Anti-loosening orthopedic anchor

Abstract

The utility model relates to an anti-loosening orthopedic anchor, which comprises a first anchor body, a second anchor body and a third anchor body, the first anchor body comprises a threaded end and an assembling end which are oppositely arranged, and a first cavity which is arranged in the threaded end and the assembling end and penetrates through the threaded end; and the second nail body is connected with the assembling end and is provided with a second cavity communicated with the first cavity. Compared with the prior art, the utility model has the advantages that the postoperative stability is greatly enhanced, and looseness and a series of complications are prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of orthopedic implantation, in particular to an anti-loosening orthopedic anchor. Background Art

[0002] Titanium alloys are widely used in metal implants due to their combination of high specific strength and excellent biocompatibility. However, due to their inherent characteristics, poor biotribological behavior limits their further development in orthopedic implants, far from meeting the requirements of most patients. As the most common complication, how to avoid postoperative bone screw loosening has always been the difficulty and most concerned challenge in fracture fixation technology. How to improve the stability of the bone-nail interface and improve the bite force of the bone screw on the surrounding bone tissue and the surrounding bone healing during bone healing without destroying the surrounding blood supply and soft tissue faces huge challenges.

[0003] For example, CN115517752B discloses an implantable bone screw and a knot-free bone setting system, which aims to solve the problems of poor guiding accuracy during bone setting, soft tissue damage at the fracture site, and the inability of bone screws to fix and repair. The implantable bone screw includes a hollow body and a core rod installed inside the hollow body. The hollow body includes a first chamber and a second chamber connected to each other. The core rod includes a first action section matched with the first chamber and a second action section matched with the second chamber. The present application can be implanted along the positioning needle through the setting of the hollow body, accurately fix the injured part, and has high guiding accuracy, effectively reducing damage to the fracture area. The present application can provide pressure between different areas of the bone, making multiple areas easy to heal. The hollow body in the present application has good plasticity and radiotransparency, and does not need to be removed during clinical examination and diagnosis, which significantly improves the visualization of bones and joint spaces. However, when the application degrades in the body, it is inevitable that the fracture site will not grow well, and the bone screw has been partially degraded, resulting in loosening of the bone screw at the insertion site, thereby causing a series of complications. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-loosening orthopedic anchor in order to overcome the defects of the above-mentioned prior art. The anchor greatly enhances the postoperative stability, prevents the loosening and a series of complications.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] An anti-loosening orthopedic anchor, comprising:

[0007] A first nail body, comprising a threaded end and an assembly end, and a first cavity disposed inside the threaded end and the assembly end and penetrating the threaded end;

[0008] And a second nail body connected to the assembly end, which has a second cavity communicated with the first cavity.

[0009] Furthermore, a plurality of first positioning holes evenly distributed along the axial direction are provided on the outer surface of the second nail body, and the first positioning holes are communicated with the second cavity.

[0010] Furthermore, a micro-channel is provided inside the second nail body, one end of which is connected to the first cavity and the other end of which is against the inner wall of the second cavity in a direction away from the first cavity.

[0011] Furthermore, the maximum diameter of the first cavity is not greater than the maximum diameter of the microchannel, and the maximum diameter of the second cavity is greater than the maximum diameter of the first cavity.

[0012] Furthermore, the outer surface of the second nail body is a rough surface.

[0013] Furthermore, a plurality of raised positioning holes and recessed positioning holes are unevenly distributed on the rough surface, and the raised portions of the raised positioning holes intersect with the threaded ends along the extension lines of the axial direction of the second cavity.

[0014] Furthermore, the protruding positioning hole and the recessed positioning hole are connected to the second cavity.

[0015] Furthermore, the front end of the threaded end gradually increases in size along the axial direction and the rear end has a maximum diameter equal to that of the front end, and the assembly end is integrally formed with the second nail body.

[0016] Furthermore, the maximum diameter of the threaded end is equal to the maximum diameter of the assembly end, and the maximum diameter of the threaded end is not less than the maximum diameter of the second nail body.

