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Photoelastic analisys in the lower region of vertebral body L4
Sarah Fakher Fakhouri1, Ariane Zamarioli1, Marcos Massao Shimano2
1Department of Biomechanics, Medicine and Rehabilitation of the Musculoskeletal System of the Faculdade de Medicina de RibeirãoPreto da Universidade de São Paulo - RibeirãoPreto, SP, Brazil.
Objective:
To analyze the shear forces on the vertebral body L4 when submitted to a compression force by means of transmission photoelasticity.
Methods:
Twelve photoelastic models were divided into three groups, with four models per group, according to the positioning of the sagittal section vertebrae L4-L5 (sections A, B and C). The simulation was performed using a 15N compression force, and the fringe orders were evaluated in the vertebral body L4 by the Tardy compensation method.
Results:
Photoelastic analysis showed, in general, a homogeneous distribution in the vertebral bodies. The shear forces were higher in section C than B, and higher in B than A.
Conclusion:
The posterior area of L4, mainly in section C, showed higher shear concentrations, corresponding to a more susceptible area for bone fracture and spondylolisthesis. Economic and Decision Analyses - Development of an Economic or Decision Model. Level I.
