Spring-Assisted Craniosynostosis Surgery

Medical Disclaimer This article is for educational purposes only and does not replace medical advice, diagnosis, or treatment. Spring-assisted craniosynostosis surgery is not appropriate for every baby or every suture type. Treatment decisions depend on your child’s age, suture involved, head shape, head growth, imaging, pressure risk, eye findings, craniofacial team experience, and surgical recommendations. Always talk with your child’s pediatrician, pediatric neurosurgeon, craniofacial plastic surgeon, anesthesiologist, or craniofacial team about your child’s individual situation.

When parents hear that their baby may need craniosynostosis surgery, they are often told about two options first:

Endoscopic surgery with helmet therapy orOpen cranial vault remodeling

Then some families hear about a third option:

• Spring-assisted craniosynostosis surgery.
• That can raise a whole new set of questions.

Parents may wonder:

• What are cranial springs?
• Are springs inside my baby’s skull?
• Is this the same as endoscopic surgery?
• Does this mean my baby will not need a helmet?
• How do the springs reshape the head?
• When are the springs removed?
• Is there a second surgery?
• Which babies qualify?
• Is spring surgery safer than open surgery?
• Is it better than helmet therapy?
• What can go wrong?

The short answer is:

Spring-assisted craniosynostosis surgery is a minimally invasive or limited-incision approach in which surgeons remove or release the fused suture and place small metal springs across the bone gap. Over the next weeks to months, the springs gradually push the skull bones outward, helping reshape the skull as new bone forms. Unlike endoscopic strip craniectomy with helmet therapy, spring-assisted surgery often does not require a postoperative helmet, but it does require a second operation to remove the springs.

Spring-assisted surgery is most commonly discussed for sagittal craniosynostosis, the type that causes a long, narrow head shape. Great Ormond Street Hospital describes spring-assisted cranioplasty as an operation used to correct the abnormal head shape seen in sagittal craniosynostosis; it removes a small area of skull bone, makes controlled bone cuts near the fused sagittal suture, and inserts metal springs that gradually widen the gap while new bone forms. (GOSH Hospital site)

This guide explains spring-assisted surgery in parent-friendly language, including how it works, who may qualify, how it compares with helmet therapy and open surgery, and what questions parents should ask.

Quick Answer: What Is Spring-Assisted Craniosynostosis Surgery?

Spring-assisted craniosynostosis surgery uses small metal springs to gradually widen and reshape part of the skull after a fused suture is released.

The surgeon removes the fused suture or a strip of bone near it. Then the surgeon places springs across the opening. Over time, the springs open outward and gently push the skull bones apart. New bone forms in the widened gap as the skull expands.

Children’s Health explains that spring-assisted cranial expansion is most commonly used for sagittal craniosynostosis, though it may be used for other closed sutures in selected cases. The surgeon removes the closed suture with a thin strip of nearby bone and places two to three springs near the edges so spring expansion encourages crosswise skull widening. (Children’s Health)

The parent-friendly takeaway:

Spring surgery releases the fused suture and uses internal springs to guide skull expansion. It often avoids helmet therapy, but it requires a planned second surgery to remove the springs.

What Are Cranial Springs?

Cranial springs are small metal devices placed by the surgeon during surgery.

They are not like household springs. They are medical devices selected or shaped to apply controlled outward force to the skull bones. Their job is to gradually widen the skull in the direction the surgeons want.

Parents may hear these terms:

Spring-assisted cranioplastySpring-assisted cranial expansionSpring-mediated cranioplastySpring-assisted cranial remodelingDynamic spring-mediated craniofacial reshapingCranial springs

Texas Children’s describes spring-assisted cranial expansion as a procedure in which surgeons remove strips of bone through small scalp incisions, then place two internal springs within the bone gap. The springs actively widen the skull over several months. (Texas Children’s)

The practical message:

The springs are temporary internal devices that help reshape the skull gradually. They are not meant to stay in forever.

Why Would Springs Be Used?

Springs may be used because they can gradually reshape the skull after the fused suture is released.

In sagittal craniosynostosis, the skull often becomes long and narrow because the sagittal suture closes too early. The goal of spring-assisted surgery is often to help widen the skull from side to side and improve the long, narrow shape.

UPMC Children’s Hospital explains that spring-assisted cranioplasty can be performed for sagittal craniosynostosis and that the cranial spring allows reshaping and skull expansion to improve head shape and help prevent pressure from developing. (UPMC Children's Hospital of Pittsburgh)

A simple explanation:

• The fused suture is released.
• The springs push the skull bones apart slowly.
• The skull widens over weeks to months.
• New bone forms in the gap.
• The head shape improves gradually.
• The springs are later removed.

The patient-friendly takeaway:

Springs are used to guide gradual skull expansion from the inside instead of relying on a helmet from the outside.

Is Spring Surgery Brain Surgery?

Spring-assisted craniosynostosis surgery is usually surgery on the skull bones around the brain, not surgery on brain tissue itself.

A pediatric neurosurgeon and craniofacial plastic surgeon often work together because the skull bones sit over the brain’s protective covering, called the dura. The surgeons must safely release bone from that protective layer and avoid injury while reshaping the skull.

