Artificially woven ligament and weaving method

Abstract

The invention relates to an artificial woven ligament and a weaving method, and relates to the technical field of medical prosthesis replacement. The invention relates to an artificial woven ligament, in particular to an artificial woven ligament which comprises two woven bodies and a non-woven body which is located between the two woven bodies and connected with the two woven bodies respectively. The woven body comprises a plurality of cylindrical single-layer woven cylinders which are sequentially arranged from inside to outside in a sleeving mode, and the ends, away from the non-woven body, of the single-layer woven cylinders form a conical body. A plurality of weaving fixing lines are connected between the single-layer weaving barrels. The artificial woven ligament has the advantages that the artificial woven ligament does not depend on weaving and cutting techniques of doctors, the diameter of the woven fabric can be changed according to actual conditions of patients, and different requirements of ACL reconstruction implants are met.

Description

Technical Field

[0001] The invention belongs to the field of medical prosthesis replacement, and in particular relates to an artificial braided ligament and a braiding method. Background Art

[0002] Artificial ligaments are medical implants used to replace or reinforce damaged ligaments. They are usually made of highly elastic and tough materials to mimic the function of normal ligaments in the human body.

[0003] The artificial ligament is made of polyester material and has high biocompatibility and mechanical properties. It is suitable for patients with ruptured or severe damage to the anterior cruciate ligament of the knee due to sports injuries, traffic accidents or other reasons.

[0004] The artificial ligaments currently on the market use a sheet-like braided structure. When implanted, the sheet-like braided structure is rolled up and then tied with sutures to achieve the effect of simulating a ligament. On the one hand, this type of structure is not conducive to the operation, and it depends on the doctor's technique of rolling the braided structure, which affects the quality and efficiency of the operation. On the other hand, the diameter of the braided tendon needs to be adjusted according to the patient's practical situation. However, the diameter of the braided tendon is not convenient to adjust and needs to be cut, which will also cause the edge of the artificial ligament to be uneven, affecting the implantation effect. Summary of the invention

[0005] We hope to provide an artificial braided ligament that is independent of the doctor's braiding and cutting techniques and can change the diameter of the braid according to the patient's actual situation to meet the different needs of ACL reconstruction implants.

[0006] In a first aspect, the present application provides an artificial braided ligament, which adopts the following technical solution: An artificial braided ligament comprises two braided bodies and a non-braided body located between the two braided bodies and respectively connecting the two braided bodies; The braided body comprises a plurality of cylindrical single-layer braided tubes which are sequentially sleeved from the inside to the outside, and the ends of the plurality of single-layer braided tubes which are away from the non-braided body together form a cone; A plurality of braiding fixing wires are connected between each of the single-layer braiding tubes.

[0007] By adopting the above technical solution, a plurality of cylindrical single-layer braided tubes are sequentially sleeved to form a braided body. The single-layer braided tubes can be increased or decreased according to the needs of different patients, thereby achieving the purpose of adjusting the number of layers of the braided body. Each of the single-layer braided tubes has not been cut, and the yarns are completely connected. When combined together, a single-piece solid braided body structure is formed through a plurality of braided fixing lines. It does not generate the uncertainty caused by the doctor's own technique of cutting the ligament, and can adapt to the needs of different patients for ligaments of different diameters. In addition, the present application does not require cutting of the braided body, and can maintain the connection between the yarns, so that the strength of the entire braided body is more guaranteed.

[0008] The ends of the two braided bodies also form a cone-shaped body that is easy to implant into the femur and tibia. At the same time, the two braided bodies are braided and fixed into one by a braided fixing line, so as to achieve an overall braiding and non-cutting mode.

[0009] Optionally, there are at least four single-layer braided tubes, each of which is formed by curling a rectangular woven sheet, and the rectangular woven sheet includes an upper edge sealing structure, a lower edge sealing structure, a left edge sealing structure and a right edge sealing structure, and the left edge sealing structure and the right edge sealing structure are connected by cross-arranged suture lines.

