Implant prosthesis for acetabular bone defect and manufacturing method

Abstract

The invention provides an implant prosthesis for acetabular bone defect and a manufacturing method, the implant prosthesis comprises a keel body and a hollow skeleton, one end of the keel body is provided with a connecting part connected with the top wall of the pelvis, the other end of the keel body is provided with a curved plate, and the upper surface and the lower surface of the curved plate are both lower than the upper surface and the lower surface of the connecting part; the size of the cross section of the curved plate in the radian direction is gradually increased from the connecting part end to the end far away from the connecting part, and the curved plate shrinks at the end face of the other end close to the keel body to form a preset cross section so as to adapt to the anatomic form of the acetabulum; the hollowed-out framework is connected to the other end of the keel body through bone cement and wraps and covers the curved plate. The hollow skeleton further extends out of the other end of the keel body and is used for being connected with a transpubic ramus pelvic defect prosthesis; the keel body and the hollow skeleton are both made of an osseointegration material or a bone biocompatibility material; the stability of acetabular bone defect reconstruction can be greatly improved, and the risk of loosening of the implanted prosthesis is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an implant prosthesis for acetabular bone defect and a manufacturing method thereof. Background Art

[0002] In the treatment of acetabular bone defects, stability and reconstruction are the key to achieving long-term success. Current treatment methods mainly include acetabular bone grafting and prosthetic reconstruction. However, due to the complex anatomical structure of the acetabular region and the problems of bone loss or bone defects, existing prosthetic implants are often difficult to achieve sufficient stability, especially in cases of severe bone defects. Traditional acetabular reconstruction methods mainly rely on autologous bone or allogeneic bone grafting. These methods have problems such as poor bone integration, bone absorption, and insufficient transplanted bone, which increase the risk of prosthesis loosening or failure; in addition, the existing metal fixation structure in acetabular reconstruction lacks effective connection with the pubic ramus, resulting in insufficient overall structural stability.

[0003] Therefore, there is an urgent need for an implant prosthesis for acetabular bone defects and a manufacturing method that can greatly improve the stability of acetabular bone defect reconstruction and significantly reduce the risk of loosening of the implant prosthesis. Summary of the invention

[0004] The purpose of the present invention is to provide an implant prosthesis for acetabular bone defects and a manufacturing method, aiming to solve the technical problems of poor reconstruction stability and easy loosening of the traditional implant prosthesis for acetabular bone defects.

[0005] To achieve the above-mentioned object, in a first aspect, the present invention provides an implant prosthesis for acetabular bone defect, comprising a keel body and a hollow frame.

[0006] One end of the keel body is provided with a connecting portion connected to the top wall of the pelvis, and the other end of the keel body is provided with a curved plate, and the upper and lower surfaces of the curved plate are lower than the upper and lower surfaces of the connecting portion;

[0007] The cross-sectional dimension of the curved plate along the curvature direction thereof gradually increases from the connecting portion end to the end away from the connecting portion end, and shrinks to a preset cross-sectional dimension near the end surface of the other end of the keel body to adapt to the anatomical shape of the acetabulum;

[0008] The hollow skeleton is connected to the other end of the keel body through bone cement, and wraps and covers the curved panel;

[0009] The hollow skeleton also extends out of the other end of the keel body for connection with the pelvic defect prosthesis through the pubic ramus; the keel body and the hollow skeleton are both made of bone integration material or bone biocompatible material.

[0010] As a further improvement of the above solution, a curved panel wrapped with a hollow frame is provided so that the upper and lower surfaces of the other end of the keel body and the upper and lower surfaces of the connecting portion are smoothly connected on the same curved surface.

[0011] As a further improvement of the above solution, the shape of the cross section is elliptical, rectangular or irregular, and the variation pattern of the cross section size is linear or nonlinear gradual change.

[0012] As a further improvement of the above solution, the surfaces of the keel body and the hollow skeleton are provided with a bioactive coating or an osteoinductive material to promote the growth and bonding of bone tissue.

[0013] As a further improvement of the above solution, the surface of the keel body is treated with micropores, and the pore size of the micropores is 50-200 μm to promote the growth and integration of bone tissue.

