Metal oral membrane and preparation device thereof
By combining an asymmetric through-hole design with a fabrication device on a metal oral diaphragm, the problems of burn marks and burrs during processing were solved, the tensile strength and durability of the diaphragm were improved, the risk of fracture was reduced, and efficient bone tissue repair support was achieved.
Patent Information
- Application Number
- CN202422723853.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-08
AI Technical Summary
Existing metal dental membranes are prone to burn marks and burrs at the edges of holes during processing, and have poor hardness, making them easy to break in clinical applications.
By employing an asymmetric through-hole design and fabrication device, and through the combined use of a hollow needle tube and a cutting blade, the physical punching and cutting of metal oral diaphragms are integrated, reducing the risk of breakage.
It improves the tensile strength and durability of metal dental membranes, reduces burrs at the edges of through-holes, lowers the possibility of breakage, and enhances stability in dental applications.
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Figure CN223453335U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of oral implants, in particular to a metal oral membrane and a preparation device thereof. BACKGROUND
[0002] Dental implant technology has become a routine repair treatment method for tooth loss. Clinically, it is often unavoidable to cause absorption changes of alveolar bone due to periodontitis, tooth loss and trauma, etc. For example, the alveolar ridge is too low, too narrow, and there are local concave bone defects, etc. These bone defect problems are easy to lead to implant failure or poor effect. In 1976, Melcher first discovered and proposed the guided tissue regeneration treatment method in the treatment of periodontal disease. It is found that the guided tissue regeneration can effectively improve the alveolar bone mass and promote the regeneration of periodontal attachment. Subsequently, more and more studies have shown that the introduction of biological barrier membrane materials in the guided tissue regeneration treatment of periodontal disease can effectively prevent fibroblasts from surrounding soft tissues, so that the osteoblasts on the bone surface can have enough time to proliferate and then reconstruct the bone tissue.
[0003] At present, the commonly used biological barrier membrane materials include synthetic polymers, natural polymers, metals and inorganic compounds. Among them, magnesium and its alloys as a light weight, high biocompatibility metal material have been widely concerned in the biomedical field due to the following properties: (1) good biocompatibility; (2) completely degradable; (3) suitable mechanical properties, the density of magnesium alloy is consistent with human bone, the elastic modulus is closest to natural bone, and the specific strength is higher than titanium; (4) good formability of magnesium alloy.
[0004] However, the current metal oral membrane (such as magnesium metal oral membrane) is generally processed by a femtosecond laser lathe to open micro-holes penetrating the metal membrane on the metal membrane, and the micro-holes are arrayed on the metal membrane. Due to the fact that the laser cutting part is easy to form serious burning marks, the burning of the holes and the burr at the edge of the holes become a problem in the post-processing process, and the metal guided bone regeneration membrane prepared therefrom has poor hardness, which is prone to breakage in clinical practice. Practical new type content
[0005] In order to improve the hardness of the metal guided bone regeneration membrane, the present application provides a metal oral membrane and a preparation device thereof.
[0006] The metal oral membrane and the preparation device thereof provided by the present application adopt the following technical solutions:
[0007] In a first aspect, the application discloses a metal oral film, which is provided with a first through hole, a second through hole and a third through hole penetrating the wall thickness of the film, the first through hole is located at the center of the film, the second through holes are multiple and sequentially located at the vertices of a regular N-polygon, the center of the regular N-polygon is coincident with the center of the film, the third through holes are multiple, the centers of the third through holes are N arcs as a whole, each arc takes a single second through hole as a starting point and radiates to the periphery of the film, and N is an integer of 5-9.
[0008] Optionally, when N is 8, the straight-line distance between the first through hole and the second through hole is 2 mm, and the straight-line distance between the second through hole and the third through hole is 2 mm.
[0009] Optionally, the film is provided with a mounting hole penetrating the thickness at the corner.
[0010] Optionally, the four corners of the film are chamfered.
[0011] In a second aspect, the application discloses a preparation device of a metal oral film, which comprises a support, an upper die, a lower die and a driving piece, the lower die is fixedly connected with the support, the upper die is located above the lower die and is vertically slidably connected with the support, the fixed part of the driving piece is fixedly connected with the support, and the movable part of the driving piece is used for driving the upper die to vertically move, one side of the upper die close to the lower die is connected with a hollow needle tube, the lower die is used for placing a metal oral film, and the hollow needle tube is used for punching holes in the metal oral film.
