Method for fixing end of artificial ligament and artificial ligament

Abstract

The application discloses a fixing method for an end of an artificial ligament and the artificial ligament. The fixing method comprises steps S1 and S2. The step S1 comprises: installing a traction line on a braided part which is formed by rolling a woven cloth. The step S2 comprises: fixing the end of the braided part by using a winding line to form the end of the artificial ligament. When the end of the braided part is fixed by the winding line, the winding line winds around the end of the braided part, and a plurality of winding line coils are formed after winding. After the end of the braided part is fixed by the winding line, the two ends of the winding line pass through the gap between at least part of the winding line coils and the inner side of the braided part, so that the ends of the winding line are pressed on the braided part by the corresponding winding line coils, and the fixing of the ends of the winding line is realized; and when the two ends of the winding line are fixed on the braided part by the winding line coils, the two ends are not wound. The end of the artificial ligament is formed by the fixing method.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a method for fixing the end of an artificial ligament and the artificial ligament itself. Background Technology

[0002] With the increasing number of patients undergoing arthroscopic anterior cruciate ligament (ACL) reconstruction, the number of patients requiring ACL reconstruction and revision surgery due to various factors has also increased. Primary reconstruction mainly results in ACL failure, primarily manifesting as joint instability, and is also the main surgical indication for revision surgery. The LARS artificial ligament, as a graft, offers dual advantages in both ACL and posterior cruciate ligament reconstruction and repair. The LARS artificial ligament mainly consists of three parts: a traction suture, a braided portion, and a free fiber portion. For the fixation of the traction suture at the end of the LARS artificial ligament, a figure-eight wrapping method is used, and the ligament is wrapped with an end-pull suture method.

[0003] Currently, the LARS method for fixing the traction suture at the end of the artificial ligament uses a figure-eight wrapping method. This creates a double loop on the outer edge of the ligament, resulting in a wider area with a larger diameter. Clinical feedback indicates that this wider area causes greater friction from the bone tunnel during implantation, which can cause difficulties for clinicians or even necessitate re-drilling the bone tunnel.

[0004] In the LARS method of fixing the end of the artificial ligament with a wrapping thread, the ordinary rope end wrapping thread fixing method is used. This method will form a thread elbow when the wrapping thread ends, causing the wrapping surface to be rough and uneven, increasing the friction with the bone tunnel. On the other hand, when the thread end is pulled back, it will shrink and deform, resulting in an uneven end, which will lead to unraveling. Summary of the Invention

[0005] The purpose of this invention is to provide a method for fixing the end of an artificial ligament and an artificial ligament, so as to solve the problem of ligament elbows forming when artificial ligaments are fixed by winding with a suture in the prior art.

[0006] The technical solution of this invention is as follows: A method for fixing the end of an artificial ligament, comprising: S1: Install the traction line on the braided section made of woven fabric; S2: The end of the braided part is bound and fixed with the winding thread to form the end of the artificial ligament; When the winding thread is used to bind and fix the end of the braided part, the winding thread will be wound around the end of the braided part, forming a number of winding thread loops after winding. After the winding thread binds and fixes the end of the braided part, both ends of the winding thread will pass through the gap between at least part of the winding thread coil and the braided part inside it, so that the end of the winding thread will be pressed against the braided part by the corresponding winding thread coil, thereby fixing the end of the winding thread; and, when the two ends of the winding thread are pressed and fixed on the braided part by the winding thread coil, the two do not become entangled.

[0007] In a preferred embodiment of the method for fixing the end of an artificial ligament, step S1 includes: S11: The two ends of the traction wire pass through the back of the fabric and then extend from the front of the fabric. The two ends of the traction wire are positioned towards the end of the braiding part so that both ends of the traction wire extend out of the end of the fabric. S12: Roll the two sides of the fabric in the width direction toward the middle to form two rolls of fabric; S13: Includes sewing the fabric and fixing the traction thread; The sewn fabric includes: the bottoms of the two rolls of fabric are connected by the fabric itself, the two rolls of fabric are pressed close to each other and the tops of the two rolls of fabric are sewn together to form a roll; wherein, the side opposite to the bottom is the top; The fixed traction line includes: a traction line loop left on the back of the woven fabric, which passes through the rolled woven fabric and comes to the top side of the rolled woven fabric. Then the traction line loop is twisted and then looped through the rolled woven fabric. Pulling the two ends of the traction line makes the traction line loop tightly looped on the rolled woven fabric. Wherein, after the two rolls of fabric are pressed close to each other and sewn together into one roll, the two holes on the fabric for the traction line to pass through are located on the outermost layer of fabric and at the top of the fabric that is sewn together into one roll.

[0008] In a preferred embodiment of the method for fixing the end of an artificial ligament, before the fabric is rolled up, the distance between the two holes on the fabric for the traction thread to pass through in the width direction of the fabric is 1 / 10 to 1 / 5 of the width of the fabric at that location.

[0009] In a preferred embodiment of the method for fixing the end of an artificial ligament, step S13 includes: Two rolls of fabric are pressed together to form a roll, and then sewn together towards the end of the braided section. The sewing stops when the fabric is a certain distance from the hole on the fabric through which the traction thread passes. The traction thread loop on the back of the fabric is passed through the rolled fabric to the top side of the rolled fabric, and then the traction thread loop is twisted and then looped through the rolled fabric. The remaining sewing is then completed, except that the fabric portion corresponding to the end of the braided section is not sewn. Finally, the two ends of the traction thread are pulled to tighten the traction thread loop onto the rolled fabric.

