Acetabular cup prosthesis

Abstract

The present invention discloses an acetabular cup prosthesis, comprising an acetabular cup and an acetabular liner; the acetabular cup has an outer surface and an inner surface, the outer surface of the acetabular cup is installed in the acetabular socket of a human body; the acetabular liner has an outer surface and an inner surface for installing a femoral ball head, the outer surface of the acetabular liner is installed in the acetabular cup and is adapted to the inner surface of the acetabular cup; a slot is formed on the inner surface of the acetabular cup, a first protrusion is provided on the outer surface of the acetabular liner, the first protrusion is engaged with the slot, so that the acetabular liner is axially fixed relative to the acetabular cup; wherein the outer surface of the acetabular liner is also provided with a second protrusion, the second protrusion is located on the side of the first protrusion close to the acetabular liner port, extends toward the acetabular cup, and abuts against the inner surface of the acetabular cup, so as to block the gap between the acetabular cup and the acetabular liner. The invention aims to solve the problem that the existing acetabular cup and acetabular liner are prone to micro-motion.

Description

Technical Field

[0001] The invention relates to the technical field of medical prostheses, and in particular to an acetabular cup prosthesis. Background Art

[0002] Artificial hip replacement is a relatively mature surgery, which can effectively help patients with severe hip joint damage to improve their lives. The prosthesis that needs to be replaced in hip replacement usually includes the acetabular cup prosthesis and the femoral side prosthesis. The acetabular cup prosthesis includes the acetabular cup and the acetabular liner, and the femoral side prosthesis includes the femoral ball head and the femoral stem. In order to reduce wear and prolong the retention time of the prosthesis in the body, the existing acetabular cup and acetabular liner are usually made of metal materials. Although the acetabular cup and the acetabular liner need to be fixed, they will inevitably produce micro-motion when used in the body, resulting in metal ions produced in long-term friction that may be harmful to the human body and endanger human health, and are particularly harmful to people with poor kidney function or during pregnancy. On the other hand, the micro-motion caused by the fixed cooperation between the acetabular cup and the acetabular liner will cause wear during long-term use, affecting the service life of the prosthesis. Summary of the invention

[0003] The object of the present invention is to provide an acetabular cup prosthesis to solve the problem that the existing acetabular cup and acetabular liner are prone to micro-motion.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] An acetabular cup prosthesis comprises an acetabular cup and an acetabular liner;

[0006] The acetabular cup has an outer surface and an inner surface, and the outer surface of the acetabular cup is installed in the acetabulum of a human body;

[0007] The acetabular liner has an outer surface and an inner surface for mounting a femoral ball head, and the outer surface of the acetabular liner is mounted on the acetabular cup and matched with the inner surface of the acetabular cup;

[0008] The inner surface of the acetabular cup is formed with a slot, and the outer surface of the acetabular liner is provided with a first protrusion, and the first protrusion is engaged with the slot to fix the acetabular liner axially relative to the acetabular cup;

[0009] A second protrusion is also provided on the outer surface of the acetabular liner. The second protrusion is located on the side of the first protrusion close to the acetabular liner port, extends toward the acetabular cup, and abuts against the inner surface of the acetabular cup to seal the gap between the acetabular cup and the acetabular liner.

[0010] In one embodiment, a plug-in groove is formed at the connection between the inner surface of the acetabular cup and the end surface of the acetabular cup, and a third protrusion is provided on the outer surface of the acetabular liner. The third protrusion is plugged into and matched with the plug-in groove to radially fix the acetabular liner relative to the acetabular cup.

[0011] In one embodiment, the third protruding member has a first guide surface and a second guide surface, and the first guide surface and the second guide surface are used for guiding the third protruding member when it is installed in the plug-in slot.

[0012] In one embodiment, the inner surface of the acetabular cup includes a conical surface and a dome surface, the dome surface is connected to the conical surface, the conical surface is close to the acetabular cup port, and the acetabular cup, the inner spherical surface and the conical surface are coaxial.

