A universal femoral head repair module and its use method

Abstract

A universal femoral head repair module, characterized in that it includes a spherical patch and an axial positioning rod. According to the difference between the stabilization mode of the femoral head repair module and normal bone tissue, the femoral head repair module is a bone cement type femoral head repair module or a biological type femoral head repair module. According to the different materials, the spherical patch of the bone cement type femoral head repair module is a metal spherical patch, a polyethylene spherical patch or a ceramic spherical patch. The biological type femoral head repair module also includes a cancellous bone screw; according to the different materials, the spherical patch is a biological type metal spherical patch, a biological type polyethylene spherical patch or a biological type ceramic spherical patch. This method also includes a method for using a universal femoral head repair module. The purpose of the present invention is to solve the problem of low applicability of femoral head replacement materials, to provide a femoral head repair module and a method for using the same, to use the femoral head repair module and the method for using the same to repair the diseased femoral head, to avoid the progression of femoral head lesions and the formation of hip osteoarthritis.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial joint prostheses, and more specifically, to a universal femoral head repair module and a use method thereof. Background Art

[0002] The femur is the most important bone in the human body, and the femoral head is even more important. Human upright walking, activities, and labor all rely on the support of the femoral head, so the femoral head is also the most vulnerable part. Osteonecrosis of the femoral head (ONFH) is a disabling disease with multifactorial origins. 94% of early asymptomatic ONFH will develop into mid-term or late stage within 5 years without treatment, resulting in flattened femoral head and severe narrowing of the joint space, which requires artificial replacement.

[0003] The invention patent with application number CN201510661290.9 and invention name of the method for making a customized femoral head necrosis repair module using three-dimensional printing technology discloses a method for making a customized femoral head necrosis repair module using three-dimensional printing technology, the method comprising the following steps: reconstructing the patient's femoral head by computer tomography, making a femoral head prosthesis model on the computer's three-dimensional graphics, so as to simulate the condition of the patient's femoral head on the femoral head prosthesis model; removing the necrotic collapsed part of the femoral head prosthesis model; making a repair module for filling the necrotic collapsed part of the femoral head of the patient according to the three-dimensional image of the bone part of the patient's femoral head and the bone boundary obtained after removing the necrotic collapsed part; printing the repair module using a three-dimensional printer; wherein the material of the repair module can be titanium alloy material or polyethylene material. The femoral head prosthesis and the method of use of the present invention have good wear resistance, biocompatibility and stability; and can be customized to make a femoral head prosthesis that is highly consistent with the patient.

[0004] The invention patent with application number CN201911390719.X and invention name "A manufacturing process for a surface replacement femoral head and a femoral head" discloses a manufacturing process for a surface replacement femoral head and a femoral head, including a femoral stem and a femoral head body, the femoral head body is provided with a replacement fixing cavity pointing to the femoral stem, the surface of the femoral head body is polished with a replacement cutting surface, the surface of the replacement cutting surface is fixedly provided with a replacement femoral head surface, the replacement femoral head surface includes a replacement surface and a plug-in rod, the replacement surface is tightly fitted with the replacement cutting surface, a fitting cavity for fitting the femoral head body is provided inside the replacement surface, a plug-in rod is provided between the inside of the fitting cavity and the middle part of the replacement surface, the invention is scientific and reasonable, safe and convenient to use, and improves the replacement prosthesis, so that the replacement prosthesis is composed of a replacement surface and a plug-in rod, so that the replacement surface can be manufactured using a forging process, the strength and wear resistance of the replacement surface are increased, the plug-in rod can be manufactured and produced using any manufacturing process, and the production cost is reduced.

[0005] The disadvantage is that the requirements for femoral head replacement materials in reality or in the above-mentioned public documents are high, and the scope of application is small, and it cannot be used in a large area. Summary of the invention

[0006] To solve the above problems, the purpose of the present invention is to solve the problem of low applicability of femoral head replacement materials, and to provide a femoral head repair module and a method of using the same. This femoral head repair module and a method of using the same are used to repair the diseased femoral head, thereby avoiding the progression of femoral head lesions and the formation of hip osteoarthritis.

[0007] The above technical purpose of the present invention is achieved through the following technical solutions: a universal femoral head repair module, including a spherical patch and an axial positioning rod. According to the difference in the stabilization mode between the femoral head repair module and normal bone tissue, the femoral head repair module is a bone cement type femoral head repair module or a biological femoral head repair module.

