Artificial joint

Abstract

The invention provides an artificial joint. The artificial joint comprises a first artificial joint and a second artificial joint, the first artificial joint comprises a first fixed surface and a first contact surface opposite to the first fixed surface; the first fixing surface is used for being connected with a first skeleton, and a first fixing column is arranged on the first fixing surface; the second artificial joint comprises a second fixed surface and a second contact surface opposite to the second fixed surface; the second fixing face is used for being connected with a second skeleton, and a second fixing column is arranged on the second fixing face. The second contact surface is used for being in contact fit with the first contact surface; a first anti-loosening structure is arranged on the surface of the first fixing column, and a second anti-loosening structure is arranged on the surface of the second fixing column. Compared with the prior art, the artificial joint provided by the invention can be more stably fixed on a skeleton and is not easy to loosen.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an artificial joint. Background Art

[0002] Artificial joint replacement refers to a surgical procedure that makes an artificial joint prosthesis based on the shape, structure and function of the human joint, and then implants the artificial joint into the human body through surgery. The main purpose of replacing the function of the diseased joint with an artificial joint is to restore joint function, relieve pain and improve the patient's quality of life.

[0003] There are many types of artificial joints, depending on the location where they need to be implanted. Taking human ankle replacement as an example, currently artificial ankle joints usually include a first artificial joint and a second artificial joint, with a first fixing column provided on the first artificial joint and a second fixing column provided on the second artificial joint. When implanted and used, the first artificial joint is fixedly connected to the fixing hole on the patient's tibia through the first fixing column, and the second artificial joint is fixedly connected to the fixing hole on the patient's talus through the second fixing column.

[0004] Although the surgical process and technology of artificial joint replacement have been standardized clinically, various complications after joint replacement often occur, leading to surgical failure and the need for surgical revision. Artificial joint loosening is the most common postoperative complication. Taking the human ankle joint as an example, during long-term ankle joint movement, the connection between the fixed column and the human skeleton is prone to loosening, causing the patient to need another surgery, which not only affects the patient's normal life, but also increases the patient's financial burden. Summary of the invention

[0005] Aiming at the technical problem that artificial joints in the prior art are prone to loosening, affecting the normal life of patients and also increasing the economic burden of patients, the present invention provides an artificial joint that can be more stably fixed on the human skeleton after implantation, is not prone to loosening, and reduces the probability that patients need to undergo another operation.

[0006] An artificial joint, comprising a first artificial joint and a second artificial joint; The first artificial joint comprises a first fixing surface and a first contact surface opposite to the first fixing surface; The first fixing surface is used to connect to the first bone, and a first fixing column is arranged on the first fixing surface; The second artificial joint comprises a second fixing surface and a second contact surface opposite to the second fixing surface; The second fixing surface is used to connect to the second bone, and a second fixing column is arranged on the second fixing surface; The second contact surface is used for contacting and cooperating with the first contact surface; A first anti-loosening structure is disposed on the surface of the first fixing column, and a second anti-loosening structure is disposed on the surface of the second fixing column.

[0007] Preferably, the first anti-loosening structure is a thread provided on the surface of the first fixing column, and the second anti-loosening structure is a thread provided on the surface of the second fixing column.

[0008] Preferably, the first artificial joint is a tibial artificial joint, and the second artificial joint is a talar artificial joint.

[0009] Preferably, the first artificial joint comprises a joint body and a pad; The pad is located between the joint body and the second artificial joint; The first fixing surface and the first fixing column are located on the joint body; The first contact surface is located on the pad.

[0010] Preferably, the first fixing column comprises a first column body and a first tapered end portion; The first column is connected to the first fixing surface, and a thread is provided on the outer peripheral surface of the first column; The first tapered end portion is disposed at an end of the first column away from the first fixing surface; The second fixing column comprises a second column body and a second tapered end portion; The second column is connected to the second fixing surface, and a thread is provided on the outer peripheral surface of the second column; The second tapered end portion is disposed at an end of the second column away from the second fixing surface.

[0011] Preferably, the first fixing surface is a plane, and the first fixing column is obliquely arranged on the first fixing surface.

[0012] Preferably, three first fixing columns are provided, and the three first fixing columns are distributed in an equilateral triangle on the first fixing surface.

[0013] Preferably, two second fixing columns are provided, and the two second fixing columns are spaced apart from each other.

[0014] Preferably, a plurality of first recessed holes are formed on the first fixing surface; The second fixing surface is provided with a plurality of second recessed holes.

[0015] Preferably, the first contact surface and the second contact surface are respectively provided with a wear-resistant coating.

