Reconstruction restoration body for proximal femur bone defect part and application of reconstruction restoration body

Abstract

The invention provides a reconstruction prosthesis for a proximal femur bone defect part and application of the reconstruction prosthesis. The reconstruction prosthesis covers one end, close to a femoral head prosthesis, of a femoral stem prosthesis, and comprises a main body part, the main body part is of a multi-layer pore structure and is provided with a through hole, and the main body part comprises a connecting end used for being inserted into a marrow cavity of a femur and a filling end matched with the anatomical form of a proximal bone defect part of the femur in the extending direction of the main body part, the femoral stem prosthesis is inserted into the through hole; the metal cylinder is arranged in the main body part and divides the main body part into an inner side main body part and an outer side main body part along the thickness direction; and the bone cement connecting piece is formed by bone cement filled in the inner side main body part and is used for connecting the femoral stem prosthesis with the metal cylinder and fixing the femoral stem prosthesis. The reconstruction prosthesis provided by the invention is applied to an orthopedic hip joint prosthesis revision operation, and has the advantages of good bone defect filling effect and good hip joint prosthesis fixing effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of hip joint revision, and in particular relates to a reconstruction prosthesis for a proximal femoral bone defect and an application thereof. Background Art

[0002] Clinically, after hip replacement (total hip or hemihip), patients may experience proximal femoral bone loss and bone defect formation due to trauma, tumors, osteoporosis, prosthesis loosening, stress shielding, etc. This bone defect problem, especially proximal femoral bone defect, is one of the reasons for the need for revision hip replacement. In revision surgery, if the prosthesis is simply replaced, it is usually difficult to obtain a reliable fixation effect, especially for patients with Paprosky types II, III, and IV. This severe proximal femoral bone defect will significantly increase the difficulty of revision in orthopedic diagnosis and treatment surgery.

[0003] At present, for patients with large proximal femoral bone defects, commonly used clinical treatment methods include distal fixation, compression bone grafting, and allogeneic bone transplantation. However, these methods have certain limitations in practice. For example, distal fixation can easily lead to stress concentration, while compression bone grafting and allogeneic bone grafting require a large amount of bone grafting materials, especially in cases of severe bone defects. In addition, the grafted bone is difficult to meet the shape requirements and clinical needs of the defect site. Therefore, the prognosis of these traditional methods is limited and often unsatisfactory. In addition, although some doctors have tried to use materials such as titanium mesh to assist in filling proximal femoral defects, the single-layer structure of titanium mesh cannot effectively fill the defect site, and it is difficult to match the shape of the femoral defect, resulting in insufficient stability, which limits its clinical application effect. Therefore, there is an urgent need for a new type of reconstructive prosthesis specifically for proximal femoral bone defects. Summary of the Invention

[0004] The purpose of the present invention is to provide a reconstructive prosthesis that matches the anatomical morphology of the proximal femoral bone defect. The reconstructive prosthesis divides the main body into functional areas by setting a metal cylinder. The inner main body is filled with bone cement to form a bone cement connector to connect and fix the hip joint prosthesis. The outer main body can be used for filling bone defects and bone tissue growth. It is used in orthopedic hip joint prosthesis revision surgery and has the advantages of good bone defect filling effect and good hip joint prosthesis fixation effect.

[0005] In the first aspect, the present invention provides a reconstruction prosthesis for a proximal femoral bone defect, the reconstruction prosthesis is used in combination with a hip joint prosthesis, the hip joint prosthesis includes a femoral stem prosthesis, a femoral head prosthesis and an acetabulum prosthesis connected in sequence, the reconstruction prosthesis is coated on one end of the femoral stem prosthesis close to the femoral head prosthesis, the reconstruction prosthesis includes: a main body, the main body is a multi-layer porous structure and has a through hole, along the extension direction of the main body, the main body includes a connecting end for inserting into the medullary cavity of the femur and matching the anatomical morphology of the proximal femoral bone defect. A filling end, wherein the shape of the through hole matches the shape of the femoral stem prosthesis and the femoral stem prosthesis is inserted into the through hole; a metal cylinder, wherein the metal cylinder is arranged inside the main body and separates the main body into an inner main body and an outer main body along the thickness direction, wherein the inner main body is arranged adjacent to the central axis of the through hole, and the outer main body is used for biological fixation with the proximal femur; a bone cement connector, wherein the bone cement connector is formed by bone cement filled in the inner main body, and is used to connect the femoral stem prosthesis and the metal cylinder and fix the femoral stem prosthesis.

