An intraosseous total ankle prosthesis system

Abstract

The application provides an intraosseous total ankle joint prosthesis system, belonging to the technical field of ankle joint prosthesis. The system comprises a tibia component, a diaphysis support component for enhancing intramedullary stability, the diaphysis support component being arranged on the top of the tibia component, a polyethylene liner and a clamping assembly, the polyethylene liner being fixedly connected with the tibia component through the clamping assembly, a chamfered cutting talus, the chamfered cutting talus being rotatably connected to the bottom of the polyethylene liner, a first fixing assembly and a second fixing assembly for improving the stability of the ankle joint prosthesis, the first fixing assembly comprising an inlet opening, a first flow channel, a filler flow channel and a second flow channel which are circularly arranged at equal intervals in the tibia component. The lightweight prosthesis design of the application reduces the burden of patients when walking and standing after operation, reduces the pain caused by excessive weight bearing, and reduces the prosthesis wear, which not only helps the patients to actively carry out rehabilitation training, speeds up the rehabilitation process, and reduces the probability of secondary surgery.

Description

Technical Field

[0001] The present invention relates to the technical field of ankle joint prostheses, and more particularly to an intraosseous total ankle joint prosthesis system. Background Art

[0002] As an important weight-bearing and movement hub of the human body, the ankle joint plays an indispensable role in daily activities such as walking, running, and jumping. However, the ankle joint is extremely vulnerable to a variety of factors, resulting in impaired function. Trauma, such as fractures caused by falls from heights and traffic accidents, joint erosion caused by rheumatoid arthritis, and articular cartilage degeneration caused by osteoarthritis, can all seriously affect the patient's normal life and mobility. When conservative treatments, such as medication and physical therapy, are unable to effectively relieve symptoms, total ankle replacement becomes an important medical means to improve the patient's quality of life.

[0003] Currently, the entire prosthesis system is fixed using a combination of screws and bone cement. However, the existing prosthesis design makes it difficult to ensure adequate and even distribution of the bone cement between the prosthesis and the bone. This not only reduces the strength of the fixation between the prosthesis and the bone, making it prone to loosening and displacement during long-term use, leading to surgical failure, but also affects the fusion of bone tissue and the prosthesis, prolonging the patient's recovery period.

[0004] At the same time, in order to ensure that the existing ankle prosthesis system has good strength and support, the mass of the entire prosthesis is relatively large. The heavy prosthesis not only increases the burden on the patient's lower limbs, brings additional pressure to the patient's walking and standing after surgery, aggravates joint pain, but also limits the patient's range of motion and flexibility, affecting the patient's enthusiasm for rehabilitation. In addition, the large weight causes the prosthesis to wear more severely when it is subjected to exercise stress, shortens the service life of the prosthesis, and may require a secondary replacement surgery, which brings a double burden to the patient both physically and financially. Therefore, there is an urgent need for an intraosseous total ankle prosthesis system to solve the above problems. Summary of the Invention

[0005] In view of the technical problems of uneven bone cement filling and heavy prosthesis mass existing in the prior art, the present invention aims to provide an intraosseous total ankle prosthesis system.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] An endosseous total ankle prosthesis system, comprising:

[0008] a tibial component; a stem support component for enhancing intramedullary stability, the stem support component being disposed on top of the tibial component;

[0009] A polyethylene liner and a snap-fit ​​assembly, wherein the polyethylene liner is fixedly connected to the tibial assembly via the snap-fit ​​assembly;

[0010] Drain hole; a sealing component for ensuring that the drainage hole is not filled with bone cement;

[0011] a chamfered talus, the chamfered talus being rotatably connected to the bottom of the polyethylene liner;

[0012] A first fixing component and a second fixing component are used to improve the stability of an ankle joint prosthesis. The first fixing component includes a feed port, a first flow channel, a filling flow channel, and a second flow channel that are equidistantly arranged in a circular shape inside the tibial component. The feed port, the first flow channel, the filling flow channel, and the second flow channel are all interconnected. The cross-section of the feed port is trumpet-shaped. The inner diameters of the first flow channel, the filling flow channel, and the second flow channel are all smaller than the inner diameter of the feed port. The cross-section of the filling flow channel is spiral-shaped. The inner diameter of the second flow channel gradually decreases in the direction approaching the backbone support component.

