Validation efforts and flexibilities of an eight-year-old human juvenile lumbar spine using a threeaEurodimensional finite element model

被引:14
作者
Jebaseelan, D. Davidson [1 ]
Jebaraj, Chidambaram [1 ]
Yoganandan, Narayan [2 ]
Rajasekaran, S. [3 ]
机构
[1] Anna Univ, Dept Mech Engn, AU FRG Inst CAD CAM, Madras 600025, Tamil Nadu, India
[2] Med Coll Wisconsin, Dept Neurosurg, Milwaukee, WI 53226 USA
[3] Ganga Hosp P Ltd, Dept Orthopaed & Spine Surg, Coimbatore, Tamil Nadu, India
关键词
Pediatric spine; Finite element analysis; Range of motion; Flexibility; HUMAN CERVICAL-SPINE; MATERIAL PROPERTY; SPONDYLOLISTHESIS; PATHOMECHANISM; DISC;
D O I
10.1007/s11517-010-0691-1
中图分类号
TP39 [计算机的应用];
学科分类号
080201 [机械制造及其自动化];
摘要
The objective of this study was to develop a finite element model of the lumbar spinal column of an eight-year-old human spine and compare flexibilities under pure moments, adult, and pediatric loading with different material models. The geometry was extracted from computed tomography scans. The model included the cortical and cancellous bones, growth plates, ligaments, and discs. Adult, adolescent, and pediatric material models were used. Flexion (8 Nm), extension (6 Nm), lateral bending (6 Nm), and axial rotation (4 Nm) moments representing adult loads were applied to the three material models. Pediatric loading (0.5 Nm) was applied under these loadings to the eight-year-old spine using adult and pediatric material models. Flexibilities depended on spinal level, loading mode, and material model. Outputs incorporating the pediatric material model responded with increased flexibilities compared to the adult and adolescent material models, with one exception. This was true for the adult and pediatric loading conditions. While the sagittal and coronal bending responses were not considerably different between the adult and pediatric loadings, axial rotation responses were greater under the adult loading. This model may be used to determine intrinsic responses, such as stresses and strains, for improved characterizations of the juvenile spine behavior.
引用
收藏
页码:1223 / 1231
页数:9
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