A 3D printed individualized modular acetabular bone defect reconstruction prosthesis and preparation method thereof

Abstract

The present invention provides a 3D printed individualized combined acetabular bone defect reconstruction prosthesis and a preparation method thereof, belonging to the field of 3D printing technology. It includes an implantation pad, the bottom end of the implantation pad is provided with a first mounting screw hole, the inner wall of the first mounting screw hole is sleeved with a mounting screw, the inner wall of the implantation pad is provided with a second mounting screw hole, the top of the implantation pad is provided with a mounting liner, and the top of the mounting liner is provided with a mounting bracket; a connecting component, the top edge of the implantation pad is provided with a connecting component, the connecting component is used to connect between the implantation pad and the acetabulum; one end of the mounting bracket is provided with an adjustment component, the adjustment component is used to adjust the installation angle between the acetabulum bones. The present invention has a certain scalability during installation by providing a connecting component, and the degree of fit between bone parts is improved by providing an adjustment component to ensure stability during installation. The bone bonding interface adopts porous tantalum material, which is conducive to bone growth.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a 3D printed individualized combined acetabular bone defect reconstruction prosthesis and a preparation method thereof. Background Art

[0002] Artificial hip replacement is a safe and effective means of treating hip joint diseases. However, some patients need hip revision surgery due to various reasons such as prosthesis loosening, joint instability and joint infection. Conventional acetabular prostheses cannot solve the large-scale, irregular anatomical bone defects in the acetabulum caused by osteolysis, infection, etc. after hip replacement, and the reconstruction effect of the acetabular structure is directly related to the success of the operation. Porous tantalum has the characteristics of good tissue compatibility, elastic modulus similar to that of bones, favorable bone ingrowth, and drug loading. It is currently a very promising material in clinical practice, and plays a vital role in preventing patients from reinfection and the long-term stability of the prosthesis.

[0003] When the existing acetabular bone defect reconstruction prosthesis is installed, the acetabular bone defect is generally filled by the acetabular cup. However, the acetabular bone defects vary greatly, and the patient's acetabular bone needs to be processed twice when the acetabular cup is installed. The poor installation adaptability affects the installation efficiency of the prosthesis. At the same time, when the bone part around the patient's acetabulum is fixed and installed, there is a gap between the connecting part and the bone part around the acetabulum, and the stability after installation is poor.

[0004] Therefore, the present application provides a 3D printed individualized modular acetabular bone defect reconstruction prosthesis and a preparation method thereof to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a 3D printed individualized combined acetabular bone defect reconstruction prosthesis and a preparation method thereof to solve the problem that the existing acetabular bone defect reconstruction prosthesis generally fills the acetabular bone defect with an acetabular cup during installation, and the acetabular bone defect varies greatly, and the patient's acetabular bone needs to be secondary processed when the acetabular cup is installed, which has poor installation adaptability and affects the installation efficiency of the prosthesis. At the same time, when the bone part around the patient's acetabular bone is fixedly installed, there is a gap between the connecting part and the bone part around the acetabular bone, resulting in poor stability after installation.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A 3D printed individualized combined acetabular bone defect reconstruction prosthesis and a preparation method thereof, comprising an implantation pad, wherein a first mounting screw hole is provided through the bottom end of the implantation pad, a mounting screw is sleeved on the inner wall of the first mounting screw hole, a second mounting screw hole is provided on the inner wall of the implantation pad, a mounting liner is provided on the top end of the implantation pad, and a mounting bracket is provided on the top end of the mounting liner;

[0008] A connection component is provided at the top edge of the implant block, and the connection component is used to connect the implant block and the acetabulum;

[0009] An adjustment component is provided at one end of the mounting bracket, and the adjustment component is used to adjust the mounting angle between the acetabulum bones.

[0010] Optionally, the connecting component includes a first slide rail, the first slide rail is arranged at the top of the implant pad, slots are arranged on both sides of the first slide rail, the number of the slots is set to two groups, and the two groups of slots are coaxially arranged on both sides of the first slide rail.

[0011] Optionally, a connecting arc plate is provided at the top end of the first slide rail, a slide groove is provided at the bottom end of the connecting arc plate, and an inner wall of the slide groove is in contact with the top end surface of the first slide rail.