[0008] The spherical patch of the bone cement type femoral head repair module is a metal spherical patch, a polyethylene spherical patch or a ceramic spherical patch according to different materials.

[0009] The metal spherical patch is a spherical structure with an outer surface and an inner surface parallel in the same direction. The outer surface is polished to reduce the friction between the outer surface of the metal spherical patch and the acetabular cartilage. The inner surface is roughened to enhance the adhesion between the inner surface of the metal spherical patch and bone cement. A raised columnar thread structure is provided at the axis of the inner surface. The columnar thread structure is used for threaded connection with the axial positioning rod. The purpose is to make the axis line of the axial positioning rod, the center of the femoral head and the axis of the inner surface on the same axis, so as to ensure that the axial positioning rod is installed along the axis direction of the femoral head.

[0010] The biological femoral head repair module also includes cancellous bone screws; depending on the material, the spherical patch is a biological metal spherical patch, a biological polyethylene spherical patch or a biological ceramic spherical patch.

[0011] The biological metal spherical patch includes a biological metal surface gasket and a biological metal base. The inner surface of the biological metal surface gasket and the outer surface of the biological metal base are both coaxial spherical designs. The outer surface of the biological metal surface gasket is polished to reduce the friction between the outer surface of the biological metal spherical patch and the acetabular cartilage. The inner surface of the biological metal surface gasket is roughened to fix the biological metal surface gasket to the outer surface of the biological metal base with bone cement.

[0012] Preferably, the polyethylene spherical patch comprises a polyethylene surface gasket and a bone cement type metal base, the inner surface of the polyethylene surface gasket is attached to the outer surface of the bone cement type metal base, and is a coaxial spherical design, and the edge of the outer surface of the bone cement type metal base is provided with 4-10 teeth, the purpose of which is to fix the polyethylene surface gasket to the outer surface of the bone cement type metal base;

[0013] The ceramic spherical patch includes a ceramic surface gasket and a bone cement type metal base. The inner surface of the ceramic surface gasket is attached to the outer surface of the bone cement type metal base and is a coaxial spherical design. The edge of the outer surface of the bone cement type metal base is provided with 4-10 teeth, the purpose of which is to fix the ceramic surface gasket to the outer surface of the bone cement type metal base.

[0014] Further preferably, the inner surface of the bone cement type metal base is roughened to enhance the adhesion between the inner surface of the bone cement type metal base and bone cement. A raised columnar thread structure is provided at the axis of the inner surface of the bone cement type metal base. The columnar thread structure is threadedly connected to the axial positioning rod to facilitate the installation of the axial positioning rod along the axial direction of the femoral head.

[0015] Preferably, the bio-type polyethylene spherical patch comprises a bio-type polyethylene surface gasket and a bio-type metal base, the inner surface of the bio-type polyethylene surface gasket and the outer surface of the bio-type metal base are co-directional and coaxial spherical designs, and the edge of the bio-type metal base is provided with 4-10 teeth, the purpose of which is to fix the bio-type polyethylene surface gasket to the outer surface of the bio-type metal base;

[0016] The bio-type ceramic spherical patch includes a bio-type ceramic surface gasket and a bio-type metal base. The inner surface of the bio-type ceramic surface gasket and the outer surface of the bio-type metal base are designed as co-directional and coaxial spherical surfaces. The edge of the outer surface of the bio-type metal base is provided with 4-10 teeth, the purpose of which is to fix the bio-type ceramic surface gasket to the outer surface of the bio-type metal base.

[0017] Further preferably, the biotype metal base is a 3D printed metal trabecular structure, the purpose of which is to achieve bone ingrowth of normal femoral head bone tissue, the inner surface of the biotype metal base is provided with eccentrically raised micro-barbs around it for locking with the normal bone tissue of the femoral head, the biotype metal base is provided with 3-6 cancellous bone screw holes, through which the biotype metal base can be further anchored in the normal bone tissue of the femoral head by using cancellous bone screws, the inner surface of the biotype metal base is provided with a raised columnar thread structure at the axis, the columnar thread structure is threadedly connected to the axial positioning rod, the purpose of which is to promote the installation of the axial positioning rod along the axial direction, thereby ensuring that the outer surface of the metal spherical patch and the outer surface of the femoral head can form a complete sphere.

