阅读说明：本技术 一种胸锁关节弹性内固定装置 (Elastic internal fixing device for sternoclavicular joint ) 是由 王本超 金林鑫 于 2019-10-14 设计创作，主要内容包括：本发明提供一种胸锁关节弹性内固定装置,包括第一第二胸锁关节弹性内固定装置内固定装置,第一胸锁关节弹性内固定装置包括胸骨段、弹性连接段、锁骨段,胸骨段包括第一胸骨段和第二胸骨段,第一胸骨段和第二胸骨段上均有爪齿和斜棱齿,两者的斜棱齿配合实现上下方向的锁定；第二爪齿通过第一肋骨下方、第二肋骨上方、胸骨柄外侧缘分别从左、右两侧插入后方抓住胸骨柄,与第一爪齿配合实现三个方向对胸骨的固定,使胸骨段在胸骨柄前方与胸骨柄实现紧密结合固定。弹性连接段具有弹性形变,可以在有效抵抗胸锁关节应力的同时保留胸锁关节的微动特征,使胸锁关节实现动态的弹性固定。锁骨段为弧形板状结构,其长度可根据需要延锁骨方向延长。(The invention provides a sternoclavicular joint elastic internal fixation device, which comprises a first and a second sternoclavicular joint elastic internal fixation device, wherein the first sternoclavicular joint elastic internal fixation device comprises a sternum section, an elastic connecting section and a clavicle section; the second claw teeth are inserted into the rear part from the left side and the right side through the lower part of the first rib, the upper part of the second rib and the outer side edge of the sternum stem to grasp the sternum stem, and are matched with the first claw teeth to realize the fixation of the sternum in three directions, so that the sternum segment is tightly combined and fixed with the sternum stem in front of the sternum stem. The elastic connecting section has elastic deformation, can effectively resist the stress of the sternoclavicular joint and simultaneously keep the micro-motion characteristic of the sternoclavicular joint, so that the dynamic elastic fixation of the sternoclavicular joint is realized. The clavicle section is of an arc-shaped plate structure, and the length of the clavicle section can be prolonged along the clavicle direction as required.)

1. The sternoclavicular joint elastic internal fixation device is characterized by comprising a first sternoclavicular joint elastic internal fixation device, wherein the first sternoclavicular joint elastic internal fixation device comprises a sternum section, an elastic connecting section and a clavicle section, the sternum section comprises a first sternum section and a second sternum section, the first sternum section comprises a first body part and a first claw tooth, the first claw tooth is connected to one end of the plate-shaped first body part and is bent inwards, the center of the first body part is provided with at least two longitudinally-arranged screw holes, and one surface of the first body part, opposite to the first claw tooth, is provided with a plurality of rows of first oblique edge teeth in a protruding manner; the second sternum section comprises a second body part and second claw teeth, the second body part is in a crescent-like plate shape, the two sides of the wider end of the second body part protrude inwards with one second claw tooth, the center of the second body part is provided with a longitudinal opening, one surface of the second body part, which is the same as the second claw teeth, protrudes with multiple rows of second oblique edge teeth, the narrower end of the second body part is connected with an elastic connecting section which is parallel to the second body part and bends outwards, the other end of the elastic connecting section is connected with a clavicle section, three clavicle screw holes are arranged in the middle axial direction of the clavicle section at least, and the direction of the clavicle screw holes is perpendicular to the plane of the clavicle.

2. The elastic internal fixation device for sternoclavicular joint as recited in claim 1, wherein said first beveled tooth is inclined toward the root of the first pawl tooth, and said second beveled tooth is inclined in an opposite direction to the first beveled tooth.

3. The elastic internal fixation device for sternoclavicular joint as recited in claim 1, wherein said longitudinal opening has a length sufficient to allow two screws to be screwed.

4. The elastic internal fixation device for sternoclavicular joint as claimed in claim 1, wherein the width of the elastic connecting section is gradually decreased and the rigidity is gradually decreased.

5. The elastic internal fixation device for sternoclavicular joint as recited in claim 1, wherein there are two first claws and there is a gap between the two first claws.

