Fusion cage for lumbar zygapophyseal joint

Abstract

The invention provides a fusion cage for a lumbar zygapophyseal joint, the fusion cage for the lumbar zygapophyseal joint comprises a fusion cage main body and a fixed guide plate, and the fusion cage main body and the fixed guide plate are integrally formed. According to the technical scheme, a surgical treatment scheme can be provided for diseases such as lumbar zygapophyseal joint severe osteoarthritis and zygapophyseal joint instability in the clinical orthopedic spine surgery, and the problems that according to an existing clinical zygapophyseal joint fusion scheme, surgical implantation needs to be opened, surgical injuries are large, recovery time is long, and the risk of surgical complications is high are solved.

Description

Background Art

[0002] Lumbar facet joint fusion is a disease of abnormal development of the lumbar facet joints, which can lead to a series of symptoms such as disc degeneration, lumbar joint mutation osteoarthrosis, such as low back pain, stiffness, and limited movement. Traditional treatments include conservative treatment, drug therapy, traction therapy, injection therapy, and surgical treatment. However, these treatments have problems such as limited treatment effects, long recovery time, or high surgical risks. Summary of the invention

[0003] The present application provides a fusion device for lumbar facet joints, which is used to solve the problems of poor lumbar facet joint fusion effect, long recovery time or high surgical risk.

[0004] The present application provides a fusion device for lumbar facet joints, comprising: a fusion device body and a fixing guide plate, wherein:

[0005] The fusion device body and the fixing guide plate are integrally formed.

[0006] In the above technical scheme, by providing a fusion device body and a fixed guide plate, the fusion device body and the fixed guide plate are integrally formed; it can provide a surgical treatment plan for diseases such as severe osteoarthritis of the lumbar facet joints and facet joint instability in clinical orthopedic spinal surgery, and solve the problems of existing clinical facet joint fusion plans, which require open surgery for implantation, have large surgical injuries, long recovery time, and high risk of surgical complications.

[0007] In a specific embodiment, the fixed guide plate includes a first fixed guide plate and a second fixed guide plate, wherein:

[0008] The first fixed guide plate and the second fixed guide plate are arranged on both sides of the fusion device body in the thickness direction, and the first fixed guide plate and the second fixed guide plate are arranged alternately.

[0009] In a specific implementation scheme, a bone grafting groove and a developing wire installation groove are provided in the thickness direction of the fusion device body, wherein:

[0010] The bone grafting groove and the developing wire installation groove are arranged side by side.

[0011] In a specific implementation manner, a developing wire is arranged in the developing wire installation groove.

[0012] In a specific implementation manner, both end surfaces of the fusion device body in the thickness direction of the vertebral body are provided with anti-slip protrusions.

[0013] In a specific implementation manner, the anti-slip protrusion includes an anti-slip groove and a clamping head arranged in the anti-slip groove, wherein:

[0014] An elastic body is arranged between the clamping head and the anti-slip groove.

[0015] In a specific implementation manner, a titanium alloy spray layer is provided on the anti-skid groove, and the titanium alloy spray layer is sealed and connected to the anti-skid groove.

[0016] In a specific embodiment, the elastomer is a bioelastomer.

[0017] In a specific implementation manner, the fusion device body and the fixed guide plate are integrally formed by 3D printing.

[0018] In a specific implementation manner, the fusion device body and the fixing guide plate are made of medical titanium alloy material. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a fusion device for lumbar facet joints provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 Left view of;

[0021] Figure 3 for Figure 1 A top view of

[0022] Figure 4 A schematic diagram of the structure of the anti-slip protrusion provided in an embodiment of the present application.

