A shape memory anchor

Abstract

The present application relates to a shape memory anchor, which comprises a connecting section and at least two deformation wings arranged on the connecting section; the deformation wings are made of shape memory material, the deformation wings are arc-shaped at room temperature, and the deformation wings unfold after being heated. The present application has the effects of reducing the volume of the anchor body to reduce the amount of bone removal, reducing the damage to the bone, and facilitating the postoperative recovery of the patient.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular, to a shape memory anchor Background Art

[0002] At present, as people's attention to sports gradually increases, injuries to ligaments, tendons and other soft tissues caused by various reasons are increasing. With the development of sports medicine technology, damaged tissues can be restored through surgery

[0003] At the present stage, the common repair method is to fix the damaged tissue to the bone through an anchor. The suture anchor technology made of titanium alloy, PEEK (polyetheretherketone) and polylactic acid materials is widely used in the repair and treatment of injuries at the connection between soft tissues and bone tissues. When the anchor is fixed on the bone, a bone tunnel for accommodating the anchor is formed in the bone, and at the same time, some bone chips are removed from the bone tunnel

[0004] Regarding the above related technologies, the inventor believes that although a larger anchor can be stably fixed on the bone, a larger anchor will also increase the amount of bone removal, and there are defects such as increasing the damage to the bone and being unfavorable for the postoperative recovery of the patient Summary of the Invention

[0005] In order to improve the defects that a larger anchor will increase the damage to the bone and is unfavorable for the postoperative recovery of the patient, the present application provides a shape memory anchor

[0006] The shape memory anchor provided by the present application adopts the following technical solution

[0007] A shape memory anchor, the shape memory anchor body includes a connecting section and at least two deformation wings arranged on the connecting section

[0008] The deformation wing is a deformation wing made of a shape memory material. The deformation wing is arc-shaped at room temperature and unfolds when heated

[0009] By adopting the above technical solution, a suture is connected to the shape memory anchor. After a bone tunnel adapted to the shape memory anchor is drilled in the patient's bone, the shape memory anchor with the deformation wing in an arc shape is implanted into the bone tunnel using a specific inserter, and then the deformation wing deforms and unfolds after heating the shape memory anchor at body temperature, and is embedded into the bone under the action of the tension of the connected suture, thereby completing the fixation of the anchor to the bone. The arc-shaped deformation wing can effectively reduce the overall volume of the shape memory anchor, and is more smooth when the deformation wing unfolds during the heating process, which is beneficial to the deformation wing being embedded into the bone. The shape memory anchor with a smaller volume can not only reduce the amount of bone removal caused by opening the bone tunnel, reduce the damage to the bone, thus being beneficial to the patient's good postoperative recovery, but also facilitate the implantation of the shape memory anchor into the bone

[0010] Optionally, one end of the deformable wing away from the connecting section is processed into a second tip.

[0011] By adopting the above technical solution, the second tip facilitates the embedding of the deformable wing into the bone in the bone tunnel.

[0012] Optionally, the edge of the deformable wing is inclined from the second tip towards the midline of the connecting section.

[0013] By adopting the above technical solution, when the shape memory anchor is implanted, it not only facilitates the embedding of the deformable wing into the bone, but also can effectively increase the area of the deformable wing embedded in the bone, thereby further enhancing the stability of the connection between the shape memory anchor and the bone, and further facilitating the postoperative recovery of the patient.

[0014] Optionally, one side of the connecting section away from the second tip is processed into a first tip, and the edge of the first tip is smoothly transitioned with the edge of the deformable wing.

[0015] By adopting the above technical solution, the area of the insertion end of the shape memory anchor is reduced, thereby facilitating the implantation of the shape memory anchor into the bone tunnel.

[0016] Optionally, a threading hole is provided on the shape memory anchor body.

[0017] By adopting the above technical solution, after the suture passes through the threading hole, it is convenient to connect the suture with the shape memory anchor.

[0018] Optionally, the threading hole is provided on the connecting section.

[0019] Optionally, the shape memory anchor further includes an extension section provided on the connecting section, and the extension section is located on the side of the connecting section away from the first tip.

