Anchors and anchor implant systems

Abstract

The application relates to the technical field of medical devices, in particular to an anchor assembly and an anchor implantation system. The anchor assembly comprises a plurality of first anchor units. Each first anchor unit comprises a first anchor and a first suture segment wound around the first anchor. One end of the first suture segment is a first pulling end used for connecting with an adjacent first anchor unit. When the first pulling end is pulled, the first suture segment is wound into a locking knot, and the first suture segment is bound to the first anchor. The application aims to solve at least one technical problem in the background art and provides an anchor assembly and an anchor implantation system.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to an anchor assembly and an anchor implantation system. Background Technology

[0002] Existing bone anchors are all monolithic structures, consisting of inner row anchors with their own sutures for suturing bone and soft tissue, and outer row anchors without their own sutures for sutures drawn from the inner row anchors to complete the suturing of soft tissue and bone. If multiple anchors are needed in a single surgery, each anchor is implanted separately to repair the bone and soft tissue. To address this cumbersome surgical procedure, a multi-anchor implant has emerged, connecting multiple anchors in series for continuous fixation. This multi-anchor structure incorporates a separate locking mechanism, typically a single locking suture, to prevent relative displacement of the sutures on the anchors. However, in actual testing, it was found that with continuous implantation, the sutures on the previous anchor are inevitably affected by the traction of the subsequent anchor and its sutures. The locking knot is prone to loosening due to traction during continuous implantation, leading to suture slippage and ultimately affecting the stability of the continuous suture fixation. Summary of the Invention

[0003] The purpose of this application is to provide an anchor assembly and an anchor implantation system to address at least one of the technical problems involved in the background art.

[0004] To achieve the above objectives, this application adopts the following technical solution: One aspect of this application provides an anchor assembly including a plurality of first anchor units, each first anchor unit including a first anchor and a first thread segment wound around the first anchor, one end of the first thread segment being a first pull end for connecting with an adjacent first anchor unit, the first pull end being used to cause the first thread segment to wind itself into a locking knot when pulled, thereby binding the first thread segment to the first anchor.

[0005] Optionally, the first anchor includes a first entry segment, a first exit segment, and a first connecting segment. The first entry segment, the first connecting segment, and the first exit segment are sequentially connected to form a U-shaped structure. The first stitch segment passes through the first entry segment and the first exit segment so that the locking knot is located between the first entry segment, the first connecting segment, and the first exit segment.

[0006] The beneficial effects of this technical solution are as follows: the locking knot is located inside the U-shaped structure, which can reduce the direct contact between the locking knot and bone or soft tissue during implantation and help reduce the interference of external factors on the shape of the locking knot.

[0007] Optionally, the first thread inlet segment is provided with a first front thread inlet hole and a first rear thread inlet hole, the first front thread inlet hole being located near the opening of the U-shaped structure and the first rear thread inlet hole being located near the first connecting segment; the first thread outlet segment is provided with a first front thread outlet hole and a first rear thread outlet hole, the first front thread outlet hole being located near the opening of the U-shaped structure and the first rear thread outlet hole being located near the first connecting segment; the first thread segment sequentially passes through the first front thread inlet hole from the inside to the outside of the U-shaped structure, passes through the first rear thread inlet hole from the outside to the inside of the U-shaped structure, passes through the first rear thread outlet hole from the inside to the outside of the U-shaped structure, and passes through the first front thread outlet hole from the outside to the inside of the U-shaped structure, the first pulling end being located at the portion of the first thread segment extending from the first front thread outlet hole.

[0008] The beneficial effects of this technical solution are as follows: By coordinating the distribution of the suture holes and the threading path, the first suture segment can easily form multiple intersecting areas between the first inlet segment and the first outlet segment. These intersecting areas can provide multiple friction contact points for the first suture segment when it is under tension. At the same time, the arrangement of the first front inlet hole and the first front outlet hole close to the opening of the U-shaped structure ensures that the pull-out direction of the first traction end is consistent with the tightening direction of the locking knot, which helps to reduce the probability of the locking knot shape changing due to the deviation of the force direction during continuous implantation.

[0009] Optionally, the first suture segment includes a transition segment located between the first front suture inlet and the first rear suture inlet. The first suture segment passes through the first rear suture outlet and then through the transition segment and the first suture inlet to form a reserved suture loop between the transition segment and the first rear suture outlet. The first suture segment then passes through the reserved suture loop and the first front suture outlet in sequence.