[0012] Optionally, a first telescopic rod is provided on one side of the inner wall of the slide groove, an arc-shaped clamping block is provided at one end of the first telescopic rod, the arc-shaped clamping block is arranged at equal angles on the inner wall of the slide groove, and one end surface of the arc-shaped clamping block contacts the inner wall of the slot.

[0013] Optionally, the surface of the connecting arc plate is provided with mounting nail holes, and the mounting nail holes are arranged at equal angles on the surface of the connecting arc plate. A second arc-shaped slide groove is provided on one side of the outer surface of the connecting arc plate, and the surface of the second arc-shaped slide groove is in contact with one surface of the arc-shaped slide groove. A mounting plate is provided at the bottom edge of the connecting arc plate.

[0014] Optionally, the adjustment assembly includes a mounting base, one end of the mounting base is arranged on one side of the mounting bracket, and one end of the mounting base is provided with a mounting chamber.

[0015] Optionally, a rotating rod is provided at one end of the mounting base, the outer surface of the rotating rod is in contact with the inner wall of the mounting chamber, the outer surface of the rotating rod is sleeved with a first spur gear, a second spur gear is meshed with one side of the first spur gear, and the second spur gear is arranged at an opening on one side of the mounting chamber.

[0016] Optionally, a clamping block is provided at one end of the second flat gear, the clamping block is provided at the top of the installation chamber, an elastic telescopic rod is provided at the bottom end of the clamping block, and the bottom end of the elastic telescopic rod is elastically connected to the top of the installation chamber.

[0017] Optionally, a rotating base is provided at one end of the rotating rod, a fixing plate is dampingly connected to the inner wall of the rotating base, a third mounting screw hole is provided through the top of the fixing plate, and the third mounting screw holes are arranged in an array at the top of the fixing plate.

[0018] Optionally, the steps of preparing the 3D printed individualized modular acetabular bone defect reconstruction prosthesis are as follows:

[0019] S1. Using a dedicated scanning device to collect model point cloud data of the patient's acetabulum, and creating a three-dimensional model of the acetabulum based on the obtained model point cloud data;

[0020] S2, using the obtained acetabulum three-dimensional model, using a 3D printing device to print a proportional acetabulum three-dimensional verification model of the patient, measuring and analyzing the patient's acetabulum, and reconstructing a three-dimensional model of the defective part of the patient's acetabulum;

[0021] S3. According to the bone condition of the patient's acetabulum, screw holes are reserved in the bone around the patient's acetabulum, the structural support topology of the 3D model of the acetabulum prosthesis is optimized, and then the finished product is 3D printed, and the surface of the acetabulum prosthesis obtained by 3D printing is smoothed;

[0022] S4. A three-dimensional model of an optimized integrated acetabular prosthesis was prepared based on 3D printing technology to obtain an integrated acetabular bone defect reconstruction prosthesis. When installing the prosthesis, a porous tantalum metal microporous structure was used at the bone bonding interface to simulate the trabecular structure.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] In the above scheme, by setting up a connecting component, through the cooperation between the first slide rail and the slide groove, and utilizing the clamping effect between the arc-shaped clamping block and the slot, and by arranging multiple groups of connecting arc plates at equal angles on the top of the first slide rail, medical staff can selectively and repeatedly install multiple groups of connecting arc plates according to the bone condition of the patient's acetabular bone defect, thereby improving the flexibility of the connecting arc plates in fixing the patient's acetabular bone defect, and making the connecting arc plates have a certain degree of scalability during installation, and can be adjusted and installed in real time according to the bone condition of the patient's acetabular bone defect.

