title: Use of the KineSpring system in the treatment of medial knee osteoarthritis: preliminary results.
abstract: OBJECTIVE
  the purpose of this study was to analyze our preliminary results obtained with the KineSpring system in patients suffering from medial compartment knee osteoarthritis (OA).
  
  
  METHODS
  between September 2012 and May 2014, 53 patients underwent treatment with the KineSpring system. Patient self-assessment was performed pre-operatively and at 3, 6 and 12 months postoperatively, and included the KOOS, Tegner activity score, Lysholm functional knee score, VAS knee pain score, and IKDC score. Device- and procedure-related adverse events were recorded.
  
  
  RESULTS
  mean KOOS subscales, except for the Sport/Recreation subscale at six months, improved over time. Mean WOMAC Pain and Function domains, Lysholm score, IKDC score and VAS knee pain score improved over the follow-up period and were significantly improved at 3, 6 and 12 months postoperatively compared to baseline. Mean Tegner score improved slightly over time. In 5 of the 53 (9.4%) patients re-operation was necessary. In 3 patients the device was removed due to infection (one case) or persistent knee pain (two cases). Surgical arthrolysis was performed in two patients.
  
  
  CONCLUSIONS
  in our preliminary experience, the KineSpring system gave good short-term clinical results.
  
  
  METHODS
  Level IV, therapeutic case series.
authors.affiliation: Department of Orthopaedics, Sacro Cuore Don Calabria Hospital, Negrar (VR), Italy.
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Madonna
authors.affiliation: Department of Orthopaedics, Sacro Cuore Don Calabria Hospital, Negrar (VR), Italy.
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Condello
authors.affiliation: Department of Orthopaedics, University of Trieste, Italy.
authors.forename: Gianluca
authors.initials: G
authors.lastname: Piovan
authors.affiliation: Department of Orthopaedics, University of Perugia, Italy.
authors.forename: Daniele
authors.initials: D
authors.lastname: Screpis
authors.affiliation: Department of Orthopaedics, Sacro Cuore Don Calabria Hospital, Negrar (VR), Italy.
authors.forename: Claudio
authors.initials: C
authors.lastname: Zorzi
keywords: KineSpring; knee osteoarthritis; medial compartment; unloading; varus