[0010] In a preferred embodiment of the method for fixing the end of an artificial ligament, step S1 includes: S11': Roll the two sides of the fabric in the width direction toward the middle to form two rolls of fabric; S12': The traction line is wound around the two rolls of fabric. After winding, the middle part of the traction line is placed horizontally at the top of the two rolls of fabric, and the two ends of the traction line extend to the bottom of the two rolls of fabric and then wrap back to the top of the two rolls of fabric. S13': Insert a traction needle, which is fixed at one end of the traction line, into one roll of fabric. After passing through several layers of fabric, the traction needle moves toward the end of the fabric until it brings the traction line fixed to it out of the end of the fabric. Insert another traction needle, which is fixed at the other end of the traction line, into another roll of fabric. After passing through several layers of fabric, the other traction needle moves toward the end of the fabric until it brings the traction line fixed to it out of the end of the fabric. S14': The bottoms of the two rolls of fabric are connected by the fabric itself, the two rolls of fabric are pressed close to each other and the tops of the two rolls of fabric are sewn together to form a roll; S15': Pull both ends of the traction line to tighten the traction line onto the fabric that has been sewn into a roll; Wherein, the two ends of the traction line cross each other when extending to the bottom of the two rolls of fabric and then wrap back to the top of the two rolls of fabric, without crossing each other after wrapping back to the top of the two rolls of fabric; the two traction needles, which are respectively fixedly connected to the two ends of the traction line, are respectively fixedly connected to the corresponding end of the traction line before S13'.

[0011] In a preferred embodiment of the method for fixing the end of an artificial ligament, the direction opposite to the end direction of the braided portion along the axial direction of the braided portion is the middle direction of the braided portion; the winding thread is divided into three segments, namely the first end of the winding thread, the middle of the winding thread, and the second end of the winding thread; step S2 includes: S21: Place the winding thread at the end of the braided part; the placement method is such that the first end of the winding thread extends towards the end of the braided part, the winding thread wraps around the middle part once, and the second end of the winding thread extends towards the middle of the braided part. S22: The middle part of the winding thread is used to wrap around and bind the end of the braided part. When wrapping, the middle part of the winding thread starts to wrap from the part near the second end of the winding thread, and the end of the braided part starts to wrap from the outermost end towards the middle of the braided part. S23: After the end of the braided part is fully wrapped around the middle of the winding thread, the first end of the winding thread is pulled to bind and tighten the winding thread at the end of the braided part.

[0012] In a preferred embodiment of the method for fixing the end of an artificial ligament, the direction opposite to the end direction of the braided portion along the axial direction of the braided portion is the middle direction of the braided portion; step S2 includes: S21': The winding thread is knotted and tightened at the outermost end of the braided part. The winding thread is divided into two segments from the knotted point, namely the first segment and the second segment. The first segment of the winding thread is placed on the braided part in a manner that extends toward the middle of the braided part. S22': The second segment of the winding thread is used to wrap around and bind the end of the braided part. When wrapping, the second segment of the winding thread starts to wrap from the part near the knot of the winding thread, and wraps around the end of the braided part from the outermost end toward the middle of the braided part. When the second segment of the winding thread wraps around the end of the braided part, part of the auxiliary thread will be placed on the end of the braided part and wrapped in together. After the wrapping is completed, both ends of the auxiliary thread are not covered by the winding thread loop and both extend toward the end of the braided part. In the middle direction of the braided part, part of the auxiliary thread is not covered by the winding thread loop and the uncovered part forms an auxiliary thread bend. S23': After the second segment of the winding thread is finished, it passes through the auxiliary cord bend, and then the two ends of the auxiliary line are pulled to pass the second segment of the winding thread through the gap between the winding thread coil and the braided part through the auxiliary cord bend, and then the covered part of the winding thread coil is pulled out. S24': Pull the second segment of the winding thread away from the knot from one end of the second segment of the winding thread, and tighten it so that the second segment of the winding thread is bound and tightened at the end of the braid.

[0013] In a preferred embodiment of the method for fixing the end of an artificial ligament, step S22' includes: S221': The second segment of the winding thread starts to wrap around the outermost end of the braided part, and stops wrapping after a certain distance; S222': The auxiliary line is placed on the end of the braiding part, and the placement method is such that the middle part of the auxiliary line is located on one side of the middle part of the end of the braiding part, and the middle part of the auxiliary line is bent to form the auxiliary line rope bend. Both ends of the auxiliary line extend towards the end of the braiding part and extend to the winding coil area at this time or pass through and extend out of the winding coil area at this time. S223': The winding line continues to loop until the end of the braided part is fully wrapped. At this time, the auxiliary line on the braided part is also wound in during the looping.

[0014] In a preferred embodiment of the method for fixing the end of an artificial ligament, the length of the auxiliary line together with the end of the braided portion wrapped by the winding line along the axial direction of the braided portion is 1 / 3 to 2 / 3 of the length of the end of the braided portion.

[0015] An artificial ligament, the end of which is made by a method for fixing the end of an artificial ligament as described in any one of the preceding claims.

[0016] Because of the above technical solutions, this invention has the following advantages and positive effects compared with the prior art: The present invention provides a method for fixing the end of an artificial ligament and an artificial ligament. The method employs a binding and fixing method of the winding thread to the end of the braided portion. After binding, both ends of the winding thread pass through at least a portion of the gap between the winding thread loop and the corresponding braided portion, thus pressing the two ends of the winding thread tightly against the braided portion by the winding thread loop, preventing the winding thread from unraveling at the end of the braided portion. Simultaneously, because the two ends of the winding thread do not entangle when pressed and fixed to the end of the braided portion by the winding thread loop, no thread elbows are formed, the winding surface is smooth and flowing, and friction with the bone tunnel is minimal. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention.

