Tibial tray prosthesis

Abstract

The application discloses a tibial tray prosthesis, which comprises a tray body and a connecting piece, the tray body has a proximal bone side of a connected end face facing a tibia and a distal bone side of a connected end face facing away from the tibia, the connecting piece is arranged in the tray body along the direction from the distal bone side to the proximal bone side, the connecting piece has an arc-shaped part, the center line of the longitudinal section of the arc-shaped part is arc-shaped, and the arc-shaped part is used for moving from the distal bone side to the proximal bone side of the tray body so that the arc-shaped part is inserted into the tibia. By adopting the scheme, tibial cortical damage caused by slotting on the front side of the tibia can be avoided, and the operation is simplified. The arc-shaped part can move along the arc-shaped center line, which is beneficial to the insertion process of the arc-shaped part. The arc-shaped part can improve the stability of the prosthesis in the vertical direction and the front-back direction.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a tibial support prosthesis. Background Technology

[0002] With the popularization of robotics and 3D printing technologies, the use of bio-based knee prostheses is becoming increasingly widespread. However, current mainstream bio-based knee prostheses still adopt the design concept of traditional cemented knee prostheses. While traditional cemented prostheses can achieve stable initial fixation through the cement, for bio-based prostheses, insufficient initial fixation stability leading to early loosening is one of the main causes of early failure.

[0003] Existing knee implants require insertion after slotting the anterior tibia, which can lead to damage to the tibial cortex and increase the risk of tibial plateau fractures. Furthermore, this horizontally inserted anchoring structure lacks stability during anteroposterior movement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the existing tibial support prosthesis, which has insufficient initial fixation stability and is prone to tibial cortical damage, and to provide a tibial support prosthesis.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A tibial support prosthesis, the tibial support prosthesis comprising a support body and a connector,

[0007] The support body has a proximal bone side facing the connected end face of the tibia and a distal bone side away from the connected end face of the tibia, and the connector is inserted into the support body along the direction from the distal bone side to the proximal bone side.

[0008] The connector has an arc-shaped portion, the centerline of which is arc-shaped in its longitudinal section; the arc-shaped portion is used to move from the distal bone side to the proximal bone side of the support body so that the arc-shaped portion is inserted into the tibia.

[0009] In this design, during the installation of the tibial support prosthesis, a portion of the bone at the end face of the tibia is typically removed to expose the cancellous bone. The support body connects to this end face. The arc-shaped portion in this design can move from the distal to the proximal side of the support body, thus inserting into the cancellous bone of the tibia. This avoids cortical damage to the tibia caused by the conventional surgical method of creating a groove on the anterior side of the tibia and simplifies the procedure. Furthermore, the arc-shaped portion has an arc-shaped centerline in its longitudinal section, allowing it to move along this centerline during insertion into the tibia, facilitating the insertion process. Additionally, once inserted into the tibia, the arc-shaped portion can contact the tibia in multiple directions, such as along the bone axis and in multiple directions at an angle to the bone axis, thus improving the stability of the prosthesis in both vertical and anteroposterior directions. Finally, a connector passes through the support body, connecting the support body to the tibia after the arc-shaped portion is inserted.

[0010] Preferably, the connector is rotatably connected to the support body, and the arcuate portion rotates around the rotatable connection between the connector and the support body from the distal bone side to the proximal bone side of the support body.

[0011] In this design, the connector and the support body are connected by a rotating connection. During the surgery to install the tibial support prosthesis, the arc-shaped part of the connector can be inserted into the cancellous bone at the connected end face of the tibia around the rotating connection point. This installation method is simple and easy to operate.

[0012] Preferably, the connector further includes a rotating part and a first connecting part, the rotating part being rotatably connected to the body of the support, the first connecting part extending between the rotating part and the arcuate part, and both ends of the first connecting part being connected to the rotating part and the arcuate part respectively.

[0013] In this design, the connector is rotatably connected to the support body via a rotating part, and the arc-shaped part and the rotating part are connected via a first connecting part. The arc-shaped part can rotate relative to the support body around the rotating part.

[0014] Preferably, the first connecting portion is a fan-shaped rib, one end of which is connected to the rotating portion, and the other end is connected to the arc-shaped portion along the outer contour of the arc-shaped portion.

[0015] In this design, by adopting the above structural form, the connection length between the first connecting part and the arc-shaped part is increased, improving the overall reliability of the connector structure. When the arc-shaped part rotates around the rotating part, its rotation process is smoother. Furthermore, the rib plate structure reduces rotational displacement in all directions. In addition, the rib plate is also inserted into and anchored within the cancellous bone of the tibia, increasing the contact area between the connector and the tibia, further enhancing the stability of the connection.

[0016] Preferably, the first connecting part is a connecting rod, and there are multiple connecting rods. One end of each connecting rod is connected to the rotating part, and the other end is connected to the arc-shaped part at intervals along the outer contour of the arc-shaped part.

[0017] In this solution, by adopting the above structural form, multiple connecting rods can be connected to multiple positions on the outer contour of the arc-shaped part, thereby improving the stability of the connection and the smoothness of the rotation process of the arc-shaped part.

[0018] Preferably, the first connecting portion is a rib plate, and when the arc-shaped portion moves to the proximal side of the support body, the rib plate has a recess toward the edge of the support body.

[0019] In this design, by adopting the above structural form, the depression can form a clearance space to avoid interference with the femoral condyle.

[0020] Preferably, the first connecting part is a connecting rod, and when the arc-shaped part moves to the bone side of the support body, the connecting rod closest to the support body among the plurality of connecting rods has a preset distance from the support body.

[0021] In this design, by adopting the above structural form, an avoidance space can be created to prevent interference with the femoral condyle.

[0022] Preferably, the rotating part is cylindrical and is arranged in the body of the support body along a direction parallel to the plane of the support body, and the first connecting part is perpendicular to the rotating part.

[0023] In this design, the rotating part is located within the support body, which not only improves the stability of the connection with the support body but also avoids occupying external space of the support body, thus preventing an increase in the size of the prosthesis or interference with other structures. Furthermore, the rotating part is arranged parallel to the plane of the support body, allowing for efficient use of the support body's own space and resulting in a compact prosthesis structure. Additionally, the first connecting part is perpendicular to the rotating part, making the connection between the first connecting part and the curved part more stable and facilitating insertion of the first connecting part into the cancellous bone of the tibia.

[0024] Preferably, the interior of the support body has a mounting hole, and the rotating part is disposed within the mounting hole.

[0025] In this solution, the support body and the connector can be 3D printed as one piece. The rotating part is embedded and limited in the mounting hole of the support body. The rotating part will not come out of the mounting hole, thereby avoiding the rotating part from accidentally detaching from the support body and causing the connector to separate from the support body.

[0026] Preferably, the support body has a mounting groove that extends from the surface of the support body on the distal bone side to the proximal bone side of the support body; and the mounting groove includes a guide section and a limiting section, the guide section is inclined from the distal bone side to the proximal bone side, the limiting section has a limiting protrusion at the junction with the guide section, and the rotating part is disposed within the limiting section.

