Fig. 2

A showed the view of hemi-pelvic specimen. B showed the attachment of the pelvis to the testing machine. 1: force sensor, 2: fixture, 3: horizontal platform, 4: NDI optotrak certus, 5: loading rod, 6: loading point in ASIS, 7: marker. C and D showed the upper part and lower part of ASL. The “O” point was the intersection of the black dashed line and the red dashed line and it was the cutoff point between the upper part and lower part of ASL. The black dashed line showed the SIJ. The red dashed line showed the arcuate line. E and F showed the MOP-F1 and MOP-F2 were applied to the hemi-pelvis specimen, respectively. Line a presented sagittal plane of pelvis. Line b presented the direction of loading force. ASIS: Anterior superior iliac spine. ASL: Anterior sacroiliac ligament. MOP: Manipulation of oblique pulling