Elastic internal fixing device for acromioclavicular

Abstract

The invention discloses an acromioclavicular elastic internal fixing device which is mainly applied to the technical field of medical instruments and comprises a first fixator, a second fixator and a fixing wire rod, the first fixator is composed of a base plate A and implantation ends A, the two implantation ends A are arranged at the bottom of the base plate A, and the implantation ends A are provided with through holes and penetrate through the base plate A. The second fixator is composed of a base plate B and implantation ends B, two implantation ends B are arranged at the bottom of the substrate B, through holes are formed in the implantation ends B, and the implantation ends B penetrate through the substrate B. The fixing wire rod penetrates through the through holes of the implantation ends A and the implantation ends B in a crossed mode. The elastic internal fixing device for the acromioclavicular joint is convenient to use, the difficulty of an acromioclavicular joint dislocation operation is remarkably reduced, the operation quality is improved, the up-and-down and front-and-back elasticity of the acromioclavicular joint after operation is stable, the physiological structure of the acromioclavicular joint can be recovered, safety and reliability are achieved, rapid postoperative rehabilitation of a patient is facilitated, and pain of the patient is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a shoulder-clavicular elastic internal fixation device. Background Art

[0002] The acromioclavicular joint is a micro-motion joint, and its bony structure consists of three parts: the distal end of the clavicle, the medial surface of the acromion, and the coracoid process. The clavicle is curved in a "~" shape and is located in the front and upper part of the thorax. The medial 2 / 3 convexly faces forward and is triangular, while the lateral 1 / 3 convexly faces backward and is flat. The acromioclavicular joint is a micro-motion joint that connects the lateral end of the clavicle with the medial edge of the acromion. It is fixed by ligaments and joint capsules and is part of the shoulder joint complex. It is mainly involved in shoulder movement and force transmission. The anatomical structure and function of the acromioclavicular joint: 1. Bone composition: The acromioclavicular joint is composed of the distal end of the clavicle and the medial side of the acromion. The articular surface is covered with cartilage, allowing slight sliding and rotation; 2. Stable structure: The acromioclavicular ligament connects the clavicle and the acromion to prevent horizontal displacement. The coracoclavicular ligament (cone ligament, trapezoidal ligament): connects the clavicle and the coracoid process to prevent vertical dislocation; 3. Joint capsule: wraps the joint and provides basic support.

[0003] A healthy acromioclavicular joint can translate 6mm in the anterior, posterior and superior directions under load. The ligaments around the acromioclavicular joint include intra-articular ligaments and extra-articular ligaments. The intra-articular ligaments are the acromioclavicular ligaments, and the extra-articular ligaments include the coracoclavicular ligaments and the coracoacromial ligaments. The stability of the acromioclavicular joint mainly depends on the static stability structure and the dynamic stability structure. The static stability structure is mainly the coracoclavicular ligament (including the conoid ligament and the trapezius ligament), the joint capsule and the coracoacromial ligament, the acromioclavicular ligament, and the dynamic stability structure is mainly the tendon attachment of the deltoid and trapezius muscles.

[0004] Acromioclavicular joint dislocation is a common disease. The acromioclavicular joint is a joint formed by the acromion articular surface of the scapula and the acromion articular surface of the clavicle, which can make micro-motions in all directions. Treatment methods: conservative treatment and surgical treatment. The main surgical treatment methods at present are: 1. Clavicular hook plate, 2. Coracoclavicular loop plate, 3. Tension band wire. Disadvantages of these surgical methods: 1. Clavicular hook plate can only press down and reset the distal end of the clavicle. The hook is implanted under the acromion, which will cause subacromial pain in some patients and cannot control the separation and anterior and posterior displacement of the acromioclavicular joint; 2. Coracoclavicular loop plate is elastic fixation, but the fixation is eccentric indirect fixation and reduction, and the acromioclavicular joint still has forward and rotational displacement; 3. Tension band wire fixation is cumbersome and difficult to fix. The Kirschner wire needs to penetrate and destroy the acromioclavicular joint, and the wire is easy to protrude from the skin. All of the above internal fixations cannot restore the physiological anatomy of the joint, which is not conducive to the early rehabilitation of patients. Summary of the invention

[0005] The present invention provides an acromioclavicular elastic internal fixation device to solve the problems of poor effect and slow recovery of surgical treatment for acromioclavicular joint dislocation.

[0006] The technical solution of the present invention is as follows: a clavicle acromioclavicular elastic internal fixation device, including a first fixator, a second fixator, and a fixing wire. The first fixator consists of a substrate A and an implant end A. There are 2 implant ends A at the bottom of the substrate A. The implant end A has a through hole that penetrates the substrate A. The second fixator consists of a substrate B and an implant end B. There are 2 implant ends B at the bottom of the substrate B. The implant end B has a through hole that penetrates the substrate B. The fixing wire crosses through the through holes of the implant end A and the implant end B.

