An artificial braided ligament

Abstract

The present application relates to an artificial braided ligament, and relates to the technical field of artificial braided ligaments. The artificial braided ligament includes a plurality of braided bodies with different diameters and in a tubular structure. The plurality of braided bodies are nested with each other and connected to each other by fixings to form a ligament. The present application pre-fabricates a plurality of braided bodies with different diameters, and then nests the plurality of braided bodies with different diameters together according to the required ligament diameter. The plurality of braided bodies are fixedly connected to form a ligament by fixings. Therefore, there is no need for on-site rolling, and the requirements of different diameters can be met without cutting, so that the doctor can focus more on the operation, thereby improving the implantation effect and improving the quality and efficiency of the operation.

Description

Technical Field

[0001] The present application relates to the technical field of artificial ligaments, and in particular to an artificial braided ligament. Background Art

[0002] The LARS artificial ligament is made of polyester material and has high biocompatibility and mechanical properties. It is suitable for patients with ruptured or severe injury of the anterior cruciate ligament of the knee caused by sports injuries, traffic accidents or other reasons. Its main advantage is rapid postoperative recovery and its porous structure better facilitates bone tissue ingrowth.

[0003] However, the LARS artificial ligament currently on the market adopts a sheet-like woven structure. When implanted, the sheet-like woven structure needs to be rolled into a cylindrical structure, forming a shape that is narrow at both ends and wide in the middle, and then tied with sutures to achieve the effect of simulating a ligament. The two ends of the ligament are then connected to the joint. However, this structure is highly dependent on the doctor's rolling technique during the operation, and it is not convenient to adjust the diameter of the artificial ligament. It needs to be cut, which will result in uneven edges of the artificial ligament, affecting the implantation effect, and thus affecting the quality and efficiency of the operation. Summary of the Invention

[0004] In order to improve the quality and efficiency of surgery, the present application provides an artificial braided ligament.

[0005] The present application provides an artificial braided ligament, which adopts the following technical solution:

[0006] An artificial braided ligament comprises a plurality of braided bodies of different diameters and in a tubular structure. The plurality of braided bodies are nested with one another and connected to one another via fixings to form a ligament. The braided bodies comprise a connection region and braided regions located at both ends of the connection region. The fixings are a plurality of groups of braided fixing threads distributed along the axis of the braided bodies. Each group of braided fixing threads sequentially and reciprocally passes through the braided regions of the plurality of braided bodies in the circumferential direction of the braided bodies for stitching.

[0007] By adopting the above technical solution, multiple braided bodies of different diameters are pre-made, and then the multiple braided bodies of different diameters are nested together according to the required ligament diameter. The multiple braided bodies are fixedly connected by fixing parts to form a ligament. The multiple nested ligaments increase their strength, so that the strength of the finally formed ligament can meet the needs of the operation. Therefore, there is no need for on-site rolling, and it can also meet the needs of different diameters without cutting, so that the doctor can concentrate more on the operation, improve the implantation effect, and improve the quality and efficiency of the operation.

[0008] The two weaving areas are used to connect with the joint to meet the connection requirements, and the connection area is used to meet the needs of subsequent joint activities. The two requirements are different, so different functional partitions are used to meet the needs of connection and activity, which can greatly improve the quality of artificial ligaments and post-operative quality, and improve the quality and efficiency of surgery.

[0009] A set of braided fixing lines is used to pass through the braided areas of multiple braided bodies in sequence and reciprocally on the same horizontal plane for suturing, and the multiple braided bodies are connected into one by the cooperation of multiple sets of braided fixing lines, thereby improving the firmness of the multiple braided bodies after connection, and also improving the convenience in the sewing process, thereby improving the quality and efficiency of the operation; and the connection area has higher requirements due to the need for ligaments during joint movement, so the braided fixing line passes through the braided area instead of the connection area, thereby reducing the adverse effects of the braided fixing line on the connection area when connected, further improving the quality of the ligament and improving the quality of the operation.