[0017] Furthermore, a plurality of first threads are distributed on the threaded end, a plurality of second threads are distributed between two adjacent first threads, and a diameter of the first thread is greater than a maximum diameter of the second thread.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. After the threaded end provided by the present application is nailed in, the bone marrow blood at the fracture site will slowly flow into the first cavity and the second cavity. The slow growth improves the stability of the anchor. In addition, the actual length of the anchor is extremely small, and the part of the tissue that grows into the anchor will not cause harm to the human body when it is removed.

[0020] 2. The first positioning hole provided in the present application speeds up the entry of bone marrow blood, making the overall stability of the anchor uniform, preventing bone marrow blood or bone debris from being blocked in the first cavity, resulting in no bone marrow blood entering the second cavity, preventing the formation of a structure with one end stable and the other end loose, preventing inflammatory complications, and promoting healing of multiple sites together.

[0021] 3. The micro-channels provided in the present application enable the second nail body to form a structure of a large hole inside a small hole. This multi-level channel structure, on the one hand, enhances the overall structural stability of the second nail body. On the other hand, when the new tissue at the fracture end grows in, a multi-layer structure of anchor-tissue-anchor-tissue is formed, which enhances the stability of the anchor and increases the retention of the anchor. At the same time, a micro-channel is set inside to divide the new tissue, so that the new tissue enriched inside the second nail body is not too much, which is more conducive to the removal of the anchor after the fracture recovery and reduces the patient's pain.

[0022] 4. The rough outer surface of the second nail body provided in the present application increases the contact area between the new tissue at the fracture site and the second nail body. While the contact area is increased, the friction between the new tissue and the second nail body is strengthened. When the patient performs strenuous exercise, the increased friction prevents the local loosening of the anchor nail, strengthens the stability of the anchor nail, and the formed new tissue presents an irregular pattern in the cross section. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the anchor in Example 1.

[0024] Figure 2 This is a schematic diagram of the second nail body structure of the anchor nail in Example 1.

[0025] Figure 3 Schematic diagram of the first nail body structure of the anchor nail in Example 1 and Example 2.

[0026] Figure 4 This is a schematic diagram of the second nail body structure of the anchor nail in Example 2.

[0027] Figure 5 This is a schematic diagram of the structure of the anchor in Example 2.

[0028] 1-first nail body, 101-threaded end, 102-assembly end, 103-first cavity, 104-first thread, 105-second thread, 2-second nail body, 201-second cavity, 202-first positioning hole, 203-microchannel, 204-convex positioning hole, 205-concave positioning hole. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0030] Features such as component models, material names, connection structures, control methods, etc. that are not clearly stated in this technical solution shall be deemed as common technical features disclosed in the prior art.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, "multiple" means two or more than two, unless otherwise specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a bolt connection or a welding connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Common metal implants often cause bone screw loosening during the healing process due to their poor biofriction. In order to improve the stability of the bone-nail interface and to increase the bite force of the bone screw on the surrounding bone tissue and the surrounding bone healing during the bone healing process without damaging the surrounding blood supply and soft tissue, the present application embodiment provides an anti-loosening orthopedic anchor. The structure of the anchor can be found in Figures 1 to 5 As shown, it includes: a first nail body 1, which includes a threaded end 101 and an assembly end 102, and a first cavity 103 arranged inside the threaded end 101 and the assembly end 102 and penetrating the threaded end 101; and a second nail body 2 connected to the assembly end 102, which has a second cavity 201 connected to the first cavity 103.

[0034] Specifically, the first nail body 1 is first nailed into the fracture, and the threaded end 101 first contacts the skin at the fracture, that is, after the front end of the threaded end 101 is nailed into the fracture, the second nail body 2 is nailed into the channel formed by the nailing of the threaded end 101. After the threaded end 101 is nailed in, the bone marrow blood at the fracture will slowly flow into the first cavity 103 and the second cavity 201. The slow growth improves the stability of the anchor, and the actual length of the anchor is extremely small, such as 50 microns. At this time, the part of the tissue that grows into the anchor will not cause harm to the human body when it is removed.

