Porous prosthesis

Abstract

The utility model relates to the technical field of subcutaneous implants in medical cosmetic plastic surgery, in particular to a porous prosthesis. The utility model discloses a porous prosthesis which comprises at least one prosthesis main body, and the prosthesis main body is of a three-dimensional structure with a plurality of open pores in the surface. The prosthesis main body is provided with a first component and a second component which are integrally processed and formed, each of the first component and the second component is provided with a supporting leg end extending outwards, and an included angle between the central axis of the supporting leg end of the first component and the central axis of the supporting leg end of the second component is an obtuse angle. The shape of the prosthesis is obtained from the contour foldover of the shape of the prosthesis engraved in a plurality of clinical operations, the model universality of the prosthesis used in the orbital surface filling operation is improved, meanwhile, the abundant opening structures can induce tissue cells to grow in, and fusion of the tissue cells and the prosthesis body is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of subcutaneous implants in medical aesthetic plastic surgery, and particularly relates to a porous prosthesis. Background Art

[0002] Medical aesthetics, also known as aesthetic medicine, improves and shapes people's appearance and body shape through surgical operations, drug treatments, medical equipment, and other invasive or traumatic medical technologies. With the rapid development of medical technology, new treatment methods and surgical procedures emerge in an endless stream, which not only improves the safety of medical aesthetics but also enhances its effects. For example, the application of innovative technologies such as laser technology, minimally invasive surgery, and 3D printing technology has brought higher personalization and precision to medical aesthetic services, thus promoting the widespread acceptance and development of this industry.

[0003] The orbital surface is a pair of bone cavities, and its main function is to accommodate the eyeball and its accessory structures. The orbital surface includes bones such as the zygomatic bone, sphenoid bone, maxilla, frontal bone, lacrimal bone, palatine bone, ethmoid bone, supraorbital ridge, or superciliary arch. The morphological adjustment of the orbital surface bones has a significant impact on enhancing the three-dimensional sense of the eyebrow-eye area. As an important part of the facial contour, the orbital surface structure directly affects the aesthetic appearance of the eyebrows, upper eyelids, and nasal root. Through plastic surgery, a filler with a certain thickness can be implanted in the orbital surface area to increase the height of the eyebrow arch, enhance the contrast between the eye socket and the eyebrows, create a deep eye look, make the eyebrows more harmonious with other facial features, and improve the three-dimensional sense and beauty of the overall face.

[0004] During orbital surface filling surgery, doctors will carefully carve a suitable filling prosthesis according to the specific conditions of the patient. The most commonly used material is silicone, but since silicone is a solid material, there is a risk of displacement after the prosthesis is implanted, and the human body may produce an immune response to form a fibrous capsule. In addition, due to the differences in the bone structures of each person, the shape of the orbital surface bones may be asymmetric, which requires considering these individual differences when carving the prosthesis to ensure a perfect adaptation of the surgical effect. Summary of the Utility Model

[0005] In view of the above technical problems, the utility model provides a porous prosthesis, which includes at least one prosthesis main body, and the prosthesis main body is set as a three-dimensional structure with a plurality of openings on its surface;

[0006] The prosthesis main body has a first component and a second component formed by integral processing, and both the first component and the second component have outstretched leg ends. Among them,

[0007] The included angle between the central axes of the leg ends of the first component and the central axes of the leg ends of the second component is an obtuse angle.

[0008] Preferably, the opening is a through-hole penetrating the prosthesis main body; or the opening is a counterbore not penetrating the prosthesis main body; or the opening includes both a through-hole penetrating the prosthesis main body and a counterbore not penetrating the prosthesis main body.

[0009] Preferably, the prosthesis includes two prosthesis main bodies that are mirror-symmetrical.

[0010] Each prosthesis main body has a bottom surface and a top surface. The orthographic projection of the top surface on the bottom surface is located within the contour line of the bottom surface, and there is a smooth curved surface transition between the top surface and the bottom surface.

[0011] Preferably, the bottom surface is a curved surface concave towards the top surface, and the shape of the curved surface matches the shape of the bone at the human eyebrow arch.

