中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (36): 5830-5835.doi: 10.3969/j.issn.2095-4344.1959

• 脊柱植入物 spinal implant • 上一篇    下一篇

Waveflex半刚性内固定治疗腰椎间盘突出症的生物力学优势

甘东浩1,乔全来2,陈德强1,2,谭国庆2,薛海鹏2,徐展望1,2   

  1. 1山东中医药大学,山东省济南市  250355;2山东中医药大学附属医院,山东省济南市  250014
  • 出版日期:2019-12-28 发布日期:2019-12-28
  • 通讯作者: 徐展望,博士,教授,山东中医药大学附属医院,山东省济南市 250014 薛海鹏,博士,主治医师,山东中医药大学附属医院,山东省济南市 250014
  • 作者简介:甘东浩,男,1992年生,山东省枣庄市人,汉族,山东中医药大学在读博士,主要从事脊柱退行性变的基础及临床研究。
  • 基金资助:

    山东省重点研发计划项目(2015GSF118098),项目负责人:谭国庆

Biomechanical advantage of Waveflex semi-rigid internal fixation for lumbar disc herniation

Gan Donghao1, Qiao Quanlai2, Chen Deqiang1, 2, Tan Guoqing2, Xue Haipeng2, Xu Zhanwang1, 2
  

  1. 1Shandong University of Traditional Chinese Medicine, Jinan 250355, Shandong Province, China; 2Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250014, Shandong Province, China
  • Online:2019-12-28 Published:2019-12-28
  • Contact: Xu Zhanwang, MD, Professor, Shandong University of Traditional Chinese Medicine, Jinan 250355, Shandong Province, China; Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250014, Shandong Province, China Xue Haipeng, MD, Attending physician, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250014, Shandong Province, China
  • About author:Gan Donghao, Doctoral candidate, Shandong University of Traditional Chinese Medicine, Jinan 250355, Shandong Province, China
  • Supported by:

    Shandong Key Research and Development Plan Project, No. 2015GSF118098 (to TGQ)

摘要:

文章快速阅读:

文题释义:
Waveflex内固定系统:根据腰椎生理特点设计,其结构由波浪状弹性棒和椎弓根螺钉组成,弹性棒区别于普通的弹簧类结构,由2折或3折类钢板样结构组成,有屈曲10°、后伸5°的活动度动幅度,对维持人体正常活动较为重要的屈伸运动功能有较大的代偿性,且材质为半刚性,弹性模量大,受力不易形变。
青年腰椎间盘突出症:为在椎间盘轻度退变的基础上,遭受外力作用,导致应力集中部位纤维环破裂、髓核突出并压迫相应神经根,出现的以腰痛及下肢活动受限疼痛等症状为主要特征的腰椎退行性病变,临床应根据青年患者椎间盘退变较轻且活动量大的特点进行谨慎治疗。
 
摘要
背景:腰椎动态固定多为早期临床研究,但其中期疗效及力学机制分析研究较少。
目的:评价Waveflex内固定系统的临床疗效,分析其生物力学优势,为临床应用及动态固定理论研究奠定基础。
方法:回顾性分析2015年9月至2018年10月于山东中医药大学附属医院骨科行髓核摘除Waveflex半刚性内固定治疗并随访的腰椎间盘突出症患者,所有患者对治疗方案均知情同意,且得到医院伦理委员会批准。统计分析患者术前、术后及末次随访的目测类比评分和Oswestry功能障碍指数、腰椎前凸角、椎间隙高度、椎间孔高度和椎间隙退变UCLA分级,评价置入半刚性内固定的临床疗效。构建完整及置入Waveflex半刚性内固定腰椎模型,进行有限元分析,评价Waveflex半刚性内固定模型的生物力学性能,结合临床统计观察验证其安全、有效性。
结果与结论:①Waveflex半刚性固定可有效改善患者临床症状,维持腰椎稳定性和活动度,临床疗效肯定;②Waveflex系统可承担较大应力,有效减轻手术节段椎间盘应力,延缓腰椎退变;③总的来说,Waveflex半刚性内固定既可维持固定节段的稳定性,又有一定的活动度,可有效减缓固定节段退变。

ORCID: 0000-0001-5741-3832(甘东浩)

关键词: 腰椎间盘突出症, Waveflex, 半刚性内固定, 腰椎稳定性, 活动度, 有限元分析, 应力

Abstract:

BACKGROUND: Lumbar dynamic fixation is mostly studied in early clinical studies, but there are few studies on the efficacy and mechanical mechanism of mid-stage fixation.

OBJECTIVE: To evaluate the clinical efficacy of Waveflex internal fixation system and analyze its biomechanical advantages, so as to lay a foundation for clinical application and theory research of dynamic fixation.
METHODS: Retrospective analysis was performed in patients who underwent nucleus pulposus excision and semi-rigid internal fixation in the Department of Orthopedics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine from September 2015 to October 2018. All patients signed informed consent. This study was approved by the Ethics Committee of Affiliated Hospital of Shandong University of Traditional Chinese Medicine, China. The corresponding subjective function and objective imaging indexes of the patients in this group before, after and at the last follow-up were statistically analyzed to evaluate the clinical efficacy of implantation of semi-rigid internal fixation. The complete and implanted semi-rigid internal fixation model of the lumbar spine was constructed and finite element analysis was performed to evaluate the biomechanical properties of the Waveflex semi-rigid internal fixation model. The safety and effectiveness were verified by clinical statistical observation.
RESULTS AND CONCLUSION: (1) Waveflex semi-rigid fixation can effectively improve the symptoms of patients, maintain lumbar stability and mobility, and the clinical effect is positive. (2) The system can construct the ladder stress distribution, effectively reduce the stress of the surgical segment, and delay lumbar degeneration. (3) In general, the Waveflex semi-rigid internal fixation can maintain the stability of the fixed segment and has a certain range of motion, which can effectively slow down the degeneration of the fixed segment.

Key words: lumbar disc herniation, Waveflex, semi-rigid internal fixation, lumbar stability, mobility, finite element analysis, stress

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