中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (9): 1315-1321.doi: 10.3969/j.issn.2095-4344.2016.09.015

• 骨与关节图像与影像 bone and joint imaging • 上一篇    下一篇

MRI辅助髓核容积测定评价单侧椎弓螺钉置入并椎间融合对邻近节段的影响

张红军,王群波,黄文强,李 波,余 雨,邵高海   

  1. 重庆医科大学附属永川医院骨科,重庆市 400016
  • 收稿日期:2015-12-13 出版日期:2016-02-19 发布日期:2016-02-19
  • 通讯作者: 邵高海,主任医师,教授,硕士生导师,重庆医科大学附属永川医院骨科,重庆市 400016
  • 作者简介:张红军,男,1985年生,安徽省阜阳市人,汉族,重庆医科大学在读硕士,主要从事脊柱外科方面的研究。
  • 基金资助:

    重庆市卫计委面上项目(2011-2-274)

MRI measurement of nucleus pulposus volume to assess the influence of unilateral pedicle screw fixation with an interbody fusion cage on adjacent segment

Zhang Hong-jun, Wang Qun-bo, Huang Wen-qiang, Li Bo, Yu Yu, Shao Gao-hai   

  1. Department of Orthopedics, Yongchuan Hospital, Chongqing Medical University, Chongqing 400016, China
  • Received:2015-12-13 Online:2016-02-19 Published:2016-02-19
  • Contact: Shao Gao-hai, Chief physician, Professor, Master’s supervisor, Department of Orthopedics, Yongchuan Hospital, Chongqing Medical University, Chongqing 400016, China
  • About author:Zhang Hong-jun, Studying for master’s degree, Department of Orthopedics, Yongchuan Hospital, Chongqing Medical University, Chongqing 400016, China
  • Supported by:

    the General Program of Chongqing Municipal Planning Commission, No. 2011-2-274

摘要:

文章快速阅读:

文题释义:

单侧椎弓根螺钉置入内固定并cage植骨融合:不仅能够使脊柱获得即刻固定的稳定性,同时可降低固定节段的刚度。其优点在于保留健侧骶棘肌、椎板、上下关节突及棘上韧带及棘间韧带,对脊柱后柱稳定起到最大的保护作用,同时减少创伤、出血及手术时间,降低了修复后感染的风险。
髓核体积MRI测量:研究证实髓核的MRI信号与其水分含量呈线性关系,MRI信号强度的变化能在一定程度上反映髓核内结合水分含量的改变,从而可以根据MRI信号变化评估髓核的退变程度。

 

背景:大量的生物力学实验和临床应用研究表明,单侧椎弓根螺钉置入内固定并cage椎间融合不仅能够使脊柱获得即刻固定的稳定性,同时可降低固定节段的刚度。然而目前其对邻近节段椎间盘髓核容积变化的影响还未见报道。
目的:应用MRI辅助髓核容积测定评价单侧椎弓根螺钉置入内固定并cage椎间植骨融合修复部分腰椎退变性疾病对固定融合邻近节段椎间盘退变的影响。
方法:对34例腰椎间盘脱出症患者行单侧单节段椎弓根螺钉置入内固定加椎间cage植骨融合治疗,其中L4-5节段16例,男9例,女7例。L5-S1节段18例,男10例,女8例。术后18个月取出内固定器,随访24-36个月。应用MRI技术,在T2加权像上分别在治疗后6,12,18,30个月测量头侧椎间隙髓核的前后径和宽度,正中矢状位测量髓核高度;X射线片上利用角平分线法测量头侧椎间隙高度。据治疗后髓核体积及椎间隙高度变化评价单侧椎弓根螺钉固定技术对固定邻近节段头侧椎间盘退变的影响。

结果与结论:①固定L4-5节段临近头侧L3-4节段髓核体积变化:治疗后30个月与治疗前相比较,男性患者有所减少,但差异无显著性意义(P=0.139);而女性患者髓核体积较治疗前有所增加,但差异无显著性意义(P=0.143)。②固定L5-S1节段临近头侧L4-5节段髓核体积变化:治疗后30个月与治疗前相比,男性患者略有减少,但差异无显著性意义(P=0.096);而女性患者与治疗前相比,治疗后6,12,18,30 个月髓核体积均略有增加,但差异无显著性意义(P > 0.05)。③固定L4-5节段临近头侧L3-4节段椎间隙变化:治疗后30个月,男女性患者椎间隙高度均较治疗前略有减少,但差异无显著性意义(P > 0.05)。④固定L5-S1节段临近头侧L4-5节段椎间隙变化:治疗后30个月随访时,男女性患者椎间隙高度均较治疗前略有减少,但差异无显著性意义(P > 0.05)。⑤提示应用单侧单节段椎弓根螺钉置入内固定结合cage椎间植骨融合修复部分腰椎退性性疾病,可对固定融合邻近节段椎间盘退变起有一定的预防作用。 

ORCID: 0000-0001-5084-2386 (邵高海)

关键词: 骨科植入物, 脊柱植入物, 邻近节段, MRI, 角平分线法, 单侧固定, 髓核容积, 椎间隙高度, 椎间盘退变

Abstract:

BACKGROUND: A large number of biomechanical studies and clinical application research showed that unilateral pedicle screw fixation with a single cage can not only make the spine to obtain immediate stability, and also reduces the fixed segment stiffness. However, there is not related research on the change of adjacent segment disc nucleus pulposus volume with unilateral pedicle screw.
OBJECTIVE: To evaluate the effects of unilateral pedicle screw fixation with a single cage on adjacent segment degeneration for treating lumbar degenerative disease with MRI measurement of lumbar nucleus pulposus volume. 
METHODS: A total of 34 patients with lumbar disc herniation were treated by posterior lumbar interbody fusion with unilateral pedicle screw fixation with a single cage insertion. There were L4-5 segment in 16 patients (9 males and 7 females) and L5-S1 segment in 18 patients (10 males and 8 females). The fixator was taken out at 18 months after surgery. They were followed up for 24 to 36 months. With MRI, the transverse diameter and sagittal diameter of the nucleus pulposus were measured by using T2-weighted images at 6, 12, 18, 30 months after treatment, while the nucleus pulposus height was measured by middle sagittal position. Cephalic intervertebral height was measured with angular bisector method on X-ray films. Effects of unilateral pedicle screw fixation on cephalic intervertebral disc degeneration were evaluated according to nucleus pulposus volume and the intervertebral space height. 
RESULTS AND CONCLUSION: (1) Nucleus pulposus volume at cephalic L3-4 on the fixed L4-5 segment was reduced in male patients after 30 months of treatment compared with pre-treatment (P=0.139), but increased in female patients (P=0.143). (2) Nucleus pulposus volume at L4-5 near to fixed L5-S1 segment was slightly reduced in male patients after 30 months of treatment (P=0.096); nucleus pulposus volume was slightly increased in female patients after 6, 12, 18 and 30 months of treatment (P > 0.05). (3) Disc space height at cephalic L3-4 near to L4-5 segment was diminished in male and female patients at 30 months of treatment (P > 0.05). (4) Disc space height at cephalic L4-5 near to L5-S1 segment was slightly reduced in male and female patients compared with pre-treatment (P > 0.05). (5) Unilateral pedicle screw with a single cage could effectively prevent adjacent segment degeneration in treatment of partial lumbar intervertebral degenerative disease.