[0006] In a specific embodiment, the thickness of the filling end at the outer side close to the femoral trochanter and the thickness of the filling end at the inner side away from the femoral trochanter are both positively correlated with the severity of the bone defect.

[0007] In a specific embodiment, along the thickness direction of the main body, the outer side of the filling end close to the femoral trochanter has the same thickness, and the thickness of the inner side of the filling end away from the femoral trochanter first increases and then decreases from top to bottom.

[0008] In a specific embodiment, based on the actual fact that the bone defect at the proximal femur near the trochanter is lighter than the bone defect at the proximal femur away from the trochanter, the thickness of the first side of the filling end near the trochanter is smaller than the maximum thickness of the second side of the filling end away from the trochanter.

[0009] In a specific embodiment, the minimum thickness of the filling end away from the inner side of the femoral trochanter is the same as the thickness of the filling end close to the outer side of the femoral trochanter, and the ratio of the maximum thickness of the filling end away from the inner side of the femoral trochanter to the thickness of the filling end close to the outer side of the femoral trochanter is 1.5 to 4:1.

[0010] In a specific embodiment, the main body is composed of multiple layers of connected metal meshes, wherein the inner main body is composed of multiple layers of cylindrical metal meshes, and the outer main body is composed of multiple layers of tubular metal meshes with arc-shaped protrusions.

[0011] In a specific embodiment, the metal mesh is made of titanium alloy or tantalum alloy.

[0012] In a specific embodiment, the pore size of the main body is in the range of 500 to 2000 μm, and the porosity is in the range of 50% to 90%.

[0013] In a specific embodiment, the multi-layer metal mesh on the outside of the filling end close to the femoral trochanter has a porosity and pore size that gradually increases from the center to the edge of the through hole; the multi-layer metal mesh on the inside of the filling end away from the femoral trochanter has a porosity and pore size that gradually decreases from the center to the edge of the through hole.

[0014] In a second aspect, the present invention provides a use of the reconstructive prosthesis described above in orthopedic hip prosthesis revision surgery, wherein the reconstructive prosthesis is used to fill the proximal femoral defect and stabilize the hip prosthesis, and is suitable for patients with Paprosky type II, III, and IV defects.

[0015] The beneficial effects of the present invention include at least:

[0016] 1. The reconstruction prosthesis provided by the present invention includes a main body with a through hole, a metal cylinder arranged inside the main body to separate the main body into an inner main body and an outer main body along the thickness direction, and a bone cement connector for connecting the femoral stem prosthesis inserted into the cylindrical through hole and the metal cylinder. The main body is a multi-layer porous structure. Along the extension direction of the main body, the main body includes a connecting end for inserting into the medullary cavity of the femur and a filling end that matches the anatomical morphology of the proximal femoral bone defect. On the one hand, the connecting end is inserted into the medullary cavity of the femur It is connected to the femur in the cavity, and the inner main body is filled with bone cement to form a bone cement connector to connect to the femoral stem prosthesis. In this way, the hip joint prosthesis can be well fixed to prevent loosening and displacement. On the other hand, the filling end matches the anatomical morphology of the proximal femoral bone defect, and has the characteristics of being thick on the inner side (the side of the filling end away from the femoral trochanter) and thin on the outer side (the side of the filling end close to the femoral trochanter), which is consistent with the actual situation of bone defects in patients with clinical hip joint revision, and can better fill the proximal femoral bone defect and achieve recovery and stabilization of bone structure.

[0017] 2. The reconstructive repair body provided by the present invention can be independently used to repair proximal femoral bone defects without relying on the use of a prosthesis. Although it can be used in combination with a prosthesis, its design and function can be used independently. In this way, it is convenient to use 3D printing technology for molding. At the same time, a variety of conventional models can also be designed based on the existing data of proximal femoral bone defects, which is convenient for direct selection during orthopedic surgery.

