Eyebrow arch prosthesis
By using multi-layer sheet-shaped expanded polytetrafluoroethylene material, the micropore structure induces tissue cell fusion, the existing eyebrow arch prosthesis is easily aged and fallen, and better results are achieved biocompatibility and stability.
Patent Information
- Application Number
- CN202323326228.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-07
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2033-12-07
AI Technical Summary
Existing eyebrow arch prosthesis is prone to aging, easily forming fiber encapsulation, and easily displaced and fell under the movement of muscle groups. The existing technology is difficult to fundamentally solve these problems.
The eyebrow prosthesis is made of a multi-layer sheet-shaped expanded polytetrafluoroethylene material. The material is distributed with a microporous structure for histocyte growth, which can induce histocytes to grow and fuse with the prosthesis to fix the prosthesis position. , avoid falling and improve biocompatibility.
The good fusion of the eyebrow arch prosthesis and human tissue is achieved, preventing the prosthesis from falling, avoiding the formation of fiber encapsulation, and improving the biocompatibility and safety of the material.
Smart Images
Figure CN222444440U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of subcutaneous implants in minimally invasive medical cosmetic plastic surgery, and in particular to a brow arch prosthesis. Background Art
[0002] Medical cosmetology refers to the use of drugs, surgery, medical devices and other invasive or irreversible medical techniques to repair and reshape the appearance and shape of human body parts. It originated in ancient Egypt. With the development of social economy and the improvement of people's living standards, medical cosmetology, especially minimally invasive medical cosmetology, has received more and more attention.
[0003] The brow arch is also called the "brow bone" or "brow ridge". It is located below the forehead. It is an arch-shaped protrusion parallel to the frontal tubercle and the upper orbital margin. It is an arch-shaped protrusion bone located above the upper orbital margin. Brow lift surgery is one of the most common plastic surgeries in minimally invasive medical cosmetic surgery. After the brow arch is prominent, the relative height difference between the eye socket and the eyebrow can be strengthened. It can not only deepen the eye socket and strengthen the three-dimensional features of the forehead, but also make the eyes look deeper.
[0004] During the brow lift surgery, a certain thickness of filler needs to be buried in the brow tissue when the brow arch changes from low to high. The most commonly used material for prosthetic filling of brow arches is silicone. However, the silicone material itself is a solid, and the immune mechanism of the human body's own tissues can easily lead to the formation of fibrous capsules; at the same time, the silicone material itself has an aging cycle, and long-term filling in the human body will cause many safety problems. In addition, what is more challenging is that the muscle groups of the eyes exercise countless times a day, and the implanted silicone brow prosthesis will be severely displaced, such as falling, under the frequent activity of the muscle groups and the gravity of the brow prosthesis itself. The existing brow prosthesis intends to limit the brow prosthesis by setting additional fixing parts, which not only increases the cost of surgery, but also fails to fundamentally solve the technical problem of poor limiting effect of the brow prosthesis. For example, patent CN20398849U discloses setting an additional guide clamping part on the brow prosthesis, and the raw material used is not biocompatible with human tissue. Utility Model Content
[0005] The main purpose of the present application is to propose a brow arch prosthesis, aiming to solve at least one of the technical problems that the existing brow arch prosthesis is prone to aging, prone to forming fibrous capsules under the immune mechanism of the human body's own tissues, and prone to serious displacement due to frequent activities of muscle groups and the action of the brow arch prosthesis's own gravity.
[0006] In order to solve the deficiencies of the prior art, the utility model provides a brow arch prosthesis, which comprises:
[0007] Two prosthesis bodies with mirror symmetry;
[0008] Each of the prosthesis bodies has a bottom surface and a top surface, and the bottom surface and the top surface have a smooth transition;
[0009] The bottom surface is a curved surface that is concave toward the top surface, and the shape of the curved surface matches the shape of the bone at the eyebrow arch of the human body;
[0010] The orthographic projection of the top surface on the bottom surface is located within the contour line of the bottom surface, and the top surface gradually narrows toward both side ends;
[0011] The prosthesis body is made of multiple layers of sheet-like expanded material laminated together, and each layer of the expanded material is distributed with a microporous structure for tissue cell growth.