[0035] Of course, anchors of this precision can be made in one piece using 3D printing technology. For example, first use 3D software to design a three-dimensional model of the anchor, import the designed three-dimensional model into the slicing software, decompose it into a series of thin slices, and determine the printing parameters, such as layer height, printing speed, material type, etc. Load the path file into the metal 3D printer, start printing, and after printing is completed, remove the powder remaining on the surface, use sandblasting to treat the metal surface, and perform heat treatment under vacuum to release internal stress. The specific detailed parameters are not described here, and those skilled in the art should understand that this method is a conventional setting.

[0036] In one embodiment, if Figure 1 and Figure 2 As shown, a plurality of first positioning holes 202 evenly distributed along the axial direction are provided on the outer surface of the second nail body 2 , and the first positioning holes 202 are communicated with the second cavity 201 .

[0037] When the above technical solution is implemented, optionally, the first positioning holes 202 are evenly distributed in one row, two rows, three rows, or four rows along the axial direction, and can be distributed in multiple rows according to the size of the first positioning holes 202. After the threaded end 101 is nailed in, the second nail body 2 also enters the channel formed by the nailing of the threaded end 101. The bone marrow blood enters the second cavity 202 from the first cavity 103, and can also enter the second cavity 201 from the first positioning hole 202, which speeds up the entry speed of the bone marrow blood, makes the overall stability of the anchor nail uniform, prevents the bone marrow blood or bone residue from being blocked in the first cavity 103, resulting in no bone marrow blood entering the second cavity 202, prevents one end from being stable and the other end from being loose, prevents inflammation complications, and promotes healing of multiple places together.

[0038] In one embodiment, if Figure 2 As shown, a micro-channel 203 is provided inside the second nail body 2 , one end of which is connected to the first cavity 103 and the other end of which is against the inner wall of the second cavity 201 in a direction away from the first cavity 103 .

[0039] Specifically, the maximum diameter of the first cavity 103 is not greater than the maximum diameter of the microchannel 203 , and the maximum diameter of the second cavity 201 is greater than the maximum diameter of the first cavity 103 .

[0040] It should be noted that the microchannel 203 is arranged along the axis of the second cavity 201, wherein the microchannel 203 is vertically connected to the first cavity 103. Of course, the diameter of the second cavity 201 is larger than the maximum diameter of the microchannel 203. The arrangement of the microchannel 203 enables the second nail body 2 to form a structure of a large hole within a small hole. This multi-level channel structure, on the one hand, enhances the overall structural stability of the second nail body 2, and on the other hand, forms a multilayer structure of anchor-tissue-anchor-tissue when new tissue grows in at the fracture end, thereby enhancing the stability of the anchor and increasing the retention of the anchor. At the same time, a microchannel 203 is arranged inside to divide the new tissue, so that the new tissue enriched inside the second nail body 2 is not too much, which is more conducive to the removal of the anchor after fracture recovery and alleviates the patient's pain. The diameter of the first cavity 103 is less than or equal to the microchannel 202, that is, the diameter of the first cavity 103 is set to be smaller, mainly to prevent some bone debris from entering the first cavity 103 during the screwing process of the threaded end 101, blocking the first cavity 103, so that no bone marrow blood enters the front end of the first cavity 103, resulting in no new tissue enrichment and growth at the fracture end inside the first cavity 103, making it impossible to form a stable joint structure of tissue-anchor nails, and unable to enhance the stability of the anchor nail, resulting in one end being stable and the other end being loose, leading to inflammation complications. Therefore, the diameter of the first cavity 103 satisfies the requirement that bone debris and the like do not enter the first cavity 103, and of course, the diameter of the second cavity 201 is greater than the maximum diameter of the microchannel 203.

[0041] In one embodiment, if Figure 4 As shown, the outer surface of the second nail body 2 is a rough surface.

