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
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To build a mathematical model which could calculate the desired laminoplasty opening size (LOS) based on the target sagittal canal diameter (SCD) before single-door cervical laminoplasty (SDCL) when taking the effects of surgery drill into consideration. ⋯ Applying the mathematical model and derived formula, the desired LOS could be calculated according to the target SCD which could help the surgeon select an optimum mini-plate before SDCL. At the same time, a new measuring device named Lei's ruler is designed for the convenience of the derived formula. These slides can be retrieved under Electronic Supplementary Material.
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Comparative Study
Comparison of a novel anterior-only approach and the conventional posterior-anterior approach for cervical facet dislocation: a retrospective study.
The surgical treatment of lower cervical facet dislocation is controversial. The objective of this study was to compare the surgical trauma and clinical results of a novel anterior-only approach and with those of the conventional posterior-anterior approach to obtain an optimal method to treat lower cervical facet dislocation. ⋯ Compared with the conventional posterior-anterior approach, the novel anterior-only approach with two reduction techniques, including Caspar pins kyphotic paramedian distraction and anterior facetectomy, achieved a 100% reduction success rate and induced less surgical trauma, indicating that this method can be recommended as an alternative for lower cervical facet dislocation. These slides can be retrieved under Electronic Supplementary Material.
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Previous studies have shown poor health-related outcomes among patients with spinal sagittal malalignment of the thoracolumbar or spinopelvic region, and less interest has been paid to the relationship between cervical sagittal balance and functional outcome of the patients. This study aims to compare the cervical sagittal parameters between patients with non-specific neck pain and asymptomatic controls. ⋯ Our findings showed that the slope of the upper endplate of T1 vertebrae body (T1 slope) is significantly lower among patients with non-specific neck pain compared to controls. A compensatory mechanism to bring the center of head gravity back to the spinal axis might be the possible explanation for this difference. These slides can be retrieved under Electronic Supplementary Material.
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Klippel-Feil syndrome (KFS) occurs due to failure of vertebral segmentation during development. Minimal research has been done to understand the prevalence of associated symptoms. Here, we report one of the largest collections of KFS patient data. ⋯ KFS is associated with a number of musculoskeletal and neurological symptoms. Fusions are more prevalent toward the center of the cervical region, and less common at the occipital/thoracic junction. Associated comorbidities including Sprengel deformity may be more common in KFS patients with multilevel cervical fusions. These slides can be retrieved under Electronic Supplementary Material.
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The pathogenesis of ossification of posterior longitudinal ligament (OPLL) is not completely clear. Previous study has confirmed a single-pass type I endoplasmic reticulum (ER) membrane protein kinase (PERK), which is a major transducer of the ER stress, participates in the process of OPLL in vitro. This study aimed to demonstrate the role of ER stress in mechanical stress (MS)-induced OPLL. ⋯ Activated ER stress was observed in OPLL patients both in vitro and in vivo. Mechanical stress could activate ER stress response in posterior longitudinal ligament fibroblasts and further promote OPLL in vitro. In this process, ER stress might work through the MAPK signaling pathways. These slides can be retrieved under Electronic Supplementary Material.