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Inlet pelvis
1%
78/6801
Outlet pelvis
92/6801
Anteroposterior pelvis
44/6801
Obturator oblique pelvis
85%
5802/6801
Iliac oblique pelvis
11%
756/6801
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The posterior wall is best visualized on the obturator oblique pelvic view. The obturator oblique and iliac oblique views make up the Judet views that are used to evaluate acetabular fractures, along with a standard AP pelvis radiograph. The obturator oblique pelvic view is best to view the anterior column and posterior wall in detail. The iliac oblique shows the profile of involved iliac wing, the posterior column, and the anterior wall. Letournel reviewed his classification and treatment protocols, based on his 22 years of experience at that time. He noted that perfect anatomical reduction of the acetabulum led to the best outcomes. Patel et al reviewed of the Letournel classification, and they found moderate to high inter- and intra-observer reliability with this classification system. The presence of articular displacement, marginal impaction, incongruity, intra-articular fragments and osteochondral injuries to the femoral head were found to have less reliability (intra- and interobserver). Illustration A shows a right-sided obturator oblique radiograph, while Illustration B shows a right-sided iliac oblique radiograph. Illustration C shows a diagram of the obturator oblique radiograph, with the radiographic lines marked out. Incorrect Answers: Answers 1: Inlet pelvic imaging is best for assessing pelvic ring injuries (rotation and anterior-posterior or medial-lateral translation). Answers 2: Outlet pelvic imaging is best for assessing pelvic ring injuries (proximal-distal translation, rotation). Answers 3: AP pelvis is a good screening tool for pelvic and acetabular fractures. Answers 5: Iliac oblique pelvis is best for assessing the posterior column and anterior wall of the acetabulum.
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