Dissociation of Polyethylene Liner of the Dual Mobility Acetabular Component after Closed Reduction of Dislocation: A Case Report

• Published in: Hip & pelvis Vol. 29; no. 2; pp. 133 - 138
• Main Authors: Rhyu, Kee Hyung, Bae, Chan Il, Nam, Ju-Hyun, Bae, Jung-Gwon, Cho, Yoon Je, Chun, Young Soo
• Format: Journal Article
• Language: English
• Published: Korea (South) Korean Hip Society 01-06-2017; 대한고관절학회
• Subjects: Case Report; 정형외과학; Hip joint; Hip prosthesis; Polyethylene; Hip dislocation; Femur head
• ISSN: 2287-3260; 2287-3279
• DOI: 10.5371/hp.2017.29.2.133

A dual mobility acetabular component has a structure that combines a polyethylene liner and a femoral head, unlike the general design of acetabular cups, making the dissociation of a polyethylene liner highly unlikely. In addition, it increases the range of motion and reduces the possibility of dislocations by increasing a jump distance. A fifty-one-year-old male who had received total hip arthroplasty with the dual mobility acetabular component visited a hospital for a posterior hip dislocation 10 weeks after the operation. At the emergency room, closed reduction was performed and the dislocation was reduced. However, plain imaging test revealed polyethylene liner dissociation after the closed reduction. Revision surgery was performed. We will report a rare case of early dislocation of the dual mobility acetabular component and dissociation of polyethylene liner accompanied with a literature review.