Abstract:Objective To compare the clinical effects between traditional titanium plate with cage (group A)and Zero-P (group B) in treating cervical spondylosis.Methods The clinical data of 46 patients with cervical spondylotic myelopathy who underwent anterior cervical discectomy and fusion(ACDF) by traditional titanium plate with cage (group A, n =24) or Zero-P implant (group B, n =24) between July 2012 and June 2014 were retrospectively analyzed.The operation time,intraoperative blood loss,postoperative JOA scores,NDI score,Bazaz dysphagia score,cervical curvature,vertebral angle displacement and horizontal displacement were compared between groups.Results There was no statistical significance in terms of operation time and blood loss between group A and B(P>0.05).The JOA score,NDI score of the last follow-up was significant improved (P<0.05),but no statistical difference was found between both groups(P>0.05).The cervical curvature showed significantly increases after operation (P<0.05),Bazaz dysphagia score between the two groups was statistically significant (P<0.05).The cervical curvature,angle displacement and horizontal displacement were significantly higher in group A than in the group B at 6 months and final follow-up.Conclusion Zero-P implant and traditional titanium plate with cage have similar effective treatments for cervical spondylosis,while Zero-P implant has lower incidence of dysphagia and adjacent segment degeneration.
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