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Application of Finite Element Techniques to the Study of Cervical Spine Mechanics
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Stapp Car Crash Conference
Language:
English
Abstract
A three-dimensional finite element model of a human ligamentous cervical spine was developed to study the mechanics of cervical injuries related to automotive crashes. Patran and LS-DYNA3D were used to create this preliminary model consisting of the cervical vertebrae, intervertebral discs, and biomechanically relevant spinal ligaments. Material properties were obtained from published experimental data. A rigid head was included to provide proper application of non-contact inertial loading.
Model development began with the generation of a single cervical motion segment. This model was subjected to a variety of loading conditions to provide a qualitative check of material properties and tissue interface conditions. Based on this motion segment model, a complete cervical model was developed including an attached rigid head.
Simulations were run for axial compression and frontal flexion. A small strain axial stiffness of 161.8 N/mm was determined for the case of pure z-displacement of the occiput. Large strain compression exhibited anterior bending of the cervical column and an overall stiffness value of 161.1 N/mm. Gross vertebral kinematics and deformation shapes compared well with experimental data from Pintar et al [29]. The analytical flexion response predicted that head rotation would lag behind neck rotation by roughly 20 degrees, which is less than the roughly 30 degrees observed for volunteer sled test data.
Planned future enhancements include refinement of the vertebral geometry, improvement of the material definition for soft tissue components, and addition of musculature to the ligamentous spine model. An experimental study has begun which will provide essential data for these enhancements. Further validation of this model will be conducted upon completion of these experiments.
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Citation
Kleinberger, M., "Application of Finite Element Techniques to the Study of Cervical Spine Mechanics," SAE Technical Paper 933131, 1993, https://doi.org/10.4271/933131.Also In
References
- Baughman LD. Development of an interactive computer program to produce body descriptive data. Dayton Ohio Univ. Research Institute, AFAMRL-TR-83-058, NTIS No. AD-A133 720, 1983.
- Belytschko Tet al. Finite element stress analysis of an intervertebral disc. J Biomechanics 7:277, 1974.
- Breklemans WAMet al. A new method to analyze the mechanical behavior of skeletal parts. Acta Orthop Scand 43:301, 1972.
- Goel VKet al. An analytical investigation of the mechanics of spinal instrumentation. Spine 13(9):1003-1011, 1988.
- Hakim NS and King AI. Static and dynamic articular facet loads. Proc. 20th Stapp Car Crash conference, SAE paper no. 760819, pp.609-639, 1976.
- Hakim NS and King AI. A three dimensional finite element dynamic response analysis of a vertebra with experimental verification. J Biomechanics 12:277-292, 1979.
- Hardy CH and Marcal PV. Elastic analysis of a skull. Technical Report No. 8, Office of Naval Research, Contract No. 00014-67-A-091-0007, Division of Engineering, Brown University, Providence, RI, 1971.
- Hess JL and Lombard CF. Theoretical investigations of dynamic response of man to high vertical accelerations. J Aviat Med 29:66, 1958.
- Krause HE and Shirazi M. The transverse response of human lumbar spine under longitudinal loads. Symp. Biodynamic Models and Their Applications, AMRL-TR-71-29, Aerospace Medical Research Laboratory, Wright Patterson Air Force Base, Dayton, Ohio, p.621, 1971.
- Kulak RFet al. Non-linear behavior of the human intervertebral disc under axial load. J Biomechanics 9:377, 1976.
- Latham F. A study on body ballistics: seat ejections. Proc R Soc London Ser 147B:121, 1957.
- Lavaste Fet al. Three-dimensional geometrical and mechanical modelling of the lumbar spine. J Biomechanics 25(10):1153-1164, 1992.
- Li TFet al. The effect of initial curvature on the dynamic response of spine to axial acceleration. Symp. Biodynamic Models and Their Applications, AMRL-TR-71-29, Aerospace Medical Research Laboratory, Wright Patterson Air Force Base, Dayton, Ohio, p.553, 1971.
- Liu YK and Murray JD. A theoretical study of the effect of impulse on human torso, in Biomechanics. Fung YC ed., ASME, New York, p.167, 1966.
- Liu YK and Ray G. A finite element analysis of wave propagation in the human spine. AMRL-TR-73-40, Aerospace Medical Research Laboratory, Wright Patterson Air Force Base, Dayton, Ohio, 1973.
- Liu YK and Ray G. Systems identification scheme for the estimation of linear visco-elastic properties of the intervertebral disc. Aviat Space Environ Med 49:175,1978.
- Maiman DJ and Yoganandan N. Biomechanics of cervical spine trauma. In Clinical Neurosurgery, Congress of Neurological Surgeons, Williams and Wilkins, Baltimore, MD, 1991.
- McElhaney JHet al, Handbook of Human Tolerance Japan Automobile Research Institute, Inc., Tokyo, Japan, 1976.
