Knee Surg Relat Res 2016 Sep; 28(3): 239-244  https://doi.org/10.5792/ksrr.2016.28.3.239
Use of a New Knee Prosthesis as an Articulating Spacer in Two-Stage Revision of Infected Total Knee Arthroplasty
Rasmus Juul, MD1, Jesper Fabrin, MD1, Klaus Poulsen, MD1, and Henrik Morville Schroder, MD2
1Department of Orthopaedic Surgery, Zealand University Hospital, Koge; 2Department of Orthopaedic Surgery, Naestved Hospital, Naestved, Denmark
Correspondence to: Rasmus Juul, MD 
Department of Orthopaedic Surgery, Zealand University Hospital,
Lykkebækvej 1, Koge 4600, Denmark 
Tel: +45-4076-4590, Fax: +45-56-63-15-39 
Received: February 15, 2015; Revised: February 17, 2016; Accepted: March 4, 2016; Published online: September 1, 2016.
© Korean Knee Society. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Purpose: To report our experience with two-stage revision using a new femoral component (NFC) spacer (Depuy Synthes) as an articulating spacer. Materials and Methods: In this retrospective study, we reviewed 22 two-stage revisions that were performed using an NFC spacer in 22 patients suspected of having an infected total knee arthroplasty (TKA) from December 2010 to March 2013. The result was considered successful when eradication of infection was achieved using only one NFC spacer. Results: The average time from primary TKA to the first stage procedure was 29.1 months and the average time from the first stage procedure until the final second stage procedure was 12.7 weeks. The average range of motion increased from 82o preoperatively to 104o postoperatively. The American Knee Society Knee score increased from 29.3 points to 66 points. The Function score increased from 29.5 points to 64 points. Four cases were reinfected after two-stage revision. The mean follow-up was 37.6 months. Conclusions: The new articulating spacer showed promising short-term results both with regard to eradication of infection and functional improvement.
Keywords: Knee, Arthroplasty, Infection, Revision, Two-stage, Articulating spacer, New prosthesis
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