[0018] Figure 1 This is a schematic diagram of the end of an artificial ligament in the prior art; Figure 2 This is a schematic diagram of the structure of an artificial ligament according to the present invention; Figures 3 to 7 This is a schematic diagram of the traction wire installation process in an artificial ligament in Example 1 (corresponding to step S1). Figures 8 to 11 This is a schematic diagram of the process of fixing the end of the braided part in an artificial ligament in Example 1 (corresponding to step S2). Figures 12 to 15 This is a schematic diagram of the process of fixing the end of the braided part in an artificial ligament in Example 2 (corresponding to step S2). Figures 16 to 18 This is a schematic diagram of the traction wire installation process in an artificial ligament in Example 3 (corresponding to step S1).

[0019] Explanation of reference numerals in the attached figures: 1: Free silk section; 2: Weaving section; 21: Fabric weaving; 22: End of the weaving section; 23: Seam; 3: Tow line; 31: Tow line loop; 4: Wrapping thread; 41: First end of the wrapping thread; 42: Middle part of the wrapping thread; 43: Second end of the wrapping thread; 44: First segment of the wrapping thread; 45: Second segment of the wrapping thread; 5: Auxiliary line; 51: Auxiliary line rope bend; A: Elbow. Detailed Implementation

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0021] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0022] like Figure 2As shown, an artificial ligament generally includes a free thread section 1, braided sections 2 located at both ends of the free thread section 1, traction threads 3, and auxiliary threads 5. The free thread section 1 comprises several free threads arranged side-by-side at intervals, with both ends of each free thread connected to fabric 21 in the braided sections 2 at both ends. Of the two ends of the braided section 2, the end furthest from the free thread section 1 is the end portion 22 of the braided section, and the other end (that is, the end connected to the free thread section 1) is referred to as the middle portion of the braided section 2 for ease of description below. The braided section 2 is mainly formed by rolling the fabric 21, and then the end portion 22 of the braided section is fixed by winding threads 4. The portion of the braided section 2, except for its end portion, is fixed by sewing. The traction threads 3 are fixed to the end portion 22 of the braided section.

[0023] See Figures 3 to 12 This embodiment provides a method for fixing the end of an artificial ligament and an artificial ligament, wherein the end of the artificial ligament is made using the method for fixing the end of the artificial ligament.

[0024] The method for fixing the end of the artificial ligament includes: S1: Install the traction line 3 onto the braided section 2 made of woven fabric 21; S2: Use the winding thread 4 to bind and fix the end 22 of the braided part to form the end of the artificial ligament; When the end 22 of the braided part is bound and fixed with the winding thread 4, the winding thread 4 will be wound around the end 22 of the braided part, forming a number of winding thread loops after winding. After the winding thread 4 binds and fixes the end 22 of the braided part, both ends of the winding thread 4 will pass through the gap between at least part of the winding thread coil and the end 22 of the braided part inside it, so that the end of the winding thread 4 will be pressed against the end 22 of the braided part by the corresponding winding thread coil, thereby fixing the end of the winding thread 4; and, when the two ends of the winding thread 4 are pressed and fixed against the end 22 of the braided part by the winding thread coil, the two do not become entangled.

[0025] In the prior art, the fixing of the two ends of the winding thread 4 is generally as follows: one end (referred to as the fixed end for ease of description) is placed on the end 22 of the braided part from the beginning of the winding of the winding thread 4 and is wound together with the end 22 of the braided part, thereby being pressed and fixed to the end 22 of the braided part by the winding thread coil. The other end (referred to as the winding end for ease of description) is wound around the fixed end and then pressed between the already wound winding thread coil and the end 22 of the braided part by some method, and is pressed and fixed to the end 22 of the braided part by the winding thread coil. The winding end and the fixed end are pressed between the winding thread coil and the end 22 of the braided part in the form of winding, which forms a thread elbow A (e.g., Figure 1As shown), this means that the smooth and flowing winding surface formed by the original many winding coils laid flat on the end 22 of the braided part will form abrupt protrusions at the winding end and the fixed end.

[0026] The artificial ligament formed using the fixation method for the end of the artificial ligament provided in this embodiment has an end that, after being bound and fixed by the winding thread 4, both ends of the winding thread 4 pass through the gap between at least a portion of the winding thread loop and the corresponding end 22 of the braided part. This allows the two ends of the winding thread 4 to be pressed tightly onto the end 22 of the braided part by the winding thread loop, preventing the winding thread 4 from unraveling at the end 22 of the braided part. Simultaneously, since the two ends of the winding thread 4 do not entangle when pressed and fixed onto the end 22 of the braided part by the winding thread loop, no thread elbow A is generated, the winding surface is smooth and flowing, and friction with the bone tunnel is minimal.

[0027] The fixation method of the artificial ligament end in this embodiment will be further described below.

[0028] Step S1 (installing the traction line 3 on the braided section 2 made of woven fabric 21) mainly includes four steps, namely S11, S12 and S13.

[0029] S11: The two ends of the traction thread 3 pass through the back of the woven fabric 21 and then extend from the front of the woven fabric 21. The two ends of the traction thread 3 are positioned towards the end 22 of the braiding section so that both ends of the traction thread 3 extend beyond the end of the woven fabric 21. Figure 3 As shown.

