High Rate of Ceramic Sandwich Liner Fracture

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Abstract
Tural rigidity was introduced. Fractures of these devices also were reported subsequently, although the incidence is unclear and it is unknown whether there are any risk factors associated with the fractures. Questions/purposes We therefore determined the incidence of these fractures. Methods We retrospectively reviewed 298 active patients in whom we implanted 353 ceramic-polyethylene sandwich liner acetabular components between November 1999 and February 2008. The mean age of the patients was 53.6 years (range, 17-84 years). The minimum followup was 6 months (mean, 41 months; range, 6-106 months). All patients were assessed clinically and radiographically. Results Seven of the 353 (2%) ceramic sandwich liners fractured at a mean of 4.3 years (range, 1.3-7.6 years) after surgery without trauma. Neither patient-related factors nor radiographic position of the implants were risk factors for fracture. Conclusions Owing to the high rate of fractures of the sandwich ceramic polyethylene liners in our patients, we have discontinued use of this device. Level of Evidence Level IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence....

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