[0010] The beneficial effects of this technical solution are as follows: After the first suture segment passes through the reserved loop, it forms a pre-knot. By continuously pulling the first traction end, the pre-knot eventually forms a locking knot. Through the aforementioned reserved loop, a portion of the first suture segment forms a reserved loop after passing through the gap between the transition section and the first entry section. The position of the reserved loop is constrained by the transition section and the first entry section. When the first traction end is subjected to tension, the reserved loop can gradually contract as the first suture segment moves. The contraction direction of the reserved loop is consistent with the tension direction of the first traction end, which is beneficial for the first suture segment to converge along a predetermined path during the stress process. At the same time, after the current first anchor is implanted, the suture between the current first anchor and the previously implanted anchor can be tightened by pulling the reserved loop.

[0011] Optionally, the other end of the first suture segment is a first connecting end, and the anchor assembly further includes a second anchor unit. The second anchor unit includes a second anchor and a second suture segment wrapped around the second anchor. One end of the second suture segment is a second pulling end, and the other end of the second suture segment is a second connecting end. The second pulling end is fixedly connected to the second connecting end, and the second pulling end is connected to the first connecting end.

[0012] The beneficial effects of this technical solution are as follows: The first anchor unit and the second anchor unit are connected in series through the connection of the first connecting end and the second pulling end, allowing the second anchor unit and the first anchor unit to be implanted sequentially. The second pulling end of the second suture segment is fixedly connected to the second connecting end, forming a closed loop structure on the second anchor. When the second anchor unit is implanted, pulling the second pulling end simultaneously results in a reverse constraint force from the second connecting end. This constraint force helps the second suture segment form a tangled lock on the second anchor. Furthermore, the connection between the second pulling end and the first connecting end allows the second suture segment to apply tension to the first suture segment through this connection point during the stress process. The direction of this tension force is consistent with the formation direction of the locking knot of the first suture segment itself, which is beneficial for maintaining the state of the locking knot during subsequent anchor implantation.

[0013] Optionally, the second anchor includes a second inlet segment, a second outlet segment, and a second connecting segment, wherein the second inlet segment, the second connecting segment, and the second outlet segment are sequentially connected to form a U-shaped structure, and the second stitch segment passes through the second inlet segment and the second outlet segment.

[0014] The beneficial effects of this technical solution are as follows: In this way, the path of the second suture segment on the second anchor is constrained by the U-shaped structure. When the second traction end is subjected to tension, the force distribution of the second suture segment on both sides of the U-shaped structure is relatively uniform, which is conducive to the second suture segment forming a winding lock on the second anchor. At the same time, both the first anchor and the second anchor adopt a U-shaped structure, and their structural forms are consistent, which is conducive to maintaining the consistency of the force mode of each anchor unit during continuous implantation, thereby helping to reduce the operational complexity caused by the structural differences of each anchor unit.

[0015] Optionally, a first cavity is provided in the second anchor, through which the second inlet section, the second connecting section and the second outlet section pass in sequence. The second suture section includes a mating section located in the first cavity, and the inner wall of the first cavity fits against the mating section.

[0016] The beneficial effect of this technical solution is that when the second pulling end is subjected to tension, the mating section tends to move along the extension direction of the first cavity. At this time, friction is generated between the outer wall of the mating section and the inner wall of the first cavity. The direction of this friction is opposite to the direction of the moving trend of the mating section, so that the friction forms resistance to the movement of the mating section. This makes the second seam segment need to overcome this resistance to generate relative displacement during the force process, which is conducive to the second seam segment being firmly fixed on the second anchor.

[0017] Optionally, the second thread inlet segment is provided with a second front thread inlet hole and a second rear thread inlet hole, the second front thread inlet hole being located near the opening of the U-shaped structure and the second rear thread inlet hole being located near the second connecting segment; the second thread outlet segment is provided with a second front thread outlet hole and a second rear thread outlet hole, the second front thread outlet hole being located near the opening of the U-shaped structure and the second rear thread outlet hole being located near the second connecting segment; the second suture segment sequentially passes through the second front thread inlet hole from the inside to the outside of the U-shaped structure, passes through the second rear thread inlet hole from the outside to the inside of the U-shaped structure and enters the first cavity, passes through the second rear thread outlet hole from the inside to the outside of the U-shaped structure through the first cavity and passes through the second front thread outlet hole from the outside to the inside of the U-shaped structure, and the second connecting end is connected to the second pulling end on the inner side of the U-shaped structure.

