Acetabulum repair prosthesis

Abstract

The invention provides an acetabulum repair prosthesis, which relates to the technical field of medical instruments and comprises an articular surface prosthesis and a plurality of conduction columns, the articular surface prosthesis is semilunar; an outer spherical surface is arranged on one side of the articular surface prosthesis, the outer spherical surface is attached to the cancellous bone of the acetabulum needing to be repaired, and the articular surface prosthesis is in contact with the cancellous bone of the acetabulum needing to be repaired through the outer spherical surface to form a bone interface; an inner spherical surface is arranged on the other side of the articular surface prosthesis, the inner spherical surface is in spherical sliding fit with the femoral head or the femoral head replacement prosthesis, and the articular surface prosthesis is matched with the femoral head or the femoral head replacement prosthesis through the inner spherical surface to form a ball-and-socket joint; a plurality of conduction columns are arranged on one side of the outer spherical surface of the articular surface prosthesis, and the conduction columns are inserted into drill holes in the acetabular cancellous bone needing to be repaired and used for positioning the articular surface prosthesis. The articular surface prosthesis similar to the acetabulum meniscus in shape is used for locally replacing the articular surface of the acetabulum, few sclerotin is removed, excessive treatment is avoided, and meanwhile the opportunity of conservative treatment is reserved for a patient.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to an acetabulum repair prosthesis. Background Art

[0002] At present, with the development of the economy, the number of artificial hip replacement surgeries has increased year by year. However, total hip replacement is currently the main surgical method for treating acetabular side injuries or lesions. This method is to completely file the acetabular cartilage and bone, file away all the cartilage, and evenly bleed the cancellous bone of the acetabular fossa, then implant the acetabular prosthesis and screws to complete the total hip replacement. However, some patients only have a small amount of damage or lesions to the acetabular cartilage or bone, and do not involve the entire acetabular bone and medullary cavity. At present, there is no special treatment method and prosthesis for this type of disease. It is still a total hip replacement. Although it can be treated, the acetabulum and femoral medullary cavity are both filed and expanded, which is traumatic and removes a lot of bone. It can be considered an over-treatment operation, and the patient also loses the opportunity for conservative treatment.

[0003] Currently, hip preservation surgery mainly involves two aspects: One is periacetabular osteotomy (PAO) for children or adolescents with developmental dysplasia of the hip (DDH), which is mainly to improve the structural characteristics of the acetabulum such as abduction angle and anteversion angle, and to increase the coverage of the acetabulum on the femoral head, thereby eliminating the deformity. This procedure mainly involves osteotomy around the acetabulum, and does not repair or correct the inside of the acetabulum.

[0004] The other is the early treatment of femoral head necrosis (ARCO stage I or II), which aims to restore the blood flow, pressure and other indicators inside the femoral head, restore the bone activity inside the femoral head, and eliminate femoral head necrosis. This procedure involves the femoral head and does not repair or correct the inside of the acetabulum.

[0005] Therefore, there is an urgent need to design an acetabular repair prosthesis, which is mainly used to repair acetabular cartilage and bone damage or lesions, and provide patients and doctors with a minimally invasive treatment prosthesis to preserve the patient's bone mass and reduce the patient's pain. Summary of the invention

[0006] The object of the present invention is to provide an acetabular repair prosthesis to solve at least one of the above-mentioned technical problems existing in the prior art.

[0007] In order to solve the above technical problems, the present invention provides an acetabular repair prosthesis, comprising: an articular surface prosthesis and a plurality of conductive columns; The articular surface prosthesis is semilunar in shape, similar to the acetabular meniscus (i.e., the articular surface of the acetabulum), and can better reconstruct the acetabular structure; One side of the articular surface prosthesis is provided with an outer spherical surface, and the outer spherical surface can fit with the cancellous bone of the acetabulum to be repaired. The articular surface prosthesis contacts and fits with the cancellous bone of the acetabulum to be repaired through the outer spherical surface to form a permanent and stable bone interface; The other side of the articular surface prosthesis is provided with an inner spherical surface, and the inner spherical surface can realize spherical sliding cooperation with the physiological femoral head or the femoral head replacement prosthesis, and the articular surface prosthesis cooperates with the physiological femoral head or the femoral head replacement prosthesis through the inner spherical surface to form a ball-and-socket joint; The articular surface prosthesis is provided with a plurality of conductive posts on one side of the outer spherical surface, and the conductive posts are inserted into the drilled holes on the cancellous bone of the acetabulum to be repaired, and are used for positioning the articular surface prosthesis. At the same time, the anti-rotation stability of the acetabulum repair prosthesis can be improved by positioning the plurality of conductive posts. During use, the surgeon only needs to file off the articular surface cartilage of the acetabulum to be repaired and a small amount of damaged or diseased bone under the articular surface cartilage; after the cancellous bone under the articular surface cartilage has evenly seeped blood, drill several holes in the cancellous bone of the acetabulum to be repaired, the shape and size of the holes are similar to the shape and size of the conduction columns, and insert several of the conduction columns into the corresponding holes; fit the outer spherical surface to the cancellous bone of the acetabulum to be repaired, usually fixed by biological fixation, of course, it can also be assisted by bone cement, screws, etc., thereby achieving local replacement of the articular surface of the acetabulum.

