Clinical Study of a New Transpedicular Nonfusion Posterior Dynamic Stabilization System for Treating Herniated Lumbar Intervertebral Disks

In this study, we evaluated the 12-month clinical outcomes of patients treated with the K-Rod, a pedicle-based dynamic stabilization system. Patient participation was based on the presence of a herniated lumbar intervertebral disk complicated with endplate osteochondritis at L4-L5 or L5-S1. The clinical outcome at each assessment was assessed by Visual Analogue Scale to measure back pain, and the Oswestry Disability Index and range of motion to measure functional status preoperatively and postoperatively. Thirty-three patients (20 men and 13 women) with a mean age of 45.5 years were included. The mean Visual Analogue Scale score improved by 77% and the mean Oswestry Disability Index score improved by 77% from preoperative to postoperative. The range of motion results were statistically significant in the disease segment, but were not significant in adjacent segments. Nonfusion posterior dynamic stabilization using the K-Rod system is effective in improving clinical outcome, with sustained medium-term clinical improvements. Further observation is needed to evaluate its long-term effects.
Source: Neurosurgery Quarterly - Category: Neurosurgery Tags: Original Articles Source Type: research