Failure of Cement-in-Shell Acetabular Liner Exchange

Cement-in-shell acetabular liner exchange is a revision surgery option for cases of total hip arthroplasty (THA) with polyethylene wear where direct liner exchange is not possible. A replacement liner is cemented into a well fixed uncemented acetabular shell, avoiding the morbidity associated with acetabular shell component revision. We present a case of dissociation of an acetabular liner at the cement-liner interface, three years following liner exchange without radiographic evidence to indicate the diagnosis.