[0008] The present application uses an articular surface prosthesis shaped like the lunate surface of the acetabulum to perform partial replacement of the articular surface of the acetabulum. There is no need to file away all the cartilage on the surface of the acetabulum and part of the healthy bone. Only the articular surface cartilage of the acetabulum to be repaired and a small amount of damaged or diseased bone under the articular surface cartilage need to be filed away. Less bone is removed, the trauma is less, overtreatment is avoided, the patient's pain is alleviated, and at the same time, the opportunity for conservative treatment is reserved for the patient to a certain extent.

[0009] Furthermore, the articular surface prosthesis is provided with a plurality of hole structures, and the hole structures are arranged on the outer spherical surface, so that the bone of the acetabulum grows into the hole structures, which is beneficial to the long-term biological fixation of the bone of the acetabulum and the articular surface prosthesis, and at the same time reduces the elastic modulus of the articular surface prosthesis, so that the articular surface prosthesis is closer to the articular surface cartilage, thereby improving the bionic performance of the articular surface prosthesis.

[0010] Optionally, the hole structure may be a through hole, one end of which passes through the outer spherical surface and the other end of which passes through the inner spherical surface, thereby increasing the connectivity between the outer spherical surface and the inner spherical surface and reducing the elastic modulus of the articular surface prosthesis, making the articular surface prosthesis closer to the articular surface cartilage and improving the bionic performance of the articular surface prosthesis.

[0011] Preferably, the hole structure passes through the articular surface prosthesis along the thickness direction of the articular surface prosthesis.

[0012] Preferably, the hole structure can be a stepped through hole, the hole diameter of the hole structure on the outer spherical surface side is larger, and the hole diameter of the hole structure on the inner spherical surface side is smaller, thereby reducing the shear effect on the articular surface cartilage or bone interface of the physiological femoral head and reducing the wear rate.

[0013] Preferably, the edge of the hole structure on the inner spherical surface side is chamfered to prevent the edge of the hole structure on the inner spherical surface side from wearing the articular surface cartilage of the physiological femoral head or the femoral head replacement prosthesis.

[0014] Of course, the hole structure may also be a blind hole, and the hole structure does not penetrate the joint surface prosthesis; The outer spherical surface is provided with the hole structure; The inner spherical surface is a smooth solid surface without the hole structure.

[0015] Optionally, the conductive column is also provided with a plurality of the hole structures, which are blind holes, and are provided on the surface of the conductive column for the bone of the acetabulum to grow into the hole structures; Alternatively, a plurality of the hole structures are provided on the surface and inside of the conductive column, and the hole structures can be interconnected, so that the conductive column as a whole forms a porous structure, which is used for the bone of the acetabulum to grow into the porous structure, and is conducive to the long-term biological fixation of the bone of the acetabulum and the articular surface prosthesis; Of course, the hole structure may not be provided on the conductive column to avoid affecting the mechanical properties of the conductive column.

[0016] Furthermore, the axis of the conduction column is arranged to point to the sacroiliac joint. Since the sacroiliac joint is a load-bearing joint, the shear stress is usually transmitted from the sacroiliac joint to the acetabulum. The conduction column is arranged parallel to the conduction direction of the shear stress, and the torque of the shear stress is zero, so that there is no shear stress between the conduction column and the joint surface prosthesis. Therefore, the axis of the conduction column is arranged to point to the sacroiliac joint to eliminate the shear stress and optimize the mechanical conduction of the acetabulum repair prosthesis.

[0017] Furthermore, the conductive post is conical, and one end of the conductive post connected to the acetabular repair prosthesis is larger in size, so as to prevent the acetabular repair prosthesis from sinking into the acetabulum.

[0018] Optionally, the conductive post is integrally connected to the joint surface prosthesis; Of course, the conductive column can also be detachably mounted on the joint surface prosthesis, and the conductive column can be connected to the joint surface prosthesis by means of threading, bonding or clamping.

[0019] Furthermore, a biological coating is coated on the surface of the outer spherical surface in the area where the hole structure is not provided, or a biological coating is coated on the surface of both the outer spherical surface and the conductive column in the area where the hole structure is not provided, so that the bone of the acetabulum grows into the biological coating. The biological coating has a bone-inducing effect and can quickly achieve bone integration, which is beneficial to the long-term biological fixation of the acetabulum bone and the articular surface prosthesis.

[0020] Furthermore, the acetabulum repair prosthesis is made of polymer material or polymer composite material.

[0021] Preferably, the acetabular repair prosthesis is made of a soft polymer material or a soft polymer composite material; The base material or the soft polymer material of the soft polymer composite material may be polyethylene, polyetheretherketone (PEEK), or the like.