[0010] Optionally, the weaving area is a rectangular sheet structure after unfolding and has interconnected edge sealing structures on the four sides. The weaving area includes several groups of weft threads and several weaving warps. Several groups of weft threads are arranged horizontally and each group of weft threads includes two weft threads that are intertwined with each other and in a spiral state; several of the weaving warps are arranged longitudinally and are woven in series with several groups of weft threads.

[0011] By adopting the above technical solution, the braided area needs to be connected to the joint, and after the connection, the bone tissue needs to enter the braided area and be fixedly connected as one. Therefore, a porous structure is formed by the cooperation of the weft and the warp, so that the bone tissue grows through the porous structure and is connected as one, thereby improving the stability of the braided area after the connection with the joint. Furthermore, the two wefts in each group are intertwined and spiral, so that human tissue grows into the spiral gap. The spiral bone tissue can further improve the firmness of the connection, thereby further improving the stability of the braided area after the connection with the joint and improving the quality of the operation.

[0012] At the same time, the edge sealing structure can improve the stability and firmness of the braided area structure, thereby further improving the stability of the braided area after connection with the joint and improving the quality of the operation.

[0013] Optionally, the woven body is formed by rolling the woven area into a tubular structure and then sewing it with a suture thread. The two edge sealing structures that are in contact with the woven area when rolling are edge sealing one and the other two edge sealing structures are edge sealing two. When sewing, the suture thread is spirally wound around the two edge sealing twos located at both ends of the woven body and cross-wound around the edge sealing one and fixed after being tightened. The edge sealing one is made of non-elastic material, and the edge sealing two is made of elastic material and shrinks to form a closed shape under the pulling action of the suture thread.

[0014] By adopting the above technical solution, the two woven areas are rolled into a cylindrical structure so that the two edge seals 1 are pressed against each other for positioning, the suture thread is spirally wrapped around the edge seal 2 at one end, and then the suture threads are cross-wound around the two contacting edge seals 1, and finally the suture thread is spirally wrapped around the edge seal 2 at the other end, and finally the suture thread is tightened to fix it, so that the two edge seals 1 are pressed against each other for positioning, and at the same time, when the suture thread is tightened, the two edge seals 2 can also shrink to form a shrinking shape.

[0015] By positioning the two side seals made of non-elastic material against each other, the two side seals can be made of a material with high stability and hardness, so that the woven body can maintain the required stability after suturing, reducing the probability of deformation due to the warp and weft lines abutting against each other, and improving the quality of the ligament. At the same time, the side seal 2 forms a closing shape, that is, the two ends of the woven body form an inward-shrinking guide structure, which facilitates the implantation of the two ends of the woven body into the joint, improves the convenience of the doctor during surgery, and thereby improves the quality and efficiency of the surgery.

[0016] Optionally, the connecting area is composed of a plurality of longitudinally arranged connecting warps, and the plurality of connecting warps are woven with the wefts located in the two weaving areas.

[0017] By adopting the above technical solution, several longitudinally arranged connecting warps, that is, the connecting warps are arranged in the direction from one joint to another, and the connecting warps on multiple woven bodies cooperate to form a mesh structure. The connecting warps on multiple woven bodies are not connected to each other through the connecting structure, so they can better simulate the state of natural ligaments, improve the quality of the ligaments, and improve the quality and efficiency of the operation.

[0018] Optionally, two titanium plate fixing wires are laterally arranged on each of the two braided areas and are mirror-imaged with respect to the axis of the braided body. The titanium plate fixing wires are used to connect with the titanium plate body during surgery to achieve ligament fixation.

[0019] By adopting the above technical solution, after the two ends of the ligament are implanted into the two joints, a fixing wire needs to be connected to the titanium plate to position the two ends of the ligament. Therefore, the fixing wire needs to be tied to the two ends of the ligament, and then the fixing wire is passed through the joint. At the same time, the movement of the two fixing wires also pulls the two ends of the ligament to be implanted into the joint, and finally the fixing wire is fixedly connected to the titanium plate to fix the two ends of the ligament. However, it is difficult to ensure the firmness between the fixing wire and the ligament by on-site binding, and it also takes some time, which reduces the quality and efficiency of the operation.