[0010] By adopting the above technical solution, rectangular woven sheets are used to form each single-layer woven tube, and edge sealing measures are implemented on all sides of the rectangular woven sheet. When the left and right edge seals are fixed together, cross-arranged stitching lines are used to make the two edge seals difficult to separate, thereby ensuring the strength of the single single-layer woven tube.

[0011] Optionally, the braided fixing wire includes an inclined portion passing through the generatrix of the cone and a serpentine bending portion connecting the inclined portion; The bending portion is used to connect the side wall and the lower edge sealing structure of each single-layer braided tube.

[0012] By adopting the above-mentioned technical scheme, each single-layer braided tube forming a cone is connected from the outside through the inclined portion, each inclined portion forms a conical connecting surface, and the bending portion connected to the inclined portion is connected to the side wall of each single-layer braided tube in the radial and transverse directions, thereby forming a conical surface connection for each single-layer braided tube. Combined with the internal transverse and longitudinal staggered connection, it is like entangled with multiple snakes as a whole, forming countless connection nets inside the braided body. Compared with the one-piece braided body, the connection strength is better and the diameter of the ligament can be adjusted according to the patient's needs.

[0013] Optionally, the bending portion includes an oblique body and a comb-tooth portion, one end of which is connected to the inclined portion and the other end of which is inclined toward the non-woven body side.

[0014] By adopting the above technical solution, the inclined portion of the braided fixing line is set to a certain inclined angle, so that the braided fixing line coming from the cone body can have a better pulling effect on each single-layer braided tube, and the fixed connection effect is better.

[0015] Optionally, the non-woven body comprises a plurality of sutures, and the single-layer woven tubes with the same diameter in the two woven bodies are connected evenly spaced apart by the plurality of sutures.

[0016] By adopting the above technical solution, a connection mode with a ring-shaped cross-section is formed between each of the two single-layer braided tubes facing each other upward and downward, and the cross-sections of the stitches between all the single-layer braided tubes facing each other upward and downward are spliced ​​to form multiple circular rings, thereby forming a multi-layer connecting ring between the upper and lower braided bodies, and the overall connection strength is enhanced.

[0017] Optionally, two titanium plate fixing lines are mirror-imaged on one of the braids, each titanium plate fixing line comprises a penetration portion radially arranged along the braid, an arc portion arranged along the outer wall of the braid, and an exit portion radially arranged along the braid, and the penetration portion and the exit portion are arranged at an angle.

[0018] By adopting the above technical solution, the titanium plate is fixed to the femoral end, and the ligament can be fixed to the femur through the titanium plate fixing wire on the braided body, and the titanium plate fixing wire is mirrored in the circumferential direction of the braided body, so that the braided ligament will be fixed more firmly and can better withstand various external forces.

[0019] Optionally, the widths of the upper edge sealing structure, the lower edge sealing structure, the left edge sealing structure and the right edge sealing structure are all 1 mm to 2 mm.

[0020] By adopting the above technical solution, the size distribution ratio of the braided body and the edge sealing is made more reasonable.

[0021] In a second aspect, the present application provides an artificial ligament weaving method, which is used for the aforementioned artificial weaving ligament, and adopts the following technical solution: An artificial ligament weaving method comprises the following steps: Providing a plurality of rectangular woven sheets of different sizes, and sewing two opposite sides of each rectangular woven sheet to form a single-layer woven tube; The single-layer braided tubes are sequentially sleeved from the inside to the outside, and when the single-layer braided tube of the outer layer is sleeved on the single-layer braided tube of the adjacent inner layer, the cylindrical single-layer braided tube of the inner layer is tied; Adjusting each of the single-layer braided tubes to form a cone at one end and a flat body at the other end; A plurality of braided fixing wires are used to pass through the top of the cone along its generatrix and then pass through the cylindrical part of each single-layer braided tube in a serpentine shape.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: On the one hand, a plurality of cylindrical single-layer braided tubes are sequentially sleeved to form a solid braided body, and the single-layer braided tubes can be increased or decreased according to the needs of different patients, thereby adjusting the diameter of the ligament. This eliminates the uncertainty caused by the doctor's own technique in cutting the ligament, and can meet the needs of different patients for ligaments of different diameters.

