1. Liner dissociation leading to catastrophic failure of an Oxinium femoral head
- Author
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Afshin A. Anoushiravani, David Novikov, Ran Schwarzkopf, Anthony H. Zou, Jonathan M. Vigdorchik, and James E. Feng
- Subjects
musculoskeletal diseases ,medicine.medical_specialty ,Case Report ,Failure mechanism ,Dual-mobility system ,03 medical and health sciences ,Femoral head ,0302 clinical medicine ,lcsh:Orthopedic surgery ,Oxidized zirconium ,Bearing surface ,medicine ,Metallosis ,Orthopedics and Sports Medicine ,030212 general & internal medicine ,Liner dissociation ,030222 orthopedics ,business.industry ,Polyethylene liner ,Total hip replacement ,medicine.disease ,Surgery ,lcsh:RD701-811 ,medicine.anatomical_structure ,Catastrophic failure ,Oxinium ,Total hip arthroplasty ,business - Abstract
Oxinium is an alternative bearing surface designed to emulate the superior wear and scratch properties of ceramic femoral heads in total hip arthroplasty while minimizing the risk for brittle fracturing. However, recent studies have indicated that hip dislocation following total hip arthroplasty may be a risk factor for catastrophic failure of the femoral head. Here, we report on a novel case of a catastrophic Oxinium head and polyethylene liner failure in the absence of previous hip dislocation or trauma and review the probable failure mechanism. This report underscores the need to be vigilant about proper acetabular cup and liner seating, particularly in the setting of Oxinium femoral head use. In the event of Oxinium head failure, metallosis may compromise stabilizing soft tissues including the abductors. Dual-mobility articulation, which was successful in this case, is one option to consider when the risk for chronic redislocation is elevated. Keywords: Liner dissociation, Dual-mobility system, Oxinium, Oxidized zirconium, Total hip arthroplasty, Total hip replacement
- Published
- 2019