期刊
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
卷 15, 期 3, 页码 543-560出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10237-015-0709-6
关键词
Intervertebral disc; Collagen distribution; Swelling pressure; Prestress
资金
- European Union [FPT7-PITN-GA-2009-238690-SPINEFX]
Patient-specific modelling of the spine is a powerful tool to explore the prevention and the treatment of injuries and pathologies. Albeit several methods have been proposed for the discretization of the bony structures, the efficient representation of the intervertebral disc anisotropy remains a challenge, especially with complex geometries. Furthermore, the swelling of the disc's nucleus pulposus is normally added to the model after geometry definition, at the cost of changes of the material properties and an unrealistic description of the prestressed state. The aim of this study was to develop techniques, which preserve the patient-specific geometry of the disc and allow the representation of the system anisotropy and residual stresses, independent of the system discretization. Depending on the modelling features, the developed approaches resulted in a response of patient-specific models that was in good agreement with the physiological response observed in corresponding experiments. The proposed methods represent a first step towards the development of patient-specific models of the disc which respect both the geometry and the mechanical properties of the specific disc.
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