[0012] A brow arch prosthesis, comprising:
[0013] Two prosthesis bodies with mirror symmetry;
[0014] Each of the prosthesis bodies has a bottom surface and a top surface, and the bottom surface and the top surface have a smooth transition;
[0015] The bottom surface is a plane, and the plane can be deformed into a curved surface matching the shape of the bone at the brow arch of the human body under the condition that an external force is applied to the prosthesis body;
[0016] The orthographic projection of the top surface on the bottom surface is located within the contour line of the bottom surface, and the top surface gradually narrows toward both side ends;
[0017] The prosthesis body is made of multiple layers of sheet-like expanded material laminated together, and each layer of the expanded material is distributed with a microporous structure for tissue cell growth.
[0018] In some embodiments, the sheet-like expanded material is a sheet-like expanded polytetrafluoroethylene.
[0019] In some embodiments, the weight average molecular weight of the expanded polytetrafluoroethylene ranges from 3,500,000 to 8,500,000.
[0020] In some embodiments, the pore size of the microporous structure is 10 micrometers to 40 micrometers.
[0021] In some embodiments, the prosthesis body has a porosity of 40% to 80%.
[0022] In some embodiments, the sheet-like expanded polytetrafluoroethylene is obtained by stretching one or more layers of raw material sheets with a thickness of 0.8 mm to 2 mm at a temperature of 180° C. to 300° C.
[0023] In some embodiments, the orthographic projection of the bottom surface includes a first straight side, a first arc side, a second straight side, and a second arc side. The first straight side, the first arc side, the second straight side, and the second arc side are smoothly connected end to end to form a closed loop. The angle between the extension lines of the first straight side and the second straight side is greater than or equal to 90°. The length of the first straight side is greater than the length of the second straight side. Both the first arc side and the second arc side are circular arcs, and the radius of curvature of the first arc side is smaller than the radius of curvature of the second arc side. The second arc side is concave toward the first arc side.
[0024] In some embodiments, the upper end of the top surface also includes a plane, which includes a third arc edge and a fourth arc edge that are smoothly connected, the third arc edge is closer to the first arc edge than the fourth arc edge, the curvature radius of the third arc edge is smaller than the curvature radius of the fourth arc edge, and the fourth arc edge is concave toward the third arc edge.
[0025] In some embodiments, the first straight edge and the second straight edge are both tangent to the first arc edge, the sum of the length of the first straight edge and the curvature radius of the first arc edge is 25mm to 80mm, the sum of the length of the second straight edge and the curvature radius of the first arc edge is 20mm to 60mm, and the curvature radius of the first arc edge is 0mm to 50mm.
[0026] In some embodiments, the radius of curvature of the second arc edge is 20 mm to 200 mm.
[0027] In some embodiments, a vertical distance between a plane where the third arc edge and the fourth arc edge are located and a point on the bottom surface closest to the plane is 2 mm to 6.5 mm.
[0028] In some embodiments, in the orthographic projection of the bottom surface, the minimum distance between the second arc edge and the first straight edge ranges from 0 mm to 30 mm, and the minimum distance between the second arc edge and the first straight edge ranges from 0 mm to 30 mm.
[0029] In some embodiments, the prosthesis body is free of binder.
[0030] In some embodiments, a binder is contained between the sheet-like expanded material layers, and the binder is poly(perfluoroethylene propylene).
[0031] Compared with the prior art, the brow arch prosthesis provided by the utility model has the following beneficial effects:
[0032] (1) The shape of the eyebrow prosthesis provided by the utility model fits the physiological structure of the bones at the eyebrow arch of the human body; the expanded polytetrafluoroethylene material used has good biocompatibility with human tissue cells, high safety, and is not easy to age;
[0033] (2) The prosthesis body made of multiple layers of expanded sheet material is rich in microporous structures, which can induce tissue cells to grow in, achieve the fusion of tissue cells and the prosthesis body, play a role in fixing the prosthesis, thereby preventing the prosthesis from falling, and can effectively avoid the phenomenon of fibrous capsules formed by existing silicone prostheses. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0035] Figure 1 It is a front view of an embodiment of the utility model;
[0036] Figure 2 It is a top view of an embodiment of the utility model;
[0037] Figure 3 It is a left side view of an embodiment of the utility model;
[0038] Figure 4-5 yes Figure 1 The cross-sectional view along the AA line in the figure shows the cross-sectional structure of the prosthesis body with and without the adhesive respectively;
[0039] Figure 6 It is a microscopic schematic diagram of the local microporous structure of the eyebrow arch prosthesis in the utility model.
