Miniature absorbable anchor with line and inserter thereof

Abstract

The utility model discloses a miniature absorbable anchor with a suture, which comprises an anchor body, a tip and the suture, one end of the anchor body protrudes upwards to form the tip, the anchor body is provided with a threading hole, the threading hole is used for accommodating the suture, the anchor body is of a non-axisymmetric structure, and the suture is arranged in the non-axisymmetric structure. The gravity center of the anchor body is not on the center line of the threading hole. The utility model provides a miniature absorbable anchor with a line, which can deflect in a bone tunnel through center-of-gravity shift, is convenient to implant and has high anchoring strength.

Description

Technical Field

[0001] The utility model belongs to the field of medical equipment, and in particular relates to a micro absorbable wire anchor and an inserter thereof. Background Art

[0002] When tendons and collateral ligaments around joints of hands and feet are ruptured or tendons and ligament attachment points are avulsed and fractured, micro-wire anchors are needed to fix the ligaments or tendons in order to reconstruct the tendons or ligaments. When used, the wire anchors are implanted into the bone of the injured part, and the damaged tendons or ligaments are sutured and fixed with sutures fixed on the micro-wire anchors.

[0003] The existing micro-wire anchor includes an anchor body, a tip and a suture. The anchor body is a cylinder, the top of the anchor body protrudes upward to form a tip, the bottom of the anchor body fixes the suture, and the circumferential side walls of the anchor body and the tip are provided with external threads. Currently, the commonly used micro-wire anchors on the market are mostly metal parts, which are fixed in the form of metal brackets. However, the metal wire anchor needs to be removed a second time, which undoubtedly increases the trauma caused by the operation to the patient. The same micro-wire anchor made of absorbable materials often has problems such as difficult processing and insufficient holding force.

[0004] Therefore, providing a micro-wire anchor that does not require secondary removal, is easy to process, and is convenient to implant is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] The utility model provides a micro absorbable anchor with a wire, which can be deflected and anchored in a bone tunnel by shifting the center of gravity, is easy to implant and has high anchoring strength.

[0006] The utility model also provides an inserter, which can be matched with a micro absorbable wire anchor to improve implantation efficiency and facilitate operation.

[0007] In order to solve the above technical problems, the technical solution provided by the utility model is: a micro absorbable suture anchor, comprising an anchor body, a tip and a suture, one end of the anchor body protrudes upward to form the tip, and a threading hole is provided on the anchor body, and the threading hole is used to accommodate the suture, wherein the anchor body is a non-axisymmetric structure, and the center of gravity of the anchor body is not on the center line of the threading hole.

[0008] Furthermore, the tip has a symmetry plane, the symmetry plane is parallel to the center line of the threading hole, and the center of gravity of the anchor body and the center of gravity of the threading hole are respectively located on both sides of the symmetry plane.

[0009] Furthermore, a groove is provided at the other end of the anchor body, and the groove cooperates with the implantation tool.

[0010] Further, the anchor body has an end face, the groove is arranged at the end face, and the vertical distance between the center of gravity of the anchor body and the end face is smaller than the vertical distance between the center of gravity of the threading hole and the end face.

[0011] Furthermore, the threading hole is arranged close to the tip, and the center of gravity of the anchor body is close to the end surface.

[0012] Furthermore, the center line of the groove intersects with the center line of the tip to form a first acute angle α.

[0013] Furthermore, the first acute angle α satisfies: 0°<α≤5°.

[0014] An inserter includes the micro absorbable wire anchor described above, and also includes a handle, a connecting rod and a connecting part connected in sequence, wherein the handle and the connecting rod are coaxially connected, and the center line of the connecting part and the center line of the connecting rod form a second acute angle β.

[0015] Further, the second acute angle β satisfies: 0°<β≤5°, and the second acute angle β matches the groove of the anchor body.

[0016] Furthermore, it also includes a handle, and wire grooves are arranged on both sides of the handle.

[0017] The beneficial effects of the utility model are as follows: the micro absorbable anchor with thread is designed as a non-axisymmetric structure, and the center of gravity and the threading hole are offset and distributed on both sides of the anchor body, so that the anchor body can be deflected by the offset of the center of gravity and the action of the suture to achieve anchoring, thereby improving the anchoring strength and the convenience of operation; at the same time, the inclination setting of the inserter and the groove makes it possible for the inserter to rotate when the inserter axially withdraws from the anchor, thereby promoting the deflection of the anchor and implanting it into the bone tunnel; the micro absorbable anchor with thread has a simple structure, is easy to process and form, and uses absorbable materials, so there is no need for secondary removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the micro absorbable wire anchor of the utility model;

[0019] Figure 2 It is a cross-sectional view of the micro absorbable wire anchor of the utility model;

[0020] Figure 3 It is a front view of the micro absorbable wire anchor of the utility model;

[0021] Figure 4 This is a structural diagram of the inserter of the utility model;

[0022] Figure 5This is a structural diagram of the inserter of the utility model used in conjunction with a micro absorbable wire anchor.