[0012] Optionally, the upper die is connected with a cutting knife, and the cutting knife is arranged around the hollow needle tube.
[0013] Optionally, the top wall of the lower die is provided with a pushing groove, and the side wall of the lower die is provided with a discharging groove, and the discharging groove is in communication with the pushing groove.
[0014] Optionally, the hollow needle tube comprises a first needle tube, a plurality of second needle tubes and a plurality of third needle tubes, the first needle tube is located at the center, the second needle tubes are sequentially located at the vertices of a regular N-polygon, the center of the regular N-polygon is coincident with the center where the first needle tube is located, the third needle tubes are multiple, the positions where the third needle tubes are located are N arcs as a whole, each arc takes a single second needle tube as a starting point and radiates to the periphery of the upper die, and N is an integer of 5-9.
[0015] Optionally, the hollow needle tube further comprises a fourth needle tube, the fourth needle tube is located at the periphery of the third needle tube, and the fourth needle tube is used for forming a mounting hole at the corner of the metal oral film.
[0016] Optionally, the upper die is an inverted trapezoidal table, the top wall of the lower die is fixedly connected with a positioning block, the positioning block is a right triangular prism, one right angle surface of the positioning block is attached to the lower die, and the inclined surface of the positioning block is attached to the inclined surface of the upper die.
[0017] To sum up, the present application includes at least one of the following beneficial technical effects:
[0018] 1. By setting the distribution mode of through holes on the metal oral film, the metal oral film is asymmetric, which can effectively reduce the possibility of breaking and other adverse events of the metal oral film in actual use.
[0019] 2. The physical punching of the metal oral film by the preparation device in the present application can effectively reduce the burr phenomenon of the through hole edge, and the punching and cutting integration is realized in the preparation process of the metal oral film, which is very convenient. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows.
[0021] Figure 1 is a structural schematic diagram of a metal oral film according to an embodiment of the present application;
[0022] Figure 2 is a structural schematic diagram of a metal oral film with array distributed through holes;
[0023] Figure 3 is a structural schematic diagram of a metal oral film preparation device according to an embodiment of the present application;
[0024] Figure 4 is a schematic diagram of the distribution position of the hollow needle tube in the upper die in the metal oral film preparation device according to the present application;
[0025] Figure 5 is a preparation process schematic diagram of a metal oral film according to an embodiment of the present application.
[0026] The drawings are as follows: 1, first through hole; 2, second through hole; 3, third through hole; 4, mounting hole; 5, bracket; 6, upper die; 7, lower die; 71, pushing groove; 72, discharging groove; 73, positioning block; 8, driving member; 9, hollow needle tube; 91, first needle tube; 92, second needle tube; 93, third needle tube; 94, fourth needle tube; 10, cutting knife; 100, metal sheet; 200, preparation device; 300, metal oral film. DETAILED DESCRIPTION
[0027] The present application will be further described in detail as follows. Figures 1-5 The present application will be further described in detail as follows.
[0028] Firstly, the metal oral film sheet is disclosed in the embodiments of the present application. Referring to Figure 1 The metal oral film sheet is provided with a first through hole 1, a second through hole 2 and a third through hole 3 penetrating the wall thickness of the film sheet, the first through hole 1 is located at the center of the film sheet, the second through hole 2 is multiple and sequentially located at the vertices of a regular N-polygon, the center of the regular N-polygon coincides with the center of the film sheet, the third through hole 3 is multiple, the centers of the third through holes 3 form N arcs as a whole, each arc starts from a single second through hole 2 and radiates to the periphery of the film sheet, and N is an integer of 5-9. The centers of each circle of the third through holes 3 form a concentric circle.
[0029] It should be noted that the metal oral film sheet in the present application can be composed of magnesium metal, titanium metal or other metals or alloys with good biocompatibility. In the specific embodiments of the present application, the metal oral film sheet is an oral film sheet with a magnesium content of 99.99%. The shape of the metal oral film sheet can be square, rectangular, circular or any other shape that can effectively fit the periodontal area of the oral cavity, and the shape of the metal oral film sheet is not specifically limited here. For example, the metal oral film sheet can be a rectangular film sheet with a length of 20-50 mm, a width of 10-40 mm and a thickness of 0.2-0.3 mm, and in some embodiments, the four corners of the rectangular metal oral film sheet are chamfered. In addition, the first through hole 1, the second through hole 2 and the third through hole 3 can all be circular holes or square holes. In some embodiments, the area ratio of the first through hole 1, the second through hole 2 and the third through hole 3 to the surface area of the metal oral film sheet is 18%-32%.