[0027] In this design, the surface of the support body is provided with a mounting groove. The rotating part and the support body can be separately installed and then assembled into one unit. Thus, the connector and the support body can be manufactured separately and then assembled into one unit. When the rotating part is installed in the support body, the rotating part can enter the mounting groove from the guide section and move to the limiting section. After the rotating part is installed, the limiting protrusion can restrict the position of the connector.

[0028] Preferably, the connector is slidably connected to the support body, and the arcuate portion slides along the sliding path of the connector and the support body from the distal bone side to the proximal bone side of the support body.

[0029] In this design, the connector and the support body are connected by a sliding connection. During the surgery to install the tibial support prosthesis, the arc-shaped part of the connector can slide along the sliding path of the connector on the support body and be inserted into the cancellous bone at the connected end face of the tibia. This installation method is simple and easy to operate.

[0030] Preferably, the tibial support prosthesis further includes a guide and a guide groove, one of the arcuate portion and the support body is connected to the guide, and the other is provided with the guide groove, the guide and the guide groove being slidably engaged.

[0031] In this solution, by adopting the above structural form, the cooperation between the guide groove and the guide member forms a sliding path for the connector to move relative to the support body. This structure is simple, and the connector can be connected to the cancellous bone along the sliding path, making operation convenient.

[0032] Preferably, the guide member is connected to the arc-shaped portion, and the guide groove passes through the support body along the direction from the distal bone side to the proximal bone side. The extension direction of the guide member and the guide trajectory of the guide groove are both adapted to the center line of the arc-shaped portion.

[0033] In this design, the arc-shaped part can move along the guide track of the guide groove via a guide member, improving the stability and accuracy of the arc-shaped part's movement. Furthermore, the extension direction of the guide member and the guide track of the guide groove are adapted to the arc-shaped part, ensuring that the sliding path of the arc-shaped part conforms to its own structure, which facilitates the smooth insertion of the arc-shaped part.

[0034] Preferably, the guide includes a first guide surface, a second guide surface, and a third guide surface. The first guide surface is spaced apart from the arc-shaped portion, and the second guide surface and the third guide surface are respectively disposed on both sides of the first guide surface and connected to the arc-shaped portion.

[0035] In this design, the guide component includes multiple guide surfaces, which can improve the stability of the guide component's guidance.

[0036] Preferably, the first guide surface, the second guide surface, and the third guide surface form a triangular cross-section.

[0037] In this design, the guide has a triangular cross-section, with one of the apexes facing the arc-shaped portion and used to connect with it, thereby improving the stability of the guide near and away from the arc-shaped portion.

[0038] Preferably, the support body has an extension on the surface near the bone, and the guide groove extends through the support body and the extension.

[0039] In this solution, by setting an extension section, the length of the guide groove can be extended, the guide area can be increased, and the guide performance can be improved.

[0040] Preferably, the tibial support prosthesis further includes a second connecting portion and a second limiting portion, the second connecting portion being connected to the guide member and extending in a direction away from the arcuate portion; the second limiting portion is disposed at the extending edge of the second connecting portion toward the support body;

[0041] The support body is provided with a second limiting groove, and the second limiting part is engaged in the second limiting groove. The trajectory of the second limiting groove is adapted to the center line of the arc-shaped part.

[0042] In this design, the second limiting part restricts the maximum sliding distance of the arc-shaped part relative to the support body, preventing the arc-shaped part from moving excessively and increasing the connection strength between the arc-shaped part and the support body. The second connecting part, serving as the connecting component between the second limiting part and the arc-shaped part, also acts as a guide, increasing the contact range between the arc-shaped part and the support body, as well as the contact area between the arc-shaped part and the cancellous bone, thereby improving the connection performance between the arc-shaped part and the support body and the cancellous bone.

[0043] Preferably, the second connecting portion is a rib, the second limiting portion is cylindrical, and the plane containing the second connecting portion is perpendicular to the axis of the second limiting portion.

[0044] In this solution, by adopting the above structural form, the structure is simple, and the ribs can further increase the strength of the overall structure. The cylindrical shape and the ribs can form a snap-fit ​​structure, which is snapped into the second limiting groove of the support body.

[0045] Preferably, the number of the second limiting portions is at least one, and the plurality of the second limiting portions are arranged at intervals along the extended edge of the second connecting portion.

[0046] In this design, multiple second limiting parts arranged at intervals can connect with the support body at multiple positions of the connector, thereby improving the overall structural strength after the connector and the support body are connected, making the overall structure more stable.

[0047] Preferably, when the arcuate portion moves to the proximal side of the support body, the second connecting portion has a recess toward the edge of the support body, and the second limiting portion is disposed in the recess.

[0048] In this design, by adopting the above structural form, an avoidance space can be created to prevent interference with the femoral condyle.

[0049] Preferably, the arcuate portion has a circular arc shape along its centerline in its longitudinal section;

[0050] Alternatively, the arc-shaped portion may have a convex curve with a preset curvature along the centerline of its longitudinal section.

[0051] In this design, the centerline of the arc-shaped portion can have various linear forms. The preset curvature is the curvature corresponding to the arc-shaped portion being implanted into the tibia. Those skilled in the art can design it according to their needs. When it is an arc, the arc-shaped portion can rotate around a center point with a uniform trajectory, allowing the arc-shaped portion to be gradually inserted into and anchored within the cancellous bone.

[0052] Preferably, along the direction from the distal bone side to the proximal bone side, the lateral dimension of the arcuate portion gradually decreases, and the thickness of the arcuate portion gradually decreases.

[0053] In this design, the transverse and longitudinal directions are perpendicular to each other. The curved portion, through the above structural form, creates a double-tapered design, resulting in better and more stable compression during implantation. It also provides a compressive force to the tibial support.

[0054] Preferably, the surface and sides of the arc-shaped portion are provided with serrations, and the tips of the serrations face the direction of the tibia.

[0055] In this design, by adopting the above structural form, it is possible to facilitate the implantation of the arc-shaped part into the tibia and improve the resistance to withdrawal of the arc-shaped part.

[0056] Preferably, the side of the arc-shaped portion away from the tibia is provided with a limiting protrusion, and the surface of the support body located on the distal bone side is provided with a first limiting groove, which is used to restrict the movement of the limiting protrusion toward the tibia.

[0057] In this solution, the limiting boss can prevent the curved part from sinking excessively when the connector is implanted.

[0058] Preferably, the end of the arc-shaped portion away from the tibia is provided with a locking portion, and the surface of the support body located on the proximal side of the bone is provided with a locking groove, and the locking portion is locked into the locking groove.

[0059] In this design, when the connector is implanted into the cancellous bone, the locking part engages within the locking groove, preventing the curved part from dislodging from the tibia.

[0060] Preferably, at least one of the surface of the arcuate portion, the first connecting portion of the connector, the second connecting portion of the connector, and the surface of the support body located on the proximal side of the bone is provided with a porous structure.

[0061] In this solution, by adopting the above structural form, the porous structure provides surface roughness, which improves the initial stability of the connector and the support body with the bone, while rapidly achieving bone ingrowth and improving the medium- and long-term stability of the connector.

