Customized system for patient-specific surgical implants for osteonecrosis of the femoral head based on 3D printing

Abstract

The present invention provides a patient-specific surgical implant customization system for femoral head necrosis based on 3D printing, which belongs to the field of medical surgery technology and includes: a CT scanner, a data acquisition component is provided on the front of the CT scanner, which is used to scan the femoral head necrosis site of the patient and obtain the patient's medical image data; an image processing component, connected to the data acquisition component, used to process the medical image data and construct a patient-specific implant model; a 3D printing component, connected to the image processing component, used to print out a patient-specific implant according to the implant model. Beneficial effect: The present invention constructs a patient-specific implant model based on the patient's medical image data, and uses 3D printing technology to print out a patient-specific implant according to the digital model. The specific implant can better adapt to the patient's anatomical structure, avoid the problem of incomplete filling during autologous bone compression bone grafting and tantalum rod implantation, and improve the repair effect.

Description

Technical Field

[0001] The present invention relates to the field of medical surgery technology, and in particular to a 3D printing-based customization system for patient-specific surgical implants for femoral head necrosis. Background Art

[0002] Femoral head necrosis is a common orthopedic disease, and its lesions often present irregular shapes. Therefore, after the lesion is debrided, the bone defect cavity formed also shows irregularity accordingly.

[0003] Traditional treatment methods usually involve taking autologous bone for compression and bone grafting. However, due to the irregularity of the bone defect cavity, the autologous bone is prone to break through the bone cavity boundary during the compression process, leading to catastrophic consequences such as fractures or further damage to bone tissue; and the amount of autologous bone is often limited, making it difficult to meet the repair needs of large-scale bone defects, which to some extent limits the scope of application of this method.

[0004] In order to overcome the limitations of autologous bone compression bone grafting, tantalum rods were introduced as an alternative. Tantalum rods are relatively standardized and have certain strength and stability, which can support the bone defect area to a certain extent. However, tantalum rods may have incomplete filling problems when implanted, resulting in reduced repair effects in the bone defect area and even affecting the normal growth of bone tissue, thereby affecting the patient's recovery process. Moreover, standardized tantalum rods are difficult to meet the personalized anatomical needs of patients. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a patient-specific surgical implant customization system for femoral head necrosis based on 3D printing.

[0006] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0007] A 3D-printed patient-specific surgical implant customization system for femoral head necrosis, comprising:

[0008] A CT scanner, wherein a data acquisition component is provided on the front of the CT scanner, and is used to scan the femoral head necrosis of the patient and obtain the medical imaging data of the patient;

[0009] An image processing component, connected to the data acquisition component, for processing the medical image data to construct a patient-specific implant model;

[0010] A 3D printing component is connected to the image processing component and is used to print a patient-specific implant based on the implant model.

[0011] Preferably, the data acquisition component comprises:

[0012] A scanning port, the scanning port being opened on the front side of the CT scanner;

[0013] A scanning bed, wherein the scanning bed is fixedly connected to a base through a fixing plate, and the base is arranged on the front side of the CT scanner;

[0014] A support pad, which is movably connected to the top of the scanning bed through a sliding assembly, and is used to carry the femoral head necrosis part of the patient, and slide along the scanning bed to the scanning port for scanning to obtain a scanning result;

[0015] A control button movably connected to the front of the CT scanner;

[0016] The data collector is fixedly connected to the front of the CT scanner and is used to obtain the medical imaging data of the patient according to the scanning result.

[0017] Preferably, the sliding assembly comprises:

[0018] A slide groove, wherein the slide groove is provided on both sides of the scanning bed;

[0019] A sliding block is fixedly connected to two sides of the support pad and slidably connected to the inner wall of the sliding groove.

[0020] Preferably, a carrying block is provided on the support pad, and the carrying block is fixedly connected to the top of the support pad on a side away from the scanning port.

