Anchor nail with wire

Abstract

The present invention discloses a wire anchor, comprising: at least two anchor segments that are independent of each other and have a preset interval, the anchor segments include at least one nail body segment and a nail head segment, the nail head segment is provided with a threading hole for threading a suture; a connecting pin for connecting all the anchor segments, each anchor segment is fixedly sleeved on the outer periphery of the connecting pin, and the interior of the connecting pin is provided with a through hole for threading a suture along its axis; when the wire anchor is implanted in the bone, the connecting pin can be pulled out from each anchor segment. When the connecting pin is pulled out, each anchor segment remains in the bone, and since each anchor segment is independent of each other and has a preset interval, bone scraps and bone tissue will fill in the gaps between each anchor segment, so that the bone tissue grows in the gaps, which is beneficial to bone growth and healing.

Description

Technical Field

[0001] The present invention relates to the technical field of implantable medical devices, and more particularly to a wire anchor. Background Art

[0002] Joint soft tissue injury mainly refers to a large type of trauma syndrome caused by direct or indirect violence to tendons, ligaments, joint capsules, etc., or long-term chronic strain. It is a common disease in the discipline of sports medicine, such as rotator cuff injury, cruciate ligament rupture, Achilles tendon rupture, etc.

[0003] Mild soft tissue injuries can usually be relieved quickly with proper treatment by a professional doctor; however, severe soft tissue injuries, such as tendon avulsion, ligament tear or rupture, require surgical treatment.

[0004] Clinically, rotator cuff tears, knee collateral ligament injuries, and ankle and elbow soft tissue injuries are usually repaired by implanting wire anchors. During the operation, a bone tunnel is first punched in the bone with a puncher, and then the anchor is inserted under the cortical bone with an anchor inserter. Then, sutures are used to fix the avulsed or torn soft tissue on the bone surface to promote the healing of soft tissue and bone and achieve a repair effect.

[0005] However, since the body of the existing wire anchor is an integral whole, the anchor body always occupies space in the bone tunnel, making it difficult for bone tissue to grow into the anchor through the anchor wall, which is not conducive to bone growth and healing. Moreover, during the anchor implantation process, bone debris that helps new bone growth will be completely squeezed out of the anchor, which is also not conducive to bone growth and healing.

[0006] In summary, how to provide a wire anchor that is conducive to bone growth and healing is a problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0007] In view of this, an object of the present invention is to provide a wire anchor that is conducive to bone growth and healing.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A wire anchor, comprising:

[0010] At least two anchor segments that are independent of each other and have a preset interval, wherein the anchor segments include at least one nail body segment and a nail head segment, and the nail head segment is provided with a threading hole for threading a suture;

[0011] A connecting pin is used to connect all the anchor segments, each of the anchor segments is fixedly sleeved on the outer periphery of the connecting pin, and a through hole for threading sutures is provided inside the connecting pin along its axis; when the wire anchor is implanted in the bone, the connecting pin can be pulled out from each of the anchor segments.

[0012] Preferably, the radial dimension of the connecting pin gradually increases from one end thereof sleeved with the nail head section to the other end.

[0013] Preferably, one of the outer peripheral portion of the connecting pin and the inner wall of the anchor segment is provided with a convex ridge, and the other is provided with a groove for cooperating with the convex ridge.

[0014] Preferably, the outer periphery of each anchor segment is provided with an external thread.

[0015] Preferably, the outer periphery of each anchor segment includes at least two truncated cones, the large end of one of two adjacent truncated cones is connected to the small end of the other, and the diameter of the large end is greater than the diameter of the small end, and the small ends of all the truncated cones are facing the nail head segment.

[0016] Preferably, the nail head section is provided with a stepped through hole, which includes the threading hole and a mounting hole for socketing with the connecting pin, and the diameter of the threading hole is larger than the diameter of the mounting hole so that the suture cannot pass through the mounting hole after being knotted.

[0017] Preferably, an end of the nail head section away from the nail body section is sleeved with an anchor cap, and the anchor cap is provided with the threading hole, and the threading hole includes:

[0018] an axial threading hole communicating with the through hole;

[0019] A radial threading hole communicated with the axial threading hole and penetrating the side wall of the anchor cap.

[0020] Preferably, the radial threading holes include a first radial threading hole and a second radial threading hole having a preset axial interval.

[0021] Preferably, one end of the anchor cap away from the nail head section is a cone.

