Acetabular cup and acetabular system

Abstract

The present application relates to a kind of acetabular cup and acetabular cup system.Acetabular cup includes: cup body;Multiple installation holes are set on cup body, and the installation hole is provided with plug;Plug includes body and at least two connecting components, and at least two connecting components are arranged around the center of body;Each connecting component includes at least one first connector, and each first connector includes oppositely arranged first end and second end, and first end is connected to the circumferential outer surface of body, and second end is connected to the hole wall of installation hole;Wherein, the direction that first connector points from first end to second end is arranged with the axis direction of installation hole in acute angle.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to the acetabular cup and acetabular system. Background Technology

[0002] The acetabular cup is one of the most widely used prostheses in hip replacement surgery. Loosening of the acetabular cup after implantation can lead to serious consequences. To ensure the stability of the implanted acetabular cup, screws are used to fix it in place. For this purpose, multiple screw holes are pre-drilled on the acetabular cup wall. Surgeons can select some of these holes as locations for screw implantation based on the patient's condition. For the screw holes where screws are not implanted, plugs are typically used to seal them. Existing plugs are generally made using two methods: machining and 3D printing. Machining plugs requires precision threads or other precision interference fit structures, making the process complex. Existing 3D-printed plugs have weaker connection strength between the plug and the acetabular cup body. During installation or after implantation, the plug is prone to detachment, resulting in poor safety of existing acetabular cups. Summary of the Invention

[0003] Therefore, it is necessary to provide a safer acetabular cup and acetabular system to address the problem that the plug of the acetabular cup in the prior art is prone to falling off, resulting in poor safety.

[0004] The first aspect of this application provides a hip acetabular cup, comprising:

[0005] Cup body;

[0006] The cup body has multiple mounting holes that penetrate the cup body, and the mounting holes are equipped with plugs.

[0007] The plugging device includes a body and at least two connecting members, the at least two connecting members being arranged around the center of the body;

[0008] Each connecting member includes at least one first connector, and each first connector includes a first end and a second end disposed opposite to each other. The first end is connected to the outer surface of the body along the circumferential direction, and the second end is connected to the wall of the mounting hole.

[0009] The direction of the first connector from the first end to the second end is set at an acute angle to the axial direction of the mounting hole.

[0010] In one embodiment, the width of the first end of the first connector is greater than the width of the second end along the radial direction of the mounting hole.

[0011] In one embodiment, the width of the first connector gradually decreases along the radial direction of the mounting hole from the first end to the second end.

[0012] In one embodiment, the connecting member further includes at least one second connector, each second connector including a third end and a fourth end disposed opposite to each other, the third end being connected to the outer surface of the body along the circumferential direction, and the fourth end being connected to the wall of the mounting hole;

[0013] The direction of the second connector from the third end to the fourth end is perpendicular to the axis of the mounting hole;

[0014] The second connector and the first connector are arranged at intervals along the axial direction of the mounting hole.

[0015] In one embodiment, a groove is provided on the wall of the mounting hole to accommodate the second end of the first connector and the fourth end of the second connector.

[0016] In one embodiment, at least one of the two end faces of the first connector and the second connector along the axial direction of the mounting hole is configured as an arc surface.

[0017] In one embodiment, the second end of the first connector is provided with a first neck, and the second end is connected to the wall of the mounting hole through the first neck; the fourth end of the second connector is provided with a second neck, and the fourth end is connected to the wall of the mounting hole through the second neck; both the first neck and the second neck are accommodated in the groove.

[0018] In one embodiment, of the two end faces of the first connector along the axial direction of the mounting hole, the end face facing the concave surface of the cup body is configured as a convex surface; and / or

[0019] Of the two end faces of the first connector along the axial direction of the mounting hole, the end face facing the convex surface of the cup body is constructed to be concave.

[0020] In one embodiment, the cup body includes a substrate and a porous layer that are stacked on top of each other in the axial direction of the mounting hole;

[0021] The porous layer is arranged facing the convex surface of the cup.

[0022] In one embodiment, the porosity of the porous layer is 20% to 80%; and / or

[0023] There is an annular gap between the porous layer and the wall of the mounting hole.

