Biomechanical study of bioactive cervical fusion cage with different types of fixation in cervical spinal fusion / 国际外科学杂志

ABSTRACT

ObjectiveTo investigate the biomechanical characteristics of different types of fixation with bioactive cervical fusion cage made of hydroxyapatite and poly L-lactic acid in cervical spinal fusion.MethodsIliac crest bone,bioactive cervical fusion cage and bioactive cervical fusion cage with plate fixation were used for anterior interbody implants after anterior discectomy across C5-6 in six fresh human cervical spine specimens respectively,and the range of motion of the cervical vertebrae interbody fusion were measured through the motional stability test.Results After discectomy,Bioactive Cervical Fusion Cage with plate fixation exhibited a significant increase in stability and a decrease of range of motion in angular motion than others in all motional directions ( P ＜ 0.005 ). Bioactive cervical fusion cage exhibited a decrease in stability and an increase of range of motion (6.25 ± 0.29) in angular motion than the intact spine (5.76 ± 0.40) in extension,but the difference was not significantly ( P ＞ 0.05 ).Bioactive cervical fusion cage exhibited a decrease in angular motion than iliac crest bone and a significant increase in stability in all motional directions except extension (P ＜ 0.005).ConclusionsBioactive cervical fusion cage' s biomechanical performance was excellent and bioactive cervical fusion cage with plate fixation was excellent in stability in all motional direction,and could remain initial stability of cervical vertebrae.