title: A comparison of the clinical effect of two fixation methods on Hoffa fractures.
abstract: BACKGROUND
  Hoffa fractures are rare and difficult to treat for orthopaedic surgeons. The mechanism of injury of Hoffa fracture is still unknown and the operation approch and fixation method are still controversial. The aim of this study is to compare the clinical effect between two fixation methods on Hoffa fractures.
  
  
  METHODS
  From April 2004 to July 2013, we treated eleven patients (new method group) with Hoffa fracture using the new fixation method (fixed with intercondylar screw and crossed screws) and sixteen patients (traditional method group) using the traditional fixation method (fixed with anteroposteriorly placed screws). All documents from their admission until the last followup in December 2015 were reviewed, data regarding complications collected and results were evaluated using the Knee Society Score.
  
  
  RESULTS
  After an average follow-up period of 27.1 months (range 24-32 months), all fractures had healed. The average healing time of the new method group was 11.36 weeks (range 9-14 weeks) and the average healing time of the traditional method group was 11.88 weeks (range 9-14 weeks). According to the Knee Society Score, the average score of the new method group was 176.36 points (range 125-199 points), and the average score of the traditional method group was 171.19 points (range 148-197 points). Statistical analysis (t test, t = 0.76, P > 0.05) showed that the difference of both the healing time (t test, t = 0.94, P > 0.05) and the score between these two groups was not significant.
  
  
  CONCLUSIONS
  These results indicate that the new fixation method for Hoffa fracture is as effective as the traditional method and may provide a new way to treat Hoffa fractures.
authors: Department of Orthopaedics, The First People's Hospital of Huzhou (The First Affiliated Hospital of Huzhou Teachers College), Zhejiang University, Huzhou, 313000 Zhejiang China.
authors: Yi
authors: Y
authors: Xu
authors: Department of Orthopaedics, The First People's Hospital of Huzhou (The First Affiliated Hospital of Huzhou Teachers College), Zhejiang University, Huzhou, 313000 Zhejiang China.
authors: Heng
authors: H
authors: Li
authors: Department of Orthopaedics, The First People's Hospital of Huzhou (The First Affiliated Hospital of Huzhou Teachers College), Zhejiang University, Huzhou, 313000 Zhejiang China.
authors: Hong-Hang
authors: HH
authors: Yang
authors: Department of Orthopaedic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009 Zhejiang China.
authors: Zhi-Jun
authors: ZJ
authors: Pan
keywords: Femoral intercondylar notch; Hoffa fracture; Open reduction and internal fixation