PMC4392325_01
Anteroposterior radiographs of the left hip showing a dislocation of a cemented total hip arthroplasty with a stable acetabular component, at follow-up period of 4 years. After closed reduction, it was possible to observe the malposition of the acetabular component: low anteversion of the liner with an inclination angle of 57 degrees.
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PMC4392325_01_gr1.jpg
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The extraction of the liner was carried out by two cork-screws firmly screwed, as far as possible, in the rim of the all-polyethylene cemented acetabular liner.
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PMC4392325_01_gr2.jpg
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The all-polyethylene acetabular liner was perforated with a 4.5 mm drill, and two cork-screws were firmly screwed in the rim as far as possible, in order to extrude the liner from the cement mantle, and to create also fissures into the cement (Fig. 2).