[0013] In one embodiment, the inner surface of the acetabular cup further includes a plane, and the plane is located at the top of the acetabular cup, and the conical surface, the dome surface and the plane are connected in sequence.

[0014] In one embodiment, the acetabular cup has a mounting hole; the mounting hole is a countersunk hole.

[0015] In one embodiment, the acetabular cup is made of polyetheretherketone or a polyetheretherketone composite material;

[0016] The acetabular cup prosthesis includes a first coating applied to an outer surface of the acetabular cup.

[0017] In one embodiment, the acetabular cup prosthesis includes a first coating and a second coating stacked with the first coating, wherein the first coating is close to and disposed on the outer surface of the acetabular cup; wherein the material of the first coating is a metal material, and the material of the second coating is hydroxyapatite.

[0018] In one embodiment, the material of the first coating is a metal composition, and the metal composition is a mixture of metal and hydroxyapatite; the composition ratio of the metal and hydroxyapatite in the first coating is gradually changed from a metal component greater than a hydroxyapatite to a metal component less than a hydroxyapatite along the normal direction away from the outer surface of the acetabular cup, so as to form a first coating with a metal gradient layer;

[0019] Wherein, the metal is selected from the following materials: pure titanium, titanium alloy, and tantalum metal.

[0020] In one embodiment, the second coating is annular and is coated on a side close to the acetabular cup port.

[0021] In one embodiment, the acetabular cup prosthesis further includes a third coating, which is stacked on the second coating, and the material of the third coating is a composition containing silver ions or copper ions or antibiotics.

[0022] In one embodiment, the acetabular cup prosthesis further includes a fourth coating, which is stacked on the second coating, and the fourth coating contains bioactive substances such as growth factors and cell adhesion molecules.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] It is understandable that the technical solution of the present invention forms a slot on the inner surface of the acetabular cup, and a first protrusion is provided on the outer surface of the acetabular liner. The first protrusion is engaged with the slot to fix the acetabular liner axially relative to the acetabular cup. However, this fixing method will inevitably lead to a gap between the inner surface of the acetabular cup and the outer surface of the acetabular liner. The technical solution also provides a second protrusion on the outer surface of the acetabular liner. The second protrusion is located on the side of the first protrusion close to the port of the acetabular liner, extends toward the acetabular cup, and abuts against the inner surface of the acetabular cup to block the gap between the acetabular cup and the acetabular liner. The gap between the inner surface of the acetabular cup and the outer surface of the acetabular liner is reduced. When a large amount of body fluid does not enter the above-mentioned gap, the micro-motion between the acetabular cup and the acetabular liner is also slowed down; on the other hand, the second protrusion in the present solution extends toward the acetabular cup, which greatly reduces the range of motion of the acetabular liner relative to the inner surface of the acetabular cup, thereby solving the problem of micro-motion between the existing acetabular cup and the acetabular liner from two aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of an embodiment of the present invention;

[0029] Figure 3 for Figure 2 A magnified view of part A in FIG.

[0030] Figure 4 for Figure 2 A magnified view of part B in FIG.

[0031] Figure 5 It is a structural schematic diagram of an embodiment of an acetabular liner of the present invention;

[0032] Figure 6 for Figure 5 The enlarged view of the D part in FIG.

[0033] Figure 7 A cross-sectional view of another embodiment of the present invention

[0034] Figure 8 A cross-sectional view of an embodiment of the first coating of the present invention;

[0035] Fig. 9 A cross-sectional view of another embodiment of the present invention;

[0036] Fig.10 This is a cross-sectional view of another embodiment of the present invention.

[0037] Illustrations: 100, acetabular cup prosthesis; 120, acetabular cup; 121, slot; 122, plug-in slot; 123, conical surface; 124, dome surface; 125, plane; 126, mounting hole; 130, acetabular liner; 131, first protrusion; 132, second protrusion; 133, third protrusion; 1331, first guide surface; 1332, second guide surface; 140, first coating; 142, second coating. DETAILED DESCRIPTION

[0038] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0040] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0041] An embodiment of the present invention provides an acetabular cup prosthesis 100 .

