A suture - attached anchor

Abstract

The present invention discloses a suture - attached anchor, which includes a nail body, a plurality of wire grooves and a plurality of wire holes. All the wire grooves are provided on the outer periphery of the nail body, and any one of the wire holes penetrates the nail body along the radial direction. During the operation, the suture passes through the wire hole, so that the suture enters the main bone along with the nail body. The wire groove squeezes the suture, so that the suture is fixed between the nail body and the main bone by the squeezing force, without knotting the suture for fixation, preventing the suture from loosening due to the wear of the knot, and ensuring the reliable fixation of the suture - attached anchor. The length of the wire hole in the present invention is relatively short, which can reduce the resistance of the bone fluid flowing through the wire hole, shorten the healing time of the free bone and soft tissue. Shortening the length of the wire hole can also effectively reduce the threading difficulty, create conditions for extending the length of the nail body, facilitate increasing the contact area between the nail body and the main bone, and ensure the reliable fixation of the suture - attached anchor. Therefore, the suture - attached anchor provided by the present invention has more reliable fixation and faster repair speed.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a suture - threaded anchor Background Art

[0002] When a patient has a fracture, ligament detachment or ligament rupture, it is necessary to use surgery to reduce the free bone or soft tissue, then use a nail pusher to drive the suture - threaded anchor into the main bone, and finally use a suture to re - fix the free bone or soft tissue on the main bone. This application is relatively common. Existing suture - threaded anchors usually have threading holes for connecting sutures. However, there are still many unreasonable aspects in the existing setting methods of the threading holes.

[0003] First, the threading holes of some existing suture - threaded anchors are specifically open - type grooves provided at the tail of the nail body, and a card - wire groove communicating therewith is provided at the opening of the threading hole. During the operation, after the suture passes through the threading hole, the two ends of the suture are respectively embedded in the card - wire groove, and then the two ends of the suture are passed through the free bone or soft tissue and knotted, so that the free bone or soft tissue is fixed on the surface of the main bone. When using such threading holes, knotting is required. The suture knots exposed on the outer surface of the main bone are extremely likely to cause the suture - threaded anchor to be fixed insecurely due to frequent friction.

[0004] Second, the threading holes of some existing suture - threaded anchors are specifically through - holes that penetrate the nail body along the axial direction of the nail body, resulting in too long threading holes, difficult threading, and relatively large resistance for bone fluid to flow through the threading holes, affecting the growth rate and healing time of free bone and soft tissue, and the repair period is relatively long.

[0005] Therefore, how to optimize the structure of the existing suture - threaded anchor to make its fixation more reliable and the repair speed faster is a technical problem that those skilled in the art need to solve urgently. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a suture - threaded anchor, in which a plurality of threading holes extend radially, avoiding suture knotting, and capable of shortening the length of the threading holes, so the fixation is more reliable and the repair speed is faster.

[0007] The specific scheme is as follows:

[0008] The present invention provides a suture - threaded anchor, including:

[0009] A nail body;

[0010] A plurality of pressure - wire grooves provided on the outer periphery of the nail body for accommodating the suture and fixing the suture between the nail body and the main bone;

[0011] Threading holes that penetrate the nail body along the radial direction for the suture to pass through.

[0012] Preferably, all the threading holes are arranged in a spiral shape.

[0013] Preferably, the first end of the nail body has a conical nail head for guiding the nail body into the main bone.

[0014] Preferably, several conical wire pressing protrusions with small-diameter ends facing the conical nail head and axially staggered are provided on the outer periphery of the nail body, and any two adjacent conical wire pressing protrusions form a wire pressing groove.

[0015] Preferably, a spiral wire pressing protrusion is provided on the outer periphery of the nail body, and the wire pressing groove is spiral.

[0016] Preferably, the second end of the nail body has a nail connection groove for cooperating and connecting with the nail pusher.

[0017] Preferably, several anti-rotation grooves for preventing the nail body from rotating relative to the main bone are provided on the outer periphery of the nail body.

[0018] Preferably, the anti-rotation grooves are arranged in a spiral pattern.

[0019] Preferably, the length of the anti-rotation groove near the first end of the nail body is greater than the length of the anti-rotation groove near the second end of the nail body.

[0020] Preferably, the length range of the nail body is 10-70 mm.

[0021] Compared with the background art, the suture-anchored nail provided by the present invention includes a nail body, several wire pressing grooves and several threading holes. All the wire pressing grooves are provided on the outer periphery of the nail body, and any threading hole passes through the nail body in the radial direction.