Great Ormond Street Hospital explains that this surgery involves separating skull bone from the protective layer covering the brain, which is why the operation is performed by a specialist craniofacial surgical team and why risks such as bleeding, infection, dura opening, and CSF leak are discussed. (GOSH Hospital site)

The simple explanation:

Spring surgery is close to the brain, so neurosurgical expertise matters. But the main operation is skull reshaping, not operating on the brain itself.

Which Type of Craniosynostosis Is Spring Surgery Most Often Used For?

Spring-assisted surgery is most commonly used for sagittal craniosynostosis.

Sagittal craniosynostosis happens when the sagittal suture closes too early. This can cause a long, narrow head shape called scaphocephaly.

Great Ormond Street Hospital specifically describes spring-assisted cranioplasty as an operation used for children with sagittal craniosynostosis. (GOSH Hospital site) Children’s Health also states that spring-assisted cranial expansion is most commonly used to treat sagittal suture craniosynostosis, although it may be used for other closed sutures in selected cases. (Children’s Health)

The parent-friendly takeaway:

If your baby has sagittal craniosynostosis, spring-assisted surgery may be one of the options your craniofacial team discusses.

Can Springs Be Used for Other Sutures?

Sometimes, but this depends heavily on the center and the child’s anatomy.

Some centers use spring-assisted techniques mainly for sagittal craniosynostosis. Other centers may use springs in selected cases involving other sutures or posterior vault expansion, depending on the team’s experience and surgical goals.

Children’s Health notes that spring-assisted cranial expansion is most commonly used for sagittal craniosynostosis but may be used for other closed sutures as well. (Children’s Health) Johns Hopkins also describes springs or similar devices as something surgeons may use during minimally invasive suturectomy to help push skull bones apart, although helmet therapy is usually needed after endoscopic surgery unless springs are used. (Johns Hopkins Medicine)

The practical message:

Spring surgery is not a one-size-fits-all technique. Ask your team how often they use springs for your baby’s specific suture type.

Why Age Matters

Spring-assisted surgery is usually most useful in younger babies because their skull bones are softer and more responsive to gradual reshaping.

Children’s Health says the ideal age for spring-assisted cranial expansion is 3 to 6 months, because younger babies have softer skull bones and thinner scalp tissue, allowing more effective reshaping. (Children’s Health) Great Ormond Street Hospital says spring-assisted cranioplasty is ideally performed at 4 to 6 months, while the skull bones are more pliable, and may still be possible up to about 8 months in that program. (GOSH Hospital site) UPMC Children’s Hospital describes spring-assisted cranioplasty as typically performed around 4 months of age. (UPMC Children's Hospital of Pittsburgh)

The parent-friendly takeaway:

Spring surgery is age-sensitive. Early referral matters because some babies may age out of the best window for spring-assisted reshaping.

Who May Be a Candidate?

A baby may be more likely to be considered for spring-assisted surgery if:

• The baby is young enough for the center’s spring-surgery window.
• The baby has sagittal craniosynostosis or another suture pattern the center treats with springs.
• The craniofacial team believes gradual expansion will improve the head shape.
• The skull bones are still flexible enough for spring-assisted remodeling.
• The child does not need a more complex open reconstruction.
• The family understands that a second operation is needed to remove the springs.
• The team has experience with this technique.

Texas Children’s says it offers spring-assisted cranial expansion for certain types of single-suture craniosynostosis, and that its plastic surgeon and neurosurgeon discuss which treatment technique is right based on the baby’s situation. (Texas Children’s)

The practical message:

Spring surgery may be an option for some babies with single-suture craniosynostosis, but candidacy depends on the baby’s age, suture type, head shape, and the craniofacial team’s experience.

Who May Not Be a Good Candidate?

Spring-assisted surgery may not be recommended when:

• The baby is outside the center’s preferred age window.
• The skull bones are less responsive to gradual expansion.
• The head shape needs more direct reshaping.
• The baby has complex multisuture craniosynostosis.
• The baby has syndromic craniosynostosis requiring staged planning.
• The forehead or eye sockets need direct reconstruction.
• The team believes open cranial vault remodeling would give a better result.
• The family is not comfortable with a second surgery for spring removal.
• The center does not offer or routinely perform spring-assisted surgery.

Great Ormond Street Hospital contrasts suturectomy-based operations, including springs and endoscopic suturectomy with helmeting, with vault remodeling operations. It explains that suturectomy-based approaches are usually effective only in small babies whose skulls are still elastic, while vault remodeling can be done at any age because the surgeon actively reshapes the skull rather than relying on passive reshaping. (GOSH Hospital site)

The patient-friendly takeaway:

Not qualifying for spring surgery does not mean your baby has no good options. It means another approach may fit the anatomy, age, or surgical goals better.

What Happens During Spring-Assisted Surgery?

The exact technique varies by center, but the general steps may include:

• The baby receives general anesthesia.
• The surgical team makes one or more scalp incisions.
• The fused suture or a strip of bone is removed.
• Controlled bone cuts may be made to allow movement.
• Two or more springs are placed across the opening.
• The springs gradually push the bones apart over time.
• The incision is closed, often with dissolvable stitches.
• The baby is monitored in the hospital.

