Clinical Analysis Of New Zero-p System And Conventional Plating And Cage System In The Treatment Of Cervical Spondylosis

Objective:To explore clinical effects of new Zero-p system and conventional plating and cage system in the treatment of cervical spondylosis.Methods:From January 2012 to December 2015,a total of 56 patients with cervical spondylosis were treated with plating and cage system(conventional surgery group)and 47 patients underwent surgery with Zero-p device(Zero-p group).The evaluation indexes included operation time,blood loss,smoking history,surgical segments,follow-up time,incidence of bone fusion,dysphagia rate,and adjacent-level ossification development(ALOD)were recorded.On the other hand,visual analogue scale(VAS),Japanese Orthopaedic Association(JOA)scores,cervical physiological curvature and Intervertebral height were investigated pre-and postoperative.Results:In the conventional surgery group,the single-segment operation time was significantly higher than that in the Zero-p group(p<0.05);whereas,no significant difference was discovered in general information,bi-segment or multi-segment operation time,follow-up time,interbody fusion rate between two groups.VAS score,JOA score,cervical curvature and height of intervertebral space were significantly recovered in both groups at postoperative follow-up(p<0.05),but not found between the two groups.Within 12 months after operation,dysphagia rate in the Zero-p group was lower compared with that in the conventional surgery group(p<0.05).At the last follow-up,the incidence of ALOD in the conventional surgery group(25.00%)was significantly higher than that in the Zero-p group(3.19%,p<0.05).Conclusion:The clinical effects of Zero-p or tradition method in the treatment of cervical spondylosis are both satisfactory,but postoperative incidence of dysphagia and ALOD in the patients with Zero-p system is lower.