[0012] Preferably, the orthographic projection of the bottom surface includes a first side edge, a second side edge, and a third side edge, as well as a first top edge, a second top edge, and a third top edge; the first side edge, the first top edge, the second side edge, the second top edge, the third side edge, and the third top edge are smoothly connected end to end in sequence to form a closed loop.

[0013] The third side edge is a concave arc towards the center point of the bottom surface.

[0014] Preferably, the length of the first member is equal to the horizontal distance between the endpoints of the first side edge, which is 25 mm to 80 mm; the length of the second member is equal to the horizontal distance between the endpoints of the second side edge, which is 20 mm to 60 mm; and the radius of curvature of the third side edge is 20 mm to 200 mm.

[0015] Preferably, the prosthesis main body further has a third member integrally formed with the first member and the second member. The third member has a protruding foot end, and the third member and the second member are axisymmetric with the central axis of the foot end of the first member as the axis.

[0016] Preferably, the orthographic projection of the bottom surface includes a first side edge, a second side edge, and a third side edge, as well as a first top edge, a second top edge, and a third top edge; the first side edge, the first top edge, the second side edge, the second top edge, the third side edge, and the third top edge are smoothly connected end to end in sequence to form a closed loop.

[0017] The first side edge, the second side edge, and the third side edge are concave arcs towards the center point of the bottom surface.

[0018] Preferably, the central axes of the foot ends of the first member, the central axes of the foot ends of the second member, and the central axes of the foot ends of the third member start from the intersection point of the central axes of the foot ends of the first member, the central axes of the foot ends of the second member, and the central axes of the foot ends of the third member, and are evenly distributed at an equal angular interval of 120°.

[0019] Preferably, the ratio of the length of the first component to the lengths of the second and third components is 1.4:1 to 1.5:1.

[0020] Preferably, the vertical distance between the top surface and the point on the bottom surface closest to the top surface is 1 mm to 6.5 mm.

[0021] Preferably, the opening is formed by laser drilling, numerical control drilling, or 3D printing.

[0022] Preferably, the aperture of the opening is 0.1 mm to 2 mm, and the porosity of the opening is 40% to 80%.

[0023] Preferably, the openings communicate with each other.

[0024] Compared with the prior art, the beneficial effects of a porous prosthesis provided by the present utility model are as follows:

[0025] (1) The prosthesis shape provided by the present utility model has model versatility and can adapt to most orbital surface filling surgeries.

[0026] (2) The three-dimensional porous structure can induce the growth of tissue cells into it, realize the fusion of tissue cells and the prosthesis main body, play a role in fixing the prosthesis, thereby preventing the prosthesis from sagging, and can effectively avoid the phenomenon of the formation of a fibrous capsule by the existing silicone prosthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present utility model will be further described below with reference to the accompanying drawings.

[0028] Figure 1 is a multi-view drawing of the prosthesis main body in an exemplary embodiment of the present utility model;

[0029] Figure 2 is a multi-view drawing of the prosthesis main body in another exemplary embodiment of the present utility model;

[0030] Figure 3 is the present utility model Figure 2 a three-dimensional schematic diagram of the prosthesis main body in an embodiment;

[0031] Figure 4 is a multi-view drawing of the prosthesis main body in another exemplary embodiment of the present utility model;

[0032] Figure 5 is a multi-view drawing of the prosthesis main body in another exemplary embodiment of the present utility model;

[0033] Figure 6 is the present utility model Figure 5 a three-dimensional schematic diagram of the prosthesis main body in an embodiment of the present utility model.

[0034] The description of the reference numerals in the drawings is as follows:

[0035] In the figure: 1. Prosthesis main body; 11. First component; 12. Second component; 13. Third component; 2. Bottom surface; 21. First side edge; 22. Second side edge; 23. Third side edge; 24. First top edge; 25. Second top edge; 26. Third top edge; 3. Top surface; 4. Opening. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model.

[0038] In addition, the "first", "second", "outer end", "inner end" and similar terms used in the present utility model do not represent any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0039] It should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0040] All terms used in this utility model have the same meanings as those understood by those of ordinary skill in the art to which this utility model pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such herein.

[0041] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.

