KR102606691B1 - Artificial Joints with Porous Layers and Molding Method thereof - Google Patents

Abstract

The present invention relates to an artificial joint with a porous layer and a method of forming the same, and more specifically to an osteosynthesis surface, which is the part of an orthopedic prosthesis that directly contacts the patient's bone; a porous layer with voids formed therein; An artificial artificial layer with a porous layer, characterized in that it includes a connecting layer that is inserted between the osteointegration surface and the porous layer and includes at least one component identical to the component of the osteointegration surface to induce bonding of dissimilar metals. It's about joints.

Description

Artificial joints with porous layers and molding method thereof {Artificial Joints with Porous Layers and Molding Method thereof}

The present invention relates to an artificial joint with a porous layer and a method of forming the same, and more specifically to an osteosynthesis surface, which is the part of an orthopedic prosthesis that directly contacts the patient's bone; a porous layer with voids formed therein; An artificial artificial layer with a porous layer, characterized in that it includes a connecting layer that is inserted between the osteointegration surface and the porous layer and includes at least one component identical to the component of the osteointegration surface to induce bonding of dissimilar metals. It's about joints.

The purpose of the present invention is to induce bonding between the osteointegration surface of an artificial joint made of dissimilar metal and the porous layer with voids formed therein through a connection layer containing at least one component identical to that of the osteointegration surface, This is to facilitate bonding between dissimilar metals.

Another object of the present invention is to provide an artificial joint in which a porous layer is formed by placing a connection layer between an osteosynthesis surface made of a different metal and a porous layer and applying heat and pressure.

Another object of the present invention is to prevent the artificial joint from falling off from the patient's bone by providing an artificial joint with a porous layer, thereby promoting spontaneous bone growth between the implanted artificial joint and the patient's bone.

In order to achieve the above-described object, the present invention is implemented by an embodiment having the following configuration.

According to one embodiment of the present invention, the present invention includes an osteosynthesis surface, which is a part of an orthopedic prosthesis that is in direct contact with the patient's bone; a porous layer with voids formed therein; A connecting layer that is bonded between the bone bonding surface and the porous layer and includes at least one component identical to that of the bone bonding surface to induce bonding of dissimilar metals; It is characterized by including.

According to another embodiment of the present invention, the present invention includes the step of providing a base material for providing an orthopedic prosthesis; A porous layer forming step of creating a porous layer with a structure that promotes bone growth by forming pores inside; A connection layer forming step of forming a connection layer located between the bone bonding surface and the porous layer to induce bonding of dissimilar metals; A hipping step of placing the connecting layer between the bone bonding surface and the porous layer and applying heat and pressure to combine the bone bonding surface made of a different metal and the porous layer; It is characterized by including.

The present invention can achieve the following effects by combining the above-mentioned embodiment with the configuration, combination, and use relationship described below.

The present invention induces bonding between the osteointegration surface of an artificial joint made of a different metal and a porous layer with pores formed therein through a connecting layer containing at least one component identical to that of the osteointegration surface, It has the effect of facilitating the combination between the two.

The present invention has the effect of providing an artificial joint with a porous layer formed by arranging a connection layer between an osteosynthesis surface made of a different metal and a porous layer and applying heat and pressure.

The present invention provides an artificial joint with a porous layer, which has the effect of preventing the artificial joint from falling off from the patient's bone by promoting spontaneous bone growth between the implanted artificial joint and the patient's bone.

1 is a drawing of the base material of the present invention.
Figure 2 is a diagram of an artificial joint in which a porous layer is formed.
Figure 3 is a view of a rib coupled to a connecting layer.
Figure 4 is a diagram of a method for forming an artificial joint with a porous layer, which is an embodiment of the present invention.
Figure 5 is a diagram relating to the base material provision step of Figure 4.
Figure 6 is a diagram relating to the porous layer forming step of Figure 4.
Figure 7 is a diagram of a method for forming an artificial joint with a porous layer, which is another embodiment of the present invention.
Figure 8 is a reference diagram.