[0018] Preferably, the axial positioning rod is made of metal, and the length of the axial positioning rod is 5-40 mm.

[0019] A method for using a universal femoral head repair module comprises the following steps:

[0020] S1. Perform a computerized tomography scan on the patient's femoral head and reconstruct the three-dimensional image of the patient's femoral head to evaluate the boundary between the patient's tissue and normal bone tissue, and use the scan results to determine the diameter R1 of the femoral head and the maximum surface diameter R2 of the patient's femoral head tissue;

[0021] S2. Dislocate and expose the necrotic tissue of the femoral head. Remove the necrotic tissue of the femoral head and locate its axis. Use femoral head files from small to large to grind the irregular femoral head bone defect area left after the removal of the necrotic tissue of the femoral head until a relatively regular hemispherical or sub-hemispherical bone defect area is formed.

[0022] S3, using an axis locator to locate the axis of the femoral head patient tissue through the center point of the patient tissue surface;

[0023] S4, preparing and installing a femoral head repair module;

[0024] S5. Reposition the dislocated hip joint and suture the wounds one by one.

[0025] Preferably, the femoral head repair module is a bone cement type femoral head repair module, and step S4 includes the following steps:

[0026] S411, stirring bone cement, and filling the stirred bone cement into the femoral head bone defect area left after the femoral head necrotic tissue was removed in step S2;

[0027] S412, selecting a spherical patch with a spherical diameter R1 and a plane diameter R2, placing the axial positioning rod of the bone cement type femoral head repair module along the axis of the femoral head necrotic tissue, so that the outer surface of the bone cement type femoral head repair module is aligned with the edge of the normal bone tissue around the femoral head necrotic tissue, thereby forming a complete femoral head spherical surface, wherein the outer surface of the cement type femoral head repair module is the outer surface of one of the metal spherical patch, the polyethylene spherical patch and the ceramic spherical patch;

[0028] S413. Wait for the bone cement to dry and harden.

[0029] Preferably, when the femoral head repair module is a biological metal spherical femoral head repair module, the method of using the module is as follows:

[0030] The stirred bone cement is applied to the outer surface of the biological metal base, and the biological metal surface gasket is installed on the bone cement. The purpose is to use the bone cement to fix the biological metal surface gasket to the surface of the biological metal base, so that the outer surface of the metal spherical patch is aligned with the edge of the normal bone tissue around the femoral head necrotic tissue, thereby forming a complete femoral head spherical surface.

[0031] When the femoral head repair module is a bio-type polyethylene spherical femoral head repair module or a bio-type ceramic spherical femoral head repair module, its usage method is: directly install the bio-type polyethylene gasket or the bio-type ceramic gasket on the outer surface of the bio-type metal base, and use the teeth on the edge of the outer surface of the bio-type metal base to fix the bio-type polyethylene gasket or the bio-type ceramic gasket to the outer surface of the bio-type metal base, so that the outer surface of the bio-type polyethylene or bio-type ceramic gasket spherical patch is aligned with the edge of the normal bone tissue around the necrotic tissue of the femoral head, thereby forming a complete femoral head spherical surface.

[0032] Preferably, the femoral head repair module is a biological femoral head repair module, and step S4 includes the following steps:

[0033] S421, selecting a spherical patch with a spherical diameter R1 and a plane diameter R2;

[0034] S422. First, install the biological metal base. Pressurize and place the biological metal base in the axial direction of the femoral head bone defect area left by grinding the necrotic tissue of the femoral head in step S2. Use the micro-barbs around the inner surface of the biological metal base to lock the normal bone tissue of the femoral head. At the same time, use cancellous bone screws through the cancellous bone screw holes in the biological metal base to further fix the biological metal base to the surface of the normal bone tissue of the femoral head.

[0035] The principle of the present invention: on the one hand, according to the filling material inside, it is divided into two types of bone cement type femoral head repair modules and biological femoral head, and according to the material of the outermost patch, there are three types of each, which enhances the applicability of the present invention; on the other hand, since the femoral head is a spherical structure, the axial positioning rod is installed along the axial direction and the spherical patch is a spherical structure, after the axial positioning rod is fixed with the axis of the inner surface of the spherical patch by vertical threads, it is only necessary to install the axial positioning rod along the axial direction to accurately install the femoral head repair module.