[0042] As Figures 1 - 6 shown, in one embodiment of this utility model, a porous prosthesis is provided. The prosthesis includes at least one prosthesis main body 1, and the prosthesis main body 1 is arranged as a three-dimensional structure with a number of openings on its surface; the prosthesis main body 1 has a first member 11 and a second member 12 integrally formed, and both the first member 11 and the second member 12 have outstretched leg ends, wherein,

[0043] the included angle between the central axes of the leg ends of the first member 11 and the central axes of the leg ends of the second member 12 is an obtuse angle.

[0044] It should be noted that the prosthesis main body 1 is configured as a three-dimensional porous structure, and each of the openings 4 in the three-dimensional porous structure is provided on the surface of the prosthesis main body 1; the above three-dimensional porous structure can induce tissue cells to grow in, realize the fusion of tissue cells and the prosthesis main body 1, play a role in fixing the prosthesis, thereby preventing the prosthesis from sagging, and no fibrous capsule will be formed.

[0045] In one embodiment, the opening 4 is a through hole penetrating the prosthesis main body 1; or the opening 4 is a counterbore not penetrating the prosthesis main body 1; or the opening 4 includes both a through hole penetrating the prosthesis main body 1 and a counterbore not penetrating the prosthesis main body 1.

[0046] As Figures 1 - 6 shown, the shape of the prosthesis provided by this utility model has model versatility and can adapt to most orbital surface filling surgeries. As shown in the prosthesis provided by this utility model as Figure 1 , the leg ends of the first member 11 and the second member 12 can adopt a round head design, which is convenient for doctors to carve. The rounded corners enable the prosthesis to be smoothly connected with human tissues after implantation, reducing the sense of boundary. In another embodiment, as Figure 2 , 3 shown, the leg ends can adopt a square head design. There are different defects in the orbital bones of different people, and there is a possibility that the legs of the prosthesis are left-biased or right-biased. The square head design of the prosthesis shape provided by this utility model can avoid the situation of insufficient carving space for the prosthesis main body and facilitate doctors to design the bias of the legs.

[0047] In one embodiment, the prosthesis includes two prosthesis bodies 1 that are mirror-symmetrical; each prosthesis body 1 has a bottom surface 2 and a top surface 3, and the orthographic projection of the top surface 3 on the bottom surface 2 is located within the contour line of the bottom surface. There is a smooth curved surface transition between the top surface 3 and the bottom surface 2. By adding the distinction between the top surface 3 and the bottom surface 2 to the prosthesis body, that is, the cross-sectional area of the top surface 3 is smaller than that of the bottom surface 2, it can help the doctor distinguish between the left and right prostheses. At the same time, because the bottom surface 2 is located more inside the human body relative to the top surface 3 during the eyebrow arch filling surgery, the bottom surface 2 needs to fit the bone at the eyebrow arch of the human body, and the top surface 3 requires a smaller cross-sectional area. Therefore, limiting the top surface 3 within the contour line of the orthographic projection on the bottom surface 2 can reduce the workload of the doctor carving and cutting the prosthesis body 1 and can facilitate the doctor to improve the surgical efficiency. At the same time, the smooth transition between the top surface 3 and the bottom surface 2 can make the prosthesis more natural and beautiful after implantation.

[0048] In a specific embodiment, the bottom surface 2 is a curved surface that is concave towards the top surface, and the shape of the curved surface matches the shape of the bone at the eyebrow arch of the human body. The outer contour of the curved surface includes three side edges, and the side edges are connected to each other by top edges. In another specific embodiment, the bottom surface 2 can be a plane, and the plane can be deformed into a curved surface that matches the shape of the bone at the eyebrow arch of the human body under the condition that an external force is applied to the prosthesis body 1. The outer contour of the curved surface includes three side edges, and the side edges are connected to each other by top edges.

[0049] The present utility model improves the fit between the prosthesis body 1 and the anatomical structure of the orbital surface through the shape of the cooperation between the top edges and the side edges. The three top edges can limit the prosthesis from three directions, reducing the risk of displacement. The longer side edges are convenient for implantation and can achieve a natural appearance after implantation.