[0022] Preferably, the anchor segment includes an anchor segment made of a biodegradable material, an anchor segment made of a mixture of a biodegradable material and an inorganic material, a titanium alloy anchor segment, a magnesium alloy anchor segment, a stainless steel anchor segment, a metal anchor segment with a polymer coating, or a polyetheretherketone anchor segment;

[0023] The connecting pins include connecting pins made of biodegradable materials, connecting pins made of a mixture of biodegradable materials and inorganic materials, titanium alloy connecting pins, magnesium alloy connecting pins, stainless steel connecting pins, metal connecting pins with polymer coatings, or polyetheretherketone connecting pins.

[0024] When the anchor with wire provided by the present invention is used, after the suture is inserted, a bone tunnel is first punched on the bone using a puncher, and then the anchor with wire is implanted into the bone as a whole using an anchor inserter, and then the connecting pin is pulled out, so that each anchor segment remains in the bone, and the suture is used to fix the avulsed or torn soft tissue on the bone surface, promoting the healing of the soft tissue and the bone to achieve a repair effect. Since each anchor segment is independent of each other and has a preset interval, bone scraps and bone tissue will fill the gap between each anchor segment, so that the bone tissue grows in the gap.

[0025] It can be seen from this that the wire anchor provided by the present invention improves the overall continuous anchor body in the prior art into at least two independent anchor segments with preset intervals, and connects the anchor segments together through connecting pins to form an integral anchor, so that the wire anchor can be implanted as a whole into the bone. After the anchor segments are implanted into the bone, the connecting pins are pulled out so that the anchor segments remain in the bone and maintain their relative positions to each other, so that bone chips and bone tissue can fill and grow in the gaps between the anchor segments, thereby facilitating bone growth and healing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A front view of a wire anchor provided in a first specific embodiment of the present invention;

[0028] Figure 2 for Figure 1 A cross-sectional view of

[0029] Figure 3 for Figure 1 Schematic diagram after the connecting pin is pulled out;

[0030] Figure 4 for Figure 3 Left view of

[0031] Figure 5 for Figure 3 Right view of;

[0032] Figure 6A front view of a wire anchor (anchor cap not shown) provided in a second specific embodiment of the present invention;

[0033] Figure 7 for Figure 6 A cross-sectional view of

[0034] Figure 8 for Figure 6 Schematic diagram after the connecting pin is pulled out;

[0035] Fig. 9 for Figure 8 Left view of

[0036] Fig.10 for Figure 8 Right view of;

[0037] Fig.11 For Figure 6 A schematic diagram of an anchor cap sleeved with a nail head section is shown;

[0038] Fig.12 A front view of a wire anchor provided in a third specific embodiment of the present invention;

[0039] Fig.13 for Fig.12 A cross-sectional view of

[0040] Fig.14 for Fig.12 Schematic diagram after the connecting pin is pulled out;

[0041] Fig.15 for Fig.14 Left view of

[0042] Fig.16 for Fig.14 Right view of .

[0043] Figures 1 to 16 The reference numerals in the figures are as follows:

[0044] 1 is an anchor section, 11 is a nail body section, 12 is a nail head section, 111 is a truncated cone, 121 is a stepped through hole, 13 is an anchor cap, 131 is a radial threading hole, 132 is a first radial threading hole, 133 is a second radial threading hole, 134 is a cone, 2 is a connecting pin, and 21 is a through hole. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The core of the present invention is to provide a wire anchor which is beneficial to bone growth and healing.

[0047] Please refer to Figure 1-Figure 16 , which is an illustration of the specification of the present invention.

[0048] The present invention provides a wire anchor, comprising at least two anchor segments 1 and a connecting pin 2 for connecting all the anchor segments 1, wherein each anchor segment 1 is fixedly sleeved on the outer periphery of the connecting pin 2, that is, each anchor segment 1 is provided with a mounting hole for cooperating with the outer periphery of the connecting pin 2, and the fixed connection between the anchor segment 1 and the connecting pin 2 is achieved through the cooperation between the mounting hole and the outer periphery of the connecting pin 2.

[0049] The present invention does not limit the shape of the outer periphery of the connecting pin 2. For example, the connecting pin 2 may be a prism or a cylinder, that is, the shape of the cross section of the connecting pin 2 may be a polygon or a circle.

[0050] Correspondingly, the shape of the mounting hole of each anchor segment 1 is adapted to the shape of the outer periphery of the connecting pin 2 to ensure the matching connection between each anchor segment 1 and the connecting pin 2 .

[0051] A through hole 21 for threading a suture is provided inside the connecting pin 2 along its axis so as to allow the suture to pass through.

[0052] In addition, each anchor segment 1 is independent of each other, and there is a preset interval between two adjacent anchor segments 1. The present invention does not limit the specific value of the preset interval.