[0016] Compared with the prior art, the artificial joint provided by the present invention includes a first artificial joint and a second artificial joint; the first artificial joint includes a first fixing surface and a first contact surface opposite to the first fixing surface; the first fixing surface is used to connect to a first bone, and a first fixing column is arranged on the first fixing surface; the second artificial joint includes a second fixing surface and a second contact surface opposite to the second fixing surface; the second fixing surface is used to connect to a second bone, and a second fixing column is arranged on the second fixing surface; the second contact surface is used to contact and cooperate with the first contact surface; the surface of the first fixing column is provided with a first anti-loosening structure, and the surface of the second fixing column is provided with a second anti-loosening structure. In the artificial joint, the first anti-loosening structure is arranged on the surface of the first fixing column, so that when the first fixing column is connected to the first bone, the first anti-loosening structure can make the first fixing column more stably fixed to the first bone, so that the first artificial joint is not easy to loosen on the first bone; and the second anti-loosening structure is arranged on the surface of the second fixing column, so that when the second fixing column is connected to the second bone, the second anti-loosening structure can make the second fixing column more stably fixed to the second bone, so that the second artificial joint is not easy to loosen on the second bone; thereby reducing the probability that the patient needs to undergo another operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an artificial joint provided by an embodiment; Figure 2 A side view of an artificial joint provided in accordance with an embodiment. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] It should be noted that when a component is referred to as being "fixed on", "installed on" or "set on" another component, it can be directly on the other component or indirectly set on the other component; when a component is "connected" to another component, or a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0023] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0024] The present invention provides an artificial joint, which includes a first artificial joint and a second artificial joint; the first artificial joint includes a first fixing surface and a first contact surface opposite to the first fixing surface; the first fixing surface is used to connect to a first bone, and a first fixing column is arranged on the first fixing surface; the second artificial joint includes a second fixing surface and a second contact surface opposite to the second fixing surface; the second fixing surface is used to connect to a second bone, and a second fixing column is arranged on the second fixing surface; the second contact surface is used to contact and cooperate with the first contact surface; the surface of the first fixing column is provided with a first anti-loosening structure, and the surface of the second fixing column is provided with a second anti-loosening structure. In the artificial joint, the first anti-loosening structure is arranged on the surface of the first fixing column, so that when the first fixing column is connected to the first bone, the first fixing column can be fixed to the first bone more stably through the first anti-loosening structure, so that the first artificial joint is not easy to loosen on the first bone; and the second anti-loosening structure is arranged on the surface of the second fixing column, so that when the second fixing column is connected to the second bone, the second fixing column can be fixed to the second bone more stably through the second anti-loosening structure, so that the second artificial joint is not easy to loosen on the second bone; thereby reducing the probability of patients needing to undergo reoperation.

[0025] Please refer to Figure 1 and Figure 2 This embodiment provides an artificial joint 100, which is mainly used to solve the problem that artificial joints in the prior art are prone to loosening after installation.

[0026] The artificial joint 100 includes a first artificial joint 10 and a second artificial joint 20. The first artificial joint 10 includes a first fixing surface 11 and a first contact surface 12 opposite to the first fixing surface 11. The first fixing surface 11 is used to connect to the first bone, and the first fixing surface 11 is provided with a first fixing column 13. That is, in the first artificial joint 10, this side of the first fixing surface 11 is used to connect and fix with the bone. The first fixing column 13 is provided on the first fixing surface 11, which is conducive to the connection and fixation of the first artificial joint 10 with the bone. The second artificial joint 20 includes a second fixing surface 21 and a second contact surface 22 opposite to the second fixing surface 21. The second fixing surface 21 is used to connect to the second bone, and the second fixing column 23 is provided on the second fixing surface 21. That is, in the second artificial joint 20, this side of the second fixing surface 21 is used to connect and fix with the bone. The second fixing column 23 is provided on the second fixing surface 21, which is conducive to the connection and fixation of the second artificial joint 20 with the bone. The first bone and the second bone are two adjacent bones in the human body (e.g., the tibia and the talus at the ankle joint). The second contact surface 22 is used to contact and cooperate with the first contact surface 21. That is, when the first artificial joint 10 and the second artificial joint 20 are implanted in the human body, the second contact surface 22 is opposite to the first contact surface 21, and the second contact surface 22 is in contact with the first contact surface 21. The relative sliding of the first artificial joint 10 and the second artificial joint 20 achieves the purpose of mimicking human joint movement.

[0027] The surface of the first fixing column 13 is provided with a first anti-loosening structure 131, and the surface of the second fixing column 23 is provided with a second anti-loosening structure 231. Through the provision of the first anti-loosening structure 131, after implantation, the connection and fixing effect between the first fixing column 13 and the bone can be increased, so that the first artificial joint 10 can be more stably fixed on the bone, so that the first artificial joint 10 is not easy to loosen. Similarly, through the provision of the second anti-loosening structure 231, after implantation, the connection and fixing effect between the second fixing column 23 and the bone can be increased, so that the second artificial joint 20 can be more stably fixed on the bone, so that the second artificial joint 20 is not easy to loosen. Among them, the first anti-loosening structure 131 can be a convex structure provided on the surface of the first fixing column 13, so that the first fixing column 13 is more stably connected and not easy to loosen. Similarly, the second anti-loosening structure 231 can be a convex structure provided on the surface of the second fixing column 23, so that the second fixing column 23 is more stably connected and not easy to loosen.

