Relationship between the postoperative loss of kyphosis correction degree of thoracolumbar fracture and injured vertebra morphology scale

XUE Yi; SHAO Yi-min; ZHANG Yong-liang; WANG Qiang

doi:10.3969/j.issn.1009-4237.2016.12.006

Abstract：Objective To evaluate the relationship between the loss of kyphosis correction degree of thora-columbar fracture and injured vertebra morphology scale .Methods From Jun.2011 to Jun.2013,56 patients with thoracolumbar fracture received treatment of posterior cross segment pedicle fixation .Before and after surgery and at follow-up,Cobb angle ,vertebral compression rate and disc space height next to the injured vertebra were evaluated . All the patients were divided into 3 groups according to the scale .The loss of kyphosis correction degree and disc space height were compared among the 3 groups, and the relationship between the loss of kyphosis correction degree and injured vertebra morphology scale was analyzed . Results All the patients were followed up for 13 to 19 months,with an average of 15.5 months.The loss of kyphosis correction degree and injured vertebra morphology scale were obviously related .The correction degree loss was significantly different within the 3 groups ( P<0.05 );the loss of Cobb angle was 0.5°and the loss of vertebral compression rate was 0.6% in the mild group;the loss of Cobb angle was 2.7°and the loss of vertebral compression rate was 4.4% in the moderate group;the loss of Cobb angle was 4.1°and the loss of vertebral compression rate was 8.4% in the severe group with internal fixation bro-ken.The results indicated that patients with higher scale were more likely to develop complications with obvious loss of vetebral compression rate .Conclusion The loss of kyphosis correction degree and injured vertebra morphology scale are obviously associated ,and the scale has a great guiding significance in the treatment of thoracolumbar frac-tures.