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Benevenia et al.4 stated that intra and post operative judet and obturator views were the most consistent in showing the placement of the prosthesis.
Cottias et al.16 found that obturator oblique, alar views as well as AP and sagittal were most helpful. Furthermore, he found that upward migration was best evaluated on successive films (did not mention which view) by measuring distance between base of intermediate component and straight line tangential to inferior border of SI joints.
Mark II Prosthesis
Above left: Normal AP. Above right: Normal Oblique. Note how saddle cradles ilium.15
Above: Normal Axial CT. Ilium situated between saddle prongs. Incidentally noted right SI joint subluxation.15
Normal AP images