Hereinafter, preferred embodiments of an artificial joint with a porous layer and a method for forming the same according to the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if a detailed description of a known function or configuration is judged to unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Unless otherwise specified, all terms in this specification have the same general meaning as understood by a person skilled in the art to which the present invention pertains, and if there is a conflict with the meaning of the terms used in this specification, this specification Follow the definitions used in the specification.

According to one embodiment of the present invention, the artificial joint 1 having a porous layer according to the present invention includes a base material 10 having an osteosynthesis surface 101, a porous layer 30, and a connection layer 50.

The base material 10 corresponds to an orthopedic prosthesis used in shoulder joint, knee joint, and ankle joint replacement surgery, and the osteointegration surface 101 refers to the part of the base material 10 that directly contacts the patient's bone. . The orthopedic prosthesis may be made of various materials, but is preferably made of cobalt-chromium-molybdenum alloy (CoCrMo). The orthopedic prosthesis is made of cobalt-chromium-molybdenum alloy (CoCrMo) and is cast into the desired shape, then goes through a heat treatment process, machining/grinding, and blasting. It is formed through processes such as blasting and polishing. For example, when the orthopedic prosthesis is a tibial element used in knee joint replacement surgery, the tibial element is implanted at the proximal end of the tibia, and in this case, as shown in Figure 1, the lower side of the base plate of the tibial element is positioned on the patient's side. As it comes into contact with the bone, this part becomes the osteosynthesis surface 101.

The porous layer 30 has a three-dimensional structure forming voids 31 therein, and there are no particular restrictions regarding the shape of the voids 31. The material constituting the porous layer 30 is not limited to any specific concept, but is preferably titanium (Ti).

The porous layer 30 may be formed through a 3D printing method, etc. using titanium (Ti) powder or titanium (Ti)-based alloy powder. Regarding the 3D printing method, it is not limited to any specific method, but preferably, the DED (Directed Energy Deposition) method, which melts and attaches the raw material with a high energy source (laser, electron beam, etc.), or the high energy deposition method on the base material in powder form. The PBF (Powder Bed Fusion) method, which scans and irradiates beams (such as lasers or electron beams) and selectively combines them, can be used. The porous layer 30 is completed through a post-processing process such as cleaning after 3D printing.

The connecting layer 50 is located between the bone bonding surface 101 and the porous layer 30 and is configured to induce bonding of dissimilar metals, and is preferably the same as the components of the bone bonding surface 101. It is configured to include at least one ingredient.

According to the above-mentioned information, the bone bonding surface 101 may preferably be composed of cobalt-chromium-molybdenum alloy (CoCrMo), and the porous layer 30 may preferably be composed of titanium (Ti). Bar, bonding becomes difficult between the bone bonding surface 101 and the porous layer 30 made of different metals. Therefore, by configuring the connection layer 50 to have at least one or more of the same components among the components of the bone integration surface 101, the connection layer 50 is placed on the lower side of the bone integration surface 101, and the connection layer 50 ) When the porous layer 30 is placed underneath and the hipping step described later is performed, the connecting layer 50 melts, thereby inducing bonding between the bone bonding surface 101 and the porous layer 30.

The connecting layer 50 is not limited to a specific material, but is preferably a molybdenum component, which is a component of the base material 10 having a bone bonding surface 101 of cobalt-chromium-molybdenum alloy (CoCrMo). It can be Lamina Film or Metal Foil. The Lamina Film may preferably be composed of mono (0.01 to 0.3 μm) and poly (0.3 to 10 μm). In addition, the connecting layer 50 can be temporarily fixed before bonding the bone bonding surface 101 and the porous layer 30 through a hipping step to be described later, using an adhesive or the like to bond the bone bonding surface 101 and the bone bonding surface 101. It may be configured to enable temporary bonding between the porous layers 30.

Hereinafter, the method of forming the artificial joint 1 in which the above-described porous layer is formed will be described.

The method of forming an artificial joint (1) with a porous layer, which is an embodiment of the present invention, includes a base material providing step (S1), a porous layer forming step (S2), a connecting layer forming step (S3), a hipping step (S4), and a blasting step. (S5), including a washing and sterilizing step (S6).