[0018] 3. The present invention can effectively limit the bone cement in the inner main body by setting a metal cylinder, and prevent it from penetrating into the outer main body, thereby avoiding bone cement waste, ensuring the precise fixation of the inner layer of bone cement, and improving the stability of the femoral stem prosthesis during revision surgery; and because the outer main body is completely not soaked by bone cement, the advantages of the porous structure are retained, which can promote the growth of bone tissue, enhance the biological fixation effect between the hip joint prosthesis and bone tissue, and achieve the dual synergistic effect of biological fixation and cement fixation.

[0019] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the proximal femur in physiological state;

[0021] Figure 2 Schematic diagram of proximal femoral bone defect under pathological conditions;

[0022] Figure 3 A schematic diagram of the three-dimensional structure of a prosthesis for reconstructing a proximal femoral bone defect provided in the first embodiment of the present invention at one angle;

[0023] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure of the reconstructed restoration from another angle. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] At present, in clinical practice, prostheses or auxiliary prostheses are usually designed with structures with consistent thickness on the inside and outside to adapt to the needs of different anatomy. In hip prostheses, if we only consider it from the prosthesis level, because the proximal femur is directly removed in the replacement surgery, although the actual situation is that the damage on the inside is more serious and the outside is lighter, it does not make much difference for the prosthesis after the proximal femur is removed in the replacement surgery. However, in the actual repair of proximal femoral bone defects, if the design of consistent thickness is continued to be used, it is easy to cause the repair material to not match the anatomical morphology, affecting the bone integration effect and repair stability. The reconstruction prosthesis provided by the present invention has the characteristics of thick inside (the side away from the femoral trochanter) and thin outside (the side close to the femoral trochanter), which matches the anatomical morphology of the proximal femoral bone defect site. In this way, the reconstruction prosthesis is consistent with the actual situation of the bone defect in patients with clinical hip revision surgery, and can better fill the proximal femoral bone defect and achieve recovery and stability of bone structure.

[0026] According to the first aspect of the present invention, there is provided a reconstruction prosthesis for a proximal femoral bone defect, wherein the reconstruction prosthesis is used in combination with a hip joint prosthesis to fill the proximal femoral defect and stabilize the hip joint prosthesis. Figure 1 and Figure 2 ,in, Figure 1 Schematic diagram of the proximal femur in physiological state. Figure 2 Schematic diagram of proximal femoral bone defect under pathological conditions.

[0027] In the present invention, the hip joint prosthesis comprises a femoral stem prosthesis, a femoral head prosthesis and an acetabulum prosthesis which are connected in sequence, and the reconstruction prosthesis is coated on one end of the femoral stem prosthesis close to the femoral head prosthesis.

[0028] See also Figure 3 and Figure 4 The reconstruction restoration 100 provided by the present invention includes a main body 10 having a through hole 10A, a metal cylinder 20 arranged inside the main body 10, and a bone cement connector. Along the thickness direction, the metal cylinder 20 separates the main body 10 into an inner main body 11a and an outer main body 12a. The femoral stem prosthesis is inserted into the through hole 10A and connected to the reconstruction restoration through the bone cement connector filled in the inner main body 11a, wherein the outer main body 12a is used for biological fixation with the proximal femur.

[0029] In the present invention, the through hole 10A is a cylindrical through hole, the shape of which matches the shape of the femoral stem prosthesis. The femoral stem prosthesis is inserted into the through hole and then connected to the reconstruction prosthesis through a bone cement connector.

[0030] In the present invention, the main body 10 is a multi-layer porous structure, consisting of multiple layers of connected metal meshes.

[0031] In an optional embodiment, the pore size of the main body is in the range of 500 to 2000 μm, and the porosity is in the range of 50% to 90%.

[0032] In an optional embodiment, the pore shape of the main body can be rectangular, honeycomb, triangular, etc.

[0033] In the present invention, the main body 10 is a multi-layer porous structure, which can promote the growth of bone tissue and reduce the stress shielding effect of metal materials.

[0034] It should be noted that, with the position of the through hole as a reference, in the present invention, the distance between the innermost metal mesh layer and the outermost metal mesh layer is the thickness of the main body 10 .

[0035] The material of the main body 10 can be commonly used clinical biomaterials such as titanium alloy or tantalum alloy to provide good biocompatibility, bone conductivity and corrosion resistance; the main body 10 can be manufactured by 3D printing technology, and the 3D printing technology includes but is not limited to melt lamination technology, three-dimensional printing rapid prototyping technology, selective laser melting technology, selective laser sintering technology or electron beam melting technology.