[0042] In the above technical solution, the rough surface of the outer surface of the second nail body 2 increases the contact area between the new tissue at the fracture site and the second nail body 2. While the contact area is increased, the friction between the new tissue and the second nail body 2 is strengthened. When the patient performs strenuous exercise, the increased friction prevents the local loosening of the anchor nail, strengthens the stability of the anchor nail, and the formed new tissue presents an irregular pattern in the cross section.

[0043] In a specific embodiment, Figure 4 As shown, a plurality of raised positioning holes 204 and recessed positioning holes 205 are unevenly distributed on the rough surface, and the raised portion of the raised positioning hole 204 intersects with the threaded end 101 along the axial extension line of the second cavity 201, and the raised positioning hole 204 and the recessed positioning hole 205 are connected to the second cavity 201.

[0044] During use, the rough surface is formed by using the raised positioning hole 204 and the recessed positioning hole 205. Specifically, the raised positioning hole 204 is cylindrical with a diameter gradually decreasing in the direction away from the second nail body 2. On the contrary, the recessed positioning hole 205 is "bowl" shaped with a diameter gradually decreasing in the direction close to the second cavity 201. When new tissue grows at the fracture site, the new tissue enters the raised positioning hole 204 along the outer surface of the second nail body 2 and extends into the second cavity 201. The new tissue gradually surrounds the outer surface formed by the raised positioning hole 204. At the same time, the new tissue also enters the recessed positioning hole 205 along the outer surface of the second nail body 2, fills the recessed positioning hole 205 and enters the second cavity 201 along the aperture of the recessed positioning hole 205. In this way, the formed tissue-second nail body 2 support structure has extremely strong stability.

[0045] In one embodiment, if Figure 1 As shown, the front end of the threaded end 101 gradually increases in size along the axial direction and the rear end has the same maximum diameter as the front end, and the assembly end 102 is integrally formed with the second nail body 2 .

[0046] Specifically, the front end of the threaded end 101 is sharp, and the first cavity 103 extends to the center of the sharp shape. The sharp design facilitates the insertion of the anchor into the fracture and facilitates the installation of the hole. In addition, since the anchor is integrally formed and can be produced by 3D printing, the assembly end 102 and the second nail body 2 are integrally formed to improve the overall structural stability of the anchor and prevent the anchor from cracking locally.

[0047] In one embodiment, if Figure 1 As shown, the maximum diameter of the threaded end is equal to the maximum diameter of the assembly end 102 , and the maximum diameter of the threaded end 101 is not less than the maximum diameter of the second nail body 2 .

[0048] In the above technical solution, the diameter of each part is limited, wherein the diameter of the second nail body 2 needs to be no larger than the maximum diameter of the threaded end 101. Since no threads are designed on the outside of the second nail body 2, when the diameter of the second nail body 2 is too large, it cannot enter the channel formed by screwing the threaded end 101, resulting in an unsuccessful operation.

[0049] In one embodiment, if Figure 4 and Figure 5 As shown, a plurality of first threads 104 are distributed on the threaded end 101 , a plurality of second threads 105 are distributed between two adjacent first threads 104 , and the diameter of the first threads 104 is greater than the maximum diameter of the second threads 105 .

[0050] In the above technical scheme, the thread end 101 is refined and divided into multiple threads connected in parallel, among which the first thread 104 plays a major screw-in role, and the second thread 105 serves to increase the stability between the new tissue and the first nail body 1. When the thread end 101 is screwed into the fracture, the new tissue grows between two adjacent first threads 104, forming a multilayer structure of new tissue-first thread 104-new tissue-second thread 104-new tissue-first thread 104-new tissue. Optionally, the diameter of the second thread 105 can be set in multiple ways, and its maximum diameter only needs to be smaller than the first thread 104. Optionally, the second thread 105 can be set in multiple ways between the two first threads 104, further increasing the number of layers of the multilayer structure, and the second threads 105 with different diameters also further enhance the cross-sectional curvature of the formed new tissue and enhance the structural stability.

[0051] It should be noted that the second nail body 2 is provided with a nail cap at one end away from the first nail body 1, which is used to match the nail remover and the nail inserter. It will not be described in detail in this application and is a conventional setting in the field.