[0022] Preferably, the acetabular repair prosthesis is made of carbon fiber reinforced polyetheretherketone (CFR-PEEK) composite material; The matrix material is polyetheretherketone and the reinforcement material is carbon fiber.

[0023] Preferably, the porosity of the acetabular repair prosthesis is 50% to 80%.

[0024] Preferably, the pore structure has a pore diameter of 350 μm to 700 μm.

[0025] By adopting the above technical solution, the present invention has the following beneficial effects: The acetabulum repair prosthesis provided by the present invention uses an articular surface prosthesis shaped like the lunate surface of the acetabulum to perform partial replacement of the articular surface of the acetabulum. There is no need to scrape away all the cartilage on the surface of the acetabulum and part of the healthy bone. Only the articular surface cartilage of the acetabulum to be repaired and a small amount of damaged or diseased bone under the articular surface cartilage need to be scraped away. Less bone is removed, less trauma is caused, overtreatment is avoided, and the patient's pain is alleviated. At the same time, the patient is given the opportunity for conservative treatment to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of an acetabulum repair prosthesis provided by an embodiment of the present invention; Figure 2 for Figure 1The schematic diagram of the structure of the acetabular repair prosthesis on the inner spherical surface side is shown; Figure 3 for Figure 1 The schematic diagram of the structure of the acetabular repair prosthesis on the outer spherical surface side is shown; Figure 4 for Figure 1 A cross-sectional view of the hole structure shown; Figure 5 A schematic front view of the structure of the acetabulum repair prosthesis provided by an embodiment of the present invention installed in the acetabulum; Figure 6 for Figure 5 The acetabular repair prosthesis shown is installed in the acetabulum in a side view.

[0028] Reference numerals: 1-articular surface prosthesis; 11-external spherical surface; 12-inner spherical surface; 2-conductive column; 3-hole structure; 31-rounded corner. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The present invention is further explained below in conjunction with specific implementation modes.

[0033] It should also be noted that the following specific embodiments or specific implementations are a series of optimized settings listed in the present invention to further explain the specific content of the invention, and these settings can be used in combination or in association with each other.

[0034] Example 1 like Figure 1-6 As shown, an acetabulum repair prosthesis provided in this embodiment includes: an articular surface prosthesis 1 and a plurality of conductive columns 2; the articular surface prosthesis 1 is semilunar in shape, similar to the acetabulum meniscus (i.e., the articular surface of the acetabulum), and can better reconstruct the acetabulum structure; the acetabulum is located in the center of the lateral surface of the hip bone, is hemispherical and deeply concave, has a diameter of about 30-50 mm, and is covered with a transparent articular surface cartilage of about 2 mm thick, which is distributed in a semilunar shape; an outer spherical surface 11 is provided on one side of the articular surface prosthesis 1, and the outer spherical surface 11 can fit with the cancellous bone of the acetabulum to be repaired, and the articular surface prosthesis 1 contacts the cancellous bone of the acetabulum to be repaired through the outer spherical surface 11. The joint surface prosthesis 1 is fitted to form a permanent and stable bone interface; the other side of the joint surface prosthesis 1 is provided with an inner spherical surface 12, and the inner spherical surface 12 can realize spherical sliding cooperation with the physiological femoral head or the femoral head replacement prosthesis, and the joint surface prosthesis 1 cooperates with the physiological femoral head or the femoral head replacement prosthesis through the inner spherical surface 12 to form a ball-and-socket joint; the joint surface prosthesis 1 is provided with a plurality of conductive posts 2 on one side of the outer spherical surface 11, and the conductive posts 2 are inserted into the drilled holes on the cancellous bone of the acetabulum to be repaired, and are used for positioning the joint surface prosthesis 1, and the anti-rotation stability of the acetabulum repair prosthesis can be improved by positioning with a plurality of conductive posts 2; Before use, the patient's hip joint to be repaired needs to be scanned to generate a three-dimensional model of the patient's hip joint; the hip joint is composed of a femoral head and an acetabulum, and the spherical diameters of the patient's acetabulum to be repaired and the physiological femoral head or a femoral head replacement prosthesis are obtained from the three-dimensional model, and then the acetabulum repair prosthesis with matching spherical diameters is selected to ensure that the spherical diameter of the outer spherical surface 11 of the acetabulum repair prosthesis matches the spherical diameter of the cancellous bone of the acetabulum to be repaired, so that the outer spherical surface 11 can be fitted with the cancellous bone of the acetabulum to be repaired, and the spherical diameter of the inner spherical surface 12 of the acetabulum repair prosthesis is ensured to match the spherical diameter of the physiological femoral head or a femoral head replacement prosthesis. The spherical diameter of the physiological femoral head or the femoral head replacement prosthesis is matched, so that the inner spherical surface 12 can be slidably matched with the spherical surface of the physiological femoral head or the femoral head replacement prosthesis; those skilled in the art know that the above-mentioned method of scanning and detecting the acetabulum and the physiological femoral head can be achieved by adopting conventional schemes in the prior art (such as CT scanning, magnetic resonance imaging scanning, X-ray scanning, etc.), which belongs to the common knowledge in the art. This part of the scanning detection method and the three-dimensional model generation method do not belong to the invention point of this scheme, nor are they within the protection scope of this scheme; During use, the operator only needs to file away the articular surface cartilage of the acetabulum to be repaired and a small amount of damaged or diseased bone under the articular surface cartilage, and at the same time, ensure that the ball diameter of the acetabulum after filing is almost the same as the ball diameter of the outer spherical surface 11; after the cancellous bone under the articular surface cartilage is evenly bled, drill a number of holes in the cancellous bone of the acetabulum to be repaired, the shape and size of the holes are similar to the shape and size of the conductive columns, and insert a number of the conductive columns 2 into the corresponding holes; fit the outer spherical surface 11 to the cancellous bone of the acetabulum to be repaired, usually fixed by biological fixation, of course, it can also be assisted by bone cement, screws, etc., thereby achieving local replacement of the articular surface of the acetabulum.