[0014] As a further improvement of the above solution, the connecting portion is an arc-shaped structure matching the shape of the top wall of the pelvis, and is provided with at least two connecting holes, which are evenly spaced along the arc direction of the connecting portion.

[0015] As a further improvement of the above solution, the connecting hole is a Kirschner wire hole, which is used to fix the prosthesis on the top wall of the pelvis through screws and Kirschner wires.

[0016] As a further improvement of the above solution, the bone integration material or bone biocompatible material is one of tantalum, titanium alloy, and cobalt-chromium alloy.

[0017] As a further improvement of the above solution, a blind hole for inserting the curved panel is provided in the hollow skeleton, and the blind hole matches the shape of the curved panel.

[0018] In a second aspect, the present invention further provides a method for manufacturing an implant prosthesis for acetabular bone defect as provided in the first aspect, the steps comprising:

[0019] S1: Use computer-aided design tools to create a three-dimensional model of the implant prosthesis for the acetabular bone defect;

[0020] S2: importing the three-dimensional model created in step S1 into a 3D printing device, selecting a bone biocompatible metal powder as a printing material, starting the 3D printing device, and printing the keel body and the hollow skeleton based on the three-dimensional model respectively;

[0021] S3: heat treatment and surface treatment of the 3D printed keel body and hollow skeleton;

[0022] S4: Assembling the keel body and the hollow frame that have passed the quality inspection; firstly evenly coating a layer of bone cement on all surfaces of the curved plate of the keel body, and then inserting the curved plate into the receiving blind hole of the hollow frame.

[0023] Since the present invention adopts the above technical solution, the beneficial effects of this application are:

[0024] The present invention provides an implant prosthesis for acetabular bone defect. The implant prosthesis for acetabular bone defect of the present invention has a gradual increase in the cross-sectional size along the arc direction from the connecting portion end to the end away from the connecting portion end by designing a gradual structure of the curved plate. This structure can better adapt to the anatomical morphology of the acetabulum, ensure that the prosthesis and the pelvis fit more closely, thereby improving the stability and biomechanical properties after implantation; by providing a curved plate at the other end of the keel body and wrapping a hollow frame outside the curved plate, the prosthesis structure of the present invention not only enhances the overall stability, but also enables it to be connected to the pelvic defect prosthesis through the pubic ramus through the extended design of the hollow frame, further expanding the scope of application and connection flexibility of the prosthesis;

[0025] The keel body and the hollow frame are both made of bone integration material or bone biocompatible material, which enables the implant prosthesis to gradually fuse with the surrounding bone tissue after implantation, promotes the growth and repair of bone tissue, reduces the risk of bone nonunion, and thus achieves a better long-term fixation effect; in particular, the hollow frame is wrapped outside the curved panel, and the hollow setting provides space for the growth of bone tissue, so that the implant prosthesis can be well fixed for a long time and is not easy to loosen;

[0026] In addition, the implant prosthesis can be customized according to the patient's specific anatomical structure, especially the gradient structure of the curved plate can be adjusted according to the actual shape of the acetabulum, thereby realizing a personalized implant plan and improving the success rate of the operation and the patient's satisfaction. The present invention significantly improves the adaptability, stability and biocompatibility of the acetabular bone defect implant prosthesis through unique structural design and material selection, providing a more effective and reliable solution for the repair of acetabular bone defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0028] Figure 1 It is a front view schematic diagram of an implant prosthesis for acetabular bone defect disclosed in the present invention;

[0029] Figure 2 It is a bottom view schematic diagram of an implant prosthesis for acetabular bone defect disclosed in the present invention;

[0030] Figure 3 It is a top view schematic diagram of an implant prosthesis for acetabular bone defect disclosed in the present invention;

[0031] Figure 4 It is a front view schematic diagram of the keel body disclosed in the present invention;

[0032] Figure 5 It is a bottom view schematic diagram of the keel body disclosed in the present invention;

[0033] Figure 6 It is a top view schematic diagram of the keel body disclosed in the present invention;

[0034] Figure 7 The present invention is a stereoscopic schematic diagram of an implant prosthesis for acetabulum bone defect disclosed in the present invention installed at a pelvic defect.

