Antibiotic spacer for artificial hip joint using carbon fiber

Abstract

The present invention relates to an antibiotic spacer for an artificial hip joint using a carbon fiber, the antibiotic spacer being entirely made of a carbon fiber and being temporarily used in a hip joint region until an artificial joint revision surgery is performed. According to the present invention, an antibiotic spacer for an artificial hip joint comprises: an inner support part formed in a curved shape which is bent in one direction; an outer support part disposed outside the inner support part and formed in a curved shape which is bent in the same direction as that of the inner support part; a middle support part which connects the inner support part and the outer support part, which are spaced apart from each other, to be inclined toward each other; a core part formed to connect one end of the inner support part and one end of the outer support part to each other; and an extension support which connects the other end of the inner support part and the other end of the outer support part to each other and extends to be long downward, wherein the antibiotic spacer for an artificial hip joint includes multiple carbon fiber sheets laminated on and coupled to each other; and the inner support part and the outer support part have more carbon fiber sheets laminated thereon and coupled thereto than, and thus have a higher density of carbon fiber sheets per unit area than the middle support part and the extension support.

Description

Antibiotic spacer for artificial hip joint using carbon fiber

[0001] The present invention relates to an antibiotic spacer for an artificial hip joint using carbon fiber, and more particularly, to an antibiotic spacer for an artificial hip joint using carbon fiber, which is made entirely of carbon fiber and is temporarily used in a hip joint area until artificial joint replacement surgery is performed.

[0002] The current treatment for infection in artificial hip joints involves removing the existing artificial joint, temporarily placing a spacer containing antibiotics, and then performing a revision artificial joint replacement surgery 1 to 3 months later.

[0003] The above spacers can be ① made and used directly in the operating room, or ② used as finished products tailored to the size.

[0004] In case ②, it is currently not being imported domestically.

[0005] In case ①, PMMA cement containing antibiotics is wrapped around a metal stem shape and used.

[0006] As mentioned above, the artificial hip joint antibiotic spacer temporarily installed in the hip joint area must be used while withstanding strength until the infection in the joint area is controlled, but the problem of it easily breaking due to large loads applied to the hip joint area frequently occurs.

[0007] If a lot of metal is used to increase strength, the weight increases, causing inconvenience to the patient's movements.

[0008] This invention is being carried out as a result of the following national research and development project.

[0009] * Assignment ID: 090-091-3000-3039-301

[0010] * Ministry Name: Ministry of Health and Welfare

[0011] * Research Project Name: Biocompatible New Material Medical Device Industry Promotion Project

[0012] * Research Project Name: Carbon Material Biocompatibility Medical Device Support Center Construction Project

[0013] * Host institution: Chonbuk National University Hospital

[0014] * Research period: September 1, 2020 - December 31, 2023

[0015] The present invention is intended to solve the aforementioned problems, and its purpose is to provide an antibiotic spacer for an artificial hip joint using carbon fiber that can maintain high strength while reducing the overall weight.

[0016] In order to achieve the above object, the present invention provides an antibiotic spacer for an artificial hip joint using carbon fiber, comprising: an inner support portion formed in a curved shape bent in one direction; an outer support portion disposed on the outside of the inner support portion and formed in a curved shape bent in the same direction as the inner support portion; an intermediate support portion obliquely connecting the inner and outer support portions, which are spaced apart from each other; a core portion formed by connecting one end of the inner support portion and one end of the outer support portion; and an extension support portion extending downwardly while connecting the other end of the inner support portion and the other end of the outer support portion; wherein the antibiotic spacer for an artificial hip joint is formed by laminating and bonding a plurality of carbon fiber sheets, and more carbon fiber sheets are laminated and bonded to the inner and outer support portions than to the intermediate support portion and the extension support portion, so that the density of the carbon fiber sheets per unit area is higher.

[0017] Inside the inner support portion, a first curved carbon fiber body having a shape corresponding to the inner support portion is further laminated to reinforce the strength against the compressive force applied to the inner support portion, and inside the outer support portion, a second curved carbon fiber body having a shape corresponding to the outer support portion is further laminated to reinforce the strength against the tensile force applied to the outer support portion.

