Modular Hip Joint Revision Filler Structure and Usage

Abstract

This invention provides a combined hip joint revision filler structure, comprising: an iliac wing assembly, which includes an acetabular cup support and an iliac wing fixation portion integrally formed on the acetabular cup support; the outer side of the acetabular cup support is used to fit and provide support to the patient's acetabular cup, and the inner side of the iliac wing fixation portion is used to fit and fix to the patient's iliac wing; and a filler block, which is fixed to the iliac wing assembly and includes a fusion surface for fitting the patient's hip defect bone from below and a contact surface for fitting the inner side of the acetabular cup support. This invention improves the stability of the fixation structure by fitting and fixing the inner side of the iliac wing fixation portion to the patient's iliac wing, and also improves the convenience of subsequent positioning and screw placement. Simultaneously, the filler block also meets the need to fill hip defect bone, solving the problems of difficult positioning and screw placement of existing pre-made metal acetabular pads, and the inability to fill bone defects, which easily leads to acetabular prosthesis loosening.

Description

Technical Field

[0001] This invention relates to the field of acetabular revision prosthesis technology, and in particular to a combined hip joint revision filling pad structure and its usage method. Background Technology

[0002] Since the beginning of the 21st century, the number of total hip replacement surgeries worldwide has been increasing. As a result, the number of patients requiring hip prosthesis revision has also been increasing due to issues such as aseptic loosening of the prosthesis, periprosthetic osteolysis, wear particles in the liner, and infection.

[0003] Patients undergoing hip revision surgery often have severe and complex bone defects, which frequently occur above the acetabulum and can extend upwards to the ilium. Repairing periacetabular bone defects is fundamental to the success of hip revision surgery. Currently, for large periacetabular bone defects, prefabricated metal acetabular blocks are generally used for reconstruction, but they cannot perfectly match the original acetabular area morphologically and mechanically.

[0004] Meanwhile, the use of press-fit fixation for finished metal acetabular blocks, such as the method for acetabular bone defect reconstruction based on 3D printing disclosed in Chinese patent CN114259327A, leads to difficulties in acetabular block positioning and acetabular screw placement during surgery. It also fails to meet the needs of filling complex bone defects and supporting the acetabular cup, which can easily lead to loosening of the acetabular prosthesis, revision failure, and increased burden on patients and the medical system. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide a combined hip joint revision filling pad structure and a method of use, which solves the problems of difficulty in positioning and screw placement of prefabricated metal acetabular pads in the prior art, and the inability to fill bone defects, which easily leads to loosening of the acetabular prosthesis.

[0006] To address the aforementioned technical problems, this invention provides a combined hip joint revision filling pad structure, comprising:

[0007] The iliac wing assembly includes an acetabular cup support and an iliac wing fixation part integrally formed on the acetabular cup support. The outer side of the acetabular cup support is used to fit against and provide support to the patient's acetabular cup, and the inner side of the iliac wing fixation part is used to fit against and fix the patient's iliac wing.

[0008] A filler block, which is fixed to the iliac wing assembly, and the filler block includes a fusion surface for conforming to the patient's hip defect bone from below and a contact surface for conforming to the inner side of the acetabular cup support.

[0009] Preferably, the combined hip joint revision filling pad structure also includes orthopedic screws for fixing the iliac wing assembly and the filling block. Fixing the iliac wing assembly and the filling block with orthopedic screws is simple, convenient, and facilitates surgical operation.

[0010] Preferably, the iliac wing fixation part is provided with a fixation screw channel, through which the orthopedic screw passes to fix the iliac wing assembly to the patient's iliac wing.

[0011] Preferably, the acetabular cup support is provided with a first screw placement channel, through which the orthopedic screw passes and clamps the patient's iliac wing between the orthopedic screw and the iliac wing fixation part, thereby making the fixation of the combined hip joint revision filling pad structure of the present invention more secure.

[0012] Preferably, the acetabular cup support is provided with a second screw placement channel, and the corresponding position on the filling block is provided with a filling block screw placement channel. The orthopedic screw passes through the second screw placement channel and the filling block screw placement channel to fix the filling block to the iliac wing assembly. The iliac wing assembly and the filling block are fixed by the orthopedic screw, which is simple, convenient and easy to operate.