[0062] Preferably, there are multiple arc-shaped portions, which are arranged sequentially at intervals.

[0063] In this design, multiple arc-shaped segments can further improve fixation stability, and these segments are arranged sequentially at intervals. During surgical implantation, multiple arc-shaped segments can be connected to cancellous bone in a single implantation.

[0064] Preferably, there are multiple connectors, which are spaced apart on the support body.

[0065] In this approach, for surgeries with a large implantation space, such as tibial support prosthesis implantation for total knee arthroplasty, multiple connectors can further enhance the stability of the connection between the prosthesis and the bone.

[0066] Preferably, the tibial support prosthesis further includes a fixation pin, which is connected to the surface of the support body on the proximal side of the bone and located on both sides of the arcuate portion; along the axial direction of the fixation pin, the outer surface of the fixation pin is provided with a plurality of longitudinal grooves; along the circumferential direction of the fixation pin, the outer surface of the fixation pin is provided with a plurality of serrations.

[0067] In this solution, the fixing pins can play an early fixing role, and the above-mentioned structural form of the fixing pins can improve the fixing effect of the fixing pins.

[0068] The significant advantages of this invention are as follows: In the installation of a tibial support prosthesis, a portion of the bone is typically removed from the end face of the tibia to expose the cancellous bone. The support body connects to this end face. The arc-shaped portion in this design can move from the distal to proximal side of the support body, thereby inserting into the cancellous bone of the tibia. This avoids damage to the tibial cortex caused by slotting on the anterior side of the tibia and simplifies the procedure. Furthermore, the arc-shaped portion has an arc-shaped centerline in its longitudinal section. During insertion into the tibia, it can move along this arc-shaped centerline, facilitating the insertion process. Additionally, once inserted into the tibia, the arc-shaped portion can contact the tibia in multiple directions, such as along the bone axis and in multiple directions with an angle to the bone axis, thus improving the stability of the prosthesis in both vertical and anteroposterior directions. Finally, a connector passes through the support body, allowing connection between the support body and the tibia after the arc-shaped portion is inserted. Attached Figure Description

[0069] Figure 1 This is a schematic diagram of a tibial support prosthesis provided in Embodiment 1 of the present invention, wherein the connector is in a state before being connected to the tibia;

[0070] Figure 2 This is a schematic diagram of a tibial support prosthesis provided in Embodiment 1 of the present invention, wherein the connector is in the state after being connected to the tibia;

[0071] Figure 3 This is a schematic diagram of the connector provided in Embodiment 1 of the present invention;

[0072] Figure 4 This is a schematic diagram of the connector provided in Embodiment 1 of the present invention;

[0073] Figure 5 This is a schematic diagram of the connector provided in Embodiment 1 of the present invention;

[0074] Figure 6 This is a schematic diagram of a connection structure between the connector and the support body in Embodiment 1 of the present invention;

[0075] Figure 7 for Figure 6 A cross-sectional schematic diagram of the main body of the central support;

[0076] Figure 8 for Figure 6 A top view of the tibialis prosthesis;

[0077] Figure 9 This is a schematic diagram of another connection structure between the connector and the support body in Embodiment 1 of the present invention;

[0078] Figure 10 for Figure 9A cross-sectional schematic diagram of the main body of the central support;

[0079] Figure 11 for Figure 9 A top view of the tibialis prosthesis;

[0080] Figure 12 This is a partial enlarged view of the connector in Embodiment 1 of the present invention;

[0081] Figure 13 This is a partial cross-sectional view of the connector and the support body in Embodiment 1 of the present invention;

[0082] Figure 14 This is a partially enlarged cross-sectional view of the connector and the support body in Embodiment 1 of the present invention;

[0083] Figure 15 This is a schematic diagram of the structure of the support body in Embodiment 1 of the present invention;

[0084] Figure 16 This is a schematic diagram of the connector provided in Embodiment 2 of the present invention;

[0085] Figure 17 This is a schematic diagram of the structure of the support body provided in Embodiment 2 of the present invention;

[0086] Figure 18 This is a top view of the tibial support prosthesis provided in Embodiment 2 of the present invention;

[0087] Figure 19 This is a schematic diagram of the tibial support prosthesis provided in Embodiment 2 of the present invention;

[0088] Figure 20 This is a cross-sectional schematic diagram of the tibial support prosthesis provided in Embodiment 2 of the present invention;

[0089] Figure 21 This is a cross-sectional schematic diagram of the tibial support prosthesis provided in Embodiment 2 of the present invention;

[0090] Figure 22 This is a cross-sectional schematic diagram of the support body provided in Embodiment 2 of the present invention;

[0091] Figure 23 This is a cross-sectional schematic diagram of the support body provided in Embodiment 2 of the present invention;

[0092] Figure 24 This is a schematic diagram of the connector provided in Embodiment 3 of the present invention;

[0093] Figure 25 This is a top view of the tibial support prosthesis provided in Embodiment 3 of the present invention;

[0094] Figure 26 This is a cross-sectional schematic diagram of the tibial support prosthesis provided in Embodiment 3 of the present invention;

[0095] Figure 27 This is a cross-sectional schematic diagram of the tibial support prosthesis provided in Embodiment 3 of the present invention;

[0096] Figure 28 This is a schematic diagram of the tibial support prosthesis provided in Embodiment 4 of the present invention;

[0097] Figure 29 This is a top view of the tibial support prosthesis provided in Embodiment 4 of the present invention.

[0098] Explanation of reference numerals in the attached figures

[0099] Tibial support prosthesis 1, support body 10, proximal bone side 11, distal bone side 12, mounting portion 13, first through groove 131, second through groove 132, third through groove 133, second limiting groove 134, edge portion 14, mounting hole 15, mounting groove 16, guide section 161, limiting section 162, limiting protrusion 163, abutment portion 17, slot 18, extension portion 19, connector 20, longitudinal 21, transverse 22, arc-shaped portion 1 00, serration 110, limiting boss 120, snap-fit ​​part 130, rotating part 210, first connecting part 220, rib 221, recess 222, guide member 310, first guide surface 311, second guide surface 312, third guide surface 313, transition member 314, guide groove 320, second connecting part 410, second limiting part 420, multi-hole structure 30, fixing nail 40, longitudinal groove 41, serration 42. Detailed Implementation

[0100] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0101] This invention provides a tibial support prosthesis 1, such as... Figures 1-29 As shown, the tibial support prosthesis 1 includes a support body 10 and a connector 20. The support body 10 has a proximal bone side 11 facing the connected end face of the tibia and a distal bone side 12 away from the connected end face of the tibia. The connector 20 is inserted into the support body 10 along the direction from the distal bone side 12 to the proximal bone side 11.

[0102] The connector 20 has an arc-shaped portion 100, the center line of which is arc-shaped; the arc-shaped portion 100 is used to move from the distal bone side 12 to the proximal bone side 11 of the support body 10 so that the arc-shaped portion 100 is inserted into the tibia.