[0050] In one embodiment, as Figures 1 to 3 shown, the orthographic projection of the bottom surface 2 includes a first side edge 21, a second side edge 22, and a third side edge 23, and a first top edge 24, a second top edge 25, and a third top edge 26; the first side edge 21, the first top edge 24, the second side edge 22, the second top edge 25, the third side edge 23, and the third top edge 26 are smoothly connected end to end in sequence to form a closed loop; the third side edge 23 is an arc that is concave towards the center point of the bottom surface 2; the orthographic projection of the bottom surface 2 of the first member 11 includes the first side edge 21, the third top edge 26, and a part of the third side edge 23; the orthographic projection of the bottom surface 2 of the second member 12 includes the second side edge 22, the second top edge 25, and another part of the third side edge 23.

[0051] In one embodiment, the length a of the first member 11 is equal to the horizontal distance between the endpoints of the first side 21, which is 25 mm to 80 mm. The length b of the second member 12 is equal to the horizontal distance between the endpoints of the second side 22, which is 20 mm to 60 mm. The radius of curvature of the third side 23 is 20 mm to 200 mm. The first member 11 is used to fill the supraorbital ridge, and the second member 12 is used to support the supraorbital prosthesis. The longer length of the first member 11 than the second member 12 can be used to help the doctor make a distinction.

[0052] In another embodiment, the length a of the first member 11 is equal to the horizontal distance between the endpoints of the first side 21, which is 20 mm to 60 mm. The length b of the second member 12 is equal to the horizontal distance between the endpoints of the second side 22, which is 25 mm to 80 mm. The radius of curvature of the third side 23 is 20 mm to 200 mm. The first member 11 is used to support the supraorbital prosthesis, and the second member 12 is used to fill the supraorbital ridge. The shorter length of the first member 11 than the second member 12 can be used to help the doctor make a distinction.

[0053] In one embodiment, as Figures 4 to 6 shown, the prosthesis body 1 further has a third member 13 integrally formed with the first member 11 and the second member 12. The third member 13 has a protruding foot end. The third member 13 and the second member 12 are axisymmetric about the central axis of the foot end of the first member 11. In the surgery of filling the supraorbital ridge, the temporal bone can be further filled to improve the postoperative visual effect and increase the three-dimensional degree of the facial features. The third member 13 can be used to fill the temporal bone. Among them, since the second member 12 and the third member 13 are axisymmetric about the central axis of the foot end of the first member 11, their lengths and angles are exactly the same. When the prosthesis body 1 has a non-coincident bottom surface 2 and top surface 3, the prosthesis can still achieve a general preformed design of the same model without distinguishing between left and right, so that the hospital does not need to distinguish between left and right when purchasing. In Figure 3 it, the central axis of the foot end of the first member 11 is the e-axis, the central axis of the foot end of the second member 12 is the g-axis, and the central axis of the foot end of the third member 13 is the f-axis. In a specific embodiment, the first member 11 is used to fill the supraorbital ridge, the second member 12 is used to support the supraorbital ridge, the third member 13 is used to fill the temporal bone, and the prosthesis body 1 is used for the left facial filling surgery. In another specific embodiment, the first member 11 is used to fill the supraorbital ridge, the second member 12 is used to fill the temporal bone, the third member 13 is used to support the supraorbital ridge, and the prosthesis body 1 is used for the right facial filling surgery.

[0054] In a specific embodiment, the orthographic projection of the bottom surface 2 includes a first side edge 21, a second side edge 22, and a third side edge 23, as well as a first top edge 24, a second top edge 25, and a third top edge 26; the first side edge 21, the first top edge 24, the second side edge 22, the second top edge 25, the third side edge 23, and the third top edge 26 are smoothly connected end to end in sequence to form a closed loop; the first side edge 21, the second side edge 22, and the third side edge 23 are arcs concave towards the center point of the bottom surface; the orthographic projection of the bottom surface 2 of the first member 11 includes a part of the first side edge 21, the third top edge 26, and a part of the third side edge 23; the orthographic projection of the bottom surface 2 of the second member 12 includes a part of the second side edge 22, the second top edge 25, and a part of the third side edge 23; the orthographic projection of the bottom surface 2 of the third member 13 includes a part of the third side edge 23, the first top edge 24, and a part of the second side edge 22.

