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Fig. 7 | BMC Musculoskeletal Disorders

Fig. 7

From: Mild (not severe) disc degeneration is implicated in the progression of bilateral L5 spondylolysis to spondylolisthesis

Fig. 7

Average values of posteroanterior (+) and anteroposterior (−) shear stresses in the annulus fibrosus of the L5-S1 disc at peak flexion (Fx) and extension (Ex) loads of 10 Nm. The mildly degenerate L5-lytic model experienced the greatest increase in average anteroposterior stress in Fx and average posteroanterior stress in Ex from the baseline INTACT state

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