[0021] Preferably, it also includes:

[0022] A support plate, the support plate being arranged on one side of the CT scanner, the bottom of the support plate being fixedly connected to a support leg, the bottom of the support leg being fixedly connected to a fixed block;

[0023] Wherein, the image processing component and the 3D printing component are arranged on the top of the support plate.

[0024] Preferably, the image processing component comprises:

[0025] A first processing module, used for preprocessing the medical image data and obtaining preprocessed medical image data;

[0026] A second processing module, connected to the first processing module, for performing three-dimensional reconstruction on the pre-processed medical image data to obtain a three-dimensional CT model;

[0027] The third processing module is connected to the second processing module and is used to separate the three-dimensional femoral head necrosis area from the three-dimensional CT model and construct a patient-specific implant model based on the separated three-dimensional femoral head necrosis area.

[0028] Preferably, the image processing component further includes:

[0029] A fourth processing module is used to perform horizontal slicing processing on the implant model to divide it into a plurality of thin layers, and determine model data of each thin layer;

[0030] The fifth processing module is connected to the fourth processing module and is used to plan a printing path according to the model data of each thin layer, and transmit the planned printing path to the 3D printing component.

[0031] Preferably, it also includes:

[0032] A connecting line, one end of which is fixedly connected to the bottom of the computer, and the other end of which is fixedly connected to the inside of the printing box;

[0033] A cable organizer is fixedly connected to the top of the support plate, and the side surface of the connecting line is movably connected to the inner wall of the cable organizer.

[0034] Preferably, the 3D printing assembly comprises:

[0035] A printing box, wherein a printing platform is fixedly connected to the bottom of the printing box, and a movable slot is provided inside the printing box;

[0036] A movable seat, wherein a sliding block is movably connected to a side surface of the movable seat, the sliding block is slidably connected to an inner wall of the movable groove, the movable seat moves left and right along the sliding block, and the sliding block moves forward and backward along the movable groove;

[0037] A telescopic rod, the telescopic rod is fixedly connected to the bottom of the moving seat;

[0038] The print head is fixedly connected to the bottom of the telescopic rod and is located above the printing platform.

[0039] Preferably, the 3D printing component further comprises:

[0040] A box door, the box door being movably connected to the front side of the printing box;

[0041] An observation window, the observation window is fixedly connected to the front side of the box door;

[0042] A switch button is movably connected to the front side of the printing box.

[0043] The advantages or beneficial effects of the technical solution of the present invention are:

[0044] The present invention integrates data acquisition components, image processing components and 3D printing components, builds a patient-specific implant model based on the patient's medical imaging data, and uses 3D printing technology to print out the patient-specific implant according to the digital model. The specific implant can better adapt to the patient's anatomical structure, avoid the problem of incomplete filling during autologous bone compression bone grafting and tantalum rod implantation, and improve the repair effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a structural block diagram of a system for customizing a femoral head necrosis patient-specific surgical implant based on 3D printing in a preferred embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of the overall structure of the device in a preferred embodiment of the present invention;

[0047] Figure 3 In a preferred embodiment of the present invention, Figure 2 The enlarged structural diagram at A in the middle;

[0048] Figure 4 A schematic diagram of a partial structure of an image processing component in a preferred embodiment of the present invention;

[0049] Figure 5 A structural block diagram of an image processing component in a preferred embodiment of the present invention;

[0050] Figure 6 A structural block diagram of an image processing component in a preferred embodiment of the present invention;

[0051] Figure 7 In a preferred embodiment of the present invention, Figure 4 The enlarged structural diagram at B in the middle;

[0052] Figure 8 A schematic diagram of a partial structure of a 3D printing component in a preferred embodiment of the present invention;

[0053] Fig. 9 This is a schematic diagram of the partial structure inside the 3D printing component in a preferred embodiment of the present invention.

