NFlex Dynamic Stabilization System : Two-Year Clinical Outcomes of Multi-Center Study

Area of Science:

• Spine surgery
• Orthopedic biomechanics
• Degenerative spine disease

Background:

• Pedicle-based dynamic stabilization systems aim to control spinal motion and reduce fusion drawbacks.
• The NFlex system is a specific type of pedicle-based dynamic stabilization device.

Purpose of the Study:

• To analyze the two-year clinical outcomes of the NFlex pedicle-based dynamic stabilization system.
• To evaluate the effectiveness of NFlex in improving pain and functional status in patients with various degenerative spinal conditions.

Main Methods:

• A retrospective study involving 72 patients across five sites using the NFlex system.
• 65 patients completed a two-year follow-up, assessed using Visual Analogue Scale (VAS) for pain and Oswestry Disability Index (ODI) for function.
• Radiographic assessment for instrumentation failure or screw loosening was also performed.

Main Results:

• A statistically significant improvement in mean VAS score (8.1 to 3.8) and ODI score (44.5 to 21.8) was observed.
• Mean follow-up was 25.6 months, with sustained clinical improvement noted.
• Three implant-related complications occurred during the study period.

Conclusions:

• The NFlex system demonstrates effectiveness in enhancing pain relief and functional capacity in the long term.
• Sustained clinical benefits were observed up to two years post-implantation.
• Appropriate patient selection is crucial for considering NFlex as a viable alternative to rigid spinal fusion.