A coracoclavicular artificial ligament fixation system for shoulder joint

Abstract

The application discloses a coracoclavicular artificial ligament fixing system, and belongs to the technical field of medical auxiliary instruments, which comprises an artificial ligament and a traction rope; the artificial ligament is arranged to establish an '8' winding self-locking structure between a clavicle and a coracoid process, so as to reconstruct a coracoclavicular ligament and repair and strengthen a acromioclavicular ligament; the traction rope is connected with the artificial ligament and is used for guiding the artificial ligament to be positioned, tightened and fixed. The application reduces bone damage: no need to drill holes in the coracoid process and the clavicle, the coracoclavicular ligament and the acromioclavicular ligament can be fixed, only a rivet is arranged at the acromion, the bone damage is reduced by more than 80% than that in a traditional operation, and the complication rate is reduced by 20%; double self-locking improves the fixing effect: the coracoclavicular ligament and the acromioclavicular ligament are reconstructed through the annular sleeve lock, the coracoid process end is fixed through the cross self-locking winding under the coracoid process, and the acromioclavicular joint stability is improved by more than 40% through the annular fixing connection with the acromion.

Description

Technical Field

[0001] This invention belongs to the field of medical assistive device technology, and in particular relates to a shoulder joint coracoclavicular artificial ligament fixation system. Background Technology

[0002] Acromioclavicular joint dislocation is a common shoulder injury. Traditional treatment methods often employ metal fixation devices such as looped titanium plates or clavicle hook plates. These are created by drilling holes in the clavicle and coracoid process, inserting the metal plate, and then using sutures to form a ring fixation. However, existing techniques have the following drawbacks: 1. Significant bone damage: Drilling holes in narrow bone segments such as the coracoid process is necessary. The drill bit is prone to slipping during drilling and can easily cause cortical bone fracture. Sutures or artificial ligaments need to pass through the clavicle and coracoid process, thus forming a large bone tunnel and causing a large loss of bone.

[0003] 2. Metal complications: The elastic modulus of rigid materials such as titanium plates differs significantly from that of bone surfaces, which can easily cause windshield wiper effect and bungee jumping effect, leading to bone wear, bone resorption, or even compression fractures. Repeated friction between metal materials and soft tissues may cause suture breakage, resulting in a high risk of fixation failure. Furthermore, large metal implants can interfere with imaging examinations such as X-rays and MRI, affecting postoperative observation.

[0004] 3. Limitations of fixation effect: Most existing fixation structures are unidirectional fixation, which makes it difficult to simultaneously achieve coracoclavicular ligament reconstruction and acromioclavicular ligament reinforcement, resulting in insufficient joint stability after surgery.

[0005] 4. Soft tissue irritation: The three-dimensional suture bundles used in metal structures or full suture fixation can easily irritate the surrounding soft tissues, triggering an inflammatory response and hindering postoperative recovery.

[0006] 5. Requires a second surgery for removal: Internal fixation devices such as clavicle hook plates usually require a second surgery for removal. The surgery is more invasive and has a significant impact on the recovery of shoulder joint function. Some patients may have long-term limited shoulder joint movement.

[0007] In summary, current treatments for acromioclavicular joint dislocations still suffer from problems such as significant bone damage, numerous complications, poor fixation, interference with imaging observation, and the need for secondary surgery. Therefore, developing a novel acromioclavicular joint dislocation repair system that can overcome these shortcomings has significant clinical importance and application value. Summary of the Invention

[0008] This invention provides a shoulder joint coracoclavicular artificial ligament fixation system to solve the problems in the prior art.

[0009] The present invention adopts the following technical solution: a shoulder joint coracoclavicular artificial ligament fixation system, including an artificial ligament and a traction rope; the artificial ligament is configured to establish an "8"-shaped self-locking structure between the clavicle and the coracoid process for the reconstruction of the coracoclavicular ligament and the repair and reinforcement of the acromioclavicular ligament; the traction rope is connected to the artificial ligament and is used to guide the positioning, tightening and fixation of the artificial ligament.

[0010] Furthermore, the artificial ligament includes a fixing rope and an annular locking end. One end of the fixing rope is connected to the annular locking end, and a cross fixing hole is provided in the middle of the fixing rope. The distance between the annular locking end and the cross fixing hole is 40-60mm, and the overall length of the fixing rope is 310-410mm.

[0011] Furthermore, the length of the annular locking end is 8-10mm; the length of the cross fixing hole is 8-10mm.

[0012] Furthermore, the fixing rope has a flat structure and a width of 5-10mm.

