Fig. 3

Nomogram for the intradiscal cement leakage. Mark the values at each factor axis, acquire the corresponding points at the points axis, and sum up the points of all factors. Mark the total points on the total point axis and draw a perpendicular line towards the risk of leakage axis. The value on the bottom line gives the probability of the cement leakage. Upper endplate disruption: yes = 1, no = 0