[0022] During the operation, the suture passes through the threading hole, so that the suture enters the main bone along with the nail body. The wire pressing groove squeezes the suture, so that the suture is fixed between the nail body and the main bone by the extrusion force, without knotting and fixing the suture, preventing the suture from loosening due to wear of the knot, and ensuring that the suture-anchored nail is reliably fixed.

[0023] Compared with the threading hole extending axially, the threading hole in the present invention has a shorter length, which can reduce the resistance of the bone fluid flowing through the threading hole, thereby improving the growth rate of the free bone and soft tissue, shortening the healing time of the free bone and soft tissue at the same time, having a short repair time and a fast repair speed.

[0024] Furthermore, shortening the length of the threading hole can also effectively reduce the threading difficulty, create conditions for extending the length of the nail body, facilitate increasing the contact area between the nail body and the main bone, and further ensure that the suture-anchored nail is reliably fixed.

[0025] Therefore, the suture-anchored nail provided by the present invention is more reliably fixed and has a faster repair speed. Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the provided drawings.

[0027] Figure 1 It is a partial sectional structure diagram of the suture - attached anchor provided by the first specific embodiment of the present invention;

[0028] Figure 2 It is a partial sectional structure diagram of the suture - attached anchor provided by the second specific embodiment of the present invention;

[0029] Figure 3 It is a partial sectional structure diagram of the suture - attached anchor provided by the third specific embodiment of the present invention;

[0030] Figure 4 It is a partial sectional structure diagram of the suture - attached anchor provided by the fourth specific embodiment of the present invention;

[0031] Figure 5 It is a usage state diagram of the suture - attached anchor provided by the present invention.

[0032] The reference numerals are as follows:

[0033] Main bone 01 and suture 02;

[0034] Anchor body 1, wire - pressing groove 2, wire - passing hole 3 and anti - rotation groove 4;

[0035] Conical nail head 11 and nail connection groove 12;

[0036] Conical wire - pressing protrusion 21;

[0037] Spiral wire - pressing protrusion 22. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] To enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] An embodiment of the present invention discloses a suture - attached anchor. The key improvement lies in optimizing the structure of the suture - attached anchor, which includes a nail body 1, a plurality of wire - pressing grooves 2, and a plurality of wire - passing holes 3. All the wire - pressing grooves 2 are arranged on the outer periphery of the nail body 1, and any one of the wire - passing holes 3 penetrates the nail body 1 along the radial direction.

[0041] The nail body 1 is preferably cylindrical, with a diameter of 1.5 - 15 mm, and can be made of plastic or metal materials. A conical nail head 11 is provided at the first end of the nail body 1. The conical nail head 11 uses the conical surface to guide the nail body 1 into the main bone 01, which helps to reduce the drilling difficulty of the nail body 1. A nail connection groove 12 is provided at the second end of the nail body 1. The nail connection groove 12 is cooperatively connected with a nail pusher. The nail connection groove 12 can be a threaded groove, so that the nail connection groove 12 is threadedly connected with the nail pusher to ensure that the nail body 1 is stably drilled into the main bone 01. Of course, the cross - section of the nail connection groove 12 can also be triangular, square or regular polygon, which is not specifically limited here.

[0042] On the one hand, the wire - pressing groove 2 can accommodate the suture 02 and fix the suture 02 between the nail body 1 and the main bone 01 by using the extrusion force. On the other hand, the wire - pressing groove 2 can guide the flow of bone fluid, and the bone chips carried by the bone fluid can be deposited in the wire - pressing groove 2, enhancing the connection strength between the nail body 1 and the main bone 01 and improving the anti - pull - out ability.

[0043] The wire - passing hole 3 can be a circular through - hole, an oval through - hole or a rectangular through - hole. To ensure that the nail body 1 has a high bending strength, when the wire - passing hole 3 is a circular through - hole, the diameter of the wire - passing hole 3 is 10% - 70% of the diameter of the nail body 1; when the wire - passing hole 3 is an oval through - hole, the short diameter of the wire - passing hole 3 is 10% - 70% of the diameter of the nail body 1, and its long diameter is 1 - 20 times the diameter of the nail body 1; similarly, when the wire - passing hole 3 is a rectangular through - hole, the width of the wire - passing hole 3 is 10% - 70% of the diameter of the nail body 1, and its length is 1 - 20 times the diameter of the nail body 1; of course, the structure of the wire - passing hole 3 is not limited to this.