[0103] In the installation of the tibial support prosthesis 1, a portion of the bone is typically removed from the end face of the tibia to expose the cancellous bone. The support body 10 is used to connect to this end face; specifically, the end face of the tibia is usually cut into a plane, which serves as the connection end face of the tibia, such as... Figure 1 and Figure 2 As shown, the surface of the support body 10 on the proximal side 11 is typically planar, and this surface can cover and connect to the connected end face of the tibia. The connector 20 passes through the support body 10, and when the arcuate portion 100 is inserted and anchored within the tibia, it connects the support body 10 to the tibia. The arcuate portion 100 can move from the distal side 12 to the proximal side 11 of the support body 10, thereby inserting into the cancellous bone of the tibia. This avoids damage to the tibial cortex caused by conventional surgical groove opening on the anterior side of the tibia, and also allows direct connection using the cancellous bone exposed after bone removal, avoiding additional surgical procedures and simplifying the operation.

[0104] Among them, such as Figure 1 and Figure 2 As shown, the arc-shaped portion 100 is a solid structure arranged from the distal bone side 12 to the proximal bone side 11. The longitudinal direction 21 refers to the direction corresponding to the arc-shaped portion 100's own structure, specifically roughly along the direction from the distal bone side 12 to the proximal bone side 11, which is also the direction of movement when the arc-shaped portion 100 is inserted into the tibia. When the prosthesis is connected to the tibia, it is usually arranged horizontally on the connected end face of the tibia, with the arc-shaped portion 100 arranged vertically. This longitudinal direction 21 is also the vertical direction when the prosthesis is connected to the tibia. In specific implementations, such as... Figure 3 and Figure 4 As shown, the arc-shaped portion 100 is provided with a symmetrical structure. This symmetrical structure can improve the balance of the connection force at various points when the arc-shaped portion 100 is connected to the tibia, thereby further improving the stability of the connection. Figure 4 The image shows the longitudinal line 21 of the arcuate portion 100 at its plane of symmetry. (See image for details.) Figure 3 and Figure 5 As shown, the arc-shaped portion 100 is a structure with a certain thickness, and the center line is a line passing through the center of each thickness position of the arc-shaped portion 100. The center line of the arc-shaped portion 100 in its own longitudinal section is arc-shaped. When the arc-shaped portion 100 is inserted into the tibia, it can move along the arc-shaped center line, which is beneficial to the insertion process of the arc-shaped portion 100.

[0105] When the curved portion 100 is inserted into the tibia, it not only increases the contact area with the tibia but also allows for contact with the tibia in multiple directions, such as along the bone axis and in multiple directions at an angle to the bone axis, thereby improving the stability of the prosthesis in both vertical and anterior-posterior directions. Figure 2 As shown, when the arc-shaped portion 100 is inserted into and anchored in the tibia, the arc-shaped portion 100 is connected to the tibia in the vertical direction, the anterior-posterior direction, and the transition direction between the vertical and anterior-posterior directions, thereby improving the stability of the connection with the tibia in multiple directions.

[0106] Furthermore, the centerline of the arc-shaped portion 100 in its longitudinal section is a convex curve with a preset curvature. The centerline of the arc-shaped portion 100 can have various linear forms, and the convex curve facilitates insertion into the tibia and compaction and close fit with the cancellous bone of the tibia. The preset curvature is the curvature corresponding to the arc-shaped portion 100 that allows it to be implanted into the tibia, and those skilled in the art can design it according to their needs.

[0107] Preferably, the arc-shaped portion 100 has a circular arc-shaped centerline in its longitudinal section. When it is circular, the arc-shaped portion 100 can rotate around a center point with a uniform trajectory, allowing it to gradually insert into and anchor itself within the cancellous bone. Figure 5 As shown, the arc-shaped part 100 with a central arc can rotate around its center. The trajectory of the arc-shaped part 100 is consistent at all positions. When it is inserted into the tibia, it can evenly compact the cancellous bone and avoid gaps.

[0108] In the following embodiments, taking the center line of the arc-shaped portion 100 as an example as an arc, a specific implementation of the connector 20 and the support body 10 is provided. However, in specific implementations, those skilled in the art can set the arc-shaped portion 100 to other line shapes as needed. Therefore, the scope of protection of the present invention should not be limited to the following embodiments.

[0109] Example 1

[0110] like Figure 1 and Figure 2 As shown, the connector 20 is rotatably connected to the support body 10, and the arc-shaped portion 100 rotates around the rotatable connection point between the connector 20 and the support body 10 from the distal bone side 12 to the proximal bone side 11 of the support body 10. During the surgery to install the tibial support prosthesis 1, the arc-shaped portion 100 of the connector 20 can be inserted into the cancellous bone at the connected end face of the tibia around the rotatable connection point. This installation method is simple and easy to operate.

[0111] like Figure 5 As shown, when the center line of the arc-shaped portion 100 is an arc, the rotatable connection between the connector 20 and the support body 10 is preferably at the center of the arc.

[0112] like Figure 1 , Figure 3 and Figure 4 As shown, the connector 20 also includes a rotating part 210 and a first connecting part 220. The rotating part 210 is rotatably connected to the support body 10, and the first connecting part 220 extends between the rotating part 210 and the arc-shaped part 100, and the two ends of the first connecting part 220 are respectively connected to the rotating part 210 and the arc-shaped part 100.

[0113] like Figure 1As shown, the connector 20 spans and passes through the support body 10. The rotating part 210 and the arcuate part 100 are located at opposite ends of the support body 10. When the tibial support prosthesis 1 is connected to the tibia, the rotating part 210 and the arcuate part 100 can connect to the support body 10 at opposite ends, making the connection between the support body 10 and the tibia more stable. Preferably, the rotating part 210 is located at the center of the arcuate part 100. When the arcuate part 100 is inserted into the cancellous bone, it rotates around the rotating part 210, making the implantation process smoother. The first connecting part 220 connects the arcuate part 100 and the rotating part 210, and extends between the arcuate part 100 and the rotating part 210, spanning the support body 10. Compared with the lateral dimension 22 of the arc-shaped portion 100, the thickness of the first connecting portion 220 is smaller than the lateral dimension 22 of the arc-shaped portion 100, so the opening of the hole on the support body 10 through which the first connecting portion 220 passes is smaller, reducing the impact on the structural strength of the support body 10.

[0114] In specific implementation, the first connecting part 220 can adopt various structural forms. Two specific implementation methods will be provided below, but the scope of protection of the present invention should not be limited to the following implementation methods.

[0115] As a preferred implementation method, such as Figure 2 and Figure 5 As shown, the first connecting part 220 is a fan-shaped rib 221. One end of the rib 221 is connected to the rotating part 210, and the other end is connected to the arc part 100 along the outer contour of the arc part 100.

[0116] like Figure 5 , Figure 6 and Figure 9 As shown, the rib plate 221 connects from one end of the arc-shaped portion 100 to the other end along the longitudinal direction 21 of the arc-shaped portion 100, increasing the connection length between the first connecting portion 220 and the arc-shaped portion 100, improving the overall reliability of the connector 20 structure, and making the rotation process smoother when the arc-shaped portion 100 rotates around the rotating portion 210. Furthermore, the rib plate 221 structure can reduce rotational displacement in all directions. Moreover, when the arc-shaped portion 100 is connected to the inside of the tibia, the rib plate 221 is also inserted into and anchored within the cancellous bone of the tibia, increasing the contact area between the connector 20 and the tibia, further improving the stability of the connection. Further, as... Figure 4 As shown, the rib 221 is connected at the middle position of the arc-shaped portion 100, preferably at the position where the plane of symmetry of the rib 221 is located.

