Institute for Spine & Scoliosis, World Renowned Founders and Pioneers of ASC - Flexible Scoliosis Surgery
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Institute for Spine & Scoliosis, World Renowned Founders and Pioneers of ASC - Flexible Scoliosis Surgery
Start Here

Returning Patient Inquiries: 609-912-1500

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Institute for Spine & Scoliosis, World Renowned Founders and Pioneers of ASC - Flexible Scoliosis Surgery

From Evaluation to Recovery and Beyond: What the ASC Journey Is Really Like

A clear, step-by-step look at the road to Anterior Scoliosis Correction:

Choosing surgery for scoliosis is a significant step, and it is natural to seek clear, reliable information along the way. Our scoliosis specialists lead by Dr M Darryl Antonacci, developed this guide to outline the full course of Anterior Scoliosis Correction (ASC), from the initial evaluation and surgical planning to the procedure itself, postoperative recovery, and long-term follow-up.

Each stage reflects the questions we address most frequently in clinical practice, presented in the sequence patients typically experience. Whether you are beginning to explore treatment options or preparing for your postoperative visits, this overview provides a structured, accurate understanding.

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Important: The information below is educational and does not replace medical advice. Always discuss your specific case with your treating surgeon or care team.

Summary

  • ASC preserves motion while correcting the curve through a minimally invasive, front-of-the-spine approach.
  • Ideal candidates typically have flexible curves and some remaining growth, and they must meet specific medical criteria.
  • The evaluation includes imaging, a detailed physical exam, and discussions about goals, readiness, and long-term expectations.
  • On surgery day, anchors and a tensioned cord are placed to correct the curve, followed by structured recovery and early mobility.
  • Recovery progresses in phases, with most patients returning to light activity within weeks and restrictions easing as healing continues.
  • Long-term outcomes often include stable correction, retained flexibility, and a return to full activity with ongoing follow-up.
  • Compared with spinal fusion, ASC preserves motion and may allow continued curve adjustment, while fusion remains appropriate for curves outside ASC criteria.

Stage 1 – What Is Anterior Scoliosis Correction (ASC)?

Key Takeaways:

  • ASC corrects the curve while maintaining segmental motion in the spine.
  • The procedure is performed through the front of the body using minimally invasive techniques.
  • The tensioned cord allows gradual modulation of the curve as the spine continues to grow or adapt.
  • ASC preserves spinal mobility; metal-rod fusion permanently fixes vertebrae in place.
  • ASC may allow postoperative adjustment as the spine grows or remodels.
  • Fusion remains an excellent option for curves outside ASC indications.
  • Decision-making depends on curve behavior, age, goals, and long-term expectations.

Anterior Scoliosis Correction is a motion-preserving scoliosis procedure that uses strategically placed anchors and a tensioned cord to help correct spinal curvature while keeping flexibility. It offers an alternative to traditional fusion for the right patient.

ASC offers a different path compared to traditional fusion, especially for patients looking for scoliosis treatment options that protect motion. Understanding the contrasts between these two procedures can help guide an informed decision.

Are certain types of scoliosis curves easier to treat or have a better prognosis?

Yes. In general, curves that are more flexible and less stiff are easier to correct and tend to have a better prognosis. Flexible curves respond better to non-fusion techniques like ASC because the spine can be gently brought toward a more natural alignment without needing to be fused.

More rigid curves, especially those that have been present for many years or are associated with conditions like flat-back or hyperkyphosis, may need more advanced planning, more levels released, or sometimes staged procedures. Your X-rays, bending films, and clinical exam help the surgeon determine how “cooperative” your curve is likely to be.

What makes ASC different from traditional fusion surgery?

Traditional fusion surgery uses metal rods and screws to lock segments of the spine together so they no longer move. This can straighten the curve but permanently removes motion at the fused levels and may put extra stress on discs above and below the fusion.

ASC (Anterior Scoliosis Correction) is a motion-preserving technique. The surgeon approaches the spine from the front/side, releases the discs at the curved levels, and uses a strong cord and screws to gradually correct the curve while keeping those levels mobile. The goal is to correct both the side-to-side curve and the rotation, while maintaining as much natural movement as possible.

Is fusion still the only option if my curve is over 40 degrees?

Not necessarily. In the past, curves over 40–45 degrees were commonly treated with fusion because that was the main established surgical option. Newer techniques like ASC have expanded what is possible, especially when the curve is still flexible and the overall spinal balance can be restored.

However, not every curve over 40 degrees is automatically a candidate for ASC. Factors like flexibility, rotation, disc health, bone quality, age, and other medical conditions all matter. A surgeon experienced in both fusion and non-fusion techniques can help determine what is realistic for your specific case.

Can scoliosis exercises or chiropractic care reverse my curve?