[0054] Description of reference numerals:

[0055] 1. CT scanner; 2. data acquisition component; 3. image processing component; 4. 3D printing component; 5. support leg; 6. fixed block; 7. connecting wire; 8. cable organizer; 201. base; 202. fixed plate; 203. scanning bed; 204. support pad; 205. slide; 206. slider; 207. hand block; 208. scanning port; 209. control button; 210. data acquisition device; 301. support plate; 302. fixed seat; 303. computer; 304. display screen; 305. operating keyboard; 401. printing box; 402. movable slot; 403. sliding block; 404. moving seat; 405. telescopic rod; 406. print head; 407. printing platform; 408. box door; 409. observation window; 410. switch button. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0058] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0059] In a preferred embodiment of the present invention, based on the above-mentioned problems existing in the prior art, a 3D-printed customized surgical implant system for patients with femoral head necrosis is provided. Figure 1 As shown, including:

[0060] A CT scanner 1, a data acquisition component 2 is provided on the front of the CT scanner 1, which is used to scan the femoral head necrosis part of the patient and obtain the medical imaging data of the patient;

[0061] An image processing component 3, connected to the data acquisition component 2, is used to process the medical image data and construct a patient-specific implant model;

[0062] The 3D printing component 4 is connected to the image processing component 3 and is used to print out a patient-specific implant based on the implant model.

[0063] Specifically, although the existing tantalum rods can support the bone defect area to a certain extent and overcome the limitations of autologous bone compression bone grafting, the tantalum rods will have the problem of incomplete filling when implanted, affecting the normal growth of bone tissue, resulting in a decrease in the repair effect of the bone defect area; and the standardized tantalum rods are difficult to meet the patient's specific anatomical structure needs.

[0064] In this embodiment, by integrating the data acquisition component 2, the image processing component 3 and the 3D printing component 4, a patient-specific implant model is constructed based on the patient's medical imaging data, and the patient-specific implant is printed out according to the digital model using 3D printing technology. The specific implant can better adapt to the patient's anatomical structure, avoid the problem of incomplete filling during autologous bone compression grafting and tantalum rod implantation, and improve the repair effect.

[0065] Femoral head necrosis refers to the area where blood circulation in the femoral head is impaired due to various reasons (such as trauma, long-term use of hormones, alcoholism, etc.), which in turn causes bone cell death and bone destruction. This area usually manifests as pathological changes such as reduced bone density, trabecular fracture, and femoral head collapse, which seriously affect the patient's joint function and quality of life.

[0066] Since the lesions of femoral head necrosis usually involve the bone and bone marrow area, in order to achieve better examination results, CT imaging is usually used to examine this area.

[0067] When the patient-specific surgical implant customization system for femoral head necrosis based on 3D printing shown in the present invention is used for treatment, the data acquisition component 2 is started, and high-precision X-ray tomography technology is used to perform a full-range, multi-level scan of the patient's femoral head necrosis area to capture subtle structural changes in the bone, including the shape, size and condition of the necrotic area and surrounding tissue, thereby generating high-quality medical imaging data.

[0068] After the scan is completed, the boundaries and scope of the necrotic site are further determined through in-depth analysis of the medical imaging data. At the same time, the individual differences and anatomical characteristics of the patients, such as the curvature of the femoral neck and the size of the medullary cavity, are taken into consideration to construct a three-dimensional implant model that completely matches the patient's femoral head necrosis site. This three-dimensional digital model is used to guide the 3D printing process to ensure that the printed implant can perfectly adapt to the patient's anatomical structure.

[0069] According to the implant model, the 3D printing component 4 uses 3D printing technology to print out the implant according to the implant model based on suitable biocompatible materials (such as titanium alloy, tantalum alloy or bioactive ceramics, etc.), and performs corresponding post-processing, such as removing support structures, surface polishing, disinfection, etc., to ensure that the final printed implant perfectly fits the patient's anatomical structure and has good mechanical properties and biological activity.

[0070] Finally, the specific implant made by 3D printing technology will be implanted into the necrotic part of the patient's femoral head to provide the necessary support and repair function. This implant can closely fit the shape and size of the necrotic area, and has good mechanical properties and biocompatibility, which helps promote the regeneration and repair of bone tissue and restore the normal function of the joint.

