Ligament fixation device

Abstract

This invention relates to a ligament fixation device, comprising a fixation component and a clamping component. The fixation component includes a fixation plate and a positioning pin. The fixation plate has multiple through holes, and the positioning pin is connected to the fixation plate. The through holes provide space for the ligament to pass through. The clamping component includes a pressure plate, which is connected to the fixation plate, thereby clamping and fixing the ligament passing through the through holes between the pressure plate and the fixation plate. This ligament fixation device utilizes the pressure plate and the fixation plate to clamp and fix the ligament passing through the through holes, avoiding damage to the ligament and eliminating the need to compress the inner wall of the bone marrow tract to fix the ligament, thus reducing damage to the bone tissue of the bone marrow tract. Therefore, the ligament fixation device of this invention can effectively fix the ligament with minimal damage, and also reduces damage to the bone tissue of the bone tunnel inner wall, thereby promoting bone and ligament healing.

Description

Technical Field

[0001] This invention relates to the field of orthopedic medical devices, and in particular to a ligament fixation device. Background Technology

[0002] When the anterior and posterior cruciate ligaments of the human knee joint are injured, the injured ligaments need to be reconstructed and fixed. At present, clinicians generally use interface screws or interface screws with fixation sheaths to fix the ligaments in the bone tunnel by compression.

[0003] Among them, when using interface screws for individual fixation, the threads will cause varying degrees of damage to the ligaments due to rotational friction during the process of screwing into the bone tunnel. The greater the tightening force of the interface screw, the greater the damage to the ligaments.

[0004] The combination of interface screws and fixation sheaths requires placing the fixation sheath inside the bone tunnel first. Although this reduces the damage to the ligaments caused by the threads of the interface screws, the fixation sheath exerts a large compressive force on the bone tissue inside the bone tunnel when it is stretched open. As a result, the bone damage is greater and it is not conducive to the healing of bone and ligaments. Summary of the Invention

[0005] Based on this, a ligament fixation device is provided to solve the problem of how to effectively fix the ligament while minimizing damage to it, and also reduce damage to the bone tissue inside the bone tunnel.

[0006] This invention provides a ligament fixation device, comprising:

[0007] The fastener includes a fixing plate and a positioning pin. The fixing plate is provided with multiple through holes, and the positioning pin is connected to the fixing plate. The through holes are used to provide space for the ligament to pass through.

[0008] A clamping element includes a pressure plate for connecting to a fixing plate, such that a ligament passing through the through hole is clamped and fixed between the pressure plate and the fixing plate.

[0009] When the aforementioned ligament fixation device fixes ligaments, it uses a pressure plate and a fixation plate to clamp and fix the ligament passing through the through hole, which can avoid damage to the ligament. Furthermore, it eliminates the need to fix the ligament by compressing the inner wall of the bone marrow tract, thereby reducing damage to the bone tissue of the inner wall of the bone marrow tract. Therefore, the ligament fixation device of the present invention can effectively fix ligaments with minimal damage, and also reduces damage to the bone tissue of the inner wall of the bone tunnel, thus promoting bone and ligament healing.

[0010] In one embodiment, when the pressure plate is connected to the fixing plate, the pressure plate covers at least a portion of each of the through holes. By covering the through holes with the pressure plate, ligaments passing through the through holes can be easily compressed, improving operational convenience.

[0011] In one embodiment, the fixing plate is provided with a threaded hole that extends axially along the locating pin and penetrates the proximal end face of the fixing plate. The clamping member includes a stud connected to the pressure plate, which engages with the threaded hole to bring the pressure plate close to the fixing plate. This utilizes the threaded engagement of the stud with the threaded hole to provide clamping force on the ligament using the pressure plate and the fixing plate. This method is simple to operate, and the engagement between the stud and the threaded hole is stable and reliable.

[0012] In one embodiment, the pressure plate is provided with multiple claws, which engage with the fixing plate, thereby clamping and fixing the ligament located between the pressure plate and the fixing plate. This structure is simple and easy to operate.

