Application of Digital Reconstruction Technique in the Anatomical Study of Lumbar Pedicle Screw Placement Based on Three-dimensional CT Images
SHI Yunli
LI Shuo
ZHU Jiang
WANG Lei
GUO Xiaohui
Abstract：Objective To investigate the application value of digital reconstruction technique in the anatomical study of lumbar pedicle screw placement based on three-dimensional(3D)CT image.Methods From January 2020 to January 2022,120 patients with lumbar spine fractures were selected,and their CT images were collected and imported into Mim-ics17.0 in DICOM format for image processing and 3D model reconstruction.The width and height of the pedicle,pedicle screw diameter,length,downtilt angle and abduction angle of virtual cortical bone trajectory screws were measured and ana-lyzed.Results The pedicle width increased from L1-5,and the difference was statistically significant among different seg-ments(P＜0.05).There was no significant difference in pedicle height between L4 and L5 segments(P＞0.05),but there was significant difference in pedicle height between the remaining segments(P＜0.05).The width and height of pedicle at L1-5 segments in males were greater than those in females(P＜0.01).The diameter of virtual cortical bone trajectory screws and distance between the nails at L2-5 were significantly increased,there was no significant difference between L1 and L2 seg-ments(P＞0.05),and pairwise difference between the remaining segments was statistically significant(P＜0.05).There were no significant differences in the length,diameter,distance between the nails,abduction angle,and downtilt angle of vir-tual cortical bone trajectory screws on both sides of the same vertebral body(P＞0.05).The length of cortical bone trajectory screws at L1-5 segments in males was longer than that in females(P＜0.05,P＜0.01).Conclusion Digital reconstruction technique can guide the clinical formulation of personalized pedicle nailing scheme for patients with lumbar fracture,and pro-vide anatomical basis for the surgical design of patients with pedicle screw placement at different segments and of different gen-ders.
Keywords：Spinal fracturesDigital reconstruction technologyPedicle nail3D model reconstructionPedicle widthPedicle heightScrew lengthScrew diameter
Publication Date：2023-09-22
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 67-71,101 )