Exercises, physical therapy, and some chiropractic approaches may help with posture, muscle balance, pain, and overall function, but they do not typically reverse a structural scoliosis curve, especially once it is moderate to severe.

Scoliosis is a three-dimensional condition involving bone rotation, disc wedging, and changes in spinal alignment. While non-surgical care can be very helpful for comfort and strength, it should not be expected to fully “untwist” or structurally correct larger curves. For significant curves, bracing or surgery may still be needed.

How do I know when it’s time to seriously consider surgery?

People typically start seriously considering surgery when one or more of these are true:

  • The curve is moderate to severe and continues to progress.
  • There is noticeable imbalance in the shoulders, ribs, or waist that is affecting confidence or daily life.
  • Pain, fatigue, or breathing issues are related to the curve.
  • Non-surgical options (observation, bracing, targeted therapy) are no longer effective or appropriate.

A consultation with a scoliosis specialist can help you understand where you are in that process and whether surgery is appropriate now, later, or not needed.

How has ASC evolved over time compared to earlier tethering techniques?

ASC grew out of earlier tethering and anterior techniques but has developed into a more refined and versatile approach. Surgeons have learned which curves respond best, how to safely release the spine, how much correction is appropriate, and how to apply the technique in more complex or rigid patterns.

Ongoing experience and research continue to shape indications, technical refinements, and long-term follow-up strategies.

How does ASC compare to fusion and VBT in terms of outcomes?

Comparisons depend on patient selection and study design, but key differences include:

  • Fusion: well-established, predictable straightening but with permanent loss of motion at fused levels.
  • VBT: motion-preserving, most suitable for younger, growing patients with specific curve types.
  • ASC: motion-preserving, designed to address larger and more complex curves while maintaining mobility.

Individual results vary, and high-quality, long-term data are important for understanding how each technique performs in different groups of patients. An experienced surgeon can review the most relevant information for your situation.

Why isn’t ASC offered by every spine surgeon?

ASC is a specialized technique that requires specific training, experience, and comfort with an anterior approach to the spine. Not all centers have the equipment, team structure, or volume to adopt newer, technically demanding procedures.

Surgeons often focus on techniques they know they can perform safely and effectively. As more data and experience with ASC accumulate, access may grow, but it is likely to remain concentrated in centers with a particular interest in motion-preserving scoliosis care.

Stage 2 – Who Is a Candidate for ASC?

Key Takeaways:
  • Candidates typically have flexible curves within a certain degree range.
  • Remaining spine growth may contribute to additional correction after surgery.
  • A full assessment of goals and long-term expectations is part of candidacy discussions.
ASC is best suited for patients whose curves, flexibility, and growth patterns align well with a non-metal-rod fusion scoliosis surgery approach. A detailed evaluation helps determine whether ASC offers the right blend of correction and long-term spinal mobility.
Who should consider ASC?
ASC may be considered by patients who:
  • Have a significant scoliosis curve that is unlikely to remain stable without surgery.
  • Prefer a motion-preserving approach if safely possible.
  • Have curves and spinal anatomy that allow the spine to be corrected from the front/side approach.
  • Are medically fit for surgery.
Not everyone is a candidate. Some curves, medical conditions, or anatomical factors may make fusion or other approaches more appropriate. An experienced ASC surgeon will review your imaging and health history to determine whether ASC is a realistic and safe option.
Can adults in their 30s, 40s, or 50s be candidates for ASC?
In some cases, yes. ASC was first used in younger patients, but the technique has expanded to include selected adults. The key considerations for adults include:
  • Overall disc and facet joint health.
  • How stiff or flexible the curve is.
  • Bone quality (for example, osteopenia or osteoporosis).
  • Presence of significant arthritis, stenosis, or other spinal conditions.
Adults can sometimes benefit from ASC if the spine can be safely released and corrected while preserving motion. A detailed evaluation is needed to weigh the benefits and risks versus traditional fusion.
Does disc degeneration or facet joint wear prevent ASC?
Degeneration doesn’t automatically rule out ASC, but it does influence the surgical plan. Mild to moderate disc or facet changes may still be compatible with ASC if the surgeon believes the spine can be corrected and stabilized while preserving motion. Severe degeneration, instability, or advanced arthritis may make fusion a more appropriate choice. The surgeon will look at your imaging carefully to determine how much of your pain and deformity comes from the scoliosis versus from general age-related changes.
What imaging and tests are needed to see if I qualify for ASC?
Most candidates will have:
  • Standing full-spine X-rays (front and side views).
  • Sometimes bending or traction X-rays to measure flexibility.
  • Occasionally MRI or CT scans, especially if there are neurological symptoms or concern for other spinal pathology.
The surgeon will also review your medical history, medications, and any other conditions that might affect anesthesia, healing, or bone quality.
What should out-of-state or international patients know before starting the process?
Out-of-area patients are common for specialized procedures like ASC. Typically, you’ll be asked to:
  • Submit recent X-rays and any relevant reports.
  • Fill out a detailed medical and symptom questionnaire.
  • Have a virtual or in-person consultation to discuss options.
You’ll also want to plan for travel time, pre-op testing, the hospital stay, and a short period of local recovery before returning home. The office can outline a typical timeline and help you understand how long to stay nearby after surgery.

