Twenty-four patients (24 knees) who underwent open reduction at our department during the past five years (14 males and 10 females; mean age 58.8 years) were enrolled in this study. The fracture types were determind according to Hohl's classification. The therapeutic results were assessed using the therapeutic result judgment criteria of Hohl and Luck and JOA score. Accordingly, the factors determine the therapeutic outcome were invenstigated.
The therapeutic results of fracture types 2, 3, 4 and 5 were good or excellent by functional assessment with JOA score of over 90 for all patients. However, the therapeutic results of fracture type 6 (2 patients) were fair by functional assessment with JOA score of 75, indicating the a poor outcome of the reduction. This deterioration of the therapeutic results was attributed to the poor alignment of the lower limb owing to the complexity of type 6 fracture.