[0025] By setting an adjustment component and utilizing the cooperation between the clamping block and the second flat gear, the rotation angle of the rotating base can be adjusted, thereby realizing synchronous adjustment of the angle of the fixing plate. At the same time, by adjusting the damping of the fixing plate, the angle adjustment of the fixing plate in two directions can be realized, so that when the fixing plate is used to fix the bone area around the acetabular bone defect of the patient, the fit between the fixing plate and the bone area around the acetabular bone defect of the patient is improved, the applicability of the fixing plate when fixing the bone area around the acetabular bone defect of the patient is improved, and the fixation effect of the fixing plate on the bone area around the acetabular bone defect of the patient is further improved to ensure stability during installation. At the same time, when installing the prosthesis, the bone bonding interface adopts a porous tantalum metal microporous structure to simulate the trabecular structure, which has the effect of preventing the patient from reinfection and improving the long-term stability of the prosthesis, and is more conducive to the growth and fusion of autologous bone, and increases the stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of a 3D-printed individualized modular acetabular bone defect reconstruction prosthesis;

[0028] Figure 2 A schematic diagram of the partial cross-sectional structure of a 3D-printed individualized modular acetabular bone defect reconstruction prosthesis;

[0029] Figure 3 Exploded view of 3D printed individualized modular acetabular bone defect reconstruction prosthesis;

[0030] Figure 4 is a schematic diagram of the connection component structure;

[0031] Figure 5 It is a schematic diagram of the structure of some components of the connection component;

[0032] Figure 6 It is a schematic diagram of the structure of the adjustment component;

[0033] Figure 7 It is a schematic diagram of the structure of some components of the adjustment component;

[0034] Figure 8 This is a schematic diagram of the cross-sectional structure of some components of the adjustment component.

[0035] [reference numerals]

[0036] 1. Implanting pad; 2. First mounting screw hole; 3. Mounting screw; 4. Second mounting screw hole; 5. Mounting lining; 6. Mounting bracket; 7. Connecting assembly; 71. First slide rail; 72. Slot; 73. Connecting arc plate; 74. Slide groove; 75. First telescopic rod; 76. Arc-shaped block; 77. Mounting nail hole; 78. Second arc-shaped slide groove; 79. Mounting plate; 8. Adjusting assembly; 81. Mounting base; 82. Mounting chamber; 83. Rotating rod; 84. First flat gear; 85. Second flat gear; 86. Block; 87. Elastic telescopic rod; 88. Rotating base; 89. Fixing plate; 810. Third mounting screw hole.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0038] The following is a detailed description of a 3D printed individualized combined acetabular bone defect reconstruction prosthesis and a preparation method thereof provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0039] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0040] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0041] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0042] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0043] like Figures 1 to 3 As shown, the embodiment of the present invention provides a 3D printed individualized combined acetabular bone defect reconstruction prosthesis and a preparation method thereof, comprising an implantation pad 1, wherein the bottom end of the implantation pad 1 is provided with a first mounting screw hole 2, the inner wall of the first mounting screw hole 2 is sleeved with a mounting screw 3, the inner wall of the implantation pad 1 is provided with a second mounting screw hole 4, the top end of the inner wall of the implantation pad 1 is provided with a mounting liner 5, the top end of the mounting liner 5 is provided with a mounting bracket 6, and the bottom end of the mounting bracket 6 is provided with an arc-shaped slide groove 61;

[0044] A connection component 7 is provided at the top edge of the implant pad 1, and the connection component 7 is used to connect the implant pad 1 and the acetabulum;

[0045] An adjustment component 8 is provided at one end of the mounting bracket 6, and the adjustment component 8 is used to adjust the mounting angle between the acetabulum bones.

[0046] By setting the connecting component 7, medical staff can selectively and repeatedly install multiple groups of connecting arc plates 73 according to the bone condition of the patient's acetabular bone defect, thereby improving the flexibility of the connecting arc plates 73 when fixing the patient's acetabular bone defect. By setting the adjusting component 8, the fit between the fixing plate 89 and the bone part around the patient's acetabular bone defect is improved, thereby improving the applicability of the fixing plate 89 when fixing the bone part around the patient's acetabular bone defect, and further improving the fixing effect of the fixing plate 89 on the bone part around the patient's acetabular bone defect, thereby ensuring stability during installation.

