Dynesys® dynamic stabilization outcomes in degenerative spine surgery

Dynesys (R) is a dynamic device used for posterior stabilization of the lumbar spine. The objective of this study was to analyze the clinical and radiological outcomes at a 2-year minimum follow-up. In this retrospective study, patients operated between 2009 and 2016 with Dynesys' stabilization were included. 5 different etiologies were included: disc herniation, lumbar stenosis, revision for adjacent segment disease (ASD), spondylolisthesis, and scoliosis. Clinical and radiological evaluations were performed. Postoperative complications and revisions were recorded. 136 patients were included: 34 for lumbar spinal stenosis, 19 for disc herniation, 29 degenerative spondylolisthesis, 41 revisions for ASD. and 13 scoliosis. Mean age was 64.8. Average clinical follow -up was 46 months. Postoperative clinical results showed a mean lumbar VAS of 3.07, a mean radicular VAS of 3.01 and an ODI score of 31.8%. The ASD rate was 16.2%, and overall revision rate was 11.8%. 2 cases (1.5%) of screw loosening were identified. Clinical outcomes, ASD rate and revision rate were more favorable in the spondylolisthesis and disc herniation groups. This study has one of the largest Dynesys (R) cohort in literature. Spinal dynamic stabilization by Dynesys (R) presents good long-term clinical and radiological outcomes with a loll er rate of complications than previously published cohorts and lumbar fusions. Best indications seem to be degenerative spondylolisthesis.

Automated summary

This study examined the clinical and radiological outcomes of Dynesys(R) in posterior stabilization of the lumbar spine, finding more favorable results in terms of clinical outcomes, ASD rate, and revision rate in the spondylolisthesis and disc herniation groups. In long-term follow-up, Dynesys(R) dynamic spinal stabilization showed good clinical and radiological outcomes.