[0030] It can be understood that, in order to enhance the durability of the metal oral film sheet, a plating layer can be attached to the outer surface of the metal oral film sheet by electrochemical deposition, and the first through hole 1, the second through hole 2 and the third through hole 3 all penetrate the plating layer.
[0031] By arranging the positions of the first through hole 1, the second through hole 2 and the third through hole 3 on the metal oral film sheet in a non-array form, the metal oral film sheet can be made non-symmetrical. Experiments have shown that the non-symmetrical metal oral film sheet not only meets the normal requirements for promoting bone tissue repair, but also is less likely to break during use, thereby being able to play a long-term and efficient role.
[0032] It should be noted that, in order to facilitate punching and make the punched metal oral film sheet more beautiful, the curvature of each arc formed by the third through hole 3 is consistent, and each arc can pass through the first through hole.
[0033] As an example, the metal oral patch is a rectangular patch with a length of 30 mm, a width of 20 mm, and a thickness of 0.2 mm. When N is 8, the linear distance between the first through hole 1 and the second through hole 2 is 2 mm, the linear distance between the second through hole 2 and the third through hole 3 is 2 mm, and the first through hole 1, the second through hole 2 and the third through hole 3 are all circular holes with a hole diameter of 2 mm. At this time, the area ratio of the first through hole 1, the second through hole 2 and the third through hole 3 to the upper surface area of the metal oral patch is 30%, which is helpful to provide sufficient blood supply on the basis of not being easy to break during use.
[0034] In order to facilitate the convenient use of the metal oral patch, in some embodiments, as shown in Figure 1 The metal oral patch has a mounting hole 4 passing through its thickness at the corner, and the hole diameter of the mounting hole 4 can be 2-5 mm. As an example, the hole diameter of the mounting hole 4 is 3 mm. It is convenient to fix the metal oral patch through the mounting hole 4 when using the metal oral patch.
[0035] Figure 2 For the metal oral patch with array distribution of through holes (as a comparative example), it should be noted that, Figure 2 The metal oral patch shown in is also made by physically punching the magnesium sheet by a punch, Figure 2 The size of the metal oral patch shown in is the same as Figure 1 The size of the metal oral patch shown in is the same as Figure 2 The area ratio of the through holes in the metal oral patch shown in is the same as Figure 1 The metal oral patch shown in. Referring to the test method in the national standard "GB / T10423-2002 Determination of tensile strength of sintered metal friction materials", the longitudinal tensile strength and transverse tensile strength of Figure 1 (as an example) and Figure 2 The metal oral patch shown in are obtained, and the corresponding experimental data are listed in Table 1. As can be seen from the data in Table 1, the longitudinal tensile strength and transverse tensile strength of the metal oral patch prepared by the present application are increased, which is not easy to break in actual use, and is helpful to make the metal oral patch play a lasting role.
[0036] Table 1. Longitudinal tensile strength and transverse tensile strength of examples and comparative examples
[0037] Item Tensile strength in the longitudinal direction (MPa) Tensile strength in the transverse direction (MPa) Embodiments Figure 1 ) 196.22 170.96 Comparative Example Figure 2 ) 104.13 97.99
[0038] Correspondingly, in another aspect, the present application also discloses a preparation device of a metal oral patch. As shown in Figure 3As shown in the figure, the preparation device of the metal oral film includes a bracket 5, an upper mold 6, a lower mold 7, and a driving member 8. The lower mold 7 is fixedly connected with the bracket 5 by bolts. The upper mold 6 is located above the lower mold 7 and is vertically slidably connected with the bracket 5. The fixed part of the driving member 8 is fixedly connected with the bracket 5, and the movable part of the driving member 8 is fixedly connected with the upper mold 6 by bolts and is used to drive the vertical movement of the upper mold 6. The side of the upper mold 6 close to the lower mold 7 is fixedly connected with a hollow needle tube 9. The lower mold 7 is used to place the metal oral film, and the hollow needle tube 9 is used to punch holes in the metal oral film.