[0020] The titanium plate fixing wire is woven into one when the braided body is woven. Therefore, during the operation, the titanium plate fixing wires at both ends of the braided body are passed through the two joints in turn. The fixing wires move and pull the two ends of the ligament to be implanted into the two joints. Finally, the titanium plate fixing wires are fixedly connected to the titanium plate body to fix the two ends of the ligament, thereby improving the firmness between the titanium plate fixing wire and the ligament and the titanium plate body, and there is no need to tie the titanium plate fixing wire, thereby improving the quality and efficiency of the operation.

[0021] Optionally, two titanium plate fixing wires located in the same braiding area are arranged in a circular array around the axis of the braiding body at an angle of 40°-50°, and the two titanium plate fixing wires penetrate from the side wall of the braiding body toward the axis of the braiding body and then pass out parallel to the axis of the braiding body.

[0022] By adopting the above technical solution, when the titanium plate fixing wire and the braided body are coaxially arranged, the force between the titanium plate fixing wire and the braided body is most balanced, thereby improving the stability between the two. At the same time, the titanium plate fixing wire is woven on the braided body, so the angle at which the titanium plate fixing wire enters the axis of the braided body and the position of the titanium plate fixing wire on the braided body will also affect the stability between the two. Therefore, entering at an angle of 40°-50° makes the stability between the two the best, thereby improving the quality and efficiency of the operation.

[0023] Optionally, at least two thickened areas are provided on the braided area, and the thickened areas are single-layer annular braided structures.

[0024] By adopting the above technical solution, the thickened area can make the contact with the bone tunnel closer, thereby enhancing the overall strength after the bone tissue grows in.

[0025] Optionally, the width of the thickened area is 1.2-5 mm, and the distance between two adjacent thickened areas is between 5 mm and 10 mm.

[0026] By adopting the above technical solution, multiple thickened areas can cooperate to achieve the above effects. At the same time, the arrangement data of the thickened areas can be obtained according to the diameter of the woven body, so that the arrangement data of the thickened areas matches the diameter of the woven body, making the contact with the bone tunnel closer, while also reducing the adverse effects on the diameter of the woven body.

[0027] Optionally, the material of one of the weft threads in each group is one of polytetrafluoroethylene, polyethylene, polycaprolactone, polylactic acid, and polyvinyl alcohol, and the material of the other weft thread is titanium alloy.

[0028] By adopting the above technical solution, one of the wefts can simulate the effect of the basic ligament, while the other weft titanium alloy can improve the strength of the braided area, improve the quality of the ligament, and improve the quality of the operation.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. By pre-fabricating multiple braided bodies of different diameters, and then fitting them together according to the required ligament diameter, the multiple braided bodies are fixedly connected by fixing parts to form a ligament. Therefore, there is no need for on-site rolling, and it can also meet the needs of different diameters without cutting, allowing doctors to focus more on the operation, improving the implantation effect, and improving the quality and efficiency of the operation.

[0031] 2. By combining the weft and warp threads to form a porous structure, bone tissue can grow through the porous structure and become one, thereby improving the stability of the braided area after being connected to the joint. It also allows human tissue to grow into the spiral gap. The spiral bone tissue can further improve the firmness of the connection, thereby further improving the stability of the braided area after being connected to the joint and improving the quality of the operation.

[0032] 3. The two side seals made of non-elastic material are pressed against each other for positioning, so that the woven body can maintain the required stability after suturing, reducing the probability of deformation due to the warp and weft lines pressing against each other, and improving the quality of the ligament. At the same time, the side seals are formed into a closed shape, which makes it easier to implant the two ends of the woven body into the joint, improving the convenience of the doctor during surgery, thereby improving the quality and efficiency of the surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure of artificial braided ligament surgery in the prior art;

[0034] Figure 2 It is a schematic diagram of the planar structure of the artificial braided ligament;

[0035] Figure 3 This is a schematic diagram of the structure of the braided body, fixation parts and titanium plate fixation line in the artificial braided ligament;

[0036] Figure 4 It is a schematic diagram of the structure of the braided area in the artificial braided ligament;

[0037] Figure 5 This is a schematic diagram of the structure of the braided body in the artificial braided ligament when it is rolled.

