARPE success is considered high in adults because the procedure reduces bone resistance.

An orthodontic evaluation is important to determine whether MARPE or SARPE is more likely to be effective, reliable, and successful.

Expanders Used for SARPE

Several types of expanders can be used with the SARPE procedure. The expander used will be chosen by your orthodontist and surgeon. Common types include RPE, Hyrax, MARPE, and MSE.

The best appliance depends on:

Gum and bone health
Tooth support
Palatal anatomy
Overall treatment goals

How is a SARPE Surgery Performed?

The SARPE procedure is a planned, staged process that combines a minor surgical procedure with a palatal expander to safely widen the upper jaw. Here’s what that typically involves, step by step.

1️⃣ Pre-Surgical Planning

Before surgery, your orthodontist and oral surgeon work together to plan the expansion carefully.

This usually includes:

A clinical exam
Digital scans
CBCT imaging to evaluate bone thickness, symmetry, and areas of resistance
Selection of the expander type
Review of goals, risks, and expected outcomes

This planning phase is critical—it determines how much expansion is needed and how the surgery will be tailored to you.

2️⃣ Placement of the Palatal Expander

In most cases, the expander is placed before surgery. The expander will be serving as the device that gently opens the upper jaw after the procedure.

3️⃣ The SARPE Surgery Itself

The procedure itself is performed by an oral and maxillofacial surgeon. Typically this is done as an outpatient procedure, and most patients go home the same day.

The surgeon makes precise, conservative incisions in areas of resistance in the upper jaw. These cuts are designed to reduce resistance, not remove bone.

Common areas addressed may include:

The midpalatal suture
The side walls of the upper jaw
Areas near the cheekbone and nasal floor

Some techniques are more extensive; others are more conservative. There is no single universal technique—the approach is customized for each patient to allow safe, symmetric expansion with minimal trauma.

4️⃣ Initial Activation

In some cases, the surgeon may place a small initial turn in the expander during surgery. Other times, activation of the expander is delayed. This simply confirms the jaw is ready to widen.

5️⃣ Recovery Period

After surgery, swelling, pressure, and congestion are common. Discomfort is usually mild to moderate and manageable with medication. Most patients return to work or school within a week. Usually, there will be a period of 5 to 7 days to allow for healing before consistent expander activation begins.

6️⃣ Active Expansion

Once cleared by your surgeon or orthodontist, you (or a parent) turn and activate the expander at home. Typical activation is at a rate of 0.25–1.0 mm per day, for a period of 1–2 weeks.

During this time:

A temporary gap between the front teeth is expected
You may feel pressure or tightness
Your expansion will be monitored

7️⃣ Holding Phase

After the desired width is reached, the expander stays in place without turning. This allows new bone to fill in and stabilize. This phase commonly ranges from 4–6 months, and is essential for long-term stability.

8️⃣ Continued Orthodontic Treatment

Once the expansion and bone has stabilized:

Orthodontic treatment continues
Teeth are aligned
Spaces are closed
The bite is refined

SARPE is one phase of a comprehensive (full) orthodontic plan—not a stand-alone treatment.

SARPE Surgery

During SARPE, an oral and maxillofacial surgeon gently releases areas of bony resistance in the upper jaw, and then the orthodontic expander is slowly activated over time to create real skeletal widening. This approach makes expansion more predictable and stable, helping to correct issues like crossbites, crowding, and a narrow smile, and often improving overall bite function.

SARPE does not reposition the entire jaw. It is less extensive than full jaw (orthognathic) surgery.

While the word “surgery” can sound intimidating, SARPE is a well-established procedure that has been used safely for decades and is designed to support long-term orthodontic success rather than forcing teeth to move in unhealthy ways. For non-growing patients who need true skeletal widening, SARPE is one of the most reliable way to achieve it.

What are the Risks of SARPE?

SARPE is less extensive and less invasive than full jaw (orthognathic) surgery. While SARPE is commonly performed and generally safe, potential risks include bleeding, temporary gum irritation or recession, tooth root or periodontal issues, asymmetrical expansion, infection or sinus concerns, and appliance-related problems.

Your orthodontist and surgeon review these carefully during informed consent.

SARPE Compared to Other Expansion Options

Conventional Palate Expanders

Best for growing patients

MARPE (Miniscrew-Assisted Expansion)

Works very well for many late teens and young adults
Success depends heavily on anatomy and bone maturity
In older adults, results can be less predictable and unsuccessful

Segmental LeFort I Jaw surgery

Jaw repositioning surgery
Usually chosen when major bite or facial changes are also needed
More invasive

Bottom line:
SARPE is often chosen for mature adults, and when reliability and skeletal predictability are the priority.

How much does SARPE cost?

The cost of a SARPE (Surgically Assisted Rapid Palatal Expansion) procedure varies depending on where you live, the surgeon’s fees, hospital or surgical center costs, and whether it’s coordinated with orthodontic care. In many parts of the United States, SARPE treatment commonly ranges from approximately $8,000 to $12,000. However, this can be higher in some areas of the country or practices, and it may come with additional costs.

It’s also important to consider that costs may include more than just the surgery: diagnostic imaging (like CBCT scans), consultations, orthodontic appliance fabrication, follow-up visits, and any braces or aligner treatment.

Insurance coverage varies widely — some plans will cover part of the surgical and orthodontic fees if medically necessary, while others may require you to pay a significant portion out of pocket, so it’s always worth checking benefits and obtaining a pre-treatment estimate from your surgeon and orthodontist.

Frequently Asked Questions

Will I get a gap between my front teeth?
Yes—and that’s expected. It’s temporary and closes with orthodontic treatment.

Is SARPE considered major surgery?
It’s less extensive than full jaw surgery and often outpatient, but it is still a surgical procedure.

Does it hurt?
Most patients describe pressure rather than pain. Discomfort is usually manageable with medication.

Will it change my face or nose?
Changes are typically subtle. Some notice slight widening at the base of the nose, often considered an esthetic improvement.

Does SARPE help breathing?
It may improve nasal airflow for some patients, but this varies and is not guaranteed.

SARPE: The Big Picture

SARPE is a trusted, evidence-supported treatment for widening a narrow upper jaw in skeletally mature patients.

When planned for the right patient and combined with thoughtful orthodontic care, it offers:

Reliable skeletal widening
A healthier foundation for tooth movement
Improved bite relationships
Stability and predictability when properly managed

Schedule a Consultation

If you are curious about palatal expansion, it is best to have a consultation with an orthodontist.

SARPE and other palatal expansion procedures offer effective solutions for correcting jaw misalignments, severe crowding, and giving you the best smile and bite possible. Through a comprehensive evaluation, you can learn more about the procedure and treatment options. Visit our Board Certified Orthodontist at Godley Family Orthodontics in Zionsville, IN to learn more. Call (317) 913-2828 or schedule your consultation online here.