Nested structure for reduction of femoral neck fractures

Abstract

The invention discloses a nested structure for reduction of femoral neck fractures. The nested structure comprises a sleeve and a first screw; the diameter of the first screw is matched with that of the sleeve; the tail of the first screw is arranged in the sleeve; the head of the first screw is of a threaded structure; the sleeve is composed of a sleeve head, a sleeve middle and a sleeve bottom;the sleeve middle is in double-headed thread arrangement; the sleeve bottom is of a hollow prism structure with a hexagonal outer edge and a circular inner edge. The nested structure is simple and flexible in structure; the problem of poor anti-rotation capability of a traditional DHS can be effectively solved; the production and use cost is low, and the large-scale application and popularizationare facilitated.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to an invaginating structure for femoral neck fracture reduction. Background technique [0002] Femoral neck fracture refers to the fracture between the femoral head and the base of the femoral neck. Femoral neck fractures often occur in the elderly. As people live longer, especially with the aging population structure, the incidence of femoral neck fractures is increasing day by day. [0003] There are two main problems in the clinical treatment of femoral neck fractures: nonunion and avascular necrosis of the femoral head. There are many surgical methods for the treatment of femoral neck fractures clinically, and reduction and internal fixation are commonly used. If the patient is younger, hip replacement surgery is not required, and the femoral head is preserved, and reduction and internal fixation are often used. [0004] There are two methods of reductio...

AI Technical Summary

Problems solved by technology

However, because the lateral plate is located on the lateral side of the femur, the defect of the medial cortex may cause accidents such as screw cutting of the femoral head, displacement of the internal fixation, or prolapse of the screws on the side of the plate.

Therefore, the failure rate of the traditional DHS fixation system is as high as 24% to 56%, and the operation time is longer and the bleeding volume is more

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