| Objective: To study the pelvic-tilt of patients with CNLBP. To investigate the relationship between CNLBP and pelvic-tilt by imaging findings.Methods: Collect the information of 400 eligible patients with imaging checking in Sichuan Orthopaedic Hospital since July to October in 2014. Using imaging software system of Sichuan Orthopaedic Hospital to measure DR image data,including coronal pelvic tilt angle, pelvic incidence, sacral slope, lumbosacral angle. Group data by the normal range for the parameters. Observing the statistical analysis results of SPSS, including:1.counting statistics of each group 2. the value of sample parameter and the difference with the standard value of each parameters 3. the parameters and age, gender, disease duration. 3.the relationship between parameters, age, gender and disease duration.Results: 1. the mean value of coronal pelvic tilt angle is 1.66 ± 1.23 °. 0 case in the group of value 0°. 388 cases in the group of value 0-5°, accounting for 97%; 12 cases in the group of value 5-15°, accounting for 3%. 2. 2. the mean value of sacral slope is 34.12 ± 8.05 °; 119 cases in the group of small SS, accounting for 29.5%; 273 cases in the group of normal SS, accounting for 68.3%; 9 cases in the group of large SS, accounting for 2.3%; 3. the mean value of pelvic incidence is 49.07±9.65°; 69 cases in the group of small PI, accounting for 17.3%; 308 cases in the group of normal PI, accounting for 77.0%; 9 cases in the group of large SS, accounting for 5.8%. 4. the mean value of lumbosacral angle is 137.25±8.00°; 91 cases in the group of small LSA, accounting for 22.8%; 300 cases in the group of normal LSA, accounting for 75.0%; 9 cases in the group of large LSA, accounting for 2.3%. 5. 172 cases in the group of left-tilt pelvic, accounting for 43%; 228 cases in the group of right-tilt pelvic, accounting for 57%. There was no significant difference between the value of each parameters of left-tilt pelvic and right-tilt pelvic patients. 6. 118 cases in the group of forward-tilt pelvic, accounting for 29.5%; 228 cases in the group of backward-tilt pelvic, accounting for 2.3%. 7. the values of SS, PI, LSA and SS/PI are significantly smaller than the standard values of each parameter. 8. There was significant difference between the value of LSA from male and female patients.9. SS was positively correlated with the logarithm of disease duration; LSA was positively correlated with the logarithm of disease duration, age; coronal pelvic tilt angle was positively correlated with LSA; LSA was negatively correlated with SS; SS was strongly positively correlated with PI.Conclusion: 1. The low degree of pelvis coronal tilt is common among patients with CNLBP 2. In the sagittal plane, the backward-tilt form was more likely to be the tilt form of pelvic. Smaller PI, SS and LSA were more related to symptoms of CNLBP. 3.Among the patients with CNLBP,the degree of female lumbosacral joint stability is low than that of male. 4.Among the patients with CNLBP, the coronal balance was influenced by sagittal balance to a certain extent, while the direction of coronal tilt and the direction of sagittal tilt was independent. 5.Pelvis and lumbar spine are related in biomechanics and function, the relevant imaging parameters are closely related. 6.Identifying the form of pelvic-tilt by imaging findings of patients with CNLBP is significance for the diagnosis and treatment. |
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