[0018] The beneficial effects of this technical solution are as follows: Through the cooperation of the aforementioned wire holes and the first cavity, the thread path of the second stitch segment passes sequentially through the second entry segment, the first cavity, and the second exit segment, forming a continuous thread channel that penetrates the second anchor. The arrangement of the second front entry hole and the second front exit hole close to the opening of the U-shaped structure ensures that both the entry and exit ends of the second stitch segment are located on the opening side of the U-shaped structure, which is beneficial for the second connecting end and the second pulling end to connect inside the U-shaped structure. Moreover, the arrangement of the second rear entry hole and the second rear exit hole close to the second connecting segment ensures that the thread path of the second stitch segment in the first cavity covers the bottom area of ​​the U-shaped structure, which helps to increase the contact range between the second stitch segment and the second anchor. At the same time, when the second pulling end is subjected to tension, the second stitch segment moves along the wire hole path, and the edges of each wire hole apply constraint forces in different directions to the second stitch segment, causing friction to accumulate at each turning point of the thread path. The accumulated friction helps to lock the second stitch segment to the second anchor.

[0019] Optionally, the second pulling end is provided with a second cavity, and the second connecting end is provided with a third cavity. The second pulling end is provided with a first mating hole, a second mating hole, and a third mating hole arranged sequentially in the direction away from the second anchor. The second connecting end is provided with a fourth mating hole and a fifth mating hole arranged sequentially in the direction away from the second anchor. The second connecting end enters the second cavity through the first mating hole and exits the second cavity through the second mating hole. The second pulling end enters the third cavity through the fourth mating hole and exits the third cavity through the fifth mating hole. The second connecting end then enters the second cavity through the third mating hole.

[0020] The beneficial effects of this technical solution are as follows: a portion of the second connecting end is located inside the second cavity, and a portion of the second pulling end is located inside the third cavity, forming a cross-entwined relationship where the second connecting end and the second pulling end penetrate each other's cavities. The reciprocating path of the second connecting end within the second cavity creates multiple contact areas between the second connecting end and the second pulling end within the second and third cavities. Each contact area generates frictional forces in different directions when subjected to force. When the second pulling end is subjected to tension, the second connecting end tends to move relative to the second pulling end. The direction of the frictional force in each contact area is opposite to the direction of this movement trend, thus restricting the relative movement between the second connecting end and the second pulling end by multi-directional frictional resistance. Simultaneously, the structural arrangement of the second connecting end re-entering the second cavity through the third mating hole further increases the number of frictional contact points between the second connecting end and the second pulling end, which is beneficial to improving the stability of the connection state between the second connecting end and the second pulling end.

[0021] Another aspect of this application provides an anchor implantation system, including the anchor assembly provided in this application.

[0022] The technical solution provided in this application can achieve at least one of the following beneficial effects: Compared to the existing serial multi-anchor structure which uses independent locking thread knots to achieve suture locking, the anchor assembly and anchor insertion system provided in this application form a locking knot by self-winding of the first suture segment. The first suture segment has the dual function of connecting adjacent anchor units and binding the first anchor. During continuous insertion, when the first pulling end is subjected to the pulling force generated by the subsequent insertion of the first anchor unit, this pulling force also acts on the formation of the locking knot. The locking state of the locking knot is consistent with the direction of the pulling force. Therefore, the disturbance to the locking knot caused by the subsequent insertion of the anchor unit is lower than that caused by the independent locking thread structure in the prior art. This helps to reduce the risk of the locking structure loosening during continuous insertion, thereby helping to maintain the stability of the suture tension between each anchor unit. At the same time, since there is no need to set up an independent locking thread structure, the overall structure of the anchor assembly is simplified, which helps to reduce manufacturing costs and assembly complexity.

[0023] The additional technical features and advantages of this application will become more apparent from the following description or from practical application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the specific embodiments of this application, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of one embodiment of the anchor assembly provided in this application. Figure 2 This is a structural schematic diagram of one embodiment of the first anchor unit provided in this application, wherein the solid arrow indicates the threading direction of the stitch; Figure 3 This is a structural schematic diagram of one embodiment of the second anchor unit provided in this application, wherein the solid arrow indicates the threading direction of the stitch; Figure 4 for Figure 3 A magnified view of a section at point A, where the solid arrow indicates the direction of the stitching. Figure 5a This is a structural schematic diagram of one state of the first anchor unit provided in an embodiment of this application, wherein the arrow marked with F indicates the direction of force, other solid arrows indicate the direction of movement of the sewing thread, and the dashed line is the position of the reserved thread loop after movement; Figure 5bThis is a structural schematic diagram of another state of one embodiment of the first anchor unit provided in this application, wherein the arrow marked with F indicates the direction of force, other solid arrows indicate the direction of movement of the sewing thread, and the dashed line is the position of the reserved thread loop after movement; Figure 5c This is a structural schematic diagram of a third state of an embodiment of the first anchor unit provided in this application, wherein the arrow marked with F indicates the direction of force, and the other solid arrows indicate the direction of movement of the sewing thread; Figure 5d This is a structural schematic diagram of a fourth state of an embodiment of the first anchor unit provided in this application, wherein the arrow marked with F indicates the direction of force.

