Dynamic lumbar pedicle fixation in repair of lumbar degenerative disease: K-Rod elastic rod, universal elastic rod and Dynesys system

doi:10.3969/j.issn.2095-4344.2014.44.011

Abstract

Abstract:

BACKGROUND: Discectomy and pedicle fixation fusion are golden standard to repair lumbar degenerative disease, but the treatment would induce other complications such as degeneration of adjacent segments or severer pre-existing spinal degeneration. For the problem of lumbar fusion and fixation, lumbar elastic fixation has recently been a hot focus.

OBJECTIVE: To evaluate the short-term effectiveness of dynamic lumbar pedicle fixation in repair of lumbar spinal stenosis and lumbar disc herniation.

METHODS: From December 2010 to December 2012, 62 cases of lumbar spinal stenosis and lumbar disc herniation treated with lumbar dynamic system were included. The involved segments included: 5 cases at L₃/₄, 20 cases at L_4/5, 20 cases at L₅S₁, 6 cases at double segment L_3/4and L_4/5,8 cases at double segment L₄/₅, L₅S₁, 3 cases at L₃/₄ and L₅S₁. There were 34 males and 28 females with an average age of 50.8 years (range 32 to 72 years). According to different fixation systems, they were assigned to three groups: general dynamic lumbar fixation system in 17 cases, K-Rod posterior dynamic stabilization system in 28 cases, and Dynesys system in 17 cases. The follow-up time was from 24 to 48 months. Evaluation indexes included visual analogue scale, Oswestry disability index, imaging analysis and excellent and good rate of curative effects.

RESULTS AND CONCLUSION: Compared with before treatment, visual analogue scale score and Oswestry disability index were significantly improved at 6 months after treatment and final follow-up (P < 0.01). No apparent changes were detected in the length of inserted segments and adjacent segments before treatment and during final follow-up. There were no significant differences in the excellent and good rate in each group after treatment (P > 0.05). These data indicated that the lumbar dynamic system was an effective option for lumbar disc herniation and spinal stenosis. Although there are some differences in the structure of three kinds of flexible fixation, no obvious difference in early therapeutic effects was detected. Long-term effects deserve further investigations.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

全文链接：

Key words: lumbar vertebrae, internal fixators, spinal stenosis, intervertebral disk displacement, follow-up studies

CLC Number:

R318

Liu Tao, Wang Zhen-jiang, Chen Fan, Zhang Da-peng, Guo Ning-guo, Ma Fang-nan, Feng Ji-chuan, Qiang Xiao-jun . Dynamic lumbar pedicle fixation in repair of lumbar degenerative disease: K-Rod elastic rod, universal elastic rod and Dynesys system[J]. Chinese Journal of Tissue Engineering Research, 2014, 18(44): 7111-7116.

Figures/Tables 6

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