[0023] Among them, 1-fusion device body, 2-first fixing guide plate, 3-second fixing guide plate, 4-bone grafting groove, 5-developing wire installation groove, 6-anti-slip protrusion, 7-anti-slip groove, 8-clamp, 9-elastomer, 10-titanium alloy spray layer, 11-screw installation hole. DETAILED DESCRIPTION

[0024] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0025] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0026] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0027] To facilitate understanding of the lumbar facet joint fusion device provided in the embodiment of the present application, its application scenario is first explained. The lumbar facet joint fusion device provided in the embodiment of the present application is used to solve the problems of poor effect, long recovery time or high surgical risk of lumbar facet joint fusion. Lumbar facet joint fusion is a disease of abnormal development of the lumbar facets, which can lead to a series of symptoms such as intervertebral disc degeneration, lumbar joint mutation osteoarthrosis, such as low back pain, stiffness, limited movement, etc. Traditional treatment methods include conservative treatment, drug therapy, traction therapy, injection therapy and surgical treatment. However, these treatment methods have problems such as limited treatment effect, long recovery time or high surgical risk. For this reason, the embodiment of the present application provides a lumbar facet joint fusion device to solve the problems of poor effect, long recovery time or high surgical risk of lumbar facet joint fusion. The following is a detailed description of the embodiments in conjunction with specific drawings.

[0028] refer to Figures 1 to 4 , Figure 1 A schematic diagram of the structure of a fusion device for lumbar facet joints provided in an embodiment of the present application; Figure 2 for Figure 1 Left view of; Figure 3 for Figure 1 A top view of Figure 4 A schematic diagram of the structure of the anti-slip protrusion provided in an embodiment of the present application.

[0029] exist Figures 1 to 4 The present application provides a fusion device for lumbar facet joints, comprising: a fusion device body 1 and a fixing guide plate, wherein:

[0030] The fusion device body and the fixing guide plate are integrally formed.

[0031] In the above technical scheme, by providing a fusion device body and a fixed guide plate, the fusion device body and the fixed guide plate are integrally formed; it can provide a surgical treatment plan for diseases such as severe osteoarthritis of the lumbar facet joints and facet joint instability in clinical orthopedic spinal surgery, and solve the problems of existing clinical facet joint fusion plans, which require open surgery for implantation, have large surgical injuries, long recovery time, and high risk of surgical complications.

[0032] Specifically, the fusion device for lumbar facet joints includes a fusion device body and a fixed guide plate. A bone grafting groove and a developing wire installation groove are provided in the thickness direction of the fusion device body, the developing wire installation groove is located on one side of the bone grafting groove, and a developing wire is provided in the developing wire installation groove. Anti-slip protrusions are provided on both end surfaces of the vertebral body in the thickness direction of the fusion device. The fixed guide plate is provided on one side of the fusion device body, extends along the thickness direction of the fusion device body, and forms a "T"-shaped structure with the fusion device, and a screw installation hole is provided on the fixed guide plate.

[0033] In this embodiment, the specific beneficial effects of the lumbar facet joint fusion device are mainly reflected in the following aspects:

[0034] 1. Structural design advantages

[0035] "T" shape structure design:

[0036] The "T"-shaped structure design between the fixed guide plate and the fusion device body is not only convenient for installation, but also has good structural stability after installation. This design ensures the stability and reliability of the fusion device and reduces the risk of displacement or loosening.

[0037] Anti-slip bumps:

[0038] Anti-skid protrusions are provided on both end surfaces of the fusion device in the thickness direction of the vertebral body. These protrusions enhance the friction with the bone surface, effectively preventing the movement of the fusion device after implantation, and further improving stability and safety.

[0039] 2. Functional characteristics and advantages

[0040] Bone grafting socket:

[0041] The bone grafting groove opened on the fusion device body provides convenience for bone grafting operation, helps to promote the bone fusion process and improve the fusion rate.

[0042] Development wire installation slot and development wire:

[0043] The imaging wire installation slot is located on one side of the bone graft slot and is equipped with a imaging wire. This design makes it easy to observe and locate the fusion device under X-ray, which helps to accurately determine the position and status of the fusion device, thereby ensuring accuracy and safety.

[0044] Improve the fusion rate:

[0045] The design of the fusion cage helps promote bone fusion and improve the fusion rate, thereby enhancing spinal stability and reducing postoperative pain and functional impairment.

[0046] Reduce surgical risks:

[0047] Due to its stable design and easy observation and positioning, the fusion cage can reduce risks during surgery and improve the success rate of surgery.

[0048] Adapt to the requirements of minimally invasive surgery:

[0049] The design of the fusion cage and related supporting tools meets the requirements of minimally invasive surgery, can reduce surgical trauma and promote postoperative recovery.