[0028] It is understandable that in the prior art, when an artificial joint is implanted, the artificial joint is fixedly connected to the fixing hole on the bone through a columnar fixing column. However, the fixing column in the prior art is a simple columnar structure, which makes the fixing effect between the artificial joint and the fixing hole of the bone poor, resulting in the artificial joint being easily loosened or falling off during long-term joint movement after artificial joint replacement. Once the artificial joint becomes loose or falls off, it will not only affect the patient's normal life, but also cause the patient to need another operation, which also increases the patient's economic burden.

[0029] In the artificial joint 100 provided in this embodiment, the first anti-loosening structure 131 is provided on the first fixing column 13, so that after the first artificial joint 10 is implanted, the first artificial joint 10 can be fixed on the bone more stably, and the first artificial joint 10 is not easy to loosen or fall off during the subsequent long-term joint movement of the patient. Similarly, the second anti-loosening structure 231 is provided on the second fixing column 23, so that after the second artificial joint 20 is implanted, the second artificial joint 20 can be fixed on the bone more stably, and the second artificial joint 20 is not easy to loosen or fall off during the subsequent long-term joint movement of the patient. In this way, the normal life of the patient after surgery can be better guaranteed, the probability of the patient needing another operation can be reduced, and the economic burden of the patient can be alleviated.

[0030] Preferably, in one embodiment, the first anti-loosening structure 131 is a thread provided on the surface of the first fixing column 13, and the second anti-loosening structure 231 is a thread provided on the surface of the second fixing column 23. That is to say, in this embodiment, the first fixing column 13 and the second fixing column 23 are both screw-shaped structures, thereby improving the fixing effect between the first fixing column 13 and the bone, and between the second fixing column 23 and the bone, which can effectively reduce the risk of the first artificial joint 10 loosening or falling off after being implanted in the human body, and can also effectively reduce the risk of the second artificial joint 20 loosening or falling off after being implanted in the human body.

[0031] Preferably, in one embodiment, the first artificial joint 10 is a tibial artificial joint, and the second artificial joint 20 is a talar artificial joint. That is, in this embodiment, the artificial joint 100 is specifically applied to the ankle joint of a human body. The first bone is specifically the tibia, and the first artificial joint 10 is used to be implanted and fixed on the tibia. The second bone is specifically the talus, and the second artificial joint 20 is used to be implanted and fixed on the talus.

[0032] Preferably, in one embodiment, the first artificial joint 10 includes a joint body 101 and a pad 102, and the pad 102 is located between the joint body 101 and the second artificial joint 20. The first fixing surface 11 and the first fixing column 13 are located on the joint body 101, and the first contact surface 12 is located on the pad 102. That is to say, in this embodiment, the first artificial joint 10 is specifically fixedly connected to the bone through the joint body 101, and the pad 102 is arranged between the joint body 101 and the second artificial joint 20, so as to increase the range of motion and reduce the restriction. Specifically, in one embodiment, the joint body 101 and the second artificial joint 20 are made of metal, and the pad 102 is made of plastic. Of course, in other embodiments, the joint body 101, the second artificial joint 20, and the pad 102 can also be made of other required materials according to actual needs. In addition, in other embodiments, the pad 102 may not be provided, but the first artificial joint 10 and the second artificial joint 20 made of two metal materials may be directly in contact.

[0033] Preferably, in one embodiment, the first fixing column 13 includes a first column 132 and a first tapered end 133, the first column 132 is connected to the first fixing surface 11, and the outer circumferential surface of the first column 132 is provided with a thread, and the first tapered end 133 is provided at an end of the first column 132 away from the first fixing surface 11. That is, in this embodiment, the first anti-loosening structure 131 is a thread provided on the surface of the first column 132, and the end of the first fixing column 13 is a tapered structure (i.e., the first tapered end 133), thereby facilitating the implantation of the first fixing column 13 during surgery. The second fixing column 23 includes a second column 232 and a second tapered end 233, the second column 232 is connected to the second fixing surface 21, and the outer circumferential surface of the second column 232 is provided with a thread, and the second tapered end 233 is provided at an end of the second column 232 away from the second fixing surface 21. That is to say, in this embodiment, the second anti-loosening structure 231 is a thread arranged on the surface of the second column 232, and the end of the second fixing column 23 is also a conical structure (i.e., the second conical end 233), which is convenient for implanting the second fixing column 23 during surgery.

