title: Arthrodesis After Infected Revision TKA: Retrospective Comparison of Intramedullary Nailing and External Fixation.
abstract: BACKGROUND
  Infection after revision total knee arthroplasty (TKA) for previous septic TKA can be a challenging problem to treat due to loss of bone stock and soft tissue integrity. In these cases, arthrodesis is a well-recognized salvage procedure.
  
  
  OBJECTIVE
  The aim of this retrospective study was to compare the results as described by a Visual Analogue Scale (VAS) and the Lequesne Algofunctional Score (LAS) of knee arthrodeses performed by using either an external fixator (EF) or an intramedullary nail (IM).
  
  
  METHODS
  The study included 34 knee arthrodesis divided in two groups: first group included 12 patients treated with EF and the second group of 22 patients dealt with IM nail. Clinical and functional evaluation was performed using the VAS and the LAS. Full-length radiographs were used to verify limb length discrepancy.
  
  
  RESULTS
  VAS and LAS results showed a substantial improvement relative to preoperative condition in both groups. However, the LAS was significantly better in the IM nail group. The mean leg length discrepancy was significantly greater (4.5 cm) in the first group than in the second one (0.8 cm). No recurrence of infection was observed in the EF group while there were three recurrent infections in the IM nail group.
  
  
  CONCLUSIONS
  Our study supported the existing literature and found that reinfection after revision TKA can be effectively treated with arthrodesis. In presence of massive bone loss, we recommend arthrodesis with IM nail used as an endoprosthesis, without bone-on-bone fusion, to produce a stable and painless knee, while preserving the limb length. Use of an IM nail allowed us to get a better functional result than EF.
authors.affiliation: Biomechanics Laboratory, Rizzoli Orthopaedic Institute, Via di Barbiano n.1/10, Bologna, 40126 Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Iacono
authors.forename: Iacono
authors.initials: I
authors.lastname: Francesco
authors.affiliation: Biomechanics Laboratory, Rizzoli Orthopaedic Institute, Via di Barbiano n.1/10, Bologna, 40126 Italy.
authors.forename: Giovanni Francesco
authors.initials: GF
authors.lastname: Raspugli
authors.forename: Raspugli Giovanni
authors.initials: RG
authors.lastname: Francesco
authors.affiliation: Biomechanics Laboratory, Rizzoli Orthopaedic Institute, Via di Barbiano n.1/10, Bologna, 40126 Italy.
authors.forename: Danilo
authors.initials: D
authors.lastname: Bruni
authors.forename: Bruni
authors.initials: B
authors.lastname: Danilo
authors.affiliation: Biomechanics Laboratory, Rizzoli Orthopaedic Institute, Via di Barbiano n.1/10, Bologna, 40126 Italy.
authors.forename: Mirco
authors.initials: M
authors.lastname: Lo Presti
authors.forename: Lo Presti
authors.initials: LP
authors.lastname: Mirco
authors.affiliation: Biomechanics Laboratory, Rizzoli Orthopaedic Institute, Via di Barbiano n.1/10, Bologna, 40126 Italy.
authors.forename: Bharat
authors.initials: B
authors.lastname: Sharma
authors.forename: Sharma
authors.initials: S
authors.lastname: Bharat
authors.affiliation: Biomechanics Laboratory, Rizzoli Orthopaedic Institute, Via di Barbiano n.1/10, Bologna, 40126 Italy.
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Akkawi
authors.forename: Akkawi
authors.initials: A
authors.lastname: Ibrahim
authors.affiliation: Biomechanics Laboratory, Rizzoli Orthopaedic Institute, Via di Barbiano n.1/10, Bologna, 40126 Italy.
authors.forename: Maurilio
authors.initials: M
authors.lastname: Marcacci
authors.forename: Marcacci
authors.initials: M
authors.lastname: Maurilio
keywords: EF; IM nail; arthrodesis; infection; limb salvage; revision surgery; total knee arthroplasty