[0013] Optionally, the tibial component includes a tibial tray, one side of which is arranged on a mating plate, and an outer wall of one side of the mating plate is provided with through holes that are equidistantly distributed and convenient for tibial nails to pass through, and the first fixing assembly and the second fixing assembly are both arranged inside the tibial tray.

[0014] Optionally, the backbone support assembly includes a hollow support member, which is honeycomb-shaped, and circular plates are fixedly connected to the upper and lower ends of the hollow support member. A second screw is fixedly connected to the circular plate located at the top of the hollow support member, and a first screw is fixedly connected to the circular plate located at the bottom of the hollow support member. A threaded groove is provided on the top of the tibial tray, and the backbone support assembly is fixed to the top outer wall of the tibial tray through a threaded connection between the first screw and the threaded groove. Three threaded sleeves are fixedly connected to the circular plates located at the bottom of the hollow support member, and the threaded sleeves are threadedly connected to the second screw.

[0015] Optionally, a docking joint is fixedly connected to another circular plate located on the top of the hollow support member, and the docking joint is bullet-shaped. The docking joint is provided with three groups of first circular grooves from top to bottom, and the inner diameters of the three groups of first circular grooves gradually increase from top to bottom. The circumferential outer wall of the docking joint is provided with oblique grooves distributed in a circular shape at equal distances, and the oblique grooves are connected to the first circular grooves.

[0016] Optionally, the snap-on assembly includes a locking plate fixedly connected to the top outer wall of the polyethylene pad, a protrusion is fixedly connected to the top outer wall of the locking plate, an embedded groove is provided on the top of the locking plate, a locking groove is provided on the bottom outer wall of the tibial tray, the locking groove cooperates with the locking plate, a snap-on slot is provided on one side of the locking groove, the snap-on slot cooperates with the protrusion, a snap-on block is fixedly connected to the inner wall of one side of the locking groove, and the snap-on block cooperates with the embedded groove.

[0017] Optionally, the drainage holes are distributed in an equidistant fan-shaped manner on one side of the tibial tray, the inner diameter of the drainage holes gradually increases in a direction away from the second fixing component, and the drainage holes are obliquely opened inside the tibial tray.

[0018] Optionally, the second fixing assembly includes a second annular groove provided on the top outer wall of the tibial tray, and the inner walls on both sides of the second annular groove are fixedly connected with partitions distributed in an arc shape at equal distances, and the partitions on the inner walls on both sides of the second annular groove are staggered.

[0019] Optionally, the sealing assembly includes a slide groove provided on the inner circumferential wall of the second annular groove, the slide groove is connected to the drainage hole, and a slide plate is slidably connected inside the slide groove for ensuring the sealing of the drainage hole.

[0020] Optionally, a groove is provided on the bottom inner wall of the second annular groove, a ring plate is slidably connected to the inside of the groove, a bent column is fixedly connected to the top outer wall of the ring plate, and the end of the bent column away from the ring plate is fixedly connected to the slide.

[0021] Optionally, a spring is fixedly connected to the bottom inner wall of the groove, and the top end of the spring is fixedly connected to the bottom outer wall of the ring plate.

[0022] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0023] In the above scheme, through the setting of the backbone support component, during the support and fixation process of the backbone support component, the hollow support member structure in the shape of a hollow honeycomb tube can make the entire backbone support component lightweight while maintaining high-strength support force, thereby reducing the weight of the tibial end prosthesis. This not only reduces the burden on the patient's lower limbs and improves the convenience of postoperative activities, but also reduces the fatigue wear of the prosthesis caused by long-term weight bearing. At the same time, the regular hexagonal honeycomb unit can evenly disperse external forces, so that the support part is not easy to deform when it is under greater pressure, ensuring the stability of the prosthesis during long-term use, and effectively resisting various stresses generated by walking, exercise, etc., and the hollow honeycomb tubular structure provides a large surface area and space. During the operation, bone cement can be fully filled into the gaps in the honeycomb tube to form a mechanical lock. This tight combination method enhances the fixation strength between the prosthesis and bone tissue, further improves the stability of the prosthesis, and reduces the risk of loosening.

