Expandable vs Static Interbody Devices for Lateral Lumbar Interbody Fusion

Area of Science:

• Spine surgery
• Orthopedic surgery
• Minimally invasive spine procedures

Background:

• Lateral lumbar interbody fusion (LLIF) is a minimally invasive technique for various spinal conditions.
• Interbody devices are crucial for stabilizing discs, decompressing nerves, correcting deformities, restoring lordosis, and achieving fusion.
• Advancements include static and expandable interbody devices aimed at improving surgical outcomes.

Purpose of the Study:

• To compare the advantages and disadvantages of static versus expandable interbody devices in LLIF.
• To analyze differences in subsidence, indirect decompression, and lumbar lordosis restoration.
• To evaluate complications, patient-reported outcomes, and cost-effectiveness.

Main Methods:

• Comparative analysis of static and expandable interbody devices used in LLIF procedures.
• Review of literature focusing on radiographic and clinical outcomes.
• Assessment of specific parameters including subsidence, neural decompression, lordosis correction, complications, patient outcomes, and economic factors.

Main Results:

• Expandable devices may offer superior indirect decompression and lordosis restoration compared to static devices.
• Potential differences in subsidence rates and complication profiles exist between device types.
• Patient-reported outcomes and cost-effectiveness require detailed evaluation for each device type.

Conclusions:

• Both static and expandable interbody devices have distinct roles in LLIF, with unique benefits and drawbacks.
• The choice of device should be individualized based on patient pathology, desired outcomes, and economic considerations.
• Further research is needed to fully elucidate long-term outcomes and cost-effectiveness of expandable versus static devices in LLIF.