Clinical orthopaedics and related research
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Clin. Orthop. Relat. Res. · Feb 2010
Reintervention after mobile-bearing Oxford unicompartmental knee arthroplasty.
Medial compartment osteoarthritis is a common disorder that often is treated by unicompartmental knee arthroplasty (UKA). Although the Oxford 3 prosthesis is commonly used based on revision rate and cumulative survival, our experience suggests that although there may be adequate implant survival rates, we observed a worrisome and undisclosed reintervention rate of nonrevision procedures. ⋯ Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.
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Clin. Orthop. Relat. Res. · Feb 2010
Hip resurfacing data from national joint registries: what do they tell us? What do they not tell us?
Current-generation metal-on-metal hip resurfacing implants (SRAs) have been in widespread global use since the 1990s, and in the United States, specific implants have recently been approved for clinical use. Many recent publications describe short-term survivorship achieved by either implant-designing surgeons or high-volume centers. National joint replacement registries (NJRRs) on the other hand report survivorship achieved from the orthopaedic community at large. ⋯ Diagnoses other than primary osteoarthritis bear a higher risk of early revision of SRA as compared with THA. Revision of SRA does not lead to reproducible results with rerevision rates of 11% at 5 years. Given these predictors of failure, our review of data from the NJRR suggests stringent patient selection criteria might enhance the survival rates of SRA.