[0018] The second curved carbon fiber body disposed inside the outer support member is formed to extend to a position where the outer support member is bent in a horizontal direction.

[0019] According to the antibiotic spacer for artificial hip joint using carbon fiber of the present invention as described above, the following effects are provided.

[0020] The antibiotic spacer for artificial hip joint of the present invention is made entirely of multiple carbon fiber sheets laminated together, thereby reducing the overall weight.

[0021] In addition, by additionally placing a first curved carbon fiber body on the inner support portion, which is a portion that receives a lot of compressive force, and additionally placing a second curved carbon fiber body on the outer support portion, which is a portion that receives a lot of tensile force, the weight of the antibiotic spacer for artificial hip joints can be reduced while maintaining a high strength against the load applied to the antibiotic spacer for artificial hip joints.

[0022] Figure 1 is a schematic diagram illustrating an antibiotic spacer for an artificial hip joint using carbon fiber of the present invention.

[0023] The antibiotic spacer for an artificial hip joint using carbon fiber of the present invention comprises, as shown in Fig. 1, an inner support part (10), an outer support part (20), an intermediate support part (30), a core part (40), and an extension support part (50).

[0024] The above inner support portion (10) is formed in a curved shape that is bent in one direction.

[0025] The above outer support part (20) is placed on the outside of the above inner support part (10) and is formed into a curved shape by bending in the same direction as the above inner support part (10).

[0026] The above intermediate support member (30) connects the inner support member (10) and the outer support member (20), which are spaced apart from each other, at an angle.

[0027] The above core portion (40) is formed by connecting one end of the inner support portion (10) and one end of the outer support portion (20) to each other.

[0028] An artificial acetabulum that comes into contact with the femoral head is connected to the above core portion (40).

[0029] The above extension support (50) extends downwardly while connecting the other end of the inner support (10) and the other end of the outer support (20).

[0030] In Fig. 1, the lower part of the extension support (50) is partially omitted.

[0031] The antibiotic spacer for artificial hip joint of the present invention, which has the shape as above, is formed entirely by laminating and bonding a plurality of carbon fiber sheets (5).

[0032] That is, after stacking a plurality of carbon fiber sheets (5), they are cut to fit the shape of the antibiotic spacer for the artificial hip joint.

[0033] At this time, the plurality of carbon fiber sheets (5) that are laminated are formed by laminating the plurality of carbon fiber sheets (5) arranged in different directions in different directions.

[0034] In the inner support portion (10) and outer support portion (20), more carbon fiber sheets (5) are laminated and bonded than in the intermediate support portion (30) and extension support portion (50), so that the density of carbon fiber sheets (5) per unit area is higher.

[0035] Through this, the strength and durability of the inner support part (10) and outer support part (20) on which a large load is applied can be improved.

[0036] To explain more specifically, inside the inner support member (10), a first curved carbon fiber body (11) having a shape corresponding to the inner support member (10) is further laminated in multiple layers.

[0037] That is, the first curved carbon fiber body (11) is formed in bundles and is arranged to be bent toward the core portion (40) inside the inner support portion (10).

[0038] By further stacking the first curved carbon fiber body (11) as described above to form the inner support portion (10), the strength and rigidity against the compressive force applied to the inner support portion (10) can be reinforced.

[0039] In addition, inside the outer support member (20), a second curved carbon fiber body (21) having a shape corresponding to the outer support member (20) is further laminated and arranged in multiple layers.

[0040] That is, the second curved carbon fiber body (21) is formed in bundles and is arranged to be bent toward the core portion (40) inside the outer support portion (20).

[0041] By further stacking the second curved carbon fiber body (21) as described above to form the outer support portion (20), the strength against the tensile force applied to the outer support portion (20) can be reinforced.

[0042] At this time, it is preferable that the second curved carbon fiber body (21) disposed inside the outer support member (20) be formed to extend at least to a position where the outer support member (20) is bent in the horizontal direction.

