Figure 1.

Stress distribution of the three models under compression states: the stress distribution is transmitted along the iliopectineal line in all three models, and the maximum stress value is less than the yield strength of bone. (A, B) In the ISS model, the maximum stress is located at the upper screw near the processus spinosus of the first sacral vertebra (anterior and posterior views). (C, D) In the TBP model, the maximum stress is located at the first screw near the right sacroiliac joint (anterior and posterior views). (E, F) In the MIAP model, the maximum stress is located at the upper screw near the sacroiliac joint (anterior and posterior). ISS, iliosacral screw; MIAP, minimally invasive adjustable plate; TBP, tension band plate.