Modified proximal femoral nail

Abstract

The invention relates to a modified proximal femoral nail. The modified proximal femoral nail is characterized in that an intramedullary nail comprises a main nail body, a first screw, a second screw,a third screw and a locking nail; the first screw is perpendicular to the proximal axis of the main nail body; the second screw and the distal axis of the main nail body form an angle of 140 to 150 degrees; the third screw and the distal axis of the main nail body form an angle of 140 to 145 degrees; the second screw is in the same plane as the axis of the main nail body 1 when viewed from the side; the axis of the first screw is 5 degrees ahead of the plane of the second screw and the main nail body; the axis of the third screw is 5 degrees behind the plane of the second screw and the main nail body. The modified proximal femoral nail has the advantages of enhancing support stability of the screws to a rear column, improving anti-rotation and varus stress of head and neck bones, being inline with the biomechanical requirements for proximal femoral internal fixation, preventing post-fracture complications, and improving treatment effectiveness.

Description

technical field [0001] The invention relates to the technical field of orthopedic medical devices, in particular to an improved proximal femoral intramedullary nail. Background technique [0002] The proximal femoral intramedullary nail is a commonly used internal fixation for the treatment of intertrochanteric fractures, and has achieved good results. At present, the commonly used internal fixation systems for the treatment of intertrochanteric fractures mainly include intramedullary nails and dynamic hip screw systems. The product is continuously updated, the concept of internal fixation is becoming more and more perfect, and the clinical effect is gradually becoming ideal. However, there are still many complications and many reports of failure. In order to further improve the treatment effect, after more than ten years of research and experience summarization, it was found that the failure of internal fixation was mainly due to the lack of stability in the later stage of ...

AI Technical Summary

Problems solved by technology

However, regarding a method that can enhance the support stability of the screw to the posterior column, and at the same time enhance the stress of the head and neck bone against rotation and varus, it is more in line with the biomechanical requirements of internal fixation of the proximal femur, and prevents post-fracture complications and improves the treatment effect. A modified proximal femoral intramedullary nail has no related reports

[0005] To sum up, there is an urgent need for a screw that can enhance the stability of the support of the posterior column, and at the same time enhance the stress of the head and neck bone against rotation and varus, which is more in line with the biomechanical requirements of the internal fixation of the proximal femur, and prevents post-fracture complications. Syndrome, a modified proximal femoral intramedullary nail to improve the treatment effect is currently not reported

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