[0039] It can be understood that the upper mold 6 and the lower mold 7 can all be metal blocks made of stainless steel, aluminum material, magnesium aluminum steel, etc. For example, Figure 4 As shown in the figure, the hollow needle tube 9 includes a first needle tube 91, a plurality of second needle tubes 92, and a plurality of third needle tubes 93. The first needle tube 91 is located at the center. The second needle tubes 92 are located at the vertices of a regular N-polygon in sequence, and the center of the regular N-polygon coincides with the center where the first needle tube 91 is located. The third needle tubes 93 are located at positions that form N arcs as a whole. Each arc starts from a single second needle tube 92 and radiates to the periphery of the upper mold 6. N is an integer between 5 and 9. In some embodiments, each arc can pass through the center where the first needle tube 91 is located. The centers of each circle of third needle tubes 93 can form concentric circles.
[0040] In other embodiments, in combination with Figure 1 and Figure 4 As shown in the figure, the hollow needle tube 9 further includes a fourth needle tube 94. The fourth needle tube 94 is located at the periphery of the third needle tube 93, and is used to form mounting holes 4 at the corners of the metal oral film.
[0041] In some embodiments, the inner diameter of all the hollow needle tubes 9 can be 0.3-2.5 mm, the height can be 5-10 mm, and the straight-line distance between adjacent hollow needle tubes 9 can be 0.5-2 mm. As an example, when N is 8, the inner diameter of the hollow needle tube 9 is 2 mm, the height is 6 mm, and the straight-line distance between adjacent hollow needle tubes 9 is 2 mm.
[0042] It should be noted that the driving member 8 can be any mechanism that can drive the vertical movement of the upper mold 6, such as a pneumatic cylinder. The driving member 8 in this application is a punch, which can fill the hollow needle tube 9 with pressurized gas.
[0043] In order to make the preparation device of the metal oral film more accurate during operation, for example, Figure 3As shown, the upper die 6 is an inverted trapezoidal table, and the top wall of the lower die 7 is integrally connected with a positioning block 73, the positioning block 73 is a right triangular prism, and one right angle surface of the positioning block 73 is attached to and integrally connected with the top wall of the lower die 7, and the inclined surface of the positioning block 73 can be attached to the inclined surface of the upper die 6. At this time, the upper die 6 can be positioned and limited, which helps to make the displacement of the hollow needle tube 9 fixed each time.
[0044] As shown in Figure 3 and Figure 4 , the upper die 6 is also fixedly connected with a cutting knife 10, the cutting knife 10 is arranged around the outer periphery of the fourth needle tube 94, the thickness of the cutting knife 10 can be 0.3mm-1.0mm, and the height of the cutting knife 10 is consistent with the height of the hollow needle tube 9. When the upper die 6 moves vertically downward to punch the metal oral film, the cutting knife 10 can cut the metal oral film to make the size of the metal oral film appropriate. The setting of the cutting knife 10 can realize the punching and cutting of the metal oral film at the same time, greatly improving the efficiency of preparing the metal oral film, and also improving the applicability of the metal oral film preparation device.
[0045] As shown in Figure 3 , the top wall of the lower die 7 is provided with a pushing groove 71 Figure 3 indicated by the dashed line), and one side wall of the lower die 7 is provided with a discharging groove 72, which is in communication with the pushing groove 71. The width and height of the discharging groove 72 and the pushing groove 71 can be reasonably set according to the actual application scene, and the present application does not make specific limitations on the width and height of the discharging groove 72 and the pushing groove 71. For example, the width of the pushing groove 71 can be 1mm-5mm, and the height can be 10-15mm; the width of the discharging groove 72 can be 2mm-4mm, and the height can be 4mm-6mm.
[0046] It should be further pointed out that the present application does not make specific limitations on the position and number of the pushing groove 71, and as an example, the pushing groove 71 can be symmetrically provided as two, as shown in Figure 3 It can be understood that, in order to avoid the phenomenon of bending of the metal oral film due to sudden force concentration during the preparation of the metal oral film, the position of the pushing groove 71 on the lower die 7 can be located outside the cutting knife 10.
[0047] When it is necessary to clean the waste, the metal oral film with holes is taken away, and then the debris on the surface of the lower die 7 is swept into the pushing groove 71 by the cleaning brush, and then the debris in the discharging groove 72 is swept out by the cleaning brush.
[0048] In combination with Figures 1-5 , the preparation process of one embodiment of the present application is as follows:
[0049] Step 1: extruding high-purity magnesium raw material at a temperature of 300℃ and an extrusion speed of 10mm / s to obtain a magnesium metal plate with a thickness of 3mm; then hot-rolling the magnesium metal plate 3-4 times at a temperature of 280℃ to obtain a magnesium metal sheet 100 with a thickness of 0.25mm, and the magnesium content in the magnesium metal sheet 100 is 99.99%. In each rolling, the reduction is controlled within 20% of the current thickness of the magnesium metal plate.
