Carbon material filling connection member for bone defect repair

Abstract

The present invention relates to a carbon material filling connection member for bone defect repair and, more specifically, to a carbon material filling connection member for bone defect repair, which connects bones that have been cut to each other when bones are removed due to bone tumors or trauma. The carbon material filling connection member for bone defect repair according to the present invention is a filling connection member for bone defect repair which connects bones spaced apart from each other due to a bone defect, characterized by comprising: a hollow column-shaped spacer which is disposed between an upper bone and a lower bone which are cut and spaced apart from each other and has a through-hole formed therein; two or more supports which are arranged in the lateral direction of the upper bone, the spacer, and the lower bone; and a fastening member for coupling the supports to the upper bone, the spacer, and the lower bone, wherein the spacer is made of a carbon fiber material, the through-hole communicates with the upper bone and the lower bone, and the length of the spacer can be changed in the longitudinal direction in which the upper bone and the lower bone are arranged.

Description

Carbon material filling connecting member for bone defect repair

[0001] The present invention relates to a carbon material filling connecting member for bone defect repair, and more particularly, to a carbon material filling connecting member for bone defect repair that connects severed bones when bone has been removed due to bone tumor or trauma.

[0002] Bone defect is a medical term, and refers to a condition where there is an empty space where bone should be.

[0003] These bone defects are caused by trauma or diseases such as bone tumors.

[0004] The most common cause is post-traumatic, but with the recent increase in bone lengthening surgeries, the number of bone defects resulting from bone not forming properly after bone lengthening is also increasing.

[0005] Additionally, bone loss can also occur in traumatic degenerative bone diseases.

[0006] Meanwhile, a tumor means that the cells in our body continue to grow abnormally and proliferate beyond normal control.

[0007] Tumors can be benign or malignant. The characteristic of malignant tumors is that they can spread to other areas than the original site of origin, and in some cases, can be life-threatening.

[0008] In contrast, benign tumors do not metastasize and often do not affect life.

[0009] Bone tumors literally mean tumors that occur in the bones, and bone tumors also include benign and malignant tumors.

[0010] Bone tumors can develop in any bone, including the arms, legs, pelvis, and spinal cord, but they most commonly occur around the knees, shoulder joints, or pelvic bones.

[0011] Usually, when a bone tumor occurs, the tumor area is removed through surgery, which results in bone loss.

[0012] In case of bone loss due to trauma or diseases such as bone tumors, a spacer made of metal or other material is inserted between the severed bones in the area of ​​bone loss to connect them.

[0013] However, if these conventional spacers are made of metal such as iron, they are heavy, have too high a strength, cause stress shielding effects, and have the inconvenience of having to be removed later.

[0014] This invention is being carried out as a result of the following national research and development project.

[0015] * Assignment ID: 090-091-3000-3039-301

[0016] * Ministry Name: Ministry of Health and Welfare

[0017] * Research Project Name: Biocompatible New Material Medical Device Industry Promotion Project

[0018] * Research Project Name: Carbon Material Biocompatibility Medical Device Support Center Construction Project

[0019] * Host institution: Chonbuk National University Hospital

[0020] * Research period: September 1, 2020 - December 31, 2023

[0021] The present invention is intended to solve the above-mentioned problems, and the purpose of the present invention is to provide a carbon material filling connecting member for bone defect repair, which is light in weight, has a strength that is not too high, does not require removal later, and reduces the burden in terms of cost by inserting and placing a spacer made of carbon fiber material between bones separated by a bone defect.

[0022] In order to achieve the above object, the present invention provides a carbon material filling connecting member for bone defect repair, which is a filling connecting member for bone defect repair that connects bones that are separated from each other due to bone defects, comprising: a hollow column-shaped spacer that is arranged between an upper bone and a lower bone that are cut and separated from each other, and has a through hole formed therein; two or more supports arranged laterally of the upper bone, the spacer, and the lower bone; and a fastening member that connects the supports to the upper bone, the spacer, and the lower bone; wherein the spacer is made of a carbon fiber material, the through hole is communicated with the upper bone and the lower bone, and the spacer is characterized in that its length can be changed in the longitudinal direction in which the upper bone and the lower bone are arranged.

[0023] The spacer comprises a first spacer and a second spacer, and the length of the spacer can be changed by stacking and bonding the first spacer and the second spacer to each other.