[0035] Reference numerals:

[0036] 01. Implant prosthesis for acetabular bone defect; 1. keel body; 11. connection part; 12. curved plate; 121. acetabular surface; 122. pelvic surface; 13. step surface; 14. concave; 2. hollow skeleton; 21. connection end; 3. connection hole;

[0037] 02. Ilium; 03. Pubis; 04. Ischium.

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0042] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] Example 1

[0044] See also Figure 1-Figure 7 The present invention provides an implant prosthesis for acetabular bone defect, comprising a keel body 1 and a hollow skeleton 2, wherein the keel body 1 is designed with a bionic anatomical morphology.

[0045] One end of the keel body 1 is provided with an arc-shaped connecting portion 12 connected to the top wall of the pelvis, and the other end of the keel body 1 is provided with a curved panel, and the hollow skeleton 2 is fixed to the other end of the keel body 1 by bone cement, wrapping and covering the curved panel; specifically, the upper and lower surfaces of the connecting portion 12 are curved structures, and the radius of the arc is 50-70mm, preferably matching the curvature of the top wall of the pelvis; the connecting portion 12 is provided with a plurality of bone screw connecting holes 3, the aperture of the connecting holes 3 is 3.5-5.0mm, and the connecting holes 3 are evenly spaced along the arc direction of the connecting portion 12;

[0046] The upper and lower surfaces of the curved plate are lower than the upper and lower surfaces of the connecting portion 12. For details, see Figure 5 , which faces the lower surface of the acetabulum, is the acetabular surface 121; see Figure 6 , away from the upper surface of the acetabulum, is the pelvic surface 122; two upper and lower step surfaces 13 are formed at the joint with the connecting portion 12, so as to facilitate the wrapping and covering of the hollow skeleton 2 to promote the growth of bone tissue;

[0047] The cross-sectional dimension of the curved plate along its curvature direction gradually increases from the end of the connecting portion 12 to the end away from the connecting portion 12, and shrinks to a preset cross-sectional area near the end face of the other end of the keel body 1 to adapt to the anatomical morphology of the acetabulum; the thickness of the curved plate gradually increases from the connecting portion 12 to the distal end, and the end shrinks at a preset shrinkage angle to form a preset end face, specifically, a notch 14 is formed at the distal end of the curved plate during shrinkage; preferably, the proximal thickness t1 is 2-3mm, and the distal maximum thickness t2 is 4-6mm; its cross-sectional width W gradually expands from 15mm at the proximal end to 25mm at the distal end; a microporous structure is provided on the surface of the curved plate, with a pore size of 200-500μm and a porosity of 60%-70% to promote bone tissue growth;

[0048] The hollow skeleton 2 also extends out of the other end of the keel body 1 to form a connecting end 21. Specifically, the hollow skeleton 2 includes a main frame and a connecting end 21. The main frame wraps the surface of the curved panel, and its grid unit is preferably a diamond structure; the connecting end 21 is 20-40 mm long and is used to connect to the pelvic defect prosthesis through the pubic 03 branch.

[0049] The keel body 1 and the hollow skeleton 2 are both made of bone integration material or bone biocompatible material; in this embodiment, the keel body 1 and the hollow skeleton 2 are made of porous tantalum alloy with a porosity of ≥60% and an elastic modulus of 3-5 GPa, preferably treated with a surface hydroxyapatite coating;

[0050] The acetabular bone defect implant prosthesis of the present invention is designed with a gradual structure of the curved plate so that the cross-sectional size along the arc direction gradually increases from the end of the connection part 12 to the end away from the connection part 12. This structure can better adapt to the anatomical morphology of the acetabulum, ensure that the prosthesis fits the pelvis more closely, thereby improving the stability and biomechanical properties after implantation; by arranging a curved plate at the other end of the keel body 1 and wrapping a hollow frame 2 outside the curved plate, the prosthesis structure of the present invention not only enhances the overall stability, but also through the extended design of the hollow frame 2, it can be connected to the pelvic defect prosthesis through the pubic 03 branch bone, further expanding the scope of application and connection flexibility of the prosthesis;

