Combined fixing device for patella distal extra-articular fracture

Abstract

The invention discloses a combined fixing device for patella distal extra-articular fracture. The combined fixing device comprises an arc-shaped steel plate, a steel wire and a pair of kirschner wires, wherein the arc-shaped steel plate is hooped at the lower polar position of a patella, the kirschner wires downwards penetrate through an upper bone block and a lower bone block, the upper ends of the two kirschner wires are reserved above the patella, and the steel wire is wound to be 8-shaped, the upper semicircle of the 8-shaped steel wire is arranged at the upper ends of the kirschner wires in a sleeving manner, the bottom arc edge of the lower semicircle of the steel wire is connected to the arc-shaped steel plate, the steel wire is connected with the kirschner wires and the arc-shaped steel plate, and the bone block of the lower patella is tightly attached to the bone block of the upper patella through tension and stress of the steel wire. The combined fixing device can promote fracture healing, can meet the requirement of early functional exercise, and does not need to be braked after operation, so that prognosis of a patient is improved, and the life quality is improved.

Description

technical field [0001] The invention relates to the field of medical fracture fixation devices, in particular to a combined fixation device for extra-articular fractures of the distal patella. Background technique [0002] The patella is the largest sesamoid bone in the human body. The bony continuation covered by the non-articular cartilage surface of the lower 1 / 4 of the long axis of the patella is called the lower pole of the bone, and its length is about 1.5 cm. The inferior pole of the patella is the extra-articular bony continuation of the distal patella and is the point of attachment of the quadriceps muscle to the knee joint. In kinematic anatomy, the inferior pole of the patella is connected to the patellar ligament, which transmits the muscle force of the quadriceps to the tibial tuberosity, thereby completing the function of knee extension. Extra-articular fractures of the distal patella, that is, avulsion fractures of the lower pole of the patella, are AO34A fra...

AI Technical Summary

Problems solved by technology

However, these fixation methods are likely to cause changes in the height of the patella, require a long period of postoperative immobilization and significant internal fixation irritation, and have defects.

At present, there is still controversy about the best treatment plan for the fracture of the lower pole of the patella. There is no fixation method that does not require special customized equipment and can satisfy strong fixation and early functional exercise.

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