[0042] See also Figure 1 , Figure 3 and Figure 5 In one embodiment, the acetabular cup prosthesis 100 includes an acetabular cup 120 and an acetabular liner 130;

[0043] The acetabular cup 120 has an outer surface and an inner surface, and the outer surface of the acetabular cup 120 is installed in the acetabulum of a human body;

[0044] The acetabular liner 130 has an outer surface and an inner surface for mounting the femoral ball head. The outer surface of the acetabular liner 130 is mounted on the acetabular cup 120 and is matched with the inner surface of the acetabular cup 120.

[0045] The inner surface of the acetabular cup 120 is formed with a slot 121, and the outer surface of the acetabular liner 130 is provided with a first protrusion 131, and the first protrusion 131 is engaged with the slot 121 to fix the acetabular liner 130 axially relative to the acetabular cup 120;

[0046] The outer surface of the acetabular liner 130 is further provided with a second protrusion 132, which is located on the side of the first protrusion 131 close to the port of the acetabular liner 130, extends toward the acetabular cup 120, and abuts against the inner surface of the acetabular cup 120, so as to block the gap between the acetabular cup 120 and the acetabular liner 130.

[0047] It can be understood that the technical solution of the present invention forms a slot 121 on the inner surface of the acetabular cup 120, and the outer surface of the acetabular liner 130 is provided with a first protrusion 131, and the first protrusion 131 is engaged with the slot 121, so that the acetabular liner 130 is axially fixed relative to the acetabular cup 120, but this fixing method will inevitably cause a gap between the inner surface of the acetabular cup 120 and the outer surface of the acetabular liner 130. The technical solution also provides a second protrusion 132 on the outer surface of the acetabular liner 130, and the second protrusion 132 is located on the side of the first protrusion 131 close to the port of the acetabular liner 130, and extends toward the acetabular cup 120, so as to block the gap between the acetabular cup 120 and the acetabular liner 130. The gap between the inner surface of the acetabular cup 120 and the outer surface of the acetabular liner 130 is reduced. When a large amount of body fluid does not enter the above-mentioned gap, the micro-motion between the acetabular cup 120 and the acetabular liner 130 is also slowed down; on the other hand, the second protrusion 132 in the present solution extends toward the acetabular cup 120, which greatly reduces the range of motion of the acetabular liner 130 relative to the inner surface of the acetabular cup 120, thereby solving the problem of micro-motion between the existing acetabular cup 120 and the acetabular liner 130 from two aspects.

[0048] In one embodiment, the second protrusion 132 is annular and flush with the end surface of the acetabulum liner 130 .

[0049] It should be noted that when the operator installs the acetabular liner 130, the operator needs to use a tool to knock on the end face of the acetabular liner 130 so that the first protrusion 131 can be snapped into the slot 121. The second protrusion 132 is arranged flush with the end face of the acetabular liner 130, which can also expand the force-bearing area of ​​the end face and prevent the end face of the acetabular liner 130 from being damaged.

[0050] See also Figure 3 Optionally, the height of the second protrusion 132 is greater than the height of the end face of the acetabular cup 120. It is understandable that when the acetabular liner 130 is installed by tapping, in order to prevent the end face of the acetabular cup 120 from being damaged during tapping, the height of the second protrusion 132 is set to be greater than the height of the end face of the acetabular cup 120.

[0051] See also Figure 3 and Figure 5In a specific embodiment, a plug-in groove 122 is further formed at the connection between the inner surface of the acetabular cup 120 and the end surface of the acetabular cup 120, and a third protrusion 133 is provided on the outer surface of the acetabular liner 130. The third protrusion 133 is plugged and matched with the plug-in groove 122, so that the acetabular liner 130 is radially fixed relative to the acetabular cup 120. It can be understood that the plug-in groove 122 cooperates with the third protrusion 133 to avoid the axial rotation of the acetabular liner 130 relative to the acetabular cup 120, so that the acetabular liner 130 is radially fixed relative to the acetabular cup 120, the wear of the acetabular cup prosthesis 100 is slowed down, and the service life of the acetabular cup prosthesis 100 is extended.

