Multi-nail-body full-suture anchor and processing method thereof

Abstract

The invention relates to a multi-nail-body full-suture anchor and a processing method thereof, and belongs to the technical field of orthopedic fixing implants. The nail body is formed by a woven suture and comprises a first nail body part, a second nail body part, a third nail body part and a fourth nail body part; the sewing thread is of a hollow structure and comprises an adjustable coil and a traction part, the adjustable coil comprises two ring sleeves which are formed by a channel structure formed by the sewing thread penetrating through the hollow structure of the adjustable coil, and a movable traction point is arranged between the two ring sleeves. Four suture sections extending from a movable traction point of the adjustable coil respectively penetrate through the first nail body part, the second nail body part, the third nail body part and the fourth nail body part; and the traction part is used for adjusting the length of the adjustable coil. Through the multi-bus staggered friction and self-locking design, the suture is pulled tighter and tighter when being stressed, and postoperative loosening or slipping is avoided.

Description

Technical Field

[0001] This invention relates to the field of orthopedic fixation implant technology, specifically a multi-nail full-suture anchor and its processing method. Background Technology

[0002] Suture anchors utilize the braided properties of the suture itself to replace traditional rigid nails, thereby reducing bone tissue damage and increasing frictional fixation. However, existing suture anchors have limited stability after tightening, making it difficult to maintain stable fixation strength and displacement under prolonged stress cycles.

[0003] Based on this, a multi-nail fully sewn anchor and its processing method are proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-needle fully sewn anchor and its processing method, which solves the problem that fully sewn anchors are difficult to maintain fixed strength and stable displacement under long-term stress cycles after tightening.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] A multi-needle fully threaded anchor, comprising thread and nail body;

[0007] The nail body is formed by braided stitching and includes a first nail body portion, a second nail body portion, a third nail body portion, and a fourth nail body portion;

[0008] The suture is a hollow structure suture, including an adjustable loop and a traction section.

[0009] An adjustable coil includes a hollow structure through which the suture passes to form a channel structure, forming two loops. A movable traction point is provided between the two loops. Four suture segments extending from the movable traction point of the adjustable coil pass through the first nail body, the second nail body, the third nail body, and the fourth nail body, respectively.

[0010] The traction unit is used to adjust the length of the adjustable coil.

[0011] Beneficial effects:

[0012] 1. Through the interlacing friction of multiple sutures and the self-locking design, the sutures become tighter and tighter under stress, preventing loosening or slippage after surgery.

[0013] 2. In some embodiments, the four nails form an approximately cylindrical structure after the suture shrinks, which can form an annular contact with the bone hole, thereby improving the overall fixation force and reducing the risk of bone fracture caused by local stress concentration.

[0014] 3. It adopts a double-nail body, a four-nail body, or a strip / strip structure, which can balance processing efficiency and meet the requirements of high-strength fixation, and is suitable for a variety of clinical application scenarios.

[0015] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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 drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this disclosure;

[0018] Figure 2 : This is a schematic diagram of the double-nail structure according to an embodiment of this disclosure;

[0019] Figure 3 This is a schematic diagram of the four-nail structure according to an embodiment of this disclosure;

[0020] Figure 4 : Schematic diagram of self-locking of the active traction point in an embodiment of this disclosure. Figure 1 ;

[0021] Figure 5 : Schematic diagram of self-locking of the active traction point in an embodiment of this disclosure. Figure 2 ;

[0022] Figure 6 This is a schematic diagram of the threading process for the four nails in an embodiment of this disclosure.