[0024] A second aspect of this application provides a hip acetabular system, including the aforementioned hip acetabular cup.

[0025] The beneficial effects of the aforementioned acetabular cup and acetabular system:

[0026] In the acetabular cup and acetabular cup system of this application, by connecting the first end of the first connector of the plug to the outer surface of the body along the circumferential direction and the second end to the wall of the mounting hole, the body of the plug can be placed in the mounting hole through the first connector. Since the direction of the first connector from the first end to the second end is set at an acute angle to the axial direction of the mounting hole, when the acetabular cup is subjected to external compressive force, the compressive force is easily decomposed into a force along the axial direction of the mounting hole and a force along the radial direction of the mounting hole. Compared with the scheme where the first end and the second end are set in opposite positions, the force in the radial direction of the mounting hole is smaller, which increases the compressive resistance of the acetabular cup, enhances the strength of the connecting member, and thus reduces the probability of the plug falling off, thereby enhancing the safety of the acetabular cup. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an acetabular cup provided in one embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the mounting structure at the mounting hole in the acetabular cup according to an embodiment of this application;

[0029] Figure 3 for Figure 2 A cross-sectional view along line BB;

[0030] Figure 4 for Figure 2 A magnified view of a portion at point A;

[0031] Figure 5a A schematic diagram of another structure of the plug in the acetabular cup provided in one embodiment of this application;

[0032] Figure 5b for Figure 5a A cross-sectional view along the CC line;

[0033] Figure 6 A schematic diagram of another structure of the plug in the acetabular cup provided in an embodiment of this application;

[0034] Figure 7a A schematic diagram of another structure of the plug in the acetabular cup provided in an embodiment of this application;

[0035] Figure 7b for Figure 7a A cross-sectional view along line DD;

[0036] Figure 8a A schematic diagram of another structure of the plug in the acetabular cup provided in an embodiment of this application;

[0037] Figure 8b for Figure 8a A cross-sectional view along the EE line;

[0038] Figure 9 A schematic diagram of another structure of the plug in the acetabular cup provided in an embodiment of this application;

[0039] Figure 10 This is a schematic diagram of another structure of the plug in the acetabular cup provided in one embodiment of this application.

[0040] Explanation of icon numbers:

[0041] 100. Acromial cup; 10. Cup body; 101. Substrate; 102. Porous layer; 11. Mounting hole; 12. Convex surface; 13. Concave surface; 20, 201, 203, 205, 207, 209. Plug; 21. Body; 30, 202, 204, 206, 208, 210. Connecting member; 31, 211, 212. First connecting member; 311. First end; 312. Second end; 313. First neck; 314. First end face; 315. Second end face; 316. Third end face; 317. Fourth end face; 32. Second connecting member; 321. Third end; 322. Fourth end; 323. Spacing; 324. Annular spacing; 325. Connecting hole; 50. Groove. Detailed Implementation

[0042] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0048] The acetabular cup and acetabular system of this application are described below with reference to the accompanying drawings.

[0049] Figure 1 This is a schematic diagram of the structure of an acetabular cup provided in one embodiment of this application. Figure 2 This is a schematic diagram of the mounting structure at the mounting hole in the acetabular cup according to an embodiment of this application. Figure 3 for Figure 2 A cross-sectional view along line BB. Figure 4 for Figure 2 A magnified view of a portion at point A.

[0050] Reference Figure 1 , Figure 2 This application provides an acetabular cup 100, which is applied to the acetabular system to repair the hip joint. As understood, the hip joint connects the femur to the hip bone of the pelvis and plays a crucial role in sitting and standing. Hip prostheses are currently the most effective treatment for hip joint diseases, allowing patients to restore joint function and alleviate pain to some extent. The acetabular cup 100 is an important component of the acetabular system.

[0051] In existing acetabular systems, screws are used to fix the acetabular cup prosthesis in place to ensure stability after implantation. Multiple screw holes are pre-drilled in the acetabular cup wall, allowing the surgeon to select the screw placement based on the patient's condition. For screw holes not intended for screw implantation, plugs are typically used to seal them. Specifically, existing plugs typically include a body and a connecting rod, with both ends of the connecting rod connected to the body and the wall of the screw hole, respectively, thus placing the plug within the hole. However, during installation or after implantation, if the connecting rod's connection strength is weak, the plug can easily detach, compromising the safety of the existing acetabular cup. Conversely, if the connecting rod is too strong, it becomes difficult for the surgeon to remove the plug when screw implantation is needed.