Great Ormond Street Hospital describes an incision over the top of the head, removal of part of the fused sagittal suture, osteotomies on either side of the fused suture, placement of two metal springs across the gap, and dissolvable skin closure. (GOSH Hospital site) Children’s Health describes removal of the closed suture with a thin strip of adjacent bone, followed by placement of two to three springs near the edges. (Children’s Health)

The parent-friendly takeaway:

Spring surgery releases the fused suture and places springs that continue reshaping the skull after the operation is over.

Are the Springs Inside or Outside the Head?

The springs are placed internally, within the surgical area near the skull bones.

Parents may be able to feel or notice areas where the springs are located, depending on the baby’s scalp, swelling, and surgical plan. The surgical team should explain whether you will be able to feel them, how to protect the area, and what signs would be concerning.

Texas Children’s describes the springs as internal springs placed within the bone gap. (Texas Children’s)

The practical message:

The springs are internal devices placed by the surgeon. Parents should ask what they may feel under the scalp and how to handle normal baby care while springs are in place.

How Do the Springs Reshape the Skull?

The springs apply outward force over time.

In sagittal craniosynostosis, the skull is often too narrow side-to-side. Springs can help widen the skull by pushing the bones outward after the fused sagittal suture has been removed.

Great Ormond Street Hospital explains that the springs open over the following weeks to widen the gap, while new bone forms in the gap over the coming months. (GOSH Hospital site) Children’s Health describes the expansion of the springs as encouraging crosswise expansion of the skull. (Children’s Health)

A simple explanation:

The springs gradually do some of the widening that a helmet would otherwise help guide from outside, or that open surgery would accomplish more directly in the operating room.

Does Spring Surgery Require a Helmet?

Often, no.

One reason families may hear about spring-assisted surgery is that it can reduce or eliminate the need for postoperative helmet therapy.

Texas Children’s explains that spring-assisted cranial expansion is similar to endoscopic assisted craniectomy, but instead of using a postoperative cranial molding helmet, the surgeon places internal springs that reshape the skull over several months. Texas Children’s specifically states that the procedure does not require a postoperative helmet, but it does require a second operation to remove the springs. (Texas Children’s)

Johns Hopkins also explains that after endoscopic surgery, a cranial orthotic helmet is usually needed, although it is usually not needed if springs were used. (Johns Hopkins Medicine)

The parent-friendly takeaway:

Spring surgery may avoid helmet therapy, but it does not avoid follow-up — and it does require spring removal.

Does Spring Surgery Require a Second Operation?

Yes.

The springs are temporary and must be removed after they have done their job.

Timing varies by center and by the child’s response. Children’s Health states that springs are removed 2 to 3 months after placement. (Children’s Health) Great Ormond Street Hospital says spring removal is individualized but performed around 3 months on average. (GOSH Hospital site) UPMC Children’s Hospital describes spring removal around 4 months after placement. (UPMC Children's Hospital of Pittsburgh) Texas Children’s describes a second operation about 5 months later to remove the springs. (Texas Children’s)

The practical message:

Spring-assisted surgery is usually a two-operation plan: one surgery to place the springs, and a shorter second surgery to remove them.

What Is Spring Removal Like?

Spring removal is usually shorter than the first surgery.

Great Ormond Street Hospital describes spring removal as a short operation under general anesthesia, lasting about an hour on average in its program. The surgeon reopens the incision, removes the springs, checks new bone formation, closes the incision with dissolvable stitches, and the child usually goes home the same day after recovering from anesthesia. (GOSH Hospital site)

UPMC Children’s Hospital describes spring removal as a shorter procedure that occurs months after the first surgery. (UPMC Children's Hospital of Pittsburgh)

The parent-friendly takeaway:

Spring removal is still surgery and still uses anesthesia, but it is usually shorter and simpler than the first spring-placement operation.

How Long Is the Hospital Stay?

Hospital stay varies by center, child, and surgical plan.

Great Ormond Street Hospital describes children going home when they are recovering well, eating and drinking normally, and the X-ray has been reviewed — usually the day after surgery in that program. (GOSH Hospital site) Children’s Health lists shorter hospital stay as one of the benefits of spring-assisted cranial expansion compared with open cranial vault procedures. (Children’s Health)

A 2025 retrospective review of spring-assisted cranioplasty for isolated sagittal craniosynostosis reported short operative times and hospital stays, but hospital stay and transfusion rates vary by center and protocol. (AJOPS)

The practical message:

Spring-assisted surgery may involve a shorter hospital stay than open vault remodeling in some centers, but parents should ask their own team for expected ICU needs, floor stay, and discharge criteria.

How Is Spring Surgery Different From Endoscopic Surgery With Helmet Therapy?

Spring-assisted surgery and endoscopic strip craniectomy with helmet therapy are both less-invasive approaches compared with traditional open vault remodeling, but they are not the same.

Question

Endoscopic with helmet

Spring-assisted surgery

What is removed?

Fused suture or strip of bone

Fused suture or strip of bone

What guides reshaping?

External helmet plus growth

Internal springs plus growth

Helmet needed?

Usually yes

Often no

Second surgery?

