Magnesium alloy anastomosis nail and preparation method thereof

Abstract

The application provides a preparation method of a magnesium alloy anastomosis nail and belongs to the technical field of medical materials. The preparation method comprises the following steps: subjecting a magnesium alloy material to melting and casting treatment to form a magnesium alloy ingot; subjecting the magnesium alloy ingot to homogenization heat treatment and extrusion treatment to form a magnesium alloy rod material; subjecting the magnesium alloy rod material to drawing treatment to form a magnesium alloy wire material; subjecting the magnesium alloy wire material to segmented rolling treatment to obtain a magnesium alloy wire material with multiple strengthening regions; and forming the magnesium alloy wire material subjected to the segmented rolling treatment into multiple magnesium alloy anastomosis nails with strengthening parts. The magnesium alloy wire material is subjected to segmented strengthening treatment by using a non-alloying method, the size of the wire material strengthening region can be controlled, the magnesium alloy anastomosis nail suitable for anastomosing tissues with different hardness and different thickness can be customized, the strength and hardness of the anastomosis nail can be improved, the requirement of penetrating part of a relatively thick or hard tissue can be met, and abnormal deformation in different degrees can be avoided.

Description

Magnesium alloy staples and their preparation methods Technical Field

[0001] This invention belongs to the field of medical materials technology, specifically relating to a magnesium alloy anastomosis staple and its preparation method. Background Technology

[0002] Anastomosing devices are commonly used tissue suturing instruments in clinical surgery. While currently used bio-inert titanium staples possess excellent mechanical properties, their inability to degrade in vivo still leads to a series of adverse effects. In recent years, the biodegradability of magnesium alloys in medical device applications has attracted attention for their use in surgery. The potential value of using magnesium alloy staples in colonic anastomosis and gastric wall closure has been validated in animal experiments. However, because the mechanical strength of biodegradable magnesium alloys is much lower than that of titanium alloys, varying degrees of abnormal deformation still occur when penetrating thicker or harder tissues, posing potential risks to the clinical use of staples.

[0003] Currently, there are methods to improve the mechanical strength of magnesium alloy wires through composition optimization, thereby enhancing the penetration and deformation capabilities of magnesium alloy staples. For example, adding rare earth elements, Zn, and Al to magnesium alloys can improve the overall mechanical strength of the staples and meet support requirements, but the staples still cannot meet the penetration requirements when penetrating thicker or harder structures. Furthermore, there are methods to improve the mechanical strength of magnesium alloy wires by changing processing techniques such as drawing and extrusion, but these methods have limited effect on improving the overall performance of magnesium alloy staples.

[0004] Based on this, the inventors, following the original idea of ​​improving the performance of wire materials to enhance the effect of staples, have discovered through long-term research that focusing on strengthening the local performance of staples is an effective solution to improve the required performance of staples. Therefore, a preparation method for locally strengthening staples is proposed. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art, and to provide a magnesium alloy staple and its preparation method.

[0006] In one aspect, the present invention provides a method for preparing magnesium alloy staples, the method comprising:

[0007] Magnesium alloy materials are smelted and cast to form magnesium alloy ingots;

[0008] The magnesium alloy ingot is subjected to homogenization heat treatment and extrusion treatment to form magnesium alloy rods;

[0009] The magnesium alloy rod is drawn to form a magnesium alloy wire;

[0010] The magnesium alloy wire is subjected to segmented rolling to obtain a magnesium alloy wire with multiple reinforced regions;

[0011] The magnesium alloy wire after segmented rolling is formed into multiple magnesium alloy staples with reinforced sections.

[0012] Optionally, the strain of the reinforcing portion on the magnesium alloy staple is 0.1%-5%.

[0013] Optionally, the length of the reinforcing portion in each magnesium alloy staple accounts for 1%-70% of the total length of the magnesium alloy staple.

[0014] Optionally, the reinforcing portion of the magnesium alloy staple is located at the staple leg portion.

[0015] Optionally, the homogenization heat treatment has a temperature range of 300℃-450℃ and a time range of 2h-48h.

[0016] Optionally, in the extrusion process, the extrusion ratio is (10-30):1, and the extrusion temperature range is 200℃-400℃.

[0017] Optionally, the diameter of the magnesium alloy rod ranges from 1 mm to 4 mm.