[0038] Figure numerals: 1. joint; 11. bone tunnel one; 12. bone tunnel two; 13. fixation line body; 14. titanium plate body; 2. woven body; 21. connection area; 22. woven area; 23. weft; 24. woven warp; 25. connection warp; 26. thickened area; 31. woven fixation line; 4. edge sealing structure; 41. edge sealing one; 42. edge sealing two; 5. titanium plate fixation line; 6. suture line. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-5 This application is described in further detail.

[0040] The embodiments of the present application disclose an artificial braided ligament.

[0041] Reference Figure 1 In the prior art, during artificial ligament surgery, it is necessary to first use tools to open a bone tunnel 11 and a bone tunnel 2 12 that are interconnected on the two joints 1 at the surgical site. The diameter of the bone tunnel 11 is larger than the diameter of the bone tunnel 2 12. At the same time, the two bone tunnels 11 are located on the opposite side walls of the two joints 1, and the two bone tunnels 2 12 pass through the opposite side walls of the two joints 1; two fixing wires 13 are connected to the two ends of the ligament, and then the two fixing wires 13 are respectively passed through the bone tunnel 1 11 and the bone tunnel 2 12, and the two fixing wires 13 are pulled so that the two ends of the ligament are implanted into the two bone tunnels 1 11. Finally, the two fixing wires 13 are fixedly installed on two titanium plates 14, and the two titanium plates 14 are pressed against the opposite side walls of the two joints 1 to achieve the positioning of the two ends of the ligament.

[0042] Reference Figure 2 and Figure 3 The artificial braided ligament includes multiple braided bodies 2 of varying diameters and in a tubular structure. The multiple braided bodies 2 are nested within one another and connected via fasteners to form an artificial ligament. Based on the desired ligament diameter, the multiple braided bodies 2 are nested within one another and then connected together via fasteners to form a ligament. The outer diameter of the outermost braided body 2 corresponds to the desired ligament diameter. The nested braided bodies 2 form a nearly solid structure, thereby increasing the strength of the ligament to meet the required strength. Therefore, doctors do not need to roll the ligament on-site during surgery, and the system can meet the requirements of different diameters, allowing them to focus more on the surgery, improving implant effectiveness, and enhancing the quality and efficiency of the surgery.

[0043] Reference Figure 2 and Figure 4 The woven body 2 includes a connecting area 21 and a woven area 22 located at both ends of the connecting area 21. When unfolded, the woven area 22 and the connecting area 21 both present a rectangular sheet structure. The four sides of the woven area 22 are provided with an interconnected edge sealing structure 4; the woven area 22 includes a plurality of groups of weft threads 23 and a plurality of weaving warps 24. The plurality of groups of weft threads 23 are arranged transversely, that is, spaced apart along the axis of the woven body 2. Each group of weft threads 23 includes two weft threads 23 that are intertwined and spirally formed. One of the weft threads 23 is made of one of polytetrafluoroethylene, polyethylene, polycaprolactone, polylactic acid, and polyvinyl alcohol, and the other weft thread 23 is made of titanium alloy.

[0044] Several warp threads 24 are arranged longitudinally, that is, spaced apart in a direction perpendicular to the axis of the braided body 2. These warp threads 24 are woven in series with several groups of weft threads 23 to form the braided area 22. The connecting area 21 is composed of several longitudinally arranged connecting warp threads 25, which are interwoven with the weft threads 23 located in the two braided areas 22. The two vertically arranged edge banding structures 4 on the braided area 22 are edge banding 1 41 and are made of a non-elastic material, while the two transversely arranged edge banding structures 4 are edge banding 2 42 and are made of an elastic material.

