Diaphragm for making dental braces, dental braces and method for making dental braces

Abstract

The present invention relates to a diaphragm for making dental braces, a dental brace and a method for making a dental brace. The diaphragm includes a sheet body, and the sheet body includes at least two parts connected in butt joint, and the at least two parts have different hardnesses. The diaphragm provided by the present invention has at least two hardnesses, which can be designed according to the required orthodontic force, and the regions where different hardnesses are located can also be designed according to the actual situation of the teeth, realizing the design of the sheet body parts with corresponding hardnesses for different orthodontic forces. After making a dental brace according to this sheet body, it can provide an appropriate orthodontic force for the corresponding tooth part, thereby improving the correction effect and shortening the orthodontic period.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a diaphragm for making dental braces, a dental brace and a method for making a dental brace. Background Art

[0002] Dental orthodontics, that is, correcting tooth deformities, applies external forces through worn orthodontic appliances to displace teeth so as to achieve the purpose of rearrangement. Traditional orthodontic appliances are metal braces, usually composed of a nickel-titanium alloy arch wire and a metal bracket. Such orthodontic appliances can achieve good treatment effects, but they are not beautiful and comfortable enough, and during the wearing process, the arch wire and the bracket will stimulate the oral cavity, causing a foreign body sensation, and there will be residual debris on the arch wire and the bracket, which is easy to breed bacteria.

[0003] To solve the problems existing in traditional metal braces, invisible braces (also known as invisible orthodontic appliances) came into being. Compared with traditional orthodontic appliances, invisible braces without brackets are safer and more comfortable, will not cut oral tissues due to fixed brackets, will not affect the oral beauty after wearing, can be worn by oneself, and are easy to clean. The material of invisible braces belongs to elastic materials. Its treatment principle is that when wearing invisible braces, the invisible braces undergo a certain elastic deformation, and during the recovery process of this elastic deformation, a force acting on the teeth is generated to push the teeth to move, achieving the purpose of correction. Invisible braces are made of transparent plastic materials, and currently the diaphragm for making invisible braces is a single body with one hardness, so that each part of the invisible braces only has the same orthodontic force. However, the actual situation is that different parts of the teeth require different orthodontic forces, resulting in an unobvious correction effect of the existing invisible braces or a very long orthodontic period. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art, and provide a diaphragm for making dental braces, a dental brace and a method for making a dental brace, so as to solve the problem that the existing invisible braces only have one hardness, resulting in an unobvious correction effect or a very long orthodontic period.

[0005] The technical solution for achieving the above purpose is as follows:

[0006] The present invention provides a diaphragm for making dental braces, including a body, and the body includes at least two parts connected in butt joint, and the at least two parts have different hardnesses.

[0007] The diaphragm provided by the present invention has at least two hardnesses, which can be designed according to the required orthodontic force, and the regions where different hardnesses are located can also be designed according to the actual situation of the teeth, realizing the design of the body parts with corresponding hardnesses for different orthodontic forces. After making a dental brace according to this diaphragm, it can provide appropriate orthodontic force for the corresponding tooth parts, thereby improving the correction effect and shortening the orthodontic period.

[0008] A further improvement of the diaphragm for making dental braces in the present invention lies in that a part of at least two parts is located inside the remaining parts; or

[0009] A part of at least two parts is located at the periphery of the sheet body.

[0010] A further improvement of the diaphragm for making dental braces in the present invention lies in that at least two parts have the same thickness.

[0011] A further improvement of the diaphragm for making dental braces in the present invention lies in that at least two parts are made of different or the same materials.

[0012] A further improvement of the diaphragm for making dental braces in the present invention lies in that the sheet body is a foamed profile with uniformly distributed pores inside, and the pores are non-closed.

[0013] A further improvement of the diaphragm for making dental braces in the present invention lies in that the sheet body includes at least two sheet layers, and the hardness between at least two sheet layers is different.

[0014] The present invention also provides a dental brace made of the above diaphragm.

[0015] The present invention also provides a method for making a dental brace using the diaphragm as described above, including the following steps:

[0016] Prepare a diaphragm according to a tooth correction plan, and the prepared diaphragm includes at least two parts connected by butt joint, and the hardness of at least two parts is different;

[0017] Process the prepared diaphragm to form a dental brace, and at least two parts of the formed dental brace have different hardnesses.

[0018] A further improvement of the method of the present invention lies in that it further includes:

[0019] When making the diaphragm, use the physical gas foaming method to prepare the diaphragm, and the formed diaphragm is a foamed profile with uniformly distributed pores inside;

[0020] Use a needle to pierce into the diaphragm to make the pores inside the diaphragm non-closed;

[0021] After processing to form a dental brace, the non-closed pores can adsorb and store active ingredients.