[0117] like Figure 6 and Figure 9 As shown, when the arcuate portion 100 moves to the proximal bone side 11 of the support body 10, the rib plate 221 has a recess 222 at its edge facing the support body 10. The recess 222 can create a clearance space to avoid interference with the femoral condyle.

[0118] In another preferred embodiment, the first connecting part 220 is a connecting rod (not shown in the figure). Multiple connecting rods are provided, with one end connected to the rotating part 210 and the other end spaced along the outer contour of the arc-shaped part 100. The multiple connecting rods can connect to multiple positions on the outer contour of the arc-shaped part 100, thereby improving the stability of the connection and the smoothness of the rotation process of the arc-shaped part 100.

[0119] When the arc-shaped portion 100 moves to the proximal side 11 of the support body 10, the connecting rod closest to the support body 10 among the multiple connecting rods has a preset distance from the support body 10. This creates a clearance space, preventing interference with the femoral condyle.

[0120] like Figure 3 and Figure 4 As shown, the rotating part 210 is cylindrical and is arranged within the support body 10 along a direction parallel to the plane of the support body 10. The first connecting part 220 is perpendicular to the rotating part 210. The rotating part 210's placement within the support body 10 not only improves the stability of its connection with the support body 10 but also avoids occupying external space, thus preventing an increase in the prosthesis's volume or interference with other structures. Furthermore, the parallel arrangement of the rotating part 210 to the plane of the support body 10 allows for efficient use of the support body 10's own space, resulting in a compact prosthesis structure. Additionally, the perpendicularity between the first connecting part 220 and the rotating part 210 makes the connection between the first connecting part 220 and the arc-shaped part 100 more stable and facilitates insertion of the first connecting part 220 into the cancellous bone of the tibia.

[0121] like Figure 4 As shown, the first connecting part 220 is connected to the outer wall of the cylindrical rotating part 210, specifically at the middle position of the cylindrical rotating part 210. Figure 3 and Figure 4 As shown, the connector 20 has a symmetrical structure. The first connecting part 220 is located on the plane of symmetry of the connector 20. The arc-shaped part 100 and the rotating part 210 both extend to both sides of the plane of symmetry, which improves the balance and stability of the connection between the connector 20 and the tibia. Figure 5 As shown, the axis of the cylindrical rotating part 210 coincides with the center of the arc-shaped part 100.

[0122] like Figure 6 and Figure 9 As shown, the support body 10 is a plate-like structure with a certain thickness, including a mounting portion 13 and an edge portion 14. A connector 20 is connected to and passes through the mounting portion 13. The edge portion 14 is located on the distal bone side 12 of the connector 20 and is connected to the mounting portion 13. Figure 1 As shown, the edge portion 14 is disposed around the edge of the mounting portion 13. In specific implementations, the connector 20 and the support body 10 can be integrated in various ways. Two specific embodiments are provided below, but the scope of protection of the present invention should not be limited to the following embodiments.

[0123] As a preferred implementation method, such as Figure 6 , Figure 7 and Figure 8 As shown, the interior of the support body 10 has a mounting hole 15, and the rotating part 210 is disposed within the mounting hole 15. The support body 10 and the connector 20 can be 3D printed as a whole. The rotating part 210 is embedded and limited within the mounting hole 15 of the support body 10, and the rotating part will not come out of the mounting hole, thereby preventing the rotating part 210 from accidentally detaching from the support body 10 and causing the connector 20 to separate from the support body 10.

[0124] like Figure 7 As shown, mounting hole 15 is provided within mounting portion 13. Figure 8 As shown, the mounting portion 13 is provided with a first through groove 131 through which the arc-shaped portion 100 and the first connecting portion 220 pass, and the first through groove 131 is T-shaped.

[0125] As another preferred implementation, such as Figure 9 , Figure 10 and Figure 11 As shown, the support body 10 has a mounting groove 16, which extends from the surface of the support body 10 on the distal bone side 12 towards the proximal bone side 11. The mounting groove 16 includes a guide section 161 and a limiting section 162. The guide section 161 is inclined from the distal bone side 12 towards the proximal bone side 11. The limiting section 162 has a limiting protrusion 163 at the junction with the guide section 161. The rotating part 210 is disposed within the limiting section 162. The surface of the support body 10 is provided with the mounting groove 16. The rotating part 210 and the support body 10 can be separately disposed and then assembled into one unit, so that the connecting member 20 and the support body 10 can be manufactured separately and then assembled into one unit. When the rotating part 210 is installed in the support body 10, the rotating part 210 can enter the mounting groove 16 from the guide section 161 and move to the limiting section 162. After the rotating part 210 is installed, the limiting protrusion 163 can restrict the position of the connecting member 20.

[0126] like Figure 10As shown, the limiting segment 162 is positioned near the edge of the mounting portion 13, the guide segment 161 is inclined towards the edge of the mounting portion 13, and the limiting protrusion 163 is positioned on the distal side 12 of the mounting portion 13. This structural arrangement allows the rotating part 210 to be confined within the mounting groove 16 without the need for additional components. In other embodiments, the mounting groove 16 can be configured in other ways, or the mounting groove 16 can be used in conjunction with other components to achieve the mounting of the rotating part 210. For example... Figure 11 As shown, the mounting groove 16 is formed on the surface of the distal bone side 12 of the mounting portion 13.

[0127] When the rotating part 210 is installed inside the support body 10, the connector 20 can be rotatably connected to the support body 10 through the rotating part 210, so that the arc-shaped part 100 can rotate around the rotating part 210 to be inserted into the tibia.

[0128] like Figure 3 and Figure 4 As shown, along the direction from the distal bone side 12 to the proximal bone side 11, the transverse dimension 22 of the arcuate portion 100 gradually decreases, as... Figure 5 As shown, the thickness of the arc-shaped portion 100 gradually decreases. The transverse direction 22 and the longitudinal direction 21 are perpendicular to each other. By adopting the above structural form, the arc-shaped portion 100 forms a double-tapered design, resulting in better and more stable compression during implantation. It also provides a compressive force to the tibial support.

[0129] like Figure 3 and Figure 4 As shown, the transverse dimension 22 of the arc-shaped portion 100 is largest at one end, and gradually decreases from that end until it becomes a pointed end, which facilitates the insertion of the arc-shaped portion 100 into the tibia. Figure 5 As shown, the thickness is greatest at the position where the transverse dimension 22 of the arc-shaped portion 100 is largest, and the thickness gradually decreases from that end until it becomes the smallest at the other end, forming a pointed tip. The overall structure of the arc-shaped portion 100 forms a double-tapered structure where the size and thickness are largest at one end and gradually decrease to the smallest at the other end.

