Effect Of Bridging Osteophyte On Local Kyphosis After Operation Of Thoracolumbar Burst Fracture

Objective: To evaluate the effect of the bridging osteophyte after the operation of Posterior Short-Segment Pedicle Screw Fixation without fusion for thoracolumbar burst fracture on the convex Cobb angle.Methods: Retrospective analysis of 119 patients(27 cases with-bridging osteophyte,92 cases without-bridging osteophyte)eligible for inclusion criteria treated with posterior short-segment pedicle screw fixation without fusion from September 2012 to September2014 in our department.The convex Cobb angle at pre-,post-operation and the last follow up were collected and analysed.Results: The convex Cobb angle at pre-operative,Immediately after operation and the last follow up were: 37±3.31°,7.52±3.06°,and 8.39±2.95° in the with-bridging osteophyte group,while 15.46±3.61°,7.24±3.41° and 7.97±3.31° in the without-bridging osteophyte group.There was no statistically significant difference between the two groups(P > 0.05).There was a statistically difference between the last follow-up and the immediately after operation in both groups(F = 79.421,P = 0.011;F=338.140,P=0.000).Conclusion: In the case of fresh single-segment thoracolumbar burst fracture treated with posterior Short-Segment Pedicle Screw Fixation without fusion,the formation of bridging osteophyte was the result of self-repair and self-stabilization of the vertebre,and had no effect on local kyphosis.