[0040] The following are the descriptions of the reference numerals:
[0041] In the figure: 1, bottom surface; 11, first straight edge; 12, first arc edge; 13, second straight edge; 14, second arc edge; 2, top surface; 21, third arc edge; 22, fourth arc edge; 3, sheet expanded polytetrafluoroethylene; 4, adhesive; 5, microporous structure. DETAILED DESCRIPTION
[0042] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.
[0043] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.
[0044] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0045] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.
[0046] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being 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.
[0047] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.
[0048] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.
[0049] Example 1
[0050] See also Figure 1-Figure 6 As shown, this embodiment provides a brow arch prosthesis, which includes: two prosthesis bodies that are mirror-symmetrical; each of the prosthesis bodies has a bottom surface 1 and a top surface 2, and the bottom surface 1 and the top surface 2 have a smooth transition; the bottom surface 1 is a curved surface that is concave toward the top surface 2, and the shape of the curved surface matches the shape of the bones at the brow arch of the human body; the orthographic projection of the top surface 2 on the bottom surface 1 is located within the contour line of the bottom surface, and the top surface 2 gradually narrows toward the two side ends; the prosthesis body is laminated by multiple layers of sheet-like expanded material, and each layer of the expanded material is distributed with a microporous structure 5 for the growth of tissue cells.
[0051] It should be noted that the prosthesis body is configured to be laminated with multiple layers of sheet-like expanded material, and each layer of the expanded material is distributed with a microporous structure for tissue cell growth. The above structure can induce tissue cells to grow in, achieve the fusion of tissue cells and the prosthesis body, and play a role in fixing the prosthesis, thereby preventing the prosthesis from falling and forming a fibrous capsule.
[0052] In this embodiment, the sheet-like expanded material is a sheet-like expanded polytetrafluoroethylene.
[0053] It should be noted that expanded polytetrafluoroethylene (ePTFE) has a network structure formed by connecting fine fibers, and these fine fibers form countless pores; in addition, expanded polytetrafluoroethylene has good biocompatibility, is not easy to deform or deteriorate, does not produce inflammatory absorption reactions, and allows cells to migrate and tissues to grow inward.
[0054] In this embodiment, the pore size of the microporous structure 5 is 10 microns to 40 microns; preferably, 10 microns to 35 microns; more preferably, 10 microns to 30 microns; more preferably, 10 microns to 25 microns; more preferably, 10 microns to 20 microns; more preferably, 10 microns to 19 microns; more preferably, 10 microns to 18 microns; more preferably, 10 microns to 17 microns; more preferably, 10 microns to 16 microns; more preferably, 10 microns to 15 microns; more preferably, 10 microns to 14 microns.
[0055] It should be noted that the pore size of the microporous structure 5 is adaptively set to match the size of tissue cells, so that the tissue cells can be better induced into the microporous structure 5, thereby better achieving the fusion of tissue cells and the prosthesis body.
[0056] In this embodiment, the porosity of the prosthesis body is 75% to 80%; preferably, 76% to 80%; preferably, 77% to 80%; preferably, 78% to 80%; preferably, 78% to 79%; preferably, 79% to 80%.
