Clinical Study On Mobi-C Cervical Artificial Disc Replacement In Two Segments

[Objective] TO analyze the clinical efficacy and radiographic changement of two segments Mobi-C cervical artificial disc replacement on the treatment of Cervical spondylosis[method]27patients undergoing two segments Mobi-C cervical artificial disc replacement surgery from January2012to October2013were reviewed and20cases of complete follow-up clinical data, including12cases of Cervical spondylosis myelopathy,and8cases of Cervical spondylosis radiculopathy,16cases of adjacent two segments,4cases spaced an intervertebral.The clinical and radiographic data was collected before operation and1week、1month、3months、6months、12months24months after operation. recording the time wearing cervical collar,before and after operation record the pathological reflexes(Hoffman sign, patellar clonus, ankle clonus, Babinski syndrome)and cervical JOA score、VAS score、NDI score.The outcome of operation wasevaluated by Odom’s criteria. The intervertebral height and the ROM of the cervical spnine、treated segments and adjacent segments was measured by static and dynamic cervical X-ray。[Results] All patients were followed for1-24months, an average of13.8months.Postoperative symptoms of all patients received to varying degrees, preoperative pain VAS score was7.47±1.24, Postoperative1week VAS score was2.36±1.17, compared with preoperative significantly improved.The difference between preoperative and postoperative VAS score was statistically significant (P <0,05), preoperative JOA score was10.85±3.43, Postoperative1week JOA score was12.98±2.25, compared with preoperative significantly improved. The difference between preoperative and postoperative JOA score was statistically significant (P <0,05). Preoperative pathological reflexes (Hoffmann syndrome, Babinski syndrome, patellar clonus, ankle clonus, chaddock syndrome)18positive cases, postoperative1week re-examination of the patient6positive cases,3positive cases after1and3months,2positive cases after6、12、24months.the NDI index of postoperative1week,1,3,6,12,24months were significantly higher than preoperative, the difference was statistically significant (P<0.05)In odom’s criteria, the satisfaction rate postoperative3months was96.2%, postoperative6months was93.8%, postoperative12months was87.5%。All the preoperative intervertebral height reduced and postoperative intervertebral height varying degrees of recovery, the difference between preoperative and postoperative intervertebral height was statistically significant (P<0.05),the difference between preoperative and postoperative intervertebral height were no statistically significant (P>0.05) in the adjacent sections, heterotopic ossification in2cases, including one case of postoperative six months, another one case occurred postoperative12months. The differences between preoperative and postoperative1week, cervical range of motion, activity replacement segment, overall activity there were statistically significant (P<0.05), while postoperative3months compared with the preoperative there were no significant (P>0.05), and after3months, the differences among each postoperative follow-up points there were no statistically significant (P>0.05).The average time of wearing the neck collar7days (5-12days)[Conclusion] The early clinical effect of Mobi-C cervical artificial disc replacement in two segments in the treatment of Cervical spondylosis was reliable, basically retained the cervical Intervertebral height and activity...