[0043] By inserting and arranging the second curved carbon fiber body (21) into the portion of the outer support portion (20) that receives a lot of tensile force through the structure as above, the strength and durability of the outer support portion (20) can be increased.

[0044] The first curved carbon fiber body (11) and the second curved carbon fiber body (21) are formed with a higher density of carbon fiber per unit area than other carbon fiber sheets (5).

[0045] And, the remaining area except for the core part (40) is wrapped with PMMA cement containing antibiotics as in the past.

[0046] Looking at the method for manufacturing the antibiotic spacer for artificial hip joint of the present invention, first, a plurality of carbon fiber sheets (5) are stacked in the vertical direction so that the fiber arrangement directions of the carbon fiber sheets (5) are arranged in different directions.

[0047] At this time, the first curved carbon fiber body (11) and the second curved carbon fiber body (21) made up of bundles are arranged several times between appropriate layers between a plurality of carbon fiber sheets (5).

[0048] Since the first curved carbon fiber body (11) and the second curved carbon fiber body (21) must be arranged inside the inner support portion (10) and the outer support portion (20) as described above, the arrangement of the first curved carbon fiber body (11) and the second curved carbon fiber body (21) must be arranged and laminated so as to match the positions of the inner support portion (10) and the outer support portion (20) that have been designed in advance.

[0049] After that, the laminated carbon fiber sheet (5) is cut to fit the pre-designed shape of the artificial hip joint antibiotic spacer.

[0050] The cut carbon fiber sheet (5) forms the shape of an antibiotic spacer for an artificial hip joint of the present invention, and at this time, the first curved carbon fiber body (11) is arranged inside the inner support part (10), and the second curved carbon fiber body (21) is arranged inside the outer support part (20).

[0051] As above, the overall weight can be reduced by manufacturing the antibiotic spacer for artificial hip joint using carbon fiber sheet (5).

[0052] In addition, by additionally arranging a first curved carbon fiber body (11) in the inner support portion (10), which is a portion that receives a lot of compressive force, and additionally arranging a second curved carbon fiber body (21) in the outer support portion (20), which is a portion that receives a lot of tensile force, the weight of the antibiotic spacer for artificial hip joints can be reduced while maintaining a high strength against the load acting on the antibiotic spacer for artificial hip joints.

[0053]

[0054] The antibiotic spacer for an artificial hip joint using carbon fiber according to the present invention is not limited to the above-described embodiment, and can be implemented by various modifications within the scope permitted by the technical concept of the present invention.

[0055] The present invention has industrial applicability because it can be applied to an antibiotic spacer for an artificial hip joint using carbon fiber.

Claims

1. In antibiotic spacers for artificial hip joints, An inner support formed in a curved shape that is bent in one direction; An outer support portion arranged on the outer side of the inner support portion and formed into a curved shape by bending in the same direction as the inner support portion; An intermediate support section that connects the inner and outer support sections, which are spaced apart from each other, at an angle; A core portion formed by connecting one end of the inner support portion and one end of the outer support portion to each other; It is composed of an extension support member that extends downwardly while connecting the other end of the inner support member and the other end of the outer support member to each other; The above-mentioned antibiotic spacer for artificial hip joint is formed by laminating and bonding multiple carbon fiber sheets, An antibiotic spacer for an artificial hip joint using carbon fiber, characterized in that more carbon fiber sheets are laminated and bonded to the inner and outer support sections than to the intermediate and extension support sections, thereby providing a higher density of carbon fiber sheets per unit area.

2. In claim 1, Inside the inner support portion, a first curved carbon fiber body having a shape corresponding to the inner support portion is further laminated to reinforce the strength against the compressive force applied to the inner support portion. An antibiotic spacer for an artificial hip joint using carbon fiber, characterized in that a second curved carbon fiber body having a shape corresponding to the outer support part is further laminated inside the outer support part to reinforce strength against a tensile force applied to the outer support part.

3. In claim 2, An antibiotic spacer for an artificial hip joint using carbon fiber, characterized in that the second curved carbon fiber body arranged inside the outer support member is extended to a position where the outer support member bends in a horizontal direction.

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