[0023] Figure 7 This is a schematic diagram of the threading process for the four nails in an embodiment of this disclosure. Figure 2 ;

[0024] Figure 8 This is a schematic diagram of the threading process for the double-nail body according to an embodiment of this disclosure;

[0025] Figure 9 This is a schematic diagram of the single-nail threading process in an embodiment of this disclosure.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] In the diagram: 1-nail body; 1a-first nail body; 1b-second nail body; C1-first nail body section; C2-second nail body section; C3-third nail body section; C4-fourth nail body section; 2-seam; 201-first anchor nail section; 202-second anchor nail section; 203-third anchor nail section; 204-fourth anchor nail section; 20-adjustable coil; 20a-first ring; 20b-second ring; 200-movable traction point; T1-first channel; T2-second channel; T3-third channel. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The purpose of this invention is to overcome the problems of insufficient fixing force and poor displacement stability after long-term use of existing full-suture anchors. To achieve the above objective, this invention provides a multi-nail full-suture anchor, comprising a suture and a nail body;

[0030] The nail body is made of braided thread, and the nail body includes four nail body parts;

[0031] The suture is a hollow structure suture, including an adjustable loop and a traction section.

[0032] Adjustable coil 20, the adjustable coil 20 is passed through the nail body;

[0033] The adjustable coil 20 includes a hollow structure through which the stitches pass to form a channel structure, thus forming two loops that are mutually attracted to each other.

[0034] The traction unit is used to adjust the length of the adjustable coil 20.

[0035] When using it, insert the nail into the fixing hole, and the adjustable coil length is contracted by the traction of the sewing thread, so that the nail shrinks into a ball and comes into contact with the inside of the fixing hole to complete the fixation.

[0036] It is understandable that the connection method between the adjustable coil 20 and the nail body is related to the braided structure of the nail body;

[0037] When the nail body is made of flat braided stitching, adjustable loops are interlaced and run through the nail body;

[0038] When the nail body is a hollow braided thread, the adjustable coil 20 passes through the hollow structure.

[0039] The specific structure of this disclosure can be as follows: Figure 1As shown, in some disclosed embodiments, a fully sutured anchor includes a suture and an anchor body, wherein the anchor body includes a first anchor body portion C1, a second anchor body portion C2, a third anchor body portion C3, and a fourth anchor body portion C4;

[0040] The suture includes a first anchor segment 201, a second anchor segment 202, a third anchor segment 203, and a fourth anchor segment 204;

[0041] The first anchor segment 201, the second anchor segment 202, the third anchor segment 203, and the fourth anchor segment 204 form two rings, and a movable traction point 200 is provided between the two rings;

[0042] The active traction point 200 can be implemented in one of the following ways;

[0043] 1) Set independent suture loops, with both loops interlocking with the suture loops;

[0044] 2) The two rings are interlocked;

[0045] 3) The stitching of one of the rings passes through the hollow structure of the other ring to form an active channel.

[0046] It should be explained that the purpose of setting the active traction point 200 is to achieve self-locking, as shown in the reference. Figure 4 , Figure 5 As shown, the adjustable coil 20 includes a first ring 20a and a second ring 20b. When one of the rings of the adjustable coil 20 tends to lengthen, the two rings can be simultaneously subjected to traction force through the setting of the movable traction point 200. This allows the channel structure of the two rings to be locked by the force of the busbar. It should be understood that the stitch segment that passes through its own hollow structure is the busbar.

[0047] It is understood that the first nail body C1, the second nail body C2, the third nail body C3, and the fourth nail body C4 can be four nail bodies that are set separately.

[0048] Of course, the four nail parts can also be in pairs, connected end to end, such as the first nail part C1 and the third nail part C3 forming a long strip;

[0049] Furthermore, the ends of the first nail body C1, the second nail body C2, the third nail body C3, and the fourth nail body C4 near the movable traction point 200 are all connected to each other in a cross shape.

[0050] Different nail body configurations affect processing difficulty and fixing strength; when the nail body is an independent four-segment, the threading process is simpler, the processing process is relatively simplified, and the processing efficiency is higher; when the nail body is a whole woven strip, the processing time increases.

[0051] When the nail body is a single woven strip, it can form multiple points of support after shrinkage, resulting in strong integrity, a larger friction area with the bone hole wall, and higher fixation strength. Although split nail bodies are easier to process, their integrity is slightly worse and their fixation strength is slightly lower.