[0013] Furthermore, the traction rope includes a first traction rope and a second traction rope; one end of the first traction rope is connected to the end of the annular lock, and the other end extends outward for guiding the tightening and temporary fixation of the fixing rope; one end of the second traction rope is connected to the end of the annular lock, and the middle part of the second traction rope is fixed on the fixing rope to form two second traction rope fixing parts, and the other end extends outward for knotting and wrapping with the first traction rope to fix the figure-eight self-locking structure.

[0014] Furthermore, the first traction rope has a diameter of 1-3mm and a length of 50-100mm.

[0015] Furthermore, the second traction rope has a diameter of 1-3mm and a length of 310-410mm.

[0016] Furthermore, a rivet is provided at the end of the fixing rope.

[0017] Furthermore, the fixing rope is configured to wrap around the clavicle at least once, and the end of the fixing rope is pulled tight after passing through the end of the annular loop to form a loop that fits tightly against the clavicle at the coracoclavicular ligament insertion point. The end of the fixing rope can also wrap around the coracoid process from below to above it, and pass through the cross fixing hole to form a self-locking cross fixation. Finally, the end of the fixing rope wraps around the clavicle from above at least once and is fixed to the acromion by rivets, forming an "8" figure-eight self-locking structure.

[0018] Furthermore, the main body of the artificial ligament is made of ultra-high molecular weight polyethylene braided thread, and the traction rope is made of non-absorbable surgical suture.

[0019] Furthermore, the end of the fixing rope is fixed to the shoulder acromion by a rivet.

[0020] The above-described at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects: 1. Reduced bone damage: No need to drill through holes in the coracoid process and clavicle; rivets are inserted only at the acromion, reducing bone damage by more than 60% compared to traditional surgery.

[0021] 2. Double self-locking fixation effect: The first self-locking knot is formed at the clavicular end of the coracoclavicular ligament to fix the clavicular end, and the second self-locking knot is wrapped and crossed below the coracoid process to fix the coracoid process end. The coracoclavicular ligament is reconstructed. At the same time, through the circumferential fixation connection with the acromion, the acromioclavicular ligament is strengthened to achieve the figure-eight wrapping self-locking structure, which improves the stability of the acromioclavicular joint by 40% and is more suitable for type III and above acromioclavicular joint dislocations.

[0022] 3. Good biocompatibility: The fixation rope full suture structure is made of ultra-high molecular weight polyethylene, which is free from metal implant irritation, reduces the incidence of postoperative inflammation by 70%, and does not affect imaging examinations.

[0023] 4. Ease of operation: The traction rope guides the fixing rope through the loop, eliminating the need for complicated knotting during the operation. The operation time is reduced by 20% compared to traditional methods, and the self-locking structure avoids the risk of loosening after the operation. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the shoulder joint coracoclavicular artificial ligament fixation system of the present invention; Figure 2 This is a schematic diagram of the first self-locking knot of the clavicle and the annular locking end in this invention; Figure 3 This is a schematic diagram of the second self-locking knot at the beak end in this invention; Figure 4 This is a schematic diagram of the figure-eight self-locking structure for strengthening and fixing the acromioclavicular ligament in this invention; Figure label: First traction rope 1, second traction rope 2, fixing rope 3, clavicle 4, coracoid process 5, ring-shaped locking end 6, cross fixing hole 7, acromion 8, second traction rope fixing part 9. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0026] The following detailed description, in conjunction with the accompanying drawings, illustrates the technical solution of a shoulder joint coracoclavicular artificial ligament fixation system according to various embodiments of the present invention.

[0027] Reference Figures 1 to 4 As shown, this embodiment of the invention provides a coracoclavicular artificial ligament fixation system for the shoulder joint, including an artificial ligament and a traction rope; the artificial ligament is used to establish an "8"-shaped self-locking structure between the clavicle 4 and the coracoid process 5 to realize the reconstruction of the coracoclavicular ligament and the repair and strengthening of the acromioclavicular ligament; the traction rope is connected to the artificial ligament and is used to guide the positioning, tightening and fixation of the artificial ligament.

[0028] Specifically, the artificial ligament includes a fixing rope 3, which is made of ultra-high molecular weight polyethylene and has a flat structure. One end of the fixing rope 3 is provided with an annular locking end 6, and the middle is provided with a cross fixing hole 7. The distance between the annular locking end 6 and the cross fixing hole 7 is 40-60mm, preferably 50mm, and the overall length of the fixing rope 3 is 310-410mm.