[0026] Figure label: 01. Second anchor unit; 02. First anchor unit; 03. Sewing thread; 04. Pre-installed thread loop; 05. First connection end; 06. First incoming line segment; 07. Transition section; 08. First front entry hole; 09. First rear cable inlet hole; 10. First rear cable outlet hole; 11. Precast knot; 12. First front cable outlet hole; 13. First pulling end; 14. First exiting segment; 15. First anchor bolt; 16. First connecting section; 17. First seam segment; 18. Second entry seam segment; 19. Second rear cable entry hole; 20. Second connecting section; 21. Fitting section; 22. Second rear cable outlet hole; 23. Second cable exit section; 24. Second front cable exit hole; 25. Second front entry hole; 26. Second anchor pin; 27. Second suture segment; 28. First cavity; 29. Third mating hole; 30. Fifth mating hole; 31. Third cavity; 32. Second cavity; 33. Second mating hole; 34. First mating hole; 35. Second connecting end; 36. Second pulling end; 37. Fourth mating hole. Detailed Implementation

[0027] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] like Figures 1 to 5d As shown, one aspect of this application provides an anchor assembly including a plurality of first anchor units 02. Each first anchor unit 02 includes a first anchor 15 and a first thread segment 17 wrapped around the first anchor 15. One end of the first thread segment 17 is a first pull end 13 for connecting with an adjacent first anchor unit 02. The first pull end 13 is used to cause the first thread segment 17 to wrap itself into a locking knot when pulled, thereby binding the first thread segment 17 to the first anchor 15.

[0031] Compared to the existing serial multi-anchor structure which uses independent locking thread knots to achieve suture locking, the anchor assembly provided in this application uses a locking knot formed by the first suture segment 17 winding itself. The first suture segment 17 has the dual function of connecting adjacent anchor units and binding the first anchor 15. During continuous implantation, when the first pulling end 13 is subjected to the pulling force generated by the subsequent implantation of the first anchor unit 02, this pulling force also acts on the formation of the locking knot. The locking state of the locking knot is consistent with the direction of the pulling force. Therefore, the degree of disturbance to the locking knot caused by the subsequent implantation of anchor units is lower than that caused by the independent locking thread structure in the prior art. This helps to reduce the risk of the locking structure loosening during continuous implantation, thereby helping to maintain the stability of the suture tension between each anchor unit. At the same time, since there is no need to set up an independent locking thread structure, the overall structure of the anchor assembly is simplified, which helps to reduce manufacturing costs and assembly complexity.

[0032] Optionally, the first anchor 15 includes a first inlet segment 06, a first outlet segment 14, and a first connecting segment 16. The first inlet segment 06, the first connecting segment 16, and the first outlet segment 14 are sequentially connected to form a U-shaped structure. The first suture segment 17 passes through the first inlet segment 06 and the first outlet segment 14 so that the locking knot is located between the first inlet segment 06, the first connecting segment 16, and the first outlet segment 14. In this way, the locking knot is located on the inside of the U-shaped structure, which can reduce the direct contact between the locking knot and bone or soft tissue during implantation and help reduce the interference of external factors on the shape of the locking knot.

[0033] Optionally, the first thread entry segment 06 is provided with a first front thread entry hole 08 and a first rear thread entry hole 09, the first front thread entry hole 08 being located near the opening of the U-shaped structure, and the first rear thread entry hole 09 being located near the first connecting segment 16; the first thread exit segment 14 is provided with a first front thread exit hole 12 and a first rear thread exit hole 10, the first front thread exit hole 12 being located near the opening of the U-shaped structure, and the first rear thread exit hole 10 being located near the first connecting segment 16; the first thread segment 17 sequentially passes through the first front thread entry hole 08 from the inside to the outside of the U-shaped structure, passes through the first rear thread entry hole 09 from the outside to the inside of the U-shaped structure, passes through the first rear thread exit hole 10 from the inside to the outside of the U-shaped structure, and passes through the first front thread exit hole 12 from the outside to the inside of the U-shaped structure, and the first pulling end 13 is located at the portion of the first thread segment 17 extending from the first front thread exit hole 12. In this way, through the combination of the above-mentioned hole positions and threading paths, the first suture segment 17 can easily form multiple cross-looping areas between the first inlet segment 06 and the first outlet segment 14. These cross-looping areas can provide multiple friction contact points for the first suture segment 17 when under tension. At the same time, the way the first front inlet hole 08 and the first front outlet hole 12 are positioned close to the opening of the U-shaped structure makes the lead-out direction of the first traction end 13 consistent with the tightening direction of the locking knot, which helps to reduce the probability of the locking knot shape changing due to the deviation of the force direction during continuous implantation.