[0053] Furthermore, the anchor segment 1 includes at least one nail body segment 11 and a nail head segment 12. The nail head segment 12 is provided with a threading hole for threading a suture. It can be understood that the threading hole is connected to the through hole 21 to facilitate the threading of the suture so that one end of the suture is connected to the nail head segment 12.

[0054] It should be noted that the present embodiment does not specifically limit the external shapes of each nail body segment 11 and nail head segment 12. For example, the external structure of each nail body segment 11 may be the same as the local structure of the nail body of a conventional anchor in the prior art, and the external shape of the nail head segment 12 may be the same as the shape of the nail head of a conventional anchor in the prior art.

[0055] Preferably, the structures of the nail shank sections 11 are the same.

[0056] It should be noted that there needs to be appropriate friction between each anchor segment 1 and the connecting pin 2 so that when the wire anchor is implanted as a whole into the bone, the connecting pin 2 can be pulled out from each anchor segment 1. That is, when the wire anchor is implanted as a whole into the bone, the friction between the connecting pin 2 and each anchor segment 1 needs to be smaller than the force between each anchor segment 1 and the bone, so that the connecting pin 2 can be pulled out, and only each anchor segment 1 remains in the bone.

[0057] That is to say, during the operation, when using the wire anchor provided by the present invention, after the suture is inserted, a bone tunnel is first punched on the bone using a puncher, and then the wire anchor is implanted as a whole into the bone through the anchor inserter. Then, the connecting pin 2 is pulled out, and the suture is used to fix the avulsed or torn soft tissue on the bone surface to promote the healing of the soft tissue and the bone to achieve a repair effect.

[0058] It is understandable that after the connecting pin 2 is pulled out, each anchor segment 1 remains in the bone. Since each anchor segment 1 is independent of each other and has a preset interval, bone scraps and bone tissue will fill the gaps between the anchor segments 1, allowing bone tissue to grow in the gaps.

[0059] It can be seen from this that the wire anchor provided by the present invention improves the overall continuous anchor body in the prior art into at least two independent anchor segments 1 with a preset interval, and connects the anchor segments 1 together through a connecting pin 2 to form an integral anchor, so that the wire anchor can be implanted as a whole into the bone. After the anchor segments 1 are implanted into the bone, the connecting pin 2 is pulled out so that the anchor segments 1 remain in the bone and maintain their relative positions to each other, so that bone chips and bone tissue can fill and grow in the gaps between the anchor segments 1, thereby facilitating bone growth and healing.

[0060] In order to facilitate the extraction of the connecting pin 2 from each anchor segment 1, based on the above embodiment, the radial dimension of the connecting pin 2 from one end sleeved with the nail head segment 12 to the other end gradually increases.

[0061] Obviously, correspondingly, the radial dimension of the mounting hole of each nail body segment 11 also gradually increases from the end facing the nail head segment 12 to the end away from the nail head segment 12 , so as to achieve complete fit between each nail body segment 11 and the outer periphery of the connecting pin 2 .

[0062] It can be understood that this is conducive to improving the smoothness of the connection pin 2 when being pulled out, and reducing the withdrawal force required to pull out the connection pin 2.

[0063] In addition, in order to ensure accurate positioning of each anchor segment 1 and the connecting pin 2, based on the above embodiment, one of the outer periphery of the connecting pin 2 and the inner wall of the anchor segment 1 is provided with a ridge, and the other is provided with a groove for cooperating with the ridge.

[0064] That is to say, in this embodiment, the positioning between the anchor segment 1 and the connecting pin 2 is achieved by the cooperation between the convex ridge and the concave groove, so as to ensure the relative position of the two.

[0065] It should be noted that when the connecting pin 2 is pulled out, the convex ridge and the concave groove can be separated from each other under the action of the external pulling-out force applied to the connecting pin 2, so that the connecting pin 2 can be pulled out.

[0066] As a preferred solution, the ridges and the grooves are arranged parallel to the axial direction of the connecting pin 2 and the anchor segment 1 .

[0067] like Figure 1 As shown, considering the specific implementation of the external structure of each anchor segment 1, on the basis of the above embodiment, the outer periphery of each anchor segment 1 is provided with an external thread.

[0068] That is to say, when the wire anchor is implanted as a whole into the bone, the connecting pin 2 is screwed so that the connecting pin 2 drives each anchor segment 1 to be screwed into the bone.

[0069] As a preferred embodiment, the external thread includes a double thread, such as Fig.12 shown.

[0070] like Figure 6 As shown, considering another implementation method of the external structure of each anchor segment 1, on the basis of the above embodiment, the outer periphery of each anchor segment 1 includes at least two truncated cones 111, the large end of one of the two adjacent truncated cones 111 is connected to the small end of the other, and the diameter of the large end is greater than the diameter of the small end, and the small ends of all the truncated cones 111 are facing the nail head segment 12.

