title: Minimally invasive plate osteosynthesis for periprosthetic distal femoral fractures after total knee arthroplasty.
abstract: OBJECTIVE
  To evaluate the outcomes of the treatment of distal femoral fractures using minimally invasive plate osteosynthesis following total knee arthroplasty (TKA).
  
  
  METHODS
  From July 2008 to October 2011, 14 patients were treated with minimally invasive plate osteosynthesis for periprosthetic fractures following TKA. The mean duration of follow-up was 19.2 months and the mean age was 69.7 years. Lewis and Rorabeck classification was used to categorize the type of fracture. Pre- and postoperative range of motion, femorotibial angle, and Knee society score, time to bony union, and complications were evaluated.
  
  
  RESULTS
  The mean range of motion was 108.4 degrees preoperatively and 107.3 degrees postoperatively. No significant difference was observed in the pre- and postoperative mean range of motion. The average time to bony union was 3.9 months. The knee society score was 82.6 points preoperatively and 78.9 points postoperatively. The mean femorotibial angle was changed from 6.1 degrees valgus postoperatively to 4.6 degrees valgus postoperatively. There was no complication during the follow-up.
  
  
  CONCLUSIONS
  Minimally invasive plate fixation for distal femur fractures after TKA showed good results. Minimally invasive plate osteosynthesis is a recommendable treatment method for periprosthetic fractures.
authors.affiliation: Department of Orthopaedic Surgery, Yeungnam University Medical Center, Daegu, Korea.
authors.forename: Chul-Wung
authors.initials: CW
authors.lastname: Ha
authors.affiliation: Department of Orthopaedic Surgery, Yeungnam University Medical Center, Daegu, Korea.
authors.forename: Oog Jin
authors.initials: OJ
authors.lastname: Shon
authors.affiliation: Department of Orthopaedic Surgery, Yeungnam University Medical Center, Daegu, Korea.
authors.forename: Seung Wan
authors.initials: SW
authors.lastname: Lim
authors.affiliation: Department of Orthopaedic Surgery, Yeungnam University Medical Center, Daegu, Korea.
authors.forename: Kang Hyun
authors.initials: KH
authors.lastname: Park
keywords: Arthroplasty; Knee; Minimally invasive surgery; Periprosthetic femoral fracture