[0034] Optionally, the first stitch segment 17 includes a transition segment 07 located between the first front inlet hole 08 and the first rear inlet hole 09. The first stitch segment 17 passes through the first rear outlet hole 10 and then between the transition segment 07 and the first inlet segment 06 to form a reserved loop 04 between the transition segment 07 and the first rear outlet hole 10. The first stitch segment 17 then sequentially passes through the reserved loop 04 and the first front outlet hole 12. After passing through the reserved loop 04, the first stitch segment 17 forms a pre-knot 11. Continuous pulling of the first pulling end 13 eventually forms a locking knot. With the aforementioned reserved suture loop 04, a portion of the first suture segment 17 forms a reserved suture loop 04 after passing through the gap between the transition segment 07 and the first insertion segment 06. The position of the reserved suture loop 04 is constrained by the transition segment 07 and the first insertion segment 06. When the first pulling end 13 is subjected to tension, the reserved suture loop 04 can gradually contract as the first suture segment 17 moves. The contraction direction of the reserved suture loop 04 is consistent with the tension direction of the first pulling end 13, which is beneficial for the first suture segment 17 to converge along a predetermined path during the force process. At the same time, after the current first anchor 15 is implanted, the suture between the current first anchor 15 and the previously implanted anchor can be tightened by pulling the reserved suture loop 04.

[0035] like Figure 2 As shown, in one embodiment of this application, the first suture segment 17 passes sequentially from the inside to the outside of the U-shaped structure through the first front suture hole 08, from the outside to the inside of the U-shaped structure through the first rear suture hole 09, from the inside to the outside of the U-shaped structure through the first rear suture hole 10, passes between the transition section 07 and the first suture segment 06, passes through the reserved suture loop 04, and finally passes from the outside to the inside of the U-shaped structure through the first front suture hole 12.

[0036] Optionally, the other end of the first suture segment 17 is a first connecting end 05. The anchor assembly further includes a second anchor unit 01, which includes a second anchor 26 and a second suture segment 27 wrapped around the second anchor 26. One end of the second suture segment 27 is a second pulling end 36, and the other end of the second suture segment 27 is a second connecting end 35. The second pulling end 36 is fixedly connected to the second connecting end 35, and the second pulling end 36 is connected to the first connecting end 05. In this way, the first anchor unit 02 and the second anchor unit 01 are connected in series through the connection of the first connecting end 05 and the second pulling end 36, so that the second anchor unit 01 and the first anchor unit 02 can be implanted continuously. The second pulling end 36 of the second suture segment 27 is fixedly connected to the second connecting end 35, so that the second suture segment 27 forms a closed loop structure on the second anchor 26. When the second anchor unit 01 is implanted, when the second pulling end 36 is pulled, the second pulling end 36 is simultaneously subjected to a reverse constraint force from the second connecting end 35. This constraint force helps the second suture segment 27 to form a winding lock on the second anchor 26. At the same time, the connection relationship between the second pulling end 36 and the first connecting end 05 allows the second suture segment 27 to apply a pulling force to the first suture segment 17 through the connection point during the force application process. The direction of this pulling force is consistent with the formation direction of the locking knot of the first suture segment 17 itself, which is beneficial to maintaining the state of the locking knot during the subsequent anchor implantation process. Understandably, the first seam segment 17 and the second seam segment 27 are both part of the same seam 03, and the second anchor 26 and each of the first anchors 15 are connected together by this seam 03; the second anchor unit 01 is connected to the first first anchor unit 02, and then each of the first anchor units 02 is connected in sequence. In two adjacent first anchor units 02, the first connecting end 05 of the first first anchor unit 02 (the first anchor unit 02 located near the second anchor unit 01) is connected to the first pulling end 13 of the second first anchor unit 02 (the first anchor unit 02 located away from the second anchor unit 01). In the embodiments of this application, the number of first anchor units 02 is at least two, for example, the number of first anchor units 02 is 3 to 16, specifically 5, 7, 9, 11 or 13, preferably, the number of first anchor units 02 is 8.

[0037] Optionally, the second anchor 26 includes a second inlet segment 18, a second outlet segment 23, and a second connecting segment 20. The second inlet segment 18, the second connecting segment 20, and the second outlet segment 23 are sequentially connected to form a U-shaped structure, and the second suture segment 27 passes through the second inlet segment 18 and the second outlet segment 23. In this way, the path of the second suture segment 27 on the second anchor 26 is constrained by the U-shaped structure. When the second traction end 36 is subjected to tension, the force distribution of the second suture segment 27 on both sides of the U-shaped structure is relatively uniform, which is conducive to the second suture segment 27 forming a winding lock on the second anchor 26. At the same time, both the first anchor 15 and the second anchor 26 adopt a U-shaped structure, and their structural forms are consistent, which is conducive to maintaining the consistency of the force mode of each anchor unit during continuous implantation, thereby helping to reduce the operational complexity caused by the structural differences of each anchor unit.