[0030] Specifically, the distance between the hole on the fabric 21 through which the traction thread 3 passes and the outermost end of the fabric 21 (the end of the fabric 21, which is the part that forms the braided section 22 after winding) is preferably 40 to 60 mm, and can be selected according to the different specifications of the ligament; before the fabric 21 is wound, the two holes on the fabric 21 through which the traction thread 3 passes are designed in the center of the fabric 21 and need to be spaced apart. Preferably, the distance between the two holes on the fabric 21 through which the traction thread 3 passes in the width direction of the fabric 21 is 1 / 10 to 1 / 5 of the width of the fabric 21 at that point, and can be selected according to the different specifications of the ligament.

[0031] Among them, the traction line 3 can be braided line, stranded line, monofilament, etc.

[0032] S12: Roll the two sides of the fabric 21 in the width direction toward the middle to form two rolls of fabric 21.

[0033] S13: Includes sewing fabric 21 and fixing traction line 3.

[0034] The sewn fabric 21 includes: the bottoms of two rolls of fabric 21 are connected by the fabric 21 itself, the two rolls of fabric 21 are pressed close to each other and the tops of the two rolls of fabric 21 are sewn together to form a roll; wherein, the side opposite to the bottom is the top. The seam 23 formed when the two rolls of fabric 21 are sewn together is located at the top.

[0035] The fixed traction line 3 includes: a traction line loop 31 extending from the back of the woven fabric 21 (e.g., ...). Figure 4 As shown), after passing through the rolled-up fabric 21, it reaches the top side of the rolled-up fabric 21 (as shown). Figure 5 (as shown), then twist the traction rope loop 31 and then loop it over the rolled-up fabric 21 (as shown). Figure 6 As shown), pulling the two ends of the traction line 3 causes the traction line loop 31 to be tightly fitted onto the rolled-up fabric 21 (as shown). Figure 7 (As shown).

[0036] In this process, after the two rolls of fabric 21 are pressed together and sewn into one roll, the two holes on the fabric 21 for the guide thread 3 to pass through are located on the outermost layer of fabric 21 and at the top of the sewn roll of fabric 21, that is, as shown in the figure. Figure 4 As shown in the diagram. Thus, except for a small portion, the traction suture 3 has only a single loop on the braided portion 2. Compared to the double loops in the prior art, the area on the artificial ligament formed by the traction suture 3 with a larger diameter is narrower, resulting in less friction from the bone tunnel during implantation. Furthermore, the inventors discovered that when the traction suture 3 breaks under tensile force, the breakage point is at the ends 22 extending out of the braided portion. Therefore, this embodiment changes from a double loop to a single loop, solving the problem of a wider area with a larger diameter while maintaining the same force value used in clinical operations.

[0037] In step S23, a more specific step may be: pressing two rolls of fabric 21 close together to form a roll shape, and then sewing them together, sewing towards the end 22 of the braided part, stopping when the sewing reaches a certain distance from the hole on the fabric 21 through which the guide thread 3 passes; passing the guide thread loop 31 on the back of the fabric 21 through the rolled fabric 21 to the top side of the rolled fabric 21, then twisting the guide thread loop 31 and then looping it over the rolled fabric 21; continuing to complete the remaining sewing, wherein the portion of the fabric 21 corresponding to the end 22 of the braided part is not sewn; finally, pulling the two ends of the guide thread 3 so that the guide thread loop 31 is tightly wrapped around the rolled fabric 21. When pulling the two ends of the guide thread 3, the ends of the two ends of the guide thread 3 can be aligned first and then a pulling force can be applied to the ends of the two ends of the guide thread 3 simultaneously, so that the length of the outermost ends of the two ends of the guide thread 3 extending out of the end 22 of the braided part is as consistent as possible.

[0038] Step S2 (binding and fixing the end 22 of the braided part with the winding thread 4 to form the end of the artificial ligament) mainly includes four steps, namely S21, S22, S23 and S24. For ease of description, the direction opposite to the direction of the end 22 of the braided part along the axial direction of the braided part 2 is the direction of the middle part of the braided part 2; the winding thread 4 is divided into three segments, namely the first end 41 of the winding thread, the middle part 42 of the winding thread and the second end 43 of the winding thread.

[0039] S21: Place the winding thread 4 at the end 22 of the braiding section; the placement is such that the first end 41 of the winding thread extends towards the end 22 of the braiding section, the middle part 42 of the winding thread wraps around once, and the second end 43 of the winding thread extends towards the middle of the braiding section 2, as shown. Figure 8 As shown. That is, the winding thread 4 is laid flat on the end 22 of the braiding part, so that the two ends face different directions.

[0040] S22: The middle part 42 of the winding thread is used to wrap around and bind the end 22 of the braided part, such as... Figure 9 and Figure 10 As shown; when winding, the middle part 42 of the winding thread starts to wind from the part near the second end 43 of the winding thread, and the end 22 of the braid starts to wind from the outermost end towards the middle of the braid 2.

[0041] S23: After fully wrapping the end 22 of the braided portion around the middle 42 of the winding thread (as shown in the image) Figure 10 As shown), pulling the first end 41 of the winding line causes the winding line 4 to be bound and tightened at the end 22 of the braided part.

[0042] S24; Cut off the portions of the winding wire 4 that are not covered by the winding wire coil, such as... Figure 11 As shown.

