A kind of elastic internal fixation device of sternoclavicular joint

Abstract

The invention provides an elastic internal fixation device for sternoclavicular joints, which includes first and second elastic internal fixation devices for sternoclavicular joints. The first elastic internal fixation device for sternoclavicular joints includes a sternal section, an elastic connecting section, a clavicle section, and The segment includes the first sternal segment and the second sternal segment. Both the first sternal segment and the second sternal segment have claw teeth and oblique teeth. The oblique teeth of the two cooperate to realize the locking in the up and down direction; The lower side of the first rib, the upper side of the second rib, and the outer edge of the manubrium are respectively inserted from the left and right sides to grasp the manubrium sternum, and cooperate with the first claw teeth to realize the fixation of the sternum in three directions, so that the segment of the sternum is in front of the manubrium sternum. The manubrium achieves tight fit and fixation. The elastic connecting section has elastic deformation, which can effectively resist the stress of the sternoclavicular joint while retaining the fretting characteristics of the sternoclavicular joint, so that the sternoclavicular joint can achieve dynamic elastic fixation. The clavicular segment is an arc-shaped plate-shaped structure, and its length can be extended along the clavicular direction as required.

Description

technical field [0001] The invention relates to an orthopedic internal fixation device, in particular to an elastic internal fixation device for a sternoclavicular joint. Background technique [0002] The sternoclavicular joint is the joint that connects the sternum to the clavicle, such as Figure 12 As shown, it is the only joint structure connecting the upper limb and the trunk, which plays a very important role in stabilizing the mechanical characteristics of the upper limb. The sternoclavicular joint is a fretting joint with a small range of motion, but it is extremely stressed. The sternum, which constitutes the joint, is a plate-shaped bone. The bone is very thin in front and back, and the bone is relatively loose. The screws and the like run short in it, making it difficult to obtain stable fixation. Moreover, the plane of the sternoclavicular joint is the entrance of the thorax, behind which important structures such as the trachea, lung, carotid artery, and superi...

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Problems solved by technology

[0003] Traumatic dislocation of the sternoclavicular joint, fracture of the sternal end of the clavicle, fracture of the sternal end of the clavicle combined with dislocation of the sternoclavicular joint, and dislocation of the sternoclavicular joint caused by other causes are relatively common diseases in orthopedics. There are also various internal fixation methods, but each internal fixation method has its shortcomings and shortcomings. The main reason is that there is still a lack of a relatively satisfactory internal fixation device for the sternoclavicular joint, which leads to the use of alternative solutions in clinical practice. Surgical treatment is performed, but the internal fixation device of the alternative is not designed according to the anatomical characteristics of the sternoclavicular joint, resulting in increased difficulty of operation and poor prognosis

[0004] The commonly used alternative internal fixation device is the "clavicle hook" internal fixation device, such as Figure 13 As shown, this is an internal fixation device specially used for surgical internal fixation such as dislocation of the acromioclavicular joint and fracture of the distal clavicle. However, since it is not specially designed for the sternoclavicular joint, the structural characteristics and Biomechanical characteristics, when used as an internal fixation device for internal fixation, the hook-shaped structure at the front end will be directly inserted into the joint space of the sternoclavicular joint, resulting in structural damage in the space and increasing the difficulty of repairing the ligament structure around the joint. Internal fixation often slips or even slips, leading to internal fixation failure

[0005] Chest locks, such as Figure 14 As shown, it is an internal fixation device specially designed for dislocation of the sternoclavicular joint. It is composed of a sternal hook and a clavicle plate. During internal fixation, the sternal hook needs to pass through the sternum from the back of the sternum with the assistance of guides and guide wires. The hole on the manubrium is then fixed with a nut on the front surface of the manubrium sternum. Because the internal fixation needs to separate the back of the manubrium sternum for operation, it is easy to damage the important anatomical structures behind the manubrium sternum, such as the trachea, carotid artery, and superior vena cava. , because the rear of the sternum cannot be operated directly, it is difficult to guide it through the rear bone hole, and the operation is also more troublesome, so the operation is very difficult

In addition, because only the tip of the sternum is fixed to the sternum, the stability is insufficient, and the huge gravitational force of the sternoclavicular joint can cause the sternal hole to expand, loosen, and even cause sternal fractures

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