[0044] All the wire - passing holes 3 can be arranged in a straight line, which helps to reduce the processing difficulty of the wire - passing holes 3. Preferably, all the wire - passing holes 3 are arranged in a spiral shape to make the nail body 1 have sufficient strength. Of course, all the wire - passing holes 3 can also be arranged in other non - collinear ways.

[0045] It should be added that the axial distance of the wire - passing hole 3 from the tail of the nail body 1 can be set according to the bone density of the patient. The lower the bone density, the greater the axial distance of the wire - passing hole 3 from the tail of the nail body 1. Here, the tail of the nail body 1 specifically refers to the second end of the nail body 1.

[0046] When the number of wire passing holes 3 is large, the suture 02 cannot pass through all the wire passing holes 3, resulting in some wire passing holes 3 being vacant. The vacant wire passing holes 3 facilitate the circulation of intraosseous fluid, contribute to promoting wound healing, and at the same time can enhance the pull-out resistance and anti-rotation force of the nail body 1, ensuring that the nail body 1 is reliably fixed in the main bone 01.

[0047] During the operation, the suture 02 passes through the wire passing hole 3, and the nail body 1 is drilled into the main bone 01 with the suture 02. The wire pressing groove 2 presses the suture 02, so that the suture 02 is fixed between the nail body 1 and the main bone 01 by the extrusion force, without knotting the suture 02, preventing the suture 02 from loosening due to wear of the knot, and ensuring that the suture-anchored nail is reliably fixed.

[0048] Compared with the wire passing hole 3 extending axially, the length of the wire passing hole 3 in the present invention is shorter, which can reduce the resistance of the intraosseous fluid flowing through the wire passing hole 3, thereby improving the growth rate of the free bone and soft tissue, shortening the healing time of the free bone and soft tissue at the same time, with a short repair time and a fast repair speed.

[0049] Furthermore, shortening the length of the wire passing hole 3 can also effectively reduce the threading difficulty and create conditions for extending the length of the nail body 1. In this application, the length range of the nail body 1 is 10-70 mm, which is convenient for increasing the contact area between the nail body 1 and the main bone 01, and further ensuring that the suture-anchored nail is reliably fixed.

[0050] In summary, the fixation of the suture-anchored nail provided by the present invention is more reliable and the repair speed is faster.

[0051] The present invention further includes a plurality of anti-rotation grooves 4 provided on the outer periphery of the nail body 1. When the nail body 1 enters the main bone 01, the bone chips generated during the drilling process of the nail body 1 are convenient to deposit in the anti-rotation grooves 4, which is beneficial to the main bone 01 growing into the anti-rotation grooves 4, thereby preventing the nail body 1 from rotating relative to the main bone 01, and further ensuring that the suture-anchored nail can be reliably fixed in the main bone 01. The anti-rotation groove 4 can be a square groove, a trapezoidal groove, a triangular groove or a circular groove, which is not specifically limited herein. The depth range of the anti-rotation groove 4 is 0.1-2 mm, and the optimal depth range of the anti-rotation groove 4 is preferably 0.3-1 mm.

[0052] To further improve the anti-rotation effect, all the anti-rotation grooves 4 are arranged in a spiral shape. To prevent the suture 02 from falling into the anti-rotation groove 4 and causing the suture 02 to be unable to be fixed, the length of the anti-rotation groove 4 near the first end of the nail body 1 is greater than the length of the anti-rotation groove 4 near the second end of the nail body 1.

[0053] Please refer to Figure 1 , Figure 1 which is a partial sectional view of the suture-anchored nail provided by the first specific embodiment of the present invention.

[0054] In the first specific embodiment, with attachment Figure 1Based on the current view, the nail body 1 is cylindrical and is injection molded from PEEK material. The length of the nail body 1 is 60mm, and the diameter of the nail body 1 is 2.7mm. A waist-shaped threading hole 3 is provided on the nail body 1. The length of the waist-shaped threading hole 3 is 2mm, the width is 1mm, and a suture 02 with an outer diameter of 0.4mm is passed through the threading hole 3. The axial distance from the left end of the waist-shaped threading hole 3 to the tail of the nail body 1 is 25mm. A number of staggered rectangular anti-rotation grooves 4 are provided on the outer periphery of the nail body 1. The length of the rectangular anti-rotation groove 4 is 1.5mm, the width is 0.6mm, and the height is 0.5mm. The nail connection groove 12 provided at the tail of the nail body 1 is specifically an internal thread of M1.0×3mm.

[0055] It has been verified through experiments that the pull-out resistance of the wire anchor provided in the first specific embodiment can reach 425N.

