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Bilateral Facet Dislocations With and Without Head Impact Sustained by Restrained Occupants


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1 Thorbole Simulation Technologies, LLC, 2524 Horizon Blvd. Rogers, Arkansas - 72758, United States
     

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This paper aims to understand the different injury mechanism involved with traumatic Bilateral Facet Dislocation (BFD) and fracture of the cervical spine. The intent is to demonstrate and elucidate tensile and compression induced injury mechanisms producing BFD by employing real-world crash investigations in association with all the past laboratory testing and studies done by numerous researchers. The study indicates that in a frontal crash scenario, maintaining the position of the shoulder belt is paramount, and any migration towards the base of the neck allows the fulcrum formation that amplifies distractive moments on the neck producing BFD. Similarly, in a rollover crash scenario, roof intrusion magnitude, and its rate along with roof deformation pattern can impose a rotational constraint on the head and plays a vital role in producing BFD. Roof design must address the formation of pocketing in the roof due to deformations imposing rotational head constraint exposing neck to buckling and subsequent BFD as the roof intrusion continues.

Keywords

Frontal crash scenario, Human cervical spine, Bilateral Facet Dislocation (BFD), Head impact, Rollover crash scenario, Zygapophysial joints, Neural arch, Safety.
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  • Allen Jr, B. L., R. L. Ferguson, THOMAS R. Lehmann, and R. P. O'brien. "A mechanistic classification of closed, indirect fractures and dislocations of the lower cervical spine." Spine 7, no. 1 (1982): 1-27. https://pubmed.ncbi.nlm.nih.gov/7071658/

  • Daffner, Scott D., and Richard H. Daffner. "Computed tomography diagnosis of facet dislocations: the “hamburger bun” and “reverse hamburger bun” signs." The Journal of emergency medicine 23, no. 4 (2002): 387-394. https://pubmed.ncbi.nlm.nih.gov/12480021/

  • Ivancic, Paul C., Manohar M. Panjabi, Yasuhiro Tominaga, Adam M. Pearson, S. Elena Gimenez, and Travis G. Maak. "Spinal canal narrowing during simulated frontal impact." European spine journal 15, no. 6 (2006): 891-901. https://pubmed.ncbi.nlm.nih.gov/16220351/

  • Ivancic, Paul C., Adam M. Pearson, Yasuhiro Tominaga, Andrew K. Simpson, James J. Yue, and Manohar M. Panjabi. "Mechanism of cervical spinal cord injury during bilateral facet dislocation." Spine 32, no. 22 (2007): 2467-2473. https://pubmed.ncbi.nlm.nih.gov/18090087/

  • Gomes, Shanda, Scott Rudkin, Fong Tsai, and Shahram Lotfipour. "Bilateral cervical spine facet fracture-dislocation." The western journal of emergency medicine 10, no. 1 (2009): 19. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2672293/

  • Panjabi, Manohar M., Andrew K. Simpson, Paul C. Ivancic, Adam M. Pearson, Yasuhiro Tominaga, and James J. Yue. "Cervical facet joint kinematics during bilateral facet dislocation." European Spine Journal 16, no. 10 (2007): 1680- 1688. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2078308/

  • Shanahan, Dennis F. "Shoulder belt-induced flexion– distraction fractures of the cervical spine." International Journal of Crashworthiness 18, no. 6 (2013): 559-569.[ https://www.tandfonline.com/doi/abs/10.1080/13588265.2013. 825387

  • Smith, William S., and Herbert Kaufer. "Patterns and mechanisms of lumbar injuries associated with lap seat belts." JBJS 51, no. 2 (1969): 239-254. https://pubmed.ncbi.nlm.nih.gov/5767317/

  • Huelke, Donald F., G. Murray Mackay, Andrew Morris, and Maureen Bradford. "A review of cervical fractures and fracture-dislocations without head impacts sustained by restrained occupants." Accident Analysis & Prevention 25, no. 6 (1993): 731-743. https://pubmed.ncbi.nlm.nih.gov/8297440/