[0071] As a preferred embodiment, wherein Figure 2 and Figure 3 As shown, the data acquisition component 2 includes:

[0072] A scanning port 208 , which is provided on the front side of the CT scanner 1 ;

[0073] A scanning bed 203, wherein the scanning bed 203 is fixedly connected to the base 201 via a fixing plate 202, and the base 201 is arranged at the front of the CT scanner 1;

[0074] The support pad 204 is movably connected to the top of the scanning bed 203 through a sliding assembly, and is used to support the femoral head necrosis part of the patient, and slide along the scanning bed 203 to the scanning port 208 for scanning to obtain the scanning result;

[0075] A control button 209, movably connected to the front of the CT scanner 1;

[0076] The data collector 210 is fixedly connected to the front of the CT scanner 1 and is used to obtain the medical imaging data of the patient according to the scanning results.

[0077] Specifically, a data acquisition component 2 is disposed on the front of the CT scanner 1 . The data acquisition component 2 includes a base 201 . The base 201 is disposed on the front of the CT scanner 1 to provide support for the entire component.

[0078] A fixing plate 202 is fixedly connected to the top of the base 201 , and a scanning bed 203 is fixedly connected to the top of the fixing plate 202 . The scanning bed 203 is used to carry the patient with the necrotic part of the femoral head facing upward.

[0079] In order to ensure the comfort and stability of the patient during the scanning process, a support pad 204 is movably connected to the top of the scanning bed 203. The support pad 204 is movably connected relative to the scanning bed 203 and is used to move along the direction of the slide 205 toward the scanning port 208 to place the femoral head necrosis part within the scanning range of the CT scanner 1.

[0080] The front of the CT scanner 1 is movably connected with a control button 209. By operating the control button 209, various functions of the CT scanner can be controlled, such as starting scanning, adjusting scanning parameters, terminating scanning, etc. For example, when the support pad 204 carries the femoral head necrosis part of the patient and slides into the scanning port 208, the CT scanner 1 can be started to scan by pressing the control button 209.

[0081] A data collector 210 is fixedly connected to the front of the CT scanner 1. The data collector 210 is used to receive and process the original scan results from the scanner. During the scanning process, the data collector 210 will capture and store the patient's medical image data in real time.

[0082] As a preferred embodiment, wherein Figure 3 As shown, the sliding assembly includes:

[0083] Slide slots 205, which are provided on both sides of the scanning bed 203;

[0084] The slider 206 is fixedly connected to both sides of the support pad 204 , and the slider 206 is slidably connected to the inner wall of the slide groove 205 .

[0085] Specifically, in this embodiment, slide grooves 205 are opened on both sides of the scanning bed 203, and sliders 206 matching the slide grooves 205 are fixedly connected on both sides of the support pad 204. Through the cooperation of the slide grooves 205 and the sliders 206, the support pad 204 can slide smoothly along the scanning bed 203, thereby moving the patient's femoral head necrosis area into the scanning range of the scanning port 208, ensuring the accuracy of the scanning.

[0086] As a preferred embodiment, wherein Figure 3 As shown, a carrying block 207 is provided on the support pad 204 , and the carrying block 207 is fixedly connected to the top of the support pad 204 away from the scanning port 208 .

[0087] Specifically, in this embodiment, by providing a hand-held block 207 on the support pad 204, the support pad 204 can be easily moved to adjust the position of the patient so that the necrotic part of the femoral head is completely within the scanning range of the CT scanner.

[0088] As a preferred embodiment, wherein Figure 4 As shown, it also includes:

[0089] A support plate 301, which is disposed on one side of the CT scanner 1, wherein a support leg 5 is fixedly connected to the bottom of the support plate 301, and a fixing block 6 is fixedly connected to the bottom of the support leg 5;

[0090] The image processing component 3 and the 3D printing component 4 are arranged on the top of the support plate 301 .