[0050] In the above technical solution, the fusion device for lumbar facet joint not only improves accuracy and safety, but also promotes the patient's postoperative recovery and the stability of the spine.

[0051] In a specific implementation scheme, the fixed guide plate includes a first fixed guide plate 2 and a second fixed guide plate 3, wherein:

[0052] The first fixing guide plate and the second fixing guide plate are arranged on both sides of the fusion device body in the thickness direction, and the first fixing guide plate and the second fixing guide plate are arranged alternately. The first fixing guide plate and the second fixing guide plate are provided with screw mounting holes 11. In order to ensure initial stability, the screw mounting holes are used for locking and fixing.

[0053] In this embodiment, in the lumbar facet joint fusion device, if the first fixing guide plate and the second fixing guide plate are arranged on both sides of the thickness direction of the fusion device body and are arranged alternately, the beneficial effects of such a design structure include:

[0054] 1. Enhanced structural stability

[0055] Staggered support:

[0056] The first fixed guide plate and the second fixed guide plate are staggered on both sides of the fusion device body to form a more stable support structure. After being implanted in the body, this structure can better resist forces from all directions and reduce the possibility of fusion device displacement, thereby ensuring the stability and safety of the operation.

[0057] Dissipate stress:

[0058] The staggered fixed guides help to disperse the stress on the fusion cage and avoid stress concentration that may cause the fusion cage to break or loosen. This helps to extend the life of the fusion cage and reduce the need for secondary surgery due to fusion cage failure.

[0059] 2. Improved convenience of surgical operation

[0060] Easy to locate and implant:

[0061] The staggered fixed guides make it easier to position and implant the fusion device during surgery. Doctors can more accurately determine the position and implantation direction of the fusion device by observing the position and angle of the fixed guides, thereby simplifying the surgical steps and shortening the operation time.

[0062] Easy to fix and adjust:

[0063] The staggered fixed guides also facilitate the fixation and adjustment of the fusion cage. The doctor can fine-tune the position and angle of the fusion cage by rotating or adjusting the position of the fixed guides to meet the needs of the operation. This design reduces the complexity and uncertainty during the operation.

[0064] 3. Promote bone fusion and recovery

[0065] Increase contact area:

[0066] The staggered fixed guides increase the contact area between the fusion cage and the bone, which helps promote the bone fusion process. More contact area means more osteoblasts can participate in the fusion process, thereby accelerating the fusion speed and improving the fusion quality.

[0067] Conducive to blood supply and nutrient delivery:

[0068] The staggered fixed guides also help improve the blood supply and nutrient delivery around the fusion cage. This design can increase the blood vessels and nerves around the bones, allowing more nutrients and growth factors to reach the fusion site, promoting bone regeneration and repair.

[0069] In summary, the design of staggered arrangement of the first fixed guide plate and the second fixed guide plate on both sides of the fusion device body not only enhances the structural stability of the fusion device and improves the convenience of surgical operation, but also helps to promote bone fusion and recovery.

[0070] In a specific implementation scheme, a bone grafting groove 4 and a developing wire installation groove 5 are provided in the thickness direction of the fusion device body, wherein:

[0071] The bone grafting groove and the developing wire installation groove are arranged side by side.

[0072] In a specific implementation manner, a developing wire is arranged in the developing wire installation groove.

[0073] In a specific embodiment, the fusion device body is provided with anti-slip protrusions 6 on both end surfaces in the thickness direction of the vertebral body.

[0074] In a specific implementation scheme, the anti-skid protrusion includes an anti-skid groove 7 and a clamp 8 arranged in the anti-skid groove, wherein:

[0075] An elastic body 9 is arranged between the clamping head and the anti-slip groove.

[0076] In a specific implementation manner, a titanium alloy spray layer 10 is provided on the anti-skid groove, and the titanium alloy spray layer is sealed and connected to the anti-skid groove.

[0077] In a specific embodiment, the elastomer is a bioelastomer.