[0038] Optionally, a first cavity 28 is provided within the second anchor 26. The first cavity 28 sequentially passes through the second inlet segment 18, the second connecting segment 20, and the second outlet segment 23. The second seam segment 27 includes a mating segment 21 located within the first cavity 28, with the inner wall of the first cavity 28 fitting against the mating segment 21. Thus, when the second pulling end 36 is subjected to tension, the mating segment 21 tends to move along the extension direction of the first cavity 28. At this time, friction is generated between the outer wall of the mating segment 21 and the inner wall of the first cavity 28. The direction of this friction is opposite to the direction of the moving tendency of the mating segment 21, so that the friction creates resistance to the movement of the mating segment 21. This requires the second seam segment 27 to overcome this resistance to generate relative displacement during the stress process, which is beneficial for the second seam segment 27 to be securely fixed to the second anchor 26.

[0039] like Figure 3As shown, optionally, the second thread entry segment 18 is provided with a second front thread entry hole 25 and a second rear thread entry hole 19, the second front thread entry hole 25 being located near the opening of the U-shaped structure, and the second rear thread entry hole 19 being located near the second connecting segment 20; the second thread exit segment 23 is provided with a second front thread exit hole 24 and a second rear thread exit hole 22, the second front thread exit hole 24 being located near the opening of the U-shaped structure, and the second rear thread exit hole 22 being located near the second connecting segment 20; the second thread segment 27 sequentially passes through the second front thread entry hole 25 from the inside to the outside of the U-shaped structure, passes through the second rear thread entry hole 19 from the outside of the U-shaped structure and enters the first cavity 28, passes through the second rear thread exit hole 22 from the inside to the outside of the U-shaped structure through the first cavity 28 and passes through the second front thread exit hole 24 from the outside to the inside of the U-shaped structure, and the second connecting end 35 is connected to the second pulling end 36 on the inner side of the U-shaped structure. Through the cooperation of the aforementioned thread hole and the first cavity 28, the thread path of the second thread segment 27 passes sequentially through the second thread entry segment 18, the first cavity 28, and the second thread exit segment 23, forming a continuous thread channel penetrating the second anchor 26. The arrangement of the second front thread entry hole 25 and the second front thread exit hole 24 close to the opening of the U-shaped structure ensures that both the entry and exit ends of the second thread segment 27 are located on the opening side of the U-shaped structure, which is beneficial for the second connecting end 35 and the second pulling end 36 to be connected inside the U-shaped structure; moreover, the second rear thread entry hole 19 and the second rear thread exit hole 22 are close to The arrangement of the second connecting section 20 ensures that the path of the second stitch segment 27 within the first cavity 28 covers the bottom area of ​​the U-shaped structure, which helps to increase the contact range between the second stitch segment 27 and the second anchor 26. Simultaneously, when the second pulling end 36 is subjected to tension, the second stitch segment 27 moves along the thread hole path, and the edges of each thread hole apply constraint forces of different directions to the second stitch segment 27, causing friction to accumulate at each turning point of the thread path. The accumulated friction helps to lock the second stitch segment 27 to the second anchor 26.

[0040] like Figure 4As shown, optionally, the second pulling end 36 is provided with a second cavity 32, and the second connecting end 35 is provided with a third cavity 31. The second pulling end 36 is provided with a first mating hole 34, a second mating hole 33, and a third mating hole 29 arranged sequentially in the direction away from the second anchor 26. The second connecting end 35 is provided with a fourth mating hole 37 and a fifth mating hole 30 arranged sequentially in the direction away from the second anchor 26. The second connecting end 35 enters the second cavity 32 through the first mating hole 34 and exits the second cavity 32 through the second mating hole 33. The second pulling end 36 enters the third cavity 31 through the fourth mating hole 37 and exits the third cavity 31 through the fifth mating hole 30. The second connecting end 35 then enters the second cavity 32 through the third mating hole 29. A portion of the second connecting end 35 is located inside the second cavity 32, and a portion of the second pulling end 36 is located inside the third cavity 31, forming a cross-entwined relationship where the second connecting end 35 and the second pulling end 36 penetrate each other's cavities. The reciprocating path of the second connecting end 35 within the second cavity 32 creates multiple contact areas between the second connecting end 35 and the second pulling end 36 within the second cavity 32 and the third cavity 31. Each contact area generates frictional forces in different directions when subjected to force. When the second pulling end 36 is subjected to tension, the second connecting end 35 tends to move relative to the second pulling end 36. The direction of the frictional force in each contact area is opposite to the direction of this movement trend, thus restricting the relative movement between the second connecting end 35 and the second pulling end 36 by multi-directional frictional resistance. Simultaneously, the structural arrangement of the second connecting end 35 re-entering the second cavity 32 through the third mating hole 29 further increases the number of frictional contact points between the second connecting end 35 and the second pulling end 36, which is beneficial to improving the stability of the connection state between the second connecting end 35 and the second pulling end 36.