[0035] The present application uses an articular surface prosthesis 1 shaped like the lunate surface of the acetabulum to perform partial replacement of the articular surface of the acetabulum. There is no need to file away all the cartilage on the surface of the acetabulum and part of the healthy bone. Only the articular surface cartilage of the acetabulum to be repaired and a small amount of damaged or diseased bone under the articular surface cartilage need to be file away. Less bone is removed, less trauma is caused, overtreatment is avoided, and patient pain is alleviated. At the same time, the opportunity for conservative treatment is reserved for patients to a certain extent.

[0036] Reference Figure 3 As shown, on the basis of the above technical solution, it is further preferred that a plurality of hole structures 3 are provided on the articular surface prosthesis 1, and the hole structure 3 is provided on the outer spherical surface 11, so that the cancellous bone of the acetabulum can grow into the hole structure 3, which is beneficial to the long-term biological fixation of the acetabulum bone and the articular surface prosthesis 1, and at the same time reduces the elastic modulus of the articular surface prosthesis 1, so that the articular surface prosthesis 1 is closer to the articular surface cartilage, thereby improving the bionic performance of the articular surface prosthesis 1.

[0037] Reference Figure 4 As shown, in this embodiment, the hole structure 3 is a through hole, one end of the hole structure 3 passes through the outer spherical surface 11, and the other end passes through the inner spherical surface 12, which increases the connectivity between the outer spherical surface 11 and the inner spherical surface 12, and at the same time reduces the elastic modulus of the articular surface prosthesis 1, so that the articular surface prosthesis 1 is closer to the articular surface cartilage, thereby improving the bionic performance of the articular surface prosthesis 1.

[0038] More preferably, the hole structure 3 penetrates the articular surface prosthesis 1 along the thickness direction of the articular surface prosthesis 1 .

[0039] Reference Figure 4 As shown, in this embodiment, the hole structure 3 is a stepped through hole, the hole diameter of the hole structure 3 on the side of the outer spherical surface 11 is larger, and the hole diameter of the hole structure 3 on the side of the inner spherical surface 12 is smaller, which reduces the shear effect of the articular surface cartilage or bone interface of the physiological femoral head and reduces the wear rate.

[0040] More preferably, the edge of the hole structure 3 on the side of the inner spherical surface 12 is processed with a chamfer 31 to prevent the edge of the hole structure 3 on the side of the inner spherical surface 12 from wearing the articular surface cartilage of the physiological femoral head or the femoral head replacement prosthesis; the larger the chamfer 31, the smoother the transition of the edge of the hole structure 3 on the side of the inner spherical surface 12, thereby reducing the probability of stress concentration.

[0041] Reference Figure 1 , Figure 2 As shown, in this embodiment, the hole structure 3 is not provided on the side area of ​​the inner spherical surface 12 away from the conductive pillar 2; and the hole structure 3 is not provided on the conductive pillar 2 to avoid reducing the mechanical properties of the conductive pillar 2.

[0042] Reference Figure 5 , Figure 6 As shown, further, the axis of the conduction column 2 is arranged to point to the sacroiliac joint. Since the sacroiliac joint is a load-bearing joint, the shear stress is usually transmitted from the sacroiliac joint to the acetabulum. The conduction column 2 is arranged parallel to the conduction direction of the shear stress, and the torque of the shear stress is zero, so that there is no shear stress between the conduction column 2 and the joint surface prosthesis 1. Therefore, the arrangement of the axis of the conduction column 2 to point to the sacroiliac joint can eliminate the shear stress and optimize the mechanical conduction of the acetabulum repair prosthesis.

[0043] More preferably, the conductive post 2 is conical, and one end of the conductive post 2 connected to the acetabular repair prosthesis is larger in size to prevent the acetabular repair prosthesis from sinking into the acetabulum.