[0091] Specifically, in this embodiment, by installing the support legs 5, the support legs 5 can be used to support the computer 303 and the printing box 401 on the support plate 301, thereby facilitating the operation of medical personnel and avoiding unexpected situations during use.

[0092] Further, such as Figure 4 As shown, the image processing component 3 also includes:

[0093] A fixing seat 302, the fixing seat 302 is fixedly connected to the top of the supporting plate 301;

[0094] A computer 303, which is fixedly connected to the top of the fixing base 302;

[0095] Display screen 304, display screen 304 is fixedly connected to the front of computer 303;

[0096] Operation keyboard 305, which is movably connected to the top of the support plate 301

[0097] Specifically, in this embodiment, the top of the support plate 301 is fixedly connected to a fixing base 302, the top of the fixing base 302 is fixedly connected to a computer 303, the front of the computer 303 is fixedly connected to a display screen 304, and the top of the support plate 301 is movably connected to an operating keyboard 305. By installing the image processing component 3, the computer 303 can be used to process the collected medical image data to generate a three-dimensional model, and then according to the three-dimensional model, a patient-specific implant model can be constructed using the computer 303 auxiliary design software.

[0098] As a preferred embodiment, wherein Figure 5 As shown, the image processing component 3 includes:

[0099] The first processing module 31 is used to pre-process the medical image data and obtain the pre-processed medical image data;

[0100] The second processing module 32 is connected to the first processing module 31 and is used to perform three-dimensional reconstruction on the pre-processed medical image data to obtain a three-dimensional CT model;

[0101] The third processing module 33 is connected to the second processing module 32, and is used to separate the three-dimensional femoral head necrosis area from the three-dimensional CT model, and construct a patient-specific implant model based on the separated three-dimensional femoral head necrosis area.

[0102] Specifically, in this embodiment, first, the medical image data is preprocessed by the first processing module 31, and the preprocessing includes but is not limited to image denoising, image enhancement, image registration, etc. For example, the noise in the image is removed by a filter to improve the image quality; then, the details in the image are made clearer by image enhancement techniques such as contrast adjustment and brightness adjustment. Finally, multiple images obtained by all-round and multi-level scanning are registered to ensure that they are in the same spatial coordinate system.

[0103] Next, the second processing module 32 performs three-dimensional reconstruction, such as surface reconstruction, volume rendering, etc., based on the pre-processed medical image data to convert the two-dimensional medical image data into a three-dimensional CT model. During the reconstruction process, a three-dimensional model is generated based on the grayscale value, edge information, etc. in the image.

[0104] Then, the third processing module 33 receives the three-dimensional CT model and uses image segmentation techniques, such as threshold segmentation, region growing, edge detection, etc., combined with medical knowledge and experience, to separate the three-dimensional femoral head necrosis area from the three-dimensional CT model.

[0105] Subsequently, a patient-specific implant model is constructed based on the isolated three-dimensional femoral head necrosis area to ensure the matching and adaptability of the implant to the patient's bone.

[0106] As a preferred embodiment, wherein Figure 6 As shown, the image processing component 3 also includes:

[0107] The fourth processing module 34 is used to perform horizontal slicing processing on the implant model to divide it into multiple thin layers and determine the model data of each thin layer;

[0108] The fifth processing module 35 is connected to the fourth processing module 34 and is used to plan a printing path according to the model data of each thin layer, and transmit the planned printing path to the 3D printing component.

[0109] Specifically, in this embodiment, the fourth processing module 34 performs horizontal slicing processing on the implant model to decompose the complex implant model into a series of ordered thin layers, and each layer retains the detailed data of the original model at that height.

[0110] Each thin layer represents a cross section of the original model at that height. The thin layer model data includes the geometric shape information, size and thickness information of the corresponding cross section. The geometric shape is usually represented in the form of point cloud, polygonal mesh or vector graphics, which defines the outline of the thin layer boundary and the internal geometric features, such as bumps, curves, etc. The size is the cross-sectional area covered by the thin layer, and the thickness is the distance between two adjacent layers.