Usually no, unless another issue occurs

Yes, planned spring removal

Follow-up focus

Helmet adjustments and head growth

Spring expansion, X-rays or imaging, spring removal

Best age

Young infants

Young infants

Main tradeoff

Helmet commitment

Second operation for spring removal

Johns Hopkins describes endoscopic strip craniectomy as a minimally invasive suture-removal operation; it notes that springs may be used to help push bones apart, and that helmets are usually needed after endoscopic surgery unless springs are used. (Johns Hopkins Medicine) Texas Children’s also explains that spring-assisted cranial expansion is similar to endoscopic assisted craniectomy, but uses internal springs instead of a postoperative helmet. (Texas Children’s)

The parent-friendly takeaway:

Endoscopic-with-helmet uses an external helmet. Spring surgery uses internal springs. Both rely on early skull growth, but the follow-up burden is different.

How Is Spring Surgery Different From Open Cranial Vault Remodeling?

Open cranial vault remodeling reshapes the skull bones directly during surgery. Spring-assisted surgery releases the fused suture and uses gradual spring-driven expansion over time.

Question

Spring-assisted surgery

Open cranial vault remodeling

Surgical exposure

More limited

Larger exposure

Reshaping

Gradual, spring-driven

Direct, surgeon-driven

Helmet

Often no

Usually no

Second surgery

Yes, spring removal

Usually not for device removal

Age

Best in younger babies

Can be used in older babies and children

Blood loss

Often less than open surgery, but varies

Often higher than limited approaches

Predictability

Depends on passive expansion and growth

More direct and often more predictable

Best fit

Selected young babies, often sagittal

Older babies, more severe shapes, forehead/orbit or complex cases

Great Ormond Street Hospital explains that suturectomy-based operations such as spring-assisted cranioplasty and endoscopic suturectomy with helmeting rely on passive skull reshaping in small babies, while vault remodeling operations actively reshape the head and can be done at any age. It also notes that suturectomy-based approaches may offer shorter recovery and lower transfusion rates, while vault remodeling may offer more predictable and stable correction. (GOSH Hospital site)

The practical message:

Spring surgery sits between endoscopic-with-helmet and open remodeling: it is limited-incision and growth-guided, but uses internal devices that must be removed later.

What Are the Benefits of Spring-Assisted Surgery?

Families may hear several possible benefits, especially compared with open cranial vault remodeling.

Possible benefits include:

• Smaller incision than many open vault operations
• Less extensive bone cuts than full vault remodeling
• Gradual reshaping over time
• No postoperative helmet in many protocols
• Shorter hospital stay than open surgery in some centers
• Less blood loss and lower transfusion risk than open procedures in some programs
• Useful early option for selected sagittal craniosynostosis cases

Children’s Health lists less scalp scarring, less blood loss and transfusion risk, and shorter hospital stay as benefits compared with open cranial vault procedures. (Children’s Health) Great Ormond Street Hospital similarly states that suturectomy-based approaches such as spring-assisted surgery may have less extensive incisions and bone cuts, shorter hospital stay, faster recovery, and lower transfusion rates than vault remodeling operations. (GOSH Hospital site)

The parent-friendly takeaway:

Spring surgery may offer a less extensive first operation than open vault remodeling while avoiding the daily helmet commitment of endoscopic surgery.

What Are the Tradeoffs?

Spring-assisted surgery also has tradeoffs.

Parents should understand:

• It is age-sensitive.
• It is not offered at every center.
• It is most often used for sagittal craniosynostosis.
• It relies on gradual passive reshaping.
• Results can vary.
• A second operation is needed to remove the springs.
• The springs may fail, dislodge, or cause skin problems in rare cases.
• Some children may still need later vault remodeling for residual shape concerns or other issues.
• Follow-up imaging or X-rays may be needed.

Great Ormond Street Hospital explains that suturectomy-based operations rely on passive skull growth, which can make results less predictable; it estimates that about 5% of children who have spring-assisted cranioplasty in its series may require another operation for appearance reasons. (GOSH Hospital site) GOSH also notes spring-specific risks such as spring failure, dislodgement, or skin breakdown over the springs, although these are not usually harmful and may require repeat surgery in some cases. (GOSH Hospital site)

The practical message:

Spring surgery may reduce helmet burden and surgical exposure, but it adds device-related follow-up and a planned second operation.

What Risks Should Parents Ask About?

Spring-assisted craniosynostosis surgery has general craniofacial surgery risks and spring-specific risks.

General risks may include:

Anesthesia risks

Bleeding

Blood transfusion

Infection

Swelling and bruising

Pain

Wound problems

Dura opening

Cerebrospinal fluid leak

Brain injury or bleeding, rarely

Seizure or stroke, very rarely

Need for revision surgery

Spring-specific risks may include:

• Spring failure
• Spring dislodgement
• Spring exposure
• Skin breakdown over the spring
• Infection requiring early spring removal
• Need for repeat operation
• Incomplete head-shape correction
• Need for later vault remodeling

Great Ormond Street Hospital discusses infection, bleeding, rare neurological risks, CSF leak, swelling, bruising, spring failure or dislodgement, and rare skin breakdown over springs. (GOSH Hospital site) A 2025 retrospective review of 104 patients treated with spring-assisted cranioplasty reported complications such as spring exposure, surgical site infection requiring early spring removal, and a small revision vault expansion rate, while concluding that isolated sagittal craniosynostosis can be safely and effectively managed with the technique in that center’s experience. (AJOPS)

The parent-friendly takeaway:

Spring surgery is less extensive than many open operations, but it is still skull surgery and still requires careful discussion of risks, follow-up, and possible revision.