[0047] like Figures 4 to 5As shown, the connecting assembly 7 includes a first slide rail 71, which is arranged at the top of the implant pad 1, and slots 72 are arranged on both sides of the first slide rail 71. The number of the slots 72 is set to two groups, and the two groups of slots 72 are coaxially arranged on both sides of the first slide rail 71. A connecting arc plate 73 is arranged at the top of the first slide rail 71, and a slide groove 74 is arranged at the bottom of the connecting arc plate 73. The inner wall of the slide groove 74 contacts the top surface of the first slide rail 71, and a first telescopic rod 75 is arranged on one side of the inner wall of the slide groove 74. The first telescopic rod An arc-shaped block 76 is provided at one end of 75, and the arc-shaped block 76 is arranged at an equal angle on the inner wall of the slide groove 74. The surface of one end of the arc-shaped block 76 contacts the inner wall of the slot 72. The surface of the connecting arc plate 73 is provided with mounting nail holes 77, and the mounting nail holes 77 are arranged at an equal angle on the surface of the connecting arc plate 73. A second arc-shaped slide groove 78 is provided on one side of the outer surface of the connecting arc plate 73, and the surface of the second arc-shaped slide groove 78 contacts the surface of the arc-shaped slide groove 61. A mounting plate 79 is provided at the bottom edge of the connecting arc plate 73.

[0048] In this embodiment, the medical staff first places the implant block 1 at the acetabular bone defect of the patient, and provides a mounting screw 3 in the first mounting screw hole 2 at the bottom end of the implant block 1 to fix the implant block 1 at the acetabular bone defect of the patient;

[0049] The medical staff then aligns the slide groove 74 at the bottom of the connecting arc plate 73 with the first slide rail 71 and presses it. When the connecting arc plate 73 is pressed down by force, the connecting arc plate 73 drives the first telescopic rod 75 and the arc block 76 on the inner wall of the slide groove 74 to approach the first slide rail 71, and the arc block 76 contacts the surface of the first slide rail 71. Under the continuous downward pressure of the connecting arc plate 73, the first slide rail 71 squeezes one end of the arc block 76, and the arc block 76 is stressed and pushes the first telescopic rod 75 to retract. Under the continuous downward pressure of the connecting arc plate 73, one end of the arc block 76 approaches and enters the slot 72, and the first telescopic rod 75 extends and pushes one end of the arc block 76 to contact the slot 72. The inner walls of the groove 72 are in contact with each other, achieving a mutual clamping effect between the arc-shaped clamping block 76 and the groove 72. When the connecting arc plate 73 is pressed into place, the mounting plate 79 at the bottom edge of the connecting arc plate 73 is in contact with the second mounting screw hole 4. The medical staff can use the mounting screws 3 to achieve a threaded connection between the implanted pad 1 and the connecting arc plate 73. Similarly, the medical staff can selectively repeat the installation of multiple sets of connecting arc plates 73 according to the bone condition of the patient's acetabular bone defect. When the installation of multiple sets of connecting arc plates 73 is completed, the medical staff fix the connecting arc plates 73 to the patient's acetabular bone defect through the mounting nail holes 77 on the surface of the multiple sets of connecting arc plates 73.

[0050] By setting the cooperation between the first slide rail 71 and the slide groove 74, and utilizing the clamping effect between the arc-shaped clamping block 76 and the slot 72, and by arranging multiple groups of connecting arc plates 73 at equal angles at the top of the first slide rail 71, medical staff can selectively and repeatedly install multiple groups of connecting arc plates 73 according to the bone condition of the patient's acetabular bone defect, thereby improving the flexibility of the connecting arc plates 73 when fixing the patient's acetabular bone defect, and making the connecting arc plates 73 have a certain degree of scalability during installation, and can be adjusted and installed in real time according to the bone condition of the patient's acetabular bone defect.

[0051] like Figures 6 to 8 As shown, the adjustment component 8 includes a mounting base 81, one end of the mounting base 81 is arranged on one side of the mounting bracket 6, one end of the mounting base 81 is provided with a mounting chamber 82, one end of the mounting base 81 is provided with a rotating rod 83, the outer surface of the rotating rod 83 is in contact with the inner wall of the mounting chamber 82, the outer surface of the rotating rod 83 is sleeved with a first flat gear 84, one side of the first flat gear 84 is meshed with a second flat gear 85, the second flat gear 85 is arranged at an opening on one side of the mounting chamber 82, one end of the second flat gear 85 is provided with a clamping block 86, the clamping block 86 is arranged at the top of the mounting chamber 82, the bottom end of the clamping block 86 is provided with an elastic telescopic rod 87, the bottom end of the elastic telescopic rod 87 is elastically connected to the top of the mounting chamber 82, one end of the rotating rod 83 is provided with a rotating base 88, the inner wall of the rotating base 88 is damped and connected with a fixing plate 89, the top of the fixing plate 89 is penetrated with a third mounting screw hole 810, and the third mounting screw hole 810 is arranged in an array at the top of the fixing plate 89.