[0024] Since the flow channel in the entire first fixation component adopts a variable diameter design, the diameter of the feed port (i.e. the part close to the tibial surface) is larger than the diameter of other flow channels, which facilitates the rapid growth of bone tissue. At the same time, the diameter of the second flow channel gradually decreases, which can effectively ensure the structural strength of the entire channel. The filler flow channel located between the first flow channel and the second flow channel is spiral, thereby extending the filling path of the bone cement inside the tibial tray, making the cured bond between the bone cement and the tibial tray tighter.

[0025] Through the coordinated work of the sealing component and the drainage hole, the problem of bone cement clogging the drainage hole is effectively avoided. During the bone cement injection process, the bone cement in the second annular groove exerts pressure on the annular plate, and the annular plate drives the curved column and the slide plate to descend. When the bone cement is filled to a certain amount, the downward pressure generated by its gravity offsets the spring force, and the slide plate slides to the bottom of the drainage hole, preventing bone cement from entering the drainage hole during the filling process, so that the patient can smoothly discharge the accumulated fluid in the joint through the drainage hole after surgery, reducing the risk of infection. In addition, the lightweight prosthesis design reduces the burden on patients when walking and standing after surgery, reduces pain caused by excessive weight, and reduces prosthesis wear. This not only helps patients actively carry out rehabilitation training and speed up the recovery process, but also reduces the chance of secondary surgery. 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 one skilled in the art to make and use the invention.

[0027] Figure 1 This is a schematic diagram of the overall front structure of the present invention;

[0028] Figure 2 For the present inventionFigure 1 Schematic diagram of the enlarged structure at A in the middle;

[0029] Figure 3 This is a schematic diagram of the split structure of the backbone support assembly of the present invention;

[0030] Figure 4 It is a schematic diagram of the overall top view of the structure of the present invention;

[0031] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0032] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure at B in the middle;

[0033] Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0034] Figure 8 This is a schematic diagram of the disassembled structure of the tibial component and the polyethylene liner in the present invention;

[0035] Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at D in the middle;

[0036] Figure 10 It is a schematic diagram of the bottom structure of the tibial tray of the present invention.

[0037] [Reference Signs]

[0038] 1. Tibial component; 101. Tibial tray; 102. Matching plate; 103. Through hole;

[0039] 2. Backbone support assembly; 201. Hollow support member; 202. Circular plate; 203. First screw; 204. Second screw; 205. Threaded sleeve; 206. Butt joint; 207. Bevel groove; 208. First annular groove; 209. Threaded groove;

[0040] 3. Polyethylene liner; 4. Chamfer cutting of talus;

[0041] 5. First fixed component; 501. Feed port; 502. First flow channel; 503. Filling flow channel; 504. Second flow channel;

[0042] 6. Second fixing assembly; 601. Second annular groove; 602. Partition plate;

[0043] 7. Snap-fit ​​assembly; 701. Locking plate; 702. Locking groove; 703. Protrusion; 704. Embedded groove; 705. Card slot; 706. Card block;

[0044] 8. Drainage hole;

[0045] 9. Sealing assembly; 901. Ring plate; 902. Slide groove; 903. Slide plate; 904. Bending column; 905. Groove; 906. Spring.

[0046] 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

[0047] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative methods for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0048] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0049] In general, terms can be understood, at least in part, from their 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.

[0050] 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” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0051] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated 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 should be similarly interpreted accordingly.

[0052] like Figures 1 to 10 As shown, an embodiment of the present invention provides an intraosseous total ankle prosthesis system, including: a tibial component 1; a backbone support component 2 for enhancing intramedullary stability, the backbone support component 2 is arranged on the top of the tibial component 1; a polyethylene liner 3 and a snap-on component 7, the polyethylene liner 3 is fixedly connected to the tibial component 1 via the snap-on component 7.

[0053] Drain hole 8; a sealing component 9 for ensuring that the drainage hole 8 is not filled with bone cement.

[0054] The chamfered talus 4 is rotatably connected to the bottom of the polyethylene liner 3 .