[0052] Optionally, in order to improve the fixing effect, the third protrusions 133 are multiple in number and are arranged in a ring array relative to the outer surface of the acetabulum liner 130 .

[0053] See also Figure 5 and Figure 6 On the basis of the above embodiment, in order to facilitate installation, the third protrusion 133 has a first guide surface 1331 and a second guide surface 1332, and the first guide surface 1331 and the second guide surface 1332 are used for guiding the third protrusion 133 when it is installed in the plug-in slot 122.

[0054] Furthermore, if Figure 2 As shown, the first guide surface 1331 and the second guide surface 1332 are symmetrically arranged. The arrangement of the first guide surface 1331 and the second guide surface 1332 expands the contact area with the side surface of the insertion slot 122 and reduces the wear of the third protrusion 133.

[0055] See also Figure 2 In a preferred embodiment, the inner surface of the acetabular cup 120 includes a conical surface 123 and a dome surface 124 , the dome surface 124 is connected to the conical surface 123 , and the conical surface 123 is close to the port of the acetabular cup 120 .

[0056] It can be understood that the inner surface of the acetabular cup 120 formed by the dome surface 124 and the tapered surface 123 is adapted to the outer surface of the acetabular liner 130, and the inner surface of the acetabular cup 120 formed by the dome surface 124 and the tapered surface 123 can prevent the acetabular liner 130 from being offset relative to the axial direction. The setting of the tapered surface 123 can accurately install the acetabular liner 130 and prevent the acetabular liner 130 from being offset relative to the axial direction.

[0057] Optionally, the structure of the conical surface 123 conforms to the Morse cone structure, and correspondingly, the cone angle of the conical surface 123 is α, wherein 5°≤α≤30°, and the specific value of α can be 5°, 10°, 15°, 20°, 25°, or 30°.

[0058] See also Figure 2 and Figure 4 On the basis of the above embodiment, the inner surface of the acetabular cup 120 further includes a plane 125, and the plane 125 is located at the top of the acetabular cup 120, and the conical surface 123, the dome surface 124 and the plane 125 are connected in sequence.

[0059] It can be understood that when the top of the inner surface of the acetabular cup 120 is a flat surface 125 , the acetabular liner 130 can be further prevented from being offset relative to the axial direction.

[0060] On the other hand, when the top of the inner surface of the acetabular cup 120 is a plane 125 , the thickness of the top of the acetabular cup 120 can be increased.

[0061] Please continue reading Figure 4 In another specific embodiment, the acetabular cup 120 has a mounting hole 126, and the mounting hole 126 is a countersunk hole. The mounting hole 126 is used to install screws, so that the acetabular cup prosthesis 100 is connected to the human skeleton through the screws.

[0062] Optionally, the acetabular cup 120 has a mounting hole 126, and the mounting hole 126 is located on the plane 125. It is understood that the thickness of the top of the acetabular cup 120 at the plane 125 is thicker and has a higher nail holding ability. It is also understood that the mounting hole 126 is used to disassemble the acetabular cup prosthesis 100 implanted in the acetabular socket of the human body.

[0063] Optionally, see Figure 2 In one embodiment, the number of the mounting holes 126 is multiple, and the multiple mounting holes 126 can reinforce the connection between the acetabular cup 120 and the human skeleton through screws. It is understandable that for some patients with poor bone quality or bone diseases, screws need to be used to reinforce the connection between the acetabular cup 120 and the human skeleton.

[0064] Optionally, the mounting hole 126 is a countersunk hole, and the type of the countersunk hole can be a conical countersunk hole or a rectangular countersunk hole. The specific type of the countersunk hole can be adaptively set according to the screw used.

[0065] See also Figure 7 In a preferred embodiment of the present invention, the acetabular cup 120 is made of polyetheretherketone (PEEK) or a polyetheretherketone composite material;

[0066] The acetabular cup prosthesis 100 includes a first coating 140 , which is coated on the outer surface of the acetabular cup 120 .