6. The internal elastic sternoclavicular joint fixation device of claim 1, further comprising a second internal elastic sternoclavicular joint fixation device, wherein the second internal elastic sternoclavicular joint fixation device has the same structure as the first internal elastic sternoclavicular joint fixation device, and the second internal elastic sternoclavicular joint fixation device has a bending direction of the elastic connecting section opposite to the bending direction of the elastic connecting section of the first internal elastic sternoclavicular joint fixation device, and the two are used for the left and right sternoclavicular joints, respectively.

Technical Field

The invention relates to an orthopedic internal fixation device, in particular to a sternoclavicular joint elastic internal fixation device.

Background

The sternoclavicular joint is a joint connecting the sternum and the clavicle, and as shown in fig. 12, is the only joint structure connecting the upper limb and the trunk, and plays a very important role in stabilizing the mechanical characteristics of the upper limb. The sternoclavicular joint is a micro joint, which has a small motion amplitude but a large stress. The sternum constituting the joint is a plate-like bone, which is thin in the front and rear of the bone, loose in bone, short in the passage of screws, etc., and thus, stable fixation is difficult to obtain. And the plane of the sternoclavicular joint is the entrance of the thorax, and important structures such as trachea, lung, carotid artery, superior vena cava and the like pass behind the plane of the sternoclavicular joint and are dangerous areas for surgical operation.

The existing surgical methods for treating the dislocation are various, but the internal fixing modes are various, but all the internal fixing modes have defects and defects, and the main reason is that a satisfactory internal fixing device special for the sternoclavicular joint is not provided at present, so that the clinical surgical treatment is carried out by adopting an alternative scheme, but the internal fixing device of the alternative scheme is not designed according to the anatomical characteristics of the sternoclavicular joint, the surgical difficulty is increased, and the surgical prognosis is not good.

A commonly used substitute internal fixation device is an internal fixation device with a clavicle hook, as shown in fig. 13, which is a special internal fixation device for surgical internal fixation such as dislocation of acromioclavicular joint, distal clavicle fracture and the like, but because the internal fixation device is not specially designed for sternoclavicular joint and does not consider the structural characteristics and biomechanical characteristics of the sternoclavicular joint, when the internal fixation device is used for internal fixation, the hook-shaped structure at the front end of the internal fixation device can be directly inserted into the joint gap of the sternoclavicular joint, so that the repair difficulty of ligament structures around the joint is increased while the structure in the gap is damaged, and internal fixation sliding or even slipping occurs after the internal fixation operation, so that the internal fixation fails.

The sternoclavicular hook, as shown in fig. 14, is an internal fixation device specially designed for the dislocation of sternoclavicular joint, which comprises a sternal hook and a clavicle steel plate, wherein during the internal fixation, the sternal hook needs to pass through a hole on the sternum handle from the back of the sternum under the assistance of a guide device, a guide steel wire and other devices and then is fixed on the front surface of the sternum handle by a nut. In addition, because only the tip of the sternum end is fixed with the sternum, the stability is insufficient, and the huge attraction of the sternoclavicular joint can cause the sternum hole to be enlarged and loosened, and even cause the sternum fracture.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides an elastic internal fixing device for a sternoclavicular joint, which can adapt to the anatomical characteristics of the sternoclavicular joint, reduce the operation difficulty, improve the operation prognosis effect and keep the micromotion characteristics of the sternoclavicular joint.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a sternoclavicular joint elastic internal fixation device comprises a first sternoclavicular joint elastic internal fixation device, wherein the first sternoclavicular joint elastic internal fixation device comprises a sternum section, an elastic connecting section and a clavicle section, the sternum section comprises a first sternum section and a second sternum section, the first sternum section comprises a first body part and first claw teeth, the first claw teeth are connected to one end of the plate-shaped first body part and are bent inwards, the center of the first body part is provided with at least two longitudinally-arranged screw holes, and one surface of the first body part, opposite to the first claw teeth, is provided with a plurality of rows of first oblique ridge teeth in a protruding manner; the second sternum section comprises a second body part and second claw teeth, the second body part is in a crescent-like plate shape, the two sides of the wider end of the second body part protrude inwards with one second claw tooth, the center of the second body part is provided with a longitudinal opening, one surface of the second body part, which is the same as the second claw teeth, protrudes with multiple rows of second oblique edge teeth, the narrower end of the second body part is connected with an elastic connecting section which is parallel to the second body part and bends outwards, the other end of the elastic connecting section is connected with a clavicle section, three clavicle screw holes are arranged in the middle axial direction of the clavicle section at least, and the direction of the clavicle screw holes is perpendicular to the plane of the clavicle.