[0013] In one embodiment, the pressure plate and the fixing plate are magnetically engaged, so that the pressure plate and the fixing plate clamp and fix the ligament located between them. The magnetic engagement improves the convenience of the ligament fixation operation and utilizes the magnetic force to provide sufficient clamping force for the pressure plate and the fixing plate to fix the ligament.

[0014] In one embodiment, the pressure plate is provided with a drive hole located on the side of the pressure plate opposite to the fixing plate. The drive hole facilitates the use of tools to clamp the pressure plate.

[0015] In one embodiment, the end of the positioning pin is provided with a rounded chamfer. When the positioning pin is inserted into the bone marrow tract, the rounded chamfer can serve as a guide, making it easier for the positioning pin to be inserted into the bone tunnel. Furthermore, after the positioning pin is inserted into the bone marrow tract, the rounded chamfer is less likely to cause stress concentration, thereby reducing damage to the bone within the tunnel.

[0016] In one embodiment, the fixation element is made of stainless steel, titanium, titanium alloy, organic polymer, or biodegradable material; and / or, the clamping element is made of stainless steel, titanium, titanium alloy, organic polymer, or biodegradable material. These materials have good biocompatibility to minimize adverse effects on tissues after the ligament fixation device is implanted.

[0017] In one embodiment, the fixation plate is provided with multiple slots, each slot extending through the edge of the fixation plate and connecting to a plurality of through holes. The slots facilitate the quick sliding of ligaments from the side of the fixation plate into the corresponding through holes, making the operation more convenient, shortening the surgical time, and reducing patient discomfort.

[0018] In one embodiment, a boss is provided on the side of the fixing plate facing the pressure plate. The boss prevents the ligament from rotating with the pressure plate, thus avoiding ligament entanglement and injury. Moreover, when the pressure plate and fixing plate compress the ligament located between them, the boss ensures that a gap remains between the pressure plate and fixing plate to prevent excessive pressure on the ligament and subsequent damage.

[0019] In one embodiment, the outer diameter of the boss is 0.4 cm to 1 cm. Within this range, the boss is neither too large, which would result in too large a gap between the pressure plate and the fixing plate, adversely affecting the stability of ligament clamping, nor too small, which would result in excessive clamping force exerted by the pressure plate and the fixing plate on the ligament located between them, causing ligament damage.

[0020] In one embodiment, the locating pin is prismatic or conical. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the ligament fixation device provided in the first embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the ligament fixation device provided in the second embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the ligament fixation device provided in the third embodiment of the present invention;

[0025] Figure 4 This is an axial sectional view of the ligament fixation device provided in the third embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the use of the ligament fixation device provided in the third embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the ligament fixation device provided in the fourth embodiment of the present invention.

[0028] Reference numerals: 10, fastener; 11, fixing plate; 11a, proximal end face of fixing plate; 12, locating pin; 13, threaded hole; 14, through hole; 15, rounded chamfer; 16, groove; 17, boss; 20, clamping element; 21, pressure plate; 21a, proximal end face of pressure plate; 22, stud; 23, drive hole; 24, pawl; 30, ligament. Detailed Implementation

[0029] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0030] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] It should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0034] Furthermore, in medical devices, the end furthest from the operator is called the "distal end," and the end closest to the operator is called the "proximal end." Correspondingly, the proximal face of a component refers to the end face of the component closest to the operator. For example, Figure 1 In the ligament fixation device shown, the right end face of the fixation plate is the "proximal end face of the fixation plate", and the right end face of the pressure plate is the "proximal end face of the pressure plate".