[0044] In this embodiment, the conductive column 2 is integrally connected to the articular surface prosthesis 1; of course, the conductive column 2 can also be detachably installed on the articular surface prosthesis 1, and the conductive column 2 can be connected to the articular surface prosthesis 1 by means of threads, bonding or clamping.

[0045] Furthermore, the acetabulum repair prosthesis is made of polymer material or polymer composite material.

[0046] More preferably, the acetabular repair prosthesis is made of a soft polymer material or a soft polymer composite material; wherein, the matrix material or the soft polymer material of the soft polymer composite material can be polyethylene, polyetheretherketone (PEEK), etc.; the number of the hole structures 3 is set differently according to the different preparation materials, and the reduction of the elastic modulus of a region of the acetabular repair prosthesis is adjusted by setting the proportion of the hole structure 3 in the region, so as to ensure the strength of the acetabular repair prosthesis while achieving a balance between the mechanical properties and the elastic modulus of the acetabular repair prosthesis. The present invention adopts an articular surface prosthesis 1 shaped like the lunar surface of the acetabulum to perform local replacement of the articular surface of the acetabulum. There is no need to scrape off all the cartilage and part of the healthy bone on the surface of the acetabulum. Only the articular surface cartilage of the acetabulum to be repaired and a small amount of damaged or diseased bone under the articular surface cartilage need to be scraped off. Less bone is removed, less trauma is caused, overtreatment is avoided, and the patient's pain is alleviated. At the same time, the patient is given the opportunity of conservative treatment to a certain extent. Biological fixation is performed by arranging a plurality of through holes on the articular surface prosthesis 1. The bone of the acetabulum can grow into the through holes, which is beneficial to the long-term biological fixation of the bone of the acetabulum and the acetabular repair prosthesis. At the same time, the elastic modulus of the articular surface prosthesis 1 is reduced, so that the articular surface prosthesis 1 is closer to the articular surface cartilage, and the bionic performance of the articular surface prosthesis 1 is improved.

[0047] Example 2 This embodiment is basically the same as Embodiment 1, except that: The present embodiment provides an acetabulum repair prosthesis, wherein the surface of the outer spherical surface in the area where the hole structure 3 is not provided is coated with a biological coating, or the surface of the outer spherical surface in the area where the hole structure 3 is not provided and the surface of the conductive column 2 are both coated with a biological coating, so that the cancellous bone of the acetabulum can grow into the biological coating, and the biological coating has a bone-inducing effect, which can quickly achieve bone integration, and is beneficial to the long-term biological fixation of the acetabulum bone and the articular surface prosthesis.

[0048] Example 3 The present embodiment provides an acetabulum repair prosthesis, comprising: an articular surface prosthesis 1 and a plurality of conductive columns 2; the articular surface prosthesis 1 is semilunar in shape, similar to the acetabulum meniscus (i.e., the articular surface of the acetabulum), and can better reconstruct the acetabulum structure; the acetabulum is located in the center of the lateral surface of the hip bone, is hemispherical and deeply concave, has a diameter of about 30 to 50 mm, and is covered with transparent articular cartilage about 2 mm thick, which is distributed in a semilunar shape; an outer spherical surface 11 is provided on one side of the articular surface prosthesis 1, and the outer spherical surface 11 can be fitted with the cancellous bone of the acetabulum to be repaired, and the articular surface prosthesis 1 is in contact with the cancellous bone of the acetabulum to be repaired through the outer spherical surface 11. A permanent and stable bone interface is formed; an inner spherical surface 12 is provided on the other side of the articular surface prosthesis 1, and the inner spherical surface 12 can realize spherical sliding cooperation with the physiological femoral head or the femoral head replacement prosthesis, and the articular surface prosthesis 1 cooperates with the physiological femoral head or the femoral head replacement prosthesis through the inner spherical surface 12 to form a ball-and-socket joint; the articular surface prosthesis 1 is provided with a plurality of conductive posts 2 on one side of the outer spherical surface 11, and the conductive posts 2 are inserted into the drilled holes on the cancellous bone of the acetabulum to be repaired, and are used for positioning the articular surface prosthesis 1, and the anti-rotation stability of the acetabulum repair prosthesis can be improved by positioning with a plurality of conductive posts 2; Before use, the patient's hip joint to be repaired needs to be scanned to generate a three-dimensional model of the patient's hip joint; the hip joint is composed of a femoral head and an acetabulum, and the spherical diameters of the patient's acetabulum to be repaired and the physiological femoral head or a femoral head replacement prosthesis are obtained from the three-dimensional model, and then the acetabulum repair prosthesis with matching spherical diameters is selected to ensure that the spherical diameter of the outer spherical surface 11 of the acetabulum repair prosthesis matches the spherical diameter of the cancellous bone of the acetabulum to be repaired, so that the outer spherical surface 11 can be fitted with the cancellous bone of the acetabulum to be repaired, and the spherical diameter of the inner spherical surface 12 of the acetabulum repair prosthesis is ensured to match the spherical diameter of the physiological femoral head or a femoral head replacement prosthesis. The spherical diameter of the physiological femoral head or the femoral head replacement prosthesis is matched, so that the inner spherical surface 12 can be slidably matched with the spherical surface of the physiological femoral head or the femoral head replacement prosthesis; those skilled in the art know that the above-mentioned method of scanning and detecting the acetabulum and the physiological femoral head can be achieved by adopting conventional schemes in the prior art (such as CT scanning, magnetic resonance imaging scanning, X-ray scanning, etc.), which belongs to the common knowledge in the art. This part of the scanning detection method and the three-dimensional model generation method do not belong to the invention point of this scheme, nor are they within the protection scope of this scheme; During use, the operator only needs to file away the articular surface cartilage of the acetabulum to be repaired and a small amount of damaged or diseased bone under the articular surface cartilage, and at the same time, ensure that the ball diameter of the acetabulum after filing is almost the same as the ball diameter of the outer spherical surface 11; after the cancellous bone under the articular surface cartilage is evenly bled, drill a number of holes in the cancellous bone of the acetabulum to be repaired, the shape and size of the holes are similar to the shape and size of the conductive columns, and insert a number of the conductive columns 2 into the corresponding holes; fit the outer spherical surface 11 to the cancellous bone of the acetabulum to be repaired, usually fixed by biological fixation, of course, it can also be assisted by bone cement, screws, etc., thereby achieving local replacement of the articular surface of the acetabulum.

