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Purpose A new in vivo rabbit model was developed to investigate the effects of shear force on intervertebral disc (IVD). Methods Japanese white rabbits ( n = 38) were used for this study. The L4/5 discs in Group A ( n = 10) were subjected to a constant shear force (50 N) using a custom-made external loading device for 1 month; in Group B ( n ...
Purpose To evaluate the relationship between height ratio of the iliac crest to L4 (HR), width ratio of the iliac crest to L4 (WR) and L5–S1 disc degeneration. Methods On T2-weighted sagittal images of the 50 randomly selected patients, two observers graded L5–S1 discs and some other parameters were measured. Then, relative signal intensity (RSI) of the L5–S1 nucleus pulposus was calculated. On...
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