[0130] like Figure 3 , Figure 4 and Figure 5 As shown, the surface and sides of the arc-shaped portion 100 are provided with serrations 110, with the tips of the serrations 110 pointing towards the tibia. This facilitates the implantation of the arc-shaped portion 100 into the tibia and improves the resistance to withdrawal of the arc-shaped portion 100.

[0131] like Figure 2 and Figure 3As shown, the surfaces of the arcuate portion 100 furthest from the rotating portion 210 and near the rotating portion 210 are provided with serrations 110, the tooth pitch of which is arranged along the transverse direction 22 of the arcuate portion 100. Figure 3 and Figure 4 As shown, both sides of the arc-shaped portion 100 are provided with serrations 110.

[0132] like Figure 12 and Figure 13 As shown, a limiting protrusion 120 is provided on the side of the arc-shaped portion 100 away from the tibia, and a first limiting groove is provided on the surface of the support body 10 on the distal bone side 12. The first limiting groove is used to restrict the movement of the limiting protrusion 120 towards the tibia. The limiting protrusion 120 can prevent the arc-shaped portion 100 from sinking excessively when the connector 20 is implanted.

[0133] like Figure 12 As shown, limiting protrusions 163 are provided on both sides of the arc-shaped portion 100, and the limiting protrusions 163 extend laterally 22 from the side of the arc-shaped portion 100. Figure 13 As shown, the through groove on the mounting part 13 through which the arc-shaped part 100 passes is provided with an abutment part 17 that abuts against the limiting protrusion 163. When the connector 20 is connected to the tibia, the limiting protrusion 163 abuts against the abutment part 17.

[0134] like Figure 12 and Figure 14 As shown, the end of the arc-shaped portion 100 away from the tibia is provided with a locking portion 130, and the surface of the support body 10 located on the proximal side 11 is provided with a locking groove 18, in which the locking portion 130 is locked. When the connector 20 is implanted into the cancellous bone, the locking portion 130 is locked in the locking groove 18, which can prevent the arc-shaped portion 100 from exiting the tibia.

[0135] like Figure 12 As shown, the end of the arc-shaped portion 100 is provided with a plurality of snap-fit ​​portions 130, which are arranged at intervals along the transverse direction 22 of the arc-shaped portion 100. Figure 14 As shown, the locking part 130 is a hook, and there is a gap between the locking part 130 and the arc-shaped part 100. When the arc-shaped part 100 moves into place towards the tibia, the locking part 130 can be compressed to enter the locking groove 18. After the locking part 130 enters the locking groove 18, the locking part 130 can return to its initial state and lock with the locking groove 18.

[0136] In specific implementation, at least one of the surfaces of the arcuate portion 100, the first connecting portion 220 of the connector 20, and the surface of the support body 10 located near the bone side 11 is provided with a porous structure 30. This porous structure 30 provides surface roughness, improving the initial stability of the connector 20 and the support body 10 with the bone, while simultaneously promoting rapid bone ingrowth and improving the medium- and long-term stability of the connector 20. The porosity of the trabecular porous structure 30 is 50%–95%, and the pore size is 100–1000 μm.

[0137] like Figure 3 and Figure 4 As shown, both the surface of the arc-shaped portion 100 away from the rotating portion 210 and the surface facing the rotating portion 210 can be provided with a porous structure 30. For example... Figure 2 As shown, both sides of the first connecting portion 220 can be provided with a porous structure 30. For example... Figure 2 As shown, the porous structure 30 is provided on the surface of the support body 10 near the bone side 11.

[0138] In practical implementation, the connector 20 may have one or more arc-shaped portions 100. When there are multiple arc-shaped portions 100, they are arranged sequentially at intervals. Multiple arc-shaped portions 100 can further improve fixation stability, and when arranged sequentially at intervals, multiple arc-shaped portions 100 can be connected to cancellous bone in a single implantation during surgery.

[0139] In this design, multiple arc-shaped portions 100 have the same curvature at corresponding positions, resulting in consistent trajectories for the multiple arc-shaped portions 100, which facilitates implantation. For example... Figure 5 As shown, both arc-shaped portions 100 are circular arcs, and their rotation centers coincide, both coinciding with the axis of the rotating portion 210. Furthermore, the longitudinal dimension 21 of the arc-shaped portion 100 closer to the rotating portion 210 can be smaller than the longitudinal dimension 21 of the arc-shaped portion 100 farther from the rotating portion 210. The arc-shaped portion 100 farther from the rotating portion 210 is located at the end of the first connecting portion 220, while the arc-shaped portion 100 closer to the rotating portion 210 is located on the first connecting portion 220.

[0140] like Figure 13 and Figure 15 As shown, the tibial support prosthesis 1 also includes fixation pins 40, which are connected to the surface of the support body 10 on the proximal side 11 and located on both sides of the arcuate portion 100. Along the axial direction of the fixation pin 40, its outer surface has multiple longitudinal grooves 41; along the circumferential direction of the fixation pin 40, its outer surface has multiple serrations 42. The fixation pin 40 can provide early fixation, and through the above-mentioned structural form, the fixation effect of the fixation pin 40 can be improved.

[0141] like Figure 15As shown, the fixation pin 40 has a columnar structure and is arranged at an angle to the support body 10, thereby further improving the connection performance between the support body 10 and the tibia. Figure 15 The tips of the serrations 42 point towards the tibia, thereby further enhancing the anti-retraction performance of the fixation pin 40. For example... Figure 13 As shown, both sides of the arc-shaped portion 100 are provided with fixing nails 40, and as shown in the figure. Figure 15 As shown, the two fixing pins 40 can be arranged front and back. Furthermore, the fixing pins 40 can be a solid structure or a combination of porous and solid structures.

[0142] Example 2

[0143] like Figures 16-23 As shown, this embodiment provides another connection method between the connector 20 and the support body 10. The difference between this embodiment and Embodiment 1 is that in this embodiment, the connector 20 and the support body 10 are slidably connected, and the arc-shaped portion 100 slides along the sliding path of the connector 20 and the support body 10 from the distal bone side 12 to the proximal bone side 11 of the support body 10. During the surgery of installing the tibial support prosthesis 1, the arc-shaped portion 100 of the connector 20 can be inserted into the cancellous bone at the connected end face of the tibia along the sliding path of the connector 20 on the support body 10. This installation method is simple and easy to operate.

[0144] In practical implementation, the tibial support prosthesis 1 also includes a guide 310 and a guide groove 320. One of the arcuate portion 100 and the support body 10 is connected to the guide 310, and the other is provided with the guide groove 320. The guide 310 and the guide groove 320 are slidably engaged. The engagement between the guide groove 320 and the guide 310 forms a sliding path for the connector 20 to move relative to the support body 10. This structure is simple, and the connector 20 can be connected to the cancellous bone along this sliding path, making operation convenient.

[0145] The following description uses an example of a guide member 310 being disposed on the arc-shaped portion 100 and a guide groove 320 being disposed on the support body 10 to further illustrate the embodiments of the present invention. In other embodiments, the guide member 310 may also be disposed on the support body 10 and the guide groove 320 may be disposed on the arc-shaped portion 100, and those skilled in the art may configure them according to their needs.

