Clinical Analysis Of The Combined Use Of Single-Segment Zero-P Intervertebral Fusion Device In The Treatment Of Three-Segment Cervical Spondylotic Myelopathy Under Microscope

Objective:To compare the clinical effect of anterior cervical approach combined with single-segmental Zero-p intervertebral fusion cage and conventional locking titanium plate in the treatment of three-segmental cervical spondylotic myelopathy.Methods:Retrospective analysis was performed on 18 patients with anterior cervical discectomy and fusion+two-segmental locking titanium plate fixation system+single-segmental Zero-p intervertebral fusion fixation system(combined group)and 20 patients with conventional anterior cervical discectomy and fusion+three-segmental locking titanium plate fixation system(conventional group).Preoperative and postoperative indicators and postoperative follow-up were analyzed in the two groups.Results:The combined group was superior to the conventional group in operation time,intraoperative blood loss,postoperative incidence of adjacent segment degeneration.VAS,JOA score and Cobb Angle of cervical vertebra at each follow-up time point before and after operation were not significantly different between the two groups(P>0.05).According to the modified Macnab standard at the last follow-up,12 cases were excellent,5 cases were good,and 3 cases were acceptable in the conventional group,with an excellent and good rate of 85%.In the combined group,11 cases were excellent,4 cases were good,and 3 cases were acceptable,with an excellent and good rate of 83.3%.At the time of the last follow-up llevel fusion rate between the two groups compare difference has no statistical significance(P>0.05).Conclusion:In the treatment of three-segmental cervical spondylotic myelopathy,anterior cervical approach combined with Zero-p intervertebral fusion cage can achieve the same clinical effect as conventional locking titanium plate,but it has advantages in shortening the operation time,reducing intraoperative blood loss,reducing the incidence of adjacent segment degeneration,and reducing the difficulty of operation.