[0023] On the other hand, each single-layer braided tube in the braided body has not been cut, so the connection between the yarns can be maintained, and the yarns form a complete connection. When combined together, under stress, the braided ligaments are connected as a whole and are not prone to breakage, which can extend the service life of the braided ligament implanted in the human body and ensure the strength of the entire braided body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of an artificial braided ligament embodying the present application; Figure 2 It is a schematic diagram of the structure of a rectangular woven sheet embodying the present application; Figure 3 It is a schematic diagram of the structure of a cylindrical single-layer braided tube embodying the present application; Figure 4 is a cross-sectional view of a braided fixation wire and a titanium plate fixation wire embodying the present application; Figure 5 It is a front view of the braided fixing line embodying the present application.

[0025] Description of reference numerals: 1. Braided body; 2. Non-braided body; 21. Suture; 3. Braided fixing line; 31. Inclined portion; 321. Oblique body; 322. Comb tooth portion; 3221. Vertical portion; 3222. Horizontal portion; 32. Bending portion; 4. Rectangular braided sheet; 41. Upper edge sealing structure; 42. Lower edge sealing structure; 43. Left edge sealing structure; 44. Right edge sealing structure; 5. Suture; 6. Titanium plate fixing line; 61. Penetration portion; 62. Arc portion; 63. Exit portion; 10. Single-layer braided tube; 11. Conical body. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-Figure 5 This application is described in further detail.

[0027] The embodiment of the present application discloses an artificial braided ligament.

[0028] See also Figure 1 , Figure 2 and Figure 3An artificial braided ligament comprises: a non-woven body 2 and braided bodies 1 distributed at both ends of the non-woven body 2, and the two braided bodies 1 have the same structure. Each braided body 1 is composed of at least four cylindrical single-layer braided tubes 10 set to form a solid structure.

[0029] The non-woven body 2 includes a plurality of sutures 21, and a plurality of sutures 21 are evenly spaced and connected on the bottom circumference of every two opposing single-layer woven tubes 10 of the same diameter, so that the cross-sections of the plurality of sutures 21 are spliced ​​to form a plurality of circular rings, so that a multi-layer connecting ring is formed between the two woven bodies 1, and the overall connection strength is enhanced.

[0030] Each cylindrical single-layer braided tube 10 is rolled into a cylindrical shape by a rectangular braided sheet 4, and the rectangular braided sheet 4 includes an upper edge sealing structure 41, a lower edge sealing structure 42, a left edge sealing structure 43, and a right edge sealing structure 44. Any two opposite sides of each rectangular braided sheet 4 are overlapped and sutured. In this embodiment, the left edge sealing structure 43 and the right edge sealing structure 44 are overlapped and sutured together by suture lines 5, and the suture lines 5 are arranged in a cross pattern, but are not limited thereto. The widths of the upper edge sealing structure 41, the lower edge sealing structure 42, the left edge sealing structure 43, and the right edge sealing structure 44 are all between 1 mm and 2 mm.

[0031] Each cylindrical single-layer braided tube 10 in each braided body 1 becomes shorter and thicker from the inside to the outside, that is, the diameter of the single-layer braided tube 10 in the outer circle is greater than the diameter of the single-layer braided tube 10 in the inner circle adjacent to it, and the height of the single-layer braided tube 10 in the outer circle is less than the height of the single-layer braided tube 10 in the inner circle adjacent to it. When the ligament required by the patient is relatively thin, the number of cylindrical single-layer braided tubes 10 in the outer circle can be reduced to change the diameter of the artificial ligament. When the ligament required by the patient is relatively thick, the number of sleeved single-layer braided tubes 10 can be increased, thereby achieving the effect of adjusting the diameter of the braided body 1 according to the patient's needs.

[0032] Each single-layer braided tube 10 is flush on one side close to the non-braided body 2, and is combined to form a cone 11 on the other side. The cones 11 are formed at both ends of the entire artificial braided ligament, which can help the ligament graft to pass through the tibial tunnel and the femoral tunnel more easily, reduce the pressure and friction on the graft in the tunnel, thereby reducing surgical trauma and improving surgical accuracy.