Will My Baby Need a Blood Transfusion?

Blood transfusion risk varies by center, technique, age, and blood-conservation strategy.

Some parent-facing programs describe spring-assisted surgery as having less blood loss and lower transfusion risk than open vault remodeling. Children’s Health lists less blood loss and transfusion risk as a benefit compared with open cranial vault procedures. (Children’s Health) Great Ormond Street Hospital states that blood transfusion is required only in a minority of cases in its spring-assisted cranioplasty program. (GOSH Hospital site)

However, transfusion rates vary across published series. A 2025 retrospective review reported transfusion during spring insertion in just over half of patients at one center, showing why parents should ask their own team for center-specific expectations rather than relying on general statements. (AJOPS)

The practical question:

“What is the transfusion rate for spring-assisted surgery at your center?”

What Happens After the First Surgery?

After spring placement, the care team monitors recovery, swelling, pain control, feeding, incision healing, and spring position.

Great Ormond Street Hospital describes regular nursing observations after surgery, monitoring of breathing, heart rate, temperature, and head bandage, upright positioning to reduce swelling, pain control, and return to eating and drinking as the child feels ready. The day after surgery, the head bandage and drain may be removed, and an X-ray may be used to check spring position and serve as a baseline for expansion. (GOSH Hospital site)

Parents may be told to watch for:

Fever

Wound redness

Wound drainage

Clear fluid leakage

Increasing swelling

Poor feeding

Repeated vomiting

Unusual sleepiness

Spring-area skin problems

Head shape concerns

The practical message:

Spring placement is only the first step. The team must monitor healing, spring position, skull expansion, and timing for removal.

Will the Springs Be Visible or Felt?

Sometimes parents can feel the springs or notice the areas where they sit.

This depends on scalp thickness, swelling, spring position, and surgical technique. Your surgical team should explain what is expected.

Ask:

• Will we be able to feel the springs?
• Will the springs make bumps under the scalp?
• Can my baby sleep normally?
• Are there positioning restrictions?
• Can the baby do tummy time?
• What activities should we avoid?
• What would spring exposure or skin breakdown look like?

Great Ormond Street Hospital notes that rare skin breakdown over the springs can occur, which is one reason parents are taught what wound or skin changes to watch for. (GOSH Hospital site)

The parent-friendly takeaway:

Feeling or seeing spring-related contour may be expected, but redness, skin thinning, drainage, or exposed hardware should be reported right away.

What Follow-Up Happens While Springs Are In?

Follow-up varies by center.

Possible follow-up may include:

• Post-op wound check
• X-rays or imaging to check spring position and expansion
• Head-shape measurements
• Photos
• Craniofacial clinic visits
• Neurosurgery and plastic surgery follow-up
• Monitoring for skin problems over springs
• Planning the spring removal date

Great Ormond Street Hospital describes a follow-up appointment with an X-ray about three weeks after surgery to check surgical results. It also describes an X-ray before discharge to check spring position and establish a baseline for monitoring expansion. (GOSH Hospital site)

The practical message:

Spring follow-up is different from helmet follow-up. Instead of helmet adjustments, the team monitors spring expansion and plans removal.

What Happens If a Spring Moves or Breaks?

Spring problems are uncommon but possible.

Great Ormond Street Hospital lists spring failure or dislodgement as spring-specific risks. It notes that failure or dislodgement is not usually harmful, but could mean the operation needs to be repeated. (GOSH Hospital site)

Parents should ask:

• How often do springs dislodge at this center?
• What symptoms would we notice?
• Would an X-ray show the problem?
• Would spring removal happen early?
• Would repeat surgery be needed?
• Would head shape still improve?

The patient-friendly takeaway:

Spring movement or failure is a known device-related risk. It does not always cause harm, but it needs prompt evaluation.

Does Spring Surgery Mean Better Results Than Helmet Therapy?

Not necessarily.

Spring-assisted surgery and endoscopic surgery with helmet therapy are both used in selected young babies, especially for sagittal craniosynostosis. Which is better depends on the child, center, surgical technique, helmet access, family logistics, and outcome goals.

A systematic review comparing endoscopic strip craniectomy with postoperative helmet therapy and spring-assisted cranioplasty for nonsyndromic single-suture sagittal craniosynostosis stated that both are commonly used minimally invasive techniques and that it is unclear which, if either, is superior. (The Journal of Neuroscience) Great Ormond Street Hospital similarly states that there is limited useful evidence showing one operation is superior to another, and that craniofacial units offer procedures they know are safe and effective in their own hands. (GOSH Hospital site)

The practical message:

The better question is not “Are springs better?” The better question is “Which approach has the best expected result for my baby at this center?”

Does Spring Surgery Mean Better Results Than Open Surgery?

Not necessarily.

Spring-assisted surgery may involve smaller incisions, shorter hospital stay, and less transfusion risk in some settings, but open vault remodeling may provide more direct and predictable reshaping, especially in older babies, more severe shapes, or complex cases.

Great Ormond Street Hospital explains that vault remodeling operations actively reshape the head and can be more predictable and stable, but they involve longer scars, longer operations, and higher transfusion rates. (GOSH Hospital site)

The parent-friendly takeaway:

Spring surgery may be less extensive, but open surgery may be more direct. The right choice depends on age, skull shape, suture type, and the team’s experience.

