Fig. 3From: Decreased complications but a distinctive fixation loosening mechanism of fully threaded headless cannulated screw fixation for femoral neck fractures in young adultsFTHCS fixation for FNF in a 43-year-old male complicated by medial screw migration. a AP radiograph of the pelvis including both hip joints revealed a Garden type IV, Pauwels type II left femoral neck fracture with VN angle < 15°. b Immediate postoperative radiographs showed acceptable reduction and three FTHCS. AP and lateral radiographs 3 months postoperatively (c, d) demonstrated migration of the distal screw beneath the femoral head subchondral bone in the direction of the acetabulum with slight fracture displacement. Radiographs 4 months postoperatively (e, f) exhibited further displacement of the distal screw tip, penetrating the subchondral bone. Six-month postoperative radiographs (g, h) revealed fracture union with no further shift of the displaced screw and the patient was without functional limitationsBack to article page