[0055] The first fixing component 5 and the second fixing component 6 for improving the stability of the ankle joint prosthesis, the first fixing component 5 includes a feed port 501, a first flow channel 502, a filling flow channel 503, and a second flow channel 504 which are equidistantly arranged in a circular shape inside the tibial component 1. The feed port 501, the first flow channel 502, the filling flow channel 503, and the second flow channel 504 are all interconnected. The cross section of the feed port 501 is trumpet-shaped. The inner diameters of the first flow channel 502, the filling flow channel 503, and the second flow channel 504 are all smaller than the inner diameter of the feed port 501. The cross section of the filling flow channel 503 is spiral-shaped. The inner diameter of the second flow channel 504 gradually decreases in the direction close to the backbone support component 2. When filling with bone cement for fixation, the bone cement will flow from The feed port 501 leaks downward, and as the bone cement is continuously injected, it can effectively fill the first flow channel 502, the filling flow channel 503 and the second flow channel 504. During this process, since the flow channels in the entire first fixing component 5 adopt a variable diameter design, the diameter of the feed port 501 (i.e., the part close to the tibial surface) is larger than the diameters of other flow channels, thereby facilitating rapid growth of bone tissue. At the same time, the diameter of the second flow channel 504 gradually decreases, which can effectively ensure the structural strength of the entire channel. The filling flow channel 503 located between the first flow channel 502 and the second flow channel 504 is spiral, thereby extending the filling path of the bone cement inside the tibial component 1, making the cured bond between the bone cement and the tibial component 1 tighter.

[0056] The tibial component 1 includes a tibial tray 101, one side of the tibial tray 101 is arranged on a matching plate 102, and the outer wall of one side of the matching plate 102 is provided with through holes 103 that are evenly distributed and convenient for tibial nails to pass through. The first fixing component 5 and the second fixing component 6 are both arranged inside the tibial tray 101. The tibial tray 101 serves as the main body of the tibial component 1, carrying and connecting other key components. At the same time, the matching plate 102 and the through holes 103 thereon facilitate the passage of the tibial nails, further fixing the tibial component 1 to the tibia and enhancing the stability of the system.

[0057] The backbone support assembly 2 includes a hollow support member 201, which is honeycomb-shaped. The upper and lower ends of the hollow support member 201 are fixedly connected with circular plates 202. A second screw 204 is fixedly connected to the circular plate 202 at the top of the hollow support member 201, and a first screw 203 is fixedly connected to the circular plate 202 at the bottom of the hollow support member 201. A threaded groove 209 is provided on the top of the tibial tray 101. The backbone support assembly 2 is fixed to the top outer wall of the tibial tray 101 through the threaded connection between the first screw 203 and the threaded groove 209. The three screws 203 and the threaded groove 209 are fixed to the top outer wall of the tibial tray 101. A threaded sleeve 205 is fixedly connected to the circular plate 202 at the bottom of the support member 201, and the threaded sleeve 205 is threadedly connected to the second screw rod 204. The hollow support member 201 is honeycomb-shaped, which reduces the weight of the backbone support component 2 while ensuring high-strength support force, reduces the burden on the patient's lower limbs, and reduces fatigue and wear of the prosthesis. At the same time, the circular plate 202 connects the hollow support member 201 with the first screw rod 203 and the second screw rod 204 to achieve a stable connection between the backbone support component 2 and the tibial tray 101, and the threaded connection between the threaded sleeve 205 and the second screw rod 204 facilitates the assembly and adjustment of the backbone support component 2.

[0058] Preferably, another circular plate 202 located at the top of the hollow support member 201 is fixedly connected with a docking joint 206, which is bullet-shaped and has three groups of first annular grooves 208 from top to bottom. The inner diameters of the three groups of first annular grooves 208 gradually increase from top to bottom, and the circumferential outer wall of the docking joint 206 is provided with equidistant circularly distributed oblique grooves 207, which are connected to the first annular grooves 208. The bullet-shaped docking joint 206 is easy to insert into the tibia, and the oblique grooves 207 on its surface and the first annular grooves 208 with different inner diameters increase the contact area with the bone cement, so that the bone cement forms a more stable mechanical lock during the filling process, further improving the fixation strength of the backbone support component 2 and the tibia.