[0078] In this embodiment, in the lumbar facet joint fusion device, the anti-slip protrusion is designed to include an anti-slip groove and a clamping head arranged in the anti-slip groove, and an elastic body is arranged between the clamping head and the anti-slip groove. The following are the specific beneficial effects of this design structure:

[0079] 1. Improved anti-slip performance

[0080] Increase friction:

[0081] The combined design of the anti-slip groove and the clip can significantly increase the friction between the fusion cage and the bone surface, preventing the fusion cage from moving or slipping after implantation. This is crucial to ensure the stability and safety of the operation.

[0082] Adapt to different bone surfaces:

[0083] The design of the anti-slip groove and the clip has certain flexibility and adaptability, and can be adjusted according to the shape and texture of different bone surfaces, thereby ensuring a close fit between the fusion device and the bone surface.

[0084] 2. Elastic support and cushioning

[0085] Elastomer function:

[0086] The elastic body (such as bioelastic body) arranged between the clamp head and the anti-skid groove can provide better elastic support and cushioning effect. During the operation, this elastic support can reduce the pressure of the fusion device on the bone surface and reduce the risk of the operation.

[0087] Protect bone surface:

[0088] The presence of the elastomer can also effectively protect the bone surface from damage caused by direct compression of the fusion device, helping to promote postoperative recovery and reduce complications.

[0089] 3. Sealing and biocompatibility

[0090] Titanium alloy spray coating seal:

[0091] Providing a titanium alloy spray coating on the anti-skid groove and sealing it with the anti-skid groove can further improve the sealing performance of the fusion device. This sealing design can prevent bacteria, viruses and other microorganisms from entering the fusion device, reducing the risk of infection.

[0092] Biocompatibility:

[0093] The use of bioelastomer as the elastomer material and titanium alloy spray coating as the sealing material can ensure that the fusion device has good biocompatibility. This means that the fusion device will not cause rejection or inflammatory response after implantation in the body, which helps to promote postoperative recovery and reduce complications.

[0094] 4. Convenience of surgical operation

[0095] Easy to install and adjust:

[0096] The design of the anti-slip protrusion makes the fusion device easier to install and adjust during surgery. The doctor can more accurately judge the position and angle of the fusion device by observing the position and state of the anti-slip protrusion, thereby simplifying the surgical steps and shortening the operation time.

[0097] Improve the success rate of surgery:

[0098] The anti-slip design also helps improve the success rate of surgery. Since the fusion device can maintain stability and position accuracy after implantation, doctors can perform the operation more accurately and reduce surgical risks and complications.

[0099] In summary, the anti-slip protrusion includes an anti-slip groove and a clamping head arranged in the anti-slip groove, and an elastic body is arranged between the clamping head and the anti-slip groove, which has important application value in lumbar facet joint fusion devices. This design not only improves the anti-slip performance, provides elastic support and buffering effects, enhances sealing and biocompatibility, but also improves the convenience of surgical operation.

[0100] In a specific implementation manner, the fusion device body and the fixed guide plate are integrally formed by 3D printing.

[0101] In a specific implementation manner, the fusion device body and the fixing guide plate are made of titanium alloy material.

[0102] Specifically, titanium and titanium alloys (Ti-6Al-4V) have good biocompatibility, mechanical properties, fatigue resistance and corrosion resistance, and are widely used in clinical practice as orthopedic implant materials. However, titanium alloy fusion devices have certain disadvantages: their elastic modulus is quite different from that of human bones, and titanium metal implants can produce a "stress shielding" effect on surrounding bone tissue, which may cause problems such as absorption of interface bone tissue and loosening of prosthesis. With the development of 3D printing technology, porous titanium alloy fusion devices have attracted widespread attention as an emerging development direction. Porous structure fusion devices have the following characteristics: good biocompatibility; suitable for cell adhesion, proliferation and differentiation, and conducive to cell ingrowth; reduced elastic modulus, effectively reducing or eliminating stress shielding. .

[0103] In the above technical solution, the fusion device body and the fixed guide plate are formed in one piece by 3D printing of titanium alloy material, which has the following specific beneficial effects:

[0104] 1. Beneficial effects of 3D printing integrated molding

[0105] Improved structural accuracy and stability:

[0106] 3D printing technology can achieve high-precision integrated molding, ensuring the structural accuracy and stability between the fusion device body and the fixed guide. This high-precision structure helps reduce errors and risks during surgery and improves the accuracy and safety of surgery.

