Application of Zero-P cervical anterior fusion fixation system in three-segment cervical fusion and its effectiveness evaluation
ZHANG Rui-hua
CAO Ya-fei
LIU Wei-dong
LI Heng
Abstract：Objective To investigate the clinical effects of Zero-profile anchored spacer ( Zero-p ) in the treatment of cervical spondylosis of three segments and its effects on cervical lordosis. Methods From June 2013 to June 2015, 26 patients with three-segment cervical spondylosis were treated by anterior cervical discetomy with implant of Zero-p interbody fusion cages. There were 11 males and 15 females with the mean age of ( 56.21 ± 8.13 ) years. Japanese Orthopaedic Association ( JOA ) was applied to evaluate functions of the cervical vertebra, and the incidence of postoperative dysphagia was assessed by Bazaz dysphagia score. Neck Disability Index ( NDI ) was used to evaluate neurological functions. Changes of cervical lordosis were evaluated by C2-7Cobb's angle and Cobb's angle of the operative segments. The operation bleeding volume and operation time were analyzed and statistically analyzed. Results All the 26 patients were followed up for 1 year. The incidence of postoperative dysphagia was 7.69%. The average intraoperative blood loss was ( 53.23 ± 32.41 ) ml and the operation time was ( 161.26 ± 51.33 ) min. The NDI scores were significantly lower at 1 week ( 16.14 ± 1.77 points ), 3 months ( 11.53 ± 2.14 points ) and 12 months ( 11.29 ± 1.82 points ) postoperatively comparing with those preoperatively ( 23.42 ± 4.72 points ) ( P <0.05 ). The JOA scores at 1 week ( 11.52 ± 0.93 points ), 3 months ( 12.83 ± 1.18 points ) and 12 months ( 14.25 ± 1.47 points ) were significantly higher postoperatively comparing with those preoperatively ( 8.64 ± 1.37 points ) ( P < 0.05 ). Cobb's angle and C2-7Cobb's angle increased significantly from ( 4.52 ± 2.73 ) °, ( 7.92 ± 4.20 ) ° preoperatively to( 12.74 ± 1.91 ) °, ( 19.33 ± 4.47 ) ° 1 week postoperatively ( P < 0.05 ). No significant Cobb's angle or C2-7Cobb's angle lost were found 12 month postoperatively comparing with those 1 week postoperatively ( P > 0.05 ). No screw breakage or fusion cage displacement were found in the follow-up. Conclusions Anterior cervical discetomy with implant of Zero-p interbody fusion cages has good clinical effects in the treatment of cervical spondylosis, and can effectively restore and maintain cervical lordosis.
Keywords：Cervical vertebraeInternal fixatorsCervical spondylosisSpinal fusion
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 862-866 )