[0043] Preferably, when the winding thread 4 is wrapped around the end 22 of the braided part, it ends at a position 15 to 25 mm away from the outermost end of the end 22 of the braided part (the specific distance can be selected according to the different specifications of the ligament), that is, the middle part 42 of the winding thread completely wraps around the end 22 of the braided part; and the middle part 42 of the winding thread makes the formed winding thread loops as parallel and tight as possible during the winding process, and the first end 41 and the second end 43 of the winding thread, which are pressed against the end 22 of the braided part by the winding thread loops, are parallel and close together.

[0044] See Figures 3 to 7 , Figures 12 to 15 This embodiment provides a method for fixing the end of an artificial ligament and an artificial ligament, wherein the end of the artificial ligament is made using the method for fixing the end of the artificial ligament.

[0045] The method for fixing the end of the artificial ligament includes: S1: Install the traction line 3 onto the braided section 2 made of woven fabric 21; S2: Use the winding thread 4 to bind and fix the end 22 of the braided part to form the end of the artificial ligament; When the end 22 of the braided part is bound and fixed with the winding thread 4, the winding thread 4 will be wound around the end 22 of the braided part, forming a number of winding thread loops after winding. After the winding thread 4 binds and fixes the end 22 of the braided part, both ends of the winding thread 4 will pass through the gap between at least part of the winding thread coil and the end 22 of the braided part inside it, so that the end of the winding thread 4 will be pressed against the end 22 of the braided part by the corresponding winding thread coil, thereby fixing the end of the winding thread 4; and, when the two ends of the winding thread 4 are pressed and fixed against the end 22 of the braided part by the winding thread coil, the two do not become entangled.

[0046] In the prior art, the two ends of the winding thread 4 are generally fixed in the following way: one end (referred to as the fixed end for ease of description) is placed on the end 22 of the braiding part from the beginning of the winding of the winding thread 4 and is wound together with the end 22 of the braiding part, so as to be pressed and fixed on the end 22 of the braiding part by the winding thread coil. The other end (referred to as the winding end for ease of description) is wound with the fixed end and then pressed between the already wound winding thread coil and the end 22 of the braiding part by some method, and is pressed and fixed on the end 22 of the braiding part by the winding thread coil. The winding end and the fixed end are pressed between the winding thread coil and the end 22 of the braiding part in the form of winding and forming an elbow A. That is, the smooth and smooth winding surface formed by the original many winding thread coils laid flat on the end 22 of the braiding part will form an abrupt protrusion at the winding end and the fixed end.

[0047] The artificial ligament formed using the fixation method for the end of the artificial ligament provided in this embodiment has an end that, after being bound and fixed by the winding thread 4, both ends of the winding thread 4 pass through the gap between at least a portion of the winding thread loop and the corresponding end 22 of the braided part. This allows the two ends of the winding thread 4 to be pressed tightly onto the end 22 of the braided part by the winding thread loop, preventing the winding thread 4 from unraveling at the end 22 of the braided part. Simultaneously, since the two ends of the winding thread 4 do not entangle when pressed and fixed onto the end 22 of the braided part by the winding thread loop, no thread elbow A is generated, the winding surface is smooth and flowing, and friction with the bone tunnel is minimal.

[0048] The fixation method of the artificial ligament end in this embodiment will be further described below.

[0049] Step S1 (installing the traction line 3 on the braided section 2 made of woven fabric 21) mainly includes four steps, namely S11, S12 and S13.

[0050] S11: The two ends of the traction thread 3 pass through the back of the woven fabric 21 and then extend from the front of the woven fabric 21. The two ends of the traction thread 3 are positioned towards the end 22 of the braiding section so that both ends of the traction thread 3 extend beyond the end of the woven fabric 21. Figure 3 As shown.

[0051] Specifically, the distance between the hole on the fabric 21 through which the traction thread 3 passes and the outermost end of the fabric 21 (the end of the fabric 21, which is the part that forms the braided section 22 after winding) is preferably 40 to 60 mm, and can be selected according to the different specifications of the ligament; before the fabric 21 is wound, the two holes on the fabric 21 through which the traction thread 3 passes are designed in the center of the fabric 21 and need to be spaced apart. Preferably, the distance between the two holes on the fabric 21 through which the traction thread 3 passes in the width direction of the fabric 21 is 1 / 10 to 1 / 5 of the width of the fabric 21 at that point, and can be selected according to the different specifications of the ligament.

[0052] Among them, the traction line 3 can be braided line, stranded line, monofilament, etc.

[0053] S12: Roll the two sides of the fabric 21 in the width direction toward the middle to form two rolls of fabric 21.

[0054] S13: Includes sewing fabric 21 and fixing traction line 3.

[0055] The sewn fabric 21 includes: the bottoms of two rolls of fabric 21 are connected by the fabric 21 itself, the two rolls of fabric 21 are pressed close to each other and the tops of the two rolls of fabric 21 are sewn together to form a roll; wherein, the side opposite to the bottom is the top. The seam 23 formed when the two rolls of fabric 21 are sewn together is located at the top.

[0056] The fixed traction line 3 includes: a traction line loop 31 extending from the back of the woven fabric 21 (e.g., ...). Figure 4 As shown), after passing through the rolled-up fabric 21, it reaches the top side of the rolled-up fabric 21 (as shown). Figure 5 (as shown), then twist the traction rope loop 31 and then loop it over the rolled-up fabric 21 (as shown). Figure 6 As shown), pulling the two ends of the traction line 3 causes the traction line loop 31 to be tightly fitted onto the rolled-up fabric 21 (as shown). Figure 7 (As shown).

