Displacement Pattern of Anterior and Posterior Column Fragments in Both-Column Acetabular Fractures: A 3D Reconstruction-Based Study
Table 3
Displacement distance and direction of marked points and rotation angle for the PC fragment.
Parameter
Distance† (mm or °)
Direction‡
value
Positive sign
Negative sign
IT point
x-axis
4.60 (10.72)
62 (76.5)
19 (23.5)
<0.001
y-axis
-1.17 (6.11)
33 (40.7)
48 (59.3)
0.119
z-axis
2.88 (4.68)
63 (77.8)
18 (22.2)
<0.001
Spatial
8.92 (8.08)
—
—
PCL point
x-axis
6.04 (8.85)
71 (87.7)
10 (12.3)
<0.001
y-axis
-0.02 (6.33)
38 (46.9)
43 (53.1)
0.657
z-axis
1.81 (4.09)
62 (76.5)
19 (23.5)
<0.001
Spatial
8.67 (7.88)
—
—
PCA point
x-axis
12.52 (8.29)
81 (100)
0 (0)
<0.001
y-axis
1.20 (5.04)
49 (60.5)
32 (39.5)
0.075
z-axis
5.16 (5.47)
71 (87.7)
10 (12.3)
<0.001
Spatial
15.02 (9.00)
—
—
PCP point
x-axis
11.71 (8.35)
81 (100)
0 (0)
<0.001
y-axis
-0.34 (5.94)
38 (46.9)
43 (53.1)
0.657
z-axis
6.10 (7.01)
73 (90.1)
8 (9.9)
<0.001
Spatial
14.51 (7.97)
—
—
Angle β
3.81 (7.49)
81 (100)
0 (0)
<0.001
†, Data are given as the median and interquartile range (IQR). ‡, Data are presented as counts (percentages). , Binomial test was applied for the displacement direction.
