Three-Dimensional Characterization of Torsion and Asymmetry of the Intervertebral Discs Versus Vertebral Bodies in Adolescent Idiopathic Scoliosis

被引:73
作者
Schlosser, Tom P. C. [1 ]
van Stralen, Marijn [2 ]
Brink, Rob C. [1 ]
Chu, Winnie C. W. [3 ,4 ]
Lam, Tsz-Ping [5 ]
Vincken, Koen L. [2 ]
Castelein, Rene M. [1 ]
Cheng, Jack C. Y. [5 ]
机构
[1] Univ Med Ctr Utrecht, Dept Orthoped Surg, NL-3508 GA Utrecht, Netherlands
[2] Univ Med Ctr Utrecht, Image Sci Inst, NL-3508 GA Utrecht, Netherlands
[3] Chinese Univ Hong Kong, Prince Wales Hosp, Dept Diagnost Radiol, Shatin, Hong Kong, Peoples R China
[4] Univ Hong Kong, Prince Wales Hosp, Dept Organ Imaging, Shatin, Hong Kong, Peoples R China
[5] Univ Hong Kong, Prince Wales Hosp, Dept Orthopaed Traumatol, Shatin, Hong Kong, Peoples R China
关键词
etiopathogenesis of adolescent idiopathic scoliosis; 3-dimensional deformity; anterior overgrowth; anterior-posterior length discrepancy; torsion; skeletal growth; vertebral body wedging; intervertebral disc wedging; vertebral body asymmetry; ANTERIOR SPINAL OVERGROWTH; MEMBRANOUS BONE-GROWTH; PATHOGENESIS; PROGRESSION; HYPOTHESIS; CORD;
D O I
10.1097/BRS.0000000000000467
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Study Design. Cross-sectional study. Objective. To compare the relative contribution of the vertebral bodies and intervertebral discs with the 3-dimensional spinal deformity in adolescent idiopathic scoliosis. Summary of Background Data. There is an ongoing discussion about the causal role of skeletal growth processes in the etiopathogenesis of adolescent idiopathic scoliosis. Contradictory findings have been reported on the individual contribution of the vertebral bodies as compared with the discs to the coronal deformity. As far as we know, the true 3-dimensional deformity of the discs and vertebral bodies have not yet been described. Methods. High-resolution computed tomographic scans of 77 patients with severe adolescent idiopathic scoliosis were included. Torsion and anterior-posterior and right-left asymmetry of each individual vertebral body and intervertebral disc were studied from T2 to L5, using semiautomatic analysis software. True transverse sections were reconstructed along the anterior-posterior and right-left axis of all endplates. These "endplate-vectors" were calculated semiautomatically, taking rotation and tilt into account. Torsion was defined as the difference in axial rotation between 2 subsequent endplates. Asymmetry was defined as the relative anterior-posterior or right-left height difference of the discs and the vertebrae. Results. There were at least 3 times more torsion, anterior overgrowth, and coronal wedging in the discs than in the vertebrae in the thoracic as well as in the (thoraco) lumbar curves (P < 0.001). These values correlated significantly with the Cobb angle (r >= 0.37; P < 0.001). Anterior overgrowth and coronal asymmetry were greater in the apical regions whereas torsion was most pronounced in the transitional segments between the curves. Conclusion. The discs contribute more to 3-D deformity than the bony structures, and there is significant regional variability. This suggests an adaptive rather than an active phenomenon.
引用
收藏
页码:E1159 / E1166
页数:8
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