[0071] That is to say, when the anchor with wire is implanted in the bone as a whole, each anchor segment 1 is continuously knocked into the bone by knocking the end of the connecting pin 2 away from the nail head segment 12 .

[0072] The small end of the truncated cone 111 faces the nail head section 12, which makes it easier to knock each anchor segment 1 into the bone; and when the connecting pin 2 is pulled out, the large end of the truncated cone 111 makes it difficult for the anchor segment 1 to be pulled out of the bone.

[0073] like Figure 2 As shown, considering an implementation method of the specific structure of the nail head section 12, on the basis of the above embodiment, the nail head section 12 is provided with a stepped through hole 121, and the stepped through hole 121 includes a threading hole and a mounting hole for sleeved with the connecting pin 2, and the aperture of the threading hole is larger than the aperture of the mounting hole, so that the suture cannot pass through the mounting hole after being knotted.

[0074] That is to say, in this embodiment, the threading hole and the mounting hole of the nail head section 12 form a stepped structure, and the suture is passed through the through hole 21 of the connecting pin 2 and the threading hole of the nail head section 12. By tying the suture at the threading hole and making the diameter of the suture knot larger than the diameter of the mounting hole of the nail head section 12, the suture is connected to the nail head section 12 to avoid the suture being pulled out when the connecting pin 2 is pulled out.

[0075] The present embodiment does not specifically limit the specific threading method of the suture, and those skilled in the art may refer to the prior art.

[0076] Considering another implementation method of the specific structure of the nail head section 12, on the basis of the above embodiment, an anchor cap 13 is provided at one end of the nail head section 12 away from the nail body section 11, and the anchor cap 13 is provided with a threading hole, and the threading hole includes an axial threading hole and a radial threading hole 131. The axial threading hole is connected to the through hole 21 of the connecting pin 2, and the radial threading hole 131 is connected to the axial threading hole, and the radial threading hole 131 passes through the side wall of the anchor cap 13.

[0077] That is to say, in this embodiment, the anchor cap 13 is provided on the nail head section 12 , and a threading hole is provided on the anchor cap 13 , so as to achieve the connection between the suture and the nail head section 12 .

[0078] When threading, the suture is inserted from the through hole 21 at the end of the connecting pin 2 away from the nail head section 12, and the suture is passed through the axial threading hole of the anchor cap 13, and then through the radial threading hole 131 of the anchor cap 13, bypassing the side wall of the anchor cap 13, and the suture is passed through the radial threading hole 131 and the axial threading hole again, and finally passed through the through hole 21 of the connecting pin 2 away from the nail head section 12, and the suture is tightened.

[0079] Further, based on the above embodiment, the radial threading hole 131 includes a first radial threading hole 132 and a second radial threading hole 133 having a preset axial interval.

[0080] That is to say, when threading, the suture enters from the through hole 21 at the end of the connecting pin 2 away from the nail head section 12, and passes out from the axial threading hole of the anchor cap 13, and then passes out from the first radial threading hole 132, bypasses the side wall of the anchor cap 13 between the first radial threading hole 132 and the second radial threading hole 133, and then enters from the second radial threading hole 133, and finally passes through the axial threading hole and the through hole 21, and passes back from the end of the through hole 21 away from the nail head section 12.

[0081] It should be noted that the present invention does not limit the specific socket connection method between the anchor cap 13 and the nail head section 12.

[0082] In order to facilitate the implantation of the wire anchor into the bone as a whole, based on the above embodiment, one end of the anchor cap 13 away from the nail head section 12 is a cone 134 .

[0083] Taking into account the specific material of the wire anchor, on the basis of the above embodiments, the anchor segment 1 includes an anchor segment made of a biodegradable material, an anchor segment made of a mixture of biodegradable materials and inorganic materials, a titanium alloy anchor segment, a magnesium alloy anchor segment, a stainless steel anchor segment, a metal anchor segment with a polymer coating, or a polyetheretherketone anchor segment.

[0084] Similarly, the connecting pin 2 includes a connecting pin made of a biodegradable material, a connecting pin made of a mixture of a biodegradable material and an inorganic material, a titanium alloy connecting pin, a magnesium alloy connecting pin, a stainless steel connecting pin, a metal connecting pin with a polymer coating, or a polyetheretherketone connecting pin.

[0085] It is understandable that biodegradable materials can be automatically degraded and absorbed by the human body. Therefore, the anchor segment 1 can preferably be an anchor segment made of biodegradable material or an anchor segment made of a mixture of biodegradable material and inorganic material.

