The Retrospective Study The Relations Between Lower Cervical Vertebra Dislocation And Neck Neurological Damage

Objective: Through the review of literature at home and abroad to understandthe classification, mechanism of the dislocation of lower cervical spine, the clinicalmanifestation caused by different degrees of dislocation, and no formation mechanismof spinal cord injury in special circumstances. Through the collection of clinical dataconcerning the case to retrospective analysis the relationship between dislocation oflower cervical spine and spinal cord injury. Further study and discussion on theductility characteristics of the spinal cord and Spinal cord injury caused bywith/without pedicle and lamina fractures.Method: The study collected a total of65cases of inpatients in the first hospitalof JiLin University that were definitely diagnosed as the low cervical vertebradislocation,with X-ray, CT, MRI and other Imaging examination data that wascompleted,during April2010to April2013. consist of male56cases, female9cases.55cases with anterior dislocation of lower cervical spine,10cases of posteriordislocation. And all classifications of spinal cord injury severity in lower cervicalvertebra dislocation based on FRANKEL grade. Using the chi-square test to analysisof the spinal cord injury in such cases of with/without pedicle and lamina fractures inlower cervical vertebra dislocation which the degree of dislocation at II°or theabove, and the combining cervical facet dislocation with pedicle and lamina fractures.Result:1.By comparing the spinal cord injury with different degrees of anteriordislocation of the low cervical spine, the results showed spinal cord injury haveobvious difference. and it shows no statistical significance in the degree of spinal cordinjury,By comparison in anterior and posterior dislocation of the lower cervical spinewith finite sample in this study.2.By comparing the difference of pedicle and lamina fractures in anterior orbackward dislocation of the low cervical spine, and pedicle and lamina fractures in different degrees of anterior dislocation of the low cervical spine, using the chi-squaretest showed that P>0.05,means that there were no significant difference.3. Using the chi-square test to analysis of the spinal cord injury in the two groupsthat with or without pedicle and lamina fractures. the results showed χ2=19.697，P<0.05,means that there were significant difference.4.Using the chi-square test to analysis of the spinal cord injury in the two groupsthat the combining cervical facet dislocation with or without pedicle and laminafractures with or no. the results showed χ2=19.495，P<0.05,means that there weresignificant difference.Conclusion:1.The heavier the degree of cervical dislocation, the greater the possibility ofsevere spinal cord injury.2.The degree of spinal cord injury in the cervical dislocation with Pedicle andlamina fractures was obviously lighter than the cervical dislocation without Pedicleand lamina fractures. Pedicle and lamina fractures in cervical dislocation has noobvious correlation with the direction and degree.3. In the process of the cervical dislocation, spinal cord to the cutting force ofresistance is poorer than the Pull force.4. Ductility spinal cord play an important role in protecting the spinal cord frompull. Compared with physiological conditions cervical spinal cord ductility is strongerunder the condition of cervical dislocation.