[0057] In this embodiment, the orthographic projection of the bottom surface 1 includes a first straight edge 11, a first arc edge 12, a second straight edge 13, and a second arc edge 14. The first straight edge 11, the first arc edge 12, the second straight edge 13, and the second arc edge 14 are connected smoothly from end to end to form a closed loop. The angle between the extension lines of the first straight edge 11 and the second straight edge 13 is greater than or equal to 90°. The length of the first straight edge 11 is greater than the length of the second straight edge 13. The first arc edge 12 and the second arc edge 14 are both circular arcs, and the curvature radius of the first arc edge 12 is smaller than the curvature radius of the second arc edge 14. The second arc edge 14 is concave toward the first arc edge 12. The upper end of the top surface 2 also includes a plane, which includes a smoothly connected third arc edge 21 and a fourth arc edge 22. The third arc edge 21 is closer to the first arc edge 12 than the fourth arc edge 22. The curvature radius of the third arc edge 21 is smaller than the curvature radius of the fourth arc edge 22. The fourth arc edge 22 is concave toward the third arc edge 21.
[0058] In this embodiment, the first straight side 11 and the second straight side 13 are both tangent to the first arc side 12, and the sum of the length of the first straight side 11 and the radius of curvature of the first arc side 12 is a=80 mm, or the sum of the length of the first straight side 11 and the radius of curvature of the first arc side 12 is a=60 mm, or the sum of the length of the first straight side 11 and the radius of curvature of the first arc side 12 is a=40 mm, or the sum of the length of the first straight side 11 and the radius of curvature of the first arc side 12 is a=25 mm;
[0059] The sum of the curvature radii of the second straight side 13 and the first arc side 12 is b=60 mm, or the sum of the curvature radii of the second straight side 13 and the first arc side 12 is b=40 mm, or the sum of the curvature radii of the second straight side 13 and the first arc side 12 is b=20 mm;
[0060] The curvature radius R1 of the first arc edge 12 is 50 mm, or the curvature radius R1 of the first arc edge 12 is 40 mm, or the curvature radius R1 of the first arc edge 12 is 30 mm;
[0061] The radius of curvature R2 of the second arc edge 14 is 200 mm, or the radius of curvature R2 of the second arc edge 14 is 190 mm, or the radius of curvature R2 of the second arc edge 14 is 180 mm, or the radius of curvature R2 of the second arc edge 14 is 170 mm, or the radius of curvature R2 of the second arc edge 14 is 160 mm, or the radius of curvature R2 of the second arc edge 14 is 150 mm, or the radius of curvature R2 of the second arc edge 14 is 140 mm, or the radius of curvature R2 of the second arc edge 14 is 130 mm, or the radius of curvature R2 of the second arc edge 14 is 120 mm, or the radius of curvature R2 of the second arc edge 14 is 110 mm, or the radius of curvature R2 of the second arc edge 14 is 100 mm;
[0062] The top surface 2 also includes a plane at the upper end, the plane includes a smoothly connected third arc edge 21 and a fourth arc edge 22, the third arc edge 21 is closer to the first arc edge 12 than the fourth arc edge 22, the curvature radius of the third arc edge 21 is smaller than the curvature radius of the fourth arc edge 22, and the fourth arc edge 22 is concave toward the third arc edge 21. The vertical distance c between the plane where the third arc edge and the fourth arc edge are located and the point on the bottom surface closest to the plane is 6.5mm, or c=6mm, or c=5.5mm, or c=5mm, or c=4.5mm, or c=4mm between the bottom surface 1 and the top surface 2, or c=3.5mm, or c=3mm, or c=2.5mm, or c=2mm.
[0063] It should be noted that the longitudinal distance c between the plane where the third arc edge and the fourth arc edge are located and the highest point of the bottom surface 1 can be adjusted according to the needs of people of different age groups for brow arch prosthesis.
[0064] In this embodiment, the prosthesis body does not contain any adhesive.
[0065] In another embodiment, the prosthesis body contains a binder 4, and the binder 4 is polytetrafluoroethylene propylene.
[0066] Example 2
[0067] See also Figure 1-Figure 6As shown, the present embodiment provides a brow arch prosthesis, which has two prosthesis bodies that are mirror-symmetrical; each of the prosthesis bodies has a bottom surface 1 and a top surface 2, and there is a smooth transition between the bottom surface 1 and the top surface 2; the bottom surface 1 is a plane, which can be deformed into a curved surface that matches the shape of the bones at the brow arch of the human body when an external force is applied to the prosthesis body; the orthographic projection of the top surface 2 on the bottom surface is located within the contour line of the bottom surface, and the top surface gradually narrows toward the two side ends; the prosthesis body is laminated by multiple layers of sheet-like expanded material, and each layer of the expanded material is distributed with a microporous structure for the growth of tissue cells.
