3 years ago

R3 cup does not have a high failure rate in conventional bearings: a minimum of 5 year follow up

The R3 cementless acetabular system was first marketed in Australia and Europe in 2007. Previous papers have shown high failure rates of the R3 cup with up to 24% with metal-on-metal bearing. There are currently no medium term clinical results on this cup. The aim of the study is to review our results of the R3 acetabular cup with conventional bearings with a minimum of 5 year follow up. Methods Patients who were implanted with the R3 acetabular cup were identified from our centre’s arthroplasty database. 293 consecutive total hip arthroplasties(THA) were performed in 286 patients. The primary outcome was revision. The secondary outcomes were the Oxford hip scores and radiographic evaluation. Results The mean age of the patients was 69.4 years. The mean pre-operative Oxford Hip Score was 23 (range:10-34) and the mean Oxford Hip Score was 40 (range:33-48) at the final follow-up. Radiological evaluation showed an excellent ARA-score in all patients at five years. None of the R3 cups showed osteolysis at final follow up. There were 3 revisions in our series, of which two R3 cup were revised. The risk of revision was 1.11% at 5 years. Conclusions Our experience of using the R3 acetabular system with conventional bearings showed high survivorship and is consistent with the allocated Orthopaedic Data Evaluation Panel rating of 5A* as rated in 2015 in the United Kingdom.

Publisher URL: www.sciencedirect.com/science

DOI: S0883540317308677

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