[0051] The keel body 1 and the hollow frame 2 are both made of bone integration material or bone biocompatible material, which enables the implanted prosthesis to gradually fuse with the surrounding bone tissue after implantation, promotes the growth and repair of bone tissue, reduces the risk of bone nonunion, and thus achieves a better long-term fixation effect; especially, the hollow frame 2 is wrapped outside the curved panel, and the hollow setting provides space for the growth of bone tissue, so that the implanted prosthesis can be well fixed for a long time and is not easy to loosen;

[0052] In addition, the implant prosthesis can be customized according to the patient's specific anatomical structure, especially the gradient structure of the curved plate can be adjusted according to the actual shape of the acetabulum, thereby realizing a personalized implant plan and improving the success rate of the operation and the patient's satisfaction. The present invention significantly improves the adaptability, stability and biocompatibility of the acetabular bone defect implant prosthesis through unique structural design and material selection, providing a more effective and reliable solution for the repair of acetabular bone defects.

[0053] As a preferred embodiment, see Figure 1 and Figure 2 , a curved panel wrapped with a hollow skeleton 2 makes the upper and lower surfaces of the other end of the keel body 1 and the upper and lower surfaces of the connecting part 12 connected to the same curved surface; this design can ensure the overall smooth transition of the implant prosthesis, reduce damage to surrounding tissues during implantation, and improve the stability of the prosthesis.

[0054] As a preferred embodiment, the cross-section is elliptical, rectangular or irregular, and the variation rule of the cross-section size is linear or nonlinear gradual change; this design can better adapt to the anatomical morphology of the acetabulum and improve the adaptability and biomechanical properties of the prosthesis;

[0055] Specifically, in this embodiment, the cross section is elliptical, and the curved plate forms an elliptical gradient structure, whose major axis size changes gradually from the proximal end to the distal end according to a quadratic function law, and the minor axis size changes gradually according to a linear law, and the surface roughness of the gradient transition area Ra≤1.6μm.

[0056] As a preferred embodiment, the surfaces of the keel body 1 and the hollow skeleton 2 are provided with a bioactive coating or an osteoinductive material to promote the growth and bonding of bone tissue; the surface treatment can significantly improve the integration effect of the prosthesis and bone tissue and reduce the risk of bone nonunion.

[0057] As a preferred embodiment, the surface of the keel body 1 is microporous, and the pore size of the micropores is 50-200 μm, so as to promote the growth and integration of bone tissue and further improve the biocompatibility and stability of the implant prosthesis;

[0058] In this embodiment, the microporation treatment adopts a laser drilling process to form a honeycomb microporous array with a pore size of 100±20 μm on the surface of the keel body 1, the porosity is controlled between 65%-75%, and the microporous depth is 200-300 μm.

[0059] As a preferred embodiment, the connecting portion 12 is an arc-shaped structure that matches the shape of the pelvic top wall, and the connecting hole 3 can be a Kirschner wire hole, which is used to fix the implant prosthesis on the pelvic top wall through screws and Kirschner wires; this arrangement can ensure stable fixation of the implant prosthesis and reduce the risk of postoperative displacement;

[0060] In this embodiment, the arc curvature radius R of the connecting portion 12 is 35-45 mm, and the matching degree with the anatomical curvature of the top wall of the pelvis is more than 95%. Two Kirschner wire holes with a diameter of 3.5 mm are opened at equal intervals along the arc axis.

[0061] As a preferred embodiment, the bone integration material or bone biocompatible material is one of tantalum, titanium alloy, and cobalt-chromium alloy; in this embodiment, the bone integration material or bone biocompatible material is tantalum material, which can significantly improve the bone integration ability of the implanted prosthesis.

[0062] As a preferred embodiment, a blind hole for inserting the curved panel is provided in the hollow skeleton 2, and the blind hole matches the shape of the curved panel; such a setting can ensure a close fit between the curved panel and the hollow skeleton 2, thereby improving the overall structural stability of the prosthesis.

[0063] In order to verify the stability of the implant prosthesis 01 for the acetabular bone defect, a pelvic model test was carried out in a laboratory environment. The implant prosthesis 01 for the acetabular bone defect was implanted into the simulated acetabular bone defect to test the stability of the implant prosthesis in different stress directions. The results showed that the implant prosthesis 01 for the acetabular bone defect had good supporting capabilities under both vertical and horizontal stresses.