[0068] In this embodiment, the sheet-like expanded material is a sheet-like expanded polytetrafluoroethylene.
[0069] In this embodiment, the pore size of the microporous structure 5 is 10 microns to 40 microns; preferably, 10 microns to 35 microns; more preferably, 10 microns to 30 microns; more preferably, 10 microns to 25 microns; more preferably, 10 microns to 20 microns; more preferably, 10 microns to 19 microns; more preferably, 10 microns to 18 microns; more preferably, 10 microns to 17 microns; more preferably, 10 microns to 16 microns; more preferably, 10 microns to 15 microns; more preferably, 10 microns to 14 microns.
[0070] In this embodiment, the porosity of the prosthesis body is 75% to 80%; preferably, 76% to 80%; preferably, 77% to 80%; preferably, 78% to 80%; preferably, 78% to 79%; preferably, 79% to 80%.
[0071] In this embodiment, the orthographic projection of the bottom surface 1 includes a first straight edge 11, a first arc edge 12, a second straight edge 13, and a second arc edge 14. The first straight edge 11, the first arc edge 12, the second straight edge 13, and the second arc edge 14 are connected smoothly from end to end to form a closed loop. The angle between the extension lines of the first straight edge 11 and the second straight edge 13 is greater than or equal to 90°. The length of the first straight edge 11 is greater than the length of the second straight edge 13. The first arc edge 12 and the second arc edge 14 are both circular arcs, and the curvature radius of the first arc edge 12 is smaller than the curvature radius of the second arc edge 14. The second arc edge 14 is concave toward the first arc edge 12. The upper end of the top surface 2 also includes a plane, which includes a smoothly connected third arc edge 21 and a fourth arc edge 22. The third arc edge 21 is closer to the first arc edge 12 than the fourth arc edge 22. The curvature radius of the third arc edge 21 is smaller than the curvature radius of the fourth arc edge 22. The fourth arc edge 22 is concave toward the third arc edge 21.
[0072] In this embodiment, the first straight side 11 and the second straight side 13 are both tangent to the first arc side 12, and the sum of the length of the first straight side 11 and the radius of curvature of the first arc side 12 is a=80 mm, or the sum of the length of the first straight side 11 and the radius of curvature of the first arc side 12 is a=60 mm, or the sum of the length of the first straight side 11 and the radius of curvature of the first arc side 12 is a=40 mm, or the sum of the length of the first straight side 11 and the radius of curvature of the first arc side 12 is a=25 mm;
[0073] The sum of the curvature radii of the second straight side 13 and the first arc side 12 is b=60 mm, or the sum of the curvature radii of the second straight side 13 and the first arc side 12 is b=40 mm, or the sum of the curvature radii of the second straight side 13 and the first arc side 12 is b=20 mm;
[0074] The curvature radius R1 of the first arc edge 12 is 50 mm, or the curvature radius R1 of the first arc edge 12 is 40 mm, or the curvature radius R1 of the first arc edge 12 is 30 mm;
[0075] The radius of curvature R2 of the second arc edge 14 is 200 mm, or the radius of curvature R2 of the second arc edge 14 is 190 mm, or the radius of curvature R2 of the second arc edge 14 is 180 mm, or the radius of curvature R2 of the second arc edge 14 is 170 mm, or the radius of curvature R2 of the second arc edge 14 is 160 mm, or the radius of curvature R2 of the second arc edge 14 is 150 mm, or the radius of curvature R2 of the second arc edge 14 is 140 mm, or the radius of curvature R2 of the second arc edge 14 is 130 mm, or the radius of curvature R2 of the second arc edge 14 is 120 mm, or the radius of curvature R2 of the second arc edge 14 is 110 mm, or the radius of curvature R2 of the second arc edge 14 is 100 mm;
[0076] The top surface 2 also includes a plane at the upper end, the plane includes a smoothly connected third arc edge 21 and a fourth arc edge 22, the third arc edge 21 is closer to the first arc edge 12 than the fourth arc edge 22, the curvature radius of the third arc edge 21 is smaller than the curvature radius of the fourth arc edge 22, and the fourth arc edge 22 is concave toward the third arc edge 21. The vertical distance c between the plane where the third arc edge and the fourth arc edge are located and the point on the bottom surface closest to the plane is 6.5mm, or c=6mm, or c=5.5mm, or c=5mm, or c=4.5mm, or c=4mm between the bottom surface 1 and the top surface 2, or c=3.5mm, or c=3mm, or c=2.5mm, or c=2mm.