[0029] It should be noted that the length of the fixing rope 3 is 360mm in standard length, which can be adjusted by ±50mm according to the distance between the beak locks.

[0030] Specifically, the length of the annular locking end 6 is 8-10mm, and its width can be stretched to 4-8mm; the length of the cross fixing hole 7 is 8-10mm, and its width can be stretched to 4-8mm.

[0031] The fixation cord 3 in the artificial ligament is made of ultra-high molecular weight polyethylene and is made into a flat structure with a width of 5-10mm using a braiding process. This structure can increase the contact area between the fixation cord 3 and the bone surfaces of the clavicle 4 and coracoid process 5, evenly distribute the binding stress, avoid excessive local pressure that could damage the bone cortex, and improve the durability of the fixation cord.

[0032] Specifically, the artificial ligament body is made of ultra-high molecular weight polyethylene braided yarn with a tensile strength ≥2000 N / mm². 2 The traction rope uses non-absorbable surgical sutures with a breaking strength of ≥150N to ensure that it does not fail during traction.

[0033] As a specific implementation method, the annular locking end 6 adopts a hollow tubular structure. Since the annular locking end 6 and the fixing rope 3 form a self-locking structure, a very large cutting stress will be generated between the annular locking end 6 and the fixing rope 3, which will accelerate the wear of the fixing rope 3 and increase the risk of breakage failure. The hollow tubular structure produces a buffering effect, which significantly reduces the cutting effect and improves the durability of the fixing rope 3.

[0034] The end of the fixing rope 3 passes through the annular locking end 6 and forms an "8"-shaped self-locking structure with the cross fixing hole 7 in the middle. Specifically, the annular locking end 6 allows the fixing rope 3 to form a tight loop after wrapping around the clavicle 4, fitting the coracoclavicular ligament stop point on the clavicle 4, simulating the attachment and tension transmission of the normal coracoclavicular ligament; the cross fixing hole 7 provides a channel for the fixing rope 3 to pass through the coracoid process 5, and forms a cross fixing section through the "cross" threading method, so that the fixing rope 3 forms a double binding at the coracoid process 5, enhancing the fixing effect on the coracoid process 5.

[0035] Specifically, the traction rope includes a first traction rope 1 and a second traction rope 2; one end of the first traction rope 1 is connected to the annular locking end 6, and the other end extends outward to guide the tightening and temporary fixation of the fixing rope 3; after the fixing rope 3 is wrapped around the clavicle 4, by pulling the first traction rope 1, the end of the fixing rope 3 can be guided to pass through the annular locking end 6 and tightened, so that the annular loop fits tightly against the coracoclavicular ligament stop point on the clavicle 4, and at the same time, the position of the fixing rope 3 can be temporarily fixed to prevent displacement in subsequent operations.

[0036] One end of the second traction rope is connected to the annular locking end 6, and the middle of the second traction rope 2 is fixed to the fixing rope 3 to form two second traction rope fixing parts 9 spaced apart. The other end extends outward to be used to tie and wrap with the first traction rope 1 to fix the "8"-shaped self-locking structure of the fixing rope. When the middle cross-fixing section of the fixing rope 3 is located above the beak protrusion 5, the second traction rope can stably fix the above-mentioned cross-fixing section by tying and wrapping with the first traction rope 1, preventing it from loosening in subsequent operations and ensuring the stability of the overall "8"-shaped self-locking structure construction process.

[0037] The purpose of setting the second traction rope fixing part 9 is to allow the second traction rope 2 to extend approximately close to the fixing rope 3, preventing the fixing rope 3 from failing to guide the second traction rope 2 through when it passes through the annular locking end 6 and the cross fixing hole 7, thus ensuring that the 8" figure-wrap self-locking structure can effectively bind, pressurize, and stabilize the rope later. The distance between the two second traction rope fixing parts 9 is 80mm-150mm, with the distance between the annular locking end 6 and the nearest second traction rope fixing part 9 being 80-100mm.

[0038] Specifically, the first traction rope 1 has a diameter of 1-3mm and a length of 50-100mm, which ensures sufficient traction strength and facilitates precise operation during surgery. The second traction rope has a diameter of 1-3mm and a length of 310-410mm, which facilitates wrapping around the coracoid process 5, and its length is sufficient to tie and fix it to the figure-eight self-locking structure with the first traction rope 1.

[0039] Specifically, a rivet is provided at the end of the fixing rope to secure it to the shoulder 8.