[0052] In view of this, this application provides an acetabular cup 100, referring to... Figure 1 , Figure 2 , Figure 3 The acetabular cup 100 includes a cup body 10. The cup body 10 may have a plurality of mounting holes 11 extending through the cup body 10, and a plug 20 is provided in the mounting hole 11; the plug 20 includes a body 21 and at least two connecting members 30, and the at least two connecting members 30 are arranged around the center of the body 21.

[0053] Each connecting member 30 includes at least one first connecting member 31. Each first connecting member 31 includes a first end 311 and a second end 312 disposed opposite to each other. The first end 311 is connected to the outer surface of the body 21 along the circumferential direction, and the second end 312 is connected to the wall of the mounting hole 11. The direction Z of the first connecting member 31 from the first end 311 to the second end 312 is set at an acute angle to the axial direction O of the mounting hole 11. In other words, the first end 311 and the second end 312 of the first connecting member 31 are staggered in the axial direction O of the mounting hole.

[0054] In the above scheme, by connecting the first end 311 of the first connector 31 to the outer surface of the body 21 along the circumferential direction and the second end 312 to the wall of the mounting hole 11, the body 21 can be placed in the mounting hole 11 through the first connector 31. Since the direction Z of the first connector 31 from the first end 311 to the second end 312 is set at an acute angle to the axial direction of the mounting hole 11, when the acetabular cup 100 is subjected to external extrusion force, the extrusion force is easily decomposed into a force along the axial direction O of the mounting hole 11 and a force along the radial direction of the mounting hole 11. Compared with the scheme where the first end 311 and the second end 312 are set in opposite positions, the force in the radial direction of the mounting hole 11 is smaller. This increases the extrusion resistance of the acetabular cup 100 and enhances the strength of the connecting member. Therefore, it reduces the probability of the plug 20 falling off and enhances the safety of the acetabular cup 100.

[0055] The cup body 10 is the main part of the acetabular cup 100, and it can be roughly constructed in a hemispherical shape, such as... Figure 1 and Figure 3 As shown, the hemispherical cup body 10 may include a convex surface 12 and a concave surface 13. The concave surface 13 is the surface of the cup body 10 facing the femur of the user, and the convex surface 12 is the surface facing away from the femur. Additionally, it can be understood that the outer contour shape of the cup body 10 can be as follows: Figure 1 The cup is hemispherical as shown, but other shapes can be selected according to actual needs. In addition, the acetabular cup 100 of this embodiment adopts a 3D printed integrated structure, that is, the cup body 10 and the plug 20 can be integrally formed by 3D printing technology, which reduces the cost of processing the plug 20 separately.

[0056] Continue to refer to Figure 1 As mentioned above, multiple mounting holes 11 can be provided on the cup body 10, and a plug 20 is provided in the mounting hole 11.

[0057] As mentioned earlier, to ensure the stability of the acetabular cup 100 implanted in the human body, screws can be used to fix the acetabular cup 100 prosthesis. For this purpose, multiple mounting holes 11 are pre-set on the wall of the acetabular cup 100. Doctors can choose the position of the screws according to the patient's condition. For mounting holes 11 where screws are not inserted, plugs 20 can generally be placed in the mounting holes 11 to block them.

[0058] In specific implementation, each mounting hole 11 may be provided with a plug 20, or only some mounting holes 11 may be provided with a plug 20. In this embodiment, the example of providing a plug 20 in some mounting holes 11 will be used for illustration.

[0059] In this embodiment, the plug 20 includes a body 21 and at least two connecting members 30, which are arranged around the center of the body 21. The number of connecting members 30 is at least two, but can be multiple depending on actual needs. In this embodiment, we will illustrate with an example of three connecting members 30 evenly distributed around the axial direction O of the mounting hole. Of course, the same applies to other numbers and arrangements of connecting members 30, which will not be elaborated here. It is understood that when the connecting members 30 are evenly distributed around the axial direction O of the mounting hole, the external force on each connecting member 30 can be relatively uniform when the plug 20 is removed using a tool, facilitating the simultaneous breakage of each connecting member 30.