[0146] like Figure 16 and Figure 17As shown, the guide member 310 is connected to the arc-shaped portion 100, and the guide groove 320 passes through the support body 10 along the direction from the distal bone side 12 to the proximal bone side 11. The extension direction of the guide member 310 and the guide trajectory of the guide groove 320 are both adapted to the centerline of the arc-shaped portion 100. The arc-shaped portion 100 can move along the guide trajectory of the guide groove 320 through the guide member 310, improving the stability and accuracy of the movement of the arc-shaped portion 100. Furthermore, the extension direction of the guide member 310 and the guide trajectory of the guide groove 320 are adapted to the arc-shaped portion 100, so that the sliding path of the arc-shaped portion 100 conforms to its own structure, which is conducive to the smooth insertion of the arc-shaped portion 100. Specifically, the extension direction of the guide member 310 and the guide trajectory of the guide groove 320 are both adapted to the centerline of the arc-shaped portion 100, so that the curvature of the guide member 310 and the guide groove 320 at corresponding positions is the same as the curvature of the corresponding position on the center of the arc-shaped portion 100. Figure 21 As shown, when the arc-shaped part 100 is arc-shaped, the extension direction of the guide member 310 and the guide trajectory of the guide groove 320 are also arc-shaped.

[0147] like Figure 16 As shown, the guide member 310 includes a first guide surface 311, a second guide surface 312, and a third guide surface 313. The first guide surface 311 is spaced apart from the arc-shaped portion 100. The second guide surface 312 and the third guide surface 313 are respectively disposed on both sides of the first guide surface 311 and connected to the arc-shaped portion 100. This improves the stability of the guide member 310. Figure 18 As shown, the connection point between the guide member 310 and the arc-shaped portion 100 is located at the middle of the arc-shaped portion 100. The second guide surface 312 and the third guide surface 313 are connected to the inner surface of the arc-shaped portion 100. The first guide surface 311, the second guide surface 312, and the third guide surface 313 can form various cross-sectional shapes, such as rectangles or triangles. In other embodiments, the guide member 310 may have more guide surfaces, thereby further increasing the guiding area and improving the stability of the guide.

[0148] like Figure 16 and Figure 18 As shown, the first guide surface 311, the second guide surface 312, and the third guide surface 313 form a triangular cross-section. The guide member 310 has a triangular cross-section, with one of the apexes of the triangle facing the arc-shaped portion 100 and used to connect with the arc-shaped portion 100, thereby improving the stability of the guide member 310 at various locations near and away from the arc-shaped portion 100.

[0149] like Figure 16 and Figure 18As shown, the tips of the second guide surface 312 and the third guide surface 313 face the arc-shaped portion 100, and the second guide surface 312 and the third guide surface 313 are connected to the arc-shaped portion 100 by a strip-shaped transition member 314. The transition member 314 has a rectangular cross-section, and its size is smaller than the structure formed by the first guide surface 311, the second guide surface 312, and the third guide surface 313. This transition member 314 enhances the connection strength between the guide member 310 and the arc-shaped portion 100. Furthermore, the transition member 314 also serves a guiding function, improving guiding performance. Figure 16 As shown, each edge of the guide member 310 is chamfered.

[0150] like Figure 17 As shown, the mounting portion 13 of the support body 10 has a second through groove 132, which is adapted to the structure of the connector 20. The second through groove 132 is provided with a guide groove 320, and the inner sidewall of the guide groove 320 is in contact with each guide surface of the guide member 310.

[0151] like Figure 22 and Figure 23 As shown, the support body 10 has an extension 19 on the surface near the bone side 11, and a guide groove 320 passes through the support body 10 and the extension 19. This can extend the length of the guide groove 320, increase the guiding area, and improve the guiding performance.

[0152] like Figure 20 As shown, when the arc-shaped portion 100 is connected to the tibia, the extension portion 19 also fits against the guide member 310, which can improve the connection performance between the arc-shaped portion 100 and the support body 10. Furthermore, after the arc-shaped portion 100 is connected to the tibia, the arc-shaped portion 100 can be located below the surface of the distal bone side 12 of the support body 10.

[0153] The structure of the arc-shaped portion 100 in this embodiment is basically the same as that in Embodiment 1. It also has a limiting boss 120, a snap-fit ​​portion 130, serrations 110, and a porous structure 30, and can also be formed into a double-tapered design. In addition, the structure of the support body 10 is basically the same as that in Embodiment 1, and can also be equipped with fixing nails 40.

[0154] Example 3

[0155] like Figures 24-27As shown, in this embodiment, the connector 20 is slidably connected to the support body 10. Based on Embodiment 2, the tibial support prosthesis 1 further includes a second connecting portion 410 and a second limiting portion 420. The second connecting portion 410 is connected to the guide member 310 and extends in a direction away from the arc-shaped portion 100. The second limiting portion 420 is disposed at the extending edge of the second connecting portion 410 towards the support body 10. The support body 10 is provided with a second limiting groove 134, and the second limiting portion 420 is engaged within the second limiting groove 134. The trajectory of the second limiting groove 134 is adapted to the centerline of the arc-shaped portion 100. The second limiting portion 420 can limit the maximum sliding distance of the arc-shaped portion 100 relative to the support body 10, preventing the arc-shaped portion 100 from moving excessively and increasing the connection strength between the arc-shaped portion 100 and the support body 10. The second connecting part 410 serves as a connecting component between the second limiting part 420 and the arc-shaped part 100. It also plays a guiding role, increasing the contact range between the arc-shaped part 100 and the support body 10, as well as increasing the contact area between the arc-shaped part 100 and the cancellous bone, thereby improving the connection performance between the arc-shaped part 100 and the support body 10 and the cancellous bone.

[0156] like Figure 24 As shown, the second connecting part 410 is connected to the first guide surface 311 of the guide member 310, as... Figure 25 As shown, the connector 20 spans and passes through the support body 10. The arc-shaped portion 100 can be connected to the support body 10 via the limiting boss 120 and the snap-fit ​​portion 130. The second limiting portion 420 can add connection points with the support body 10 at multiple positions of the second connecting portion 410. The second connecting portion 410 is connected to the arc-shaped portion 100 and the guide 310, thereby improving the overall connection performance between the connector 20 and the support body 10, and improving the stability of the connection between the prosthesis and the tibia. Figure 25 As shown, the support body 10 is provided with a third through groove 133, which has a structure similar to the second through groove 132. Additionally, it also has a second limiting groove 134. Figure 27 As shown, the movement trajectory of the second limiting part 420 and the trajectory of the second limiting groove 134 are both arc-shaped with the center line of the arc-shaped part 100, and the centers of the three coincide. When the arc-shaped part 100 moves and inserts into the tibia, the second limiting part 420 can also be smoothly engaged in the second limiting groove 134.

[0157] like Figure 24 As shown, the second connecting part 410 is a rib 221, and the second limiting part 420 is cylindrical. The plane where the second connecting part 410 is located is perpendicular to the axis of the second limiting part 420. This structure is simple, and the rib 221 can further increase the strength of the overall structure. The cylindrical shape and the rib 221 can form a snap-fit ​​structure, snapping into the second limiting groove 134 of the support body 10.

