Vertebral body changes after continuous spinal distraction in scoliotic children

Area of Science:

• Pediatric Orthopedics
• Spinal Surgery
• Medical Imaging

Background:

• Growth-friendly spinal implants (GFSI) are used for scoliosis in children as a temporary measure before definitive spinal fusion.
• While GFSI effectively controls deformity, its impact on vertebral shape and morphology remains unclear.
• Understanding these effects is crucial for optimizing pediatric spinal deformity management.

Purpose of the Study:

• To assess the effect of GFSI with continuous distraction on vertebral body shape and volume in children with Spinal Muscular Atrophy (SMA).
• To compare vertebral morphology in SMA children treated with GFSI to a control group of untreated SMA patients.
• To investigate the long-term consequences of GFSI on spinal development.

Main Methods:

• Prospective study comparing two cohorts of SMA patients.
• Cohort I: 19 patients without prior scoliosis surgery.
• Cohort II: 24 patients with 4.5 years of GFSI treatment, assessed via radiography and CT 3D volume rendering.

Main Results:

• Patients treated with GFSI showed significantly decreased vertebral body depth and volume compared to controls.
• This reduction was most pronounced in the lower thoracic and lumbar spine.
• Vertebral body height and pedicle size remained unchanged between groups.

Conclusions:

• GFSI treatment leads to reduced vertebral body volume and depth in pediatric scoliosis patients.
• Altered vertebral morphology, especially reduced depth, is a key finding in the GFSI-treated group.
• These morphological changes should be considered in the management of previously treated scoliotic SMA children.