Dynesys® dynamic stabilization outcomes in degenerative spine surgery.

Area of Science:

• Spine surgery
• Orthopedics
• Neurosurgery

Background:

• Dynesys® is a dynamic stabilization device for the lumbar spine.
• Previous studies have evaluated its efficacy, but larger cohorts with longer follow-up are needed.

Purpose of the Study:

• To analyze the clinical and radiological outcomes of Dynesys® posterior stabilization.
• To evaluate complications and revision rates in a large patient cohort.

Main Methods:

• Retrospective study of 136 patients who underwent Dynesys® stabilization between 2009 and 2016.
• Inclusion of 5 etiologies: disc herniation, lumbar stenosis, adjacent segment disease (ASD) revision, spondylolisthesis, and scoliosis.
• Clinical and radiological assessments with a minimum 2-year follow-up.

Main Results:

• Mean follow-up of 46 months. Postoperative VAS scores: lumbar 3.07, radicular 3.01; ODI score: 31.8%.
• Adjacent segment disease (ASD) rate was 16.2%, overall revision rate was 11.8%, and screw loosening occurred in 1.5%.
• Favorable outcomes, lower ASD, and revision rates were observed in spondylolisthesis and disc herniation groups.

Conclusions:

• Dynesys® dynamic stabilization offers good long-term clinical and radiological outcomes.
• It demonstrates a lower complication rate compared to lumbar fusions.
• Degenerative spondylolisthesis is identified as a primary indication for Dynesys® stabilization.