[0111] The fourth processing module 34 may be preset with layer thickness parameters to evenly divide the model into a series of thin layers of equal thickness. The uniform layering method is conducive to reducing the variables in the printing process, so that the printing quality of each layer and the inter-layer bonding strength can be kept relatively stable.

[0112] The thickness of different thin layers can be the same or different. For example, in areas with large curvature or rich details of the model, a thinner layer thickness can be selected to capture more details; while in relatively flat areas or areas that do not require high precision, a thicker layer thickness can be selected to improve printing efficiency. For another example, adjacent thin layers with the same thin layer model data can be merged.

[0113] When printing implants with complex surfaces or fine structures, using gradually changing thin layer thickness can better capture the details of the model and improve printing accuracy; at the same time, by adjusting the layer thickness in different areas, the overall strength and stiffness distribution of the implant can be optimized to meet specific mechanical performance requirements.

[0114] Then, the fifth processing module 35 receives the thin layer model data from it, and plans the optimal printing path in combination with the characteristics of the 3D printing technology, such as the moving range of the print head, the printing speed, the extrusion amount of the printing material, etc.

[0115] In path planning, the printing parameters can also be adjusted based on information about material properties, such as material type, density, elastic modulus, etc.

[0116] Furthermore, the image processing component 3 can also use the three-dimensional CT model and the separated three-dimensional femoral head necrosis area to determine the shape, size, position and relative relationship of the femoral head necrosis area with the surrounding healthy bone tissue, and at the same time plan the optimal surgical path and operation steps based on the patient's specific conditions, such as age, gender, bone quality and other individual differences.

[0117] The image processing component 3 is a computer device equipped with a specific software algorithm to implement the functions of the first to fifth processing modules.

[0118] As a preferred embodiment, wherein Figure 7 As shown, it also includes:

[0119] A connecting line 7, one end of which is fixedly connected to the bottom of the computer 303, and the other end of which is fixedly connected to the inside of the printing box;

[0120] The cable organizer 8 is fixedly connected to the top of the support plate 301 and is used to flexibly connect the side surface of the connecting line 7 to the inner wall of the cable organizer 8 .

[0121] Specifically, in the present embodiment, a connecting wire 7 is fixedly connected to the bottom of the computer 303, the other end of the connecting wire 7 is fixedly connected to the interior of the printing box 401, a cable organizer 8 is fixedly connected to the top of the support plate 301, and the side surface of the connecting wire 7 is movably connected to the inner wall of the cable organizer 8. The connecting wire 7 can be effectively organized through the cable organizer 8, avoiding the wires from being scattered around in a disorderly manner, making the entire system look more tidy and orderly, and reducing equipment failures caused by loose or entangled wires.

[0122] As a preferred embodiment, wherein Figure 8 and Fig. 9 As shown, the 3D printing component 4 includes:

[0123] A printing box 401, a printing platform 407 is fixedly connected to the bottom of the printing box 401, and a movable slot 402 is opened inside the printing box 401;

[0124] A movable seat 404, a side surface of the movable seat 404 is movably connected with a sliding block 403, the sliding block 403 is slidably connected to the inner wall of the movable groove 402, the movable seat 404 moves left and right along the sliding block 403, and the sliding block 403 moves forward and backward along the movable groove 402;

[0125] A telescopic rod 405, the telescopic rod 405 is fixedly connected to the bottom of the moving base 404;

[0126] The print head is fixedly connected to the bottom of the telescopic rod 405 and is located above the printing platform 407 .

[0127] Specifically, in this embodiment, a 3D printing component 4 is provided on the top of the support plate 301. By installing the 3D printing component 4, after a patient-specific implant model is constructed on the computer 303, the patient-specific implant can be printed out according to the digital model using 3D printing technology.