[0067] It should be noted that the existing acetabular cup 120 is usually made of metal material, and the acetabular liner 130 is generally made of composite material. Since the materials of the two are very different, it is easier for the acetabular liner 130 composed of composite material to be severely worn. The acetabular cup 120 of the technical solution of the present invention is made of polyetheretherketone (PEEK) or polyetheretherketone composite material. The material type of the acetabular cup 120 and the acetabular liner 130 is similar, which reduces the wear of the acetabular liner 130. In addition, polyetheretherketone has excellent wear resistance, corrosion resistance and biocompatibility, which can meet the design requirements of the acetabular cup prosthesis 100. A first coating 140 is coated on the outer surface of the acetabular cup 120, and the material of the first coating 140 can be a metal material or a hydrophilic material. It is understandable that if the first coating 140 uses metal materials such as pure titanium, titanium alloy (such as Ti6Al4V, Ti6Al7Nb, etc.), tantalum metal, etc., the metal materials can promote the growth of bone tissue into the acetabular cup prosthesis 100 and make the acetabular cup prosthesis 100 have a certain antibacterial ability. If the first coating 140 uses hydrophilic materials such as hydroxyapatite, the hydrophilic materials can induce bone tissue to grow into the acetabular cup prosthesis 100 to achieve a long-term fixation effect.

[0068] Optionally, based on the above embodiments, the material of the acetabular liner 130 can be ultra-high molecular weight polyethylene, highly cross-linked ultra-high molecular weight polyethylene, ultra-high molecular weight polyethylene containing antioxidants (such as vitamin E) or highly cross-linked ultra-high molecular weight polyethylene, polycarbonate polyurethane (PCU) and the like, or it can be made of polyetheretherketone (PEEK) or a polyetheretherketone composite material.

[0069] Optionally, if the above-mentioned acetabular cup has only one layer of coating, the thickness of the first coating 140 is T1, wherein 20 μm ≤ T1 ≤ 1000 μm. It is understandable that if the thickness T1 of the first coating 140 is less than 20 μm, the fixation effect cannot be achieved or the fixation effect is poor; if the thickness T1 of the first coating 140 is greater than 1000 μm, the strength or adhesion of the first coating 140 is insufficient, and the first coating 140 may be powdered or sheared to produce cracks during the growth of bone tissue, thereby increasing the metal ion content in the body and increasing the burden on the patient's kidneys.

[0070] Alternatively, the value of T1 may be 20 μm, 100 μm, 500 μm, 750 μm, or 1000 μm.

[0071] Optionally, based on the above embodiment, the inner surface of the acetabular cup 120 is polished to make its surface roughness Ra≤2 μm, so as to further reduce the wear of the acetabular liner 130 relative to the inner surface of the acetabular cup 120 .

[0072] See also Fig. 9In another preferred embodiment of the present invention, the acetabular cup 120 is made of polyetheretherketone (PEEK) or a polyetheretherketone composite material;

[0073] The acetabular cup prosthesis 100 includes a first coating 140 and a second coating 142 stacked with the first coating 140 . The first coating 140 is close to and disposed on the outer surface of the acetabular cup 120 . The first coating 140 is made of metal material, and the second coating 142 is made of hydroxyapatite.

[0074] It is understandable that the material of the acetabular cup 120 can be a polyetheretherketone composite material such as carbon fiber reinforced polyetheretherketone. The material of the first coating 140 can be a metal material such as pure titanium, titanium alloy (such as Ti6Al4V, Ti6Al7Nb, etc.), tantalum metal, etc.

[0075] Optionally, in the above embodiment, the thickness of the first coating 140 is T2, where 50 μm ≤ T2 ≤ 900 μm; the thickness of the second coating 142 is T3, where 100 μm ≤ T3 ≤ 200 μm. It is understood that if the first coating 140 or the second coating 142 is too thin, the fixing effect is poor; if the first coating 140 or the second coating 142 is too thick, the strength or adhesion of the superimposed coating may be insufficient, causing cracks in the coating.

