DOS 2020

206 · DOS Abstracts Cementless one-stage revision in early periprosthetic hip joint infection (PJI) - A single- center, retrospective case series. Kristoffer Riemer, Thomas Prynø, Jeppe Lange Elective Surgery Center, Silkeborg Regional Hospital, HE Midt; Elective Surgery Center, Silkeborg Regional Hospital; Orthopaedic Surgery, Horsens Regional Hospital Background: Treatment of early PJI remains a substantial challenge to the or- thopedic surgeon. Until now debridement, antibiotics and implant retention (DAIR) has been the gold standard, but with a frequently reported infection control rate of 60% there is room for improvement. Cementless one-stage revi- sion of chronic PJI by the CORIHA protocol has been evaluated positively with a 93% success rate. Whether this protocol can be used advantageously in early PJI due to a more thorough debridement and removal of colonized implants needs to be evaluated. Purpose / Aim of Study: To evaluate effectiveness of cementless one-stage revision for early PJI in primary THA regarding the risk of re-infection and re- operation with exchange of implants. Materials and Methods: We identified 19 patients in our center with early (≤ 6 weeks postoperative) PJI after primary THA treated with one-stage cement- less revision in the period January 2012 - March 2018. Treatment followed the CORIHA-protocol. Primary outcome was retention of implants at most recent follow up. Secondary outcome was re-operation for other reasons than infec- tion. Patients were followed for a minimum of 2 years. Findings / Results: Mean follow up was 47,5 months (range: 24-97 months). 19 of 19 patients (100%) retained their implants, but two required superficial soft tissue debridement due to persistent wound seepage. One patient was re- operated due to a periprosthetic fracture, not related to the PJI treatment. The patient was treated with open reduction and internal fixation with no exchange of implants and no signs of persistent infection. Conclusions: Cementless one-stage revision appears to be an effective treat- ment of early PJI after primary THA, and at least an equal choice of treatment compared with DAIR. Whether the potential benefit of a lower re-revision rate for postoperative PJI, outweighs the increased surgical complexity of the CORIHA procedure needs further evaluation. 185.