[0033] The contact mode between any two adjacent layers in each single-layer braided tube 10 at the cone 11 can adopt a wedge-shaped contact mode, which can increase the compression degree between any two adjacent layers at the cone 11. Therefore, compared with the one-piece braided body 1, the present application can not only adapt to the needs of different patients for ligaments of different thicknesses, but also improve the overall ligament strength when the knee is bent when implanted in the body.

[0034] See also Figure 1 , Figure 4 and Figure 5 A plurality of braided fixing wires 3 are connected between each single-layer braided tube 10 to make the entire braided body 1 have a stronger connection. When subjected to force, there are transverse and radial connections between the entire ligaments, and the overall strength is guaranteed.

[0035] The braided fixing wire 3 includes an inclined portion 31 passing through the generatrix of the cone 11 and a serpentine bent portion 32 connecting the inclined portion 31. The inclined portion 31 passes through the upper edge sealing structure 41 of other single-layer braided tubes 10 in sequence along the generatrix of the cone 11 from the upper edge sealing structure 41 of the central single-layer braided tube 10 until the end of the inclined portion 31 is sewn to the outermost single-layer braided tube 10.

[0036] The bending portion 32 includes a bevel body 321 and a comb tooth portion 322. One end of the bevel body 321 is connected to the end of the inclined portion 31 sewn on the outermost single-layer braided tube 10, and the other end extends obliquely to the side wall of the outermost single-layer braided tube 10 away from the inclined portion 31. The bevel body 321 is inclined toward the side of the non-woven body 2, so that the side walls of each single-layer braided tube 10 are connected in the radial and transverse directions.

[0037] The comb teeth portion 322 includes a vertical portion 3221 and a horizontal portion 3222 connected to the oblique body 321, and the vertical portion 3221 and the horizontal portion 3222 are arranged alternately. There are multiple braiding fixing wires 3, and they are evenly spaced on the upper edge sealing structure 41 of the single-layer braided tube 10. The multiple braiding fixing wires 3 are arranged so that an annular connecting wire is formed on the upper edge sealing structure 41 of each single-layer braided tube 10, and different single-layer braided tubes 10 are connected together in the radial direction through a single braiding fixing wire 3. Staggered horizontal and vertical connections are formed inside the braided body 1, just like entangled multiple snakes with each other, so that the braided body 1 forms an entangled structure composed of countless connection nets, which has better connection strength and is stronger than the one-piece braided body 1.

[0038] The braid 1 at one end of the ligament is connected to the titanium plate fixed at the femoral end, and the braid 1 at the other end of the ligament is connected to the screw fixed at the tibia end. Two titanium plate fixing wires 6 are arranged in mirror image on the braid 1, and each titanium plate fixing wire 6 comprises a penetration portion 61 that penetrates radially along the braid 1, an arc portion 62 arranged along the outer wall of the braid 1, and an exit portion 63 that penetrates radially along the braid 1. The penetration portion 61 and the exit portion 63 are arranged at an angle between 40° and 50°, and the two ends of each titanium plate fixing wire 6 are fixed to the titanium plate.

[0039] The embodiment of the present application also discloses a weaving method for the above-mentioned artificial braided ligament.

[0040] See also Figure 1 , Figure 2 and Figure 3, an artificial ligament weaving method, comprising the following steps: Step S1: providing a plurality of rectangular woven sheets 4 of different sizes, and sewing two opposite sides of each rectangular woven sheet 4 to form a single-layer woven tube 10; Specifically, the rectangular woven sheet 4 is edge-sealed at the top, bottom, left and right sides to form an upper edge-sealed structure 41, a lower edge-sealed structure 42, a left edge-sealed structure 43 and a right edge-sealed structure 44. The left edge-sealed structure 43 and the right edge-sealed structure 44 are overlapped and sutured together along the length direction using cross-set suture lines 5.