[0050] Step 2: placing the magnesium metal sheet 100 at the target position of the lower die 7 of the preparation device 200, starting the driving member 8 to vertically move the upper die 6 towards the lower die 7, in the process, the hollow needle tube 9 punches the magnesium metal sheet 100, and the cutting knife 10 cuts the magnesium metal sheet 100; then the driving member 8 drives the upper die 6 to vertically move back to the position away from the lower die 7, and obtains a primary processed film.
[0051] Step 3: taking the primary processed film out of the preparation device 200, placing it in a high-precision polisher to polish both sides, and chamfering the corners of the primary processed film to obtain a metal oral film 300. The prepared metal oral film 300 can be vacuum packaged, and then irradiated at an irradiation intensity of 25kGy for sterilization.
[0052] Step 4: using a cleaning brush to sweep the debris on the surface of the lower die 7 into the pushing groove 71, and then using a cleaning brush to sweep the debris in the discharging groove 72 out for next use.
[0053] The preparation device 200 of the metal oral film in the present application realizes the integration of physical punching and cutting of the metal oral film 300, and significantly improves the burr phenomenon of the through hole edge; the through hole of the prepared metal oral film 300 is not arranged in an array, and the metal oral film 300 is no longer symmetrical, which effectively reduces the possibility of adverse events such as breakage during use of the metal oral film 300.
[0054] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the basis of the structure, shape, principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A metallic oral film, characterized in that: The diaphragm is provided with a first through hole, a second through hole and a third through hole penetrating the wall thickness of the diaphragm, the first through hole is located at the center of the diaphragm, the second through hole is multiple and sequentially located at the vertices of a regular N-polygon, the center of the regular N-polygon coincides with the center of the diaphragm, the third through hole is multiple, the center of the third through hole is N arc shapes as a whole, each arc shape takes a single second through hole as a starting point and radiates to the periphery of the diaphragm, and N is an integer of 5-9.
2. A metal oral patch according to claim 1, characterized in that: When N is 8, the straight line distance between the first through hole and the second through hole is 2mm, and the straight line distance between the second through hole and the third through hole is 2mm.
3. A metal oral patch according to claim 1, wherein: The diaphragm is provided with a mounting hole penetrating the thickness thereof at the corner of the diaphragm.
4. A metal oral patch according to claim 1, wherein: The four corners of the diaphragm are chamfered.
5. An apparatus for preparing a metallic oral patch, characterized by: The device comprises a bracket, an upper die, a lower die and a driving member, the lower die is fixedly connected with the bracket, the upper die is located above the lower die and is vertically slidably connected with the bracket, the fixed part of the driving member is fixedly connected with the bracket, and the movable part of the driving member is used for driving the upper die to vertically move, and the side of the upper die close to the lower die is connected with a hollow needle tube, and the lower die is used for placing a metal oral diaphragm.
6. The preparation device according to claim 5, characterized in that: The upper die is connected with a cutting knife, and the cutting knife surrounds the periphery of the hollow needle tube.
7. The preparation device of claim 5, wherein: The top wall of the lower die is provided with a pushing groove, and the side wall of the lower die is provided with a discharging groove, and the discharging groove is in communication with the pushing groove.
8. The preparation device of claim 5, wherein: The hollow needle tube comprises a first needle tube, a second needle tube and a third needle tube, the first needle tube is located at the center, the second needle tube is multiple and sequentially located at the vertices of a regular N-polygon, the center of the regular N-polygon coincides with the center where the first needle tube is located, the third needle tube is multiple, the position where the third needle tube is located is N arc shapes as a whole, each arc shape takes a single second needle tube as a starting point and radiates to the periphery of the upper die, and N is an integer of 5-9.
9. The preparation device of claim 8, wherein: The hollow needle tube further comprises a fourth needle tube, the fourth needle tube is located at the periphery of the third needle tube, and the fourth needle tube is used for opening a mounting hole at the corner of the metal oral diaphragm.
10. The preparation device of claim 5, wherein: The upper die is an inverted trapezoidal table, the top wall of the lower die is fixedly connected with a positioning block, the positioning block is a right triangular prism, one right angle surface of the positioning block is attached to the lower die, and the inclined surface of the positioning block is attached to the inclined surface of the upper die.