[0034] Preferably, in one embodiment, the first fixing surface 11 is a plane, and the first fixing column 13 is obliquely arranged on the first fixing surface 11, so as to facilitate the fixation between the first artificial joint 10 and the bone.

[0035] Preferably, in one embodiment, three first fixing columns 13 are provided, and the three first fixing columns 13 are distributed in an equilateral triangle on the first fixing surface 11. By providing three first fixing columns 13, after the first artificial joint 10 is implanted, the pressure between the first artificial joint 10 and the bone can be dispersed to avoid stress concentration.

[0036] Preferably, in one embodiment, two second fixing posts 23 are provided, and the two second fixing posts 23 are spaced apart from each other. By providing two second fixing posts 23, after the second artificial joint 20 is implanted, the pressure between the second artificial joint 20 and the bone can be dispersed to avoid stress concentration.

[0037] Preferably, in one embodiment, a plurality of first recessed holes 111 are provided on the first fixing surface 11, and a plurality of second recessed holes are provided on the second fixing surface 21. That is to say, the first fixing surface 11 is a multi-microporous structure, so that after the first artificial joint 10 is implanted, part of the tissue can grow into the first recessed holes 111, thereby increasing the connection stability between the first artificial joint 10 and the bone. Similarly, the second fixing surface 21 is also a multi-microporous structure, so that after the second artificial joint 20 is implanted, part of the tissue can grow into the second recessed holes, thereby increasing the connection stability between the second artificial joint 20 and the bone.

[0038] Preferably, in one embodiment, a wear-resistant coating is provided on the first contact surface 12 and the second contact surface 22, respectively, so as to improve the wear resistance of the first artificial joint 10 and the second artificial joint 20. Specifically, in one embodiment, a TiN wear-resistant coating or a metal ceramic wear-resistant coating is sprayed on the first contact surface 12 and the second contact surface 22.

[0039] Specifically, in one embodiment, the first artificial joint 10 and the second artificial joint 20 are manufactured by using 3D printing technology.

[0040] Preferably, in one embodiment, a concave-convex arc surface matching structure is formed between the first contact surface 12 and the second contact surface 22, that is, when a certain position of the first contact surface 12 is an inwardly concave arc surface structure, the corresponding position of the second contact surface 22 is an outwardly convex arc surface structure. The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. An artificial joint, characterized in that: including a first artificial joint and a second artificial joint; The first artificial joint comprises a first fixing surface and a first contact surface opposite to the first fixing surface; The first fixing surface is used to connect to the first bone, and a first fixing column is arranged on the first fixing surface; The second artificial joint comprises a second fixing surface and a second contact surface opposite to the second fixing surface; The second fixing surface is used to connect to the second bone, and a second fixing column is arranged on the second fixing surface; The second contact surface is used for contacting and cooperating with the first contact surface; A first anti-loosening structure is disposed on the surface of the first fixing column, and a second anti-loosening structure is disposed on the surface of the second fixing column.

2. The artificial joint according to claim 1, characterized in that: The first anti-loosening structure is a thread provided on the surface of the first fixing column, and the second anti-loosening structure is a thread provided on the surface of the second fixing column.

3. The artificial joint according to claim 1, characterized in that: The first artificial joint is a tibial artificial joint, and the second artificial joint is a talar artificial joint.

4. The artificial joint according to claim 1, characterized in that: The first artificial joint includes a joint body and a pad; The pad is located between the joint body and the second artificial joint; The first fixing surface and the first fixing column are located on the joint body; The first contact surface is located on the pad.

5. The artificial joint according to claim 1, characterized in that: The first fixing column comprises a first column body and a first tapered end portion; The first column is connected to the first fixing surface, and a thread is provided on the outer peripheral surface of the first column; The first tapered end portion is disposed at an end of the first column away from the first fixing surface; The second fixing column comprises a second column body and a second tapered end portion; The second column is connected to the second fixing surface, and a thread is provided on the outer peripheral surface of the second column; The second tapered end portion is disposed at an end of the second column away from the second fixing surface.

6. The artificial joint according to claim 1, characterized in that: The first fixing surface is a plane, and the first fixing column is obliquely arranged on the first fixing surface.

7. The artificial joint according to claim 6, characterized in that: There are three first fixing columns, and the three first fixing columns are distributed in an equilateral triangle on the first fixing surface.

8. The artificial joint according to claim 1, characterized in that: Two second fixing columns are provided, and the two second fixing columns are spaced apart from each other.

9. The artificial joint according to claim 1, characterized in that: The first fixing surface is provided with a plurality of first recessed holes; The second fixing surface is provided with a plurality of second recessed holes.

10. The artificial joint according to claim 1, characterized in that: The first contact surface and the second contact surface are respectively provided with a wear-resistant coating.

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