[0013] Preferably, the outer contour of the fusion surface is designed by reverse modeling based on the three-dimensional structure of the patient's actual hip defect bone, and the personalized filling block fusion surface can fit better with the patient's actual hip defect bone.

[0014] Preferably, the filling block and iliac wing assembly are made of metal 3D printing, which can be produced quickly according to the patient's personalized data, and can also meet the production requirements of various complex structures.

[0015] Preferably, the fusion surface, the outer surface of the acetabular cup support, and the inner surface of the iliac wing fixation part are provided with a porous structure to closely fit with the host bone tissue. The porous structure facilitates bone tissue ingrowth and bone fusion, thereby achieving long-term stability.

[0016] Preferably, the porous structure is a multi-directional microporous structure composed of multiple interconnected micropores.

[0017] The present invention also provides a method of using a combined hip joint revision filling pad structure, wherein the combined hip joint revision filling pad structure using any of the above-mentioned methods includes:

[0018] The filling block is then assembled and fixed to the iliac wing assembly.

[0019] The fusion surface of the filling block is used to fit the patient's hip bone defect, and the iliac wing assembly is fixed to the patient's iliac wing using the iliac wing fixation part;

[0020] The patient's acetabular cup is placed against the acetabular cup support.

[0021] As described above, the combined hip joint revision filler block structure and its usage method of the present invention have the following beneficial effects: When using the combined hip joint revision filler block structure of the present invention, firstly, the filler block is combined and fixed with the iliac wing assembly; then, the fusion surface of the filler block is used to conform to the patient's hip defect bone, and the iliac wing fixing part is used to fix the iliac wing assembly to the patient's iliac wing; finally, the patient's acetabular cup is abutted against the acetabular cup support part; the filler block and the iliac wing assembly adopt a separate design, wherein the filler block can be customized for different hip defect bones of the patient, and The iliac wing assembly can be mass-produced as a standard part and used independently. The modular design can provide personalized customization services for patients, while the use of standard parts can also reduce the burden on patients. The combined hip joint revision filling pad structure of the present invention is attached and fixed to the patient's iliac wing through the inner side of the iliac wing fixation part, which improves the stability of the fixation structure and the convenience of subsequent positioning and screw placement. At the same time, the filling block also meets the needs of filling hip bone defects, solving the problems of difficult positioning and screw placement of existing finished metal acetabular pads and the inability to fill bone defects, which easily leads to acetabular prosthesis loosening. Attached Figure Description

[0022] Figure 1 The diagram shown is a schematic diagram of the combined hip joint revision filling pad structure of the present invention.

[0023] Figure 2 The diagram shows the iliac wing component of the combined hip joint revision filling pad structure of the present invention.

[0024] Figure 3 The diagram shows a schematic of the filling block of the combined hip joint revision filling pad structure of the present invention.

[0025] Figure 4 The flowchart shown is a method of using the combined hip joint revision filling pad structure of the present invention.

[0026] Component designation explanation

[0027] 1. Iliac wing assembly

[0028] 11. Acetabular cup support

[0029] 111 Support inner side

[0030] 112 Support outer side

[0031] 113 First Pin Placement Channel

[0032] 114 Second pin placement channel

[0033] 12 Iliac wing fixation

[0034] 121 Fixed inner side

[0035] 122 Fixed pin channel

[0036] 2 Filling blocks

[0037] 21 fusion surfaces

[0038] 22 Contact surface

[0039] 23 Filler block pin placement channel Detailed Implementation

[0040] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0041] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0042] like Figures 1 to 3 As shown, the present invention provides a combined hip joint revision filling pad structure, comprising:

[0043] Iliac wing assembly 1, the iliac wing assembly 1 includes an acetabular cup support portion 11 and an iliac wing fixation portion 12 integrally formed on the acetabular cup support portion 11, the outer side of the acetabular cup support portion 11 is used to fit against and provide support to the patient's acetabular cup, and the inner side of the iliac wing fixation portion 12 is used to fit against and fix the patient's iliac wing.

[0044] The filling block 2 is fixed to the iliac wing assembly 1, and the filling block 2 includes a fusion surface 21 for conforming to the patient's hip defect bone from the lower side and a contact surface 22 for conforming to the inner side of the acetabular cup support 11.

