Correlation Between Degenerative Lumbar Disc Herniation And Sagittal Balance Parameters Of The Spine And Pelvis

Objective:To analyze the differences between the balance parameters in the sagittal position of the spine and pelvis of patients with degenerative lumbar disc herniation and those of the normal Chinese,so as to explore the relevant factors leading to the occurrence and development of degenerative lumbar disc herniation and provide certain value for the prediction and treatment of the disease.Methods:Retrospective analysis 32 degenerative lumbar disc herniation patients over 20 years old admitted to our department from January 2017 to December 2017,including 18 males and 14 females.All patients had full radiographic data,and the following data were measured on the standing full-length spine X-ray : Spinosacral angle(SSA),Sagittal vertical axis(SVA),Thoracic kyphosis(TK),lumbar Lordosis(LL),Pelvic incidence(PI),Sacral slope(SS),Pelvic tilt(PT).Results:1.Statistical analysis of all patients with degenerative lumbar discherniation with the domestic reference values showed that PT,SS,LL,TK,SVA and SSA had statistical differences(P < 0.01),PT and SVA were larger than the normal reference values,SS,TK and SSA were smaller than the normal reference values,and there was no statistical difference in PI(P > 0.05).2.Pearson correlation analysis results of all parameters show that PI is correlated and strongly correlated with SS and PT,SS is strongly correlated with SSA,LL is moderately correlated with TK and SSA,SVA is weakly correlated with PT,and SVA is moderately correlated with SSA.Conclusions:1.PI is a relatively stable parameter with little influence of receptor position changes,which can be used as an important parameter for preoperative and postoperative surgical plan design.2.Male PI value is lower than female,which may be the reason why degenerative lumbar disc herniation is more common in males.3.Patients with lumbar disc herniation increased PT and SVA,while SS,LL,TK and SSA decreased compared with those without symptoms.