[0052] Therefore, a choice can be made between processing efficiency and fixation strength based on specific clinical needs.

[0053] Understandably, the first nail body C1, the second nail body C2, the third nail body C3, and the fourth nail body C4 can form an approximately cylindrical integral structure after the suture contracts and clumps together. This structure allows the nail body to form a ring-shaped contact within the bone hole, ensuring overall contact force with the bone hole wall, thereby improving the fixation effect. Simultaneously, the cylindrical contact avoids excessive concentration of contact points, reducing the risk of fracture due to localized stress concentration in the bone hole, and improving the long-term stability and safety of the implant.

[0054] Furthermore, the nail body and suture material are high-strength absorbable or non-absorbable medical sutures, which can ensure mechanical strength while taking into account tissue compatibility.

[0055] In some implementations, the nail body is a double-nail body with flat braided stitching, specifically as follows: Figure 2 , Figure 8 As shown, a fully sewn anchor includes a sewn thread 2 and a first anchor body 1a and a second anchor body 1b;

[0056] The adjustable coil 20 of the suture 2 includes two loops, and a movable traction point 200 is provided between the two loops. The suture segments of the loops pass through the first nail body 1a and the second nail body 1b in sequence.

[0057] Specifically, as shown in Figure 8, the specific threading process of the embodiment is as follows:

[0058] S1; Fold the suture 2 in half to divide the first nail body 1a into the first nail body part C1 and the second nail body part C2, and the second nail body 1b into the third nail body part C3 and the fourth nail body part C4;

[0059] S2; Pass the suture A end through the first nail body C1 in a back-and-forth manner;

[0060] S3; The suture A end is threaded through the third nail body C3 in a back-and-forth manner. The suture A end passes through the hollow channel of the suture 2 to complete the establishment of the first channel T1, forming the first ring 20a; The first nail body C1 and the third nail body C3 are located inside the first ring 20a;

[0061] S4; Pass the end of the suture B through the second nail body C2 in a back-and-forth manner;

[0062] S5; After passing the B end of the suture through the first loop 20a, thread it through the fourth nail body C4 in a back-and-forth manner;

[0063] S6; Pass the B end of the suture through the hollow channel of the suture 2 to complete the establishment of the second channel T2, forming the second ring 20b; The second nail body C2 and the fourth nail body C4 are located inside the second ring 20b.

[0064] Understandably, when the above-mentioned anchor is working, the anchor body is first placed in the pre-set fixing hole by the full-seam anchor inserter. The cross-section of the full-seam anchor inserter abuts against the anchor body. The adjustable coil 20 is tightened by pulling the A end and B end of the seam. The tightening of the adjustable coil 20 drives the anchor body to clump together to complete the fixation of the full-seam anchor.

[0065] The stress scenario after implantation of the full suture anchor is as follows: the suture will be continuously stressed and relaxed with the movement of the patient's joint. It should be understood that when the suture is stressed, the anchor body tends to contract and clump together, while when the suture is relaxed, the stress decreases. This may cause the full suture anchor to loosen and cause excessive displacement. This disclosure ensures that the adjustable coil 20 remains stable under stress changes after tightening by setting the friction of the first channel T1 and the second channel T2.

[0066] Furthermore, a movable traction point 200 is provided between the first ring 20a and the second ring 20b; when the adjustable coil 20 is tightened, the mutual traction of the first ring 20a and the second ring 20b will cause the busbar formed by the other channel to contract, increasing its friction and completing unidirectional locking.