[0041] Preferably, in this embodiment of the application, the U-shaped structure of the first anchor 15 and the second anchor 26 is formed by symmetrically bending the braided segments. The bent U-shaped structure has elastic recovery force and can form an elastic fit with the bone tunnel wall after implantation. Specifically, the first anchor 15 and the second anchor 26 are tubular braids made of medical-grade ultra-high molecular weight polyethylene fibers or polyester fibers. The braided structure has axially extending cavities inside and microscopic gaps between the braided fibers, so that the suture can penetrate into the braided structure and form a frictional fit with the braided fibers.

[0042] Another aspect of this application provides an anchor implantation system, including the anchor assembly provided in the embodiments of this application.

[0043] The anchor implantation system provided in this application utilizes the anchor assembly provided in this application. Compared to the existing serial multi-anchor structure which uses independent locking thread knots to achieve suture locking, the first suture segment 17 in this application forms a locking knot by wrapping itself. The first suture segment 17 has the dual function of connecting adjacent anchor units and binding the first anchor 15. During continuous implantation, when the first pulling end 13 is subjected to the pulling force generated when the subsequent first anchor unit 02 is implanted, this pulling force also acts on the formation of the locking knot. The locking state of the locking knot is consistent with the direction of the pulling force. Therefore, the degree of disturbance to the locking knot caused by the subsequent anchor unit implantation operation is lower than the degree of disturbance caused by the independent locking thread structure in the prior art. This helps to reduce the risk of the locking structure loosening during continuous implantation, thereby helping to maintain the stability of the suture tension between each anchor unit. At the same time, since there is no need to set up an independent locking thread structure, the overall structure of the anchor assembly is simplified, which helps to reduce manufacturing costs and assembly complexity.

[0044] like Figures 5a to 5d As shown in the example, the anchor component provided in this application is used as follows: First, the second anchor unit 01 is implanted. Then, the first anchor 15 of the first first anchor unit 02 (i.e., the first anchor unit 02 closest to the second anchor unit 01 on the same suture line) is implanted. Because the first anchor unit 02 is equipped with a reserved suture loop 04, during the implantation of the first anchor 15, especially at the moment of implantation, the suture length between the first anchor 15 and the already implanted second anchor 26 can adaptively increase as the distance between them increases, so that the movement of the first anchor 15 will not cause a large pulling force on the second anchor 26; after the first first anchor 15 is implanted, the reserved suture loop 04 is pulled (e.g., ... Figure 5a As shown), tighten the seam between the second anchor 26 and the first anchor 15, and then pull the first pull end 13 on the first anchor unit 02 (as shown). Figure 5b and Figure 5c As shown), the prefabricated knot 11 gradually contracts towards the inner side of the U-shaped structure of the first anchor 15 (as shown). Figure 5d(As shown) until the locking knot is formed, completing the implantation of the first anchor unit 02. Then, the first anchor 15 of the second first anchor unit 02 (i.e., the first anchor unit 02 closest to the first first anchor unit 02 on the same suture line) is implanted. The reserved loop 04 of the second first anchor unit 02 serves to accommodate the change in distance between the two first anchor units 15 due to the movement of the second first anchor unit 15, thereby reducing the impact on the first first anchor unit 02 during the implantation of the second first anchor unit 02. After the second first anchor unit 15 is implanted, the reserved loop 04 is pulled to tighten the suture between the first and second first anchor units 15. Then, the first pulling end 13 on the second first anchor unit 02 is pulled, causing the prefabricated knot 11 to gradually shrink towards the inside of the U-shaped structure of the second first anchor unit 15 until the locking knot is formed, completing the implantation of the second first anchor unit 02. This process is repeated to implant each first anchor unit 02 one by one. In this way, a pre-made knot 11 is formed by wrapping the suture around the anchor. Through subsequent tightening, the suture locks itself. Compared with the existing technology, where the suture and the locking suture are independent structures, this achieves "true locking," avoiding slippage of the individual locking structure and simplifying the single structure of the all-suture multi-anchor implant. This facilitates the continuous structure of the all-suture multi-anchor implant. Because the pre-made knot 11 has fixed the previously implanted anchor, the subsequent anchor pulling the suture will not affect the state of the already implanted anchor. This allows the suture tension between the anchors to be adjusted according to needs, thereby adjusting the force of soft tissue fixation to the bone surface, achieving precise control, better fixation effect, and greater stability.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An anchor assembly, characterized in that, The system includes multiple first anchor units, each comprising a first anchor and a first thread segment wound around it. One end of the first thread segment is a first pull end for connecting to an adjacent first anchor unit. This pull end, when pulled, causes the thread segment to wind itself into a locking knot, thereby binding it to the first anchor. The first anchor includes a first inlet segment, a first outlet segment, and a first connecting segment. These segments are sequentially connected to form a U-shaped structure. The first thread segment passes through the inlet and outlet segments so that the locking knot is located between them. The inlet segment has a first front inlet hole and a first rear inlet hole. The front inlet hole is located near the opening of the U-shaped structure, and the rear inlet hole is located near the first connecting segment. The first outlet segment... The first thread segment is provided with a first front thread outlet hole and a first rear thread outlet hole. The first front thread outlet hole is located near the opening of the U-shaped structure, and the first rear thread outlet hole is located near the first connecting segment. The first thread segment passes through the first front thread inlet hole from the inside to the outside of the U-shaped structure, through the first rear thread inlet hole from the outside to the inside of the U-shaped structure, through the first rear thread outlet hole from the inside to the outside of the U-shaped structure, and through the first front thread outlet hole from the outside to the inside of the U-shaped structure. The first pulling end is located at the part of the first thread segment that extends out of the first front thread outlet hole. The first thread segment includes a transition section located between the first front thread inlet hole and the first rear thread inlet hole. After passing through the first rear thread outlet hole, the first thread segment passes through the transition section and the first thread inlet hole to form a reserved thread loop between the transition section and the first rear thread outlet hole. The first thread segment then passes through the reserved thread loop and the first front thread outlet hole in sequence.