[0055] In one embodiment, the central axes e-axis of the support foot end of the first member 11, the central axis g-axis of the support foot end of the second member 12, and the central axis f-axis of the support foot end of the third member 13 start from the intersection point of the central axis e-axis of the support foot end of the first member 11, the central axis g-axis of the support foot end of the second member 12, and the central axis f-axis of the support foot end of the third member 13, and are evenly distributed at an equal angular interval of 120°. As Figure 3 shown, Figure 3 is a multi-view drawing of the prosthesis main body of another exemplary embodiment of the present invention; the first member 11, the second member 12, and the third member 13 are evenly distributed.

[0056] In one embodiment, as Figures 4 to 6 shown, the ratio of the length of the first member 11 to the lengths of the second member 12 and the third member 13 is 1.4:1 to 1.5:1. By setting the length of the first member 11 to be greater than the lengths of the second member 12 and the third member 13, it can be used as an anti-mistake design to prevent confusion during the doctor's surgical carving and facilitate the identification of the first member 11 and other members. In a specific embodiment, the ratio of the length of the first member 11 to the lengths of the second member 12 and the third member 13 is 1.48.

[0057] In one embodiment, the vertical distance h between the top surface 3 and the point on the bottom surface 2 closest to the top surface 3 is 1 mm to 6.5 mm. Specifically, the vertical distance h can be 6.5 mm, or 6 mm, or 5.5 mm, or 5 mm, or 4.5 mm, or 3 mm, or 2.5 mm, or 2 mm.

[0058] It should be noted that the longitudinal distance between the highest points of the top surface 3 and the bottom surface 2 can be adjusted according to the needs of people in different age groups for the supraorbital ridge prosthesis.

[0059] In one embodiment, the prosthesis body 1 can be obtained in the following manner: mixing polytetrafluoroethylene dispersion resin and solvent oil in a preset ratio and preforming to obtain a solid mixture; extruding the solid mixture to obtain a polytetrafluoroethylene sheet; drying the polytetrafluoroethylene sheet to remove the solvent oil, stretching it at a temperature of 180°C to 300°C, and sintering it at 300°C to 370°C to obtain a sheet-shaped expanded material 4, stacking multiple layers of the sheet-shaped expanded material 4 and performing high-temperature pressing to obtain a raw prosthesis; or, stacking multiple layers of the polytetrafluoroethylene sheets, drying to remove the solvent oil, stretching at a temperature of 180°C to 300°C, and sintering at 300°C to 370°C to obtain a sheet-shaped expanded material 4, pressing at least one layer of the sheet-shaped expanded material 4, and obtaining a raw prosthesis with multiple openings 4 by mechanical punching; carving the raw prosthesis to obtain the prosthesis body 1.

[0060] In another embodiment, the raw material of the prosthesis body 1 can also be polyetheretherketone (PEEK). Polyetheretherketone is a special engineering plastic with extremely high mechanical strength and heat resistance, and can maintain stability even at high temperatures. The heat distortion temperature of PEEK is as high as 160°C (320°F), and it can withstand a continuous working temperature of 250°C (482°F). PEEK also has good corrosion resistance, can resist a variety of chemical substances, including acids, alkalis, and organic solvents, and has excellent biocompatibility, making it suitable for use as medical implants such as prostheses.

[0061] In another embodiment, the raw material of the prosthesis body 1 can also be silicone or other materials with good biocompatibility.