[0067] The specific threading parameters are as follows: from one end of the first nail body 1a or the second nail body 1b to its center point K5, there are four threading points K1, K2, K3, and K4 in sequence. The angle at which the thread 2 enters the nail body from the threading point is 20 degrees. The distance between point K1 and the end face of the nail body is L1, the distance between point K1 and point K2 is L2, the distance between point K2 and point K3 is L3, the distance between point K3 and point K4 is L4, and the distance between K4 on both sides of the center point K5 is L5. The ratio of distances L1:L2:L3:L4:L5 is 2:3:2:3:2. In some embodiments, the overall length of the nail body is 12 to 36 mm.

[0068] In some embodiments, the angle at which the suture 2 enters the nail body 1 from the threading point is 60 degrees, and the distance ratio of L1:L2:L3:L4:L5 is 2:5:2:5:3.

[0069] Furthermore, step S5 can be as follows: The B end of the suture is passed through the hollow structure of the suture segment of the first loop 20a to form a channel, and then passed through the fourth nail body C4 in a reciprocating manner. This design increases the friction of the loop and improves locking stability.

[0070] In some implementations, the nail body is a four-nail flat braided stitch, specifically as follows: Figure 3 , Figure 6 As shown, a fully sewn anchor includes a sewn thread and an anchor body;

[0071] The nail body includes four independent nail bodies: a first nail body portion C1, a second nail body portion C2, a third nail body portion C3, and a fourth nail body portion C4.

[0072] The adjustable coil 20 of the suture includes two loops, and a movable traction point 200 is provided between the two loops. The suture segments of the loops pass through the first nail body C1, the second nail body C2, the third nail body C3, and the fourth nail body C4 in sequence.

[0073] Specifically, as shown in Figure 6, the specific threading process of the embodiment is as follows:

[0074] S1; Fold the sewing thread 2 in half to divide the nail into a first nail body C1, a second nail body C2, a third nail body C3, and a fourth nail body C4;

[0075] S2; Pass the suture A end through the first nail body C1 and the second nail body C2 in a back-and-forth manner;

[0076] S3; Pass the end of the suture A through the hollow channel of the suture 2 to complete the establishment of the first channel T1, forming the first ring 20a; The first nail body C1 and the third nail body C2 are located inside the first ring 20a;

[0077] S4; Pass the B end of the suture through the third nail body C3 and the fourth nail body C4 in a back-and-forth manner;

[0078] S5; After passing the B end of the suture through the first loop 20a, pass the B end of the suture through the hollow channel of the suture 2 to complete the establishment of the second channel T2, forming the second loop 20b; The third nail body C3 and the fourth nail body C4 are located inside the second loop 20b.

[0079] In some implementations, the nail body is a four-nail flat braided stitch, specifically as follows: Figure 3 As shown, a fully sewn anchor includes a sewn thread and an anchor body;

[0080] The nail body includes four independent nail bodies: a first nail body portion C1, a second nail body portion C2, a third nail body portion C3, and a fourth nail body portion C4.

[0081] The adjustable coil 20 of the suture includes two loops, with a movable traction point 200 between the two loops. The suture segments of the loops sequentially pass through the first nail body C1, the second nail body C2, the third nail body C3, and the fourth nail body C4. The movable traction point 200 is established by the suture 2 passing through its own hollow channel.

[0082] Specifically, such as Figure 7 As shown, the specific threading process of the embodiment is as follows:

[0083] S1; Fold the sewing thread 2 in half to divide the nail into a first nail body C1, a second nail body C2, a third nail body C3, and a fourth nail body C4;

[0084] S2; The A end of the suture is threaded through the first nail body C1 and the second nail body C2 in a back-and-forth manner;

[0085] S3; Pass the end of the suture A through the hollow channel of the suture 2 to complete the establishment of the first channel T1, forming the first ring 20a; The first nail body C1 and the second nail body C2 are located inside the first ring 20a;

[0086] S4; Pass the end of the suture B through the third nail body C3 using a back-and-forth through-through method;

[0087] S5; The third channel T3 is formed from the hollow structure of a section of the suture B of the first loop 20a, and the third channel T3 is located between the first nail body C1 and the second nail body C2;

[0088] S6; Pass the end of the suture B through the fourth nail body C4 using a back-and-forth through-through method;

[0089] S7; Pass the end of the suture B through the hollow channel of the suture 2 to complete the establishment of the second channel T2, forming the second ring 20b; The third nail body C3 and the fourth nail body C4 are located inside the second ring 20b.