[0035] Example 1

[0036] See Figure 1 As shown, Figure 1 This is a schematic diagram of the ligament fixation device provided in the first embodiment of the present invention. The ligament fixation device includes a fixation member 10 and a clamping member 20. The fixation member 10 includes a fixation plate 11 and a positioning pin 12. The positioning pin 12 is connected to the fixation plate 11 and is used to be implanted into the medullary tract to fix the fixation plate 11 to the bone, so that when the clamping member 22 is connected to the fixation member 10, the fixation plate 11 is less likely to loosen relative to the bone. The positioning pin 12 can be prismatic or conical. A conical positioning pin 12 can be easily implanted into the medullary tract. A prismatic positioning pin 12 is less likely to rotate after implantation into the medullary tract and provides greater axial pull-out force, thereby improving the connection stability between the fixation plate 11 and the bone. The shape of the positioning pin 12 is not limited here.

[0037] The fixing plate 11 of the fixing member 10 is provided with a threaded hole 13 and a plurality of through holes 14. Understandably, the plurality of through holes 14 are spaced apart from the threaded hole 13. The threaded hole 13 extends axially along the positioning pin 12 and penetrates the proximal end face 11a of the fixing plate 11 (i.e., the surface of the fixing plate 11 facing away from the positioning pin 12). The through holes 14 are used to provide space for the ligament to pass through, that is, the ligament can pass through the fixing plate 11 through the through hole 14. Then the ligament is confined at the through hole 14 of the fixing plate 11. Since the through hole 14 and the threaded hole 13 are spaced apart, the ligament confined in the through hole 14 is kept at a distance from the threaded hole 13, that is, the ligament avoids the threaded hole 13. Therefore, when the clamping member 20 engages with the threaded hole 13, the thread will not cause the ligament to be entangled.

[0038] Specifically, the clamping member 20 includes a pressure plate 21 and a stud 22 connected to the pressure plate 21. The stud 22 cooperates with the threaded hole 13, so that the pressure plate 21 is close to the fixing plate 11 to clamp and fix the ligament that passes through the through hole 14 between the pressure plate 21 and the fixing plate 11.

[0039] It should be noted that the threaded hole 13 can be a standard thread or a non-standard thread, and correspondingly, the stud 22 can be a standard thread or a non-standard thread. As long as the threaded hole 13 and the stud 22 form a threaded pair through threaded engagement, allowing the pressure plate 21 to approach the fixing plate 11 under the force of the threaded engagement to clamp and fix the ligament.

[0040] The ligament fixation device of this embodiment uses a pressure plate 21 and a fixing plate 11 to clamp and fix the ligament passing through the through hole 14. Since the ligament passes through the through hole 14, which is spaced apart from the threaded hole 13, contact between the ligament and the stud 22 is effectively avoided, thus preventing damage to the ligament when the stud 22 is screwed into the threaded hole 13. Furthermore, using the pressure plate 21 and the fixing plate 11 to clamp the ligament maintains a flat clamping surface. When fixing the ligament, this device does not require pressing the ligament tightly against the inner wall of the bone marrow tract, thereby reducing damage to the bone tissue of the inner wall of the bone marrow tract. Therefore, the ligament fixation device of this invention can effectively fix the ligament and reduce damage to the ligament, while also reducing damage to the bone tissue of the inner wall of the bone tunnel, thus promoting bone and ligament healing.

[0041] When using this ligament fixation device to fix the ligament, the ligament is first passed through the through holes 14 of the fixation plate 11, and the positioning pin 12 is inserted into the medullary tract to fix the fixation plate 11 to the bone. Then, while bending the ligament, the stud 22 is rotated to engage with the threaded hole 13, connecting the pressure plate 21 to the fixation plate 11. As the stud 22 engages with the threaded hole 13, the pressure plate 21 gradually moves closer to the fixation plate 11, ultimately clamping and fixing the ligament passing through the through hole 14 between the pressure plate 21 and the fixation plate 11. During this operation, because the positioning pin 12 is inserted into the medullary tract, it will not loosen, thus providing a reaction force for the threaded engagement of the stud 22 and the threaded hole 13, allowing the stud 22 to smoothly engage with the threaded hole 13.