[0056] Please refer to Figure 2 , Figure 2 This is a partial cross-sectional structural diagram of a wire anchor provided in a second specific embodiment of the present invention.

[0057] In the second specific embodiment, Figure 2 The current view is based on the present invention, the nail body 1 is cylindrical, and the nail body 1 is made of left-handed polylactic acid rod. The length of the nail body 1 is 70mm, and the diameter of the nail body 1 is 12mm. The nail body 1 is provided with three elliptical threading holes 3 evenly staggered along a straight line, each of which has a long diameter of 7mm and a short diameter of 3mm. The threading holes 3 are penetrated with a suture 02 with an outer diameter of 0.6mm. The axial distances from the left ends of the three elliptical threading holes 3 to the tail of the nail body 1 are 15mm, 25mm, and 30mm respectively. The outer periphery of the nail body 1 is provided with a plurality of staggered anti-rotation grooves 4 with a triangular cross section, and the cross section of the anti-rotation groove 4 has a length of 4mm, a width of 1mm, and a depth of 0.1mm. The nail connection groove 12 provided at the tail of the nail body 1 is specifically a regular hexagonal prism-shaped groove, and the diameter of the nail connection groove 12 is 5mm and the height is 6mm.

[0058] In this specific embodiment, it should be particularly pointed out that a plurality of conical press-wire protrusions 21 are provided on the outer periphery of the nail body 1, each of which has an equal taper and a small diameter end facing the conical nail head 11. All the conical press-wire protrusions 21 are evenly staggered along the axial direction. Any two adjacent conical press-wire protrusions 21 form a press-wire groove 2, which is in a circular ring shape. Specifically, the axial distance between any two adjacent conical press-wire protrusions 21 is 2 mm.

[0059] It has been verified through experiments that in the second specific embodiment, inserting a 0.4 mm suture 02 into the threading hole 3 at an axial distance of 25 mm from the nail body 1 can make the pull-out resistance of the wire anchor nail reach 965N.

[0060] Please refer to Figure 3, Figure 3 It is a partial sectional view structure diagram of the suture - attached anchor provided by the third specific embodiment of the present invention.

[0061] In the third specific embodiment, taking the Figure 3 current view as a reference, the nail body 1 is cylindrical. The nail body 1 is composed of a left - hand poly - lactic acid and hydroxyapatite composite, where the content of hydroxyapatite is 15%. The length of the nail body 1 is 50 mm, and the diameter of the nail body 1 is 4.5 mm. There are three circular wire - threading holes 3 distributed in a spiral shape on the nail body 1. The diameter of each wire - threading hole 3 is 1.5 mm. The axial distance between two wire - threading holes 3 is 5 mm, and the angle between any two adjacent wire - threading holes 3 is 120°. The axial distances from the left ends of the three circular wire - threading holes 3 to the tail of the nail body 1 are 9 mm, 14 mm, and 19 mm respectively. The outer periphery of the nail body 1 is provided with a number of anti - rotation grooves 4 arranged in a spiral shape and having a trapezoidal cross - section. The top side of the cross - section of the anti - rotation groove 4 is 3 mm, the bottom side is 1 mm, the depth is 0.1 mm, and the angle between the bottom side and the waist side is 120°. The nail connection groove 12 provided at the tail of the nail body 1 is specifically three semi - circular arc - shaped card slots evenly distributed in a circular ring shape. The depth of the semi - circular arc - shaped card slot is 0.7 mm and the length is 2 mm.

[0062] In this specific embodiment, it should be specifically pointed out that a spiral wire - pressing protrusion 22 is provided on the outer periphery of the nail body 1, and the wire - pressing groove 2 is spiral. The pitch of the spiral wire - pressing protrusion 22 is 1.5 mm and the tooth height is 0.5 mm.

[0063] Through experimental verification, in the third specific embodiment, threading a 0.4 - mm suture 02 into the wire - threading hole 3 at an axial distance of 19 mm from the nail body 1 can make the anti - pull - out force of the suture - attached anchor reach 683 N.

[0064] Please refer to Figure 4 , Figure 4 It is a partial sectional view structure diagram of the suture - attached anchor provided by the fourth specific embodiment of the present invention.