[0060] In addition, continue to refer to Figure 3 Each connecting member 30 includes at least one first connecting member 31. This embodiment is described with the example that each connecting member 30 includes one first connecting member 31. The same applies to other cases where the number of first connecting members 31 included in each connecting member 30 is different, and will not be described again here.

[0061] Each first connector 31 includes a first end 311 and a second end 312 disposed opposite to each other. The first end 311 is connected to the outer surface of the body 21 along the circumferential direction, and the second end 312 is connected to the wall of the mounting hole 11.

[0062] Here, the direction Z of the first connector 31 from the first end 311 to the second end 312 is set at an acute angle to the axial direction O of the mounting hole. Specifically, the angle α between the direction Z of the first connector 31 from the first end 311 to the second end 312 and the axial direction O of the mounting hole is an acute angle. At this time, the first end 311 and the second end 312 are not directly opposite each other in the axial direction, but are offset from each other. Thus, when the acetabular cup 100 is implanted into the pre-placed acetabular socket, the plug 20 is subjected to a compressive force from the convex surface 12 towards the concave surface 13. This specifically inclined first connector 31 provides high resistance to compression, ensuring that the plug 20 will not fall off during the implantation of the acetabular cup 100 into the human body. It is understood that the first connector 31 can be configured as a rod-shaped member.

[0063] Specifically, the direction Z of the first connector 31 from the first end 311 to the second end 312 can, for example, refer to the direction from the approximate center position of the first end 311 to the approximate center position of the second end 312. Figure 3 In the middle, the second end 312 is closer to the concave surface 13 than the first end 311.

[0064] In the embodiments of this application, reference is made to Figure 2Along the radial direction R of the mounting hole 11, the width of the first end 311 of the first connector 31 is greater than the width of the second end 312. Here, the width of the first end 311 of the first connector 31 refers to the dimension h1 of the first end 311 in the tangential direction, and the width of the second end 312 of the first connector 31 refers to the dimension h2 of the second end 312 in the tangential direction. Figure 2 As shown, h1 > h2.

[0065] As described above, by making the width of the first end 311 of the first connector 31 greater than the width of the second end 312, the fracture point of the first connector 31 is more likely to be concentrated at the second end 312. Specifically, when the operator applies a rotational force to the body 21 around the axis O of the mounting hole, since the first end 311 of the first connector 31 is thicker than the second end 312, the connection strength between the first connector 31 and the body 21 is increased, while the connection strength between the first connector 31 and the wall of the mounting hole 11 is relatively weakened. The fracture point will be concentrated at the weaker second end 312, which can effectively avoid the fracture point being concentrated at the first end 311 and prevent the first connector 31 from being entirely connected to the wall of the mounting hole 11 after fracture.

[0066] Further, continue to refer to Figure 2 , Figure 4 Along the radial direction R of the mounting hole, the width of the first connector 31 gradually decreases in the direction from the first end 311 to the second end 312, so that the first connector 31... Figure 2 From a top-down perspective, the cross-section is roughly trapezoidal. This design increases the compressive strength of the plug 20 while reducing its torsional strength, making it easier for the operator to remove the plug 20 by twisting while increasing its stability during service. For example, the width of the second end 312 can be 150 μm to 300 μm.

[0067] In this embodiment of the application, the connecting member 30 may also include at least one second connecting member 32. The number of second connecting members 32 corresponding to each mounting hole 11 may be the same or different. Here, we take the example that each connecting member 30 includes one second connecting member 32. The same applies to other cases where the number of second connecting members 32 is different, and will not be described in detail here.