[0128] The 3D printing assembly 4 includes a printing box 401, which is fixedly connected to the top of the support plate 301. A movable groove 402 is provided inside the printing box 401. A sliding block 403 is slidably connected to the inner wall of the movable groove 402. A moving seat 404 is movably connected to the side surface of the sliding block 403. The moving seat 404 can move left and right in the horizontal direction through the cooperation between the moving seat 404 and the sliding block 403; at the same time, the moving seat 404 can move forward and backward in the horizontal direction through the cooperation between the movable groove 402 and the sliding block 403.

[0129] In addition, a telescopic rod 405 is fixedly connected to the bottom of the movable base 404, and a print head 406 is fixedly connected to the bottom of the telescopic rod 405, so that the print head 406 can freely adjust its height in the vertical direction to meet the printing requirements of different thicknesses and shapes. The multi-directional movement capability not only improves the flexibility of printing, but also further enhances the printing accuracy, ensuring that the size and shape of the printed implant are highly consistent with the patient model.

[0130] A printing platform 407 is fixedly connected to the interior of the printing box 401 to provide a stable support for the printing process.

[0131] As a preferred embodiment, wherein Figure 8 As shown, the 3D printed components also include:

[0132] A box door 408, which is movably connected to the front side of the printing box 401;

[0133] Observation window 409, which is fixedly connected to the front of the box door 408;

[0134] The switch button 410 is movably connected to the front side of the printing box 401 .

[0135] Specifically, in this embodiment, a box door 408 is movably connected to the front of the printing box 401 to protect the equipment and materials during the printing process from external interference and ensure the safety of the operation.

[0136] An observation window 409 is fixedly connected to the front of the box door 408. Through the observation window 409, when printing the patient-specific implant, the situation inside the printing box 401 can be directly observed through the observation window 409, without frequently opening the box door, thereby reducing interruptions and interferences during the printing process. In particular, when printing patient-specific implants, the real-time observation function of the observation window can ensure the accuracy and reliability of the printing process.

[0137] The front of the printing box 401 is movably connected with a switch button 410, which provides an intuitive operation interface for the user. The user only needs to press a button to control the opening and closing of the printing box, which is easy and quick to operate.

[0138] The 3D-printed custom-made surgical implant system for patients with osteonecrosis of the femoral head works as follows:

[0139] When in use, the patient is first placed on the support pad 204 with the necrotic part of the femoral head facing upwards, and then the support pad 204 is pushed into the scanning port 208 using the slider 206 in the slide groove 205, and the necrotic part of the femoral head of the patient is scanned using the CT scanner 1, thereby obtaining the patient's medical image data; then, the collected medical image data is processed using the computer 303 to generate a three-dimensional model, and then a patient-specific implant model is constructed based on the three-dimensional model using the computer 303 aided design software; after the computer 303 constructs the patient-specific implant model, the patient-specific implant is printed out based on the digital model using 3D printing technology, and at the same time, the optimal surgical path and operation steps are planned in combination with the patient's specific conditions.

[0140] The advantages or beneficial effects of adopting the above technical solution are: the present invention integrates data acquisition components, image processing components and 3D printing components, builds a patient-specific implant model based on the patient's medical imaging data, and uses 3D printing technology to print out patient-specific implants based on the digital model. The specific implant can better adapt to the patient's anatomical structure, avoid the problem of incomplete filling during autologous bone compression bone grafting and tantalum rod implantation, and improve the repair effect.

[0141] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. A 3D-printed patient-specific surgical implant customization system for femoral head necrosis, characterized in that: include: A CT scanner, wherein a data acquisition component is provided on the front of the CT scanner, and is used to scan the femoral head necrosis of the patient and obtain the medical imaging data of the patient; An image processing component, connected to the data acquisition component, for processing the medical image data to construct a patient-specific implant model; A 3D printing component is connected to the image processing component and is used to print a patient-specific implant based on the implant model.