[0041] The long sides of the rectangular woven sheet 4 of the single-layer woven tube 10 formed in the center serve as the left and right edge sealing structures, and the short sides serve as the upper and lower edge sealing structures. The length of the left and right edge sealing structures of the rectangular woven sheet 4 of the single-layer woven tube 10 forming the outer circle is shorter than the length of the left and right edge sealing structures of the single-layer woven tube 10 inside thereof, and the length of the upper and lower edge sealing structures of the rectangular woven sheet 4 of the single-layer woven tube 10 forming the outer circle is longer than the length of the upper and lower edge sealing structures of the single-layer woven tube 10 inside thereof.

[0042] See also Figure 3 , Figure 4 and Figure 5 Step S2: sequentially sleeve each single-layer braided tube 10 from the inside to the outside, and when the outer single-layer braided tube 10 is sleeved on the adjacent inner single-layer braided tube 10, the inner cylindrical single-layer braided tube 10 is tied; Specifically, the number of single-layer braided tubes 10 is greater than 4, and the number of single-layer braided tubes 10 can be increased or decreased according to the thickness of the ligament required by the patient. In this embodiment, the number of single-layer braided tubes 10 is set to 4, but it is not limited to this.

[0043] Use the binding wire to bind the single-layer braided tube 10 with a smaller diameter and a longer length, and then sequentially sleeve the single-layer braided tube 10 with a larger diameter and a shorter length on the outside. After the binding is completed, untie the binding wire.

[0044] In this way, the number of layers of the braided ligament can be gradually increased, and eventually a nearly solid braided ligament can be obtained. The structure of the solid braided ligament will be more stable and can better withstand tension and pressure.

[0045] Step S3: adjusting the position of each of the single-layer braided tubes 10 to form a cone 11 at one end and to be flush at the other end; Specifically, after the solid braided ligament is obtained, the positions of the single-layer braided tubes 10 are adjusted so that the top of the whole body forms a cone 11, and the bottom angle of the cone 11 ranges from 60° to 70°, so as to facilitate the implantation of the braided ligament.

[0046] Step S4: Use a plurality of braided fixing wires 3 to pass through the apex of the cone 11 along the generatrix of the cone 11 , and then pass through the radial and longitudinal directions of each single-layer braided tube 10 in a serpentine shape.

[0047] Use the braided fixing line 3 to start from the upper edge structure 41 of the most central cylindrical single-layer braided tube 10, and connect the upper edge structures 41 of each cylindrical single-layer braided tube 10 in sequence along the generatrix of the cone 11. After being connected to the upper edge structure 41 of the outermost single-layer braided tube 10, the braided fixing line 3 will pass through the axis to reach the vertical side wall of the outermost single-layer braided tube 10 to form a diagonal body 321. Then, it will move downward 6mm to 15mm and pass through the axis again to reach the other side of the outermost single-layer braided tube 10. Repeat this operation until the stitches of the lower edge structure 42 of the single-layer braided tube 10 are completed and the comb teeth 322 are formed. During the whole process, we need to operate 8 to 16 times along the circumferential direction to ensure that the braided fixing line 3 can be evenly distributed in various parts of the braided ligament.

[0048] "When connected to the upper edge sealing structure 41 of the outermost single-layer braided tube 10, the braiding fixing line 3 will pass through the axis to reach the vertical side wall of the outermost single-layer braided tube 10", wherein the braiding fixing line 3 will pass through the axis to reach the vertical side wall of the outermost single-layer braided tube 10 to form a slant body 321, and the slant body 321 is arranged to be inclined downward and has an angle of 96° with the downward moving vertical line (vertical part 3221).

[0049] “Move downward 6mm to 15mm, and pass through the axis again to reach the other side of the outermost single-layer braided tube 10”, wherein the line that passes through the axis again to reach the other side of the outermost single-layer braided tube 10 is arranged horizontally, and subsequent lines passing from one side of the single-layer braided tube 10 to the other side are all arranged horizontally, which is the horizontal portion 3222.

