Application of pedical screw visualization technique in screw placement of lumbar vertebrae fracture

Yu Hai-long; Liu Jun; Chen Yu; Wang Hong-wei; Wang Qi; Ma Jun-xiong; Ren Wei-jian; Meng Ling-zhi; Xiang Liang-bi

doi:10.3969/j.issn.2095-4344.2014.04.010

Abstract：BACKGROUND:Three-dimensional visualization technique has been widely used in clinical treatment. Preoperative visualization technique al ows safe demonstration on the complex spine fracture models, and also prepare screw placement scheme according to three-dimensional model of patients. <br> OBJECTIVE:To discuss the clinical result of treating short-segment lumbar vertebrae fracture with pedicle screw visualization. <br> METHODS:A total of 32 patients with lumbar vertebrae fracture were treated with 182 pedicle screws. Before the screw implantation, the structure of bilateral pedicle was observed using Mimics software and the implantation parameters were measured. The operation methods and related complications were told to the patients through the reconstructed three-dimensional images. The satisfaction of the patients, operation time, and the position of pedicle screws by postoperative CT scan were assessed. The percentages of anterior vertebral height and Cobb’s angle were measured before operation, 2 weeks after operation and 8 months after operation. <br> RESULTS AND CONCLUSION:The excellent satisfaction rate of the patients was 100%, the mean operation time was 185 minutes, and 173 pedicle screws (95.1%) were total y inserted within the pedicle. Al patients were fol owed up for 7-22 months. The results showed that the fracture healed wel . The percent of anterior vertebral height and Cobb’s angle at 2 weeks after operation were significantly decreased compared with them before operation (P<0.05). There were no significant difference about the percent of anterior vertebral height and Cobb’s angle between 2 weeks and 8 months fol ow-up (P>0.05). Single-segment lumbar vertebrae fracture was wel treated by the pedicle screw visualization technique. This method assists to make up preoperation plan, increase the rate of patients’ satisfaction, shorten operation time, and increase the accuracy of pedicle screw insertion.