[0018] Optionally, the diameter of the magnesium alloy wire ranges from 0.01 mm to 0.5 mm; and / or,

[0019] The magnesium alloy wire has a tensile strength of 260MPa-350MPa and an elongation of 15%-30%.

[0020] Optionally, the magnesium alloy material is at least one of magnesium-aluminum alloy, magnesium-manganese alloy, magnesium-zinc alloy, magnesium-zirconium alloy, magnesium rare earth alloy, magnesium alkaline earth alloy, magnesium-lithium alloy, magnesium-calcium alloy, and magnesium-silver alloy.

[0021] In another aspect, the present invention provides a magnesium alloy staple, which is prepared using the magnesium alloy staple preparation method described above.

[0022] This invention proposes a magnesium alloy staple and its preparation method, which has the following advantages.

[0023] Effect:

[0024] 1. This invention adopts a segmented strengthening method for magnesium alloy wire, which can adjust the size of the wire strengthening area and customize magnesium alloy staples suitable for matching different hardness and thickness structures, so as to simultaneously improve the strength and hardness of the staples, meet the needs of penetrating thicker or harder structures, and avoid abnormal deformation of different degrees.

[0025] 2. This invention achieves local mechanical enhancement of magnesium alloy staples through a non-alloying method, which not only avoids the potential impact of alloying on human health, but also improves the tissue penetration ability of magnesium alloy staples, making the application range of magnesium alloy staples wider. Attached Figure Description

[0026] Figure 1 is a flowchart of a magnesium alloy staple and its preparation method according to an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the structure of a magnesium alloy stapler according to another embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of the formation of the magnesium alloy staples in Embodiment 1 of the present invention;

[0029] Figure 4 is a schematic diagram of the formation of the magnesium alloy staples in Embodiment 2 of the present invention;

[0030] Figure 5 is a schematic diagram of the formation of the magnesium alloy staples in Embodiment 3 of the present invention;

[0031] Figure 6 is a schematic diagram of the formation of magnesium alloy staples in Embodiment 4 of the present invention. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0033] Unless otherwise specifically stated, the technical or scientific terms used in this invention should be understood in their ordinary sense by one of ordinary skill in the art to which this invention pertains. The terms "comprising" or "including," as used in this invention, do not limit the shapes, numbers, steps, and / or groups thereof mentioned, nor do they exclude the appearance or inclusion of one or more other different shapes, numbers, steps, and / or groups thereof.

[0034] As shown in Figure 1, one aspect of the present invention provides a method S100 for preparing magnesium alloy staples, comprising the following steps S110 to S130:

[0035] S110. Magnesium alloy materials are smelted and cast to form magnesium alloy ingots.

[0036] Specifically, in this embodiment, the magnesium alloy material can be at least one of magnesium-aluminum alloy, magnesium-manganese alloy, magnesium-zinc alloy, magnesium-zirconium alloy, magnesium rare earth alloy, magnesium alkaline earth alloy, magnesium lithium alloy, magnesium-calcium alloy, and magnesium-silver alloy. That is to say, the selected material can be any of the above alloys, or it can be a multi-component magnesium alloy composed of the above systems.

[0037] S120: Magnesium alloy ingots are subjected to homogenization heat treatment and extrusion treatment to form magnesium alloy rods.

[0038] In step S120, the homogenization heat treatment temperature range is 300℃-450℃, and the time range is 2h-48h, in order to remove impurities and macroscopic defects from the surface of the magnesium alloy ingot.

[0039] Further, in step S120, during the extrusion process, the extrusion ratio is (10-30):1, and the extrusion temperature range is 200℃-400℃.

[0040] Furthermore, in step S120, the diameter of the magnesium alloy rod formed is 1mm-4mm.

[0041] S130: Magnesium alloy rods are drawn to form magnesium alloy wires.

[0042] In step S130, the drawing process is not specifically limited and can be either cold drawing or hot drawing. The drawing process enables the magnesium alloy wire to meet the following technical indicators: the magnesium alloy wire needs to simultaneously meet the requirements of tensile strength of 260MPa-350MPa and elongation of 15%-30% to increase the rigidity of the material, thereby increasing the penetration force of the staple and making it less prone to deformation under force.

[0043] Furthermore, in step S130, the diameter of the formed magnesium alloy wire ranges from 0.01 mm to 0.5 mm.

