Incomplete Seating of Modular Dual Mobility Metal Liner within a Hemispherical Acetabular Shell

Abstract

This case report describes one similar seating malalignment involving dual mobility metal liner and Trident acetabular shell. CASE HISTORY59 year old male, presented with pain and difficulty in walking since 9 years. He had a history of childhood fall followed by limping for some months. A diagnosis of secondary arthritis of left hip was made, for which total hip arthroplasty was performed (Figure 1).Through posterior approach, acetabulum was serially reamed upto 44 and a 46mm (Stryker Trident PSL, Michigan, U.S.) HA cluster shell was impacted (Figure 2). One cancellous screw was put in the postero superior