人工股関節置換術後に polyethylene liner の脱転をきたした1症例

抄録

We present a case with dissociation of the polyethylene liner after total hip arthroplasty.
In 1986, a 64-year-old woman with osteoarthrosis was treated with cementless total hip arthroplasty. She remained almost free of symptoms for ten years after the operation.
In 1996, dissociation of the polyethylene liner from the metal shell occurred after the patient fell down. This dissociation was due to failure of the liner-locking mechanism.
At revision, severe metallosis, which mainly consisted of titanium, was found around the hip joint. The metal shell, which was well fixed to the bone, was removed with curved osteotomes. After reaming of the acetabulum, a new acatabular component was implanted.
Postoperative course was good.