Three Cases of Dislodgement of Polyethylene Liner after Total Hip Arthroplasty

Abstract

Dislodgement of the polyethylene liner is an increasingly common complication following total hip arthroplasty. We present three cases of dislodgement of the polyethylene liner after total hip arthroplasty using the Harris-Galante porous acetabular component.
At the revision surgery, some tines of the metal shell were broken and the grasping points of the polyethylene liner were severely damaged. Metallosis around the joint was also observed. These dislodgements are considered to have been caused by the failure of the liner-locking mechanism. In each case, postoperative course was good.
These results indicate the need to recognize the importance of early treatment for postoperative mechanical failure.