[0107] Personalization:

[0108] 3D printing technology also supports personalized customization. It can print out a fusion device that conforms to the individual anatomical structure according to the patient's specific condition and surgical needs. This personalized fusion device can better adapt to the patient's bone morphology and improve the adaptability and effect of the surgery.

[0109] In this embodiment, the personalized customization includes: 1. The parameters of the fusion device body (length, thickness, width) conform to the personalized anatomical data. 2. The elastic modulus of the fusion device is personalized by adjusting the spatial configuration of 3D printing to provide appropriate strength. 3. The position of the locking screw hole of the fusion device is personalized to facilitate personalized implantation of the locking screw in the direction of the pedicle.

[0110] Shorten production cycle:

[0111] Compared with traditional manufacturing methods, 3D printing technology can significantly shorten the production cycle, which helps speed up the surgical preparation process and provide patients with more timely surgical treatment.

[0112] High material utilization rate:

[0113] 3D printing technology uses the principle of additive manufacturing to achieve efficient use of materials, which helps reduce material waste, lower production costs, and is also beneficial to the environment.

[0114] 2. Beneficial effects of titanium alloy materials

[0115] Good biocompatibility:

[0116] Titanium alloy materials have good biocompatibility and can exist stably in the body without causing rejection or inflammation. This helps reduce the occurrence of postoperative complications and promotes the patient's postoperative recovery.

[0117] Easy to process and shape:

[0118] Medical titanium alloy materials are easy to process and can meet the needs of different shapes and sizes. This helps doctors choose the appropriate fusion device model according to the patient's specific situation and improve the adaptability and effect of the operation.

[0119] In summary, the fusion device body and the fixed guide are made of titanium alloy material by 3D printing, which has the beneficial effects of improved structural accuracy and stability, personalized customization, shortened production cycle, high material utilization rate, good biocompatibility, lightness and durability, easy processing and molding, and cost-effectiveness. These effects help to improve the accuracy and safety of surgery, promote the postoperative recovery of patients, reduce medical expenses, and improve the overall quality and benefits of medical services.

[0120] Furthermore, the method for constructing the lumbar facet joint fusion device comprises the following steps:

[0121] Perform lumbar spine imaging scans on target patients, obtain scan data and store them as DICOM files; specifically include:

[0122] According to the DICOM file data, the lumbar spine three-dimensional model is reconstructed, and the model is designed using a bionic structure topology; specifically, it includes:

[0123] 1. Preparation

[0124] Make sure the patient has signed an informed consent form and understands the purpose, process and potential risks of the scan.

[0125] Instruct patients to remove all metal objects on their bodies, such as jewelry, belts, etc., to avoid metal artifacts affecting the scan results.

[0126] Instruct the patient to assume the appropriate position, such as prone or lateral position, depending on the requirements of the scan area, and ensure that the patient is comfortable and stable.

[0127] Select appropriate medical imaging equipment, such as CT (computed tomography) or MRI (magnetic resonance imaging) equipment, and determine scanning parameters based on clinical needs.

[0128] Make sure the equipment is in good working condition and check whether the detectors, coils and other components are intact.

[0129] Adjust equipment parameters such as tube voltage, tube current, slice thickness, etc. according to the patient's body shape and scanning area.

[0130] 2. Scanning Phase

[0131] position:

[0132] Use laser positioning lines or body surface markers to determine the scanning range and ensure that the scanning area covers the entire lumbar spine.

[0133] Adjust the patient's position as necessary to ensure that the scanning area is centered on the device.

[0134] Scan execution:

[0135] Start the scanning program and perform lumbar spine imaging scan according to the preset parameters.

[0136] During the scanning process, pay close attention to the patient's condition and the operation of the equipment to ensure the quality of the scan.

[0137] 3. Data processing and storage stage

[0138] Image reconstruction:

[0139] For CT scans, a reconstruction algorithm is used to convert the raw projection data into cross-sectional images.

[0140] For MRI scans, image data in the transverse, sagittal, and coronal planes are acquired directly.

[0141] Image post-processing:

[0142] Image processing software is used to perform post-processing operations such as image enhancement, filtering, and window width and window position adjustment to improve image quality and diagnostic accuracy.