[0049] The present application uses an articular surface prosthesis 1 shaped like the lunate surface of the acetabulum to perform partial replacement of the articular surface of the acetabulum. There is no need to file away all the cartilage on the surface of the acetabulum and part of the healthy bone. Only the articular surface cartilage of the acetabulum to be repaired and a small amount of damaged or diseased bone under the articular surface cartilage need to be file away. Less bone is removed, less trauma is caused, overtreatment is avoided, and patient pain is alleviated. At the same time, the opportunity for conservative treatment is reserved for patients to a certain extent.

[0050] On the basis of the above technical solution, it is further preferred that a plurality of hole structures 3 are provided on the articular surface prosthesis 1, and the hole structure 3 is provided on the outer spherical surface 11, so that the cancellous bone of the acetabulum can grow into the hole structure 3, which is beneficial to the long-term biological fixation of the acetabulum bone and the articular surface prosthesis 1, and at the same time reduces the elastic modulus of the articular surface prosthesis 1, so that the articular surface prosthesis 1 is closer to the articular surface cartilage, thereby improving the bionic performance of the articular surface prosthesis 1.

[0051] The hole structure is a blind hole and does not penetrate the joint surface prosthesis; the hole structure is provided on the outer spherical surface; and the inner spherical surface is a smooth solid surface and is not provided with the hole structure.

[0052] In this embodiment, the conductive column is also provided with a plurality of hole structures, which are arranged on the surface of the conductive column for the acetabulum bone to grow into the hole structure, which is beneficial to the long-term biological fixation of the acetabulum bone and the articular surface prosthesis.

[0053] Furthermore, the axis of the conduction column 2 is arranged to point to the sacroiliac joint. Since the sacroiliac joint is a load-bearing joint, the shear stress is usually transmitted from the sacroiliac joint to the acetabulum. The conduction column 2 is arranged parallel to the conduction direction of the shear stress, and the torque of the shear stress is zero, so that there is no shear stress between the conduction column 2 and the joint surface prosthesis 1. Therefore, the arrangement of the axis of the conduction column 2 to point to the sacroiliac joint can eliminate the shear stress and optimize the mechanical conduction of the acetabulum repair prosthesis.

[0054] More preferably, the conductive post 2 is conical, and one end of the conductive post 2 connected to the acetabular repair prosthesis is larger in size to prevent the acetabular repair prosthesis from sinking into the acetabulum.

[0055] In this embodiment, the conductive column 2 is integrally connected to the articular surface prosthesis 1; of course, the conductive column 2 can also be detachably installed on the articular surface prosthesis 1, and the conductive column 2 can be connected to the articular surface prosthesis 1 by means of threads, bonding or clamping.

[0056] Furthermore, the acetabulum repair prosthesis is made of polymer material or polymer composite material.

[0057] More preferably, the acetabular repair prosthesis is made of a soft polymer material or a soft polymer composite material; wherein, the matrix material or the soft polymer material of the soft polymer composite material can be polyethylene, polyetheretherketone (PEEK), etc.; the number of the hole structures 3 is set differently according to the different preparation materials, and the reduction of the elastic modulus of a region of the acetabular repair prosthesis is adjusted by setting the proportion of the hole structure 3 in the region, so as to ensure the strength of the acetabular repair prosthesis while achieving a balance between the mechanical properties and the elastic modulus of the acetabular repair prosthesis.

[0058] In this embodiment, the acetabular repair prosthesis is made of a carbon fiber reinforced polyetheretherketone (CFR-PEEK) composite material; wherein the matrix material is polyetheretherketone and the reinforcement material is carbon fiber.