[0090] In some implementations, the nail body is a flat braided stitch, specifically as follows: Figure 9 As shown, a fully sewn anchor includes a sewn thread and an anchor body;

[0091] The nail body includes a first nail body portion C1, a second nail body portion C2, a third nail body portion C3, and a fourth nail body portion C4; the first nail body portion C1, the second nail body portion C2, the third nail body portion C3, and the fourth nail body portion C4 are integrally formed and are cross-shaped.

[0092] The adjustable coil 20 of the suture includes two loops, and a movable traction point 200 is provided between the two loops. The suture segments of the loops pass through the first nail body C1, the second nail body C2, the third nail body C3, and the fourth nail body C4 in sequence.

[0093] Specifically, such as Figure 9 As shown, the specific threading process of the embodiment is as follows:

[0094] S1; 2 folds of the stitching;

[0095] S2; Pass the suture A end through the second nail body C2 and the first nail body C1 in a back-and-forth manner;

[0096] S3; Pass the end of the suture A through the hollow channel of the suture 2 to complete the establishment of the first channel T1, forming the first ring 20a; The first nail body C1 and the third nail body C2 are located inside the first ring 20a;

[0097] S4; Pass the B end of the suture through the fourth nail body C4 in a back-and-forth manner, then pass the B end of the suture through the suture hollow channel between the first nail body C1 and the third nail body C2; finally pass it through the third nail body C3.

[0098] S5; The B end of the suture is passed through the hollow channel of the suture 2 to complete the establishment of the second channel T2, forming the second ring 20b; The third nail body C3 and the fourth nail body C4 are located inside the second ring 20b.

[0099] Furthermore, the above-mentioned nail body is a flat braided stitch, and the first loop 20a and the second loop 20b can be interlocked by loops. The specific processing steps are as follows;

[0100] S1; 2 folds of the stitching;

[0101] S2; Pass the suture A end through the second nail body C2 and the third nail body C3 in a back-and-forth manner;

[0102] S3; Pass the end of the suture A through the hollow channel of the suture 2 to complete the establishment of the first channel T1, forming the first ring 20a; The first nail body C1 and the third nail body C2 are located inside the first ring 20a;

[0103] S4; Pass the B end of the suture thread through the fourth nail body C4 in a back-and-forth manner, then pass the B end of the suture thread through the first loop 20a, and then pass the B end of the suture thread through the first nail body C1.

[0104] S5; The B end of the suture is passed through the hollow channel of the suture 2 to complete the establishment of the second channel T2, forming the second ring 20b; The third nail body C3 and the fourth nail body C4 are located inside the second ring 20b.

[0105] It is understandable that the relative positions of the first nail body C1, the second nail body C2, the third nail body C3, and the fourth nail body C4 can be found in the attached diagram. Figure 9 .

[0106] It is understandable that the above-mentioned specific processing procedure also applies to braided sewing thread with hollow anchor structure. The difference is that the sewing thread segment of the adjustable coil 20 can directly pass through the hollow structure of the nail body during the threading process, thereby reducing the external back-and-forth threading process, making the threading path smoother, and at the same time increasing the frictional contact area between the sewing thread and the nail body, improving the locking effect and overall fixation stability.

[0107] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0108] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-dwelling all-suture anchor, characterized by, The suture and the nail body; The nail body is formed by braided suture, including first nail body part, second nail body part, third nail body part and fourth nail body part; The suture is hollow structure, including adjustable coil and traction part, The adjustable coil includes hollow structure of suture through itself to form channel structure, forming two loops, and the movable traction point between the two loops, the four suture segments of the movable traction point of the adjustable coil are respectively threaded in the first nail body part, the second nail body part, the third nail body part and the fourth nail body part; The traction part is used for adjusting the length of the adjustable coil.