[0065] In the fourth specific embodiment, taking the Figure 4Based on the current view, the nail body 1 is cylindrical and is made of ethylene glycol copolymer, with the glycolide content being 20%. The length of the nail body 1 is 45 mm and the diameter is 3.5 mm. There are three rectangular wire threading holes 3 evenly distributed in a spiral shape on the nail body 1. Each rectangular wire threading hole 3 has a length of 3 mm and a width of 1 mm. The axial distance between two wire threading holes 3 is 5 mm, and the angle between any two adjacent wire threading holes 3 is 120°. The axial distances from the left ends of the three rectangular wire threading holes 3 to the tail of the nail body 1 are 9 mm, 13 mm, and 17 mm respectively. The outer periphery of the nail body 1 is provided with a number of anti-rotation grooves 4 arranged linearly with a semi-circular arc cross-section. The cross-sectional lengths of the anti-rotation grooves 4 are 3 mm and 25 mm, the radius is 1.5 mm, and the depth is 0.4 mm. The nail connection groove 12 provided at the tail of the nail body 1 is a cylindrical groove with a diameter of 0.9 mm and a length of 3 mm.

[0066] In this specific embodiment, a spiral wire pressing protrusion 22 is also provided on the outer periphery of the nail body 1. The wire pressing groove 2 is spiral, and the pitch of the spiral wire pressing protrusion 22 is 1.5 mm and the tooth height is 0.5 mm.

[0067] After experimental verification, in the fourth specific embodiment, threading a 0.4 mm suture 02 into the wire threading hole 3 at an axial distance of 13 mm from the nail body 1 can make the pull-out resistance of the suture-anchored nail reach 528 N.

[0068] Please refer to Figure 5 , Figure 5 which is the usage state diagram of the suture-anchored nail provided by the present invention.

[0069] The working principle of the suture-anchored nail provided by the present invention is as follows:

[0070] First, a surgical incision is made through surgery at the trauma site of the patient, and the free bone or soft tissue is manually reduced through the surgical incision;

[0071] A nail hole is drilled in the main bone 01 using a bone drill, and then the nail body 1 carrying the suture 02 is pushed into the main bone 01 through a nail pusher. The wire pressing groove 2 squeezes the suture 02, and the suture 02 is fixed between the nail body 1 and the main bone 01 by the squeezing force;

[0072] Continue to repeat drilling the nail hole, and fix other nail bodies 1 in the main bone 01 in turn. The suture 02 is tightened, so that the free bone or soft tissue is fixed on the main bone 01 under the combined action of the nail body 1 and the suture 02.

[0073] The above has introduced the suture - attached anchor provided by the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A suture - attached anchor, characterized in that, Comprising: A nail body (1); A plurality of pressure grooves (2) provided on the outer periphery of the nail body (1) for accommodating a suture (02) and fixing the suture (02) between the nail body (1) and the main bone (01); A threading hole (3) passing through the nail body (1) in the radial direction for the suture (02) to pass through; The pressure groove (2) is used for accommodating the suture (02) to fix the suture (02) between the nail body (1) and the main bone (01) by using extrusion force; the pressure groove (2) is also used for guiding the flow of intraosseous fluid so that bone chips carried by the intraosseous fluid can be deposited in the pressure groove (2); All the threading holes (3) are arranged in a spiral pattern; The empty threading holes (3) are used for the circulating flow of intraosseous fluid; Along the direction of decreasing bone density, the axial distance of the threading hole (3) from the tail of the nail body (1) gradually increases; The first end of the nail body (1) has a conical nail head (11) for guiding the nail body (1) to drill into the main bone (01); A plurality of conical pressure ridges (21) with small-diameter ends facing the conical nail head (11) and axially staggered are provided on the outer periphery of the nail body (1), and any two adjacent conical pressure ridges form the pressure groove (2).

2. The suture - attached anchor according to claim 1, characterized in that, A spiral pressure ridge (22) is provided on the outer periphery of the nail body (1), and the pressure groove (2) is spiral.

3. The wire - threaded anchor according to claim 1, wherein, The second end of the nail body (1) has a nail connection groove (12) for mating connection with a nail pusher.

4. The wire - threaded anchor according to claim 3, characterized in that, It also includes a plurality of anti-rotation grooves (4) provided on the outer periphery of the nail body (1) and used for preventing the nail body (1) from rotating relative to the main bone (01).

5. The wire - carrying anchor bolt according to claim 4, characterized in that, The anti-rotation grooves (4) are arranged in a spiral pattern.

6. The wire - threaded anchor according to claim 4, characterized in that, The length of the anti-rotation groove (4) near the first end of the nail body (1) is greater than the length of the anti-rotation groove (4) near the second end of the nail body (1).

7. The wire - attached anchor according to claim 3, wherein, The length range of the nail body (1) is 10 - 70 mm.

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