[0052] In this embodiment, after the connection assembly 7 is installed and fixed, the medical staff installs the installation liner 5 on the top of the inner wall of the implant pad 1, and installs the installation bracket 6 on the top of the installation liner 5, so that the arc-shaped slide groove 1 61 at the bottom end of the installation bracket 6 and the second arc-shaped slide groove 78 on the outer surface of the connecting arc plate 73 are mutually engaged, and according to the defect of the patient's acetabulum, the installation bracket 6 is rotated, and the installation bracket 6 is adjusted along the direction of the second arc-shaped slide groove 78 through the arc-shaped slide groove 1 61 at the bottom end, and the installation bracket 6 drives the installation base 81 on one side to complete the adjustment of the position of the fixing plate 89;

[0053] Then the medical staff rotates the second flat gear 85, and the second flat gear 85 contacts and pushes the block 86 when rotating. The block 86 is subjected to force and drives the elastic telescopic rod 87 to extend, and the second flat gear 85 meshes with the first flat gear 84 to rotate. The first flat gear 84 rotates in the installation chamber 82 and drives the rotating rod 83 to rotate synchronously. The rotating rod 83 rotates and drives the rotating base 88 to rotate synchronously, so as to adjust the horizontal angle of the fixed plate 89. When the angle of the fixed plate 89 is adjusted to the right position, the block 86 is reset under the elastic action of the elastic telescopic rod 87, and the second flat gear 85 is limited, so that the block 86 and the second flat gear 85 are restored to the clamping state;

[0054] The medical staff then pushes the fixing plate 89 so that the fixing plate 89 damping is close to the bone part around the patient's acetabulum. The medical staff then aligns the third mounting screw hole 810 at the top of the fixing plate 89 with the reserved screw hole in the bone part of the patient's acetabulum, and fixes the fixing plate 89 to the reserved screw hole in the bone part around the patient's acetabulum through screws, and fills a porous tantalum metal microporous structure at the bone bonding interface to simulate the trabecular structure, which has the functions of preventing reinfection, improving the long-term stability of the prosthesis, being more conducive to the growth and fusion of autologous bone, and increasing the stability of the overall structure, thereby completing the overall installation of the acetabulum bone defect reconstruction prosthesis.

[0055] By setting the cooperation between the clamping block 86 and the second flat gear 85, the rotation angle of the rotating base 88 can be adjusted, thereby realizing the synchronous adjustment of the angle of the fixing plate 89. At the same time, by adjusting the damping of the fixing plate 89, the angle adjustment of the fixing plate 89 in two directions can be realized, so that when the fixing plate 89 is used to fix the bone part around the acetabular bone defect of the patient, the fit between the fixing plate 89 and the bone part around the acetabular bone defect of the patient is improved, the applicability of the fixing plate 89 when fixing the bone part around the acetabular bone defect of the patient is improved, and at the same time, the fixing effect of the fixing plate 89 on the bone part around the acetabular bone defect of the patient is further improved, thereby ensuring stability during installation.

[0056] like Figures 1 to 3 As shown, the preparation method of the 3D printed individualized modular acetabular bone defect reconstruction prosthesis includes the following steps:

[0057] S1. Using a dedicated scanning device to collect model point cloud data of the patient's acetabulum, and creating a three-dimensional model of the acetabulum based on the obtained model point cloud data;

[0058] S2, using the obtained acetabulum three-dimensional model, using a 3D printing device to print a proportional acetabulum three-dimensional verification model of the patient, measuring and analyzing the patient's acetabulum, and reconstructing a three-dimensional model of the defective part of the patient's acetabulum;

[0059] S3. According to the bone condition of the patient's acetabulum, screw holes are reserved in the bone around the patient's acetabulum, the structural support topology of the 3D model of the acetabulum prosthesis is optimized, and then the finished product is 3D printed, and the surface of the acetabulum prosthesis obtained by 3D printing is smoothed;

[0060] S4. A three-dimensional model of an optimized integrated acetabular prosthesis was prepared based on 3D printing technology to obtain an integrated acetabular bone defect reconstruction prosthesis. When installing the prosthesis, a porous tantalum metal microporous structure was used at the bone bonding interface to simulate the trabecular structure.

