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Objective: A case-control study, sagittal diameter ratio decreased bone density group and bone mineral density in normal group the spinal canal and vertebral body of the cervical spinal cord patients, vertebral body deformation Index and clinical manifestations comparative study to investigate the bone loose with cervical spondylosis, and thus provide new ideas for clinical prevention and treatment of cervical spondylosis. Method: all cervical myelopathy patients were divided into two groups based on lumbar spine BMD measured values, normal lumbar spine BMD group of 27 cases of CSM patients, average age 57 years; reduce lumbar spine BMD group CSM patients, 24 patients , with an average age of 59 years old. In all cases measured cervical lateral radiographs C3-C6 vertebral body of each vertebral body on the middle and lower sagittal diameter, the height of the vertebral leading and trailing edges, sagittal diameter of the vertebral canal behind the upper, middle and lower averaged; calculation spinal vertebral body sagittal diameter ratio the vertebral deformation index value, and for comparison, the ratio of the sagittal diameter of the cervical spinal canal and vertebral bodies of the two groups were observed between the two groups, vertebral deformation index Is there a difference between the values. And observed two groups of clinical manifestations (dizziness numbness walking whether there is a difference between instability and modified the Hoffman test the test, neck flexion test had held out his lower limb muscle hypertonia). Results: The two groups compared with lower bone mineral density group cervical spinal vertebral sagittal bone mineral density ratio (C3 0.788 ± 0.107, C4 0.757 ± 0.119, C5 0.724 ± 0.0703, C6 0.692 ± 0.052) than the normal group (C3 0.996 ± 0.081, C4 0.930 ± 0.118, C5 0.955 ± 0.0917, C6 1.0013 ± 0.282) was significantly lower (P lt; 0.05 or P lt; 0.01), and cervical vertebral deformation index (C3, C4, C5, C6) in the two groups between no significant difference (P gt; 0.05); compare two clinical manifestations, clinical manifestations of decreased bone density group positive rate (dizziness 22 cases accounted for 91.6%, the numbness cases of 20 cases (83.3%), 19 cases of unstable walking 79.1% improvement Hoffman levy the 23 cases (95.8%), neck held out his flexion test 18 cases accounted for 75% of the lower limb muscle hypertonia 18 cases accounted for 75%) was significantly higher than the bone mineral density in the normal group (dizziness 16 cases accounted for 60% numbness 14 cases accounted for 51.8%, 15 cases of unstable walking accounted for 55.5%, improvement Hoffman levy of 18 cases (66.7%), 13 cases (48.1%), lower extremity muscle tension increased in 12 cases accounted for 44.4%), P lt neck held out his flexion test ; 0.05. Conclusion: CSM patients decreased bone density causes morphological changes of the cervical vertebral bone hyperplasia, spinal stenosis, bone density to reduce the group CSM patients' clinical performance is more obvious than bone mineral density in the normal group.
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