Spring Surgery vs Helmet vs Open Surgery: Parent Comparison

Feature

Endoscopic + helmet

Spring-assisted surgery

Open cranial vault remodeling

Main method

Remove fused suture, guide growth with helmet

Remove fused suture, guide growth with internal springs

Directly reshape skull bones

Incisions

Small

Small or limited

Larger

Helmet

Usually yes

Often no

Usually no

Second planned surgery

Usually no

Yes, spring removal

Usually no device-removal surgery

Age

Young infants

Young infants

Infants or older children depending on need

Common suture

Sagittal, lambdoid; selected others

Mostly sagittal; selected others by center

Any suture depending on plan

Reshaping

Growth plus helmet

Growth plus springs

Direct surgical reshaping

Follow-up burden

Frequent helmet visits

Spring monitoring and removal surgery

Surgical follow-up

Main tradeoff

Helmet commitment

Second surgery

Larger first surgery

Johns Hopkins describes endoscopic surgery, springs, cranial vault remodeling, and distraction as different craniosynostosis surgical approaches chosen based on age, severity, and other factors. (Johns Hopkins Medicine)

What If My Center Does Not Offer Spring Surgery?

Not every craniofacial center offers spring-assisted surgery.

That does not mean your child is missing the only good option. Many centers use endoscopic surgery with helmet therapy or open cranial vault remodeling with excellent results in appropriate candidates.

Texas Children’s states that its team offers several surgical techniques, including open cranial vault remodeling, endoscopic strip craniectomy with helmet molding, spring-assisted cranial expansion, and distraction osteogenesis, and that treatment is chosen based on age, fused suture, and other considerations. (Texas Children’s)

The practical message:

Spring surgery is one option, not the only option. If you are interested in it, ask whether your center offers it or whether a second opinion at a spring-experienced center is appropriate.

Ask your craniofacial team:

• Is my baby a candidate for spring-assisted surgery?
• Which suture is fused?
• Is this most commonly used for my baby’s suture type?
• How old is my baby compared with your preferred spring-surgery window?
• Why do you recommend springs instead of endoscopic surgery with helmet therapy?
• Why do you recommend springs instead of open cranial vault remodeling?
• How many spring-assisted craniosynostosis surgeries has your team performed?
• Will both neurosurgery and craniofacial plastic surgery be involved?
• How many springs will be placed?
• Where will the incision be?
• Will my baby need a helmet afterward?
• When will the springs be removed?
• How long is the second operation?
• Will my baby go home the same day after spring removal?
• What imaging is needed before and after surgery?
• What are the risks of spring failure, dislodgement, exposure, or infection?
• What is your transfusion rate for spring-assisted surgery?
• What is your revision surgery rate?
• What head-shape result should we expect?
• Could open surgery still be needed later?

Ask:

• When do you usually remove springs?
• What determines removal timing?
• Is removal outpatient or inpatient?
• How long does removal surgery take?
• Will the same incision be used?
• Will anesthesia be needed?
• How soon can my baby eat after removal?
• What should we watch for after removal?
• Will additional imaging be needed?
• What happens if springs need to be removed early?

Great Ormond Street Hospital explains that spring removal timing is individualized, but averages around three months in its program; the removal operation is shorter, uses general anesthesia, and children usually go home the same day after recovery. (GOSH Hospital site)

Red Flags: When to Call the Surgical Team

Call your child’s surgical team promptly if your baby has:

Fever

Increasing redness around the incision

Drainage from the incision

Clear fluid leakage

Worsening swelling

Bleeding that does not stop as instructed

Repeated vomiting

Poor feeding

Unusual sleepiness or difficulty waking

Trouble breathing

Seizure-like activity

Bulging soft spot

New weakness or unusual movement

Skin thinning over a spring

Skin breakdown over a spring

A spring area that looks exposed

A sudden change in the feel or position of a spring

Any symptom your discharge instructions list as urgent

Great Ormond Street Hospital specifically notes that CSF leak may appear as a fluid-filled swelling or clear watery wound leakage, and that families are taught what to do if they notice wound or spring-related problems. (GOSH Hospital site)

Seek urgent or emergency care if your baby is difficult to wake, has trouble breathing, has repeated vomiting, has seizure-like activity, or seems seriously ill.

Common Parent Fears

“Are springs safe inside my baby’s skull?”

Spring-assisted surgery is a recognized craniosynostosis technique, but it still has risks. Ask your team about their experience, complication rates, spring exposure risk, infection risk, and spring removal process. Great Ormond Street Hospital describes spring-specific risks such as failure, dislodgement, and rare skin breakdown over springs. (GOSH Hospital site)

“Will my baby need a helmet?”

Often no, if springs are being used for the reshaping role. Texas Children’s states that spring-assisted cranial expansion does not require a postoperative helmet, but does require a second operation to remove the springs. (Texas Children’s)

“Is spring surgery better than endoscopic surgery with helmet therapy?”

Not always. Both can be good options in selected young babies. A systematic review found that both are commonly used minimally invasive techniques for nonsyndromic sagittal craniosynostosis and that superiority is unclear. (The Journal of Neuroscience)

“Is spring surgery better than open surgery?”