[0059] The clamping assembly 7 comprises a locking plate 701 fixedly connected to the outer wall at the top of the polyethylene liner 3, the top outer wall of the locking plate 701 is fixedly connected with a protrusion 703, the top of the locking plate 701 is provided with an embedded groove 704, the bottom outer wall of the tibial tray 101 is provided with a locking groove 702, the locking groove 702 is matched with the locking plate 701, one side of the locking groove 702 is provided with a clamping groove 705 matched with the protrusion 703, the inner wall of one side of the locking groove 702 is fixedly connected with a clamping block 706 matched with the embedded groove 704, the locking plate 701 at the top of the polyethylene liner 3 is matched with the locking groove 702 at the bottom of the tibial tray 101, the protrusion 703 is clamped with the clamping groove 705 and the clamping block 706 is clamped with the embedded groove 704, so that the polyethylene liner 3 and the tibial component 1 are quickly and stably connected, and the installation and replacement are facilitated.

[0060] The drainage holes 8 are equidistantly distributed in a fan shape on one side of the tibial tray 101, the inner diameter of the drainage holes 8 gradually increases away from the second fixing assembly 6, the drainage holes 8 are obliquely arranged in the interior of the tibial tray 101, and the drainage holes 8 are equidistantly distributed in a fan shape on one side of the tibial tray 101 and are obliquely arranged with a gradually changing inner diameter, which is beneficial to the drainage of postoperative joint effusion and avoids infection caused by effusion accumulation, and the oblique design prevents bone cement from directly flowing into the drainage holes 8 during the filling process to some extent.

[0061] The second fixing assembly 6 comprises a second circular groove 601 arranged on the top outer wall of the tibial tray 101, the inner walls on both sides of the second circular groove 601 are fixedly connected with equidistantly arranged arc-shaped partitions 602, the partitions 602 on the inner walls on both sides of the second circular groove 601 are arranged in a staggered manner, and the second circular groove 601 and the staggered partitions 602 arranged in the interior thereof increase the contact area with the bone cement, so that the stability and strength of the entire prosthesis system are further improved after the bone cement is filled therein and solidified.

[0062] The sealing assembly 9 comprises a sliding groove 902 arranged on the circumferential inner wall of the second circular groove 601, the sliding groove 902 is communicated with the drainage holes 8, a sliding plate 903 for ensuring the sealing of the drainage holes 8 is slidingly connected to the interior of the sliding groove 902, the sliding groove 902 connects the second circular groove 601 and the drainage holes 8, and the sliding plate 903 slides in the sliding groove 902, so that the bone cement is effectively prevented from entering the drainage holes 8 during the filling process of the bone cement, and the drainage function of the drainage holes 8 can be normally played after the operation.

[0063] The bottom inner wall of the second circular groove 601 is provided with a groove 905, the inner part of the groove 905 is slidably connected with a ring plate 901, the top outer wall of the ring plate 901 is fixedly connected with a bent column 904, one end of the bent column 904 away from the ring plate 901 is fixedly connected with the sliding plate 903, when the whole prosthesis system is installed, the medical staff first installs the bone cement injector on the bone cement gun, then inserts the gun head into the part to be filled in the tibia, slowly injects the bone cement to the top surface of the tibial tray 101, because the second circular groove 601 is arranged on the surface of the tibial tray 101, as the bone cement on the surface of the tibial tray 101 continuously increases, the bone cement will flow from the surface of the tibial tray 101 into the second circular groove 601, when the second circular groove 601 is filled with bone cement, as the bone cement in the second circular groove 601 continuously injects, the bone cement will exert downward pressure on the ring plate 901, when the ring plate 901 is subjected to pressure, the bent column 904 and the sliding plate 903 will be lowered together, when the bone cement is filled to a certain amount, at this time, the downward pressure generated by the gravity of the bone cement and the elastic force of the spring 906 are offset, so that the ring plate 901 stops descending, and at this time, the sliding plate 903 sliding to the lower side of the drainage hole 8 cannot realize sealing, so that the accumulated fluid in the joint after the operation can be easily discharged through the drainage hole 8, the risk of infection is reduced, and in the process of filling the bone cement, the sliding plate 903 is located on one side of the drainage hole 8, which can effectively avoid the situation that the bone cement is accidentally injected into the drainage hole 8 and causes blockage.