[0143] Generate 3D reconstructed images, such as multi-planar reconstruction (MPR) and maximum intensity projection (MIP), as needed to assist doctors in diagnosis and treatment planning.

[0144] Data storage:

[0145] The processed image data is stored in DICOM format. DICOM is an international standard medical imaging file format that contains detailed information such as image data, patient information, and scanning parameters.

[0146] Ensure the security and reliability of storage devices to prevent data loss or damage.

[0147] The fusion device is designed according to the design model to determine the height, upper and lower contact surfaces, wall thickness, etc. of the fusion device, and finite element analysis is performed to finally design a customized lumbar facet joint fusion device; specifically including:

[0148] 1. Overview of the design process

[0149] Needs Analysis and Goal Setting:

[0150] Understand the target patient's lumbar spine anatomy, pathological changes, and surgical needs.

[0151] Set design goals for the fusion cage, such as providing stable support, promoting bone fusion, and reducing complications.

[0152] Design parameters determination:

[0153] According to the anatomical characteristics of the lumbar spine and surgical requirements, key parameters such as the height of the fusion device, the shape of the upper and lower contact surfaces, and the wall thickness are determined.

[0154] 3D Modeling and Finite Element Analysis:

[0155] Use 3D modeling software (such as SolidWorks, UG, etc.) to build a 3D model of the fusion device.

[0156] Import finite element analysis software (such as Abaqus, ANSYS, etc.) to perform stress analysis, displacement analysis, etc. to verify the rationality of design parameters.

[0157] Optimize design and iteration:

[0158] According to the results of finite element analysis, the design of the fusion device is optimized, such as adjusting the spatial configuration, height, wall thickness, contact surface shape, etc.

[0159] Repeat the steps of 3D modeling and finite element analysis until a satisfactory design result is obtained.

[0160] Customized design and manufacturing:

[0161] Based on the final design results and combined with the specific anatomical structure of the target patient, customized design and manufacturing are carried out.

[0162] 2. Determination of key parameters

[0163] Space configuration:

[0164] The spatial configuration design of the fusion cage is determined based on the stress characteristics and bone quality (bone density) of the target patient's lumbar facet joints to ensure that the elastic modulus of the fusion cage is best matched with the stress intensity of the facet joints of the target patient.

[0165] Highly determined:

[0166] The height of the fusion cage should be determined according to the gap height of the target patient's lumbar spine to ensure that the fusion cage can be stably supported between the upper and lower vertebrae.

[0167] The height selection should take into account both stability and flexibility, avoiding stress concentration caused by being too high or insufficient support caused by being too low.

[0168] Upper and lower contact surface shapes:

[0169] The shape of the upper and lower contact surfaces should match the shape of the lumbar endplate to improve the stability of the fusion cage and promote bone fusion.

[0170] Shapes such as wedge and arc can be selected to adapt to the physiological curvature and pathological changes of different lumbar vertebrae.

[0171] The contact surface can be designed with a toothed structure to enhance the meshing force and initial stability between the fusion cage and the vertebral body.

[0172] Wall thickness selection:

[0173] The wall thickness should be determined according to the material, size and use environment of the fusion device to ensure that the fusion device has sufficient mechanical strength and durability.

[0174] Thicker wall thickness can provide better support and stability, but it also increases the weight of the fusion cage and the difficulty of implantation.

[0175] The selection of wall thickness should take into account both mechanical properties and surgical convenience.

[0176] 3. Finite Element Analysis

[0177] Create a finite element model:

[0178] Import the three-dimensional model of the fusion device into the finite element analysis software for meshing and material property assignment.

[0179] Set boundary conditions and loads to simulate the stress conditions of the lumbar spine.

[0180] Stress Analysis:

[0181] Analyze the stress distribution of the fusion device under load to ensure that the stress concentration area does not exceed the allowable stress of the material.

[0182] Evaluate the overall mechanical properties and stability of the fusion cage.

[0183] Displacement analysis:

[0184] Analyze the displacement of the fusion device under stress and ensure that the displacement is within an acceptable range.

[0185] To evaluate the supporting effect of the fusion cage on the lumbar intervertebral space.

