Three-dimensional CT In Surgery For Children With Scoilosis

Objective To evaluate the use of three-dimensional CT scan in surgery for children with different scoliosis, especially congenital and idiopathic scoliosis.Method55cases with scoliosis who were hospitalized in our department from June2008to June2011were studied,42cases with idiopathic scoliosis,13cases with congenital scoliosis. All the cases underwent three-dimensional CT scan in prone position before operation, which located the pedicle entry point, worked out pedicle depth and the width of the pedicle spongy bone, meanwhile measured the pedicle inclination angle, vertebral rotation angle and the sagittal angle. Accuracy of pedicle screw placement and the mean Cobb’s angle in coronal plane were measured through three dimensional CT scan after operation. All the data was processed though statistical analysis.Result There were450pedicle screws inserted in total (358in idiopathic scoliosis, and the others in the congenital scoliosis),8of which were displaced (5in idiopathic scoliosis, and the others in the congenital scoliosis), with the accuracy rate of98.22%.The mean preoperative Cobb’s angle and the postoperative angle scanned by three dimensional CT in coronal plane were62.32°(43°108.6°) and16.5°(2°60.7°) respectively. No pedicle expansion or spinal cord injury was recorded.Conclusion Three dimensional CT scan took preoperatively provides more complete measuring parameters, such as pedicle inclination angle, pedicle depth, vertebral rotation angle and insertion point, helping implant the pedicle screws more precisely, can be used widely in clinical practice to improve the safety on the operation and lower the incidence of complications.