[0036] The materials of the metal spherical patch and the biological metal surface gasket are aluminum alloy or titanium alloy, and the outer surfaces are designed to be spherical curved surfaces based on the external shape characteristics of the composite femoral head. The biological metal surface gasket and the biological metal base are externally fixed through the adhesive effect of bone cement to enhance the stability of the femoral head repair module.

[0037] In summary, the present invention has the following beneficial effects:

[0038] First, compared with the invention patent with application number CN201510661290.9 and invention name "Method for making customized femoral head necrosis repair module using three-dimensional printing technology", the femoral repair module and its use method involved in the present invention have better versatility and practicality, and are easier to promote clinically.

[0039] Secondly, compared with the invention patent with application number CN201911390719.X and invention name "A manufacturing process for surface replacement of femoral head and femoral head", the femoral repair module and its use method involved in the present invention can avoid or delay the patients with avascular necrosis of femoral head from undergoing artificial hip surface replacement or artificial total hip replacement.

[0040] Third, in the polyethylene spherical patch and the ceramic spherical patch, the bone cement type metal base is a spherical metal sheet. The specific method is to attach a polyethylene spherical patch or a ceramic spherical patch with special physical properties to the outer surface of the metal sheet. The polyethylene spherical patch has the advantages of low cost, easy shaping, waterproof, comfortable, moderate elasticity and toughness, and the ceramic spherical patch has the advantages of strong wear resistance, small wear and only produces a small number of particles, and has a very long service life.

[0041] Fourthly, in the bio-type polyethylene spherical patch and the bio-type ceramic spherical patch, the outer surface of the bio-type metal base is bonded with the bio-type polyethylene spherical patch or the bio-type ceramic spherical patch with special physical properties;

[0042] Fifthly, the centrifugally protruding micro-barbs and cancellous bone screw holes provided on the biological metal base are used to enhance the fixation stability of the bone repair module and the femoral head. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of Example 1;

[0044] Figure 2 Disassembly diagram of the femoral head repair module in Example 1

[0045] Figure 3 is a schematic diagram of a femoral head repair module in Example 2;

[0046] Figure 4 is a schematic diagram of a femoral head repair module in Example 3;

[0047] Figure 5 It is a schematic diagram of Example 4;

[0048] Figure 6 Disassembly diagram of the femoral head repair module in Example 4

[0049] Figure 7 is a schematic diagram of a femoral head repair module in Example 5;

[0050] Figure 8 is a schematic diagram of a femoral head repair module in Example 6;

[0051] In the figure: 1. Axial positioning rod; 2. Bone cement; 3. Metal spherical patch; 4. Polyethylene spherical patch; 5. Ceramic spherical patch; 6. Biological metal base; 7. Biological metal spherical patch; 8. Biological polyethylene spherical patch; 9. Biological ceramic spherical patch; 10. Bone screw hole; 11. Micro barb; 12. Columnar thread structure. DETAILED DESCRIPTION

[0052] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or explicitly stating that the referred weighing or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or explicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Example 1

[0057] For more information, see Figure 1-Figure 2 A method for using a universal femoral head repair module comprises the following steps:

[0058] S1. Perform a computerized tomography scan on the patient's femoral head and reconstruct the three-dimensional image of the patient's femoral head to evaluate the boundary between the patient's tissue and normal bone tissue, and use the scan results to determine the diameter R1 of the femoral head and the maximum surface diameter R2 of the patient's femoral head tissue;

[0059] S2. Dislocate and expose the necrotic tissue of the femoral head. Remove the necrotic tissue of the femoral head and locate its axis. Use femoral head files from small to large to grind the irregular femoral head bone defect area left after the removal of the necrotic tissue of the femoral head until a relatively regular hemispherical or sub-hemispherical bone defect area is formed.

[0060] S3, using an axis locator to locate the axis of the femoral head patient tissue through the center point of the patient tissue surface;

[0061] S4, preparing and installing a femoral head repair module;

[0062] S411, stirring bone cement 2, and filling the stirred bone cement 2 into the femoral head bone defect area left after the femoral head necrotic tissue was removed in step S2;

[0063] S412, selecting a spherical patch with a spherical diameter R1 and a plane diameter R2, placing the axial positioning rod 1 of the bone cement type 2 femoral head repair module along the axis of the femoral head necrotic tissue, so that the outer surface of the bone cement type 2 femoral head repair module is aligned with the edge of the normal bone tissue around the femoral head necrotic tissue, thereby forming a complete femoral head spherical surface, wherein the outer surface of the cement type femoral head repair module is the outer surface of one of the metal spherical patch 3, the polyethylene spherical patch 4 and the ceramic spherical patch 5;

[0064] S413, waiting for the bone cement 2 to dry and harden.