Not always. Spring surgery may be less extensive, but open surgery may provide more direct reshaping. Great Ormond Street Hospital explains that vault remodeling operations can be more predictable because surgeons actively reshape the head, while suturectomy-based approaches rely on passive growth and expansion. (GOSH Hospital site)

“Will my baby need a second surgery?”

Yes. Spring-assisted surgery requires a planned second procedure to remove the springs. Removal timing varies by center, commonly ranging from a few months after placement to about five months depending on the program. (Children’s Health)

“Can springs be used if my baby is older?”

Maybe, but spring surgery is usually best in younger babies. Children’s Health describes the ideal age as 3 to 6 months, and Great Ormond Street Hospital says it is ideally performed at 4 to 6 months and possible up to 8 months in that program. (Children’s Health)

How to Explain Spring-Assisted Surgery to Family

Here is a simple explanation:

“Spring-assisted craniosynostosis surgery is a limited-incision surgery where the surgeons remove the fused skull seam and place small metal springs in the skull bone gap. The springs slowly push the skull bones outward over the next few months so the head can widen and reshape as new bone grows. It is often used for sagittal craniosynostosis in young babies. It usually avoids helmet therapy, but the springs have to be removed later in a second, shorter surgery.”

This can help relatives understand why spring surgery is different from both helmet therapy and open surgery.

Spring-assisted craniosynostosis surgery is also called spring-assisted cranioplasty, spring-assisted cranial expansion, or spring-mediated cranioplasty.

• It is most commonly used for sagittal craniosynostosis.
• It may be used for other sutures in selected cases at certain centers.
• The surgery removes or releases the fused suture and places internal springs across the bone gap.
• The springs gradually widen the skull over weeks to months.
• New bone forms in the widened gap.
• Spring surgery often does not require postoperative helmet therapy.
• Spring surgery does require a planned second operation to remove the springs.

The ideal age varies by center, but spring surgery is usually considered in young infants because the skull bones are more flexible.

Spring surgery is different from endoscopic strip craniectomy with helmet therapy.

Spring surgery is also different from open cranial vault remodeling.

Possible benefits include smaller incisions, gradual expansion, no helmet in many protocols, and shorter hospital stay than open surgery in some centers.

Tradeoffs include a second surgery, device-related risks, and less direct reshaping than open vault remodeling.

Risks can include bleeding, infection, CSF leak, spring failure, dislodgement, skin breakdown, incomplete correction, and need for further surgery.

Not every craniofacial center offers spring-assisted surgery.

The simplest parent-friendly summary is:

Spring-assisted craniosynostosis surgery uses temporary internal springs to gradually reshape the skull after a fused suture is released. It may avoid helmet therapy, but it adds a planned second surgery for spring removal and is usually best suited to selected young babies, especially those with sagittal craniosynostosis.

Frequently Asked Questions About Spring-Assisted Craniosynostosis Surgery

What is spring-assisted craniosynostosis surgery?

Spring-assisted craniosynostosis surgery is a procedure in which surgeons remove or release a fused skull suture and place small metal springs that gradually widen the skull over time. Great Ormond Street Hospital describes spring-assisted cranioplasty as removing a small part of skull bone, making controlled bone cuts, and inserting metal springs that widen the gap as new bone forms. (GOSH Hospital site)

What is spring-assisted cranioplasty?

Spring-assisted cranioplasty is another name for spring-assisted craniosynostosis surgery. It is most often used for sagittal craniosynostosis to improve a long, narrow head shape.

What is spring-assisted cranial expansion?

Spring-assisted cranial expansion is a term used by some centers for the same general concept: using internal springs to expand and reshape the skull after releasing a fused suture. Texas Children’s describes it as placing internal springs within the bone gap so the springs actively reshape the skull over several months. (Texas Children’s)

Which craniosynostosis type is spring surgery most commonly used for?

Spring surgery is most commonly used for sagittal craniosynostosis. Children’s Health states that spring-assisted cranial expansion is most commonly used to treat sagittal suture craniosynostosis. (Children’s Health)

Can spring surgery be used for other sutures?

Sometimes, depending on the center and the child’s anatomy. Children’s Health notes that spring-assisted cranial expansion may be used to treat other closed sutures as well, although sagittal is the most common use. (Children’s Health)

What age is best for spring-assisted surgery?

The preferred age varies by center. Children’s Health describes the ideal age as 3 to 6 months. Great Ormond Street Hospital says it is ideally carried out at 4 to 6 months and may be possible up to 8 months in its program. UPMC Children’s Hospital describes the surgery as typically performed around 4 months. (Children’s Health)

Why does age matter?

Age matters because spring-assisted reshaping works best when the baby’s skull bones are still soft and responsive to gradual expansion. Children’s Health states that younger ages are best because the skull bones are soft and the scalp is thin, allowing more effective reshaping. (Children’s Health)

Does spring surgery require a helmet?

Often no. Texas Children’s states that spring-assisted cranial expansion does not require a postoperative helmet, but it does require a second operation to remove the springs. (Texas Children’s)

How is spring surgery different from endoscopic surgery with helmet therapy?

