Artificial ligament device with high-strength structure

Abstract

The invention belongs to the technical field of orthopedic medical instruments, and particularly relates to an artificial ligament device with a high-strength structure, which can improve the strength of an artificial ligament, reduce friction between the artificial ligament and posterior crossover and intercondylar fossa, recover the function of joints in an early stage and improve the joint quality. The artificial ligament is composed of an artificial ligament body and an outer net sleeve and is of a three-section structure comprising an artificial ligament front section, an artificial ligament middle section and an artificial ligament rear section, an elastic band is wound around the outer net sleeve, and the outer net sleeve part of the artificial ligament front section and the outer net sleeve part of the artificial ligament rear section are triangular meshes in the natural state. And the external net sleeve part of the artificial ligament middle section is provided with rhombic meshes in a natural state.

Description

Technical Field

[0001] The invention belongs to the technical field of orthopedic medical devices, and specifically relates to an artificial ligament device with a high-strength structure. Background Art

[0002] Ligament injury / rupture is the most common sports injury, and joint stability is often restored by ligament reconstruction. The anterior cruciate ligament is the most common ligament injury, and its mainstream reconstruction method is often through tendons taken from other parts of the body. It can also be reconstructed through allogeneic tendons or artificial ligaments. However, taking autologous tendons not only consumes tendons from other parts of the body, but also increases unnecessary trauma and affects the original function of the tendon-taking site. The artificial ligaments currently available on the market are not only inferior to autologous tendons in terms of functionality and effectiveness, but also expensive.

[0003] It is currently believed that artificial ligaments cannot achieve satisfactory results because they have no changes in elasticity and structure compared to the original ligament or autologous transplanted tendon. The knee joint not only rotates during flexion and extension, but also partially slides. If the reconstructed ligament is inelastic, it may not only cause the flexion and extension to be too loose or too tight due to the lack of rotation angle, but may also increase wear and tear and eventually lead to rupture or failure of the artificial ligament (joint laxity). Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a high-strength structural artificial ligament device, which can improve the strength of the artificial ligament, reduce the friction with the posterior cruciate and intercondylar fossa, and restore the function of the joint at an early stage.

[0005] The technical solution is as follows: a high-strength structural artificial ligament device, characterized in that it is composed of an artificial ligament and an external mesh sleeve and forms a three-section structure of an artificial ligament front section, an artificial ligament middle section, and an artificial ligament back section, an elastic band is wrapped around the external mesh sleeve, the external mesh sleeve parts of the artificial ligament front section and the artificial ligament back section are triangular meshes in a natural state, and the external mesh sleeve part of the artificial ligament middle section is a diamond mesh in a natural state.

[0006] It is further characterized in that six artificial ligaments are sheathed inside the external mesh sleeve; The elastic band is arranged axially at the front section and the rear section of the artificial ligament, and is arranged spirally at the middle section of the artificial ligament.

[0007] After adopting the present invention, the artificial ligament device is divided into three sections. The front and rear sections are stable and will not be stretched when subjected to force, while the middle section can be stretched and transformed from a circle to an ellipse. The elastic band on the external mesh sleeve can participate in resisting tension after being stretched, thereby improving the corresponding strength and elasticity while reducing friction with the posterior cruciate and intercondylar fossa. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the natural state of the artificial ligament device of the present invention; Figure 2 This is a schematic diagram of the artificial ligament device of the present invention in a stretched state (the elastic band is omitted); Figure 3 It is a schematic diagram of the cross-sectional changes of the artificial ligament device; Figure 4 Schematic diagram of the mesh of the anterior segment of the artificial ligament (posterior segment of the artificial ligament); Figure 5 Schematic diagram of the mesh in the middle section of the artificial ligament. DETAILED DESCRIPTION

[0009] See Figures 1 to 5 As shown, a high-strength artificial ligament device is composed of six artificial ligaments 1 and an external mesh sleeve 2, forming a three-section structure of an artificial ligament front section 3, an artificial ligament middle section 4, and an artificial ligament rear section 5. An elastic band 6 is wrapped around the external mesh sleeve 2. The elastic band 6 is arranged axially in the artificial ligament front section 3 and the artificial ligament rear section 5, and is arranged spirally in the artificial ligament middle section 4.

[0010] The external mesh parts of the artificial ligament front section 3 and the artificial ligament rear section 5 are regular triangle meshes in the natural state, and the external mesh part of the artificial ligament middle section 4 is rhombus meshes in the natural state.

[0011] When the artificial ligament device is stretched, the middle section 4 of the artificial ligament is stressed first, and as the stress increases, the elastic band 6 also begins to participate in the tension resistance, that is, jointly resist the tension. The mesh structure on the external mesh sleeve at the middle section 4 of the artificial ligament is unstable, and after being stretched, it will form a square structure, while the mesh of the front section 3 of the artificial ligament and the rear section 5 of the artificial ligament are stable triangles, which will not be deformed and have a stable structure.

[0012] After the middle section 4 of the artificial ligament is stretched, the original circular cross-section is stretched into an elliptical shape, and combined with the spirally arranged elastic band, a special elliptical DNA semi-helical structure is formed, which has sufficient toughness, high strength, and good elasticity. After deformation, it can effectively reduce the friction with the posterior cruciate and intercondylar fossa.

[0013] Through the present invention, medical personnel can allow patients with ligament injuries to obtain the same elasticity and effective joint stability as the original ligaments, without having to take tendons from other parts of the body, reducing pain and loss of corresponding functions at the tendon removal site, and restoring joint function early.

Claims

1. A high-strength artificial ligament device, characterized in that: It is composed of an artificial ligament and an external mesh sleeve, forming a three-section structure of an artificial ligament front section, an artificial ligament middle section, and an artificial ligament back section. An elastic band is wrapped around the external mesh sleeve. The external mesh sleeve parts of the artificial ligament front section and the artificial ligament back section are triangular meshes in a natural state, and the external mesh sleeve part of the artificial ligament middle section is a four-pointed star mesh in a natural state.

2. A high-strength artificial ligament device according to claim 1, characterized in that: Six artificial ligaments are sheathed inside the external mesh sleeve.

3. The high-strength artificial ligament device according to claim 1, characterized in that: The elastic band is arranged axially at the front section and the rear section of the artificial ligament, and is arranged spirally at the middle section of the artificial ligament.

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