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Of anterior column, posterior column, and transverse fractures in the study by Vrahas, et al 1999, a cadaveric biomechanical study was performed to determine the relative stability Ring (otherwise fracture would be a T fracture) ilioischial and iliopectineal lines are both disrupted, but there will be no involvement of the obturator stemming from the lateral compressive force these fracture may also be assoc mechanism: blow directly upon greater trochanter Wall fragment, or w/ pubic ramus fracture may be difficult to reduce in the presence of a transverse transtectal component, large posterior infratectal: fracture courses below the wt bearing dome juxtatectal: fracture courses above the cotyloid fossa, so that a significant portion of the wt transtectal: fracture courses through the weight-bearing dome (WBD) transverse fracture are sub-classified according to location relative to the wt bearing dome if both anterior & posterior columns are broken, then it is called transverse fracture, and if bothĬolumns are broken & separated from each other, that is T fracture Roof and intact ilium, & inferior segment consisting of single ischiopubic frx divides the innominate bone into superior segment containing acetabular transverse frxs extend across both the anterior and posterior columns Associated Transverse & Posterior Wall Fracture