Segmental spinal instrumentation: a preliminary report of 40 consecutive cases

Area of Science:

• Orthopedic Surgery
• Spinal Deformity Correction
• Biomedical Engineering

Background:

• Complex scoliosis, particularly neurogenic scoliosis, presents significant surgical challenges.
• Traditional Harrington instrumentation has limitations in achieving optimal spinal stability.

Purpose of the Study:

• To compare the stability and complication rates of segmental instrumentation versus conventional Harrington instrumentation in complex scoliosis patients.
• To evaluate the impact of surgical technique and postoperative immobilization on outcomes.

Main Methods:

• Retrospective analysis of two patient groups undergoing spinal fusion for complex scoliosis.
• Group A: 30 patients with Harrington instrumentation and segmental wiring, with postoperative immobilization.
• Group B: 10 patients with double L rod instrumentation, with or without postoperative immobilization.

Main Results:

• Segmental instrumentation demonstrated superior instrument stability, especially without sacral fixation.
• Pseudarthrosis was more common in cases with posterior element deficiency.
• Transient neurologic complications, primarily nerve root contusion, occurred in both groups.

Conclusions:

• Segmental instrumentation significantly enhances stability compared to conventional Harrington instrumentation for complex scoliosis.
• The increased stability must be balanced against a potentially higher risk of neurologic complications.