[0065] S5. Reposition the dislocated hip joint and suture the wounds one by one.

[0066] Among them, the femoral head repair module selected in this embodiment is a bone cement type 2 metal spherical femoral head repair module, the spherical patch is a metal spherical patch 3, the metal spherical patch 3 is a spherical structure with an outer surface and an inner surface in the same direction and parallel to each other, the outer surface is polished, the purpose of which is to reduce the friction between the outer surface of the metal spherical patch 3 and the acetabular cartilage, the inner surface is roughened, the purpose of which is to enhance the adhesion between the inner surface of the metal spherical patch 3 and the bone cement 2, and a raised columnar thread structure 12 is provided at the axis of the inner surface, the columnar thread structure 12 is used for threaded connection with the axial positioning rod 1, the purpose of which is to cause the axis line of the axial positioning rod 1, the center of the femoral head and the axis of the inner surface to be on the same axis, to ensure that the axial positioning rod 1 is installed along the axis direction of the femoral head.

[0067] The axis positioning rod 1 is made of metal, and the length of the axis positioning rod 1 is 30 mm.

[0068] Example 2

[0069] For more information, see Figure 3 The difference between Example 2 and Example 1 is that the femoral head repair module selected in this example is a bone cement type 2 polyethylene spherical femoral head repair module, and the spherical patch is a polyethylene spherical patch 4. The polyethylene spherical patch 4 includes a polyethylene surface gasket and a bone cement type 2 metal base. The inner surface of the polyethylene surface gasket is attached to the outer surface of the bone cement type 2 metal base, and is a coaxial spherical design. The edge of the outer surface of the bone cement type 2 metal base is provided with 4 teeth, the purpose of which is to fix the polyethylene surface gasket to the outer surface of the bone cement type 2 metal base.

[0070] Example 3

[0071] For more information, see Figure 4 The difference between Example 3 and Example 1 is that the femoral head repair module selected in this embodiment is a bone cement type 2 ceramic spherical femoral head repair module, and the spherical patch is a ceramic spherical patch 5. The ceramic spherical patch 5 includes a ceramic surface gasket and a bone cement type 2 metal base. The inner surface of the ceramic surface gasket is attached to the outer surface of the bone cement type 2 metal base, and is a coaxial spherical design. The edge of the outer surface of the bone cement type 2 metal base is provided with 10 teeth, and the purpose is to fix the ceramic surface gasket to the outer surface of the bone cement type 2 metal base.

[0072] Example 4

[0073] For more information, see Figure 5-6 A method for using a universal femoral head repair module comprises the following steps:

[0074] S1. Perform a computerized tomography scan on the patient's femoral head and reconstruct the three-dimensional image of the patient's femoral head to evaluate the boundary between the patient's tissue and normal bone tissue, and use the scan results to determine the diameter R1 of the femoral head and the maximum surface diameter R2 of the patient's femoral head tissue;

[0075] S2. Dislocate and expose the necrotic tissue of the femoral head. Remove the necrotic tissue of the femoral head and locate its axis. Use femoral head files from small to large to grind the irregular femoral head bone defect area left after the removal of the necrotic tissue of the femoral head until a relatively regular hemispherical or sub-hemispherical bone defect area is formed.

[0076] S3, using an axis locator to locate the axis of the femoral head patient tissue through the center point of the patient tissue surface;

[0077] S4, prepare and install the femoral head repair module,

[0078] S421, selecting a spherical patch with a spherical diameter R1 and a plane diameter R2;

[0079] S422, firstly install the biological metal base 6, pressurize and place the biological metal base 6 in the axial direction of the femoral head bone defect area left by grinding the femoral head necrotic tissue in step S2, use the bone screw holes 11 around the inner surface of the biological metal base 6 to lock the normal bone tissue of the femoral head, and use cancellous bone screws through the cancellous bone screw holes 10 in the biological metal base 6 to further fix the biological metal base 6 to the surface of the normal bone tissue of the femoral head;

[0080] S5. Reposition the dislocated hip joint and suture the wounds one by one.

