Vertebral Body Tethering: Rationale, Results, and Revision

Area of Science:

• Orthopedics
• Spinal Surgery
• Biomedical Engineering

Background:

• Adolescent idiopathic scoliosis (AIS) is a spinal deformity often treated with posterior spinal fusion (PSF).
• Vertebral body tethering (VBT) presents a nonfusion alternative for skeletally immature patients.
• VBT aims to preserve spinal motion and mitigate long-term complications associated with PSF.

Purpose of the Study:

• To evaluate vertebral body tethering as a surgical correction technique for adolescent idiopathic scoliosis.
• To compare VBT outcomes and complications with the current standard of care, posterior spinal fusion.
• To identify areas for future research in VBT, including optimal timing and application in more mature patients.

Main Methods:

• Retrospective analysis of case series involving vertebral body tethering.
• Assessment of spinal curve correction rates and variability in outcomes.
• Evaluation of complication profiles, including tether integrity and overcorrection.

Main Results:

• Vertebral body tethering achieved correction rates up to 70% in recent studies.
• Outcomes demonstrated greater variability compared to posterior spinal fusion.
• Key complications included tether breakage and overcorrection, alongside approach-related issues.

Conclusions:

• Vertebral body tethering is a viable alternative to PSF for select AIS patients, potentially preserving motion.
• Further research is needed to refine surgical timing, assess long-term efficacy, and explore its use in skeletally mature individuals.
• Understanding the distinct complication profile of VBT is crucial for patient selection and surgical planning.