[0158] like Figure 24 and Figure 25 As shown, the connector 20 has a roughly symmetrical structure. The second connecting part 410 is located at the position of the plane of symmetry, and the cylindrical second limiting part 420 extends to both sides along the plane of symmetry, thereby balancing the connection force between the connector 20 and the support body 10.

[0159] In practical implementation, the number of second limiting parts 420 is at least one. For example... Figure 24 and Figure 27 As shown, when there are multiple second limiting portions 420, the multiple second limiting portions 420 are arranged at intervals along the extended edge of the second connecting portion 410. The multiple second limiting portions 420 arranged at intervals can connect with the support body 10 at multiple positions of the connector 20, thereby improving the overall structural strength after the connector 20 and the support body 10 are connected, making the overall structure more stable.

[0160] When there is one second limiting part 420, the second limiting part 420 is preferably positioned so that it and the arc-shaped part 100 are respectively disposed at both ends of the connector 20, thereby enabling connection between the connector 20 and the support body 10 at both ends. Figure 27 As shown, when there are multiple second limiting portions 420, one of them and the arc-shaped portion 100 are respectively disposed at both ends of the connector 20, and the second limiting portion 420 is disposed between the arc-shaped portion 100 and the opposite end. Furthermore, the second limiting portion 420 located at the end can also coincide with the center of the arc-shaped portion 100.

[0161] like Figure 26 As shown, when the arc-shaped portion 100 moves to the proximal bone side 11 of the support body 10, the second connecting portion 410 has a recess 222 facing the edge of the support body 10, and the second limiting portion 420 is disposed within the recess 222. This creates a clearance space to avoid interference with the femoral condyle.

[0162] In a specific implementation, the surface of the arc-shaped portion 100 away from the rotating portion 210 and the surface facing the rotating portion 210 may both be provided with a porous structure 30. Porous structures 30 may also be provided on both sides of the second connecting portion 410. The surface of the support body 10 near the bone 11 is provided with this porous structure 30.

[0163] Example 4

[0164] This embodiment provides another tibial support prosthesis 1. In this embodiment, multiple connectors 20 are arranged at intervals on the support body 10. For surgeries with large implantation spaces, such as total knee arthroplasty with a tibial support prosthesis 1, the multiple connectors 20 can further improve the stability of the connection between the prosthesis and the bone. In this embodiment, the connectors 20 and the support body 10 can adopt any of the structural forms described in Embodiments 1, 2, and 3 above. Alternatively, some connectors 20 can adopt one of the structural forms described in Embodiments 1, 2, and 3 above, while other connectors 20 can adopt other structural forms described in Embodiments 1, 2, and 3 above.

[0165] like Figure 28 and Figure 29 As shown, the tibial prosthesis 1 employs the structural form of the connector 20 and the prosthesis body 10 in Embodiment 1 above. This tibial prosthesis 1 has two connectors 20 arranged side-by-side, with the arcuate portions 100 of both connectors 20 located at the same end of the prosthesis body 10. In other embodiments, the arcuate portions 100 of the two connectors 20 may also be located at opposite ends of the prosthesis body 10, resulting in a more compact structure.

[0166] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A tibial tray prosthesis, characterized by, The tibial tray prosthesis comprises a tray body and a connecting member, The tray body has a proximal bone side with a connected end surface facing the tibia and a distal bone side with a connected end surface facing away from the tibia, and the connecting member is arranged in the tray body along the direction from the distal bone side to the proximal bone side; The connecting member has an arc-shaped portion, and the center line of the longitudinal section of the arc-shaped portion is arc-shaped; the arc-shaped portion is used to move from the distal bone side to the proximal bone side of the tray body so that the arc-shaped portion is inserted into the tibia.

2. The tibial tray prosthesis of claim 1, wherein, The connecting member is rotationally connected with the tray body, and the arc-shaped portion rotates around the rotationally connected part of the connecting member and the tray body from the distal bone side to the proximal bone side of the tray body.

3. The tibial tray prosthesis of claim 2, wherein, The connecting member further comprises a rotating portion and a first connecting portion, the rotating portion is rotationally connected in the tray body, and the first connecting portion extends between the rotating portion and the arc-shaped portion, and the two ends of the first connecting portion are connected with the rotating portion and the arc-shaped portion respectively.

4. The tibial tray prosthesis of claim 3, wherein, The first connecting portion is a fan-shaped rib plate, one end of the rib plate is connected with the rotating portion, and the other end is connected with the arc-shaped portion along the outer contour of the arc-shaped portion; Or, the first connecting portion is a connecting rod, the connecting rod has a plurality of connecting rods, one end of each of the plurality of connecting rods is connected with the rotating portion, and the other end is connected with the arc-shaped portion along the outer contour of the arc-shaped portion.

5. The tibial tray prosthesis of claim 4, wherein, When the arc-shaped portion moves to the proximal bone side of the tray body, the rib plate has a recess towards the edge of the tray body when the first connecting portion is a rib plate; Or, when the arc-shaped portion moves to the proximal bone side of the tray body, the connecting rod close to the tray body among the plurality of connecting rods has a preset distance with the tray body.

6. The tibial tray prosthesis of claim 1, wherein, The connecting member is slidingly connected with the tray body, and the arc-shaped portion slides along the sliding path of the connecting member and the tray body from the distal bone side to the proximal bone side of the tray body.

7. The tibial tray prosthesis of claim 6, wherein, The tibial tray prosthesis further comprises a guide and a guide groove, one of the arc-shaped portion and the tray body is connected with the guide, and the other is provided with the guide groove, and the guide and the guide groove are slidingly matched.

8. The tibial tray prosthesis of claim 7, wherein, The guide is connected with the arc-shaped portion, the guide groove is arranged in the tray body along the direction from the distal bone side to the proximal bone side, and the extension direction of the guide and the guide track of the guide groove are adapted to the center line of the arc-shaped portion.

9. The tibial tray prosthesis of any of claims 1-8, wherein, The center line of the longitudinal section of the arc-shaped portion is a circular arc shape; Or, the center line of the longitudinal section of the arc-shaped portion is a convex curve with a preset curvature.

10. The tibial tray prosthesis according to any one of claims 1-8, wherein, Along the direction from the distal bone side to the proximal bone side, the transverse dimension of the arc-shaped portion gradually decreases, and the thickness of the arc-shaped portion gradually decreases; And / or, the surface and the side edge of the arc-shaped portion are provided with serrations, and the tooth tips of the serrations face the direction of the tibia.

11. The tibial tray prosthesis according to any one of claims 1-8, wherein, The side of the arc-shaped part away from the end of the tibia is provided with a limiting boss, and the surface of the holder body on the far bone side is provided with a first limiting groove for limiting the movement of the limiting boss to the direction of the tibia. And / or, the end of the arc-shaped part away from the tibia is provided with a clamping part, and the surface of the holder body on the near bone side is provided with a clamping groove, and the clamping part is clamped in the clamping groove.

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