[0024] The spacer comprises a hollow body portion; an upper engaging protrusion formed to protrude upward from an upper portion of the body portion and having an outer diameter smaller than an outer diameter of the body portion; and a lower engaging groove formed to be concavely recessed from a lower portion of the body portion and having an outer diameter smaller than the outer diameter of the body portion and the same as an outer diameter of the upper engaging protrusion; wherein the through hole is formed long enough to penetrate the body portion, the upper engaging protrusion, and the lower engaging groove, and the upper engaging protrusion of the first spacer is fitted into the lower engaging groove of the second spacer arranged at the upper portion so that the length of the spacer can be changed.

[0025] A screw thread is formed on the outer surface of the upper coupling protrusion, and a screw thread is formed on the lower coupling groove, so that the upper coupling protrusion and the lower coupling groove can be screw-coupled to each other.

[0026] The length of the spacer may be finely adjusted according to the screw fastening amount of the upper coupling protrusion and the lower coupling groove according to rotation, and a locking member may be further included to prevent the first spacer and the second spacer from rotating any further.

[0027] The above spacer further comprises a cover member that covers the upper portion of the spacer that is placed at the top when a plurality of spacers are laminated and connected to each other; wherein the cover member covers the upper coupling protrusion to make the upper portion of the spacer flat.

[0028] According to the carbon material filling connecting member for bone defect repair of the present invention as described above, the following effects are provided.

[0029] The present invention allows for the smooth and rapid repair of bone defects by inserting and placing a spacer between bones that are spaced apart from each other when a bone defect occurs due to traumatic amputation or the like, and fixing the spacer with a support and a fastening member, thereby stably supporting bones that are spaced apart due to amputation or the like, while allowing the bones to grow through the spacer.

[0030] In addition, since the spacer is made of carbon fiber material, it is light in weight and has a strength that is not too high, so it can prevent stress shielding, does not need to be removed later, and can be economical in terms of cost.

[0031] In addition, the length of the spacer can be varied, so that the spacer can be inserted and positioned by adjusting its length to fit the gap between the upper and lower bones.

[0032] Figure 1 is a drawing for explaining a state in which a bone is connected using a carbon material filling connecting member for bone defect repair according to an embodiment of the present invention.

[0033] Figure 2 is an exploded cross-sectional view of a spacer according to an embodiment of the present invention;

[0034] Figure 3 is a cross-sectional structural diagram of an assembled spacer according to an embodiment of the present invention.

[0035] Figure 4 is a cross-sectional structural diagram of a spacer according to an embodiment of the present invention placed between bones.

[0036] FIG. 1 is a drawing for explaining a state in which a bone is connected with a carbon material filling connecting member for bone defect repair according to an embodiment of the present invention, FIG. 2 is an exploded cross-sectional view of a spacer according to an embodiment of the present invention, FIG. 3 is a cross-sectional structural view of an assembled spacer according to an embodiment of the present invention, and FIG. 4 is a cross-sectional structural view of a spacer according to an embodiment of the present invention placed between bones.

[0037] The carbon material filling connecting member for bone defect repair of the present invention is configured to connect bones at a point where a bone defect has occurred due to trauma or disease, and comprises a spacer (10), a support (20), and a fastening member (30), as illustrated in FIG. 1.

[0038] As mentioned in the background art, bone defects are caused by trauma or diseases (such as bone tumors). In the following example, a case in which bone defects are caused by surgery for a bone tumor is described as an example.

[0039] When a bone tumor occurs between bones as shown in Fig. 1(a), the bone is cut to remove the bone tumor as shown in Fig. 1(b).

[0040] Thereafter, as shown in Fig. 1(c), the carbon connecting member of the present invention is installed between the cut bones.

[0041] The above spacer (10) is placed between the upper and lower bones, which are cut and spaced apart from each other.

[0042] Of course, depending on the arrangement direction of the bones, the spacer (10) may be arranged between the left bone and the right bone, and in this embodiment, the description is based on the state in which the bones are arranged in the vertical direction.

[0043] And in this example, when the bone was cut to remove a bone tumor, the bone located above the cut site was called the upper bone, and the bone located below the cut site was called the lower bone.

[0044] The above spacer (10) is inserted and placed between the upper and lower bones.