[0081] Among them, the biotype metal base 6 is a 3D printed metal trabecular structure, and its purpose is to achieve bone ingrowth of normal femoral head bone tissue. The inner surface of the biotype metal base 6 is provided with centrifugal protruding bone screw holes 11 around it to achieve locking with the normal bone tissue of the femoral head. The biotype metal base 6 is provided with 6 cancellous bone screw holes 10, through which the biotype metal base 6 can be further anchored in the normal bone tissue of the femoral head by using cancellous bone screws. A protruding columnar thread structure 12 is provided at the axis of the inner surface of the biotype metal base 6, and the columnar thread structure 12 is threadedly connected to the axial positioning rod 1. Its purpose is to promote the installation of the axial positioning rod 1 along the axial direction, thereby ensuring that the outer surface of the metal spherical patch 3 and the outer surface of the femoral head can form a complete sphere.

[0082] Among them, when the femoral head repair module is a biological metal spherical femoral head repair module, its use method is: apply the stirred bone cement 2 to the outer surface of the biological metal base 6, and install the biological metal surface gasket 7 on the bone cement 2. The purpose is to use the bone cement 2 to fix the biological metal surface gasket 7 to the surface of the biological metal base 6, so that the outer surface of the metal spherical patch 3 is aligned with the edge of the normal bone tissue around the femoral head necrotic tissue, thereby forming a complete femoral head spherical surface.

[0083] Among them, the femoral head repair module selected in this embodiment is a biological metal spherical femoral head repair module, the spherical patch is a biological metal spherical patch, the biological metal spherical patch includes a biological metal surface gasket 7 and a biological metal base 6, the inner surface of the biological metal surface gasket 7 and the outer surface of the biological metal base 6 are both coaxial spherical designs, the outer surface of the biological metal surface gasket 7 is polished, the purpose of which is to reduce the friction between the outer surface of the biological metal spherical patch and the acetabular cartilage, and the inner surface of the biological metal surface gasket 7 is roughened, the purpose of which is to fix the biological metal surface gasket 7 to the outer surface of the biological metal base 6 using bone cement 2.

[0084] The axis positioning rod 1 is made of metal, and the length of the axis positioning rod 1 is 8 mm.

[0085] Example 5

[0086] For more information, see Figure 7 , the difference between Example 5 and Example 4 is that: the femoral head repair module selected in this embodiment is a biological polyethylene spherical femoral head repair module, the spherical patch is a biological polyethylene spherical patch, the biological polyethylene spherical patch includes a biological polyethylene surface gasket 8 and a biological metal base 6, the inner surface of the biological polyethylene surface gasket 8 and the outer surface of the biological metal base 6 are co-directional and coaxial spherical designs, and the edge of the biological metal base 6 is provided with 10 teeth, the purpose of which is to fix the biological polyethylene surface gasket 8 to the outer surface of the biological metal base 6;

[0087] Among them, when the femoral head repair module is a bio-type polyethylene spherical femoral head repair module, its usage method is: directly install the bio-type polyethylene gasket on the outer surface of the bio-type metal base 6, and use the teeth on the edge of the outer surface of the bio-type metal base 6 to fix the bio-type polyethylene gasket to the outer surface of the bio-type metal base 6, so that the outer surface of the bio-type polyethylene spherical patch is aligned with the edge of the normal bone tissue around the necrotic tissue of the femoral head, thereby forming a complete femoral head spherical surface.

[0088] Example 6

[0089] For more information, see Figure 8 The difference between Example 6 and Example 4 is that the femoral head repair module selected in this embodiment is a bio-ceramic spherical femoral head repair module, and the spherical patch is a bio-ceramic spherical patch. The bio-ceramic spherical patch includes a bio-ceramic surface gasket 9 and a bio-type metal base 6. The inner surface of the bio-ceramic surface gasket 9 and the outer surface of the bio-type metal base 6 are of the same direction and coaxial spherical design. The edge of the outer surface of the bio-type metal base 6 is provided with 5 teeth, the purpose of which is to fix the bio-ceramic surface gasket 9 to the outer surface of the bio-type metal base 6.