In the elastic internal fixing device for the sternoclavicular joint, the first oblique ridge teeth incline towards the roots of the first claw teeth, and the second oblique ridge teeth incline towards the opposite direction to the first oblique ridge teeth.

According to the elastic internal fixing device for the sternoclavicular joint, the length of the longitudinal opening can be enough to screw two screws.

In the elastic internal fixing device for the sternoclavicular joint, the width of the elastic connecting section is gradually reduced, and the rigidity strength is gradually reduced.

The first claw teeth are two, and a gap is formed between the two first claw teeth. The narrower the first claw tooth, the better the strength can be satisfied.

The elastic internal fixing device for the sternoclavicular joint further comprises a second elastic internal fixing device for the sternoclavicular joint, the second elastic internal fixing device for the sternoclavicular joint has the same structure as the first elastic internal fixing device for the sternoclavicular joint, and the bending direction of the elastic connecting section of the second elastic internal fixing device for the sternoclavicular joint is opposite to that of the elastic connecting section 3 of the first elastic internal fixing device for the sternoclavicular joint and is respectively used for the left sternoclavicular joint and the right sternoclavicular joint.

The invention has the beneficial effects that: the first sternum section and the second sternum section are both provided with claw teeth and oblique ridge teeth, and the oblique ridge teeth of the first sternum section and the oblique ridge teeth of the second sternum section are matched to realize locking in the vertical direction; the second claw teeth are inserted into the rear part from the left side and the right side through the lower part of the first rib, the upper part of the second rib and the outer side edge of the sternum stem to grasp the sternum stem, and are matched with the first claw teeth to realize the fixation of the sternum in three directions, so that the sternum segment is tightly combined and fixed with the sternum stem in front of the sternum stem. The elastic connecting section obtains good elastic deformation by using an elastic material, and can effectively resist the stress of the sternoclavicular joint and simultaneously keep the micro-motion characteristic of the sternoclavicular joint, so that the dynamic elastic fixation of the sternoclavicular joint is realized. The clavicle section is an arc-shaped plate-shaped structure extending along the clavicle direction, and the length of the clavicle section can be extended along the clavicle direction as required.

Drawings

FIG. 1 is a schematic front view of a first sternoclavicular joint elastic internal fixation device of the present invention;

FIG. 2 is a schematic front view of a first sternum segment of the first sternoclavicular joint elastic internal fixation device of the present invention;

FIG. 3 is a schematic rear view of a first sternoclavicular joint elastic internal fixation device according to the present invention;

FIG. 4 is a schematic rear view of the first sternum section free elastic internal fixation device for sternoclavicular joints according to the present invention;

FIG. 5 is a schematic top view of a first sternoclavicular joint elastic internal fixation device of the present invention;

FIG. 6 is a schematic bottom view of the first sternoclavicular joint elastic internal fixation device of the present invention;

FIG. 7 is a schematic left side view of a first sternoclavicular joint elastic internal fixation device according to the present invention;

FIG. 8 is a schematic left side view of a first sternum segment of a first sternoclavicular joint elastic internal fixation device of the present invention;

FIG. 9 is a schematic right view of a first sternoclavicular joint elastic internal fixation device according to the present invention;

FIG. 10 is a front view of the first sternoclavicular joint elastic internal fixation device of the present invention in use;

FIG. 11 is a top view of the first sternoclavicular joint elastic internal fixation device of the present invention in use;

FIG. 12 is a schematic view of a sternoclavicular joint;

FIG. 13 is a schematic view of a prior art clavicular hook internal fixation device;

fig. 14 is a schematic view of a prior art internal sternoclavicular hook fixation device.

Fig. 1, first sternum segment, 101, first body portion, 102, first claw, 103, screw hole, 104, first angular tooth, 2, second sternum segment, 201, second body portion, 202, second claw, 203, longitudinal opening, 204, second angular tooth, 3, flexible connection segment, 4, clavicle segment, 401, clavicle screw hole, 5, screw.

Detailed Description