[0045] The above spacer (10) is formed in a hollow column shape, and a through hole (14) formed inside is formed in the direction of arrangement of the bones.

[0046] That is, the through hole (14) formed inside the spacer (10) communicates with the end of the upper bone and the end of the lower bone.

[0047] Therefore, when the upper and lower bones grow in the future, they can grow through the above-mentioned through hole (14).

[0048] In the present invention, the spacer (10) is made of carbon fiber material.

[0049] Since the above spacer (10) is made of carbon fiber material, it is lighter than metals such as iron, has higher strength, and is less expensive. In particular, since the strength of the spacer is not too high, it can prevent stress shielding.

[0050] The above spacer (10) allows the length of the upper and lower bones to be changed in the longitudinal direction.

[0051] By allowing the length of the spacer (10) to be changed as described above, the spacer (10) can be inserted and positioned by extending it to an appropriate length to match the distance between the upper and lower bones.

[0052] The above spacer (10) can have its length changed in various ways and structures.

[0053] In this embodiment, the spacer (10) comprises one or more first spacers (10a) and one or more second spacers (10b).

[0054] As shown in FIGS. 2 to 4, the spacer (10) is configured such that the first spacer (10a) and the second spacer (10b) are laminated and bonded to each other so that their lengths can be changed.

[0055] For this purpose, the spacer (10) is composed of a body part (11), an upper coupling protrusion (12), and a lower coupling groove (13).

[0056] The above body part (11) is formed in a hollow column shape.

[0057] The upper coupling protrusion (12) is formed to protrude upward from the upper portion of the body portion (11) and has an outer diameter smaller than the outer diameter of the body portion (11).

[0058] The lower coupling groove (13) is formed by being concavely sunken in the lower portion of the body portion (11), and has an outer diameter that is smaller than the outer diameter of the body portion (11) and the same as the outer diameter of the upper coupling protrusion (12).

[0059] The above through hole (14) is formed long and passes through the body part (11), upper coupling protrusion (12) and lower coupling groove (13).

[0060] Accordingly, the upper coupling protrusion (12) is formed in a hollow shape and is formed in a shape that protrudes upward along the upper circumference of the through hole (14).

[0061] And the lower joining groove (13) is formed by being concave along the lower circumference of the through hole (14).

[0062] The first spacer (10a) and the second spacer (10b) are laminated and joined to each other, and the upper joining projection (12) of the first spacer (10a) is fitted into the lower joining groove (13) of the second spacer (10b) placed on the upper side.

[0063] By alternately stacking multiple first spacers (10a) and second spacers (10b) as above, the length of the spacer (10) can be easily changed.

[0064] The first spacer (10a) and the second spacer (10b) may have the same length or different lengths.

[0065] In some cases, the spacer (10) may further include a third spacer or a fourth spacer having different lengths.

[0066] The upper coupling protrusion (12) and the lower coupling groove (13) may be simply fitted together, but in order to increase the fastening force of the upper coupling protrusion (12) and the lower coupling groove (13), it is preferable that screw threads be formed on the outer surface of the upper coupling protrusion (12) and screw threads be formed on the lower coupling groove (13), so that the upper coupling protrusion (12) and the lower coupling groove (13) are mutually screw-connected.

[0067] In addition, the length of the spacer (10) completed by combining the first spacer (10a) and the second spacer (10b) can be finely adjusted according to the screw fastening amount of the upper coupling protrusion (12) and the lower coupling groove (13) according to the rotation.

[0068] Fig. 3(a) illustrates that the length of the spacer (10) is increased by reducing the amount of screw fastening between the upper coupling protrusion (12) and the lower coupling groove (13), and Fig. 3(b) illustrates that the length of the spacer (10) is relatively shortened by increasing the amount of screw fastening between the upper coupling protrusion (12) and the lower coupling groove (13).

[0069] In this case, the carbon material filling connecting member for bone defect repair of the present invention is configured to further include a separate locking member (not shown) that prevents the first spacer (10a) and the second spacer (10b) from rotating any further.

[0070] As described above, by preventing the first spacer (10a) and the second spacer (10b) from rotating any further by the locking member, the distance between the first spacer (10a) and the second spacer (10b) that are screw-coupled can be finely adjusted and the length thereof maintained as is, thereby enabling the change in the length of the spacer (10) to be finely adjusted.

[0071] The above support (20) is composed of two or more and is placed laterally on the upper bone, spacer (10) and lower bone.