[0059] In this embodiment, the porosity of the acetabulum repair prosthesis is 50% to 80%.

[0060] And, the pore size of the pore structure is 350 μm to 700 μm.

[0061] The present invention adopts an articular surface prosthesis 1 shaped like the lunar surface of the acetabulum to perform local replacement of the articular surface of the acetabulum. There is no need to scrape off all the cartilage and part of the healthy bone on the surface of the acetabulum. Only the articular surface cartilage of the acetabulum to be repaired and a small amount of damaged or diseased bone under the articular surface cartilage need to be scraped off. Less bone is removed, less trauma is caused, overtreatment is avoided, and the patient's pain is alleviated. At the same time, the patient is given the opportunity of conservative treatment to a certain extent. Biological fixation is performed by arranging blind holes on the outer spherical surface and the conductive column of the articular surface prosthesis 1. The bone of the acetabulum can grow into the blind holes, which is beneficial to the long-term biological fixation of the bone of the acetabulum and the acetabular repair prosthesis. At the same time, the elastic modulus of the articular surface prosthesis 1 is reduced, so that the articular surface prosthesis 1 is closer to the articular surface cartilage, and the bionic performance of the articular surface prosthesis 1 is improved.

[0062] Example 4 This embodiment is basically the same as Embodiment 3, except that: The present embodiment provides an acetabular repair prosthesis, in which a plurality of hole structures are provided on the surface and inside of the conductive column, and the hole structures can be interconnected, so that the conductive column as a whole forms a porous structure, which is used for the cancellous bone of the acetabulum to grow into the porous structure, and is beneficial to the long-term biological fixation of the acetabular bone and the articular surface prosthesis.

[0063] Example 5 This embodiment is basically the same as Embodiment 3, except that: The present embodiment provides an acetabulum repair prosthesis, wherein the surface of the outer spherical surface in the area where the hole structure 3 is not provided is coated with a biological coating, or the surface of the outer spherical surface and the surface of the conductive column 2 in the area where the hole structure 3 is not provided are coated with a biological coating, so that the cancellous bone of the acetabulum can grow into the biological coating, and the biological coating has a bone-inducing effect, which can quickly achieve bone integration, and is beneficial to the long-term biological fixation of the acetabulum bone and the articular surface prosthesis.