[0036] In an optional embodiment, the material of the main body 10 can be prepared by methods such as additive manufacturing, injection molding, machining, vapor deposition or powder sintering.

[0037] In the present invention, the metal mesh constituting the main body 10 includes a cylindrical metal mesh and a tubular metal mesh having protrusions.

[0038] In the present invention, the main body portion located on the side of the metal cylinder 20 close to the cylindrical through hole 10A is the inner main body portion 11a, and the main body portion located on the side of the metal cylinder 20 away from the cylindrical through hole 10A is the outer main body portion 11b. The inner main body portion 11a is composed of multiple layers of cylindrical metal mesh, and the outer main body portion 11b is composed of multiple layers of cylindrical metal mesh with arc-shaped protrusions.

[0039] In an optional embodiment, along the extension direction of the main body 10, the main body 10 includes a connecting end 11b for inserting into the medullary cavity of the femur and a filling end 12b that matches the anatomical morphology of the proximal femoral bone defect, and the filling end 12b is used to fill the proximal femoral bone defect.

[0040] In the present invention, the connecting end 11b is cylindrical.

[0041] In the present invention, the length of the connecting end 11b can be one or more of 20 mm, 50 mm, and 100 mm. The length of the connecting end 11b is designed based on the range of proximal femoral defects in patients with existing Paprosky type II, III, and IV defects. In this way, a series of reconstruction repair blocks with different connecting end lengths can be designed to facilitate direct selection during orthopedic surgery.

[0042] The design shape of the filling end 12b provided by the present invention matches the anatomical morphology of the proximal femur, can closely fit the femoral defect, and improve the stability of the hip joint prosthesis during revision surgery.

[0043] Along the thickness direction of the main body 10, the first side of the filling end 12b close to the femoral trochanter has the same thickness, and the thickness of the second side of the filling end 12b away from the femoral trochanter first increases and then decreases from top to bottom, that is, it has an arc-shaped convex structure.

[0044] In the present invention, the thickness of the first side of the filling end 12b close to the femoral trochanter and the thickness of the second side of the filling end 12b away from the femoral trochanter are both positively correlated with the severity of the bone defect. Based on the actual situation that the bone defect at the proximal femur close to the femoral trochanter is lighter than the bone defect at the proximal femur away from the femoral trochanter, the thickness of the first side of the filling end 12b close to the femoral trochanter is less than the maximum thickness of the second side of the filling end away from the femoral trochanter.

[0045] In an optional embodiment, the minimum thickness of the second side of the filling end 12b away from the femoral trochanter is the same as the thickness of the first side of the filling end 12b close to the femoral trochanter, and the ratio of the maximum thickness of the second side of the filling end 12b away from the femoral trochanter to the thickness of the first side of the filling end 12b close to the femoral trochanter is 1.5 to 4:1.

[0046] In the present invention, the shape and structural design of the filling end of the reconstruction repair block 100 are entirely based on clinical proximal femoral bone defects. The hip prosthesis is thicker on the inner side, away from the femoral trochanter. This is because, clinically, due to osteoporosis and the stress shielding effect of the prosthesis, the inner side (second side) of the proximal femur often has a relatively large defect, while the outer side (first side) of the proximal femur, at the greater and lesser trochanters, generally has a relatively small defect. Therefore, the reconstruction repair block prepared in the present invention is thicker on the inner side and thinner on the outer side, which can well meet actual clinical needs.

[0047] In an optional embodiment, the pore size and porosity are evenly distributed in different areas of the main body.

[0048] In an optional embodiment, the pore size and porosity are non-uniformly distributed in different areas of the main body.

[0049] In an optional embodiment, the multi-layer metal mesh on the first side of the filling end close to the femoral trochanter has a porosity and pore size that gradually increases from the center to the edge of the cylindrical through hole. In this way, the center of the filling end is hard and the edge is loose, which is suitable for repairing proximal femoral bone defects with relatively mild defects.

[0050] In an optional embodiment, the filling end is away from the multi-layer metal mesh on the second side of the femoral trochanter, and the porosity and pore size gradually decrease from the center to the edge of the cylindrical through hole. In this way, the center of the filling end is loose and the edge is hard, which can fill the bone defect site well and provide certain mechanical support, which is suitable for repairing proximal femoral bone defects with more severe defects.