The base material providing step (S1) is a step of providing an orthopedic prosthesis in which a porous layer is not formed. According to the above, the orthopedic prosthesis may preferably be formed of cobalt-chromium-molybdenum alloy (CoCrMo). there is. This base material provision step (S1) includes a casting step (S11), a heat treatment step (S13), a machining step (S15), a blasting step (S17), and a polishing step (S19).

The casting step (S11) refers to a process of manufacturing an orthopedic prosthesis of a desired shape, preferably using cobalt-chromium-molybdenum alloy (CoCrMo), and the heat treatment step (S13) refers to a process of manufacturing an orthopedic prosthesis of a desired shape. This refers to the process of changing the mechanical properties of a cast orthopedic prosthesis through heating, cooling, and hardening. The machining step (S15) is a process of polishing the orthopedic prosthesis that has undergone the heat treatment step using a machine, etc., and the blasting step (S17) is a process of removing impurities and metal oxides attached to the surface of the orthopedic prosthesis that has been machined. This refers to the process of removing the back. The polishing step (S19) refers to a process of smoothing the rough surface of an orthopedic prosthesis that has undergone a blasting process using an abrasive.

The porous layer forming step (S2) is a step of creating a porous layer 30, which has a structure that promotes spontaneous bone growth by forming pores 31 therein. Although it is not limited to any specific concept, preferably, the constituent material of the porous layer 30 may be titanium (Ti). This porous layer forming step (S2) includes a powder providing step (S21), a 3D printing step (S23), and a post-processing step (S25).

The powder providing step (S21) is a step of supplying powder to be used in the 3D printing step (S23) to be described later. The type of powder is not limited to a specific concept, but is preferably titanium (Ti) powder or titanium ( An alloy powder based on Ti) may be used.

The 3D printing step (S23) is performed using a DED (Directed Energy Deposition) method, which melts and attaches the raw material using a high-energy source (such as a laser or electron beam) using the provided powder, or a high-energy beam (laser) method on the base material in powder form. This refers to the process of forming the three-dimensional structure of the porous layer 30 using the PBF (Powder Bed Fusion) method, which selectively combines by scanning and irradiating (or electron beam, etc.).

The post-processing step (S25) is all post-processing processes that enable it to be used in combination with an orthopedic prosthesis, such as cleaning the porous layer 30 created through the 3D printing step (S23). refers to

The connection layer forming step (S3) is a step of forming a connection layer 50 that is located between the bone bonding surface 101 and the porous layer 30 and induces bonding of dissimilar metals. It is not limited to a specific material, but is preferably a Lamina Film or Metal Foil of molybdenum, which is a component of the base material 10 having a bone bonding surface 101 of cobalt-chromium-molybdenum alloy (CoCrMo). This can be. The Lamina Film is preferably composed of mono (0.01 to 0.3 μm) and poly (0.3 to 10 μm).

The hipping step (S4) places the connecting layer 50 between the osteointegrating surface 101 and the porous layer 30 and applies heat and pressure so that the connecting layer 50 is formed on the osteointegrating surface 101 and/or It refers to a process of fusing to the porous layer 30 and combining the porous layer 30 with the bone bonding surface 101 made of dissimilar metals. Preferably, the temperature in the hipping step (S4) may be 900 to 1260°C and the pressure may be 100 to 500 MPa.

The blasting step (S5) refers to a process of removing impurities, metal oxides, etc. attached to the surface of the artificial joint 1 on which the porous layer is formed after the hipping step (S4). Ice-blasting or deburring may be used in the blasting step (S7).

The washing and sterilizing step (S6) refers to a process of washing and sterilizing the surface of the artificial joint 1 on which the porous layer 30 is formed on the osteosynthesis surface 101 through the connecting layer 50. Regarding the cleaning and sterilization method, it is not limited to a specific concept, and various known or to be known concepts may be included.

The method of forming an artificial joint (1) with a porous layer, which is another embodiment of the present invention, includes a base material providing step (S10), a porous layer forming step (S20), a connecting layer forming step (S30), a hipping step (S40), and a rib forming step. It includes a step (S50), a temporary bonding step (S60), a blasting step (S70), and a washing sterilization step (S80). In order to avoid duplication with the above-described content, the additional rib forming step (S50) and temporary bonding step (S60) will be described below.

