DOS 2018

234 · DOS Abstracts Arcos Revision stem single center retrospective data collection with follow-up Naima Elsayed, Karen Dyreborg, Nikolaj Winther, Jens Stûrup, Michael Mørk Petersen orthopedic , Rigshospitalet Background: The Biomet® Modular Revision Femoral System (Arcos Hip) is a comprehensive, press-fit revision stem design that provides the surgeon with multiple styles of modular proximal and distal bodies for reconstruction of vari- ous defects commonly seen in femoral revision surgery. It was introduced to the Danish hospitals in 2011 and there has been a limited amount of data presented on this implant. Purpose / Aim of Study: The purpose of this study is to assess the perfor- mance and evaluate the early results after femoral revision with the use of Arcos Hip. Materials and Methods: In September 2011 to December 2016, 82 patients at Rigshospitalet received an Arcos hip, and 78 patients (mean age=69 (24- 91) years, F/M=40/38) were included in the study with a follow up of 1.5 to 7 years. 4 patients were excluded due to the use of the system for a more compli- cated surgical problem. The primary endpoint was a re-revision using data from the Danish Hip Arthroplasty Registry, the Patient Administrative System and the National Patient Registry. The secondary endpoints are complications (dis- location, fracture, aseptic loosening, infection), the present function of the hip including Harris Hip Score, Oxford Hip Score, EQ5D, and radiographic evaluation Findings / Results: 11 patients died in the interim and were consequently only included in the survivorship analysis. The early results showed that 12 hips (15,4 %) had complications resulting in fracture (n=3), dislocation (n=8) or soft tissue revision (n=1). Furthermore, in 4 of the patients (5,1%) the Arcos Hip was replaced with a different hip prosthesis. The probability of implant survival at 1 and 5 year was unchanged 94,7% (95%-CI: 89,7% - 99,8%) Conclusions: The early results showed an acceptable survival of the implant and a promising outcome with the use of the Arcos Hip in a highly specialized hip revision unit. 175.