[0057] In this process, after the two rolls of fabric 21 are pressed together and sewn into one roll, the two holes on the fabric 21 for the guide thread 3 to pass through are located on the outermost layer of fabric 21 and at the top of the sewn roll of fabric 21, that is, as shown in the figure. Figure 4As shown in the diagram. Thus, except for a small portion, the traction suture 3 has only a single loop on the braided portion 2. Compared to the double loops in the prior art, the area on the artificial ligament formed by the traction suture 3 with a larger diameter is narrower, resulting in less friction from the bone tunnel during implantation. Furthermore, the inventors discovered that when the traction suture 3 breaks under tensile force, the breakage point is at the ends 22 extending out of the braided portion. Therefore, this embodiment changes from a double loop to a single loop, solving the problem of a wider area with a larger diameter while maintaining the same force value used in clinical operations.

[0058] In step S23, a more specific step may be: pressing two rolls of fabric 21 close together to form a roll shape, and then sewing them together, sewing towards the end 22 of the braided part, stopping when the sewing reaches a certain distance from the hole on the fabric 21 through which the guide thread 3 passes; passing the guide thread loop 31 on the back of the fabric 21 through the rolled fabric 21 to the top side of the rolled fabric 21, then twisting the guide thread loop 31 and then looping it over the rolled fabric 21; continuing to complete the remaining sewing, wherein the portion of the fabric 21 corresponding to the end 22 of the braided part is not sewn; finally, pulling the two ends of the guide thread 3 so that the guide thread loop 31 is tightly wrapped around the rolled fabric 21. When pulling the two ends of the guide thread 3, the ends of the two ends of the guide thread 3 can be aligned first and then a pulling force can be applied to the ends of the two ends of the guide thread 3 simultaneously, so that the length of the outermost ends of the two ends of the guide thread 3 extending out of the end 22 of the braided part is as consistent as possible.

[0059] Step S2 (binding and fixing the end 22 of the braided portion with the winding thread 4 to form the end of the artificial ligament) mainly includes four steps, namely S21', S22', S23' and S24'. For ease of description, the direction opposite to the direction of the end 22 of the braided portion along the axial direction of the braided portion 2 is the direction of the middle part of the braided portion 2.

[0060] S21': Tie a knot at the outermost end of the braided section 22 using the winding thread 4. The winding thread 4 is divided into two sections from the knot, namely the first section and the second section. The first section 44 of the winding thread is placed on the braided section 2 in a manner that extends towards the middle of the braided section 2, as shown. Figure 12 As shown.

[0061] S22': The second segment 45 of the winding thread is used to wrap around and bind the end 22 of the braided part. When wrapping, the second segment 45 of the winding thread starts to wrap from the part near the knot of the winding thread 4, and wraps around the end 22 of the braided part from the outermost end towards the middle of the braided part 2. When the second segment 45 of the winding thread wraps around the end 22 of the braided part, part of the auxiliary thread 5 will be placed on the end 22 of the braided part and wrapped in together. After the wrapping is completed, both ends of the auxiliary thread 5 are not covered by the winding thread loop and both extend towards the end 22 of the braided part. Part of the auxiliary thread 5 in the middle direction of the braided part 2 is not covered by the winding thread loop and the uncovered part forms the auxiliary thread rope bend 51.

[0062] Specifically, S22' may include S221', S222' and S223'.

[0063] S221': The second segment 45 of the winding thread starts to wrap around the outermost end of the end 22 of the braided part, and stops wrapping after a certain distance. In this embodiment, it is preferable to stop wrapping when the winding thread 4 has wrapped halfway, that is, when it stops, it is located at the center of the end 22 of the braided part in the axial direction.

[0064] S222': The auxiliary line 5 is placed on the end 22 of the braiding part, with the middle of the auxiliary line 5 located on one side of the middle of the end of the braiding part 2. The middle of the auxiliary line 5 is bent to form an auxiliary line rope bend 51. Both ends of the auxiliary line 5 extend towards the end 22 of the braiding part and extend to or through and out of the current winding coil area. In this embodiment, preferably, both ends of the auxiliary line 5 extend towards the end 22 of the braiding part and pass through and out of the current winding coil area, such as... Figure 13 As shown.

[0065] S223': Continue to wrap the winding line 4 until the end 22 of the braided part is fully wrapped. At this time, the auxiliary line 5 on the end 22 of the braided part is also wrapped in when wrapping.

[0066] Preferably, along the axial direction of the braided portion 2, the length of the auxiliary line 5 wrapped around the end 22 of the braided portion is 1 / 3 to 2 / 3 of the length of the end 22 of the braided portion, and more preferably one-half in this embodiment.

[0067] S23': The second section 45 of the winding line passes through the auxiliary line bend 51 after the loop is completed (as shown in the example). Figure 14 (As shown), then pull both ends of the auxiliary line 5, and through the auxiliary line rope bend 51, pass the second section 45 of the winding line through the gap between the winding line coil and the end 22 of the braided part, and then pull out the covered part of the winding line coil.

[0068] S24': Pull the second section 45 of the winding thread away from the knot from one end of the second section 45. Tighten the second section 45 so that it is bound tightly to the end 22 of the braided section. Finally, cut off the portions of the winding thread 4 that are not covered by the winding thread loops. Figure 15 As shown. Of the two ends of the second segment 45 of the winding thread, one end is the end that is knotted on the end 22 of the braided part in conjunction with the first segment 44 of the winding thread, and the other end is the end away from the knot.