[0051] For the convenience of description, Figure 4The orientation shown is based on the first side of the filling end close to the femoral trochanter as the right side, and the second side of the filling end away from the femoral trochanter as the left side. From the center of the through hole to the right, the porosity and pore size of the right side of the multi-layer metal mesh gradually increase; from the center of the through hole to the left, the porosity and pore size of the left side of the multi-layer metal mesh gradually decrease.

[0052] For ease of understanding, let's take an example and assume that the main body is formed by connecting 5 layers of metal mesh. From the center of the cylindrical through hole to the outside, there are the first metal mesh, the second metal mesh, the third metal mesh, the fourth metal mesh and the fifth metal mesh, respectively. The porosity and pore size of the first metal mesh, the second metal mesh, the third metal mesh, the fourth metal mesh and the fifth metal mesh close to the first side of the femoral trochanter (right mesh) gradually increase; the porosity and pore size of the first metal mesh, the second metal mesh, the third metal mesh, the fourth metal mesh and the fifth metal mesh away from the second side of the femoral trochanter (left mesh) gradually decrease.

[0053] In an optional embodiment, the reconstruction and repair block 100 further includes a functional modification layer provided on the surface of the main body 10 .

[0054] In the present invention, the functionalized modification layer is used to enhance bone regeneration and prosthesis fixation effects.

[0055] In the present invention, the functionalized modification layer is a coating or is obtained by a surface treatment method, wherein the surface treatment method includes but is not limited to sandblasting, anodizing, micro-arc oxidation or pickling.

[0056] In the present invention, the central axis of the metal cylinder 20 coincides with the hole centerline of the cylindrical through hole 10A.

[0057] In the present invention, the function of the metal cylinder 20 is to separate the main body into two non-connected parts, thereby playing the role of functional zoning and enhancing structural stability. The inner main body 11a is filled with bone cement to form a bone cement connector to connect the hip joint prosthesis and the metal cylinder 20. The outer main body 12a maintains a porous structure and can be used for filling bone defects and bone tissue growth.

[0058] In traditional revision surgery, the fixation of the femoral stem prosthesis is usually done by directly filling it with bone cement. If the entire structure is porous, it is easy for bone cement to penetrate into the outer layer when fixed with bone cement, resulting in an increase in the amount of bone cement used, unsatisfactory fixation effect, and possibly affecting the ingrowth of bone tissue. The present invention, by providing a metal cylinder 20, can effectively limit the bone cement in the inner main body portion 11a and prevent it from penetrating into the outer main body portion 12a, thereby avoiding waste of bone cement and ensuring the precise fixation of the inner layer of bone cement, thereby improving the stability of the prosthetic stem during revision surgery. Since the outer main body portion 12a is completely not soaked with bone cement, the advantages of the porous structure are retained, which can promote the ingrowth of bone tissue, enhance the biological fixation effect between the femoral stem prosthesis and bone tissue, and achieve the dual synergistic effect of biological fixation and cement fixation.

[0059] In the present invention, the bone cement connector is formed by bone cement filled in the inner body portion 11 a and is used to connect the femoral stem prosthesis and the metal cylinder 20 and fix the femoral stem prosthesis.

[0060] According to a second aspect of the present invention, the present invention also provides the use of the reconstruction repair block described above in orthopedic hip prosthesis revision surgery, which is suitable for patients with Paprosky type II, III, and IV defects.

[0061] Patients with Paprosky type II, III, and IV defects often have severe bone defects, making it difficult to fix the hip prosthesis in the proximal femur. The design shape of the reconstruction prosthesis provided by the present invention matches the anatomical morphology of the proximal femur, and the connecting end is inserted into the medullary cavity of the femur to form a connection. In this way, it can not only effectively fill the bone defect in the proximal femur, but also effectively fix the hip prosthesis to prevent loosening and displacement.

[0062] According to a third aspect of the present invention, the present invention further provides use of the above-mentioned reconstruction repair block in orthopedic surgery for proximal femoral bone defects.

