Comparison of Biomechanical Characteristics and Pelvic Ring Stability Using Different Fixation Methods to Treat Pubic Symphysis Diastasis

摘要: The intention of this study was to compare the biomechanical characteristics using 5 internal fixation methods used clinically stabilize a pubic symphysis diastasis (PSD, Tile type B1).A 3-dimensional finite element model PSD simulated implants, including single superior plate (Single-Plate), and anterior (Dual-Plate), cannulated screw (Single-Screw), crossed dual screws (Cross-Screw), parallel (Para-Screw). Three loads were distributed in all models, dual-leg standing, single-leg stance, rotation. To evaluate properties, construct stiffness, stress distribution, von Misses recorded analyzed. pelvic ring stability, micromotion iliosacral joint analyzed.Disruption dramatically decreased stability. Cross-screw Para-Screw showed higher stiffness than other methods. All implants endured maximum under stance. For Plate-Screw system, occurred at place where it strides over adjacent interface. implant had tendency fail. best effect conditions. antishearing force capacity Dual-Plate provided antihorizontal stabilization for posterior ring.This advantages dual-implant only from view. high 3 load better obtained by Therefore, Cross-Screw should be preferred treatment