2. The 3D printing-based customized surgical implant system for patients with femoral head necrosis according to claim 1 is characterized in that: The data acquisition component includes: A scanning port, the scanning port being opened on the front side of the CT scanner; A scanning bed, wherein the scanning bed is fixedly connected to a base through a fixing plate, and the base is arranged on the front side of the CT scanner; A support pad, which is movably connected to the top of the scanning bed through a sliding assembly, and is used to carry the femoral head necrosis part of the patient, and slide along the scanning bed to the scanning port for scanning to obtain a scanning result; A control button movably connected to the front of the CT scanner; The data collector is fixedly connected to the front of the CT scanner and is used to obtain the medical imaging data of the patient according to the scanning result.

3. The 3D printing-based customized surgical implant system for patients with femoral head necrosis according to claim 2 is characterized in that: The sliding assembly comprises: A slide groove, wherein the slide groove is provided on both sides of the scanning bed; A sliding block is fixedly connected to two sides of the support pad and slidably connected to the inner wall of the sliding groove.

4. The 3D printing-based custom system for femoral head necrosis patient-specific surgical implants according to claim 2, characterized in that: A carrying block is provided on the support pad, and the carrying block is fixedly connected to the top of the support pad on a side away from the scanning port.

5. The 3D printing-based custom system for femoral head necrosis patient-specific surgical implants according to claim 1, characterized in that: Also includes: A support plate, the support plate being arranged on one side of the CT scanner, the bottom of the support plate being fixedly connected to a support leg, the bottom of the support leg being fixedly connected to a fixed block; Wherein, the image processing component and the 3D printing component are arranged on the top of the support plate.

6. The 3D printing-based custom system for femoral head necrosis patient-specific surgical implants according to claim 1, characterized in that: The image processing component includes: A first processing module, used for preprocessing the medical image data and obtaining preprocessed medical image data; A second processing module, connected to the first processing module, for performing three-dimensional reconstruction on the pre-processed medical image data to obtain a three-dimensional CT model; The third processing module is connected to the second processing module and is used to separate the three-dimensional femoral head necrosis area from the three-dimensional CT model and construct a patient-specific implant model based on the separated three-dimensional femoral head necrosis area.

7. The 3D printing-based custom system for femoral head necrosis patient-specific surgical implants according to claim 1, characterized in that: The image processing component also includes: A fourth processing module is used to perform horizontal slicing processing on the implant model to divide it into a plurality of thin layers, and determine model data of each thin layer; The fifth processing module is connected to the fourth processing module and is used to plan a printing path according to the model data of each thin layer, and transmit the planned printing path to the 3D printing component.

8. The 3D printing-based custom system for femoral head necrosis patient-specific surgical implants according to claim 1, characterized in that: Also includes: A connecting line, one end of which is fixedly connected to the bottom of the computer, and the other end of which is fixedly connected to the inside of the printing box; A cable organizer is fixedly connected to the top of the support plate and is used to flexibly connect the side surface of the connecting line to the inner wall of the cable organizer.

9. The 3D printing-based custom system for femoral head necrosis patient-specific surgical implants according to claim 1, characterized in that: The 3D printing assembly includes: A printing box, wherein a printing platform is fixedly connected to the bottom of the printing box, and a movable slot is provided inside the printing box; A movable seat, wherein a sliding block is movably connected to a side surface of the movable seat, the sliding block is slidably connected to the inner wall of the movable groove, the movable seat moves left and right along the sliding block, and the sliding block moves forward and backward along the movable groove; A telescopic rod, the telescopic rod is fixedly connected to the bottom of the moving seat; The print head is fixedly connected to the bottom of the telescopic rod and is located above the printing platform.

10. The 3D printing-based custom-made surgical implant system for patients with femoral head necrosis according to claim 9, characterized in that: The 3D printing assembly also includes: A box door, the box door being movably connected to the front side of the printing box; An observation window, the observation window is fixedly connected to the front side of the box door; A switch button is movably connected to the front side of the printing box.

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