However, whether it can accelerate fracture healing and reduce femoral head necrosis is still controversial. At present, a medial femoral neck support plate combined with hollow screw internal fixation is an emerging treatment of Pauwels type III femoral neck fracture in clinical practice . Hollow nails and medial support plates are an emerging treatment method that can be used to treat Pauwels type III femoral neck fractures . Some studies suggest that this type of fracture is treated by using a nail plate system. Moreover, postoperative complications such as nail withdrawal, nonunion, fracture displacement, and osteonecrosis are very likely to occur . Clinically, internal fixation with hollow nails is often employed, whereas the treatment effect is poor due to large shear stress. There are still many differences in the choice of internal fixation for Pauwels type III fractures. According to the coronary fracture line and the angle of the upper edge of the acetabulum 50 ∘, it can be divided into Pauwels type I, Pauwels type II and Pauwels type III. When the cutting fracture line is 50 ∘, it is classified as type II fracture, which is suitable for treatment with hollow nail internal fixation . The focus of the Pauwels classification of femoral neck fractures is on mechanical angles . In this method, three hollow nails are distributed in an F shape on the femoral neck and the coronal plane of the proximal femur. To improve the effect of internal fixation of femoral neck fracture cannulated nails, Filipov reported an F-shaped spatial layout method for internal fixation of femoral neck fracture cannulated nails . Good reduction and fixation is an important principle for the treatment of femoral neck fractures, and also a basic guarantee to promote patient rehabilitation and joint function recovery . In recent years, with the intensification of the population aging process, its incidence rate has been increasing year by year, accounting for about 3.58% of systemic fractures and 54% of hip fractures . Femoral neck fractures often occur in the elderly, which usually results in hip pain .
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