Fixation of intracapsular femoral neck fractures with a one-hole plate dynamic hip screw.

The results of internal fixation of 55 subcapital fractures of the femoral neck with a one-hole plate dynamic hip screw are presented. Two fractures could not be satisfactorily fixed and the procedures were converted to hemi-arthroplasties, but the remainder united within 6 months. The rate of avascular necrosis after union was 3 per cent in undisplaced and 31 per cent in displaced fractures. This method of fixation appears to produce a lower non-union rate than multiple pins in suitable fractures without affecting the incidence of late avascular necrosis.