[0064] In order to further verify the stability of the implant prosthesis 01 for the acetabular bone defect, a repair operation was performed on a patient with acetabular bone defect. The specific implantation steps are as follows:

[0065] Before surgery, the acetabular defect morphology is reconstructed in three dimensions based on CT data, the curvature radius of the curved plate of the keel body 1 and the length of the connecting end 21 are individually designed, and then the hollow skeleton 2 is matched and designed;

[0066] Pre-treat the defect area;

[0067] See also Figure 7 , the implant prosthesis 01 for filling the acetabulum bone defect: first fix the connection part 12 to the top wall of the pelvic ilium 02 by screws, inject bone cement into the gap between the hollow skeleton 2 and the host bone, and connect it to the pubic bone 03 prosthesis through the connection end 21 after solidification; the implant prosthesis is arranged between the ilium 02 and the pubic bone 03 and the ischium 04 to form a support beam, so that the repair of the pelvis using the implant prosthesis has a stable support effect and is easy to fuse with the host bone tissue;

[0068] The follow-up at 3 months after surgery showed that the implanted prosthesis 01 in the acetabular bone defect was well integrated with the bone tissue.

[0069] In order to further verify the stability of the implant prosthesis 01 for acetabular bone defects, 5 patients were selected for comparative experiments, 3 of whom used the implant prosthesis 01 for acetabular bone defects provided by the present invention, and 2 used traditional bone grafting technology. The follow-up results 6 months after the operation showed that the patients using the implant prosthesis 01 for acetabular bone defects had better bone integration effect and higher prosthesis stability.

[0070] Example 2

[0071] The present invention also provides a method for manufacturing an implant prosthesis 01 for acetabular bone defect as described in Example 1, the steps of which include:

[0072] S1: Create 3D model: Use computer-aided design (CAD) software (such as Fusion 360, SolidWorks) to create a three-dimensional model of the implant prosthesis 01 in the acetabular bone defect;

[0073] S2: importing the three-dimensional model created in step S1 into a 3D printing device (exporting the design file into a format suitable for 3D printing, such as an STL or OBJ file), selecting a bone biocompatible metal powder as a printing material (in this embodiment, tantalum metal powder is selected as the printing material), starting the 3D printing device, and printing out the keel body 1 and the hollow skeleton 2 based on the three-dimensional model respectively;

[0074] S3: heat treatment and surface treatment are performed on the 3D printed keel body 1 and the hollow skeleton 2; specifically, the heat treatment:

[0075] Annealing, solution treatment or other heat treatment of printed parts to reduce residual stress and improve mechanical properties;

[0076] Surface treatment: sandblasting, polishing, machining, etc. are performed as required to improve the surface quality or meet specific size requirements; the surface of the keel body 1 and the hollow skeleton 2 is microporous to form a microporous structure with a pore size of 50-200μm to promote the growth and combination of bone tissue;

[0077] Coating the surface with bioactive coatings or osteoinductive materials, such as hydroxyapatite (HA) or growth factors, further promotes the growth and integration of bone tissue.

[0078] S4: Assemble the keel body 1 and the hollow frame 2 that have passed the quality inspection. The specific steps are as follows:

[0079] Perform quality inspection on the printed and processed keel body 1 and hollow skeleton 2 to ensure that their dimensional accuracy and surface quality meet the design requirements;

[0080] A layer of bone cement is evenly applied on all surfaces of the curved plate of the keel body 1 to ensure that the thickness of the bone cement is uniform and covers the entire surface;

[0081] Insert the curved plate into the receiving blind hole of the hollow frame 2 to ensure that the two are tightly matched to form a complete implant prosthesis;

[0082] The assembled prosthesis is subjected to final quality inspection, including size inspection, surface quality inspection and mechanical property test, to ensure that the prosthesis meets the clinical use standards.