[0007] Preferably, the thickness of the substrate A and the substrate B is 4 mm - 6 mm.

[0008] Preferably, the angle between the axis of the through hole of the implant end A and the plane of the substrate A is 30° - 60°, and the angle between the axis of the through hole of the implant end B and the plane of the substrate B is 30° - 60°.

[0009] Preferably, the first fixator and the second fixator are made of titanium alloy or degradable magnesium alloy.

[0010] Preferably, the length of the substrate A and the substrate B is 16 mm, and the width is 6 mm.

[0011] Preferably, the inner diameter of the through holes of the implant end A and the implant end B is 3 mm.

[0012] Preferably, the distance between the bottom of the implant end A and the bottom of the substrate A is 4 mm, and the distance between the implant end B and the substrate B is 4 mm.

[0013] Preferably, the edges of the first fixator and the second fixator are rounded.

[0014] Preferably, the fixing wire is a ultra-high molecular weight polyethylene wire.

[0015] Preferably, the middle part of the substrate B is an arc transition section.

[0016] The principle of the invention is that the existing surgical treatment schemes for acromioclavicular joint dislocation cannot restore the physiological anatomy of the joint, and the patient recovers slowly. Based on the above reasons, an acromioclavicular elastic internal fixation device is proposed. The invention can intuitively reset the acromioclavicular joint during the operation. When in use, a first fixer and a second fixer are respectively implanted at the distal end of the clavicle and the acromion end, two fixing wires are respectively passed through the implantation end A of the first fixer and the implantation end B of the second fixer, and the distal end of the clavicle is pulled to reset to the acromion end with the acromion end as the base point in a mattress-like manner and knotted and fixed (to prevent the acromioclavicular joint from shifting up and down), and then the two ends of the fixing wire are crossed and respectively passed through the lower end of the implantation end A of the first fixer to the lower end of the implantation end B of the second fixer, and then knotted and fixed again (to prevent the acromioclavicular joint from shifting forward and backward), and then the acromioclavicular ligament attachment point is freshly treated and sutured, and the coracoclavicular ligament can heal under scar adhesion, so that the purpose of elastic fixation can be achieved and the purpose of protecting the soft tissue around the acromioclavicular joint can be achieved, the operation is less difficult, the time consumed is short, the operation quality is significantly improved, the patient's rapid recovery is facilitated, and the patient's pain is alleviated.

[0017] The beneficial effects of the present invention are as follows: an elastic acromioclavicular internal fixation device is easy to use, significantly reduces the difficulty of acromioclavicular joint dislocation surgery, improves the quality of surgery, stabilizes the upper and lower and front and back elasticity of the acromioclavicular joint after surgery, can restore the physiological structure of the acromioclavicular joint, is safe and reliable, helps patients recover quickly after surgery, and reduces patients' pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is the front view of the present invention; Figure 3 A top view of the present invention; Figure 4 A reference diagram of the state of use of the structure of the present invention; Figure 5 A reference diagram of the state of use of the structure of the present invention; In the figure, 100 is a first fixture, 101 is a substrate A, 102 is an implantation end A, 200 is a second fixture, 201 is a substrate B, 202 is an implantation end B, and 203 is an arc-shaped transition section. DETAILED DESCRIPTION

[0019] The specific implementation mode of the present invention is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4As shown in the figure, a clavicle-acromioclavicular elastic internal fixation device includes a first fixator 100, a second fixator 200, and a fixation wire. The first fixator 100 is composed of a substrate A101 and an implant end A102. There are 2 implant ends A102 at the bottom of the substrate A101. The implant end A102 has a through-hole that penetrates the substrate A101. The second fixator 200 is composed of a substrate B201 and an implant end B202. There are 2 implant ends B202 at the bottom of the substrate B201. The implant end B202 has a through-hole that penetrates the substrate B201. The fixation wire crosses through the through-holes of the implant end A102 and the implant end B202.

[0020] The usage process of the present invention: During use, a guide is used to respectively create implant channels at the distal end of the clavicle and the acromial end, then the bone chips are cleaned. Subsequently, the 2 implant ends A102 of the first fixator 100 are inserted into the channels at the distal end of the clavicle, and then the 2 implant ends B202 of the second fixator 200 are inserted into the channels at the acromial end. Then, the wire is threaded. Refer to Figure 5 , the fixation wire is inserted from top to bottom through one of the implant ends B202 of the second fixator 200, then passes out from one of the implant ends A102 of the first fixator 100 from bottom to top. Then, it is inserted from top to bottom through the other implant end B202 of the second fixator 200, and then passes out from the other implant end A102 of the first fixator 100 from bottom to top. Finally, after the fixation wire is tightened to an appropriate position, the 2 wire ends of the fixation wire are tied. In addition, according to the actual situation, the method shown in Figure 4 can also be used to thread and tie the fixation wire.

