Fig. 1Photograph shows a measurement of neck diameter and a diameter that was made by two pin. A indicate femoral neck diameter. B indicates sum of diameter of two screws and their interspace.
Fig. 2A 69 year old female who underwent internal fixation with a proximal femoral nail for intertrochanteric fracture. Radiograph shows no more space to insert an antirotational pin after fixation of lag screw.
Fig. 3This diagram shows the distribution of femoral neck diameter of neck diameter of 44 patients.
Fig. 4
(A) A 72 year old man had a nonunion with metal failure 7 months after internal fixation with proximal femoral nail for intertrochanteric fracture. (B) The nail breakage occurred through the hole for lag screw.