[0077] It should be noted that the vertical distance c between the plane where the third arc edge and the fourth arc edge are located and the point on the bottom surface closest to the plane can be adjusted according to the needs of people of different age groups for brow arch prostheses.
[0078] In this embodiment, the prosthesis body does not contain any adhesive.
[0079] In another embodiment, the prosthesis body contains a binder 4, and the binder 4 is polytetrafluoroethylene propylene.
[0080] Example 3
[0081] This embodiment provides another method for making a brow arch prosthesis, which comprises the following steps:
[0082] (1) Mixing: Using polytetrafluoroethylene dispersion resin as raw material, mixing with solvent oil in a weight ratio of (10:1 to 20:1); the weight average molecular weight of the selected polytetrafluoroethylene resin is in the range of 3,500,000 to 8,500,000, and the solvent oil is preferably dearomatic solvent oil; after the polytetrafluoroethylene dispersion resin and the solvent oil are fully mixed, sieving can be adopted to remove particles with larger particle size;
[0083] (2) Preforming: The main function of this step is to solidify the above mixture from a fluid state to prepare for the next processing process; the shape formed can be a cuboid, a cube, a cone or other geometric shapes, preferably a cylinder;
[0084] (3) Plunger extrusion: forming the solid mixture into a film or sheet by extrusion at a temperature of 25 to 38° C. to obtain a film or sheet with a thickness of 0.8 to 2 mm;
[0085] (4) Drying, stretching, sintering, and shaping: The film or sheet obtained above is dried to remove the solvent oil, and then stretched at a temperature of 180° C. to 300° C. to obtain expanded polytetrafluoroethylene, and high-temperature lamination is performed according to the required thickness to obtain an expanded polytetrafluoroethylene sheet 3 of the required thickness;
[0086] If necessary, drying and stretching can also be performed simultaneously, and deoiling and stretching can be performed simultaneously by means of a traction roller, and the stretched expanded polytetrafluoroethylene sheet 3 is obtained, and then the expanded polytetrafluoroethylene sheet 3 is stacked to obtain a sheet blank; during the stacking process, one or more compounds can be used as a binder, and high melting point fluoropolymers similar to polytetrafluoroethylene, such as polyperfluoroethylene propylene (FEP for short) are preferably considered;
[0087] (5) Cutting and carving: Carving is performed on the plate blank obtained above to obtain a molded expanded polytetrafluoroethylene brow arch prosthesis.
[0088] The brow arch prosthesis is made of polytetrafluoroethylene, which has good biocompatibility and high safety. The microporous 5 structure on it can induce tissue cells to grow in, realize the fusion of tissue cells and prosthesis, play a role in fixing the prosthesis, thereby preventing the prosthesis from falling, and can effectively avoid the formation of fibrous capsules. In addition, the brow arch prosthesis has been prefabricated before the operation, which reduces the time for doctors to carve the prosthesis during the operation, reduces the risk of prosthesis contamination, and thus reduces the risk of postoperative infection.
[0089] The eyebrow arch prosthesis of the utility model adopts non-degradable material and can be used for life after being implanted once; the material has excellent biocompatibility, and the prosthesis has a physiological structure that simulates the human eyebrow bone and has better fit.
[0090] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.
[0091] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.