[0069] This embodiment provides a method for fixing the end of an artificial ligament and an artificial ligament, wherein the end of the artificial ligament is made using the method for fixing the end of the artificial ligament. The method for fixing the end of the artificial ligament provided in this embodiment is based on Embodiment 1 or Embodiment 2, but differs from Embodiment 1 or Embodiment 2 in that step S1 (installing the traction line 3 on the braided part 2 made of woven fabric 21) is different.

[0070] In this embodiment, step S1 (installing the traction line 3 on the braided part 2 made of woven fabric 21) mainly includes five steps, namely S11', S12', S13', S14' and S15'.

[0071] S11': Roll the two sides of the fabric 21 in the width direction toward the middle to form two rolls of fabric 21, as follows: Figure 16 As shown.

[0072] S12': The traction line 3 is wound around the two rolls of fabric 21. After winding, the traction line 3 is placed horizontally at the top of the two rolls of fabric 21, and the two ends of the traction line 3 extend to the bottom of the two rolls of fabric 21 and then wrap back to the top of the two rolls of fabric 21.

[0073] S13': A traction needle, fixed at one end of the traction thread 3, is inserted into one roll of fabric 21. The traction needle passes through several layers of fabric 21 and moves towards the end of the fabric 21 until it brings the traction thread 3, to which it is fixed, out of the end of the fabric 21. Another traction needle, fixed at the other end of the traction thread 3, is inserted into another roll of fabric 21. This other traction needle passes through several layers of fabric 21 and moves towards the end of the fabric 21 until it brings the traction thread 3, to which it is fixed, out of the end of the fabric. Figure 17 As shown.

[0074] S14': The bottoms of the two rolls of fabric 21 are connected by the fabric 21 itself. The two rolls of fabric 21 are pressed close to each other and the tops of the two rolls of fabric 21 are sewn together to form a roll. S15': Pull both ends of the traction thread 3 to tighten the traction thread 3 onto the rolled fabric 21 formed after sewing, as shown. Figure 18 As shown.

[0075] In this configuration, the two ends of the traction line 3 cross each other as they extend from the bottom of the two rolls of fabric 21, and then wrap back to the top of the two rolls of fabric 21. After wrapping back to the top of the two rolls of fabric 21, they do not cross each other. See [link to documentation] for details. Figure 17 As for the two traction pins that are fixedly connected to the two ends of the traction line 3, the timing of their connection to the corresponding end of the traction line 33 is as long as it is before step S13'.

[0076] Preferably, after the fabric 21 is sewn into a roll, the outermost layer of fabric has two holes formed by two traction needles. The distance between these two holes in the width direction of the fabric 21 is 1 / 10 to 1 / 5 of the width of the fabric 21 at that location, which can be selected according to the different specifications of the ligament.

[0077] The traction thread 3 is fixed to the braided section 2 using the method shown in this embodiment. After the traction thread 3 is tightened, both ends pass through the multi-layered fabric 21 and then emerge from the end of the fabric 21. Therefore, when the traction thread 3 is stretched, the part of the fabric 21 with holes for the traction thread 3 to pass through (that is, holes formed by the insertion of traction needles) is less likely to tear due to the pulling of the traction thread 3, and the traction thread 3 is also less likely to loosen or come off from the braided section 2.

[0078] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A method for fixing the end of an artificial ligament, characterized in that, include: S1: Install the traction line on the braided section made of woven fabric; S2: The end of the braided part is bound and fixed with the winding thread to form the end of the artificial ligament; When the winding thread is used to bind and fix the end of the braided part, the winding thread will be wound around the end of the braided part, forming a number of winding thread loops after winding. After the winding thread binds and fixes the end of the braided part, both ends of the winding thread will pass through the gap between at least part of the winding thread coil and the braided part inside it, so that the end of the winding thread will be pressed against the braided part by the corresponding winding thread coil, thereby fixing the end of the winding thread; and, when the two ends of the winding thread are pressed and fixed on the braided part by the winding thread coil, the two do not become entangled.

2. The method for fixing the end of an artificial ligament according to claim 1, characterized in that, S1 includes: S11: The two ends of the traction wire pass through the back of the fabric and then extend from the front of the fabric. The two ends of the traction wire are positioned towards the end of the braiding part so that both ends of the traction wire extend out of the end of the fabric. S12: Roll the two sides of the fabric in the width direction toward the middle to form two rolls of fabric; S13: Includes sewing the fabric and fixing the traction thread; The sewn fabric includes: the bottoms of the two rolls of fabric are connected by the fabric itself, the two rolls of fabric are pressed close to each other and the tops of the two rolls of fabric are sewn together to form a roll; wherein, the side opposite to the bottom is the top; The fixed traction line includes: a traction line loop left on the back of the woven fabric, which passes through the rolled woven fabric and comes to the top side of the rolled woven fabric. Then the traction line loop is twisted and then looped through the rolled woven fabric. Pulling the two ends of the traction line makes the traction line loop tightly looped on the rolled woven fabric. Wherein, after the two rolls of fabric are pressed close to each other and sewn together into one roll, the two holes on the fabric for the traction line to pass through are located on the outermost layer of fabric and at the top of the fabric that is sewn together into one roll.

3. The method for fixing the end of an artificial ligament according to claim 2, characterized in that, Before the fabric is rolled up, the distance between the two holes on the fabric for the traction thread to pass through is 1 / 10 to 1 / 5 of the fabric width at that point.