[0023] Reference numerals include:

[0024] 100 - micro absorbable anchor with thread 110 - anchor body 120 - tip

[0025] 130 - Suture line 140 - Threading hole 150 - Groove

[0026] 160—end surface 200—inserter 210—handle

[0027] 220—connecting rod 230—connecting portion 211—wire trough DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] like Figure 1-3The structure of the micro absorbable anchor 100 provided by the utility model mainly includes: an anchor body 110, a tip 120 and a suture 130. The anchor body 110 is a non-axisymmetric structure, with a top protruding upward at one end to form a tip 120, which is used to be implanted into a bone tunnel, and a groove 150 is provided at the other end, which is used to connect with an implantation tool. The anchor body 110 is provided with a threading hole 140, which is used to accommodate the suture 130 (such as Figure 5 As described above, since the anchor body 110 is a non-axisymmetric structure, one end of the groove 150 has an end surface 160, and the structural dimension near the end surface 160 is larger than the dimension near the tip 120, such as Figure 3 As shown, the right half of the anchor body 110 weighs more than the left half, and its center of gravity is located at the upper right side of the anchor body 110, and the threading hole 140 is located at the lower left side of the anchor body 110. The tip 120 is an axisymmetric structure, having a symmetry plane, and the symmetry plane is parallel to the center line of the threading hole 140. The center of gravity of the anchor body 110 and the center of gravity of the threading hole 140 are respectively located on both sides of the symmetry plane of the tip 120, and the vertical distance between the center of gravity of the anchor body 110 and the end face 160 is smaller than the vertical distance between the center of gravity of the threading hole 140 and the end face 160. Therefore, under the combined effect of the center of gravity offset of the anchor body 110 and the suture 130, the anchor body 110 will deflect in the bone tunnel, so that the tip 120 is inserted into the side wall of the bone tunnel to achieve anchoring.

[0033] The center line of the groove 150 intersects with the center line of the tip 120 to form a first acute angle α.

[0034] like Figure 2 As shown, the tip 120 is an axisymmetric structure, the center line of the tip 120 is perpendicular to the end face 160, the center line of the groove 150 is not perpendicular to the end face 160, and the intersection with the center line of the tip 120 forms a first acute angle α, and the first acute angle α satisfies: 0°<α≤5°. The structure of the relatively inclined groove 150 can make the anchor body 110 rotate when the implantation tool is withdrawn, which helps its anchoring.

[0035] like Figure 4 and 5The structure diagram of the implantation tool (i.e., inserter 200) of the micro absorbable band anchor 100 provided by the utility model is shown, which mainly includes a handle 210, a connecting rod 220 and a connecting portion 230 connected in sequence, the handle 210 is coaxially connected to the connecting rod 220, and the connecting portion 230 is used to match the groove 150 of the micro absorbable band anchor 100. The center line of the connecting portion 230 and the center line of the connecting rod 220 form a second acute angle β, and the second acute angle β is equal to the first acute angle α to ensure that it can match the inclination angle of the groove 150. The handle 210 is provided with a wire groove 211 on both sides for accommodating the suture 130.

[0036] During the implantation process, the micro absorbable wire anchor 100 is implanted into the bone tunnel using the inserter 200, and then the inserter 200 is withdrawn. When withdrawing, the connecting portion 230 drives the anchor body 110 to deflect when withdrawing from the groove 150, and the suture 130 is adjusted so that the anchor body 110 deflects under the action of the center of gravity offset and the tension of the suture 130.

[0037] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. A micro absorbable wire anchor, characterized in that: The invention comprises an anchor body (110), a tip (120) and a suture (130), wherein one end of the anchor body (110) protrudes upward to form the tip (120), and a threading hole (140) is provided on the anchor body (110), wherein the threading hole (140) is used to accommodate the suture (130), wherein the anchor body (110) is a non-axisymmetric structure, and the center of gravity of the anchor body (110) is not on the center line of the threading hole (140).

2. The micro absorbable wire anchor according to claim 1, characterized in that: The tip (120) has a symmetry plane, the symmetry plane is parallel to the center line of the threading hole (140), and the center of gravity of the anchor body (110) and the center of gravity of the threading hole (140) are respectively located on both sides of the symmetry plane.

3. The micro absorbable wire anchor according to claim 2, characterized in that: The other end of the anchor body (110) is provided with a groove (150), and the groove (150) cooperates with an implantation tool.

4. The micro absorbable wire anchor according to claim 3, characterized in that: The anchor body (110) has an end surface (160), the groove (150) is arranged at the end surface (160), and the vertical distance between the center of gravity of the anchor body (110) and the end surface (160) is smaller than the vertical distance between the center of gravity of the threading hole (140) and the end surface (160).

5. The micro absorbable wire anchor according to claim 4, characterized in that: The threading hole (140) is arranged close to the tip (120), and the center of gravity of the anchor body (110) is close to the end surface (160).

6. The micro absorbable wire anchor according to claim 5, characterized in that: The center line of the groove (150) intersects with the center line of the tip (120) to form a first acute angle α.

7. The micro absorbable wire anchor according to claim 6, characterized in that: The first acute angle α satisfies: 0°<α≤5°.

8. An inserter comprising the micro absorbable wire anchor according to any one of claims 1 to 7, characterized in that: It also comprises a handle, a connecting rod (220) and a connecting portion (230) which are connected in sequence, the handle and the connecting rod (220) are coaxially connected, and the center line of the connecting portion (230) forms a second acute angle β with the center line of the connecting rod (220).

9. The inserter according to claim 8, characterized in that The second acute angle β satisfies: 0°<β≤5°, and the second acute angle β matches the groove of the anchor body (110).

10. The inserter according to claim 9, characterized in that It also includes a handle (210), and wire accommodating grooves (211) are arranged on both sides of the handle (210).

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