Stage 3 – What Happens During an ASC Evaluation?

Key Takeaways:
  • Standing X-rays, flexibility films, and sometimes MRI or CT scans help assess curve behavior.
  • Physical examination evaluates posture, rotation, mobility, and any functional limitations.
  • Your surgeon reviews medical history and prior imaging to determine the safest path forward.
  • Clear discussions help align ASC expectations with your lifestyle and long-term goals.
Your evaluation is where you will meet your scoliosis surgeons. They’ll gather the details needed to design a safe, personalized plan. You’ll go through imaging, physical assessments, and in-depth conversations about your curvature, goals, and health history.
How can I best prepare for ASC surgery?
Preparation focuses on three areas: health, information, and logistics.
  • Health: follow any instructions about exercise, nutrition, and stopping or adjusting medications. If you smoke or vape, stopping ahead of surgery is strongly recommended to support healing.
  • Information: ask all your questions so you understand the plan, expected recovery, and limitations.
  • Logistics: arrange time off from school or work, line up support at home, and plan travel and lodging if you’re coming from out of town.
What happens to the discs during ASC?
In ASC, the surgeon carefully releases the discs and surrounding ligaments along the curve from the front/side of the spine. This allows the curved segment to become more flexible so it can be corrected into a straighter, more natural alignment. Unlike fusion, the goal is not to permanently stiffen the motion segment with a solid bone bridge, but to let the disc spaces remodel over time while the cord and screws guide the spine into a better shape. The technique aims to maintain some motion at those levels rather than eliminating it.
Are progesterone-only birth control pills safe before and after ASC?
Hormonal medications, including birth control, need to be reviewed with your surgical and medical team before surgery. Progesterone-only methods may be handled differently from combined estrogen-containing pills in terms of clotting risk and timing. It’s important to tell your surgeon and anesthesiologist exactly what you are taking so they can advise you on whether to pause, adjust, or continue it around the time of surgery. Do not change or stop any prescribed medication without medical guidance.
How long will my surgery take?
The length of ASC surgery varies depending on how many levels are treated, curve complexity, and whether one or more regions of the spine are addressed. Many procedures take several hours from start to finish, including positioning, anesthesia, the surgical work itself, and closing. Your surgeon can give you a more specific estimate based on your case. Families are usually updated during the procedure so they know how things are progressing.
How long will I stay in the hospital after ASC?
Most patients stay in the hospital for several days after ASC. During that time, the team focuses on:
  • Pain control and comfort.
  • Safe breathing and lung expansion.
  • Getting up and walking with assistance.
  • Monitoring for early complications.
Your discharge timing will depend on your pain levels, mobility, and how smoothly recovery is going.

Stage 4 – ASC Surgery Day: What to Expect

Key Takeaways:
  • Pre-operative preparation includes anesthesia review, marking, and safety checks.
  • The surgical team places anchors and tensions the cord to correct the curve.
  • Most patients go to a monitored recovery unit immediately after surgery.
  • Pain management, breathing exercises, and early mobility begin soon after arrival in recovery.
Surgery day is carefully structured so you know what will happen from the moment you arrive until you head to recovery. Your scoliosis surgeon and care team guide you through each step, focusing on comfort, safety, and clear communication.
What actually happens during ASC surgery?
While details vary by case, a typical ASC procedure includes:
  • General anesthesia administered by the anesthesia team.
  • A side or front-side incision to access the spine.
  • Careful release of the discs and soft tissues along the curve.
  • Placement of screws into the vertebral bodies on the convex side of the curve.
  • Attachment and tensioning of a strong cord to gradually correct the curve and rotation.
  • Verification of alignment and nerve function, followed by closure of the incision.
Throughout the procedure, the surgical team monitors your vital signs and spinal cord function to keep the process as safe as possible.
Where will my incision be and how big will it be?
ASC uses a side or front-side approach, so the incision is generally placed along the side of the chest or flank instead of straight down the back. The length depends on how many levels are being treated and whether the thoracic, lumbar, or both regions are involved. Your surgeon will usually show you where they expect to place the incision and discuss scarring, wound care, and what the area may look like over time.
How is ASC different from VBT (vertebral body tethering)?
Both ASC and VBT are front-side, motion-preserving techniques that use screws and a cord, but they are not identical. VBT is typically used in younger, growing patients with more flexible curves and often relies on growth modulation to achieve correction over time. ASC uses a more deliberate and extensive disc release to correct larger curves and more complex deformities, including significant rotation and sometimes more rigid patterns. The technique and indications have evolved to address a wider range of patients, including some older teens and adults, depending on individual anatomy and surgeon experience.
How do you monitor the spinal cord and nerves during surgery?
During ASC, neurophysiologic monitoring is commonly used. This involves techniques such as somatosensory evoked potentials (SSEPs) and motor evoked potentials (MEPs) to track how signals travel through the spinal cord and nerves. If the monitoring detects concerning changes, the team can pause, reassess, and adjust the strategy to protect neurological function. Your surgeon and anesthesiologist work together with the monitoring team throughout the procedure.