2. A multi-dwelling all-suture anchor according to claim 1, wherein, The movable traction point is the movable channel formed by the mutual buckling of the two loops or the suture of one loop through the hollow structure of the other loop.

3. A multi-dwelling all-suture anchor according to claim 1, wherein, The connection mode of the adjustable coil and the nail body is adapted to the braided structure of the nail body, wherein: When the nail body is flat braided suture, the adjustable coil is staggered through the nail body; When the nail body is hollow braided suture, the adjustable coil is threaded into and out of the hollow structure of the nail body.

4. A multi-dwelling all-suture anchor according to claim 1, wherein, The first nail body part, the second nail body part, the third nail body part and the fourth nail body part are four separate nail bodies.

5. A multi-dwelling full suture anchor according to claim 1, wherein, The first nail body part, the second nail body part, the third nail body part and the fourth nail body part are connected in a group by group to form the first nail body and the second nail body.

6. A multi-dwelling all-suture anchor according to claim 1, wherein, The nail body is integrally provided, and the first nail body part, the second nail body part, the third nail body part and the fourth nail body part are connected to each other at one end near the movable traction point, forming a cross-shaped structure.

7. A multi-dwelling full suture anchor according to claim 4, wherein, The processing method of the nail body as flat suture includes the following steps: S1, fold the suture; S2, thread the suture A end on the first nail body part and the second nail body part in turn by using the back-and-forth threading mode; S3, thread the suture A end through the hollow channel of the suture to complete the establishment of the first channel, forming the first loop; the first nail body part and the third nail body part are located in the first loop; S4, thread the suture B end on the third nail body part and the fourth nail body part in turn by using the back-and-forth threading mode; S5, thread the suture B end through the first loop, and then thread the suture B end through the hollow channel of the suture to complete the establishment of the second channel, forming the second loop; the third nail body part and the fourth nail body part are located in the second loop.

8. A multi-dwelling full suture anchor according to claim 5, wherein, The processing method of the nail body as flat suture includes the following steps: S1, fold the suture, divide the first nail body into the first nail body part and the second nail body part, and divide the second nail body into the third nail body part and the fourth nail body part; S2, thread the suture A end on the first nail body part by using the back-and-forth threading mode; S3, thread the suture A end on the third nail body part by using the back-and-forth threading mode, thread the suture A end through the hollow channel of the suture to complete the establishment of the first channel, forming the first loop; the first nail body part and the third nail body part are located in the first loop; S4, thread the suture B end on the second nail body part by using the back-and-forth threading mode; S5, thread the suture B end on the fourth nail body part by using the back-and-forth threading mode after threading the suture B end through the first loop; S6, thread the suture B end through the hollow channel of the suture to complete the establishment of the second channel, forming the second loop; the second nail body part and the fourth nail body part are located in the second loop.

9. A multi-dwelling full suture anchor according to claim 6, wherein, The nail body is a flat suture, the first nail body part, the second nail body part, the third nail body part and the fourth nail body part are integrally arranged, and the whole is a cross shape, and the processing method comprises the following steps: S1, fold the suture in half; S2, the A end of the suture is sequentially threaded on the second nail body part and the third nail body part in a back-and-forth manner; S3, the A end of the suture is threaded through the hollow channel of the suture itself to complete the establishment of the first channel, and a first loop is formed; the first nail body part and the third nail body part are located in the first loop; S4, the B end of the suture is sequentially threaded on the fourth nail body part in a back-and-forth manner, then the B end of the suture is threaded through the first loop, and then the B end of the suture is threaded on the first nail body part; S5, the B end of the suture is threaded through the hollow channel of the suture itself to complete the establishment of the second channel, and a second loop is formed; the third nail body part and the fourth nail body part are located in the second loop.

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