[0062] In one embodiment, the opening 4 is obtained by laser drilling, numerically controlled drilling or 3D printing. Laser drilling is a precise laser processing technology that uses a high-energy laser beam to perform non-contact processing on materials. This technology is renowned for its high precision and flexibility and is widely used in various industrial fields. The process of laser drilling begins with the design phase. Designers use computer-aided design (CAD) and other graphic processing software, such as CorelDraw, to create the required drilling patterns or graphics. After the design is completed, this graphic data is transmitted to the laser processing machine. The laser processing machine is equipped with a precise control system that can identify and interpret the design file and then perform drilling operations on the material surface according to the precise graphic structure of the design. The laser processing machine can adjust the power, speed and other relevant parameters of the laser according to the material properties and design requirements to control the size of the aperture, the depth of the hole and the porosity, etc. The advantage of this technology is that it can quickly and accurately create complex pore channels on various hard and soft materials, including but not limited to metals, plastics, wood, ceramics and textiles. Laser drilling not only improves production efficiency but also reduces material waste, and at the same time can achieve a level of fineness and customization that is difficult to achieve with traditional processing methods. Numerically controlled drilling is a high-precision and high-efficiency automated processing technology that uses a computer numerical control (CNC) system to guide the drilling machine to perform precise drilling on the material according to a predetermined program. This process first requires converting the design drawing or model into a numerical control program, which contains parameters such as the specific position, size and depth of the drilling. After the numerical control machine receives the program, its control unit will accurately move the tool on the machine to position and process the material, realizing automated drilling. It is suitable for mass production and the processing of parts with complex shapes, and has high repeatability, high efficiency and simplicity of operation. 3D printing, also known as additive manufacturing, is a manufacturing technology that creates three-dimensional objects by adding materials layer by layer. It usually involves using digital model files generated by computer-aided design (CAD) software and then converting the model into a physical object through a 3D printer. The advantages of 3D printing include high design flexibility, the ability to manufacture complex geometric shapes and internal structures; high production efficiency, reducing the need for molds and tools in traditional manufacturing; high material utilization rate, reducing waste; and strong personalized and small-batch production capabilities, being able to quickly respond to market and customer needs. In addition, 3D printing also supports rapid prototyping, accelerating the product development cycle. At the same time, in some fields, such as aerospace and medical, 3D printing technology can also achieve customization and functional gradient design, further improving product performance. In the present utility model, a prosthesis that meets personalized needs can be directly printed integrally by customizing the prosthesis and precisely designing the lengths and included angles of the first member 11 and the second member 12 of the prosthesis body and the layout of the three-dimensional opening 4.

[0063] In one embodiment, when the original prosthesis is carved to obtain the prosthesis main body 1, it can be correspondingly carved in advance according to the physiological structure and shape of the customer's eyebrow arch, so that the curved shape of the bottom surface 2 matches the shape of the bone at the human eyebrow arch, or the bottom surface 2 can be set as a plane, and the plane can be deformed into a curved surface matching the shape of the bone at the human eyebrow arch under the condition that the prosthesis main body 1 is carved or other external forces are applied.

[0064] In one embodiment, the aperture diameter of the opening 4 is 0.1 mm to 2 mm; preferably, it is 0.1 mm to 2 mm; more preferably, it is 0.1 mm to 0.5 mm; more preferably, it is 0.1 mm to 0.2 mm; more preferably, it is 0.1 mm to 0.15 mm. It should be noted that the aperture diameter of the opening 4 is adaptively set to match the size of tissue cells, which can better induce tissue cells into the opening 4, and then better realize the fusion of tissue cells and the prosthesis main body 1.

[0065] In one embodiment, the porosity of the prosthesis main body 1 is 40% to 80%; preferably, it is 40% to 75%; preferably, it is 60% to 75%; preferably, it is 65% to 75%; preferably, it is 65% to 70%. The prosthesis main body 1 with a pore structure is usually lighter than solid materials, reducing the burden on surrounding tissues. Tissue ingrowth into the pores can also increase the fixation of the prosthesis and reduce prosthesis displacement or rotation caused by daily activities.

[0066] In one embodiment, the openings 4 can communicate with each other. On the one hand, it makes more connected cavities in the three-dimensional porous structure, that is, reduces the "dead space" in the prosthesis, which is more conducive to the ingrowth of human tissues and stability after prosthesis implantation. On the other hand, it makes the prosthesis lighter in mass, which is beneficial to reducing the human load.

[0067] The prosthesis of the present utility model adopts a non-degradable material, which is implanted once and can be used for life; the material has excellent biocompatibility, and the prosthesis has a physiological structure simulating the human eyebrow bone, with better fitting performance. In addition, the prosthesis main body 1 has been preformed before the operation, and only partial adjustment and detailed carving are required, reducing the time for doctors to carve the prosthesis during the operation and reducing the risk of prosthesis contamination, thereby reducing the risk of postoperative infection.

[0068] So far, the embodiments of the present utility model have been described in detail. To avoid obscuring the concept of the present utility model, some details well known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.

[0069] Although some specific embodiments of the present utility model have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustration purposes only and not for limiting the scope of the present utility model. Those skilled in the art should understand that the above embodiments can be modified or partial technical features can be equivalently replaced without departing from the scope and spirit of the present utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. However, various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined in the present utility model can be implemented in other embodiments without departing from the spirit or scope of the present utility model.