[0021] Specifically, the thickness of the substrate A101 and the substrate B201 is 4 mm - 6 mm. In this embodiment, using substrates A101 and B201 with a thickness of 4 mm - 6 mm can not only ensure sufficient mechanical strength but also reduce the damage to the patient's acromioclavicular joint, which helps the patient recover quickly.

[0022] Specifically, the angle between the axis of the through-hole of the implant end A102 and the plane of the substrate A101 is 30° - 60°, and the angle between the axis of the through-hole of the implant end B202 and the plane of the substrate B201 is 30° - 60°. In this embodiment, the surgeon can select the first fixator 100 and the second fixator 200 at appropriate angles according to the specific situation of the patient to select a more stable surgical plan for acromioclavicular joint dislocation.

[0023] Specifically, the first fixator 100 and the second fixator 200 are made of titanium alloy or degradable magnesium alloy. In this embodiment, the first fixator 100 and the second fixator 200 made of titanium alloy or degradable magnesium alloy can obtain a stable fixation solution, and degradable materials can also be used. After the patient recovers, the implant is gradually absorbed by the human body, and there is no need for a second operation to remove the implant.

[0024] Specifically, the substrate A101 and the substrate B201 have a length of 16 mm and a width of 6 mm. In this embodiment, the substrate A101 and the substrate B201 with the above dimensions can obtain better mechanical strength to fix the wire and improve the stability of the acromioclavicular joint.

[0025] Specifically, the inner diameter of the through hole of the implant end A102 and the implant end B202 is 3 mm. In this embodiment, with the through hole of the above dimensions, the fixing wire can pass through quickly, causing less damage to the patient's acromioclavicular joint and helping the patient recover quickly.

[0026] Specifically, the distance between the bottom of the implant end A102 and the bottom of the substrate A101 is 4 mm, and the distance between the implant end B202 and the substrate B201 is 4 mm. In this embodiment, the first fixator 100 and the second fixator 200 with the above dimensions provide a stable fixation solution for the acromioclavicular joint and cause less damage to the patient's acromioclavicular joint.

[0027] Specifically, as Figure 1 , Figure 2 , Figure 3 shown, the edges of the first fixator 100 and the second fixator 200 are rounded. In this embodiment, the rounded first fixator 100 and second fixator 200 can avoid cutting off the fixing wire.

[0028] Specifically, the fixing wire is a ultra-high molecular weight polyethylene wire. In this embodiment, using ultra-high molecular weight polyethylene wire as the fixing wire has ultra-high tensile strength and realizes reliable fixation for acromioclavicular joint dislocation surgery.

[0029] Specifically, as Figure 1 , Figure 3 shown, the middle part of the substrate B201 is an arc transition section 203.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An acromioclavicular elastic internal fixation device, characterized in that: It includes a first fixator (100), a second fixator (200), and a fixing wire. The first fixator (100) is composed of a substrate A (101) and an implanting end A (102). There are 2 implanting ends A (102) at the bottom of the substrate A (101). The implanting end A (102) has a through hole that penetrates the substrate A (101). The second fixator (200) is composed of a substrate B (201) and an implanting end B (202). There are 2 implanting ends B (202) at the bottom of the substrate B (201). The implanting end B (202) has a through hole that penetrates the substrate B (201). The fixing wire crosses through the through holes of the implanting end A (102) and the implanting end B (202).

2. The acromioclavicular elastic internal fixation device according to claim 1, characterized in that: The thickness of the substrate A (101) and the substrate B (201) is 4 mm - 6 mm.

3. The acromioclavicular elastic internal fixation device according to claim 1, wherein: The angle between the axis of the through hole of the implanting end A (102) and the plane of the substrate A (101) is 30° - 60°. The angle between the axis of the through hole of the implanting end B (202) and the plane of the substrate B (201) is 30° - 60°.

4. The acromioclavicular elastic internal fixation device according to claim 1, characterized in that: The first fixator (100) and the second fixator (200) are made of titanium alloy or degradable magnesium alloy.

5. The acromioclavicular elastic internal fixation device according to claim 1, characterized in that: The length of the substrate A (101) and the substrate B (201) is 16 mm, and the width is 6 mm.

6. The acromioclavicular elastic internal fixation device according to claim 1, characterized in that: The inner diameter of the through holes of the implanting end A (102) and the implanting end B (202) is 3 mm.

7. The acromioclavicular elastic internal fixation device according to claim 1, characterized in that: The distance between the bottom of the implanting end A (102) and the bottom of the substrate A (101) is 4 mm. The distance between the implanting end B (202) and the substrate B (201) is 4 mm.

8. The acromioclavicular elastic internal fixation device according to claim 1, characterized in that: The edges of the first fixator (100) and the second fixator (200) are chamfered.

9. The acromioclavicular elastic internal fixation device according to claim 1, characterized in that: The fixing wire is a ultra-high molecular weight polyethylene wire.

10. The acromioclavicular elastic internal fixation device according to claim 1, characterized in that: The middle part of the substrate B (201) is an arc transition section (203).

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