[0045] Reference Figure 2 and Figure 5 The braided body 2 is formed by rolling the two braided areas 22 into a tubular structure and then sewing them with a suture 6. During rolling, the connecting area 21 also forms a tubular structure, and the two edge seals 41 located in the two braided areas 22 are both pressed against each other for positioning during rolling. When sewing, the suture 6 is spirally wound around the edge seal 2 42 and then cross-wound around the edge seal 1 41, and finally spirally wound around the edge seal 2 42 on the other side. Finally, the suture 6 is tightened for sewing and fixing, so that the two edge seals 41 are pressed against each other for positioning, and when the suture 6 is tightened, the two edge seals 42 are contracted and closed inward, so that the two ends of the braided body 2 form a guide portion that is convenient for implantation.

[0046] Reference Figure 2 and Figure 3 The fixing parts are several groups of braided fixing lines 31 spaced apart along the axis of the braided body 2. Each group of braided fixing lines 31 is on the same horizontal plane and passes through the braided areas 22 of multiple braided bodies 2 back and forth in the circumferential direction of the braided body 2 for stitching.

[0047] Reference Figure 1 and Figure 2 Both braided areas 22 are provided with multiple groups of thickened areas 26 spaced around the axis of the braided body 2. There are at least two groups of thickened areas 26, and the thickened areas 26 are a single-layer annular braided structure, which is the same as the structure of the braided area 22. The width of the thickened areas 26 is 1.2-5 mm, and the distance between two adjacent thickened areas 26 is between 5 mm and 10 mm. According to design requirements, the thickened areas 26 are provided on the outside or inside or on both sides of the cylindrical structure of the braided area 22, so that the braided area 22 is in closer contact with the bone tunnel 11 and the bone tunnel 2 12, thereby enhancing the overall strength after bone tissue ingrowth.

[0048] The distance between one end of the two braided areas 22 away from the connection area 21 and the connection area 21 is L. Two titanium plate fixing wires 5 for connecting and fixing with the titanium plate body 14 are horizontally arranged on the two braided areas 22 and located at L / 2, that is, each braided body 2 is provided with a titanium plate fixing wire 5, which can be selected according to needs during surgery. If there are extra titanium plate fixing wires 5, the doctor can cut off the titanium plate fixing wires 5.

[0049] The two titanium plate fixing wires 5 are arranged in a circular array around the axis of the braided body 2, and the angle between the two titanium plate fixing wires 5 is 40°-50°, so that the two titanium plate fixing wires 5 pass through the side wall of the braided area 22 at the above angle and then penetrate into the axis of the braided body 2. Finally, the two titanium plate fixing wires 5 pass through the axis of the braided body 2 in parallel with each other, so that the hand direction of the titanium plate fixing wires 5 relative to the braided body 2 can be as close as possible to the axis of the braided body 2 or even coincide with the axis of the braided body 2, thereby improving the stability of the ligament during stress.

[0050] During the operation, the doctor can directly pass the titanium plate fixing wire 5 through the bone tunnel 11 and the bone tunnel 2 12 in sequence. The movement of the two titanium plate fixing wires 5 can pull the two ends of the ligament to be implanted into the two bone tunnels 11 respectively. Finally, the two titanium plate bodies 14 are connected to the two titanium plate fixing wires 5, so that the two titanium plate bodies 14 are positioned against the two joints 1, thereby realizing the implantation of the ligament. There is no need to tie the titanium plate fixing wire 5 to the ligament on site, which saves the time of the operation and improves the stability of the ligament, thereby improving the quality and efficiency of the operation.

[0051] The working principle of the embodiment of this application is as follows:

[0052] Before the operation, according to the required diameter of the ligament, multiple braided bodies 2 are placed on each other, and then multiple groups of braided fixing lines 31 are passed through the multiple braided bodies 2 in sequence, so as to achieve fixed connection of the multiple braided bodies 2, so as to obtain an artificial ligament of the required diameter. After the multiple braided bodies 2 are placed on each other, the strength of the ligament meets the requirements. Therefore, the doctor does not need to roll it on site during the operation, and it can also meet the needs of different diameters, so that the doctor can concentrate more on the operation, improve the implantation effect, and improve the quality and efficiency of the operation.

