Fig. 2

Female, 72 years old, right femoral intertrochanteric fracture caused by road traffic injury (AO A2.1). Surgical treatment was performed 3 days after admission. A three-point positioning method was used to implant femoral neck screws. a Preoperative three-dimensional CT examination showed a right intertrochanteric fracture and a lesser trochanter fracture with displacement. b During the operation, the fluoroscope was tilted 15° to show the lateral image of the femoral neck. c Intraoperative anteroposterior fluoroscopy 3-point positioning to ensure that the guiding needle was in the middle of the femoral neck. d During the operation, using lateral fluoroscopy, the 3 points were located to ensure that the guiding needle was in the middle of the femoral neck. e Perspective positive position after placing the spiral blade. f Perspective on the posterior lateral position when inserting the spiral blade. g, h The X-rays were followed up 2 months after surgery