[0044] S140. The magnesium alloy wire is subjected to segmented rolling to obtain a magnesium alloy wire with multiple strengthening regions.

[0045] In step S140, the rolling method is not specifically limited. For example, twin-roll rolling or direct melting rolling can be used, eliminating the traditional heat treatment steps, reducing multiple heating and cooling steps, lowering energy loss, and simultaneously keeping the magnesium alloy wire within a certain temperature range to eliminate defects and impurities in the metal material and improve the mechanical properties of the wire. Of course, multi-roll rolling can also be used, with strict control over the length and strain of the rolling zone during processing.

[0046] It should be noted that the aforementioned reinforcing parts can be set at different locations on the staples as needed. The location of the reinforcing area on the magnesium alloy wire can be further determined based on the specific location of the reinforcing parts. Therefore, during the rolling process, the segmentation method should be planned and designed according to the effective length of the wire required to prepare the staples and the length and location of the reinforcing parts.

[0047] For example, the reinforcing portion is located on the leg portion of the staple, the total length of each staple is the effective length of the wire required to prepare the staple, and the length of the reinforcing portion in each staple accounts for 1%-70% of the total length of the staple. In this way, by rolling the area corresponding to the reinforcing portion of the staple on the magnesium alloy wire, an appropriate strain is applied, with a strain range of 0.1%-5%, so that the area becomes a reinforced area, and other areas do not need to be rolled, forming non-reinforced areas. That is, by segmented rolling on the magnesium alloy wire, multiple reinforced areas and multiple non-reinforced areas are formed at intervals.

[0048] Of course, it should be understood that there are no specific limitations on the length and strain of the reinforcing part on the staple. The length and strain of the reinforcing part on the staple leg can be specifically set according to the application environment of the staple, so as to optimize the microstructure of the staple, match the application requirements of different service environments for the penetration performance and mechanical properties of magnesium alloy staples, and broaden the application range of magnesium alloy staples.

[0049] S150, forming magnesium alloy staples with multiple reinforced sections from magnesium alloy wire after segmented rolling treatment.

[0050] Specifically, based on the length of the anastomosis staples and the length and position of the reinforcing part, magnesium alloy wire is formed into multiple U-shaped anastomosis staples, each of which has a reinforcing part, and is ultrasonically cleaned and then dried.

[0051] In some preferred embodiments, the total length of the magnesium alloy staple is 5mm-20mm, and the height of the magnesium alloy staple is 2mm-6mm. That is, the magnesium alloy wire is cut every 5mm-20mm to form an effective length corresponding to one staple. The middle part of the magnesium alloy wire is a non-reinforced area, and the two ends are reinforced areas. Then, the two ends of the magnesium alloy wire are bent to a height of 2mm-6mm to form a U-shaped staple. In this way, each leg of the staple has a reinforced part, and the strain of the reinforced part is 0.1%-5%.

[0052] In some other preferred embodiments, the reinforcement is located at the end of the magnesium alloy staple leg to increase the mechanical strength of the staple when penetrating tissue, so that it can be used stably in thicker or harder tissues. In other words, by strengthening the part or all of the staple leg, the mechanical penetration of the magnesium alloy staple can be effectively improved while taking into account its deformation capacity.

[0053] In this embodiment, local mechanical enhancement of magnesium alloy staples is achieved through a non-alloying method. This not only avoids the potential impact on human health caused by alloying of multi-component alloy materials, but also improves the tissue penetration ability of magnesium alloy staples, making the application range of magnesium alloy staples wider.

[0054] In another aspect, the present invention provides a magnesium alloy staple, which is prepared by the method for preparing magnesium alloy staples described above. For details of the process, please refer to the above description and will not be repeated here.

[0055] Specifically, as shown in Figure 2, the magnesium alloy staple 200 of this embodiment has a U-shaped structure, including a staple crown 210 and two staple legs 220 located at both ends of the staple crown 210 and extending on the same side. A reinforcing portion 230 is provided on a partial or all area of ​​the staple leg 220. The length of the reinforcing portion 230 accounts for 1%-70% of the total length of the staple 200, and the strain corresponding to the reinforcing portion 230 is 0.1%-5%.