[0090] Among them, when the femoral head repair module is a bio-ceramic spherical femoral head repair module, its usage method is: directly install the bio-ceramic gasket on the outer surface of the bio-type metal base 6, and use the teeth on the edge of the outer surface of the bio-type metal base 6 to fix the bio-ceramic gasket to the outer surface of the bio-type metal base 6, so that the outer surface of the bio-ceramic spherical patch is aligned with the edge of the normal bone tissue around the necrotic tissue of the femoral head, thereby forming a complete femoral head spherical surface.

[0091] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A universal femoral head repair module, characterized in that: It includes a spherical patch and an axial positioning rod. According to the difference in the stabilization mode between the femoral head repair module and the normal bone tissue, the femoral head repair module is a bone cement type femoral head repair module or a biological type femoral head repair module; The bone cement type femoral head repair module has a spherical patch, which is a bone cement type metal spherical patch, a bone cement type polyethylene spherical patch or a bone cement type ceramic spherical patch, depending on the material. The bone cement type metal spherical patch is a spherical structure with an outer surface and an inner surface parallel in the same direction. The outer surface is polished to reduce the friction between the outer surface of the bone cement type metal spherical patch and the acetabular cartilage. The inner surface is roughened to enhance the adhesion between the inner surface of the bone cement type metal spherical patch and the bone cement. A raised columnar thread structure is provided at the axis of the inner surface. The columnar thread structure is used for threaded connection with the axis positioning rod. The purpose is to make the axis line of the axis positioning rod, the center of the femoral head and the axis of the inner surface on the same axis, and ensure that the axis positioning rod is installed along the axis direction of the femoral head. The biological femoral head repair module also includes cancellous bone screws; depending on the material, the spherical patch is a biological metal spherical patch, a biological polyethylene spherical patch or a biological ceramic spherical patch; The biological metal spherical patch includes a biological metal surface gasket and a biological metal base. The inner surface of the biological metal surface gasket and the outer surface of the biological metal base are both coaxial spherical designs. The outer surface of the biological metal surface gasket is polished to reduce the friction between the outer surface of the biological metal spherical patch and the acetabular cartilage. The inner surface of the biological metal surface gasket is roughened to fix the biological metal surface gasket to the outer surface of the biological metal base by bone cement. The bone cement type polyethylene spherical patch includes a bone cement type polyethylene surface gasket and a bone cement type metal base. The inner surface of the bone cement type polyethylene surface gasket is attached to the outer surface of the bone cement type metal base and is a coaxial spherical design. The edge of the outer surface of the bone cement type metal base is provided with 4-10 clamping teeth, the purpose of which is to fix the bone cement type polyethylene surface gasket to the outer surface of the bone cement type metal base. The bone cement ceramic spherical patch includes a bone cement ceramic surface gasket and a bone cement metal base. The inner surface of the bone cement ceramic surface gasket is attached to the outer surface of the bone cement metal base and is a coaxial spherical design. The edge of the outer surface of the bone cement metal base is provided with 4-10 teeth, the purpose of which is to fix the bone cement ceramic surface gasket to the outer surface of the bone cement metal base. The inner surface of the bone cement type metal base is roughened to enhance the adhesion between the inner surface of the bone cement type metal base and the bone cement. A protruding columnar thread structure is provided at the axis of the inner surface of the bone cement type metal base. The columnar thread structure is threadedly connected with the axis positioning rod to facilitate the installation of the axis positioning rod along the axis direction of the femoral head. The biological polyethylene spherical patch includes a biological polyethylene surface gasket and a biological metal base. The inner surface of the biological polyethylene surface gasket and the outer surface of the biological metal base are designed as co-directional and coaxial spherical surfaces. The edge of the biological metal base is provided with 4-10 teeth, the purpose of which is to fix the biological polyethylene surface gasket to the outer surface of the biological metal base. The bio-type ceramic spherical patch includes a bio-type ceramic surface gasket and a bio-type metal base. The inner surface of the bio-type ceramic surface gasket and the outer surface of the bio-type metal base are designed as co-directional and coaxial spherical surfaces. The edge of the outer surface of the bio-type metal base is provided with 4-10 teeth, the purpose of which is to fix the bio-type ceramic surface gasket to the outer surface of the bio-type metal base.