[0040] The shoulder joint coracoclavicular artificial ligament fixation system of the present invention requires an auxiliary component to bypass the clavicle 4 or coracoid process 5.

[0041] Specifically, the auxiliary component includes a threader; the threader can guide a guide wire around the clavicle 4 or the coracoid process 5, and then, after connecting the guide wire to the fixing rope 3, guide the fixing rope 3 around the clavicle 4 or the coracoid process 5. The threader can be a conventional product commercially available in the art, as long as its hook body can pass around the clavicle 4 or the coracoid process 5; its structure will not be described in detail here.

[0042] Specifically, the fixing rope 3 can wrap around the clavicle 4 at least once, and the end of the fixing rope 3 passes through the annular locking end 6 and is tightened to form an annular loop that fits tightly against the coracoclavicular ligament insertion point on the clavicle 4; the end of the fixing rope 3 can also wrap around the coracoid process 5 once to above the coracoid process 5 and pass through the cross fixing hole 7 to form a cross-shaped fixation. Finally, the end of the fixing rope 3 wraps around the clavicle 4 at least once and is fixed to the acromion 8 by a rivet to form an "8" figure-eight self-locking structure.

[0043] Specifically, when the fixing rope 3 wraps around the beak 5, it can cross and overlap on the beak 5 to form a double-layer binding structure; the cross-fixing section of the fixing rope 3 can be tied with a traction rope to prevent the fixing rope 3 from loosening by using friction.

[0044] The fixation rope 3 first wraps around the clavicle 4 at least once, and its end passes through the loop lock end 6 and is tightened to form a loop, achieving initial fixation of the clavicle 4. Then, the end of the fixation rope 3 wraps around the coracoid process 5 once and upwards, passing through the cross fixation hole 7 to form a cross fixation. At this time, the fixation rope 3 crosses and overlaps at the coracoid process 5 to form a double-layer binding, enhancing the fixation strength of the coracoid process 5. Subsequently, the end of the fixation rope 3 wraps around the clavicle 4 at least once again, and is finally fixed to the acromion 8 with a rivet. In this process, the end of the fixation rope 3 first passes through the loop lock end 6 to form a first self-locking knot, and then passes through the cross fixation hole 7 to form a second self-locking knot. At the same time, the traction rope can be used to wrap and bind the fixation rope 3, increasing friction and effectively preventing the fixation rope 3 from loosening. Meanwhile, the rivet fixation at the acromion 8 provides additional support for the acromioclavicular ligament. The loop lock and cross fixation structures work together to form a composite fixation system of "coracoclavicular ligament reconstruction + acromioclavicular ligament reinforcement", achieving multi-dimensional stable fixation.

[0045] The invention features a double self-locking structure combining a ring-shaped locking loop and a cross-wrapping loop to form a three-dimensional fixation, which simplifies surgical procedures while improving fixation reliability and increasing the strength by more than 40% compared to traditional unidirectional fixation.

[0046] The operation steps of this invention are as follows: S1: Preoperative preparation: Use a length measuring ruler to measure the patient's coracoclavicular distance. Based on the measurement results, select a suitable length of fixation rope 3 from the specification range of 310-410mm, with priority given to the standard length of 360mm, and adjust as needed; at the same time, check the integrity and functional status of the artificial ligament (fixation rope 3, traction rope) and auxiliary components (threader) to ensure that each component is undamaged and can work normally.

[0047] S2: Construction of the proximal clavicle 4 loop: After the acromioclavicular joint dislocation is reduced, the fixation rope 3 is wrapped around the clavicle 4 more than once with the help of a suture threader, so that the fixation rope 3 fits the coracoclavicular ligament insertion point on the clavicle 4; the end of the fixation rope 3 is pulled through the loop locking end 6, and the fixation rope 3 is slowly tightened to form a loop that fits tightly against the clavicle 4, that is, to form the first self-locking knot, and the initial fixation of the clavicle 4 end is completed. At this time, the first traction rope 1 can temporarily fix the position of the fixation rope 3.

[0048] S3: Cross fixation at the end of the coracoid process 5: Use a suture to guide the end of the fixation rope 3 from below the coracoid process 5 through the gap between the clavicle 4 and the coracoid process 5, and wrap around the coracoid process 5 to above the coracoid process 5; adjust the position of the fixation rope 3 so that the end of the fixation rope 3 is aligned with the cross fixation hole 7 in the middle and passes through it to form a cross fixation structure. At this time, the fixation rope 3 crosses and overlaps at the coracoid process 5 to form a double-layer binding.