[0064] The bottom inner wall of the groove 905 is fixedly connected with a spring 906, the top end of the spring 906 is fixedly connected on the bottom outer wall of the ring plate 901, the spring 906 provides upward elastic force for the ring plate 901, interacts with the downward pressure of the bone cement, accurately controls the position of the sliding plate 903, and ensures that the drainage hole 8 will not be blocked when the bone cement is filled, and can normally drain after the operation.

[0065] The working process of the technical scheme provided by the application is as follows:

[0066] In use, through the threaded connection between the second screw 204 and the threaded sleeve 205, multiple sets of hollow components can be effectively assembled, and after assembly, the entire backbone support assembly 2 can be inserted into the tibia of the patient to realize the installation and fixation of the whole ankle joint prosthesis system. During the support and fixation of the backbone support assembly 2, through the structure of the hollow support 201 in the form of a hollow honeycomb tube, the entire backbone support assembly 2 can realize lightweight while maintaining high strength support force, reducing the weight of the tibial end prosthesis. This not only reduces the burden on the lower limbs of the patient and improves the convenience of postoperative activity, but also reduces the fatigue and wear of the prosthesis caused by long-term weight-bearing. At the same time, the hexagonal honeycomb cells can uniformly disperse external forces, so that the support part is not easy to deform when bearing large pressure, ensuring the stability of the prosthesis during long-term use, effectively resisting various stresses generated during walking, exercise, etc. Moreover, the hollow honeycomb tubular structure provides a large surface area and space, which allows bone cement to fully fill the gaps in the honeycomb tube during surgery, forming a mechanical lock. This close combination enhances the fixation strength between the prosthesis and the bone tissue, further improving the stability of the prosthesis and reducing the risk of loosening.

[0067] When the entire prosthesis is installed and filled with bone cement for fixation, the bone cement will seep down from the inlet 501 at the top of the tibial tray 101. As the bone cement is continuously injected, it can effectively fill the first flow channel 502, the filler flow channel 503, and the second flow channel 504. During this process, due to the variable diameter design of the flow channels in the entire first fixation assembly 5, the diameter of the inlet 501 (i.e. the part close to the surface of the tibia) is larger than that of the other flow channels, thereby facilitating rapid ingrowth of bone tissue. At the same time, the diameter of the second flow channel 504 gradually decreases, effectively ensuring the structural strength of the entire channel. The filler flow channel 503 located between the first flow channel 502 and the second flow channel 504 is in the form of a spiral, thereby extending the filling path of the bone cement inside the tibial tray 101, making the solidification and combination between the bone cement and the tibial tray 101 more compact.

[0068] At the same time, during the process of injecting bone cement into the first fixing component 5, some bone cement will flow into the second annular groove 601. The bone cement flowing into the second annular groove 601 will combine with the partitions 602 on the inner walls on both sides thereof and solidify, thereby further improving the strength of the entire prosthesis system. The partitions 602 on the inner walls on both sides of the second annular groove 601 are staggered, ensuring that the bone cement and the partitions 602 can be fully combined. As the bone cement in the second annular groove 601 is continuously injected, the bone cement will exert downward pressure on the annular plate 901. When the annular plate 901 is under pressure, it will drive the bent column 904 and the slide plate 9 03 descends together. When the bone cement is filled to a certain amount, the downward pressure of the bone cement generated by gravity is offset by the elastic force of the spring 906, so that the ring plate 901 stops descending. At this time, the slide plate 903 that slides to the bottom of the drainage hole 8 cannot achieve sealing (it should be noted that the specifications of the slide plate 903 are compatible with the specifications of the drainage hole 8). Therefore, the drainage hole 8 can facilitate the discharge of fluid accumulated in the joint after surgery, reducing the risk of infection. In the process of filling bone cement, the slide plate 903 is located on one side of the drainage hole 8, which can effectively prevent the bone cement from being accidentally injected into the drainage hole 8 and causing it to be blocked.

