Fig. 7

Difference in micromotion (mean [standard error]) for each point with and without radiolucent lines (RLs). There is no significant difference between Zone 1 (RL+: 0.005928 [0.001226], RL-: 0.005055 [0.0004913]) and Zone 2 (RL+: 0.00120 [0.0003337], RL-: 0.0004818 [0.00002564]), however, in Zone 3 (RL+: 0.01595 [0.001502], RL-: 0.006883 [0.001927]), the micromotion is significantly larger in the RL+ group than in the RL- group. ** Unpaired t-test (p < 0.05)