[0020] By adopting the above technical solution, the extension section facilitates the doctor to pick up the shape memory anchor with the inserter without significantly increasing the width of the shape memory anchor. Compared with clamping the connecting section with the inserter, after the inserter clamps the extension section, it can also provide a better view for the doctor in the bone tunnel during the implantation of the shape memory anchor, thereby facilitating the accurate implantation of the shape memory anchor and facilitating the postoperative recovery of the patient.

[0021] Optionally, the threading hole is provided on the extension section.

[0022] Optionally, the center of the first tip, the center of the threading hole, and the midline of the extension section all coincide with the midline of the connecting section.

[0023] By adopting the above technical solution, the center of gravity of the shape memory anchor is located at the center of its structure, which can not only keep the shape memory anchor stable when implanted into the bone tunnel, but also improve the stability of the shape memory anchor after being implanted into the bone.

[0024] Optionally, the deformable wing is a deformable wing made of nickel-titanium alloy.

[0025] By adopting the above technical solution, nickel-titanium alloy has good plasticity, long fatigue life, wear resistance, corrosion resistance, and good medical properties. It can not only meet the requirement of reducing the volume of the shape memory anchor, but also meet the medical requirements, and can be well integrated with the bone after the shape memory anchor is implanted into the bone.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. By providing a connecting section and a deformable wing, the arc-shaped deformable wing can effectively reduce the overall volume of the shape memory anchor. The shape memory anchor with a smaller volume can not only reduce the amount of bone removed caused by opening the bone tunnel, reduce the damage to the bone, thus facilitating the good recovery of the patient after the operation, but also facilitate the implantation of the shape memory anchor into the bone.

[0028] 2. By providing an inclined deformable wing, the area of the deformable wing embedded in the bone can be effectively increased, thereby further enhancing the stability of the connection between the shape memory anchor and the bone, and further facilitating the success of the operation and promoting the recovery of the patient after the operation.

[0029] 3. By providing a threading hole, after the suture passes in and out of the threading hole, it is convenient to connect the suture with the shape memory anchor. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of a shape memory anchor under room temperature conditions in Embodiment 1;

[0031] Figure 2 is a schematic structural diagram of a shape memory anchor thermally expanded in Embodiment 1;

[0032] Figure 3 is a schematic structural diagram of a shape memory anchor under room temperature conditions in Embodiment 2;

[0033] Figure 4 is a schematic structural diagram of a shape memory anchor thermally expanded in Embodiment 2.

[0034] Description of the reference numerals: 1, connecting section; 11, first tip; 2, deformable wing; 21, second tip; 3, threading hole; 4, extension section. Detailed Description of the Embodiments

[0035] The following will further describe the present application in detail Figures 1-4 with reference to the accompanying drawings.

[0036] Embodiment 1:

[0037] A shape memory anchor disclosed in the present application combines Figure 1 and Figure 2 . The shape memory anchor body includes a connecting section 1 and two deformation wings 2 integrally formed on the connecting section 1. The two deformation wings 2 are symmetrically arranged on opposite sides of the connecting section 1. The shape memory anchor body is processed into a plate-like structure, which has good structural strength and is also convenient for processing.

[0038] The shape memory anchor is made of a shape memory material, such as nickel-titanium alloy. The deformation wings 2 are processed into an arc shape at room temperature. In this embodiment, the two arc-shaped deformation wings 2 are in an "S" shape. After the shape memory anchor is implanted into the bone tunnel on the bone, the shape memory anchor is heated by body temperature. After being heated, the deformation wings 2 of the shape memory anchor unfold, and the two deformation wings 2 and the connecting section 1 are in a flat shape. The unfolded deformation wings 2 are embedded into the bone tunnel under the tension of the connected suture, thereby completing the connection between the shape memory anchor and the bone. The arc-shaped deformation wings 2 help to reduce the overall width of the shape memory anchor, so that the arc-shaped deformation wings 2 can be implanted into the bone tunnel with a smaller aperture, so as to achieve the purpose of reducing damage to the bone.

[0039] Referring to Figure 2 , a first tip 11 is formed on the connecting section 1, and a second tip 21 is formed at one end of the deformation wing 2 away from the connecting section 1. The first tip 11 is located on the side of the connecting section 1 away from the second tip 21, and the first tip 11 is located on the center line of the connecting section 1. The edge of the shape memory anchor is inclined and smoothly arranged from the second tip 21 to the first tip 11, which is beneficial for the deformation wing 2 to smoothly embed into the bone.

