Fig. 1

A, B, C are 53-year-old men, A preoperative hip orthogonal position shows right femoral neck fracture (Garden type IV), B postoperative hip orthogonal position FNS sliding space is not limited (20 mm); C 6 months postoperative femoral neck is severely shortened, FNS still has about 5 mm sliding space. D, E, F are 58-year-old women, D preoperative hip orthogonal position shows right femoral neck fracture (Garden type IV), E postoperative hip orthogonal position FNS sliding space restricts sliding space (about 5 mm), F 6 months postoperative femoral neck mild shortening (shortening < 5 mm). G, H, and I were 54-year-old men; G's preoperative CT 3D reconstruction of the hip showed posterior medial cortical comminution; H's postoperative hip was in an orthogonal position near anatomic reset; I's right hip was in an orthogonal position 6 months postoperatively with severe shortening of the femoral neck (< 10 mm of shortening)