[0052] The above embodiments may be implemented individually or in any combination of two or more.

[0053] The above implementation is described in more detail below with reference to specific examples.

[0054] Example 1

[0055] Common metal implants often cause bone screw loosening during the healing process due to their poor biofriction. In order to improve the stability of the bone-screw interface and to increase the bite force of the bone screw on the surrounding bone tissue and the surrounding bone healing during the bone healing process without damaging the surrounding blood supply and soft tissue, this embodiment provides an anti-loosening orthopedic anchor. The structure of the anchor can be found in Figures 1 to 3 As shown, it includes: a first nail body 1, which includes a threaded end 101 and an assembly end 102 arranged oppositely, and a first cavity 103 arranged inside the threaded end 101 and the assembly end 102 and penetrating the threaded end 101; and a second nail body 2 connected to the assembly end 102, which has a second cavity 201 connected to the first cavity 103, the front end of the threaded end 101 gradually increases in the axial direction and the rear end is equal to the maximum diameter of the front end, the assembly end 102 and the second nail body 2 are integrally formed, the maximum diameter of the threaded end is equal to the maximum diameter of the assembly end 102, the maximum diameter of the threaded end 101 is not less than the maximum diameter of the second nail body 2, a plurality of first threads 104 are distributed on the threaded end 101, a plurality of second threads 105 are distributed between two adjacent first threads 104, and the diameter of the first thread 104 is greater than the maximum diameter of the second thread 105.

[0056] Among them, the outer surface of the second nail body 2 is a smooth surface, and the outer surface of the second nail body 2 is provided with a plurality of first positioning holes 202 evenly distributed along the axial direction, the first positioning holes 202 are connected to the second cavity 201, and the second nail body 2 is provided with a micro-channel 203 at one end connected to the first cavity 103 and the other end against the inner wall of the second cavity 201 away from the first cavity 103, the maximum diameter of the first cavity 103 is not greater than the maximum diameter of the micro-channel 203, and the maximum diameter of the second cavity 201 is greater than the maximum diameter of the first cavity 103.

[0057] When in use, the first nail body 1 is first nailed into the fracture, and the threaded end 101 first contacts the skin at the fracture, that is, after the front end of the threaded end 101 is nailed into the fracture, the second nail body 2 is nailed into the channel formed by the threaded end 101. After the threaded end 101 is nailed in, the bone marrow blood at the fracture will slowly flow into the first cavity 103 and the second cavity 201. The slow growth improves the stability of the anchor, and the actual length of the anchor is extremely small, only 50 microns. At this time, the part of the tissue that grows into the anchor will not cause harm to the human body when it is removed.

[0058] Example 2

[0059] Compared with the embodiment 1, most of them are the same, except that the outer surface of the second nail body 2 in the embodiment 1 is a rough surface.

[0060] Example 3

[0061] Common metal implants often cause bone screw loosening during the healing process due to their poor biofriction. In order to improve the stability of the bone-screw interface and to increase the bite force of the bone screw on the surrounding bone tissue and the surrounding bone healing during the bone healing process without damaging the surrounding blood supply and soft tissue, this embodiment provides an anti-loosening orthopedic anchor. The structure of the anchor can be found in Figure 3 , Figure 4 and Figure 5 As shown, it includes: a first nail body 1, which includes a threaded end 101 and an assembly end 102 arranged oppositely, and a first cavity 103 arranged inside the threaded end 101 and the assembly end 102 and penetrating the threaded end 101; and a second nail body 2 connected to the assembly end 102, which has a second cavity 201 connected to the first cavity 103, the front end of the threaded end 101 gradually increases in the axial direction and the rear end is equal to the maximum diameter of the front end, the assembly end 102 and the second nail body 2 are integrally formed, the maximum diameter of the threaded end is equal to the maximum diameter of the assembly end 102, the maximum diameter of the threaded end 101 is not less than the maximum diameter of the second nail body 2, a plurality of first threads 104 are distributed on the threaded end 101, a plurality of second threads 105 are distributed between two adjacent first threads 104, and the diameter of the first thread 104 is greater than the maximum diameter of the second thread 105.