[0061] According to the working principle provided by the present invention, the medical staff first places the implant pad 1 at the acetabular bone defect of the patient, and provides a mounting screw 3 in the first mounting screw hole 2 at the bottom end of the implant pad 1 to fix the implant pad 1 at the acetabular bone defect of the patient;

[0062] The medical staff then aligns the slide groove 74 at the bottom of the connecting arc plate 73 with the first slide rail 71 and presses it. When the connecting arc plate 73 is pressed down by force, the connecting arc plate 73 drives the first telescopic rod 75 and the arc block 76 on the inner wall of the slide groove 74 to approach the first slide rail 71, and the arc block 76 contacts the surface of the first slide rail 71. Under the continuous downward pressure of the connecting arc plate 73, the first slide rail 71 squeezes one end of the arc block 76, and the arc block 76 is stressed and pushes the first telescopic rod 75 to retract. Under the continuous downward pressure of the connecting arc plate 73, one end of the arc block 76 approaches and enters the slot 72, and the first telescopic rod 75 extends and pushes one end of the arc block 76 to contact the slot 72. The inner walls of the grooves 72 are in contact with each other, achieving a mutual clamping effect between the arc-shaped clamping block 76 and the slots 72. When the connecting arc plate 73 is pressed into place, the mounting plate 79 at the bottom edge of the connecting arc plate 73 is in contact with the second mounting screw hole 4. The medical staff can achieve a threaded connection between the implanted pad 1 and the connecting arc plate 73 by installing the screws 3. Similarly, the medical staff can selectively repeat the installation of multiple sets of connecting arc plates 73 according to the bone condition of the patient's acetabular bone defect. When the multiple sets of connecting arc plates 73 are installed, the medical staff fix the connecting arc plates 73 to the patient's acetabular bone defect through the mounting nail holes 77 on the surfaces of the multiple sets of connecting arc plates 73.

[0063] After the connection assembly 7 is installed and fixed, the medical staff installs the installation liner 5 on the top of the inner wall of the implant pad 1, and installs the installation bracket 6 on the top of the installation liner 5, so that the arc-shaped slide groove 1 61 at the bottom end of the installation bracket 6 and the second arc-shaped slide groove 78 on the outer surface of the connecting arc plate 73 are mutually engaged, and according to the defect of the patient's acetabulum, the installation bracket 6 is rotated, and the installation bracket 6 is adjusted in the direction of the second arc-shaped slide groove 78 through the arc-shaped slide groove 1 61 at the bottom end, and the installation bracket 6 drives the installation base 81 on one side to complete the adjustment of the position of the fixing plate 89;

[0064] Then the medical staff rotates the second flat gear 85, and the second flat gear 85 contacts and pushes the block 86 when rotating. The block 86 is subjected to force and drives the elastic telescopic rod 87 to extend, and the second flat gear 85 meshes with the first flat gear 84 to rotate. The first flat gear 84 rotates in the installation chamber 82 and drives the rotating rod 83 to rotate synchronously. The rotating rod 83 rotates and drives the rotating base 88 to rotate synchronously, so as to adjust the horizontal angle of the fixed plate 89. When the angle of the fixed plate 89 is adjusted to the right position, the block 86 is reset under the elastic action of the elastic telescopic rod 87, and the second flat gear 85 is limited, so that the block 86 and the second flat gear 85 are restored to the clamping state;

[0065] The medical staff then pushes the fixing plate 89 to bring the fixing plate 89 close to the bone part around the patient's acetabulum, and then aligns the third mounting screw hole 810 at the top of the fixing plate 89 with the reserved screw hole in the bone part of the patient's acetabulum, and fixes the fixing plate 89 to the reserved screw hole in the bone part around the patient's acetabulum with screws, and fills the porous tantalum metal microporous structure at the bone bonding interface to simulate the trabecular structure, thereby completing the overall installation of the acetabulum bone defect reconstruction prosthesis.