[0045] When using the combined hip joint revision filling pad structure of the present invention, the filling block 2 is first combined and fixed with the iliac wing assembly 1; then, the fusion surface 21 of the filling block 2 is used to fit the patient's hip defect bone, and the iliac wing fixing part 12 is used to fix the iliac wing assembly 1 to the patient's iliac wing; finally, the patient's acetabular cup is abutted against the acetabular cup support part 11; the filling block 2 and the iliac wing assembly 1 adopt a split design, wherein the filling block 2 can be customized for different patients' hip defects, while the iliac wing assembly 1 can be mass-produced as a standard part and used separately. The split design can provide patients with personalized customization services, while the use of standard parts can also reduce the burden on patients.

[0046] In this embodiment, as Figure 1 as well as Figure 3 As shown, the acetabular cup support 11 and the iliac wing fixation 12 are plate-shaped parts that are fixed to each other at a certain angle. The acetabular cup support 11 includes a supporting inner side 111 and a supporting outer side 112. The supporting inner side 111 is in contact with the filling block 2, and the supporting outer side 112 is used to support the acetabular cup. The iliac wing fixation 12 includes a fixing inner side 121, which is used to be in contact with and fixed to the iliac bone. Further, in this embodiment, the size of the iliac wing fixation 12 is 45mm*45mm*4mm, and the size of the acetabular cup support 11 is 45mm*25mm*10mm.

[0047] In this embodiment, the combined hip joint revision filling pad structure also includes orthopedic screws for fixing the iliac wing assembly 1 and the filling block 2. Fixing the iliac wing assembly 1 and the filling block 2 with orthopedic screws is simple, convenient, and facilitates surgical operation.

[0048] Furthermore, in this embodiment, as Figure 1 as well as Figure 2 As shown, the iliac wing fixation part 12 is provided with a fixation screw channel 122, through which the orthopedic screw passes to fix the iliac wing assembly 1 to the patient's iliac wing; furthermore, in this embodiment, as... Figure 1 as well as Figure 2 As shown, a total of five fixing pin channels 122 are provided to meet the fastening requirements of fixing the iliac wing assembly 1 to the patient's iliac wing. At the same time, the fixing pin channels 122 can be increased or decreased according to the different conditions of each patient. Furthermore, the acetabular cup support 11 is provided with a first pin channel 113. The orthopedic screw passes through the first pin channel 113 and clamps the patient's iliac wing between the orthopedic screw and the iliac wing fixation part 12. In this way, the fixation of the combined hip joint revision filling pad structure of the present invention is more secure.

[0049] In this embodiment, as Figure 1 , Figure 2 as well as Figure 3 As shown, the acetabular cup support 11 is provided with a second screw placement channel 114, and the corresponding position on the filling block 2 is provided with a filling block screw placement channel 23. The orthopedic screw passes through the second screw placement channel 114 and the filling block screw placement channel 23 to fix the filling block 2 to the iliac wing assembly 1. The iliac wing assembly 1 and the filling block 2 are fixed by the orthopedic screw, which is simple, convenient and easy to operate.

[0050] In this embodiment, the outer contour of the fusion surface 21 is designed by reverse modeling based on the three-dimensional structure of the patient's actual hip defect bone. The customized filling block 2 fusion surface 21 can fit better with the patient's actual hip defect bone.

[0051] In this embodiment, the filling block 2 is manufactured using metal 3D printing, which allows for rapid production based on the patient's personalized data and can meet the production requirements of various complex structures. Furthermore, in this embodiment, the iliac bone wing assembly 1 can also be manufactured using 3D printing. In this embodiment, the metal used for 3D printing is titanium alloy. Titanium alloy has excellent corrosion resistance and exhibits excellent corrosion resistance in the environment of human blood immersion, ensuring good compatibility with human blood and cell tissues. As an implant, it will not cause human contamination or allergic reactions. At the same time, titanium alloy also has excellent strength and toughness, meeting the strength and toughness required for the implant to withstand long-term bending, torsion, compression, and muscle contraction forces. In addition, titanium alloy also has the advantages of being non-magnetic, non-toxic, and low-density.

[0052] In this embodiment, the fusion surface 21 is provided with a porous structure. Similarly, in this embodiment, the inner supporting surface 111, the outer supporting surface 112, and the inner fixing surface 121 are also provided with porous structures to achieve bone tissue ingrowth and bone fusion, thereby achieving long-term stability.

