Case Report

Acetabular Liner Dissociation following Total Hip Arthroplasty: A Rare but Serious Complication That May Be Easily Misinterpreted in the Emergency Department

Figure 4

(a) Demonstrates shell Anti-Rotation Device (ARD) scallops which accept liner ARD tabs to enhance locking mechanism stability. (b) Normal appearance of polyethylene liner (6 ARD tabs highlighted in red) versus abnormal polyethylene liner in liner dissociation (failure of multiple ARD tabs).
(a)
(b)