[0072] The above support (20) is formed in the shape of a long rod.

[0073] The above fastening member (30) is made of a screw or the like, and fixes and connects the support (20) to the upper bone, spacer (10), and lower bone.

[0074] In addition, the spacer (10) may further include a cover member (15) that covers the upper portion of the spacer (10) that is placed at the top when a plurality of spacers (10) are laminated and connected to each other.

[0075] The above cover member (15) covers the upper coupling protrusion (12) and flattens the upper end of the spacer (10).

[0076] In the absence of the above cover member (15), the upper connecting protrusion (12) faces the lower part of the upper bone, and in this case, the contact area between the lower part of the upper bone and the upper connecting protrusion (12) is small, so the supporting force may be reduced.

[0077] However, as in the present invention, the cover member (15) covers the upper coupling protrusion (12) to make the upper end of the spacer (10) flat, so that when the upper coupling protrusion (12) is placed on the lower end of the upper bone as shown in FIG. 4, the lower end of the upper bone can be brought into contact with the upper surface of the cover member (15) over a large area, thereby increasing the supporting force.

[0078] As described above, the present invention inserts and places a spacer (10) between bones that are spaced apart from each other when a bone defect occurs due to trauma, amputation, etc., and fixes it with the support (20) and the fastening member (30), thereby stably supporting the bones that are spaced apart due to amputation, etc., while allowing the bones to grow through the spacer (10), thereby enabling smooth and rapid repair of the bone defect.

[0079] In addition, since the spacer (10) is made of carbon fiber material, it can be made light and have high strength.

[0080] In addition, the length of the spacer (10) can be varied, so that the length of the spacer (10) can be adjusted and inserted to fit the gap between the upper and lower bones.

[0081]

[0082] The carbon material filling connecting member for bone defect repair of 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.

[0083] The present invention has industrial applicability because it can be applied to a carbon material filling connecting member for bone defect repair.

Claims

1. In a filling connecting member for bone defect repair that connects bones separated from each other due to bone defect, A hollow column-shaped spacer positioned between the upper and lower bones, which are spaced apart from each other, and having a through hole formed inside; Two or more supports arranged laterally on the upper bone, spacer and lower bone; It comprises a fastening member that connects the above support to the upper bone, spacer and lower bone; The above spacer is made of carbon fiber material, The above-mentioned through-hole communicates with the upper and lower bones, A carbon material filling connecting member for bone defect repair, characterized in that the spacer can have its length changed in the longitudinal direction in which the upper and lower bones are arranged.

2. In claim 1, The above spacer comprises a first spacer and a second spacer, A carbon material filling connecting member for bone defect repair, characterized in that the spacer is a first spacer and a second spacer that are laminated and bonded to each other so that their lengths can be changed.

3. In claim 2, The above spacer, A hollow body; An upper coupling protrusion formed to protrude upward from the upper portion of the body portion and having an outer diameter smaller than the outer diameter of the body portion; It comprises a lower joining groove formed by being concavely sunken in the lower part of the above body portion and having an outer diameter smaller than the outer diameter of the above body portion and the same outer diameter as the upper joining protrusion; The above through hole is formed long through the body part, the upper joining projection and the lower joining groove, A carbon material filling connecting member for bone defect repair, characterized in that the upper coupling protrusion of the first spacer is fitted into the lower coupling groove of the second spacer arranged at the top so that the length of the spacer can be changed.

4. In claim 3, A carbon material filling connecting member for bone defect repair, characterized in that a screw thread is formed on the outer surface of the upper coupling protrusion, and a screw thread is formed in the lower coupling groove, so that the upper coupling protrusion and the lower coupling groove are mutually screw-connected.

5. In claim 4, The length of the spacer is finely adjusted according to the screw fastening amount of the upper coupling protrusion and the lower coupling groove according to the rotation. A carbon material filling connecting member for bone defect repair, characterized in that it further includes a locking member that prevents the first spacer and the second spacer from further rotating.

6. In claim 3 or claim 4, The above spacer, It is further comprised of a cover member that covers the upper part of the spacer that is placed at the uppermost position when a plurality of spacers are laminated and joined to each other; A carbon material filling connecting member for bone defect repair, characterized in that the above cover member covers the upper joining projection and flattens the upper end of the spacer.

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