[0083] By adopting the manufacturing method provided by the present invention, the three-dimensional model created by the computer-aided design tool can be personalized according to the specific anatomical structure of the patient, ensuring the accurate fit of the prosthesis and the acetabulum, improving the success rate of the operation and the patient's satisfaction; the keel body 1 and the hollow skeleton 2 manufactured by the 3D printing technology have good mechanical properties and structural stability, making the manufacturing process of the prosthesis more efficient and accurate, shortening the production cycle, reducing production costs, and improving the quality and consistency of the prosthesis. During the assembly process, the close fit between the curved plate and the hollow skeleton 2 further enhances the overall structural stability of the prosthesis.

[0084] The method for manufacturing the acetabular bone defect implant prosthesis of the present invention significantly improves the adaptability, stability and biocompatibility of the prosthesis through advanced design and manufacturing technology, and provides a more effective and reliable solution for repairing acetabular bone defects.

[0085] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An implant prosthesis for acetabular bone defect, characterized in that: Including the keel body and the hollow frame, One end of the keel body is provided with a connecting portion connected to the top wall of the pelvis, and the other end of the keel body is provided with a curved plate, and the upper and lower surfaces of the curved plate are both lower than the upper and lower surfaces of the connecting portion; The cross-sectional dimension of the curved plate along the curvature direction thereof gradually increases from the connecting portion end to the end away from the connecting portion end, and shrinks to a preset cross-sectional dimension near the end surface of the other end of the keel body to adapt to the anatomical shape of the acetabulum; The hollow skeleton is connected to the other end of the keel body through bone cement, and wraps and covers the curved panel; The hollow skeleton also extends out of the other end of the keel body for connection with the pelvic defect prosthesis through the pubic ramus; the keel body and the hollow skeleton are both made of bone integration material or bone biocompatible material.

2. An implant prosthesis for acetabular bone defect according to claim 1, characterized in that: The curved panel wrapped with the hollow frame makes the upper and lower surfaces of the other end of the keel body and the upper and lower surfaces of the connecting part smoothly connect to the same curved surface.

3. An implant prosthesis for acetabular bone defect according to claim 1 or 2, characterized in that: The cross section is in an elliptical, rectangular or irregular shape, and the variation pattern of the cross section size is a linear gradient or a nonlinear gradient.

4. An implant prosthesis for acetabular bone defect according to claim 1 or 2, characterized in that: The surfaces of the keel body and the hollow frame are both provided with bioactive coatings or osteoinductive materials to promote the growth and bonding of bone tissue.

5. An implant prosthesis for acetabular bone defect according to claim 1 or 2, characterized in that: The surface of the keel body is processed with micropores, and the pore size of the micropores is 50-200 μm, so as to promote the growth and combination of bone tissue.

6. An implant prosthesis for acetabular bone defect according to claim 1 or 2, characterized in that: The connecting portion is an arc-shaped structure matching the shape of the top wall of the pelvis, and is provided with at least two connecting holes, which are evenly spaced along the arc-shaped direction of the connecting portion.

7. An implant prosthesis for acetabular bone defect according to claim 6, characterized in that: The connecting hole is a Kirschner wire hole, which is used to fix the prosthesis on the top wall of the pelvis through screws and Kirschner wires.

8. An implant prosthesis for acetabular bone defect according to claim 1 or 2, characterized in that: The bone integration material or bone biocompatible material is one of tantalum, titanium alloy and cobalt-chromium alloy.

9. An implant prosthesis for acetabular bone defect according to claim 1 or 2, characterized in that: The hollow frame is provided with a blind hole for inserting the curved panel, and the blind hole matches the shape of the curved panel.

10. A method for manufacturing an implant prosthesis for acetabular bone defect according to any one of claims 1 to 9, characterized in that: The steps include: S1: Use computer-aided design tools to create a three-dimensional model of the implant prosthesis for the acetabular bone defect; S2: importing the three-dimensional model created in step S1 into a 3D printing device, selecting a bone biocompatible metal powder as a printing material, starting the 3D printing device, and printing the keel body and the hollow skeleton based on the three-dimensional model respectively; S3: heat treatment and surface treatment of the 3D printed keel body and hollow skeleton; S4: Assembling the keel body and the hollow frame that have passed the quality inspection; firstly evenly coating a layer of bone cement on all surfaces of the curved plate of the keel body, and then inserting the curved plate into the receiving blind hole of the hollow frame.

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