[0076] Optionally, the value of T2 may be 50 μm, 150 μm, 200 μm, 500 μm, or 900 μm; the value of T3 may be 100 μm, 120 μm, 150 μm, 180 μm, or 200 μm.

[0077] Optionally, the second coating 142 is an antibacterial coating, and the second coating 142 may be a coating of silver ions or copper ions or an antibacterial coating containing antibiotics.

[0078] In yet another embodiment, see Figure 7 and Figure 8 The material of the first coating is a metal composition, and the metal composition is a mixture of metal and hydroxyapatite; the composition ratio of the metal and hydroxyapatite in the first coating is gradually changed from the metal component greater than the hydroxyapatite to the metal component less than the hydroxyapatite along the normal direction away from the outer surface of the acetabular cup, so as to form a first coating with a metal gradient layer; wherein the metal is selected from the following materials: pure titanium, titanium alloy, and tantalum metal.

[0079] It should be noted that when the first coating 140 having a metal gradient layer is coated on the outer surface of the acetabular cup 120, it is necessary to prepare in advance a plurality of mixtures of a component having a metal component greater than hydroxyapatite and gradually changing the component having a metal component less than hydroxyapatite, and relatively changing the components of the two step by step, so as to prepare metal compositions with different component ratios. Then, the metal composition is coated on the surface of the acetabular cup 120 using an appropriate spraying method. During the coating process, the first coating 140 is controlled to be arranged gradually along the normal direction away from the outer surface of the acetabular cup 120, such that the component having a metal component greater than hydroxyapatite gradually changes to the component having a metal component less than hydroxyapatite.

[0080] It is understandable that the acetabular cup 120 is coated with a first coating 140 of a metal composition, which increases the bonding force with the bone tissue and makes the acetabular cup prosthesis 100 more stable and reliable. The hydroxyapatite in the metal composition helps promote the regeneration and healing of bone tissue, and induces the growth of bone tissue. The metal and coupling agent in the first coating can improve the wear resistance and corrosion resistance of the prosthesis. It is also understandable that according to the above-mentioned setting of the acetabular cup prosthesis 100, the hydroxyapatite component is more likely to contact the bone tissue, thereby promoting the regeneration and healing of bone tissue. The metal component is closer to the outer surface of the acetabular cup 120, which improves the strength, wear resistance and corrosion resistance of the acetabular cup. The spraying method of mixing the two components also improves the adhesion of the first coating 140 to the acetabular cup 120.

[0081] It can also be understood that the outer surface of the mixed metal composite also has a good antibacterial effect due to the presence of metal substances.

[0082] Optionally, see Figure 8 , the mixture of the metal and hydroxyapatite is divided into 5:1, 3:1, 1:1, 1:3, and 1:5 components and modulated respectively to obtain five mixtures with different component ratios; these five mixtures are used to sequentially apply to the outer surface of the acetabular cup 120 to form a first coating 140 with a metal gradient layer. It can be understood that the metal material is mainly used to improve the strength of the acetabular cup 120, promote bone fusion, and reduce the risk of postoperative infection. On the other hand, the use of spraying by mixing the two components also improves the adhesion between the first coating 140 and the acetabular cup 120.

[0083] See also Fig.10 In another embodiment of the present invention, the second coating 142 is annular and is coated on one side close to the port of the acetabular cup 120 .

[0084] It can be understood that the material of the second coating 142 is a hydrophilic material and is coated on one side close to the port of the acetabular cup 120, which can better induce the fusion of bone tissue and the acetabular cup 120 prosthesis and reduce the use of the second coating 142 material, so that the metal material of the first coating 140 is in direct contact with the human bone, thereby reducing the risk of surgical infection.

[0085] See also Fig. 9 or Fig.10 In another embodiment of the present invention, the acetabular cup 120 prosthesis 100 further includes a third coating layer, the third coating layer is stacked on the second coating layer 142, and the third coating layer is an antibacterial coating layer made of a material containing silver ions, copper ions, or a composition containing antibiotics. Optionally, when the third coating layer is an antibacterial coating layer made of a material containing silver ions, copper ions, or a composition containing antibiotics, the second coating layer 142 is a hydrophilic coating layer.