The rib forming step (S50) is bonded to one side of the porous layer 30 and supports the porous layer 30 before complete bonding of the bone bonding surface 101 and the porous layer 30 is achieved, thereby forming the porous layer ( This is the step of forming the rib 70 to prevent distortion of 30).

The rib 70 is a configuration that is coupled to one side of the porous layer 30 and supports the porous layer 30 before complete bonding of the bone bonding surface 101 and the porous layer 30 is achieved. This is a configuration that prevents distortion of (30). Various methods may be used in relation to the method of bonding the rib 70 and the porous layer 30, but preferably, they can be bonded by pressing or mechanical hooking such as tongs.

In relation to the shape of the rib 70, the rib 70 supports the porous layer 30 before it is completely combined with the bone bonding surface 101, and one side of the porous layer 30 and It is desirable to have a planar form with a complementary shape. The rib 70 does not need to be entirely solid and may have a plurality of through holes 71 on the inside. Referring to FIG. 2, FIG. 2 is an embodiment of the rib 70, and according to this embodiment, the inside of the rib 70 may be configured in a grid shape. The connection layer 50 is absorbed by the osteosynthetic surface 101 and the porous layer 30 in the hipping step to be described later, but is not absorbed by the rib 70. When the hipping step to be described later is completed, the rib 70 Can be removed from the porous layer 30. That is, the ribs 70 support the porous layer 30 until the hipping step is completed, thereby enabling the porous layer 30 to be properly coupled to the bone joint surface 101 through the connecting layer 50.

The temporary bonding step (S60) is to bond the porous layer 30 to the orthopedic prosthesis provided through the base material providing step (S10), the porous layer forming step (S20), and the connecting layer forming step (S30). ), refers to the process of temporarily bonding the porous layer 30, connection layer 50, and rib 70 provided through the rib forming step (S50) with the bone bonding surface 101.

A connecting layer 50 is placed between the bone joint surface 101 and the porous layer 30, and the porous layer 50 is positioned to be supported by the ribs 70 and temporarily fixed so that they do not deviate from their original positions. do. For this purpose, adhesive or tongs, etc. may be used in the temporary bonding step (S60).

The above detailed description is illustrative of the present invention. Additionally, the foregoing is intended to illustrate preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications can be made within the scope of the inventive concept disclosed in this specification, a scope equivalent to the written disclosure, and/or within the scope of technology or knowledge in the art. The written examples illustrate the best state for implementing the technical idea of the present invention, and various changes required for specific application fields and uses of the present invention are also possible. Accordingly, the detailed description of the invention above is not intended to limit the invention to the disclosed embodiments. Additionally, the appended claims should be construed to include other embodiments as well.

10: base material 30: porous layer
50: connecting layer 70: rib
S1: Base material provision step S2: Porous layer formation step
S3: Connection layer formation step S4: Heaping step
S5: Blasting step S6: Washing sterilization step

Claims (2)

In an orthopedic prosthesis, the osteosynthesis surface is the part that directly contacts the patient's bone; a porous layer formed of a dissimilar metal material with the bone joint surface and having voids therein; A connecting layer that is bonded between the bone bonding surface and the porous layer and includes at least one component identical to that of the bone bonding surface to induce bonding of dissimilar metals; and wherein the connecting layer is configured to fuse the osteointegration surface and the porous layer, thereby coupling the porous layer to the osteointegration surface. A base material providing step for providing an orthopedic prosthesis; A porous layer forming step of creating a porous layer with a structure that promotes bone growth by forming pores inside; In an orthopedic prosthesis, a connection layer forming step of forming a connection layer that induces bonding of dissimilar metals and is located between the bone bonding surface that directly contacts the patient's bone and the porous layer formed of the bone bonding surface and a dissimilar metal material; ; The connection layer includes a hipping step of disposing the connection layer between the osteointegration surface and the porous layer and fusing it with the osteointegration surface and the porous layer by applying heat and pressure; A method of forming an artificial joint with a porous layer, comprising forming the artificial joint of claim 1.

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