[0069] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0070] 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 principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An intraosseous total ankle prosthesis system, characterized in that: include: tibial component; a diaphyseal support component for enhancing intramedullary stability, the diaphyseal support component being disposed on top of the tibial component; A polyethylene liner and a snap-fit ​​assembly, wherein the polyethylene liner is fixedly connected to the tibial assembly via the snap-fit ​​assembly; drain hole; A sealing component for ensuring that the drainage hole is not filled with bone cement; a chamfered talus, the chamfered talus being rotatably connected to the bottom of the polyethylene liner; A first fixing assembly and a second fixing assembly for improving the stability of an ankle joint prosthesis, wherein the first fixing assembly comprises a feed port, a first flow channel, a filler flow channel, and a second flow channel, which are equidistantly and circularly arranged inside the tibial component; the feed port, the first flow channel, the filler flow channel, and the second flow channel are all interconnected; the cross section of the feed port is trumpet-shaped; the inner diameters of the first flow channel, the filler flow channel, and the second flow channel are all smaller than the inner diameter of the feed port; the cross section of the filler flow channel is spiral-shaped; and the inner diameter of the second flow channel gradually decreases in a direction approaching the backbone support assembly; The tibial component includes a tibial tray, the first fixing component and the second fixing component are both arranged inside the tibial tray, and the second fixing component includes a second annular groove opened on the top outer wall of the tibial tray; The sealing assembly includes a slide groove formed on the inner wall of the second annular groove, the slide groove being connected to the drainage hole, and a slide plate slidably connected to the interior of the slide groove for ensuring the sealing of the drainage hole; A groove is formed on the bottom inner wall of the second annular groove, a ring plate is slidably connected to the inside of the groove, a bent column is fixedly connected to the top outer wall of the ring plate, and one end of the bent column away from the ring plate is fixedly connected to the slide plate; The bottom inner wall of the groove is fixedly connected with a spring, and the top end of the spring is fixedly connected to the bottom outer wall of the ring plate.

2. The intraosseous total ankle prosthesis system according to claim 1, characterized in that: One side of the tibial tray is arranged on the matching plate, and one side outer wall of the matching plate is provided with through holes which are distributed at equal distances and are convenient for the tibial nails to pass through.

3. The intraosseous total ankle prosthesis system according to claim 2, characterized in that: The backbone support assembly includes a hollow support member, which is honeycomb-shaped. The upper and lower ends of the hollow support member are fixedly connected to circular plates. A second screw is fixedly connected to a circular plate located at the top of the hollow support member, and a first screw is fixedly connected to a circular plate located at the bottom of the hollow support member. A threaded groove is provided on the top of the tibial tray. The backbone support assembly is fixed to the top outer wall of the tibial tray through a threaded connection between the first screw and the threaded groove. Three threaded sleeves are fixedly connected to the circular plates at the bottom of the hollow support member, and the threaded sleeves are threadedly connected to the second screw.

4. The intraosseous total ankle prosthesis system according to claim 3, characterized in that: Another circular plate located on the top of the hollow support member is fixedly connected to a docking joint, which is bullet-shaped. The docking joint is provided with three groups of first circular grooves from top to bottom. The inner diameters of the three groups of first circular grooves gradually increase from top to bottom. The circumferential outer wall of the docking joint is provided with oblique grooves distributed in a circular shape at equal distances, and the oblique grooves are connected to the first circular grooves.

5. The intraosseous total ankle prosthesis system according to claim 2, characterized in that: The snap-on assembly includes a locking plate fixedly connected to the top outer wall of the polyethylene liner, a protrusion fixedly connected to the top outer wall of the locking plate, an embedded groove is provided on the top of the locking plate, a locking groove is provided on the bottom outer wall of the tibial tray, the locking groove cooperates with the locking plate, a card slot is provided on one side of the locking groove, the card slot cooperates with the protrusion, a card block is fixedly connected to the inner wall of one side of the locking groove, and the card block cooperates with the embedded groove.

6. The intraosseous total ankle prosthesis system according to claim 2, characterized in that: The drainage holes are distributed in a fan-shaped manner with equal distances on one side of the tibial tray. The inner diameter of the drainage holes gradually increases in a direction away from the second fixing component. The drainage holes are obliquely opened inside the tibial tray.

7. The intraosseous total ankle prosthesis system according to claim 2, characterized in that: The inner walls on both sides of the second annular groove are fixedly connected with partitions distributed in an arc shape at equal distances, and the partitions on the inner walls on both sides of the second annular groove are distributed in a staggered manner.

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