Auxiliary resetting internal fixing device for femoral neck fracture

Abstract

The invention provides an auxiliary resetting internal fixing device for femoral neck fracture. An internal fixing device body is at least provided with an arc fitting part matched with the inner sideof the femoral neck and used for auxiliary resetting and a fixing supporting part for fitting the far end of the fracture. The internal fixing device is characterized in that the internal fixing device body further comprises a tip arranged at the top of the arc fitting part and used for controlling the near end of the fracture to rotate. The auxiliary resetting internal fixing device for femoralneck fracture has the advantages of being simple in structure, easy and flexible to operate and the like. The problem is effectively solved that the shear force of the fracture part exists in the traditional surgery, the surgery time and recovery time are shortened, and the device has good social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an internal fixation device for difficult-to-reset femoral neck fractures, which can enhance the stability of fractures after fixation while assisting reduction. Background technique [0002] Femoral neck fractures are common clinical fractures. According to the angle between the fracture line and the horizontal line of the pelvis, femoral neck fractures are divided into adduction-type and abduction-type fractures. For adduction-type fractures, there is often a significant displacement of the fracture, and this type of fracture is very unstable due to local anatomical characteristics. [0003] The traditional treatment method is closed reduction and cannulated screw internal fixation, but adduction femoral neck fractures are very unstable, and closed reduction cannot control the proximal end of the fracture, so reduction is very difficult. This is because the proximal en...

AI Technical Summary

Problems solved by technology

[0003] The traditional treatment method is closed reduction and cannulated screw internal fixation, but the adduction femoral neck fracture is very unstable, and closed reduction cannot control the proximal end of the fracture, so the reduction is very difficult

This is because the proximal end of the fracture (that is, the part of the femoral head) lacks the attachment of muscles and ligaments, and is in a free state in the joint cavity. Large shear force and torsional force can easily cause displacement. In addition, because the proximal end of the fracture is in a free state, it is difficult to control the proximal end of the fracture during reduction, resulting in difficulty in reduction.

Even if the reduction is successful, due to the high shear force at the fracture end, it is easy to redisplace during or after fixation

[0004] In addition, the fracture line of adduction fractures is usually relatively vertical. Therefore, even after successful closed reduction and internal fixation with hollow nails, the shear force at the fracture site cannot be resolved, and the proportion of fracture redisplacement is very high. shortened union or femoral neck fracture nonunion

[0005] Therefore, it is necessary to design an auxiliary reduction fixation device to solve the problems of difficult reduction of femoral neck adduction fractures and large shear force of fracture ends.

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