2. The anchor assembly according to claim 1, characterized in that, The other end of the first suture segment is a first connecting end. The anchor assembly also includes a second anchor unit, which includes a second anchor and a second suture segment wrapped around the second anchor. One end of the second suture segment is a second pulling end, and the other end of the second suture segment is a second connecting end. The second pulling end is fixedly connected to the second connecting end, and the second pulling end is connected to the first connecting end.

3. The anchor assembly according to claim 2, characterized in that, The second anchor includes a second inlet segment, a second outlet segment, and a second connecting segment. The second inlet segment, the second connecting segment, and the second outlet segment are connected in sequence to form a U-shaped structure. The second stitch segment passes through the second inlet segment and the second outlet segment.

4. The anchor assembly according to claim 3, characterized in that, A first cavity is provided inside the second anchor, through which a second inlet section, a second connecting section, and a second outlet section are sequentially passed. The second suture section includes a mating section located inside the first cavity, and the inner wall of the first cavity is fitted with the mating section.

5. The anchor assembly according to claim 4, characterized in that, The second thread entry segment is provided with a second front thread entry hole and a second rear thread entry hole. The second front thread entry hole is located near the opening of the U-shaped structure, and the second rear thread entry hole is located near the second connecting segment. The second thread exit segment is provided with a second front thread exit hole and a second rear thread exit hole. The second front thread exit hole is located near the opening of the U-shaped structure, and the second rear thread exit hole is located near the second connecting segment. The second suture segment sequentially passes through the second front thread entry hole from the inside to the outside of the U-shaped structure, passes through the second rear thread entry hole from the outside to the inside of the U-shaped structure and enters the first cavity, passes through the second rear thread exit hole from the inside to the outside of the U-shaped structure and passes through the second front thread exit hole from the outside to the inside of the U-shaped structure. The second connecting end is connected to the second pulling end on the inner side of the U-shaped structure.

6. The anchor assembly according to claim 2, characterized in that, The second pulling end has a second cavity, and the second connecting end has a third cavity. The second pulling end has a first mating hole, a second mating hole, and a third mating hole arranged sequentially in the direction away from the second anchor. The second connecting end has a fourth mating hole and a fifth mating hole arranged sequentially in the direction away from the second anchor. The second connecting end enters the second cavity through the first mating hole and exits the second cavity through the second mating hole. The second pulling end enters the third cavity through the fourth mating hole and exits the third cavity through the fifth mating hole. The second connecting end then enters the second cavity through the third mating hole.

7. An anchor implantation system, characterized in that, Includes the anchor assembly as described in any one of claims 1 to 6.

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