[0053] Furthermore, in this embodiment, the porous structure is a multi-directional microporous structure composed of multiple interconnected micropores, wherein the pore size of the micropores is 600μm to 800μm, the porosity is 60%-80%, and the thickness is 1.5mm-2.0mm.

[0054] like Figure 4 As shown, this embodiment also provides a method of using a combined hip joint revision filling pad structure. The combined hip joint revision filling pad structure using any of the above-mentioned methods includes:

[0055] S11: Based on the actual three-dimensional structure of the patient's hip defect bone, reverse modeling was used to design the three-dimensional models of the filling block 2 and the iliac wing component 1, and the models were manufactured using titanium alloy 3D printing technology.

[0056] S12: The obtained filling block 2 is combined and fixed with the iliac bone wing assembly 1, and the contact surface 22 of the filling block 2 is in contact with the inner side surface 111 of the support;

[0057] S13: The fusion surface 21 of the filling block 2 is used to fit the patient's hip defect bone, while the fixation inner surface 121 of the iliac wing fixation part 12 is used to fit the patient's iliac wing, and the iliac wing assembly 1 is fixed to the iliac wing using orthopedic screws.

[0058] S14: Use an orthopedic screw to pass through the first screw placement channel 113 and clamp the patient's iliac wing between the orthopedic screw and the iliac wing fixation part 12;

[0059] S15: The patient's acetabular cup is placed against the acetabular cup support 11, and the acetabular cup is in contact with the outer side 112 of the support.

[0060] In summary, the combined hip joint revision filling pad structure of the present invention is attached and fixed to the patient's iliac wing via the inner side of the iliac wing fixation part 12, which improves the stability of the fixation structure and the convenience of subsequent positioning and screw placement. Simultaneously, the filling block 2 also meets the need to fill hip bone defects, solving the problems of difficult positioning and screw placement of existing pre-made metal acetabular pads, and their inability to fill bone defects, which easily leads to acetabular prosthesis loosening. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0061] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A combined hip joint revision filling pad structure, characterized in that, include: Iliac wing assembly (1), the iliac wing assembly (1) includes an acetabular cup support (11) and an iliac wing fixation part (12) integrally formed on the acetabular cup support (11), the outer side of the acetabular cup support (11) is used to fit and provide support to the patient's acetabular cup, and the inner side of the iliac wing fixation part (12) is used to fit and fix to the patient's iliac wing; A filling block (2) is fixed to the iliac wing assembly (1), and the filling block (2) includes a fusion surface (21) for conforming to the patient's hip defect bone from the lower side and a contact surface (22) for conforming to the inner side of the acetabular cup support (11); wherein, the fusion surface (21), the outer side of the acetabular cup support (11) and the inner side of the iliac wing fixation part (12) are provided with a porous structure; the porous structure is a multi-directional microporous structure composed of multiple interconnected micropores; wherein, the pore size of the micropores is 600-800um, the porosity is 60%-80%, and the thickness is 1.5-2.0mm; Orthopedic screws are used to fix the iliac wing assembly (1) and the filler block (2); wherein, the iliac wing fixation part (12) is provided with a fixation screw placement channel (122), and the orthopedic screw passes through the fixation screw placement channel (122) to fix the iliac wing assembly (1) to the patient's iliac wing; wherein, the acetabular cup support part (11) is provided with a first screw placement channel (113), and the orthopedic screw passes through the first screw placement channel (113) to clamp the patient's iliac wing between the orthopedic screw and the iliac wing fixation part (12); wherein, the acetabular cup support part (11) is provided with a second screw placement channel (114), and the filler block (2) is provided with a corresponding position of a filler block screw placement channel (23), and the orthopedic screw passes through the second screw placement channel (114) and the filler block screw placement channel (23) to fix the filler block (2) to the iliac wing assembly (1).

2. The combined hip joint revision filling pad structure according to claim 1, characterized in that: The outer contour of the fusion surface (21) is designed by reverse modeling based on the three-dimensional structure of the patient's actual hip defect bone.

3. The combined hip joint revision filling pad structure according to claim 1, characterized in that: The filling block (2) and the iliac wing assembly (1) are made by metal 3D printing.

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