Degradable magnesium alloy bone screw

Abstract

The utility model discloses degradable magnesium alloy bone screw relates to medical instrument technical field, and the screw body is characterized by comprising screw body, a point and b point of two ends of screw body are respectively nail body and nail head, screw body is made of degradable magnesium alloy, first connecting hole and second double round head groove are seted up in a point, the radius of screw body is 620mm, the a point end of screw body is gradually changed and is arranged to b point direction, screw body is made of degradable magnesium alloy, and material can be self degradation, need not secondary operation to take out, alleviate the patient's distress and economic burden, through the arc shape setting of screw body, can better and the bone between install, improve fixed stability, promote bone healing, and the reasonable control degradation rate has promoted the fracture treatment effect.

Description

Technical Field

[0001] This utility model specifically relates to the field of medical device technology, and more specifically to biodegradable magnesium alloy bone screws. Background Technology

[0002] Metal bone screws commonly used for fracture fixation are mostly made of stainless steel or titanium alloy. Although these materials have good mechanical properties, they require a second surgery to remove them after fracture healing, increasing patient pain and financial burden. Traditional non-degradable polymer bone screws have insufficient mechanical properties and cannot meet the needs of complex fracture fixation. Degradable magnesium alloy, as a new type of biomaterial, has good biocompatibility and gradual degradation characteristics. However, existing degradable magnesium alloy bone screws have shortcomings in structural design and performance optimization, such as poor fixation stability, unreasonable degradation rate control, and limited effect on promoting bone healing. Currently, the mechanical properties of traditional biodegradable magnesium alloy bone screws are inferior to those of traditional metal bone screws, which may lead to loosening, displacement, or breakage of the implant, affecting the stability of fracture fixation. This may cause secondary injury to the patient during rehabilitation. Utility Model Content

[0003] The purpose of this invention is to provide a biodegradable magnesium alloy bone screw. In this device, the structure is optimized to improve fixation stability, rationally control the degradation rate, enhance the ability to promote bone healing, avoid secondary surgery for removal, and improve the treatment effect of fractures, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A biodegradable magnesium alloy bone screw includes a screw body; points a and b at both ends of the screw body are the screw body and the screw head, respectively; the screw body is made of biodegradable magnesium alloy; a first connecting hole and a second double round head groove are provided at point a; The radius of the screw body is 620mm; the screw body has a gradual transition from point a to point b. As a further technical solution of this utility model, two first connecting holes are provided; the second double round head groove is disposed between the two first connecting holes; the two first connecting holes and the second double round head groove are coaxial. As a further technical solution of this utility model, at least three second connecting holes are opened at point b, and they are arranged in sequence; a first double round head groove is opened at the end of point b near point a; the first double round head groove is coaxially arranged with the multiple second connecting holes. As a further technical solution of this utility model, the length of the screw body is 45cm; wherein the diameter of point b is 0.35 times the diameter of point a; As a further technical solution of this utility model, the first connecting hole, the second connecting hole, the first double round head groove and the second double round head groove are all countersunk holes; and the edges are chamfered at 0.15°. Compared with the prior art, the beneficial effects of this utility model are: This invention features a screw body made of biodegradable magnesium alloy, which can degrade on its own; it eliminates the need for secondary surgery to remove the screw, reducing patient pain and financial burden. This invention, by arranging the screw body in an arc shape, allows for better contact with the bone during installation, improving fixation stability, promoting bone healing, and rationally controlling the degradation rate, thereby enhancing the treatment effect of fractures. Attached Figure Description

[0005] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0006] Figure 2 This utility model Figure 1 Top view.

[0007] In the figure: 1-screw body, 2-first connecting hole, 3-second connecting hole, 4-first double round head groove, 5-second double round head groove. Detailed Implementation

[0008] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0009] Please see Figure 1-2 In this embodiment of the utility model, the biodegradable magnesium alloy bone screw includes a screw body 1; points a and b at both ends of the screw body 1 are the screw body and the screw head, respectively; the screw body 1 is made of biodegradable magnesium alloy; a first connecting hole 5 and a second double round head groove 2 are provided at point a. The radius of the screw body 1 is 620mm; the screw body 1 has a gradually changing shape from point a to point b. By adopting the above technical solution, two first connecting holes 5 are provided; the second double round head groove 2 is disposed between the two first connecting holes 5; the two first connecting holes 5 and the second double round head groove 2 are coaxial. In this embodiment, two first connecting holes 2 are provided; the second double round head groove 5 is disposed between the two first connecting holes 2; the two first connecting holes 2 and the second double round head groove 5 are coaxial; In this embodiment, there are at least three second connecting holes 3 at point b, arranged in sequence; a first double round head groove 4 is provided at the end of point b near point a; the first double round head groove 4 is coaxially arranged with the multiple second connecting holes 3. By adopting the above technical solution, by opening connecting holes at both ends of the screw body 1, the stability of the connection is effectively guaranteed, thereby ensuring the effect of accelerating degradation. Furthermore, the length of the screw body 1 is 45cm; wherein the diameter of point b is 0.35 times the diameter of point a; In this embodiment, the first connecting hole 5, the second connecting hole 3, the first double round head groove 4, and the second double round head groove 2 are all countersunk holes; and the edges are chamfered at 0.15°. By adopting the above technical solutions, the chamfer design prevents tools from slipping during operation, avoids damage to the nail head, and improves the convenience of operation and the service life of the screw; The working principle of this utility model is as follows: by effectively fixing the screw body 1 to the bone, elements such as zinc and calcium are contained in the degradable magnesium alloy; the addition of elements such as zinc and calcium optimizes the mechanical properties and biocompatibility of the magnesium alloy, and improves its corrosion resistance and degradation uniformity. The screw body 1 has a gradual transition from point a to point b, which makes it easier for the front end of the screw body 1 to cut into the bone and increases the contact area between the rear end and the bone, thereby improving the holding force and fixation stability and adapting to the fixation needs of different bone tissues. The second double round head groove 2 and the first double round head groove 4 opened at points a and b effectively increase the contact area, thereby improving the consumption of degradation, ensuring the quality and efficiency of healing, and reducing the patient's pain.

[0010] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0011] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A biodegradable magnesium alloy bone screw, characterized in that: Includes a screw body (1); points a and b at both ends of the screw body (1) are the screw body and the screw head, respectively; the screw body (1) is made of biodegradable magnesium alloy; a first connecting hole (5) and a second double round head groove (2) are provided at point a. The screw body (1) has a radius of 620 mm; the screw body (1) has a gradually changing shape from point a to point b.

2. The biodegradable magnesium alloy bone screw according to claim 1, characterized in that: The first connecting hole (5) has two openings; the second double round head groove (2) is set between the two first connecting holes (5); the two first connecting holes (5) and the second double round head groove (2) are coaxial.

3. The biodegradable magnesium alloy bone screw according to claim 1, characterized in that: There are at least three second connecting holes (3) at point b, arranged in sequence; a first double round head groove (4) is provided at the end of point b near point a; the first double round head groove (4) is coaxially arranged with the multiple second connecting holes (3).

4. The biodegradable magnesium alloy bone screw according to claim 3, characterized in that: The length of the screw body (1) is 45cm; the diameter of point b is 0.35 times the diameter of point a.

5. The biodegradable magnesium alloy bone screw according to claim 4, characterized in that: The first connecting hole (5), the second connecting hole (3), the first double round head groove (4) and the second double round head groove (2) are all countersunk holes; and the edges are chamfered at 0.15°.

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