[0056] In this embodiment, the length and strain of the reinforced part of the magnesium alloy staple are adjustable to customize magnesium alloy staples suitable for anastomosing tissues with different hardness and thickness, meeting the strength and elongation requirements of magnesium alloy staples under different service environments, and further meeting the penetration requirements of clinical applications. For example, the staple can be used as a biodegradable medical implant for tissue suturing and incision closure during surgery.

[0057] The preparation method of magnesium alloy staples will be further illustrated below with reference to several specific embodiments:

[0058] Example 1

[0059] The method for preparing the magnesium alloy staples in this example includes the following steps:

[0060] S1. Weigh the raw materials according to the weight percentage, melt them into liquid metal, cast them into ingots, and prepare magnesium-zinc alloy ingots with a zinc content of 2%.

[0061] S2. After homogenization treatment at 300℃ for 48 hours, surface impurities and macroscopic defects are removed from the magnesium-zinc alloy ingot. The ingot is then extruded to form a magnesium-zinc alloy rod with a diameter of 1 mm. The extrusion temperature is 400℃ and the extrusion ratio is 30:1.

[0062] S3. Magnesium-zinc alloy rods are cold-drawn into magnesium-zinc alloy wires with a diameter of 0.33 mm. The tensile strength of the magnesium-zinc alloy wires can reach 260 MPa, and the elongation is 30%.

[0063] S4. The magnesium-zinc alloy wire is rolled in sections according to the length required for preparing the staples using a twin-roll rolling method. The rolling strain of the magnesium-zinc alloy wire reinforcement area corresponding to the staple leg position reinforcement part is 1%.

[0064] S5. For each magnesium-zinc alloy staple, the length of the reinforced portion accounts for 33% of the total length of the actual magnesium-zinc alloy wire required for staple preparation. The segmented, rolled magnesium-zinc alloy wire is used to prepare U-shaped staples at corresponding positions according to the above dimensions. Finally, the staples are ultrasonically cleaned and dried. As shown in Figure 3, the reinforced region A on the magnesium-zinc alloy wire forms part of the staple leg 220 of the magnesium-zinc alloy staple 200, and the unreinforced region B on the magnesium-zinc alloy wire forms the staple crown 210 and other parts of the staple leg 220 of the staple 200. Figure 3 shows the formation process of three staples. Of course, it should be understood that more staples can be formed simultaneously based on the magnesium-zinc alloy wire; this is not specifically limited here.

[0065] As shown in Figure 3, the anastomosis staple 200 prepared in this embodiment 1 includes a staple crown 210 and two staple legs 220 located at both ends of the staple crown 210. The two staple legs 220 extend from the two ends of the staple crown 210 to the same side, and a reinforcing part 230 is provided on the staple leg 220. The total length of the anastomosis staple corresponds to the effective length of the magnesium-zinc alloy wire, and its length L is 14 mm. The staple height H of the anastomosis staple is 4.1 mm, the height of the reinforcing part is 2.31 mm, and the total length of the two reinforcing parts is 4.62 mm, accounting for 33% of the total length of the anastomosis staple.

[0066] Example 2

[0067] The method for preparing the magnesium alloy staples in this example includes the following steps:

[0068] S1. Weigh the raw materials according to the weight percentage, melt them into liquid metal, cast them into ingots, and prepare magnesium-calcium alloy ingots with a calcium content of 1%.

[0069] S2. After homogenization treatment at 400℃ for 10 hours, surface impurities and macroscopic defects are removed from the magnesium-calcium alloy ingot. The ingot is then extruded to form a magnesium-calcium alloy rod with a diameter of 2mm. The extrusion temperature is 300℃ and the extrusion ratio is 18:1.

[0070] S3. Magnesium-calcium alloy rods are cold-drawn into magnesium-calcium alloy wires with a diameter of 0.35 mm. The tensile strength of the magnesium-calcium alloy wires can reach 290 MPa, and the elongation is 18%.

[0071] S4. The magnesium-calcium alloy wire is rolled in sections according to the length required for preparing the staples using a twin-roll rolling method. The rolling strain corresponding to the strengthening part at the staple leg position is 0.5%.