[0042] It should be noted that when the pressure plate 21 and the fixing plate 11 clamp and fix the ligament, the pressure plate 21 may not cover the through hole 14. For example, the pressure plate 21 may have holes corresponding to the through hole 14. After the ligament passes through the through hole 14, it bends relative to the proximal end face 11a of the fixing plate 11. The pressure plate 21 compresses the ligament so that it adheres tightly to the proximal end face 11a, thus fixing the ligament. In some embodiments, when the pressure plate 21 is connected to the fixing plate 11, the pressure plate 21 may also be a structure that covers at least part of each through hole 14. Therefore, it is not necessary to align the pressure plate 21. The pressure plate 21 can be used to cover the through hole 14 to conveniently compress the ligament passing through the through hole 14, and finally clamp and fix the ligament between the pressure plate 21 and the fixing plate 11.

[0043] In some embodiments, the clamping member 20 has a driving hole 23 on its pressure plate 21, which is located on the side of the pressure plate 21 facing away from the fixing plate 11 (i.e., the near end face 21a of the pressure plate 21). The driving hole 23 facilitates the cooperation between the pressure plate 21 and the driving tool, so that the driving tool can apply torque to the clamping member 20, causing the stud 22 to be screwed into the threaded hole 13.

[0044] The cross-sectional shape of the drive hole 23 can be straight, cross-shaped, regular polygonal, or quincunx-shaped to adapt to the corresponding drive tool. The regular polygon can be designed as an equilateral triangle, square, or regular hexagon, and is not limited thereto. In one embodiment, taking a quincunx-shaped cross-section of the drive hole 23 as an example, the output end of the drive tool adapted to this drive hole 23 is quincunx-shaped, such as a quincunx screwdriver. This quincunx-shaped drive hole 23 facilitates the operation of the drive tool and provides high mechanical performance.

[0045] The threaded hole 13 penetrates vertically through the center of the fixing plate 11, and correspondingly, the stud 22 is vertically positioned at the center of the pressure plate 21. The drive hole 23 is coaxially arranged with the stud 22 and located on the side of the pressure plate 21 opposite to the stud 22. This allows the stud 22 to be screwed into the threaded hole 13 more easily when the pressure plate 21 is rotated using a drive tool. The cooperation between the stud 22 and the threaded hole 13 ensures a more consistent clamping and fixing effect on the ligament between the pressure plate 21 and the fixing plate 11.

[0046] Furthermore, multiple through holes 14 are evenly arranged around the threaded hole 13, so that the clamping force of the pressure plate 21 and the fixing plate 11 on the ligaments located at different through holes 14 is relatively consistent.

[0047] In some embodiments, the end of the positioning pin 12 is provided with a rounded chamfer 15, so that when the positioning pin 12 is implanted into the bone marrow tract, the rounded chamfer 15 can serve as a guide, making it easier for the positioning pin 12 to be implanted into the bone tunnel, and after the positioning pin 12 is implanted into the bone marrow tract, the rounded chamfer 15 is less likely to cause stress concentration, thereby reducing damage to the bone in the tunnel.

[0048] Fixation element 10 can be made of stainless steel, titanium, titanium alloy, organic polymer material, or biodegradable material. Clamping element 20 can also be made of stainless steel, titanium, titanium alloy, organic polymer material, or biodegradable material. This ensures good biocompatibility after the ligament fixation device is implanted, reducing adverse effects on tissues. The material types for fixation element 10 and clamping element 20 are not limited here.

[0049] In some embodiments, the positioning pins 12 on the fixation plate 11 only need to be adaptable to fixation within the bone marrow tract in order to control the depth of insertion of the positioning pins 12 into the bone tunnel, thereby facilitating bone and ligament healing. For example, the length of the positioning pins 12 is 3cm to 5cm, such as 3cm, 4cm, or 5cm, so that the length of the positioning pins 12 is appropriate, not too long and easily inserted too deeply into the bone marrow tract, causing damage to the bone marrow tract, nor too short and resulting in insufficient insertion depth into the bone marrow tract, which can easily lead to loosening.

