Increased Neck Tilt/T1 slope ratio may play an important role in patients with cervical kyphosis

BMC Musculoskeletal Disorders

Weihong Xu¹  Yuming Huang²  Zhibin Lan³  Zhiqiang Wu³ 

[1] Department of Spine Surgery, First Affiliated Hospital of Fujian Medical University, 350004, Fuzhou, Fujian, China;Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China;The Spine Surgery Department, Quanzhou Orthopedic-Traumatological Hospital of Fujian Traditional Chinese Medicine University, Citong Road, Fengze District, 362000, Quanzhou, China;

关键词: Cervical kyphosis;    Neck tilt;    T1 slope;    C2–7 lordosis;    NDI;   

DOI  :  10.1186/s12891-021-04678-8

来源: Springer

【 摘 要 】

BackgroundIn previous studies, we demonstrated that the T1 slope (T1s) is associated with clinical outcomes, but the results were not specific for individuals. A recent study suggested that an increased pelvic tilt (PT)/sacral slope (SS) ratio may play an important role in the degeneration of lumbar scoliosis and pathogenesis of lumbar spondylolisthesis. Therefore, we aimed to explore the role of neck tilt (NT)/T1s in patients with cervical kyphosis.MethodsIn total, the data of 36 kyphosis patients who underwent anterior cervical hybrid decompression and fusion (ACHDF) for multilevel (3 levels) cervical spondylotic myelopathy were retrospectively analyzed. The radiographic measurements included the T1s, NT, C2–7 Cobb angle, and C2–7 sagittal vertical axis (SVA). The visual analog scale (VAS) and neck disability index (NDI) scores were used to determine the clinical prognosis. Pearson’s correlation coefficient was calculated to assess the relationships among preoperative imaging examination parameters.ResultsThe mean C2–7 Cobb angle was − 5.93 ± 3.00° before surgery, 9.67 ± 6.61° after surgery, and 7.91 ± 8.73° at the follow-up. The preoperative NT/T1s ratio was positively correlated with the ΔC2–7 Cobb angle (r = 0.358, p < 0.05) and negatively correlated with the preoperative C2–7 Cobb angle (r = -0.515, p < 0.01) and preoperative C2–7 SVA (r = -0.461, p < 0.01). The linear regression model indicated a positive correlation between the preoperative NT/T1s ratio and the ΔC2–7 Cobb angle (R2 = 0.122).ConclusionsThe preoperative NT/T1s ratio may be positively correlated with changes in postoperative cervical spine curvature (Cobb angle). The NT/T1s ratio may be worthy of increased attention among sagittal parameters.

【 授权许可】

CC BY