2. The femoral head repair module according to claim 1, characterized in that: The biological metal base is a 3D-printed metal trabecular structure, and its purpose is to achieve bone ingrowth of normal femoral head bone tissue. The inner surface of the biological metal base is provided with eccentrically raised micro-barbs around it to achieve locking with the normal bone tissue of the femoral head. The biological metal base is provided with 3-6 cancellous bone screw holes, through which the biological metal base can be anchored in the normal bone tissue of the femoral head by using cancellous bone screws. A raised columnar thread structure is provided at the axis of the inner surface of the biological metal base, and the columnar thread structure is threadedly connected to the axial positioning rod, and its purpose is to promote the installation of the axial positioning rod along the axial direction, thereby ensuring that the outer surface of the metal spherical patch and the outer surface of the femoral head can form a complete sphere.

3. The femoral head repair module according to claim 1, characterized in that: The axis positioning rod is made of metal, and the length of the axis positioning rod is 5-40mm.

4. The method for using the universal femoral head repair module according to claim 1, characterized in that: The following steps are involved: S1. Perform a computerized tomography scan on the patient's femoral head and reconstruct the three-dimensional image of the patient's femoral head to evaluate the boundary between the patient's tissue and normal bone tissue, and use the scan results to determine the diameter R1 of the femoral head and the maximum surface diameter R2 of the patient's femoral head tissue; S2. Dislocate and expose the necrotic tissue of the femoral head. Remove the necrotic tissue of the femoral head and locate its axis. Use femoral head files from small to large to grind the irregular femoral head bone defect area left after the removal of the necrotic tissue of the femoral head until a relatively regular hemispherical or sub-hemispherical bone defect area is formed. S3, using an axis locator to locate the axis of the femoral head patient tissue through the center point of the patient tissue surface; S4, preparing and installing a femoral head repair module; S5. Reposition the dislocated hip joint and suture the wounds one by one.

5. The method for using the universal femoral head repair module according to claim 4, characterized in that: The femoral head repair module is a bone cement type femoral head repair module, and step S4 includes the following steps: S411, stirring bone cement, and filling the stirred bone cement into the femoral head bone defect area left after the femoral head necrotic tissue was removed in step S2; S412, selecting a spherical patch with a spherical diameter R1 and a plane diameter R2, placing the axial positioning rod of the bone cement type femoral head repair module along the axis of the femoral head necrotic tissue, so that the outer surface of the bone cement type femoral head repair module is aligned with the edge of the normal bone tissue around the femoral head necrotic tissue, thereby forming a complete femoral head spherical surface, wherein the outer surface of the bone cement type femoral head repair module is the outer surface of one of the bone cement type metal spherical patch, the bone cement type polyethylene spherical patch and the bone cement type ceramic spherical patch; S413. Wait for the bone cement to dry and harden.

6. The method for using the universal femoral head repair module according to claim 4, characterized in that: When the femoral head repair module is a biological metal spherical femoral head repair module, the method of using it is as follows: The stirred bone cement is applied to the outer surface of the biological metal base, and the biological metal surface gasket is installed on the bone cement. The purpose is to use the bone cement to fix the biological metal surface gasket to the surface of the biological metal base, so that the outer surface of the metal spherical patch is aligned with the edge of the normal bone tissue around the femoral head necrotic tissue, thereby forming a complete femoral head spherical surface. When the femoral head repair module is a bio-type polyethylene spherical femoral head repair module or a bio-type ceramic spherical femoral head repair module, its usage method is: directly install the bio-type polyethylene gasket or the bio-type ceramic gasket on the outer surface of the bio-type metal base, and use the teeth on the edge of the outer surface of the bio-type metal base to fix the bio-type polyethylene gasket or the bio-type ceramic gasket to the outer surface of the bio-type metal base, so that the outer surface of the bio-type polyethylene or bio-type ceramic gasket spherical patch is aligned with the edge of the normal bone tissue around the necrotic tissue of the femoral head, thereby forming a complete femoral head spherical surface.

7. The method for using the femoral head repair module according to claim 4, characterized in that: The femoral head repair module is a biological femoral head repair module, and step S4 includes the following steps: S421, selecting a spherical patch with a spherical diameter R1 and a plane diameter R2; S422. First, install the biological metal base. Pressurize and place the biological metal base in the axial direction of the femoral head bone defect area left by grinding the necrotic tissue of the femoral head in step S2. Use the micro-barbs around the inner surface of the biological metal base to lock the normal bone tissue of the femoral head. At the same time, use cancellous bone screws through the cancellous bone screw holes in the biological metal base to further fix the biological metal base to the surface of the normal bone tissue of the femoral head.

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