[0072] S5. For each anastomotic staple, the length of the reinforced portion accounts for 46% of the total actual wire length required for staple preparation. The segmented rolled magnesium-zinc alloy wire is used to prepare U-shaped anastomotic staples at the corresponding positions according to the above dimensions. Finally, the staples are ultrasonically cleaned and dried. As shown in Figure 4, the reinforced region A on the magnesium-calcium alloy wire forms part of the staple leg 220 of the anastomotic staple 200, and the unreinforced region B on the magnesium-zinc alloy wire forms the staple crown 210 and other parts of the staple leg 220 of the anastomotic staple 200. Figure 4 shows the formation process of three anastomotic staples. Of course, it should be understood that more anastomotic staples can be formed simultaneously based on the magnesium-calcium alloy wire; this is not specifically limited here.

[0073] As shown in Figure 4, the anastomotic staple 200 prepared in this embodiment 2 includes a staple crown 210 and two staple legs 220 located at both ends of the staple crown 210. The two staple legs 220 extend from the two ends of the staple crown 210 to the same side, and a reinforcing part 230 is provided on the staple leg 220. The total length L of the anastomotic staple is 20 mm, the staple height H is 6 mm, the height of the reinforcing part is 4.6 mm, and the total length of the two reinforcing parts is 9.2 mm, accounting for 46% of the total length of the anastomotic staple.

[0074] Example 3

[0075] The method for preparing the magnesium alloy staples in this example includes the following steps:

[0076] S1. Weigh the raw materials according to the weight percentage, melt them into liquid metal, cast them into ingots, and prepare magnesium-zinc-yttrium alloy ingots with a zinc content of 3% and a yttrium content of 1%.

[0077] S2. After homogenization treatment at 450℃ for 4 hours, surface impurities and macroscopic defects are removed from the magnesium-zinc-yttrium alloy ingots. The ingots are then extruded to form magnesium-zinc-yttrium alloy rods with a diameter of 4 mm. The extrusion temperature is 200℃ and the extrusion ratio is 10:1.

[0078] S3. Magnesium-zinc-yttrium alloy rods are cold-drawn into magnesium-zinc-yttrium alloy wires with a diameter of 0.28 mm. The tensile strength of the magnesium-zinc-yttrium alloy wires can reach 350 MPa, while the elongation is 15%.

[0079] S4. The magnesium-zinc-yttrium alloy wire is rolled in sections according to the length required for preparing the staples using a three-roll rolling method. The rolling strain of the reinforcing part corresponding to the staple leg position is 5%.

[0080] S5. For each anastomotic staple, the length of the reinforced portion accounts for 52% of the total length of the actual magnesium-zinc-yttrium alloy wire required for staple preparation. The segmented, rolled magnesium-zinc-yttrium alloy wire is used to prepare U-shaped anastomotic staples at corresponding positions according to the above dimensions. Finally, the staples are ultrasonically cleaned and dried. As shown in Figure 5, the reinforced region A on the magnesium-zinc-yttrium alloy wire forms part of the staple leg 220 of the anastomotic staple 200, and the unreinforced region B on the magnesium-zinc-yttrium alloy wire forms the staple crown 210 and other parts of the staple leg 220 of the anastomotic staple 200. Figure 5 shows the formation process of three anastomotic staples. Of course, it should be understood that more anastomotic staples can be formed simultaneously using magnesium-zinc-yttrium alloy wire, which is not specifically limited here.

[0081] As shown in Figure 5, the anastomotic staple 200 prepared in this embodiment 3 includes a staple crown 210 and two staple legs 220 located at both ends of the staple crown 210. The two staple legs 220 extend from the two ends of the staple crown 210 to the same side, and a reinforcing part 230 is provided on the staple leg 220. The total length L of the anastomotic staple is 7 mm, the staple height H is 2 mm, the height of the reinforcing part is 1.82 mm, and the total length of the two reinforcing parts is 3.64 mm, accounting for 52% of the total length of the anastomotic staple.

[0082] Example 4

[0083] The method for preparing the magnesium alloy staples in this example includes the following steps:

[0084] S1. Weigh the raw materials according to the weight percentage, melt them into liquid metal, cast them into ingots, and prepare magnesium-zinc-manganese alloy ingots with a zinc content of 2% and a manganese content of 1%.

[0085] S2. After homogenization treatment at 290℃ for 8 hours, surface impurities and macroscopic defects are removed from the magnesium-zinc-manganese alloy ingots. The ingots are then extruded to form magnesium-zinc-manganese alloy rods with a diameter of 1.6 mm. The extrusion temperature is 380℃ and the extrusion ratio is 24:1.