[0068] Continue to refer to Figure 3Each second connector 32 includes a third end 321 and a fourth end 322 disposed opposite to each other. The third end 321 is connected to the outer surface of the body 21 along the circumferential direction, and the fourth end 322 is connected to the wall of the mounting hole 11. The direction of the second connector 32 from the third end 321 to the fourth end 322 is perpendicular to the axial direction O of the mounting hole, and the second connector 32 and the first connector 31 are spaced apart in the axial direction O of the mounting hole. In other words, the second connector 32 and the first connector 31 are spaced apart 323 in the axial direction of the mounting hole 11, that is, the connecting member 30 has a hollow mechanism inside. Setting the connecting member 30 as two spaced-apart first connectors 31 and second connectors 32 can further increase the compressive strength of the connecting member 30 and reduce the torsional strength of the plug 20.

[0069] Understandably, in order to facilitate the fracture occurring at the fourth end 322, the width of the third end 321 of the second connector 32 is greater than the width of the fourth end 322 along the radial direction R of the mounting hole 11. The width of the third end 321 of the second connector 32 refers to the dimension of the third end 321 of the second connecting rod in the tangential direction of the third end 321, and the width of the second end 312 of the first connector 31 refers to the dimension of the fourth end 322 of the second connecting rod in the tangential direction of the fourth end 322.

[0070] Furthermore, along the radial direction R of the mounting hole, the width of the second connector 32 gradually decreases in the direction from the third end 321 to the fourth end 322, so that the second connector 32... Figure 2 From a top-down perspective, the cross-section is roughly trapezoidal. This design increases the compressive strength of the plug 20 while reducing its torsional strength, making it easier for the operator to remove the plug 20 by twisting while increasing its stability during service. For example, the width of the fourth end 322 can be 150μm to 300μm.

[0071] As mentioned earlier, when the plug 20 is tightened by the operator, it breaks at the second end 312 of the first connector 31 and the fourth end 322 of the second connector 32. This may leave a protruding structure on the wall of the mounting hole 11, which can prevent the screw from being screwed in smoothly. To avoid this, a groove 50 can be provided on the wall of the mounting hole 11 to accommodate the second end 312 of the first connector 31 and the fourth end 322 of the second connector 32. In this way, even if a residual structure is generated at the second end 312 and the fourth end 322 upon breakage, the residual structure is accommodated in the groove 50 and will not affect the screwing in. The groove 50 extends through the cup body 10 along the axial direction O of the mounting hole, or it can be provided only at the positions corresponding to the second end 312 and the fourth end 322.

[0072] For example, the depth of the groove 50 along the radial direction R of the mounting hole can be 0.5 mm, and the circumferential dimension along the mounting hole 11 can be 2.0 mm.

[0073] Continue to refer to Figure 3 At least one of the two end faces of the first connector 31 and the second connector 32 along the axial direction O of the mounting hole is constructed as an arc surface. This helps to enhance the compressive strength of the first connector 31 and the second connector 32. In a further improvement, the end face 314 of the first connector 31 facing the concave surface 13 of the cup body 10, i.e., the first end face 314, along the axial direction O of the mounting hole, can be constructed as a convex surface. This optimizes the stress on the first connector 31, giving it strong compressive strength but not strong torsional strength.

[0074] In some other examples, of the two end faces of the first connector 31 along the axial direction O of the mounting hole, the end face facing the convex surface 12 of the cup body 10, i.e., the second end face 315, is constructed to be concave. As described above, the first end face 314 of the first connector 31 is convex and the second end face 315 is concave, which allows the first connector 31 to be bent approximately towards the convex surface 12 of the cup body 10. This further optimizes the stress on the first connector 31, giving it strong resistance to compression but not strong resistance to torsion.

[0075] Furthermore, regarding the second connector 32, of its two end faces along the axial direction O of the mounting hole, the end face facing the concave surface 13 of the cup body 10, i.e., the third end face 316, is constructed as a concave surface, while the end face facing the convex surface 12 of the cup body 10, i.e., the fourth end face 317, is constructed as a planar surface. In this way, the third end face 316 of the second connector 32 is convex, and the fourth end face 317 is concave. This structure allows the second connector 32 to be bent approximately towards the concave surface 13 of the cup body 10. Combined with the structure of the first connector 31 being bent approximately towards the convex surface 12 of the cup body 10, this further enhances the first connector 31 and the second connector 32's resistance to compression, while reducing their resistance to torsion.