- McElhaney Jet al. Etiology of trauma to the cervical spine. In Impact Injury of the Head and Spine; Ewing CL, Thomas DJ, Sances A Jr., and Larson SJ, eds.; Charles C. Thomas, Springfield, IL, p.41, 1983.
- McElhaney JH et al. Cervical spine compression responses. Proc. 27th Stapp Car Crash Conference, SAE Paper No. 831615, San Diego, CA, pp.163-177, 1983.
- Moffatt CA et al. Analytical and experimental investigation of the human spine flexure. ASME Paper No. 71, p.58, 1971.
- Myers BSet al. The influence of end condition on human cervical spine injury mechanisms. Proc. 35th Stapp Car Crash Conference, SAE Paper No. 912915, San Diego, CA, pp.391-399, 1991.
- Myklebust JBet al. Tensile strength of spinal ligaments. Spine 13(5):526-531, 1988.
- Nyquist GW and King AI. Spine. In Review of Biomechanical Impact Response and Injury in the Automotive Environment. DOT HS 807 042, 1985.
- Panjabi MMet al. Cervical spine mechanics as a function of transection of components. J Biomechanics 8:327-336, 1975.
- Panjabi MMet al. Cervical human vertebrae: Quantitative three-dimensional anatomy of the middle and lower regions. Spine 16(8):861-869, 1991.
- Panjabi MMet al. Quantitative anatomy of cervical spine ligaments. Part II, Middle and lower cervical spine. J Spinal Disorders 4(3):277-285, 1991.
- Payne PR. Injury potential of ejection seat cushions. J Aircr 6:273, 1969.
- Pintar FAet al. Kinematic and anatomical analysis of the human cervical spinal column under axial loading. Proc. 33rd Stapp Car Crash Conference, SAE Paper No. 892436, Washington, DC, pp.191-214, 1989.
- Pintar FAet al, Biomechanical properties of human lumbar spine ligaments. J Biomechanics 25(11):1351-1356, 1992.
- Reber JG and Goldsmith W. Analysis of large head neck motions. J Biomechanics 12:211, 1979.
- Roberts SB and Chen PH. Elasto static analysis of the human thoracic skeleton. J Biomechanics 3:527, 1970.
- Sances Aet al. The biomechanics of spinal injuries. CRC Crit Rev Biomed Eng 11(1):1, 1984.
- Shirazi-Adl Aet al. Stress analysis of the lumbar disc-body unit in compression: a three-dimensionalnonlinear finite element study. Spine 9:120-134, 1984.
- Shirazi-Adl Aet al. Mechanical response of a lumbar motion segment in axial torque alone and combined with compression. Spine 11:914-927, 1986.
- Soechting JF and Paslay PR. A model for the human spine during impact including musculature influence. J Biomechanics 6:195, 1973.
- Terry CT and Roberts VL. A viscoelastic model of the human spine subjected to +Gz acceleration. J Biomechanics 1:161, 1968.
- Toth R. Multiple-degree-of-freedom, non-linear spinal model. Proc 19th Ann Conf Eng Med Biol 8:102, 1966.
- Ueno K and Liu YK. A three dimensional nonlinear finite element model of the lumbar intervertebral joint in torsion. J Biomech Eng 109:200-209, 1987.
- White AA and Panjabi MM. Clinical Biomechanics of the Spine. J. B. Lippincott Company, Philadelphia, PA, 1978.
- Williams JL and Belytschko TB. A three-dimensional model of the human cervical spine for impact simulations. J Biomech Eng 105:321, 1983.
- Wismans J and Spenny CH. Head-neck response in frontal flexion. Proc. 28th Stapp Car Crash Conference, SAE Paper No. 841666, Chicago, IL, pp. 161-171, 1984.
- Wismans J et al. Comparison of human volunteer and cadaver head-neck response in frontal flexion. Proc. 31st Stapp Car Crash Conference, SAE Paper No. 872194, New Orleans, LA, pp. 1-13, 1987.
- Yamada H. Strength of Biological Materials. Evans FF ed.; Williams and Wilkins Co., Baltimore, MD, 1970.
- Yang KH and King AI. Mechanisms of facet load transmission as a hypothesis for low back pain. Spine 9(6):557-565, 1984.
- Yoganandan Net al. Biomechanical evaluation of the axial compressive responses of the human cadaveric and manikin necks. J Biomech Eng 111:250-255, 1989.
- Yoganandan Net al. Mathematical and finite element analysis of spine injuries. CRC Critical Reviews in Biomedical Engineering 15(1):29-93, 1987.
- Yoganandan Net al. Dynamic response of human cervical spine ligaments. Spine 14(10): 1102-1110, 1989.
- Yoganandan Net al. Stiffness and strain energy criteria to evaluate the threshold of injury to an intervertebral joint. J Biomechanics 22(2):135-142, 1989.
- Yoganandan Net al. Strength and motion analysis of the human head-neck complex. J Spinal Disorders 4(1):73-85, 1991.