[0049] S4: Formation of the "8" figure-wrap self-locking structure: Continue to tighten the fixation rope 3 so that the end of the fixation rope 3 passes through the cross fixation hole 7 to form a second self-locking knot. Then guide the end of the fixation rope 3 to wrap around the clavicle 4 at least once again. Finally, the end of the fixation rope 3 can be fixed to the acromion 8 with a rivet to form the "8" figure-wrap self-locking structure, completing the overall structural fixation of the shoulder joint by coracoclavicular ligament reconstruction and acromioclavicular ligament reinforcement repair.

[0050] S5: Cross-fixed section stabilization: Pull the second traction rope 2 to make it intertwine with the first traction rope 1 and tie it together. Bind and strengthen the stability of the cross-fixed section (second self-locking knot) in the middle of the fixing rope 3 located above the beak protrusion 5 to prevent the section from loosening.

[0051] S6: Postoperative examination: Observe whether the fixation system is stable after surgery, check that the fixation rope 3 is not loose, the self-locking knot is not detached, and the rivets are firmly fixed; confirm the accuracy of the fixation position through imaging examination, and monitor the patient's postoperative reaction to assess whether there is soft tissue irritation, pain, etc., to ensure the surgical effect.

[0052] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A shoulder joint coracoclavicular ligament fixation system, characterized in that, It includes an artificial ligament and a traction rope; the artificial ligament is configured to establish an "8"-shaped self-locking structure between the clavicle (4) and the coracoid process (5) for the reconstruction of the coracoclavicular ligament and the repair and reinforcement of the acromioclavicular ligament; the traction rope is connected to the artificial ligament and is used to guide the artificial ligament to be positioned, tightened and fixed.

2. The shoulder joint coracoclavicular artificial ligament fixation system according to claim 1, characterized in that: The artificial ligament includes a fixing rope (3) and an annular locking end (6). One end of the fixing rope (3) is connected to the annular locking end (6). The fixing rope (3) has a cross fixing hole (7) in the middle. The distance between the annular locking end (6) and the cross fixing hole (7) is 40-60mm. The overall length of the fixing rope (3) is 310-410mm.

3. The shoulder joint coracoclavicular artificial ligament fixation system according to claim 2, characterized in that: The length of the annular locking end (6) is 8-10mm; the length of the cross fixing hole (7) is 8-10mm.

4. A shoulder joint coracoclavicular ligament fixation system according to claim 2 or 3, characterized in that: The fixing rope (3) has a flat structure and a width of 5-10mm.

5. A shoulder joint coracoclavicular ligament fixation system according to any one of claims 2-4, characterized in that: The traction rope includes a first traction rope (1) and a second traction rope (2); one end of the first traction rope (1) is connected to the annular lock end (6), and the other end extends outward to guide the tightening and temporary fixation of the fixing rope (3); one end of the second traction rope (2) is connected to the annular lock end (6), and the middle part of the second traction rope (2) is fixed on the fixing rope (3) to form two second traction rope fixing parts (9), and the other end extends outward to tie and fix the figure-eight self-locking structure with the first traction rope (1).

6. The shoulder joint coracoclavicular artificial ligament fixation system according to claim 5, characterized in that: The first traction rope (1) has a diameter of 1-3mm and a length of 50-100mm.

7. The shoulder joint coracoclavicular ligament fixation system according to claim 5, characterized in that: The second traction rope (2) has a diameter of 1-3mm and a length of 310-410mm.

8. The shoulder joint coracoclavicular artificial ligament fixation system according to claim 5, characterized in that: The end of the fixing rope (3) is provided with a rivet.

9. A shoulder joint coracoclavicular artificial ligament fixation system according to claim 2, characterized in that: The fixing rope (3) is configured to wrap around the clavicle (4) at least once, and the end of the fixing rope (3) is pulled tight after passing through the annular locking end (6) to form an annular loop that fits tightly against the coracoclavicular ligament insertion point of the clavicle (4); The end of the fixing rope (3) can also wrap around the coracoid process (5) from below to above the coracoid process (5) and pass through the cross fixing hole (7) to form a self-locking cross fixation. Finally, the end of the fixing rope (3) wraps around the clavicle (4) from above at least once and is fixed to the acromion (8) by rivets to form an "8" figure-wrap self-locking structure.

10. The shoulder joint coracoclavicular artificial ligament fixation system according to claim 1, characterized in that: The artificial ligament is made of ultra-high molecular weight polyethylene braided thread, and the traction rope is made of non-absorbable surgical sutures.

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