ArticleBMC musculoskeletal disorders2023
Effect of preoperative dynamic cervical sagittal alignment on the loss of cervical lordosis after laminoplasty.
Article in BMC musculoskeletal disorders, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed, 13 citations in OpenAlex.
- Is preoperative cervical range of motion associated with cage subsidence after anterior cervical discectomy and fusion?European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026Article
- Preoperative carotid ultrasound in degenerative cervical myelopathy: from routine screening to selective use.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026Article
- Radiological differences between patients with degenerative cervical myelopathy according to different levels of maximum compression.BMC musculoskeletal disorders · 2026Article
- How does cervical sagittal profile change after the spontaneous compensation of global sagittal imbalance following one- or two-level lumbar fusion.BMC musculoskeletal disorders · 2024Article
- Change of cervical flexion range of motion influences postoperative sagittal alignment of the cervical spine after laminoplasty.BMC surgery · 2024Article
- Current Concepts of Cervical Spine Alignment, Sagittal Deformity, and Cervical Spine Surgery.Journal of clinical medicine · 2024Review
- Risk factors for cervical kyphotic deformity following laminoplasty in degenerative cervical myelopathy: A systematic review and meta-analysis.Journal of craniovertebral junction & spineReview
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5 authors at 2 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
purposeCervical laminoplasty (CLP) is a developed surgical procedure for the treatment of cervical spondylotic myelopathy (CSM), but only a few of those studies focus on preoperative dynamic cervical sagittal alignment and the study of different degrees of loss of cervical lordosis (LCL) is lacking. This study aimed to analyze patients who underwent CLP to investigate the effect of cervical extension and flexion function on different degrees of LCL.
methodsIn this retrospective case-control study, we analyzed 79 patients who underwent CLP for CSM between January 2019 and December 2020. We measured the cervical sagittal alignment parameters on lateral radiographs (neutral, flexion, and extension positions) and used Japanese Orthopedic Association (JOA) score to assess clinical outcomes. We defined the extension ratio (EXR) as 100 × Ext ROM (cervical range of extension)/ROM (cervical range of motion). We observed the relationships between collected variables (demographic and radiological variables) and LCL. Patients were classified into the following three groups according to the LCL: stability group: (LCL ≤ 5°); mild loss group (5° < LCL ≤ 10°); and severe loss group (LCL > 10°). We compared the differences of collected variables (demographic, surgical and radiological variables) among the three groups.
resultsSeventy-nine patients were enrolled (mean age 62.92 years; 51 men, 28 women) in the study. Among the three groups, cervical Ext ROM was the best in the stability group (p < 0.01). Compared with the stability group, range of flexion (Flex ROM) was significantly higher (p < 0.05) and EXR was significantly lower (p < 0.01) in the severe loss group. Compared with the severe loss group, JOA recovery rates were better (p < 0.01) in the stability group. Receiver-operating characteristic curve (ROC) analysis to predict LCL > 10° (area under the curve = 0.808, p < 0.001). The cutoff value for EXR was 16.80%, with sensitivity and specificity of 72.5% and 82.4%, respectively.
conclusionCLP should be carefully considered for patients with a preoperative low Ext ROM and high Flex ROM, as a significant kyphotic change is likely to develop after surgery. EXR is a useful and simple index to predict significant kyphotic changes.
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