[0050] The diameter of the fixation plate 11 is 1cm to 3cm, for example, 1cm, 2cm or 3cm. By controlling the diameter of the fixation plate 11 within the above range, the area of ​​the fixation plate 11 is large enough so that when the ligament fixation device is subjected to axial tension, the fixation plate 11 adheres to the bone surface to generate sufficient reaction force to tighten the ligament and avoid axial contraction of the ligament.

[0051] The thickness of the fixing plate 11 is not limited. For example, the thickness of the fixing plate 11 is 0.5cm to 3cm, such as 0.5cm, 1.5cm, 2.5cm or 3cm.

[0052] In other embodiments, a boss may be provided on the side of the fixing plate 11 facing the pressure plate 21. Figure 1 (Not shown in the image).

[0053] Example 2

[0054] Figure 2 This is a schematic diagram of the ligament fixation device provided in the second embodiment of the present invention. (In conjunction with...) Figure 2 As shown, this embodiment provides a ligament fixation device and Figure 1 The structure of the ligament fixation device shown in the first embodiment is roughly the same as that of the other two. The difference is that in the ligament fixation device of this embodiment, the fixation plate 11 is provided with a plurality of slots 16. The plurality of slots 16 are respectively connected to the through holes 14 through the edge of the fixation plate 11. The slots 16 are used to guide the ligament to quickly enter the corresponding through holes 14, so as to make the operation more convenient, shorten the operation time, and reduce the patient's pain.

[0055] Furthermore, the edges of the groove 16 are chamfered to make them smooth, so as to facilitate the smooth and quick sliding of the ligament into the corresponding through hole 14, and the smooth edges of the groove 16 also reduce damage to the ligament.

[0056] Example 3

[0057] Combination Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the ligament fixation device provided in the third embodiment of the present invention. Figure 4This is an axial sectional view of the ligament fixation device provided in the third embodiment of the present invention. This embodiment provides a ligament fixation device and... Figure 2 The ligament fixation device shown in the second embodiment is largely the same, except that in this embodiment, the fixing plate 11 has a boss 17 on the side facing the pressure plate 21. When the clamping member 20 approaches the fixing member 10 to compress the ligament, the boss 17 prevents the ligament from rotating with the pressure plate 21, thus avoiding ligament entanglement and damage. Furthermore, when the pressure plate 21 and the fixing plate 11 compress the ligament located between them, the boss 17 ensures that a gap remains between the pressure plate 21 and the fixing plate 11, preventing excessive pressure on the ligament and subsequent damage.

[0058] The shape of the boss 17 can be spherical, trapezoidal, triangular or any other shape, and is not limited here.

[0059] The outer diameter of the boss 17 is 0.4cm to 1cm, for example, 0.4cm, 0.6cm, 0.8cm or 1cm. Within this range, the boss 17 is not too large, which would cause the gap between the pressure plate 21 and the fixing plate 11 to be too large, which would have an adverse effect on the stability of ligament clamping, nor is it too small, which would cause the pressure plate 21 and the fixing plate 11 to exert excessive clamping force on the ligament located between them, causing ligament damage.

[0060] Combination Figure 5 As shown, Figure 5 This is a schematic diagram of the use of the ligament fixation device provided in the third embodiment of the present invention. Specifically, when fixing the ligament 30 using the above-mentioned ligament fixation device, firstly, the positioning pin 12 of the fixation member 10 is inserted into the bone tunnel, and the ligament 30 is respectively slid into the through hole 14 of the fixation plate 11 along the groove 16; then, while bending the ligament 30, the stud 22 of the clamping member 20 is screwed into the threaded hole 13 of the fixation member 10 using the driving tool in cooperation with the driving hole 23. As the stud 22 is continuously screwed into the threaded hole 13, the gap between the pressure plate 21 and the fixation plate 11 gradually decreases, and finally the ligament 30 is clamped, thus completing the fixation of the ligament 30.