[0186] Optimization suggestions:

[0187] Based on the finite element analysis results, optimization suggestions are put forward, such as adjusting the height, wall thickness, contact surface shape, etc.

[0188] Repeat the finite element analysis steps to verify the optimized design effect.

[0189] 4. Customized design and manufacturing

[0190] Considering the patient’s anatomy:

[0191] The anatomical structure information of the lumbar spine is extracted based on the lumbar spine CT or MRI scan data of the target patient.

[0192] Using 3D modeling software, the fusion device is customized according to the patient's anatomical structure information.

[0193] Transmitting the modeling data of the designed customized lumbar facet joint fusion device to the 3D printer, and running the 3D printer for printing;

[0194] The printed lumbar facet joint fusion device is disassembled and the support is removed to complete the production of the fusion device.

[0195] In this embodiment, through 3D printing technology, rapid and accurate manufacturing of lumbar facet joint fusion devices can be achieved, thereby improving production efficiency; the lumbar facet joint fusion device of the present application adopts a customized design, and can be customized according to the specific conditions of the patient, thereby improving the treatment effect; developing marks are provided inside the fusion device, which is convenient for observation and positioning under X-rays, thereby improving the accuracy and safety of the operation; the "T"-shaped structure design formed by the fusion device body and the fixed guide plate is conducive to convenient installation, and the structural stability after installation is good, and the anti-slip protrusion setting can effectively prevent movement.

[0196] Those skilled in the art will appreciate that the present application may be implemented as a system, method or computer program product.

[0197] Therefore, the present disclosure may be specifically implemented in the following forms, namely: it may be completely hardware, it may be completely software (including firmware, resident software, microcode, etc.), or it may be a combination of hardware and software, generally referred to herein as a "circuit", "module" or "system". In addition, in some embodiments, the present application may also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable medium may contain computer-readable program code.

[0198] Any combination of one or more computer-readable media can be used. Computer-readable media can be computer-readable signal media or computer-readable storage media. Computer-readable storage media can be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this document, computer-readable storage media can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0199] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art can change, modify, replace and modify the above embodiments within the scope of the present application. On this basis, a variety of replacements and improvements can be made to the present application, all of which fall within the scope of protection of the present application.

Claims

1. A fusion device for lumbar facet joints, characterized in that: include: Fusion device body and fixed guide plate, wherein: The fusion device body and the fixing guide plate are integrally formed.

2. The fusion device for lumbar facet joint according to claim 1, characterized in that: The fixed guide plate includes a first fixed guide plate and a second fixed guide plate, wherein: The first fixed guide plate and the second fixed guide plate are arranged on both sides of the fusion device body in the thickness direction, and the first fixed guide plate and the second fixed guide plate are arranged alternately.

3. The fusion device for lumbar facet joint according to claim 2, characterized in that: The fusion device body is provided with a bone grafting groove and a developing wire installation groove in the thickness direction, wherein: The bone grafting groove and the developing wire installation groove are arranged side by side.

4. The fusion device for lumbar facet joint according to claim 3, characterized in that: A developing wire is arranged in the developing wire installation groove.

5. The fusion device for lumbar facet joint according to claim 4, characterized in that: The two end surfaces of the fusion device body in the thickness direction of the vertebral body are both provided with anti-slip protrusions.

6. The fusion device for lumbar facet joint according to claim 5, characterized in that: The anti-skid protrusion includes an anti-skid groove and a clamping head arranged in the anti-skid groove, wherein: An elastic body is arranged between the clamping head and the anti-slip groove.

7. The fusion device for lumbar facet joint according to claim 6, characterized in that: A titanium alloy spray layer is arranged on the anti-skid groove, and the titanium alloy spray layer is sealed and connected to the anti-skid groove.

8. The fusion device for lumbar facet joint according to claim 7, characterized in that: The elastomer is a biological elastomer.

9. The fusion device for lumbar facet joint according to claim 8, characterized in that: The fusion device body and the fixing guide plate are integrally formed by 3D printing.

10. The fusion device for lumbar facet joint according to claim 9, characterized in that: The fusion device body and the fixing guide plate are made of medical titanium alloy material.

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