[0040] When the shape memory anchor is implanted into the bone tunnel, the first tip 11 can reduce the area of the shape memory anchor corresponding to the bone tunnel orifice, so as to facilitate the implantation of the shape memory anchor into the bone tunnel. When the deformation wing 2 unfolds, the deformation wing 2 is combined with the arc shape and the second tip 21, which is beneficial for the deformation wing 2 to embed into the bone. In addition, it can also improve the connection stability between the shape memory anchor and the bone.

[0041] The edge of the deformation wing 2 is inclined from the second tip 21 to the center line of the connecting section 1. The inclined edge of the deformation wing 2 can not only facilitate the deformation wing 2 to embed into the bone, but also increase the area of the deformation wing 2 embedded into the bone, thereby improving the connection stability between the shape memory anchor and the bone.

[0042] Referring to Figure 2 , a threading hole 3 for threading a suture is formed on the connecting section 1, and the center of the orifice of the threading hole 3 coincides with the center line of the connecting section 1.

[0043] In actual use, at room temperature, after threading a suture through the threading hole 3, connect it to the shape memory anchor. Then, use an inserter to grip the side of the shape memory anchor away from the first tip 11 so as to implant the shape memory anchor into the bone tunnel. After the shape memory anchor is implanted into the bone tunnel, heat the shape memory anchor by body temperature. The deformation wings 2 gradually unfold from the arc state after being heated. After unfolding, they are inserted into the bone under the tension of the connected suture, thus completing the connection between the anchor and the bone.

[0044] Embodiment 2:

[0045] The difference between this embodiment and Embodiment 1 is that:

[0046] Combined with Figure 3 、 Figure 4 , the shape memory anchor further includes an extension section 4 integrally formed on the connection section 1. The extension section 4 is located on the side of the connection section 1 opposite to the first tip 11 and is located between the two deformation wings 2. The corners at the end of the extension section 4 away from the connection section 1 are processed into rounded corners, and the rounded corners effectively reduce the possibility of scratching the user's hand or other instruments during use.

[0047] Referring to Figure 3 , the threading hole 3 is opened at the middle position of the extension section 4, and the center line of the extension section 4, the center of the threading hole 3, and the center of the connection section 1 coincide.

[0048] Referring to Figure 4 , the edge of the connection section 1 from the first tip 11 to the adjacent part of the connection section 1 and the deformation wing 2 is processed into an arc, and the arc opening faces away from the connection section 1.

[0049] Referring to Figure 4 , the edge of the deformation wing 2 from the second tip 21 to the extension section 4 is processed into a circular arc, and the opening of the circular arc faces away from the deformation wing 2. The edge of the deformation wing 2 from the second tip 21 to the adjacent part of the deformation wing 2 and the connection section 1 is processed into an arc, and the arc opening faces the extension section 4.

[0050] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A shape memory anchor, characterized in that: The shape memory anchor body includes a connecting section (1) and at least two deformation wings (2) arranged on the connecting section (1); The deformation wing (2) is a deformation wing (2) made of shape memory material. The deformation wing (2) is arc-shaped at room temperature and unfolds after being heated; One end of the deformation wing (2) away from the connecting section (1) is processed into a second tip (21); The edge of the deformation wing (2) is inclined from the second tip (21) towards the midline of the connecting section (1); On the side of the connecting section (1) facing away from the second tip (21), it is processed into a first tip (11), and the edge of the first tip (11) smoothly transitions with the edge of the deformation wing (2); A threading hole (3) is formed in the shape memory anchor body; The shape memory anchor further includes an extension section (4) arranged on the connecting section (1), and the extension section (4) is located on the side of the connecting section (1) facing away from the first tip (11); The threading hole (3) is formed in the extension section (4); The two arc-shaped deformation wings (2) are in an S shape. After heating the deformation wings (2) by body temperature, the deformation wings (2) can unfold. After unfolding, the two deformation wings (2) and the connecting section (1) are in a flat shape.

2. The shape memory anchor according to claim 1, characterized in that: The centerlines of the first tip (11), the center of the threading hole (3), and the extension section (4) all coincide with the midline of the connecting section (1).

3. A shape memory anchor according to any one of claims 1-2, characterized in that: The deformation wing (2) is a deformation wing (2) made of nickel-titanium alloy.

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