[0086] It can be understood that the above embodiment has at least three different types of coatings. The first coating 140 can promote the growth of bone tissue into the acetabular cup prosthesis 100 to achieve a long-term fixation effect; the second coating 142 can induce bone tissue to grow into the acetabular cup prosthesis 100; the third coating can inhibit the growth of bacteria and reduce the risk of more serious surgical infection in patients with a higher risk of surgical infection or lower immunity.

[0087] Optionally, the acetabular cup prosthesis 100 further includes a fourth coating, which is stacked on the second coating, and the fourth coating is a bioactive substance such as growth factors and cell adhesion molecules. It is understandable that the fourth coating is a bioactive substance that can be applied during hip replacement surgery to promote bone tissue growth.

[0088] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An acetabular cup prosthesis, characterized in that: It comprises an acetabular cup and an acetabular liner; the acetabular cup is made of polyetheretherketone or a polyetheretherketone composite material; The acetabular cup has an outer surface and an inner surface, and the outer surface of the acetabular cup is installed in the acetabulum of a human body; The acetabular liner has an outer surface and an inner surface for mounting a femoral ball head, and the outer surface of the acetabular liner is mounted on the acetabular cup and matched with the inner surface of the acetabular cup; The inner surface of the acetabular cup is formed with a slot, and the outer surface of the acetabular liner is provided with a first protrusion, and the first protrusion is engaged with the slot to fix the acetabular liner axially relative to the acetabular cup; The outer surface of the acetabular liner is also provided with a second protrusion, which is located on a side of the first protrusion close to the acetabular liner port, extends toward the acetabular cup, and abuts against the inner surface of the acetabular cup to block the gap between the acetabular cup and the acetabular liner; A plug-in groove is also formed at the connection between the inner surface of the acetabular cup and the end surface of the acetabular cup, and a third protrusion is provided on the outer surface of the acetabular liner, and the third protrusion is plugged and matched with the plug-in groove to radially fix the acetabular liner relative to the acetabular cup; The inner surface of the acetabular cup includes a conical surface, a dome surface and a plane surface, wherein the dome surface is connected to the conical surface, and the conical surface is close to the acetabular cup port; the plane surface is located at the top of the acetabular cup, and the conical surface, the dome surface and the plane surface are connected in sequence; wherein the conical surface is a Morse cone structure, and the cone angle of the conical surface is α, wherein 5°≤α≤30°; The acetabular cup prosthesis comprises a first coating and a second coating stacked with the first coating, wherein the first coating is close to and arranged on the outer surface of the acetabular cup; wherein the material of the first coating is a metal material, and the material of the second coating is hydroxyapatite; The second coating is annular and is coated on one side close to the acetabular cup port; The thickness of the first coating layer is T2, wherein 50 μm≤T2≤900 μm; the thickness of the second coating layer is T3, wherein 100 μm≤T3≤200 μm.

2. The acetabular cup prosthesis according to claim 1, characterized in that: The third protrusion has a first guide surface and a second guide surface, and the first guide surface and the second guide surface are used for guiding the third protrusion when it is installed in the plug-in slot.

3. The acetabular cup prosthesis according to claim 1, characterized in that: The material of the first coating is a metal composition, and the metal composition is a mixture of metal and hydroxyapatite; the composition ratio of the metal and hydroxyapatite is gradually arranged in a normal direction away from the outer surface of the acetabular cup, from a metal component greater than a hydroxyapatite component to a metal component less than a hydroxyapatite component, so as to form a first coating with a metal gradient layer; Wherein, the metal is selected from the following materials: pure titanium, titanium alloy, and tantalum metal.

4. The acetabular cup prosthesis according to claim 1, characterized in that: The acetabular cup prosthesis further includes a third coating layer, which is stacked on the second coating layer, and the material of the third coating layer is a composition containing silver ions or copper ions or antibiotics; Alternatively, the acetabular cup prosthesis further includes a fourth coating, the fourth coating is stacked on the second coating, and the fourth coating is a growth factor or a cell adhesion molecule.

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