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Liner Dissociation and Acetabular Erosion Treated by Implant Retention and Dual-Mobility Liner Cementation: A Case
Austin Nabet1, Oliver C Sax, James Nace
1Rubin Institute for Advanced Orthopedics, Sinai Hospital of Baltimore, Baltimore, Maryland.
Case:
A 56-year-old woman underwent a left total hip arthroplasty (THA) after developing avascular necrosis after chemotherapeutic treatment of breast cancer. She presented approximately 2 years after index THA with left groin pain and complaints of instability. Imaging revealed pseudodislocation of the ceramic femoral head with erosion through the acetabular component. Intraoperative evaluation revealed a dissociated polyethylene liner, damaged acetabular locking mechanism, metallosis, and well-fixed and aligned components. Treatment consisted of component retention, bone grafting, and dual-mobility liner cementation into the acetabular component.
Conclusions:
The two-year follow-up demonstrated a pain-free, well-functioning hip, bone graft incorporation, and no evidence of loosening.
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