[0076] Furthermore, refer to Figure 3 , Figure 4The second end 312 of the first connector 31 is further provided with a first neck 313, and the second end 312 is connected to the wall of the mounting hole 11 through the first neck 313; the fourth end 322 of the second connector 32 is provided with a second neck (not shown), and the fourth end 322 is connected to the wall of the mounting hole 11 through the second neck; both the first neck 313 and the second neck can be accommodated in the groove. Because the first connector 31 has a localized reduction in size at the first neck 313, the first neck 313 forms a stress concentration structure, making torsional fracture more likely to occur when the plug 20 is twisted. Similarly, because the second connector 32 has a localized reduction in size at the second neck, the second neck forms a stress concentration structure. Both the second neck and the first neck 313 are located on one side of the wall of the mounting hole 11, making torsional fracture more likely to occur when the plug 20 is twisted.

[0077] For example, the first neck 313 can have a radial dimension of 350 μm along the mounting hole 11, and a tangential dimension of 150 μm to 300 μm. Using these dimensions for the first neck 313 effectively reduces the torsional resistance of the connecting rod and improves the operability of torsion removal.

[0078] In this embodiment, the cup body 10 may further include a substrate 101 and a porous layer 102 stacked on top of each other in the axial direction O of the mounting hole; wherein the porous layer 102 is arranged facing the convex surface 12 of the cup body 10. This can increase the bone ingrowth area and increase the stability of the cup body 10. It should be noted that the surface of the plug 20 facing the convex surface 12 of the cup body 10 may also be provided with a porous layer.

[0079] For example, the porosity of the porous layer 102 can be 20%-80%. Within this range, the contact area between the cup 10 and the bone can be effectively increased, enabling early fixation through the press-fitting of the acetabular cup 100 with the bone, and long-term fixation through bone ingrowth. For example, the thickness of the porous layer 102 can be approximately 0.5 mm. Furthermore, an annular gap 324 exists between the porous layer 102 and the wall of the mounting hole 11. Thus, when the operator rotates the body 21, the wall of the mounting hole 11 will not affect the rotation of the body 21 due to the presence of this annular gap. For example, the gap of this annular gap 324 can be 0.2 mm.

[0080] In the embodiments of this application, reference is made to Figure 2 As shown, the plug 20 may also have an internal hexagonal connection hole 325 on the side facing the concave surface 13. This connection hole 325 is used to connect with an external tool, such as a hex screwdriver. Before the operation, the operator can insert an external screwdriver into the connection hole 325 to twist and remove the plug 20. In addition, the connection hole 325 may also have a chamfer to facilitate screwdriver insertion.

[0081] To verify the safety of the acetabular cup in the embodiments of this application, the inventors conducted research on... Figures 1-4 The acetabular cup shown was subjected to compression and torsion tests. The test results showed that the plug would only fall off the cup body when the compression force was greater than 800N; and when the plug was removed by torsion, the torque was no more than 3N·m to remove the plug from the cup body. This indicates that the acetabular cup of this application embodiment has good compression resistance and the plug can be easily removed by torsion.

[0082] Based on the above solution, the embodiments of this application further improve the connecting member. It should be noted that other structures and Figures 1-4 The structures shown are the same, so they will not be described in detail here.

[0083] Figure 5a This is a schematic diagram illustrating another structure of the plug in the acetabular cup provided in one embodiment of this application. Figure 5b for Figure 5a A sectional view along line CC. Figure 6 This is a schematic diagram of another structure of the plug in the acetabular cup provided in one embodiment of this application. Figure 7a This is a schematic diagram of another structure of the plug in the acetabular cup provided in one embodiment of this application. Figure 7b for Figure 7a A cross-sectional view along line DD. Figure 8a This is a schematic diagram of another structure of the plug in the acetabular cup provided in one embodiment of this application. Figure 8b for Figure 8a A cross-sectional view along line EE. Figure 9 This is a schematic diagram of another structure of the plug in the acetabular cup provided in one embodiment of this application. Figure 10 This is a schematic diagram of another structure of the plug in the acetabular cup provided in one embodiment of this application.

[0084] Reference Figure 5a , Figure 5b As one possible implementation, the connecting member 202 in the plug 201 is integrally formed into a structure, which can further improve the pressure resistance of the plug 201.

