The changes of the intervertebral angle and retrolisthesis of the last instrumented vertebrae after anterior correction and instrumentation in adolescent idiopathic scoliosis
- VernacularTitle:脊柱侧凸前路矫形固定术后椎间角的变化及下融合椎后滑移
- Author:
Yipeng WANG
;
Bin YU
;
Guixing QIU
- Publication Type:Journal Article
- Keywords:
Scoliosis;
Spinal fusion;
Retrospective studies
- From:
Chinese Journal of Orthopaedics
2001;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the changes of the intervertebral angle and retrolisthesis of the last instrumented vertebrae (LIV) after anterior correction and instrumentation in adolescent idiopathic scoliosis patients. Methods By reviewing the medical records and roentgenograms of adolescent idiopathic scoliosis patients who underwent anterior correction and instrumentation in recent 4 years, their Cobb angle of the curve, correction rate, trunk shift, LIV rotation, obliquity between LIV and the pelvis, intervertebral angle and retrolisthesis of the LIV were measured and analyzed. Results There were total 50 patients included. The apex of the main curve was located at thoracolumbar junction or lumbar spine. The coronal Cobb angle of the main curve were 47.78??9.39? and 10.32??8.50? before and after surgery respectively, with an average correction rate of 79.05%. The average rotation of LIV before surgery was 1.54??0.58?, and improved to 1.06??0.47? after surgery. The obliquity between LIV and the pelvis before and after surgery were 23.80??7.91? and 9.16??9.46? respectively. The intervertebral angle was 3.72??3.05? before surgery, and -2.22??5.85? on Bending films, 1.56??5.97? after surgery respectively. The changes were of significance in the intervertebral angle after surgery compared with that before surgery(P=0.029). The angle was 4.87??7.95? at final follow up, the change was also significant compared with that after surgery(P=0.038). 19 patients had LIV retrolisthesis postoperatively, and the average retrolisthesis distance was (4.79?1.75) mm. There were significant differences between the patients with retrolisthesis and the patients without retrolisthesis in apical vertebral rotation and intervertebral angle on Bending films(P=0.047 and P=0.033) respectively. Conclusion The intervertebral angle is much improved after anterior correction and instrumentation surgery, but it increases gradually at follow up. The retrolisthesis of LIV may be correlated with the apical vertebral rotation before surgery and the intervertebral angle on Bending films.
