Mechanics Characteristic Research of Human Lumbar Spine Based on the Changed Gradient for 3-D Printer

Abstract:

According to the spinal anatomy data, three-dimensional geometric model of human lumbar spine L3-L5 segment is established in this paper. In the model, the vertebra is divided into cortical bone, cancellous bone, endplate and other structures. The connection between the vertebrae and intervertebral disc is simulated as contact joint. The material properties of lumbar parts of the structure are not the same, the elastic modulus is changing in the analysis. Based on the model, the deformation of the lumbar spine under different size of axial force and lateral torque is simulated. The simulation result shows the variation regularity of the deformation of vertebrae and intervertebral disc under the condition of different pressure. This research provides a quantitative reference for spinal bio-mechanics. The human spine model with a gradient change sets the foundation for processing field of artificial joint using the 3D printing technology.

• Periodical: Advanced Materials Research (Volume 988)
• Pages: 449-452
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.988.449
• Online since: July 2014
• Authors: Bo Zhang, Heng Zhi Cai, Gang Zhou, Ya Jun Zhang, Jian Zhuang
• Keywords: 3D Printing, Finite Element Model (FEM), Gradient Changing, Lumbar Spine

References

[1] Fang yan Li. Research on the biomechanical properties of spine based on the 3D finite element model[D]. (2009).

[2] Ruiqing Du，Yi guo Chen, et al．Overview of spinal biomechanics analysis by finite element method [J] , Beijing Biomedical Engineering, 2004, 23（1）：77-80.

[3] Jan K，Petra K，Martin B，et al．3D segmentation and finite element modelling of spine segments：CARS2003：proceeding of the 17thInternational Congress and Exhibition， March 16， 2003[C]．[S. l]：International Congress Series，2003，1256：41-46.

DOI: 10.1016/s0531-5131(03)00401-1

[4] Natarajan R N．Finite element model of a lumbar spinal motion segment to predict circadian variation in stature[J]． Computers and Structures，2003，81：835-842.

DOI: 10.1016/s0045-7949(02)00400-5

[5] Shirazi-Adl A, Sadouk S, Parnianpour M, et al. Muscle force evaluation and the role of posture in human lumbar spine under compression [J]. European Spine Journal (S0940-6719), 2002, 11(6): 519-26.

DOI: 10.1007/s00586-002-0397-7

[6] Zander T, Rohlmann A, Calisse J. Estimation of muscle forces in the lumbar spine during upper-body inclination [J]. Clinical Biomechanics (S0268-0033), 2001, 16(S1): S73-80.

DOI: 10.1016/s0268-0033(00)00108-x

[7] HaiYa, Wei Yong Gu. Three-dimensional inhomogeneous triphasic finite-element analysis of physical signals and solute transport in human intervertebral disc under axial compression[J]. Journal of Biomechanics, 2007, 40: 2071-(2077).

DOI: 10.1016/j.jbiomech.2006.10.001