Changes in sagittal parameters of the cervical spine after upper cervical spine surgery and influencing factors
Objective:To analyze the changes in cervical sagittal parameters and the Influencing factors in patients with atlantoaxial dislocation after upper cervical spine surgery.Methods:A retrospective analysis of 15 patients with atlantoaxial dislocation who underwent upper cervical spine surgery from March 2011 to July 2022 was conducted.All patients'basic information and sagittal parameters including occipitocervical angle(C0-C2 Cobb angle),lower cervical curvature(C2-C7 Cobb angle),T1 slope and C2-C7 sagittal vertical axis(C2-C7 SVA)before surgery and at the last follow-up were counted and statistically analyzed.Results:The C2-C7 Cobb angle at the last follow-up was significantly lower than the preoperative one(15.18°±12.41° vs.24.30°±15.57°,P＜0.05),and the T1 slope at the last follow-up was significantly higher than the preoperative one(28.09°±15.20° vs.24.14°±15.59°,P＜0.05).Compared with preoperative ones,the C0-C2 Cobb angle and C2-C7 SVA were increased,but no statistically significant difference was found(both P＞0.05).AC2-C7 Cobb angle was significantly related to the preoperative C2-C7 Cobb angle(P＜0.05).The varying degrees of lower cervical curvature reduction ocurred after surgery in patients with a preoperative C2-C7 Cobb angle＞20°.Conclusions:Patients with atlantoaxial dislocation who underwent upper cervical surgery may have reduced lower cervical curvature postoperatively.Loss of lower cervical curvature postoperatively is related to the angle of preoperative C2-C7 Cobb angle,and a preoperative C2-C7 Cobb angle＞20° may increase the risk of reduced lower cervical curvature.
万方数据
维普
