The relationship between sagittal facet joint angle and degenerative lumbar spondylolisthesis
WANG Zongbo1 WANG Yuguang1 ZHU Yong2 ZHANG Zhiyong1
1.Department of Radiology, the Second Affiliated Hospital of Inner Mongolia Medical University, Inner Mongolia Autonomous Region, Hohhot 010030, China; 2.Department of Spine Surgery, the Second Affiliated Hospital of Inner Mongolia Medical University, Inner Mongolia Autonomous Region, Hohhot 010030, China
Abstract:Objective To investigate the relationship between sagittal facet joint angle (FJO) and degenerative lumbar spondylolisthesis (DLS). Methods A total of 100 inpatients with anteriorⅠ° spondylolisthesis of the lumbar 4 vertebral body from January 2017 to November 2019 in the Second Affiliated Hospital of Inner Mongolia Medical University were selected as the DLS group, while another 100 cases without lumbar spondylolisthesis were selected as control group. All patients underwent lumbar disc CT (including L3-S1 space) scanning. The scanning data was imported into postprocessing workstation for postprocessing, and the degree of spondylolisthesis was graded using the Meyerding method. The angle between the articular process joint of the transpedicular pedicle and the coronal plane of the vertebral body, the angle between the articular process joint and the spinous process were measured which were marked as α1 and α2, respectively, and the average value of the two is the intervertebral space FJO. Results The FJO of L3/4, L4/5, L5/S1 in DLS group were smaller than those in control group, and the differences were statistically significant (P < 0.05). The difference value of FJO α1 and α2 on the left and right sides of L4/5 in the DLS group were greater than those of the control group, and the differences were statistically significant (P < 0.05); compared with the control group, the difference value of FJO α1 and α2 on the left and right sides of L3/4, L5/S1 in the DLS group were not statistically significant (P > 0.05). Conclusion Lumbar vertebrae FJO sagittal is closely related to lumbar spondylolisthesis, and the FJO of the adjacent vertebral body of the spondylolisthesis body has a sagittal tendency; the left and right FJO asymmetry of the spondylolisthesis body is obvious.