X-ray And CT Measurement Before Operation Of Posterior Pedicle Screw Fixation Of Thoracolumbar Fracture

Objective: To evaluate the security and the efficiency of posterior pedicle screw fixation of thoracolumbar fracture.Method: The X-ray and spiral CT images of 60 case of thoracolumbar fracture had been measured.Results: The measurement of vertical distance from both pedicle to spinous axis could be used to judge the rotation of vertebrace. The measurement of the pedicle width, the screw path length, transverse screw angle and the distances between pedicles from T10 to L5 showed great significant difference on different vertebral level. The sagittal screw angle is relative unsteady in posterior internal fixation. The position of screw is good, the angle is correct, and the length is suitable. The measurement of the compress of the vertebrace and spinal Cobb angle and the area of the vertebral canal before and after operation showed significant difference. The case had been followed-up from 6 to 36 months and the result is satisfactory.Conclusion: The measurement by X-ray and CT before operation is helpful to judge the type of thoracolumbar fracture. The choice and the entering route of pedicle screw varied in different individual and different vertebral level with a large variability. The measurement is helpful to individual identification entering pedicle screw to evaluate the security and the efficiency of posterior pedicle screw fixation. It is necessary to draw on the experience of the theory and measurement of scoliosis.