Correcting a Narrow Upper Jaw
Surgically Assisted Rapid Palatal Expansion (SARPE) is a specialist procedure used to widen a narrow upper jaw (maxilla) in skeletally mature patients. By increasing the width of the upper jaw, SARPE can create space for crowded teeth, correct crossbites, and improve the relationship between the upper and lower jaws.
Dr Tom Pepper is a Consultant Oral and Maxillofacial Surgeon in London specialising in orthognathic surgery, facial skeletal surgery, and multidisciplinary treatment planning.
Consultations are available in London at Harley Street and Cromwell Hospital.
Why Expansion May Be Needed
A narrow upper jaw can lead to a range of functional and structural issues, including:
- Dental crowding
- Crossbite
- Imbalance between upper and lower jaws
- Difficulty achieving stable orthodontic alignment
In adults, the upper jaw is no longer flexible enough to expand with orthodontics alone, which is why surgical assistance may be required.
What Is SARPE?
SARPE is a surgical procedure designed to widen the upper jaw when conventional orthodontic expansion is no longer possible.
In childhood, the two halves of the upper jaw are joined by a growth suture that remains relatively flexible. As skeletal maturity develops, this suture becomes increasingly resistant to orthodontic expansion.
For this reason, many adults require surgical assistance to achieve meaningful skeletal widening of the upper jaw.
What Problems Can SARPE Correct?
Dental Crowding
Insufficient arch width can leave inadequate room for the teeth to align correctly.
By widening the upper arch, SARPE may create space that allows orthodontic treatment to proceed more effectively.
Crossbite
A crossbite occurs when the upper teeth sit inside the lower teeth rather than outside them.
Crossbites may lead to:
- Bite instability
- Uneven tooth wear
- Functional shifts of the jaw
- Facial asymmetry over time
SARPE is often one of the most effective methods of correcting a skeletal crossbite in adults.
Upper and Lower Jaw Imbalance
In some individuals, the upper jaw is simply too narrow relative to the lower jaw.
Expansion helps restore a more harmonious relationship between the jaws and creates the foundation for stable orthodontic and orthognathic treatment.
SARPE and Orthognathic Surgery
SARPE is frequently performed as part of a broader orthognathic treatment plan. It may be used before:
Creating the correct upper jaw width often improves the predictability and stability of later jaw surgery.
For many patients, SARPE represents the first stage of treatment rather than the final stage.
SARPE and Airway Function
The upper jaw forms an important component of the nasal airway.
In selected patients, widening the maxilla may influence:
- Nasal airflow
- Nasal resistance
- Breathing comfort
However, SARPE should not primarily be viewed as a treatment for obstructive sleep apnoea. The main objectives remain:
- Expansion of the upper jaw
- Correction of crossbite
- Creation of space
- Facilitation of orthodontic treatment
Where airway concerns exist, these are evaluated as part of the overall treatment plan.
Advanced Surgical Planning
Every SARPE procedure is planned using a combination of:
- Clinical examination
- Dental records
- Digital scans
- Photographic assessment
- CT imaging where appropriate
Planning allows assessment of:
- Upper jaw width
- Skeletal maturity
- Mid-palatal suture anatomy
- Airway considerations
- Future orthodontic requirements
The aim is to integrate expansion into a wider treatment strategy rather than viewing it as an isolated procedure.
The Procedure
SARPE is performed under general anaesthetic.
During surgery:
- The upper jaw is prepared to allow controlled expansion
- An expansion device is attached to the teeth
- The mid-palatal suture is released where appropriate
- Expansion begins shortly afterwards according to a planned schedule
The expansion itself occurs gradually over a period of days rather than during the operation.
This allows bone and soft tissues to adapt progressively.
The Expansion Phase
One of the unique aspects of SARPE is that part of the treatment occurs after surgery.
Patients are instructed how to activate the expansion device according to a prescribed schedule.
During this phase:
- The upper jaw gradually widens
- Space develops within the dental arch
- A temporary gap often appears between the front teeth
The appearance of this gap is expected and usually indicates that skeletal expansion is occurring successfully.
Orthodontic treatment subsequently closes the space.
Recovery After SARPE
Recovery is generally well tolerated.
Patients can typically expect:
- Mild swelling
- Temporary discomfort
- Gradual adaptation to the expansion device
- Progressive development of the expansion gap
Most patients return to routine activities relatively quickly. Following completion of expansion, the appliance remains in place while new bone forms and stabilises the result.
SARPE vs MARPE
A key consideration is how expansion is achieved.
SARPE (Surgically Assisted Expansion)
- Performed under general anaesthetic
- Involves surgical preparation of the upper jaw
- Predictable expansion
- Suitable for moderate to severe narrowing
MARPE (Miniscrew-Assisted Rapid Palatal Expansion)
- Non-surgical or minimally invasive approach
- Uses bone-anchored devices (miniscrews)
- Less predictable in skeletally mature patients
- Success depends on the status of the midline maxillary suture; progressive fusion begins in late adolescence
- Most effective in selected younger patients
In practice:
- SARPE is often the more reliable option where the upper jaw is fully developed or narrowing is more significant
- MARPE may be considered in carefully selected cases, but has limitations depending on age and skeletal maturity
Treatment selection is guided by detailed assessment, including imaging of the suture, rather than by age alone.
A Coordinated Approach
SARPE is typically part of a broader treatment plan.
It is often followed by:
- Orthodontic alignment
- In some cases, further orthognathic surgery
Careful sequencing ensures a stable and balanced final outcome.
Frequently Asked Questions
What does SARPE stand for?
SARPE stands for Surgically Assisted Rapid Palatal Expansion.
Can adults have palatal expansion?
Yes. SARPE was developed specifically to achieve palatal expansion in skeletally mature patients where orthodontics alone is insufficient.
Will a gap appear between my front teeth?
Usually yes. A temporary gap is expected during expansion and is subsequently corrected with orthodontic treatment.
Is SARPE painful?
Most patients experience manageable discomfort and pressure rather than severe pain.
Will I still need braces?
Yes. SARPE is usually combined with orthodontic treatment as part of a comprehensive treatment plan.
Is SARPE permanent?
Yes. The expansion creates a change in the underlying skeletal structure of the upper jaw. Long-term stability depends on careful orthodontic management and retention.
How is SARPE different from double jaw surgery?
SARPE widens the upper jaw. Double jaw surgery repositions the upper and lower jaws. In some patients, SARPE is performed before orthognathic surgery to create the correct foundation for later jaw movements.
Why Choose Dr Tom Pepper?
Successful palatal expansion requires careful understanding of:
- Skeletal anatomy and skeletal maturity
- Orthodontic principles
- Facial balance
- Airway considerations
- Long-term treatment sequencing
Dr Tom Pepper is a dual-qualified Consultant Oral and Maxillofacial Surgeon trained in both medicine and dentistry, with expertise in orthognathic surgery, facial skeletal surgery, and multidisciplinary treatment planning.
Treatment is designed around the individual patient, ensuring that expansion contributes to a stable, functional, and aesthetically balanced long-term result.
Consultation
Consultations for SARPE and adult palatal expansion are available in London at Harley Street and Cromwell Hospital.
A detailed assessment allows evaluation of your bite, jaw width, orthodontic requirements, facial proportions, and long-term treatment goals to determine whether SARPE, MARPE, or an alternative treatment pathway is most appropriate.