Both release the fused suture, but endoscopic surgery usually uses a helmet afterward to guide growth, while spring surgery uses internal springs to guide expansion. Johns Hopkins notes that after endoscopic surgery, helmet therapy is usually needed unless springs were used. (Johns Hopkins Medicine)

How is spring surgery different from open cranial vault remodeling?

Spring surgery relies on gradual internal spring expansion in a young baby. Open cranial vault remodeling reshapes the skull bones directly during surgery. Great Ormond Street Hospital explains that suturectomy-based operations rely on passive skull reshaping in small babies, while vault remodeling operations actively remodel the head and can be more predictable. (GOSH Hospital site)

Does spring surgery need a second operation?

Yes. The springs must be removed. Timing varies by center. Children’s Health describes spring removal at 2 to 3 months, Great Ormond Street Hospital says around 3 months on average, UPMC describes removal after about 4 months, and Texas Children’s describes removal about 5 months later. (Children’s Health)

What is spring removal like?

Spring removal is usually a shorter procedure under general anesthesia. Great Ormond Street Hospital describes opening the prior incision, removing the springs, checking new bone formation, closing with dissolvable stitches, and discharge home the same day once recovered. (GOSH Hospital site)

How many springs are used?

It depends on the surgeon and technique. Great Ormond Street Hospital describes two metal springs in its parent information. Children’s Health describes two to three springs. (GOSH Hospital site)

Will my baby need a blood transfusion?

Maybe. Some centers describe lower transfusion risk than open surgery, but transfusion rates vary. Children’s Health lists less blood loss and transfusion risk as a benefit compared with open cranial vault procedures. Great Ormond Street Hospital states transfusion is required only in a minority of cases in its program. A 2025 retrospective review reported a higher transfusion rate in one center’s series, which is why parents should ask for their own center’s data. (Children’s Health)

What are the risks of spring surgery?

Risks can include anesthesia risks, infection, bleeding, transfusion, swelling, CSF leak, rare neurologic injury, spring failure, spring dislodgement, skin breakdown over springs, incomplete correction, and need for later surgery. Great Ormond Street Hospital describes both general craniofacial surgery risks and spring-specific risks. (GOSH Hospital site)

Can a spring move or break?

It can happen. Great Ormond Street Hospital notes that spring failure or dislodgement is a spring-specific risk; it is not usually harmful but may mean the operation needs to be repeated. (GOSH Hospital site)

How long is the hospital stay after spring surgery?

It varies by center. Great Ormond Street Hospital describes discharge usually the day after surgery when the child is recovering well, eating and drinking, and the X-ray has been reviewed. Children’s Health lists shorter hospital stay than open surgery as one benefit. (GOSH Hospital site)

Is spring surgery better than helmet therapy?

Not always. Spring-assisted surgery and endoscopic surgery with helmet therapy are both minimally invasive options for selected babies, especially with sagittal craniosynostosis. Evidence does not clearly prove one is superior in every case, so the best option depends on the baby and center experience. (The Journal of Neuroscience)

Is spring surgery better than open surgery?

Not always. Spring surgery may involve smaller incisions and less extensive bone work, but open surgery may provide more direct and predictable reshaping in some cases. Great Ormond Street Hospital explains the tradeoff between passive spring/helmet-based reshaping and active vault remodeling. (GOSH Hospital site)

What should I ask before choosing spring surgery?

Ask whether your baby is a candidate, which suture is fused, how often the team performs spring surgery, how many springs are used, when springs will be removed, whether helmet therapy is needed, what imaging and X-rays are required, what complications the center sees, and what the chance is of needing later open surgery.

Suggested External Sources for the Published Blog

Use these at the bottom of the published article as a “Sources” section:

Great Ormond Street Hospital — Spring-Assisted Cranioplasty Best for: parent-friendly explanation of spring-assisted cranioplasty, sagittal craniosynostosis, ideal timing, operative steps, spring removal, risks, follow-up, alternatives, and outcomes. (GOSH Hospital site)

Texas Children’s — Spring-Assisted Cranial Expansion for CraniosynostosisBest for: explaining internal springs, no postoperative helmet, second operation for spring removal, small incisions, and how spring surgery compares with endoscopic craniectomy plus helmet therapy. (Texas Children’s)

Children’s Health — Pediatric Spring-Assisted Cranial Expansion Best for: ideal age, sagittal craniosynostosis use, two to three springs, spring removal timing, and benefits compared with open cranial vault surgery. (Children’s Health)

UPMC Children’s Hospital of Pittsburgh — Spring Assisted Cranioplasty Best for: parent-level overview, sagittal craniosynostosis, typical age, how springs expand the skull, pre-op preparation, CT/labs, post-op care, and spring removal procedure. (UPMC Children's Hospital of Pittsburgh)

Johns Hopkins Medicine — Craniosynostosis Surgery Best for: comparison of craniosynostosis surgery options, endoscopic strip craniectomy, springs, helmet therapy, cranial vault remodeling, distraction osteogenesis, and how age and severity affect surgical choice. (Johns Hopkins Medicine)

Australasian Journal of Plastic Surgery — Spring-Assisted Cranioplasty for Isolated Sagittal CraniosynostosisBest for: published clinical series discussing spring-assisted cranioplasty outcomes, operative times, transfusion rates, complications, revision surgery, and long-term follow-up in isolated sagittal craniosynostosis. (AJOPS)