Stability of posterior dynamic stabilization system fixation for thetreatment of lumbar disc herniation

doi:10.3969/j.issn.2095-4344.2013.22.019

Abstract

Abstract:

BACKGROUND: Posterior dynamic stabilization system can be used to maintain the vertebral motion segment and reduce the degeneration of vertebral body adjacent segment.
OBJECTIVE: To investigate the efficacy and stability of posterior dynamic stabilization system for the treatment of lumbar disc herniation.
METHODS: Eighteen patients with degenerative lumbar disease and treated with posterior decompression and posterior dynamic stabilization system internal fixation in the Department of Orthopedics, Beijing Shijitan Hospital Affiliated to Capital Medical University from February 2009 to June 2011 were selected, included 11 male patients and seven female patients, the age was 32-67 years old and averaged in 45 years old. The visual analogue scale score was used for pain assessment and the Oswestry disability index was used for clinical evaluation, the flexion and hyperextension X-ray films were used to measure the activity of lumbar intervertebral disc and the adjacent intervertebral disc after posterior dynamic stabilization system fixation.
RESULTS AND CONCLUSION: All the patients were followed-up for 20-45 months, averaged in 38 months. The visual analogue scale score before posterior dynamic stabilization system fixation was 7.1-9.4 points, and averaged 8.3 points, the postoperative score was 0-3.1 points, averaged 1.5 points, the improvement rate of visual analogue scale score was 81.5%. The Oswestry disability index before posterior dynamic stabilization system fixation was 35-81 points (average 60 points) and 0-45 points after fixation (average 22 points), and the improvement rate of Oswestry disability index was 63.3%. There was one case of loosening after posterior dynamic stabilization system fixation, one case had lower extremity nerve symptoms transient increasing and relieved after 3 months. The average range of motion after fixation was 5.3°. The posterior dynamic stabilization system for the treatment of lumbar disc herniation can maintain the range of motion and stability of the fixed segment with well recovered medium-term clinical symptoms, suggesting that this system is an alternative non-fusion fixation method for the treatment of lumbar disc herniation, but the effect on the adjacent segment still need to be identified with long-term follow-up

Key words: bone and joint implants, academic discussion of bone and joint, posterior dynamic stabilization system, non-fusion, lumbar disc herniation, lumbar degeneration, implants, spinal stenosis, spondylolisthesis, pain, spinal fusion, pedicle screw, adjacent segment degeneration, biomechanics

CLC Number:

R318

Ding Li-xiang, Chen Ying-chun, Zhang Gen-ai, Yao Qi, Hou Yu. Stability of posterior dynamic stabilization system fixation for thetreatment of lumbar disc herniation[J]. Chinese Journal of Tissue Engineering Research, 2013, 17(22): 4123-4129.

Figures/Tables 2

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