Claims
1. A brow arch prosthesis, characterized in that: include: Two prosthesis bodies with mirror symmetry; Each of the prosthesis bodies has a bottom surface and a top surface, and the bottom surface and the top surface have a smooth transition; The bottom surface is a curved surface that is concave toward 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 orthographic projection of the top surface on the bottom surface is located within the contour line of the bottom surface, and the top surface gradually narrows toward both side ends; The prosthesis body is made of multiple layers of sheet-like expanded material laminated together, and each layer of the expanded material is distributed with a microporous structure for tissue cell growth.
2. A brow arch prosthesis, characterized in that: include: Two prosthesis bodies with mirror symmetry; Each of the prosthesis bodies has a bottom surface and a top surface, and the bottom surface and the top surface have a smooth transition; The bottom surface is a plane, and the plane can be deformed into a curved surface matching the shape of the bone at the brow arch of the human body under the condition that an external force is applied to the prosthesis body; The orthographic projection of the top surface on the bottom surface is located within the contour line of the bottom surface, and the top surface gradually narrows toward both side ends; The prosthesis body is made of multiple layers of sheet-like expanded material laminated together, and each layer of the expanded material is distributed with a microporous structure for tissue cell growth.
3. The brow arch prosthesis according to claim 1 or 2, characterized in that: The sheet-like expanded material is sheet-like expanded polytetrafluoroethylene.
4. The eyebrow arch prosthesis according to claim 3, characterized in that: The weight average molecular weight of the expanded polytetrafluoroethylene ranges from 3,500,000 to 8,500,000.
5. The brow arch prosthesis according to claim 1 or 2, characterized in that: The pore size of the microporous structure is 10 micrometers to 40 micrometers.
6. The eyebrow arch prosthesis according to claim 4, characterized in that: The porosity of the prosthesis body is 40% to 80%.
7. The brow arch prosthesis according to claim 6, characterized in that: The sheet-like expanded polytetrafluoroethylene is composed of one or more layers of raw material sheets with a thickness of 0.8 mm to 2 mm.
8. The brow arch prosthesis according to claim 7, characterized in that: The orthographic projection of the bottom surface includes a first straight side, a first arc side, a second straight side and a second arc side. The first straight side, the first arc side, the second straight side and the second arc side are smoothly connected end to end to form a closed loop. The angle between the extension line of the first straight side and the second straight side is greater than or equal to 90°. The length of the first straight side is greater than the length of the second straight side. The first arc side and the second arc side are both circular arcs, and the curvature radius of the first arc side is smaller than the curvature radius of the second arc side. The second arc side is concave toward the first arc side.
9. The brow arch prosthesis according to claim 8, characterized in that: The upper end of the top surface also includes a plane, which includes a third arc edge and a fourth arc edge that are smoothly connected. The third arc edge is closer to the first arc edge than the fourth arc edge. The curvature radius of the third arc edge is smaller than the curvature radius of the fourth arc edge, and the fourth arc edge is concave toward the third arc edge.
10. The brow arch prosthesis according to claim 9, characterized in that: The first straight side and the second straight side are both tangent to the first arc side, the sum of the length of the first straight side and the curvature radius of the first arc side is 25mm to 80mm, the sum of the length of the second straight side and the curvature radius of the first arc side is 20mm to 60mm, and the curvature radius of the first arc side is 0mm to 50mm.
11. The brow arch prosthesis according to claim 10, characterized in that: The curvature radius of the second arc edge is 20 mm to 200 mm.
12. The brow arch prosthesis according to claim 11, characterized in that: The vertical distance between the plane where the third arc edge and the fourth arc edge are located and the point on the bottom surface closest to the plane is 2 mm to 6.5 mm.
13. The brow arch prosthesis according to claim 12, characterized in that: In the orthographic projection of the bottom surface, the minimum distance between the second arc edge and the first straight edge ranges from 0 mm to 30 mm.
14. The brow arch prosthesis according to claim 1 or 2, characterized in that: The prosthesis body does not contain any adhesive.
15. The brow arch prosthesis according to claim 1 or 2, characterized in that: The sheet-like expanded material layers contain a binder, and the binder is polyperfluoroethylene propylene.