[0062] Among them, the outer surface of the second nail body 2 is a rough surface, and a number of raised positioning holes 204 and recessed positioning holes 205 are unevenly distributed on the rough surface. The raised part of the raised positioning hole 204 intersects with the threaded end 101 along the axial extension line of the second cavity 201, and the raised positioning hole 204 and the recessed positioning hole 205 are connected to the second cavity 201. The second nail body 2 is provided with a microchannel 203 at one end connected to the first cavity 103 and the other end against the inner wall of the second cavity 201 away from the first cavity 103. The maximum diameter of the first cavity 103 is not greater than the maximum diameter of the microchannel 203, and the maximum diameter of the second cavity 201 is greater than the maximum diameter of the first cavity 103.

[0063] When in use, the first nail body 1 is first nailed into the fracture, and the threaded end 101 first contacts the skin at the fracture, that is, after the front end of the threaded end 101 is nailed into the fracture, the second nail body 2 is nailed into the channel formed by the threaded end 101. After the threaded end 101 is nailed in, the bone marrow blood at the fracture will slowly flow into the first cavity 103 and the second cavity 201. The slow growth improves the stability of the anchor, and the actual length of the anchor is extremely small, only 50 microns. At this time, the part of the tissue that grows into the anchor will not cause harm to the human body when it is removed.

[0064] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. An anti-loosening orthopedic anchor, characterized in that: include: A first nail body (1), comprising a threaded end (101) and an assembly end (102), and a first cavity (103) disposed inside the threaded end (101) and the assembly end (102) and penetrating the threaded end (101); And a second nail body (2) connected to the assembly end (102), which has a second cavity (201) communicating with the first cavity (103).

2. The anti-loosening orthopedic anchor according to claim 1, characterized in that: The outer surface of the second nail body (2) is provided with a plurality of first positioning holes (202) evenly distributed along the axial direction, and the first positioning holes (202) are in communication with the second cavity (201).

3. The anti-loosening orthopedic anchor according to claim 1, characterized in that: The second nail body (2) is provided with a micro-channel (203) at one end connected to the first cavity (103) and at the other end abutting against the inner wall of the second cavity (201) in a direction away from the first cavity (103).

4. The anti-loosening orthopedic anchor according to claim 3, characterized in that: The maximum diameter of the first cavity (103) is not greater than the maximum diameter of the microchannel (203), and the maximum diameter of the second cavity (201) is greater than the maximum diameter of the first cavity (103).

5. The anti-loosening orthopedic anchor according to claim 1, characterized in that: The outer surface of the second nail body (2) is a rough surface.

6. The anti-loosening orthopedic anchor according to claim 5, characterized in that: A plurality of raised positioning holes (204) and recessed positioning holes (205) are unevenly distributed on the rough surface, and the raised portion of the raised positioning hole (204) intersects with the threaded end (101) along the axial extension line of the second cavity (201).

7. The anti-loosening orthopedic anchor according to claim 6, characterized in that: The protruding positioning hole (204) and the recessed positioning hole (205) are in communication with the second cavity (201).

8. The anti-loosening orthopedic anchor according to claim 1, characterized in that: The front end of the threaded end (101) gradually increases in size along the axial direction and the rear end has the same maximum diameter as the front end. The assembly end (102) is integrally formed with the second nail body (2).

9. The anti-loosening orthopedic anchor according to claim 1, characterized in that: The maximum diameter of the threaded end (101) is equal to the maximum diameter of the assembly end (102), and the maximum diameter of the threaded end (101) is not less than the maximum diameter of the second nail body (2).

10. The anti-loosening orthopedic anchor according to claim 1, characterized in that: A plurality of first threads (104) are distributed on the threaded end (101), a plurality of second threads (105) are distributed between two adjacent first threads (104), and the diameter of the first threads (104) is greater than the maximum diameter of the second threads (105).

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