Claims

1. A porous prosthesis, characterized in that, The prosthesis includes at least one prosthesis body (1), and the prosthesis body (1) is arranged as a three-dimensional structure with a number of openings on its surface; The prosthesis body (1) has a first member (11) and a second member (12) integrally formed, and both the first member (11) and the second member (12) have outstretched leg ends. Among them, The included angle between the central axes of the leg ends of the first member (11) and the central axes of the leg ends of the second member (12) is an obtuse angle.

2. The prosthesis according to claim 1, characterized in that, The opening (4) is a through hole penetrating the prosthesis body (1); or the opening (4) is a counterbore not penetrating the prosthesis body (1); or the opening (4) simultaneously includes a through hole penetrating the prosthesis body (1) and a counterbore not penetrating the prosthesis body (1).

3. The prosthesis according to claim 1, wherein The prosthesis includes two prosthesis bodies (1) that are mirror-symmetrical; Each prosthesis body (1) has a bottom surface (2) and a top surface (3). The orthographic projection of the top surface (3) on the bottom surface (2) is located within the contour line of the bottom surface, and there is a smooth curved surface transition between the top surface (3) and the bottom surface (2).

4. The prosthesis according to claim 3, characterized in that, The bottom surface (2) is a curved surface concave towards the top surface (3), and the shape of the curved surface matches the shape of the bone at the human eyebrow arch.

5. The prosthesis according to claim 4, wherein The orthographic projection of the bottom surface (2) includes a first side edge (21), a second side edge (22), and a third side edge (23), as well as a first top edge (24), a second top edge (25), and a third top edge (26); the first side edge (21), the first top edge (24), the second side edge (22), the second top edge (25), the third side edge (23), and the third top edge (26) are smoothly connected end to end in sequence to form a closed loop; The third side edge (23) is an arc concave towards the center point of the bottom surface (2).

6. The prosthesis according to claim 5, wherein, The length of the first member (11) is equal to the horizontal distance between the endpoints of the first side edge (21), and is 25 mm to 80 mm. The length of the second member (12) is equal to the horizontal distance between the endpoints of the second side edge (22) and is 20 mm to 60 mm. The radius of curvature of the third side edge (23) is 20 mm to 200 mm.

7. The prosthesis according to claim 4, characterized in that, The prosthesis body (1) also has a third member (13) integrally formed with the first member (11) and the second member (12). The third member (13) has an outstretched leg end, and the third member (13) and the second member (12) are axisymmetric about the central axis of the leg end of the first member (11).

8. The prosthesis according to claim 7, wherein The orthographic projection of the bottom surface (2) includes a first side edge (21), a second side edge (22), and a third side edge (23), as well as a first top edge (24), a second top edge (25), and a third top edge (26); the first side edge (21), the first top edge (24), the second side edge (22), the second top edge (25), the third side edge (23), and the third top edge (26) are smoothly connected end to end in sequence to form a closed loop; The first side edge (21), the second side edge (22), and the third side edge (23) are arcs concave towards the center point of the bottom surface (2).

9. The prosthesis according to claim 8, wherein The central axes of the foot ends of the first member (11), the central axes of the foot ends of the second member (12), and the central axes of the foot ends of the third member (13) are evenly distributed at an equal angular interval of 120° starting from the intersection point of the central axes of the foot ends of the first member (11), the central axes of the foot ends of the second member (12), and the central axes of the foot ends of the third member (13).

10. The prosthesis according to claim 9, characterized in that, The ratio of the length of the first member (11) to the lengths of the second member (12) and the third member (13) is 1.4:1 to 1.5:

1.

11. The prosthesis according to claim 3 or 7, characterized in that, The vertical distance between the top surface (3) and the point on the bottom surface (2) closest to the top surface (3) is 1 mm to 6.5 mm.

12. The prosthesis according to claim 1, wherein, The opening (4) is obtained by laser drilling or numerical control drilling or 3D printing.

13. The prosthesis according to claim 1, characterized in that, The aperture of the opening (4) is 0.1 mm to 2 mm, and the porosity of the opening (4) is 40% to 80%.

14. The prosthesis according to claim 1, characterized in that, The openings (4) communicate with each other.

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