[0061] Example 4

[0062] Combination Figure 6 As shown, Figure 6 This is a schematic diagram of the ligament fixation device provided in the fourth embodiment of the present invention. This embodiment provides a ligament fixation device and... Figure 3The ligament fixation device shown in the third embodiment is largely the same, except that the detachable connection between the pressure plate 21 and the fixation plate 11 is different in this embodiment. Specifically, the pressure plate 21 of the clamping member 20 is provided with multiple claws 24. By using the claws 24 to engage with the fixation plate 11, the pressure plate 21 and the fixation plate 11 clamp the ligament located between them, so as to achieve ligament fixation.

[0063] It should be noted that the clamping force of the fixing plate 11 and the pressure plate 21 on the ligament located between them can be a locking structure in which the stud 22 and the threaded hole 13 are threaded together as in Embodiment 1, or a locking structure in which the claw 24 generates a locking force on the fixing plate 11 as in Embodiment 4. In other embodiments, the pressure plate 21 and the fixing plate 11 can also be magnetically coupled to clamp and fix the ligament located between them.

[0064] In summary, when the ligament fixation device in this embodiment fixes the ligament, it uses the pressure plate 21 and the fixing plate 11 to clamp and fix the ligament passing through the through hole 14. This eliminates the need to fix the ligament by compressing the inner wall of the bone marrow tract, thereby reducing damage to the bone of the inner wall of the bone marrow tract and avoiding damage to the ligament caused by the threaded structure. Therefore, the ligament fixation device of this invention can effectively fix the ligament with minimal damage, and also reduces damage to the bone of the inner wall of the bone tunnel, thus promoting bone and ligament healing.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A ligament fixation device, characterized in that, include: The fastener includes a fixing plate and a positioning pin. The fixing plate is provided with multiple through holes, and the positioning pin is connected to the fixing plate. The through holes are used to provide space for the ligament to pass through. A clamping element includes a pressure plate for detachable connection to a fixing plate. When the pressure plate is connected to the fixing plate, the pressure plate covers at least a portion of each of the through holes to compress ligaments passing through the through holes, such that the ligaments passing through the through holes are clamped and fixed between the pressure plate and the fixing plate.

2. The ligament fixation device according to claim 1, characterized in that, The fixing plate is provided with a threaded hole that extends axially along the positioning pin and penetrates the near end face of the fixing plate. The clamping member includes a stud connected to the pressure plate. The stud engages with the threaded hole to bring the pressure plate close to the fixing plate.

3. The ligament fixation device according to claim 1, characterized in that, The pressure plate is provided with multiple claws, which are used to engage with the fixing plate, so that the pressure plate and the fixing plate clamp and fix the ligament located between them.

4. The ligament fixation device according to claim 1, characterized in that, The pressure plate and the fixing plate are magnetically attracted to each other, so that the pressure plate and the fixing plate clamp and fix the ligament located between them.

5. The ligament fixation device according to claim 1, characterized in that, The pressure plate is provided with a driving hole, which is located on the side of the pressure plate opposite to the fixing plate.

6. The ligament fixation device according to claim 1, characterized in that, The end of the locating pin is provided with a rounded chamfer.

7. The ligament fixation device according to claim 1, characterized in that, The fastener is made of stainless steel, titanium, titanium alloy, organic polymer, or biodegradable material; and / or the clamping element is made of stainless steel, titanium, titanium alloy, organic polymer, or biodegradable material.

8. The ligament fixation device according to claim 1, characterized in that, The fixing plate is provided with multiple slots, and the multiple slots are respectively connected to the multiple through holes through the edge of the fixing plate.

9. The ligament fixation device according to claim 1, characterized in that, The fixing plate has a boss on the side facing the pressure plate.

10. The ligament fixation device according to claim 9, characterized in that, The outer diameter of the boss is 0.4cm to 1cm.

11. The ligament fixation device according to claim 1, characterized in that, The locating pin is prismatic or conical.

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