Proximal femoral anti-rotation locking device

Abstract

The invention provides a proximal femoral anti-rotation locking device, which comprises a bone setting plate and a locking screw, wherein one end of the bone setting plate is a head part, the other end of the bone setting plate is a rod part, the head part is pasted with the greater trochanter, the rod part is pasted with the outer side of the thighbone, the head part is provided with five head threaded locking holes and two needle guide holes, the five head threaded locking holes respectively allow five locking screws extending into the greater trochanter, the femoral neck and the femoral calcar to be arranged on the head of the bone setting plate in a crossed way, the axial line direction of the five head threaded locking holes respectively forms an included angle with the plane and the vertical surface of the bone setting plate plane, through the axial line space, the inserted screws cannot mutually touch each other, and three lower locking screws in the five are crossed with the two upper locking screws. The proximal femoral anti-rotation locking device has the advantages that the locking screw looseness and the bone fracture setting loss can be effectively avoided, and the coxa vara malformation and the like are prevented; in addition, the application range is wide, and the proximal femoral anti-rotation locking device is applicable to instability, thrypsis, osteoporosis and intertrochanteric fracture in the old; finally, the proximal femoral anti-rotation locking device conforms to the proximal femoral anatomical structures, the pasting effect is good, the direction of the locking screws is relatively fixed, and the operation is convenient.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to an anti-rotation locking device for proximal femur. Background technique [0002] The mechanical conduction structure of the upper part of the femur is complex. The trabecular bone separated from the top of the femoral head in a fan shape and ending at the medial side of the femoral neck is the pressure trabecular bone, and the arc-shaped structure from the medial lower quarter of the femoral head to the distal side of the greater trochanter is the tension trabecular bone. The force axis does not coincide with the femoral axis. When intertrochanteric fractures occur, the normal mechanical structure of the proximal femur is out of balance, especially when there is a large cortical bone fracture on the medial side of the femoral neck, and the fracture fragments cannot bear the load. The load and compressive stress cannot be effectively transmitted through the femoral moment area, the...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an anti-rotation locking device for the proximal femur, aiming to solve the problems of difficult balance and fixation of the femur, easy coxa varus deformity after surgery, and difficult surgical exposure of the medial cortex during fracture reduction.

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