[0064] Example 6 The present application also provides a method for personalized customization of the acetabular repair prosthesis as described above, comprising: Step 1: Scan the hip joint to be repaired, collect the scanned image of the hip joint, and construct a three-dimensional model of the hip joint based on the scanned image; The scanning method may be a conventional scanning detection method such as CT scanning, magnetic resonance imaging scanning or X-ray scanning; Step 2, manually identifying the part of the acetabulum that needs to be repaired, intercepting the acetabulum spherical structure at the part of the acetabulum that needs to be repaired from the three-dimensional model of the hip joint, and intercepting the femoral head spherical structure at the part of the physiological femoral head or the femoral head replacement that is opposite to the part of the acetabulum that needs to be repaired; Step 3, setting an outer spherical surface offset based on the acetabular spherical surface structure to obtain an outer spherical surface structure of the articular surface prosthesis; ensuring that the spherical diameter of the outer spherical surface of the articular surface prosthesis matches the spherical diameter of the acetabular cancellous bone to be repaired, so that the outer spherical surface can fit the cancellous bone of the acetabulum to be repaired; An inner spherical surface offset is set on the basis of the spherical surface structure of the femoral head to obtain an inner spherical surface structure of the articular surface prosthesis; the spherical diameter of the inner spherical surface of the articular surface prosthesis is ensured to match the spherical diameter of the physiological femoral head or the femoral head replacement prosthesis, so that the inner spherical surface can be slidably matched with the spherical surface of the physiological femoral head or the femoral head replacement prosthesis; The thickness of the acetabulum lunate surface collected from the three-dimensional model of the hip joint is set as the thickness of the articular surface prosthesis, and the three-dimensional model of the articular surface prosthesis is constructed based on the outer spherical surface structure and the inner spherical surface structure; Among them, the outer spherical surface offset and the inner spherical surface offset are preset offsets based on historical data and implementation experience. After the outer spherical surface offset is set and adjusted, the outer spherical surface of the articular surface prosthesis can better fit with the cancellous bone of the acetabulum to be repaired, and after the inner spherical surface offset is set and adjusted, the inner spherical surface of the articular surface prosthesis can better achieve spherical sliding cooperation with the physiological femoral head or femoral head replacement prosthesis; It should be noted that the above steps 1 to 3 can be used to obtain the structure of the outer spherical surface and the inner spherical surface of the joint surface prosthesis (i.e., the shape and size of the outer spherical surface and the inner spherical surface), as well as the thickness data of the joint surface prosthesis. Therefore, it can be achieved by using conventional modeling software in the prior art, which belongs to the common knowledge in the art. The modeling software and the operation method of the modeling software specifically used in this part do not belong to the invention of this scheme, nor are they within the protection scope of this scheme. Step 4: importing a plurality of preset three-dimensional models of conical conductive columns into the three-dimensional model of the joint surface prosthesis, and arranging them on one side of the outer spherical surface of the joint surface prosthesis to obtain a three-dimensional model of the acetabulum repair prosthesis; Step 5, importing the three-dimensional model of the acetabulum repair prosthesis into the three-dimensional model of the hip joint to be repaired, adjusting the axis directions of several of the conduction columns so that the axes of several of the conduction columns point to the sacroiliac joint, eliminating shear stress and optimizing mechanical conduction; Step 6: After the axis of the conductive post is adjusted, a hole structure is arranged on the three-dimensional model of the acetabulum repair prosthesis according to a preset pore size and porosity. The hole structure can be selectively arranged on the articular surface prosthesis and / or the conductive post; if the hole structure is arranged on one side of the inner spherical surface of the articular surface prosthesis, rounding is also required; The basic modeling data of the acetabular repair prosthesis can be obtained by adopting the above steps 4 to 6, so it can be realized by adopting conventional modeling software in the prior art, which belongs to the common knowledge in the art. The modeling software and the operation method of the modeling software specifically adopted in this part do not belong to the invention point of this scheme, nor are they within the protection scope of this scheme; Step 7: Based on the three-dimensional model of the acetabular repair prosthesis after the hole structure is arranged, a preset material is selected, and the acetabular repair prosthesis is printed and formed by 3D printing; Wherein, the preset material is usually a carbon fiber reinforced polyetheretherketone (CFR-PEEK) composite material; Step 8: Apply a biological coating on the surface of the outer spherical surface of the articular surface prosthesis of the acetabular repair prosthesis in an area where the hole structure is not provided, thereby completing the personalized customization of the acetabular repair prosthesis.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An acetabular repair prosthesis, characterized in that: include: An articular surface prosthesis and several conductive posts; The articular surface prosthesis is half-moon shaped; One side of the articular surface prosthesis is provided with an outer spherical surface, and the outer spherical surface fits with the cancellous bone of the acetabulum to be repaired. The articular surface prosthesis contacts and fits with the cancellous bone of the acetabulum to be repaired through the outer spherical surface to form a bone interface; The other side of the articular surface prosthesis is provided with an inner spherical surface, and the inner spherical surface realizes spherical sliding cooperation with the physiological femoral head or the femoral head replacement prosthesis, and the articular surface prosthesis cooperates with the physiological femoral head or the femoral head replacement prosthesis through the inner spherical surface to form a ball-and-socket joint; The articular surface prosthesis is provided with a plurality of conductive columns on one side of the outer spherical surface, the axes of the plurality of conductive columns are all directed toward the sacroiliac joint, and the conductive columns are inserted into the drilled holes on the cancellous bone of the acetabulum to be repaired for positioning the articular surface prosthesis.

2. The acetabular repair prosthesis according to claim 1, characterized in that: The joint surface prosthesis is provided with a plurality of hole structures, and the hole structures are arranged on the outer spherical surface, so that the bone of the acetabulum can grow into the hole structures.

3. The acetabular repair prosthesis according to claim 2, characterized in that: The hole structure is a through hole, one end of the hole structure passes through the outer spherical surface, and the other end of the hole structure passes through the inner spherical surface.

4. The acetabular repair prosthesis according to claim 3, characterized in that: The hole structure is a stepped through hole, the hole diameter of the hole structure on the side of the outer spherical surface is large, and the hole diameter of the hole structure on the side of the inner spherical surface is small.

5. The acetabular repair prosthesis according to claim 2, characterized in that: The edge of the hole structure on one side of the inner spherical surface is chamfered.

6. The acetabular repair prosthesis according to claim 2, characterized in that: The hole structure is a blind hole, and the hole structure does not penetrate the joint surface prosthesis; The outer spherical surface is provided with the hole structure; The inner spherical surface is a solid surface and the hole structure is not provided.

7. The acetabular repair prosthesis according to claim 2, characterized in that: The conductive column is provided with a plurality of hole structures, which are blind holes and are arranged on the surface of the conductive column.

8. The acetabular repair prosthesis according to claim 2, characterized in that: A plurality of the hole structures are arranged on the surface and inside of the conductive column, and the hole structures are interconnected to form a porous structure for the bone of the acetabulum to grow into the porous structure.

9. The acetabular repair prosthesis according to claim 1, characterized in that: The conductive post is conical, and one end of the conductive post connected to the acetabular repair prosthesis is large in size, so as to prevent the acetabular repair prosthesis from sinking into the acetabulum.

10. The acetabular repair prosthesis according to claim 1, characterized in that: The acetabular repair prosthesis is made of a soft polymer material or a soft polymer composite material; The matrix material and the soft polymer material of the soft polymer composite material are polyethylene or polyetheretherketone.

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