OBJECTIVE Minimally invasive dorsal cervical decompression (miDCD) has been reported as a novel alternative to open dorsal decompression techniques such as laminectomy, laminoplasty, or laminectomy and fusion. Only limited data have been presented regarding the effects of a minimally invasive approach on cervical motion and alignment. The object of the current study is to provide a more comprehensive analysis of radiographic outcomes following miDCD. PATIENTS AND METHODS Thirty-five patients who had undergone miDCD for myelopathy were included. Exclusion criteria included prior cervical spine surgery, prior cervical spine fracture, fusion of the cervical spine during miDCD, and/or acute spinal cord injury. Analysis of x-rays included the following data elements: degrees of flexion, degrees of extension, and total range of motion; C2-C7 angle as a measure of cervical lordosis; C2-C7 sagittal vertical axis; effective lordosis; and C7 slope. Patient reported outcome measures included neck Visual Analog Score (VAS), Neck Disability Index (NDI), SF-12 Physical Component Score (PCS), SF-12 Mental Component Score (MCS), Nurick score, and modified Japanese Orthopedic Association Myelopathy scale (mJOA). RESULTS Pre-operative to post-operative comparisons of all radiographic parameters - including total range of motion, C2-C7 Cobb angle, C2-C7 sagittal vertical axis, effective lordosis, and C7 slope angle - remained stable. Several clinical outcomes demonstrated statistical improvement, namely neck VAS, Nurick score, mJOA, NDI, and SF-12 PCS. CONCLUSIONS miDCD can maintain cervical range of motion and alignment better than traditional laminectomy or laminoplasty techniques.

中文翻译：

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脊髓病微创背侧颈椎减压术对脊柱排列及活动度的影响

目的 微创颈椎背侧减压术 (miDCD) 已被报道为开放式背侧减压技术（如椎板切除术、椎板成形术或椎板切除术和融合术）的一种新型替代方法。关于微创方法对颈椎运动和对齐的影响，仅提供了有限的数据。当前研究的目的是对 miDCD 后的放射学结果进行更全面的分析。患者和方法 纳入了 35 名因脊髓病接受 miDCD 的患者。排除标准包括先前的颈椎手术、先前的颈椎骨折、miDCD 期间颈椎融合和/或急性脊髓损伤。X 射线分析包括以下数据元素：屈曲度数、伸展度数和总运动范围；C2-C7 角作为颈椎前凸的量度；C2-C7矢状纵轴；有效的脊柱前凸；和 C7 斜率。患者报告的结果测量包括颈部视觉模拟评分 (VAS)、颈部残疾指数 (NDI)、SF-12 身体成分评分 (PCS)、SF-12 精神成分评分 (MCS)、Nurick 评分和改良的日本骨科协会脊髓病量表(mJOA)。结果 所有影像学参数的术前与术后比较 - 包括总运动范围、C2-C7 Cobb 角、C2-C7 矢状垂直轴、有效前凸和 C7 倾斜角 - 保持稳定。几个临床结果表明统计改善，即颈部 VAS、Nurick 评分、mJOA、NDI 和 SF-12 PCS。结论 与传统的椎板切除术或椎板成形术相比，miDCD 可以更好地保持颈椎的运动范围和对齐。