Stage 5 – Recovery Timeline After ASC Scoliosis Surgery

Key Takeaways:
  • Early recovery focuses on mobility, breathing exercises, and incision care.
  • Many patients return to school or light activities within a few weeks.
  • Restrictions lift in phases as the spine adjusts to correction and stabilization.
  • Follow-up imaging helps monitor cord tensioning and curve response over time.
Recovery unfolds in predictable stages, and most patients gain mobility quickly as healing progresses. While every timeline is different, the overall process supports a gradual, steady return to daily activities.
How is pain managed after ASC surgery?
Pain management may include a combination of:
  • Intravenous medications in the first day or two.
  • Oral pain medicines as you transition to eating and drinking normally.
  • Regional techniques or nerve blocks in some cases.
  • Non-medication strategies like positioning, ice or heat (as appropriate), and early gentle movement.
Your team will work with you to balance comfort with safety and help taper medications as your body heals.
How long does it take for the pain to significantly improve?
Everyone experiences pain differently, but many patients notice the most intense discomfort in the first few days, with steady improvement over the first 1–2 weeks. By several weeks, pain is often much more manageable and usually controlled with milder medications. Deeper healing continues over months, and it’s common to feel gradually better and more confident with movement as time goes on. Your surgeon can give you a timeline based on your specific procedure and health.
When can I go back to school, work, or daily activities?
Return to school, work, and typical daily tasks depends on your age, occupation, and how your recovery is progressing. Some people return to desk-based school or light work within a few weeks, while more physically demanding roles may require more time. Your surgeon will outline activity milestones, such as sitting for longer periods, lifting limits, and when it’s safe to resume driving, public transportation, or carrying a backpack.
What are the most common early side effects after ASC?
Common early experiences after ASC may include:
  • Pain and soreness at the incision and along the ribs or flank.
  • Tiredness or fatigue as the body recovers from anesthesia and surgery.
  • Temporary changes in appetite or sleep.
  • Muscle stiffness or guarded movement as you start walking again.
The care team will show you what is expected and what would be considered out of the ordinary so you know when to call.

Stage 6 – Long-Term Result With ASC

Key Takeaways:
  • ASC aims for durable correction that continues to evolve as the spine adapts.
  • Range of motion is generally well preserved compared to fusion.
  • Many patients return to sports and physical activity with few restrictions.
  • Your care team continues monitoring for curve stability and cord performance.
After scoliosis surgery, many patients experience lasting curve control, preserved flexibility, and a return to normal movement. Long-term follow-up visits help monitor your progress and support your spine as it settles into its new alignment.
Will I have normal mobility after ASC?

One of the main goals of ASC is to preserve as much natural motion as possible while correcting the curve. Many patients report that their daily movement feels natural and that they can bend, twist, and participate in activities more freely than they could have with a fusion.

The exact amount of motion depends on how many levels were treated, your starting curve, and your overall spinal health. Your surgeon can discuss realistic expectations based on your specific plan.

How durable are the materials used in ASC?

The screws and cord used in ASC are designed to be strong and durable under normal conditions. Over time, the spine remodels and the soft tissues adapt around the new alignment.

Cord or screw issues can occur but are not always problematic. In some cases, a cord break after the spine has remodeled does not require additional surgery if the correction and balance are maintained. Your surgeon will review how they monitor long-term stability in follow-up visits.

Does ASC help protect the discs and joints from future problems?

Because ASC aims to preserve motion and avoid fusing levels, it may reduce the risk of “adjacent segment” problems that can occur above or below a fusion. Maintaining more natural movement can be helpful for long-term spinal function.

However, no surgery can completely eliminate the effects of aging or wear and tear. The goal is to give the spine a healthier alignment and mechanics to work with over the decades ahead.

Can I return to sports and physical activities after ASC?

Many patients return to a wide range of sports and physical activities after they have fully healed, including running, swimming, non-contact sports, and other forms of exercise. High-impact or collision activities may have special considerations.

Your surgeon will give you specific clearance guidelines and timelines. The long-term aim is for you to live an active life with a stable, balanced spine.

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