How Do Expandable Cages Hold Up in Spine Surgery?

The Rise of Expandable Interbody Cages

Expandable interbody cages are becoming increasingly popular in spine surgery. These devices help restore disc height and alignment with minimally invasive procedures. However, their long-term durability remains a concern among medical professionals.

Study Insights: Short-Term Gains, Long-Term Concerns

A recent study involving 40 patients who underwent lower back surgery with these cages revealed some compelling findings:

• Immediate Success:

• Post-surgery, the cages significantly improved disc height by approximately 8.6 millimeters.

• Long-Term Challenges:
• 3-Month Mark: 36% of cases showed signs of subsidence (cage sinking into the bone).
• 12-Month Mark: The incidence of subsidence increased to 45.5%.
• Despite the subsidence, no additional surgeries were required.
• The overall spine curvature remained stable, even as disc height decreased.

Conclusion: A Balanced Perspective

While expandable interbody cages offer promising short-term benefits, their long-term efficacy is tempered by the risk of subsidence. The study suggests that careful patient selection and precise implantation techniques are crucial to minimizing these risks.