Reverse V-shaped hollow screw assembly for fixing femoral neck fracture

Abstract

The invention provides a reverse V-shaped hollow screw assembly for fixing femoral neck fracture. The reverse V-shaped hollow screw assembly for fixing femoral neck fracture is characterized by comprising a first parallel screw, a second parallel screw and an oblique screw which form a reverse V-shaped assembly at the proximal end of the femur; the first parallel screw and the second parallel screw are parallel to each other and are parallel to the bone cortex above the femoral neck, so that the upper tension resistance effect is achieved; the oblique screw is located under the first parallel screw and the second parallel screw and is arranged in the direction of the connecting line of the femoral head load bearing area and the femoral distance; and the lower anti-pressure effect is achieved. Through a reverse V-shaped method, the two screws parallel to the bone cortex above the femoral neck above the femoral neck achieve the anti-tension effect, and the long oblique screw at the lower side achieves the anti-pressure effect. According to the method, the tension-pressure load condition of a real human body is effectively simulated by placing the screws, the dynamic balance of tension and pressure is achieved, and healing of femoral neck fracture is facilitated.

Description

technical field [0001] The invention relates to the field of clinical medicine, in particular to trauma orthopedics, and more specifically to a reverse V-shaped hollow screw assembly for fixing femoral neck fractures. Background technique [0002] Internal fixation for femoral neck fractures usually uses three hollow lag screws. The classic method is that three screws are inserted into the femoral neck in an inverted triangle shape. The length of the screws is 75mm-110mm. . Since there is no thread on the screw part of the cannulated lag screw, the screw back phenomenon will occur during the healing process of the femoral neck in the later stage, and the holding force will decrease; the fixation method of three parallel screws cannot achieve stable support for the femoral neck. [0003] On this basis, we put forward the theory of dynamic compression and support of the proximal femur. The upper two screws act as compression and anti-tension effects, and the lower, longer scr...

AI Technical Summary

Problems solved by technology

Since there is no thread on the screw part of the hollow lag screw, the screw back phenomenon will occur during the healing process of the femoral neck in the later stage, and the holding force will decrease; the fixation method of three parallel screws cannot achieve stable support for the femoral neck

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