4. The method for fixing the end of an artificial ligament according to claim 2, characterized in that, S13 includes: Two rolls of fabric are pressed together to form a roll, and then sewn together towards the end of the braided section. The sewing stops when the fabric is a certain distance from the hole on the fabric through which the traction thread passes. The traction thread loop on the back of the fabric is passed through the rolled fabric to the top side of the rolled fabric, and then the traction thread loop is twisted and then looped through the rolled fabric. The remaining sewing is then completed, except that the fabric portion corresponding to the end of the braided section is not sewn. Finally, the two ends of the traction thread are pulled to tighten the traction thread loop onto the rolled fabric.

5. The method for fixing the end of an artificial ligament according to claim 1, characterized in that, S1 includes: S11': Roll the two sides of the fabric in the width direction toward the middle to form two rolls of fabric; S12': The traction line is wound around the two rolls of fabric. After winding, the middle part of the traction line is placed horizontally at the top of the two rolls of fabric, and the two ends of the traction line extend to the bottom of the two rolls of fabric and then wrap back to the top of the two rolls of fabric. S13': Insert a traction needle, which is fixed at one end of the traction line, into one roll of fabric. After passing through several layers of fabric, the traction needle moves toward the end of the fabric until it brings the traction line fixed to it out of the end of the fabric. Insert another traction needle, which is fixed at the other end of the traction line, into another roll of fabric. After passing through several layers of fabric, the other traction needle moves toward the end of the fabric until it brings the traction line fixed to it out of the end of the fabric. S14': The bottoms of the two rolls of fabric are connected by the fabric itself, the two rolls of fabric are pressed close to each other and the tops of the two rolls of fabric are sewn together to form a roll; S15': Pull both ends of the traction line to tighten the traction line onto the fabric that has been sewn into a roll; Wherein, the two ends of the traction line cross each other when extending to the bottom of the two rolls of fabric and then wrap back to the top of the two rolls of fabric, without crossing each other after wrapping back to the top of the two rolls of fabric; the two traction needles, which are respectively fixedly connected to the two ends of the traction line, are respectively fixedly connected to the corresponding end of the traction line before S13'.

6. The method for fixing the end of an artificial ligament according to any one of claims 1 to 5, characterized in that, Along the axial direction of the braided portion, the direction opposite to the end direction of the braided portion is the middle direction of the braided portion; the winding thread is divided into three segments, namely the first end of the winding thread, the middle of the winding thread, and the second end of the winding thread; S2 includes: S21: Place the winding thread at the end of the braided part; the placement method is such that the first end of the winding thread extends towards the end of the braided part, the winding thread wraps around the middle part once, and the second end of the winding thread extends towards the middle of the braided part. S22: The middle part of the winding thread is used to wrap around and bind the end of the braided part. When wrapping, the middle part of the winding thread starts to wrap from the part near the second end of the winding thread, and the end of the braided part starts to wrap from the outermost end towards the middle of the braided part. S23: After the end of the braided part is fully wrapped around the middle of the winding thread, the first end of the winding thread is pulled to bind and tighten the winding thread at the end of the braided part.

7. The method for fixing the end of an artificial ligament according to any one of claims 1 to 5, characterized in that, Along the axial direction of the braided portion, the direction opposite to the end direction of the braided portion is the middle direction of the braided portion; S2 includes: S21': The winding thread is knotted and tightened at the outermost end of the braided part. The winding thread is divided into two segments from the knotted point, namely the first segment and the second segment. The first segment of the winding thread is placed on the braided part in a manner that extends toward the middle of the braided part. S22': The second segment of the winding thread is used to wrap around and bind the end of the braided part. When wrapping, the second segment of the winding thread starts to wrap from the part near the knot of the winding thread, and wraps around the end of the braided part from the outermost end toward the middle of the braided part. When the second segment of the winding thread wraps around the end of the braided part, part of the auxiliary thread will be placed on the end of the braided part and wrapped in together. After the wrapping is completed, both ends of the auxiliary thread are not covered by the winding thread loop and both extend toward the end of the braided part. In the middle direction of the braided part, part of the auxiliary thread is not covered by the winding thread loop and the uncovered part forms an auxiliary thread bend. S23': After the second segment of the winding thread is finished, it passes through the auxiliary cord bend, and then the two ends of the auxiliary line are pulled to pass the second segment of the winding thread through the gap between the winding thread coil and the braided part through the auxiliary cord bend, and then the covered part of the winding thread coil is pulled out. S24': Pull the second segment of the winding thread away from the knot from the second segment of the winding thread, and tighten it so that the second segment of the winding thread is bound and tightened at the end of the braid.

8. The method for fixing the end of an artificial ligament according to claim 7, characterized in that, S22' includes: S221': The second segment of the winding thread starts to wrap around the outermost end of the braided part, and stops wrapping after a certain distance; S222': The auxiliary line is placed on the end of the braiding part, and the placement method is such that the middle part of the auxiliary line is located on one side of the middle part of the end of the braiding part, and the middle part of the auxiliary line is bent to form the auxiliary line rope bend. Both ends of the auxiliary line extend towards the end of the braiding part and extend to the winding coil area at this time or pass through and extend out of the winding coil area at this time. S223': The winding line continues to loop until the end of the braided part is fully wrapped. At this time, the auxiliary line on the braided part is also wound in during the looping.

9. The method for fixing the end of an artificial ligament according to claim 7, characterized in that, Along the axial direction of the braided portion, the length of the auxiliary line together with the end of the braided portion wrapped by the winding line accounts for 1 / 3 to 2 / 3 of the length of the end of the braided portion.

10. An artificial ligament, characterized in that, The end of the artificial ligament is made by the method for fixing the end of the artificial ligament as described in any one of claims 1 to 9.

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