[0050] Step S5: two mirror-image titanium plate fixing wires 6 are arranged at one end of one of the braided bodies 1, and the titanium plate fixing wires 6 are connected to the titanium plate fixed at the femoral end; Specifically, a titanium plate fixing wire 6 is horizontally arranged at a position halfway down from the top of the conical body 11 of the braided body 1. Use a guide needle to pass the two ends of the titanium plate fixing wire 6 from the side wall of each cylindrical single-layer braided tube 10 toward the axis to form an entry portion 61 that penetrates radially along the braided body 1, an arc portion 62 that surrounds the outer wall of the braided body 1, and an exit portion 63 that passes through the braided body 1. The angle between the entry portion 61 and the exit portion 63 is between 40° and 50°. Then, the ends of the entry portion 61 and the exit portion 63 are passed out along the axis of the braided body 1. In order to ensure the fixing effect, two titanium plate fixing wires 6 are mirror-set in the circumferential direction of the braided body 1. This will make the fixation of the braided ligament more secure and better able to withstand the effects of various external forces.

[0051] Each single-layer braided tube 10 in the braided body 1 has not been cut, and can maintain the connection between the yarns, so that the yarns form a complete connection.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An artificial braided ligament, characterized in that: It comprises two braided bodies (1) and a non-braided body (2) located between the two braided bodies (1) and respectively connecting the two braided bodies; The braided body (1) comprises a plurality of cylindrical single-layer braided tubes (10) which are sequentially sleeved from the inside to the outside, and the ends of the plurality of single-layer braided tubes (10) facing away from the non-braided body (2) together form a cone (11); A plurality of braided fixing wires (3) are connected between each of the single-layer braided tubes (10).

2. An artificial braided ligament according to claim 1, characterized in that: There are at least four single-layer braided tubes (10), each of which is formed by curling a rectangular braided sheet (4), wherein the rectangular braided sheet (4) comprises an upper edge-sealing structure (41), a lower edge-sealing structure (42), a left edge-sealing structure (43) and a right edge-sealing structure (44), wherein the left edge-sealing structure (43) and the right edge-sealing structure (44) are connected by cross-arranged suture lines (5).

3. An artificial braided ligament according to claim 1, characterized in that: The braided fixing wire (3) comprises an inclined portion (31) passing through the generatrix of the cone (11) and a serpentine bending portion (32) connecting the inclined portion (31); The bent portion (32) is used to connect the side wall and the lower edge sealing structure (42) of each single-layer braided tube (10).

4. An artificial braided ligament according to claim 3, characterized in that: The bending portion (32) comprises an oblique body (321) and a comb tooth portion (322) having one end connected to the inclined portion (31) and the other end inclined toward the non-woven body (2).

5. The artificial braided ligament according to claim 1, characterized in that: The non-woven body (2) comprises a plurality of sutures (21), and the single-layer woven tubes (10) with the same diameter in the two woven bodies (1) are connected at even intervals by the plurality of sutures (21).

6. An artificial braided ligament according to claim 1, characterized in that: Two titanium plate fixing lines (6) are arranged in a mirror image on one of the braided bodies (1), each titanium plate fixing line (6) comprising a penetration portion (61) arranged along the radial direction of the braided body (1), an arc portion (62) arranged along the outer wall of the braided body (1), and an exit portion (63) arranged along the radial direction of the braided body (1), and the penetration portion (61) and the exit portion (63) are arranged at an angle.

7. An artificial braided ligament according to claim 2, characterized in that: The widths of the upper edge sealing structure (41), the lower edge sealing structure (42), the left edge sealing structure (43) and the right edge sealing structure (44) are all between 1 mm and 2 mm.

8. A method for weaving an artificial ligament, used for the artificial ligament according to any one of claims 2 to 7, characterized in that: Includes steps: Providing a plurality of rectangular woven sheets (4) of different sizes, and sewing two opposite side edges of each rectangular woven sheet (4) to form a single-layer woven tube (10); The single-layer braided tubes (10) are sequentially sleeved from the inside to the outside, and when the single-layer braided tube (10) of the outer layer is sleeved on the single-layer braided tube (10) of the adjacent inner layer, the cylindrical single-layer braided tube (10) of the inner layer is tied; Adjusting each of the single-layer braided tubes (10) to form a cone (11) at one end and to make the other end flush; A plurality of braided fixing wires (3) are used to pass through the apex of the cone (11) along its generatrix and then pass through the cylindrical portion of each single-layer braided tube (10) in a serpentine shape.

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