[0066] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A 3D printed individualized modular acetabular bone defect reconstruction prosthesis, characterized in that: It comprises an implantation pad, wherein a first mounting screw hole is provided through the bottom end of the implantation pad, a mounting screw is sleeved on the inner wall of the first mounting screw hole, a second mounting screw hole is provided on the inner wall of the implantation pad, a mounting liner is provided on the top end of the implantation pad, and a mounting bracket is provided on the top end of the mounting liner; Also included is a connection component, the top edge of the implant block is provided with a connection component, the connection component is used to connect the implant block and the acetabulum; An adjustment component is provided at one end of the mounting bracket, and the adjustment component is used to adjust the mounting angle between the acetabulum bones; The connecting assembly includes a first slide rail, the first slide rail is arranged at the top of the implant pad, and slots are arranged on both sides of the first slide rail. The number of the slots is set to two groups, and the two groups of slots are coaxially arranged on both sides of the first slide rail; The top of the first slide rail is provided with a connecting arc plate, the bottom of the connecting arc plate is provided with a slide groove, the inner wall of the slide groove is in contact with the top surface of the first slide rail, the outer surface of the connecting arc plate is provided with a second arc-shaped slide groove on one side, the bottom of the mounting bracket is provided with an arc-shaped slide groove 1, and the surface of the second arc-shaped slide groove is in contact with the surface of the arc-shaped slide groove 1; The adjustment assembly includes a mounting base, one end of which is arranged on one side of the mounting bracket, and one end of which is provided with a mounting chamber; A rotating rod is provided at one end of the mounting base, the outer surface of the rotating rod is in contact with the inner wall of the mounting chamber, a first flat gear is sleeved on the outer surface of the rotating rod, a second flat gear is meshed with one side of the first flat gear, and the second flat gear is provided at an opening on one side of the mounting chamber; A clamping block is disposed at one end of the second flat gear, the clamping block is disposed at the top of the installation chamber, an elastic telescopic rod is disposed at the bottom end of the clamping block, and the bottom end of the elastic telescopic rod is elastically connected to the top of the installation chamber; A rotating base is arranged at one end of the rotating rod, a fixing plate is connected to the inner wall of the rotating base in a damping manner, a third mounting screw hole is arranged through the top of the fixing plate, and the third mounting screw holes are arranged in an array at the top of the fixing plate.

2. The 3D printed individualized modular acetabular bone defect reconstruction prosthesis according to claim 1, characterized in that: A first telescopic rod is arranged on one side of the inner wall of the slide groove, and an arc-shaped clamping block is arranged at one end of the first telescopic rod. The arc-shaped clamping blocks are arranged at equal angles on the inner wall of the slide groove, and one end surface of the arc-shaped clamping block contacts the inner wall of the slot.

3. The 3D printed individualized modular acetabular bone defect reconstruction prosthesis according to claim 1, characterized in that: The surface of the connecting arc plate is provided with mounting nail holes, the mounting nail holes are arranged at equal angles on the surface of the connecting arc plate, and a mounting plate is provided at the bottom edge of the connecting arc plate.

4. The 3D printed individualized modular acetabular bone defect reconstruction prosthesis according to claim 1, characterized in that: The preparation method of the 3D printed individualized modular acetabular bone defect reconstruction prosthesis comprises the following steps: S1. Using a dedicated scanning device to collect model point cloud data of the patient's acetabulum, and creating a three-dimensional model of the acetabulum based on the obtained model point cloud data; S2, using the obtained acetabulum three-dimensional model, using a 3D printing device to print a proportional acetabulum three-dimensional verification model of the patient, measuring and analyzing the patient's acetabulum, and reconstructing a three-dimensional model of the defective part of the patient's acetabulum; S3. According to the bone condition of the patient's acetabulum, screw holes are reserved in the bone around the patient's acetabulum, the structural support topology of the 3D model of the acetabulum prosthesis is optimized, and then the finished product is 3D printed, and the surface of the acetabulum prosthesis obtained by 3D printing is smoothed; S4. A three-dimensional model of an optimized integrated acetabular prosthesis was prepared based on 3D printing technology to obtain an integrated acetabular bone defect reconstruction prosthesis. When installing the prosthesis, a porous tantalum metal microporous structure was used at the bone bonding interface to simulate the trabecular structure.

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