[0086] In order to improve the overall strength of the wire anchor and avoid breakage of the wire anchor when it is implanted in the bone, preferably, the connecting pin 2 is a titanium alloy connecting pin, a magnesium alloy connecting pin, a stainless steel connecting pin or a metal connecting pin with a polymer coating.

[0087] It should be noted that the above-mentioned biodegradable material includes any one of L-lactide, D-lactide, glycolide, ε-caprolactone, polyethylene glycol, polydioxanone and 3-methylene carbonate; or, the biodegradable material includes any two or more homopolymers or copolymers of L-lactide, D-lactide, glycolide, ε-caprolactone, polyethylene glycol, polydioxanone and 3-methylene carbonate; or, the biodegradable material includes a mixture of the above homopolymers or copolymers.

[0088] The inorganic material includes any one of hydroxyapatite (HA) and tricalcium phosphate (TCP) or a mixture of the two in any ratio.

[0089] In the anchoring nail segment 1 and the connecting pin 2 made of a mixture of biodegradable material and inorganic material, preferably, the mass ratio of the inorganic material to the mass ratio of the mixture of biodegradable material and inorganic material is 1%-50%.

[0090] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0091] The above is a detailed introduction to the wire anchor provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A wire anchor, characterized in that: include: An anchor segment (1), the anchor segment (1) comprising at least one nail body segment (11) and a nail head segment (12), each nail body segment (11) and each nail head segment (12) being independent of each other and having a preset interval, and the nail head segment (12) being provided with a threading hole for threading a suture; A connecting pin (2) for connecting all the nail body segments (11) and the nail head segments (12), wherein the nail body segments (11) and the nail head segments (12) are fixedly sleeved on the outer periphery of the connecting pin (2), and a through hole (21) for passing a suture is provided inside the connecting pin (2) along its axis; when the anchor nail with thread is implanted in the bone, the connecting pin (2) can be pulled out from the nail body segments (11) and the nail head segments (12), so that the nail body segments (11) and the nail head segments (12) remain in the bone and maintain their relative positions to each other; One of the outer periphery of the connecting pin (2) and the inner wall of the anchor segment (1) is provided with a convex ridge, and the other is provided with a groove for cooperating with the convex ridge.

2. The wire anchor according to claim 1, characterized in that: The radial dimension of the connecting pin (2) gradually increases from one end thereof sleeved with the nail head section (12) to the other end.

3. The belt line anchor according to claim 1, characterized in that: The outer circumferences of the nail body section (11) and the nail head section (12) are both provided with external threads.

4. The belt line anchor according to claim 1, characterized in that: The outer peripheries of the nail body section (11) and the nail head section (12) each include at least two truncated cones (111), the large end of one of two adjacent truncated cones (111) being connected to the small end of the other, the diameter of the large end being greater than the diameter of the small end, and the small ends of all the truncated cones (111) facing the nail head section (12).

5. The belt line anchor according to claim 1, characterized in that: The nail head section (12) is provided with a stepped through hole (121), the stepped through hole (121) comprising the threading hole and a mounting hole for sleeve connection with the connecting pin (2), the threading hole having a larger diameter than the mounting hole so that the suture cannot pass through the mounting hole after being knotted.

6. The belt line anchor according to claim 1, characterized in that: An end of the nail head section (12) away from the nail body section (11) is sleeved with an anchor cap (13), and the anchor cap (13) is provided with the threading hole, and the threading hole comprises: an axial threading hole communicating with the through hole (21); A radial threading hole (131) communicates with the axial threading hole and penetrates the side wall of the anchor cap (13).

7. The belt line anchor according to claim 6, characterized in that: The radial threading holes (131) comprise a first radial threading hole (132) and a second radial threading hole (133) having a preset axial spacing.

8. The belt line anchor according to claim 6, characterized in that: One end of the anchor cap (13) away from the nail head section (12) is a cone (134).

9. The wire anchor according to any one of claims 1 to 8, characterized in that: The anchor segment (1) includes an anchor segment made of a biodegradable material, an anchor segment made of a mixture of a biodegradable material and an inorganic material, a titanium alloy anchor segment, a magnesium alloy anchor segment, a stainless steel anchor segment, a metal anchor segment with a polymer coating, or a polyetheretherketone anchor segment; The connecting pin (2) includes a connecting pin made of a biodegradable material, a connecting pin made of a mixture of a biodegradable material and an inorganic material, a titanium alloy connecting pin, a magnesium alloy connecting pin, a stainless steel connecting pin, a metal connecting pin with a polymer coating, or a polyetheretherketone connecting pin.

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