  • Nusholtz, Guy S., D. E. Huelke, P. Lux, Nabih M. Alem, and F. Montalvo. Cervical spine injury mechanisms. No. 831616. SAE Technical Paper, 1983.[ https://www.sae.org/publications/technicalpapers/ content/831616/

  • Nightingale, Roger W., William J. Richardson, and Barry S. Myers. "The effects of padded surfaces on the risk for cervical spine injury." Spine 22, no. 20 (1997): 2380-2387. https://pubmed.ncbi.nlm.nih.gov/9355219/

  • Bauze, ROBERT J., and Gordon M. Ardran. "Experimental production of forward dislocation in the human cervical spine." The Journal of bone and joint surgery. British volume 60, no. 2 (1978): 239-245. [https://pubmed.ncbi.nlm.nih.gov/659473/]

  • Hodgson, Voigt R., and L. Murray Thomas. "Mechanisms of cervical spine injury during impact to the protected head." SAE Transactions (1980): 3792-3805. https://www.sae.org/publications/technicalpapers/ content/801300/

  • Nightingale, Roger W., James H. McElhaney, Daniel L. Camacho, Michael Kleinberger, Beth A. Winkelstein, and Barry S. Myers. "The dynamic responses of the cervical spine: buckling, end conditions, and tolerance in compressive impacts." SAE transactions (1997): 3968-3988. https://www.sae.org/publications/technicalpapers/content/973 344/

  • Adomeit, Dieter, and Alfred Heger. "Motion sequence criteria and design proposals for restraint devices in order to avoid unfavorable biomechanic conditions and submarining." SAE Transactions (1975): 3150-3159. https://www.sae.org/publications/technicalpapers/content/751 146/

  • Thorbole, Chandrashekhar K. "Seatbelt submarining injury and its prevention countermeasures: How a cantilever seat pan structure exacerbates submarining." Journal of family medicine and primary care 4, no. 4 (2015): 587. https://pubmed.ncbi.nlm.nih.gov/26985421/

  • Thorbole, Chandrashekhar K., and Prashant Naik. "role of traumatic seatbelt fat stranding in automotive crash injury analysis." 26th ESV Conference, Eindhoven Netherlands,[ https://www-esv.nhtsa.dot.gov/Proceedings/26/26ESV- 000137.pdf

  • Thorbole, Chandrashekhar K. "Dangers of seatback recline in a moving vehicle: how seatback recline increases the injury severity and shifts injury pattern." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers Digital Collection, 2015. https://asmedigitalcollection.asme.org/IMECE/proceedingsab stract/IMECE2015/57380/V003T03A056/264306


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  • Bilateral Facet Dislocations With and Without Head Impact Sustained by Restrained Occupants

Abstract Views: 96  |  PDF Views: 0

Authors

Chandrashekhar K. Thorbole
Thorbole Simulation Technologies, LLC, 2524 Horizon Blvd. Rogers, Arkansas - 72758, United States

Abstract


This paper aims to understand the different injury mechanism involved with traumatic Bilateral Facet Dislocation (BFD) and fracture of the cervical spine. The intent is to demonstrate and elucidate tensile and compression induced injury mechanisms producing BFD by employing real-world crash investigations in association with all the past laboratory testing and studies done by numerous researchers. The study indicates that in a frontal crash scenario, maintaining the position of the shoulder belt is paramount, and any migration towards the base of the neck allows the fulcrum formation that amplifies distractive moments on the neck producing BFD. Similarly, in a rollover crash scenario, roof intrusion magnitude, and its rate along with roof deformation pattern can impose a rotational constraint on the head and plays a vital role in producing BFD. Roof design must address the formation of pocketing in the roof due to deformations imposing rotational head constraint exposing neck to buckling and subsequent BFD as the roof intrusion continues.

Keywords


Frontal crash scenario, Human cervical spine, Bilateral Facet Dislocation (BFD), Head impact, Rollover crash scenario, Zygapophysial joints, Neural arch, Safety.

References





DOI: https://doi.org/10.37285/ajmt.1.2.1