Surgical expertise · full-spine
Adult Spinal Deformity Correction
Adult spinal deformity is an abnormal curvature or loss of balance of the spine in adulthood. Correction aims to restore the spine’s alignment — particularly its forward–backward (sagittal) balance — and relieve pain and disability.
Adult spinal deformity is an abnormal curvature or loss of balance of the spine that occurs or becomes troublesome in adulthood. It includes adult scoliosis, excessive forward curvature, and — very importantly — loss of the spine’s normal side-on alignment, which causes the trunk to lean forward. Unlike deformity in children, adult deformity is often accompanied by degeneration, pain, and nerve compression, and the priority is usually to relieve symptoms and restore balance rather than simply to straighten a curve.
What it is
Adult spinal deformity correction realigns the spine and stabilises it so that the body can be held upright comfortably. A central aim is to restore sagittal balance — the side-on alignment that keeps the head centred over the pelvis with the least muscular effort. When sagittal balance is lost, patients lean forward, tire quickly, and develop back and leg pain; restoring it is one of the most important determinants of a good outcome.
Correction is achieved with rods and screws, supported by bone graft to achieve fusion. Where the deformity is rigid, osteotomies — controlled removals of wedges of bone — are used to hinge the spine back into alignment.
Who is a candidate? (Indications)
Surgery is considered for carefully selected adults, typically those with:
- Persistent, significant pain and disability not controlled by non-surgical measures
- A deformity that is progressing over time
- Loss of sagittal balance, with a forward-leaning posture and difficulty standing upright
- Nerve compression causing leg pain, weakness, or numbness
- Deformity that significantly limits daily function and quality of life
General health, bone quality, and the balance of risk and benefit are all carefully weighed, particularly in older patients.
How it is performed
The operation is planned in detail, usually with full-length standing X-rays and increasingly with three-dimensional imaging. In broad terms:
- Overall alignment and pelvic parameters are measured to plan how much correction is needed.
- The spine is exposed, and screws and rods are placed to control the segments being realigned.
- Where the deformity is rigid, one or more osteotomies remove controlled wedges of bone.
- The spine is realigned to restore balance, particularly in the sagittal plane.
- The correction is held with rods and screws, and bone graft is added to achieve fusion.
Continuous spinal-cord and nerve monitoring is used to protect neurological function, and navigation may be used to guide accurate placement of implants.
Benefits and risks
The benefits of correction are a more balanced, upright posture, relief of pain caused by the deformity and any nerve compression, and prevention of further progression. Against these must be weighed the real risks of major spinal surgery: injury to nerves or the spinal cord, significant blood loss, infection, implant problems, incomplete correction, and the need for revision surgery. Risk is greater in older patients and those with fragile bone. These factors are discussed openly so that the expected benefit clearly justifies the risk for each individual.
Alternatives
Many adults with spinal deformity are managed without surgery: physiotherapy and exercise to build strength and endurance, pain management, targeted injections, and regular monitoring of the curve. Where bone is fragile, treating osteoporosis is an important part of care. A specialist assessment helps determine whether surgery is genuinely necessary and, if so, how extensive it needs to be.
Dr. Garg’s approach & experience
Dr. Garg is Principal Director & Head, Orthopaedics & Spine at Max Hospital, Delhi, and a former Professor at AIIMS New Delhi, with more than 325 peer-reviewed publications and a sustained body of work in spinal deformity. For the most severe and rigid deformities, he developed a Modified Posterior Vertebral Column Resection (Modified PVCR), published in The Spine Journal in 2020.
His research also includes robotic and navigated spine surgery, 3D-printed patient-specific osteotomy and drill guides, and AI/ML-based deformity analysis — work directed at planning and performing complex correction more accurately and reproducibly.
When to seek a specialist opinion
A specialist assessment is appropriate for adults with a worsening curve, a forward-leaning posture that is hard to correct, or persistent back and leg pain that limits daily life. Leg weakness, numbness, balance problems, or changes in bladder or bowel function warrant prompt review.
Frequently asked questions
What is adult spinal deformity?
It is an abnormal curvature or loss of balance of the spine that occurs or becomes symptomatic in adulthood. It includes adult scoliosis (a sideways curve), kyphosis (excessive forward curve), and loss of the spine’s normal sagittal alignment, where the trunk leans forward and the head is no longer centred over the pelvis.
What is sagittal balance, and why does it matter?
Sagittal balance describes how the spine is aligned when viewed from the side, so that the head sits centred over the pelvis with minimal muscular effort to stand upright. When this balance is lost, patients lean forward, tire quickly, and develop pain. Restoring sagittal balance is one of the most important goals of adult deformity correction.
Does adult spinal deformity always need surgery?
No. Many adults are managed with physiotherapy, pain management, injections, and monitoring. Surgery is considered when symptoms are significant and persistent, when the deformity is progressing, or when there is nerve compression — and when the expected benefit justifies the risks of a major operation.
What is an osteotomy?
An osteotomy is the controlled removal of a wedge of bone from the spine, allowing the surgeon to hinge the spine into better alignment. Different types remove different amounts of bone; the choice depends on how much correction is needed and how rigid the deformity is. Rigid adult deformities often require one or more osteotomies.
How is the surgery planned?
Planning typically uses full-length standing X-rays to measure overall alignment, alongside MRI or CT and, increasingly, three-dimensional imaging. Careful measurement of spinal and pelvic parameters guides how much correction is needed and where.
What are the main risks?
Adult deformity surgery is major surgery and carries meaningful risks: injury to nerves or the spinal cord, significant blood loss, infection, implant problems, incomplete correction, and the need for revision surgery, as well as the general risks of prolonged anaesthesia. Risk is higher in older patients and those with fragile bone, and is weighed individually.
How long is recovery?
Recovery is gradual. Most patients are mobilised within days, but returning to normal activity takes months as strength returns and the fusion consolidates. The surgical team provides an individualised timeline.