[0053] During the operation, the doctor passes the titanium plate fixing wires 5 at both ends of the ligament through bone tunnel 1 11 and bone tunnel 2 12. The movement of the two titanium plate fixing wires 5 can pull the two ends of the ligament to be implanted into the two bone tunnels 1 11 respectively. Finally, the two titanium plate bodies 14 are connected to the two titanium plate fixing wires 5 so that the two titanium plate bodies 14 are positioned against the two joints 1 to achieve the implantation of the ligament. There is no need to tie the titanium plate fixing wires 5 to the ligament on site, which saves the time of the operation, improves the stability of the ligament, and improves the quality and efficiency of the operation.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An artificial braided ligament, characterized in that: The invention comprises a plurality of braided bodies (2) having different diameters and in a cylindrical structure, wherein the plurality of braided bodies (2) are mutually sleeved and connected to each other via fixing members to form a ligament; the braided body (2) comprises a connection area (21) and braided areas (22) located at both ends of the connection area (21); the fixing members are a plurality of groups of braided fixing lines (31) distributed along the axis of the braided body (2); each group of the braided fixing lines (31) sequentially and reciprocally passes through the braided areas (22) of the plurality of braided bodies (2) in the circumferential direction of the braided body (2) to perform suturing; The braided area (22) is a rectangular sheet structure when unfolded, and the four sides are provided with interconnected edge sealing structures (4); The braided body (2) is formed by rolling the braided area (22) into a cylindrical structure and then sewing it with a suture (6). The two edge sealing structures (4) that are in contact with the braided area (22) when rolled are edge sealing one (41) and the other two edge sealing structures (4) are edge sealing two (42). When sewing, the suture (6) is spirally wound around the two edge sealing twos (42) located at both ends of the braided body (2) and then cross-wound around the edge sealing one (41) and tightened to fix it. The edge sealing one (41) is made of non-elastic material, and the edge sealing two (42) is made of elastic material and shrinks under the pulling action of the suture (6) to form a closed shape.

2. The artificial braided ligament according to claim 1, characterized in that: The weaving area (22) includes a plurality of groups of weft threads (23) and a plurality of weaving warp threads (24), wherein the plurality of groups of weft threads (23) are arranged transversely and each group of weft threads (23) includes two weft threads (23) that are intertwined with each other and in a spiral state; and the plurality of weaving warp threads (24) are arranged longitudinally and are woven in series with the plurality of groups of weft threads (23).

3. The artificial braided ligament according to claim 2, characterized in that: The connecting area (21) is composed of a plurality of longitudinally arranged connecting warps (25), and the plurality of connecting warps (25) are woven with the wefts (23) located in the two weaving areas (22).

4. The artificial braided ligament according to claim 2, characterized in that: Two titanium plate fixing wires (5) mirror-imaged about the axis of the braided body (2) are laterally arranged on each of the two braided areas (22). The titanium plate fixing wires (5) are used to connect with the titanium plate body (14) during surgery to achieve ligament fixation.

5. The artificial braided ligament according to claim 4, characterized in that: The two titanium plate fixing wires (5) located at the same braiding area (22) are arranged in a circular array around the axis of the braiding body (2) at an angle of 40°-50°. The two titanium plate fixing wires (5) penetrate from the side wall of the braiding body (2) toward the axis of the braiding body (2) and then pass out parallel to the axis of the braiding body (2).

6. The artificial braided ligament according to claim 1, characterized in that: At least two thickened areas (26) are provided on the braided area (22), and the thickened areas (26) are single-layer annular braided structures.

7. The artificial braided ligament according to claim 6, characterized in that: The width of the thickened area (26) is 1.2-5 mm, and the distance between two adjacent thickened areas (26) is between 5 mm and 10 mm.

8. The artificial braided ligament according to claim 2, characterized in that: The material of one of the weft threads (23) in each group is one of polytetrafluoroethylene, polyethylene, polycaprolactone, polylactic acid, and polyvinyl alcohol, and the material of the other weft thread (23) is titanium alloy.

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