Fig. 6

Nephogram of shear stress on the annulus in flexion condition. Model 1: contact model. Model 2: PTED model with normal bone mineral density. Model 3: PTED model with osteoporosis
Nephogram of shear stress on the annulus in flexion condition. Model 1: contact model. Model 2: PTED model with normal bone mineral density. Model 3: PTED model with osteoporosis