A classification of growth friendly spine implants.

Area of Science:

• Pediatric Orthopedics
• Biomedical Engineering
• Spinal Surgery

Background:

• Spinal deformities in children require implants to manage growth and correct alignment.
• Existing spinal implants aim to minimize deformity while maximizing spinal and thoracic growth.

Purpose of the Study:

• To establish a classification system for growth-friendly spinal implants.
• To provide a common language for researchers and clinicians.
• To facilitate comparative studies on spinal deformity correction.

Main Methods:

• Categorization of growth-friendly spinal implants based on corrective forces.
• Description of three main categories: distraction-based, compression-based, and guided growth systems.
• Examples provided for each category, including growing rods, vertebral staples, tethers, Luque trolley, and Shilla systems.

Main Results:

• Distraction-based systems use distractive forces (e.g., growing rods).
• Compression-based systems use compressive forces to inhibit convex growth (e.g., vertebral staples).
• Guided growth systems anchor vertebrae to rods, allowing longitudinal growth (e.g., Luque trolley).

Conclusions:

• Each system presents unique benefits and drawbacks.
• Understanding the principles of each system aids in patient treatment selection.
• A standardized classification promotes comparative research in pediatric spinal deformity.