Cong Zhang; Yunfeng Zhang; Lidong Wang; Jinghong Yu; Yan Zhao; Huifeng Sun; Haiyan Wang; Baoke Su; Shang Gao1; Jianzhong Wang; Xing Wang; Yongqiang Cai; Enhe Jirigala; Yangyang Xu; Zhiqiang Wang; Mingjie Gao; Zhijun Li; Wei Wang & Xiaohe Li

This study aimed to investigate the sagittal spinal-pelvic morphological changes, as well as the relationship between pelvic anatomical changes and the spinal-pelvic plane in patients with adolescent idiopathic scoliosis (AIS), in order to provide guidelines for orthopedic surgery in AIS. X-ray data were collected for retrospective analysis from 30 patients diagnosed as AIS in the Departments of Radiology at the Second Affiliated Hospital of Inner Mongolia Medical University and the Inner Mongolia International Mongolian Medical Hospital from April 2014 to November 2018, along with 30 normal adolescents as control. Pelvic parameters, including pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS), a spinal parameter, lumbar lordosis (LL), and anatomical parameters, including sacral width (SW) and femoral head- sacrum distance (FH-S), were measured. The spinal-pelvic parameters were compared between AIS patients and normal controls and also between male and female AIS patients. Pearson correlation was performed to analyze correlation between spinal-pelvic parameters and between spinal-pelvic parameters and anatomical parameters in both AIS patients and normal controls. PT was significantly lower in AIS patients than in normal controls (P < 0.05), whereas no significant difference was found in the other spinal-pelvic parameters, i. e. , LL, PI, and SS. There was a significant difference in PT between sexes in AIS patients. SS was significantly correlated with LL in EIA patients (P < 0.05, r > 0.5). SS was significantly correlated with LL and PI, and PT with LL, PI, and SS in normal controls (all P < 0.05), and there was no significant correlation between the other sagittal spinal-pelvic parameters (P > 0.05). FH-S was significantly correlated with LL, PI, SS, and PT in AIS patients (all P < 0.05). AIS affects some of the sagittal spinal- pelvic parameters and anatomical parameters. In AIS, there is a significant correlation between the spinal-pelvic parameters, and the anatomical parameter is significantly correlated with multiple spinal-pelvic parameters.

KEY WORDS: Idiopathic scoliosis; Adolescent; Spinal-pelvic parameters; Digital measurement.

ZHANG, C.; ZHANG, Y.; WANG, L.; YU, J.; ZHAO, Y.; SUN, H.; WANG, H.; SU, B.; GAO, S.; WANG, J.; WANG, X.; CAI, Y.; JIRIGALA, E.; XU, Y.; WANG, Z.; GAO, M.; LI, Z.; WANG, W. & LI, X. A comparative study of sagittal spinal-pelvic parameters between patients with adolescent idiopathic scoliosis and healthy controls. Int. J. Morphol., 38(2):415-422, 2020.