[0085] Reference Figure 6 As another possible implementation, the connecting member 204 in the plug 203 has an angle with the radial direction of the mounting hole 11, that is, the connecting member 204 is inclined relative to the radial direction of the mounting hole 11. Here, the first connector and the second connector included in the connecting member 204 may both be inclined relative to the radial direction of the mounting hole 11.

[0086] Reference Figure 7a , Figure 7bAs one possible implementation, the connecting member 206 in the plug 205 includes only one first connector 211, which can further reduce the torsional force of the plug 205.

[0087] Reference Figure 8a , Figure 8b As one possible implementation, the connecting member 208 in the plug 207 includes only three first connecting members 212, which can further improve the compressive strength of the plug 207.

[0088] Reference Figure 9 , Figure 10 As one possible implementation, the number of connecting members 210 in the plug 209 can be two or four.

[0089] This application also provides a hip acetabular system, including the aforementioned hip acetabular cup 100. The structure and working principle of the hip acetabular cup 100 have been described in detail above and will not be repeated here.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A hip cup, characterized in that, include: Cup body; The cup body has multiple mounting holes that penetrate the cup body, and the mounting holes are provided with plugs; The plugging plug includes a body and at least two connecting members, the at least two connecting members being arranged around the center of the body; Each of the connecting members includes at least one first connector, and each first connector includes a first end and a second end disposed opposite to each other. The first end is connected to the outer surface of the body along the circumferential direction, and the second end is connected to the wall of the mounting hole. Wherein, the direction of the first connector from the first end to the second end is set at an acute angle to the axial direction of the mounting hole; the second end is closer to the concave side of the cup body than the first end; when the acetabular cup is subjected to external extrusion force, the extrusion force is decomposed into a force along the axial direction of the mounting hole and a force along the radial direction of the mounting hole; The plug has a connection hole on the side facing the concave surface of the cup body.

2. The acetabular cup according to claim 1, characterized in that, Along the radial direction of the mounting hole, the width of the first end of the first connector is greater than the width of the second end.

3. The acetabular cup according to claim 2, characterized in that, Along the radial direction of the mounting hole, the width of the first connector gradually decreases in the direction from the first end to the second end.

4. The acetabular cup according to any one of claims 1-3, characterized in that, The connecting member further includes at least one second connector, each second connector including a third end and a fourth end disposed opposite to each other, the third end being connected to the outer surface of the body along the circumferential direction, and the fourth end being connected to the wall of the mounting hole; The direction of the second connector from the third end to the fourth end is perpendicular to the axial direction of the mounting hole; The second connector and the first connector are arranged at intervals along the axial direction of the mounting hole.

5. The acetabular cup according to claim 4, characterized in that, The mounting hole has a groove on its wall to accommodate the second end of the first connector and the fourth end of the second connector.

6. The acetabular cup according to claim 5, characterized in that, At least one of the two end faces of the first connector and the second connector along the axial direction of the mounting hole is constructed as an arc surface.

7. The acetabular cup according to claim 6, characterized in that, The second end of the first connector is provided with a first neck, and the second end is connected to the wall of the mounting hole through the first neck; the fourth end of the second connector is provided with a second neck, and the fourth end is connected to the wall of the mounting hole through the second neck; both the first neck and the second neck are accommodated in the groove.

8. The acetabular cup according to claim 6, characterized in that, Of the two end faces of the first connector along the axial direction of the mounting hole, the end face facing the concave surface of the cup body is configured as a convex surface; and / or Of the two end faces of the first connector along the axial direction of the mounting hole, the end face facing the convex surface of the cup body is constructed to be concave.

9. The acetabular cup according to claim 1, characterized in that, The cup body includes a substrate and a porous layer that are stacked on top of each other in the axial direction of the mounting hole; The porous layer is arranged facing the convex surface of the cup body.

10. The acetabular cup according to claim 9, characterized in that, The porosity of the porous layer is 20%~80%; and / or There is an annular gap between the porous layer and the wall of the mounting hole.

11. A hip acetabular system, characterized in that, Includes the acetabular cup as described in any one of claims 1 to 10.

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