[0063] The reconstructive repair body provided by the present invention can be independently used to repair proximal femoral bone defects without relying on the use of a prosthesis. Although it can be used in combination with a prosthesis, its design and function can be used independently. In this way, it is convenient to use 3D printing technology for molding. At the same time, a variety of conventional models can also be designed based on the existing data of proximal femoral bone defects, which is convenient for direct selection during orthopedic surgery.

[0064] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, several simple deductions and substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the scope of protection of the present invention.

Claims

1. A reconstruction prosthesis for a proximal femoral bone defect, wherein the reconstruction prosthesis is used in combination with a hip joint prosthesis, wherein the hip joint prosthesis comprises a femoral stem prosthesis, a femoral head prosthesis, and an acetabulum prosthesis connected in sequence, wherein the reconstruction prosthesis is covered on one end of the femoral stem prosthesis near the femoral head prosthesis, and wherein: The reconstructive restoration comprises: A main body portion, the main body portion having a multi-layer porous structure and a through hole, and along the extension direction of the main body portion, the main body portion includes a connecting end for insertion into the medullary cavity of the femur and a filling end that matches the anatomical morphology of the proximal femoral bone defect, wherein the shape of the through hole matches the shape of the femoral stem prosthesis, and the femoral stem prosthesis is inserted into the through hole; a metal cylinder disposed inside the main body portion and dividing the main body portion into an inner main body portion and an outer main body portion along a thickness direction, wherein the inner main body portion is disposed adjacent to a central axis of the through hole, and the outer main body portion is used for biological fixation to the proximal femur; A bone cement connector is formed by bone cement filled in the inner main body portion and is used to connect the femoral stem prosthesis and the metal cylinder and fix the femoral stem prosthesis.

2. The reconstruction prosthesis for proximal femoral bone defect according to claim 1, characterized in that: The thickness of the first side of the filling end close to the femoral trochanter and the thickness of the second side of the filling end away from the femoral trochanter are both positively correlated with the severity of the bone defect.

3. The reconstruction prosthesis for proximal femoral bone defect according to claim 2, characterized in that: Along the thickness direction of the main body, the first side of the filling end close to the femoral trochanter has the same thickness, and the thickness of the second side of the filling end away from the femoral trochanter first increases and then decreases from top to bottom.

4. The reconstruction prosthesis for proximal femoral bone defect according to claim 3, characterized in that: Based on the actual situation that the bone defect at the proximal femur near the trochanter is lighter than the bone defect at the proximal femur away from the trochanter, the thickness of the first side of the filling end near the trochanter is smaller than the maximum thickness of the second side of the filling end away from the trochanter.

5. The reconstruction prosthesis for proximal femoral bone defect according to claim 4, characterized in that: The minimum thickness of the second side of the filling end away from the femoral trochanter is the same as the thickness of the first side of the filling end close to the femoral trochanter, and the ratio of the maximum thickness of the second side of the filling end away from the femoral trochanter to the thickness of the first side of the filling end close to the femoral trochanter is 1.5 to 4:

1.

6. The reconstruction prosthesis for proximal femoral bone defect according to claim 5, characterized in that: The main body is composed of multiple layers of connected metal meshes. The inner main body is composed of multiple layers of cylindrical metal meshes, and the outer main body is composed of multiple layers of tubular metal meshes with arc-shaped protrusions.

7. The reconstruction prosthesis for proximal femoral bone defect according to claim 6, characterized in that: The metal mesh is made of titanium alloy or tantalum alloy.

8. The reconstruction prosthesis for proximal femoral bone defect according to claim 6 or 7, characterized in that: The pore size of the main body is in the range of 500 to 2000 μm, and the porosity is in the range of 50% to 90%.

9. The reconstruction prosthesis for proximal femoral bone defect according to claim 8, characterized in that: The multilayer metal mesh on the first side of the filling end close to the femoral trochanter has a porosity and pore size that gradually increases from the center to the edge of the through hole; the multilayer metal mesh on the second side of the filling end away from the femoral trochanter has a porosity and pore size that gradually decreases from the center to the edge of the through hole.

10. Use of the reconstruction prosthesis according to claims 1 to 9 in orthopedic hip joint prosthesis revision surgery, characterized in that: The reconstructive prosthesis is used to fill the proximal femoral defect and stabilize the hip joint prosthesis, and is suitable for patients with Paprosky type II, III, and IV defects.

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