Fig. 1From: Effect of preoperative contralateral foramen stenosis on contralateral root symptoms after unilateral transforaminal lumbar interbody fusion: a ambispective cohort study1a. Cobb angle between vertebrae: the angle between the upper and lower endplates of the same segment before and after operation; 1b. vertebral slip distance: changes in relative slip distance before and after surgeryBack to article page