[0086] S3. Magnesium-zinc-manganese alloy rods are cold-drawn into magnesium-zinc-manganese alloy wires with a diameter of 0.23 mm. The tensile strength of the magnesium-zinc-manganese alloy wires can reach 300 MPa, while the elongation is 21%.

[0087] S4. The magnesium-zinc-manganese alloy wire is rolled in sections according to the length required for the preparation of the staples using a three-roll rolling method. The rolling strain corresponding to the reinforced part at the staple leg position is 2%.

[0088] S5. For each anastomotic staple, the length of the reinforced portion accounts for 70% of the total actual wire length required for staple preparation. The segmented rolled magnesium-zinc-manganese alloy wire is used to prepare U-shaped anastomotic staples at the corresponding positions according to the above dimensions. Finally, the staples are ultrasonically cleaned and dried. As shown in Figure 6, the reinforced region A on the magnesium-zinc-manganese alloy wire forms part of the staple leg 220 of the anastomotic staple 200, and the unreinforced region B on the magnesium-zinc-manganese alloy wire forms the staple crown 210 and other parts of the staple leg 220 of the anastomotic staple 200. Figure 6 shows the formation process of three anastomotic staples. Of course, it should be understood that more anastomotic staples can be formed simultaneously based on the magnesium-zinc-manganese alloy wire; this is not specifically limited here.

[0089] As shown in Figure 6, the anastomotic staple 200 prepared in this embodiment 4 includes a staple crown 210 and two staple legs 220 located at both ends of the staple crown 210. The two staple legs 220 extend from the two ends of the staple crown 210 to the same side, and a reinforcing part 230 is provided on the staple leg 220. The total length L of the anastomotic staple is 11 mm, the staple height H is 3.9 mm, the height of the reinforcing part is 3.85 mm, and the total length of the two reinforcing parts is 7.7 mm, accounting for 70% of the total length of the anastomotic staple.

[0090] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for preparing a magnesium alloy staple, characterized in that, The preparation method includes: melting and casting magnesium alloy material to form magnesium alloy ingots; homogenizing and heat-treating the magnesium alloy ingots and extruding them to form magnesium alloy rods; drawing the magnesium alloy rods to form magnesium alloy wires; and performing segmented rolling processing on the magnesium alloy wires to form multiple reinforced regions and multiple unreinforced regions spaced apart, including: applying strain to the regions of the magnesium alloy wires corresponding to the reinforced parts of the staples to form reinforced regions, thereby obtaining magnesium alloy wires with multiple reinforced regions; the strain of the reinforced regions is 0.1%-5%; and forming multiple magnesium alloy staples with reinforced parts from the segmented rolling magnesium alloy wires.

2. The preparation method according to claim 1, characterized in that, The length of the reinforcing portion on each magnesium alloy staple accounts for 1%-70% of the total length of the magnesium alloy staple.

3. The preparation method according to claim 2, characterized in that, The reinforcing portion of the magnesium alloy staple is located at the staple leg portion.

4. The preparation method according to claim 1, characterized in that, The homogenization heat treatment has a temperature range of 300℃-450℃ and a time range of 2h-48h.

5. The preparation method according to claim 1, characterized in that, In the extrusion process, the extrusion ratio is (10-30):1, and the extrusion temperature range is 200℃-400℃.

6. The preparation method according to claim 1, characterized in that, The diameter of the magnesium alloy rod ranges from 1 mm to 4 mm.

7. The preparation method according to claim 1, characterized in that, The diameter of the magnesium alloy wire is in the range of 0.01mm-0.5mm; and / or the tensile strength of the magnesium alloy wire is 260MPa-350MPa, and the elongation is 15%-30%.

8. The preparation method according to claim 1, characterized in that, The magnesium alloy material is at least one of magnesium-aluminum alloy, magnesium-manganese alloy, magnesium-zinc alloy, magnesium-zirconium alloy, magnesium rare earth alloy, magnesium alkaline earth alloy, magnesium-lithium alloy, magnesium-calcium alloy, and magnesium-silver alloy.

9. A magnesium alloy staple, characterized in that, The magnesium alloy staples were prepared using the method described in any one of claims 1 to 8.

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