Comparison of biomechanical study of sacroiliac fixation between screw with two types of washer

In the present work, compared the biomechanical behavior of the hemi-pelvis right, sacrum and effects to sacroiliac joint. Hemi-pelvis right, sacrum made of solid foam model. Sacroiliac joint disruption, the fracture was fixed using washer with either PSU washer or old washer. The whole hemi-pelvis right, sacrum was pressured to simulate closely the real life double-leg stance. The supporting jig were specially designed Hemi-pelvis right, sacrum were tested on an Instron testing machine. Eccentric compressive force from 0 until failure for failure test. The specimens were then submitted to force applied vertically at the sacroiliac joint. Relative the force at failure of the sacroiliac joint was measured and compare. The specimens fixed with PSU washer presented greater than old washer.