[0022] A further improvement of the method of the present invention lies in that the step of preparing a diaphragm according to a tooth correction plan includes:

[0023] S11. Divide regions according to a tooth correction plan to form at least two regions, and the hardness required for at least two regions is different;

[0024] S12. Provide a mold, and partition a first model space corresponding to one of the at least two regions in the mold, and form a first part with a corresponding hardness through the first model space;

[0025] S13. Partition a second model space corresponding to the next region of the at least two regions in the mold, and the edge of the second model space is connected to the edge corresponding to the first part. Form a second part with a corresponding hardness through the second model space, and the second part is butted with the first part to form an integral body;

[0026] S14. Repeat step S13 until parts corresponding to each of the at least two regions are formed, and the required diaphragm is obtained. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the first embodiment of the diaphragm for making dental braces of the present invention.

[0028] Figure 2 It is a schematic structural diagram of the second embodiment of the diaphragm for making dental braces of the present invention.

[0029] Figure 3 It is a schematic structural diagram of the third embodiment of the diaphragm for making dental braces of the present invention.

[0030] Figure 4 It is a schematic structural diagram of the fourth embodiment of the diaphragm for making dental braces of the present invention.

[0031] Figure 5 It is a schematic structural diagram of the fifth embodiment of the diaphragm for making dental braces of the present invention.

[0032] Figure 6 It is a schematic structural diagram of the sixth embodiment of the diaphragm for making dental braces of the present invention.

[0033] Figure 7 It is a schematic structural diagram of the dental arch model placement area arranged on the first embodiment of the diaphragm for making dental braces of the present invention.

[0034] Figure 8 It is a schematic structural diagram of the dental arch model placement area arranged on the third embodiment of the diaphragm for making dental braces of the present invention.

[0035] Figure 9 It is a cross-sectional view of the diaphragm for making dental braces of the present invention. Detailed Embodiment

[0036] The present invention will be further described below with reference to the drawings and specific embodiments.

[0037] Refer toFigure 1 , the present invention provides a diaphragm for making dental braces, a dental brace and a method for making a dental brace, which are used to solve the problem that the existing dental braces have only a single hardness and are difficult to meet the requirements of different orthodontic forces for different teeth, resulting in an obvious orthodontic effect or a very long orthodontic period of the existing dental braces. The diaphragm of the present invention includes at least two parts connected in butt joint, and the hardness of the at least two parts is different, so that different orthodontic forces are realized on one dental brace, and then the hardness required in practice can be matched to perform targeted orthodontics on teeth, improve the orthodontic effect and shorten the orthodontic period. The diaphragm for making a dental brace, the dental brace and the method for making a dental brace of the present invention will be described below with reference to the accompanying drawings.

[0038] Refer to Figure 1 , which shows a schematic structural diagram of a first embodiment of the diaphragm for making a dental brace of the present invention. The following will be combined with Figure 1 , to describe the diaphragm for making a dental brace of the present invention.

[0039] As Figure 1 shown, the diaphragm for making a dental brace of the present invention includes a sheet body 20, and the sheet body 20 includes at least two parts connected in butt joint, and the hardness of the at least two parts is different.

[0040] In Figure 1 the shown embodiment, the sheet body 20 includes a first part 21a and a second part 21b, and the first part 21a and the second part 21b are connected into an integral body to form the sheet body 20.

[0041] The sheet body 20 has at least two parts with different hardnesses, and the hardness of the corresponding parts can be adapted to the orthodontic force required for the teeth part, so that targeted orthodontic force can be provided for each tooth, which can improve the orthodontic effect and shorten the orthodontic period.

[0042] In a specific embodiment, at least two parts of the sheet body 20 are made of a thermoplastic material. By using the characteristics of the thermoplastic material to soften when heated and harden when cooled, each part in the at least two parts can be melt-connected into an integral body without butt joints, with good integrity and high firmness. Among them, each part in the at least two parts is formed successively. The previously formed part is placed in the mold of the later formed part, and the later formed part melts the butt joint surface part of the previously formed part in a molten state and then forms an integral body.

[0043] Preferably, the material of the sheet 20 can be selected from one or more of polyurethane, polyethylene terephthalate-1,4-cyclohexanedimethanol ester, and polycarbonate. The polyurethane, polyethylene terephthalate-1,4-cyclohexanedimethanol ester, and polycarbonate among them can be adjusted in formula to obtain the required hardness, and the hardness here is characterized as Shore hardness, with the hardness range between 30D and 90D, and the D type is used for materials with relatively high hardness.

[0044] Furthermore, the materials of at least two parts in the sheet 20 are different, that is, different materials are used to achieve different hardnesses. Or, the materials of at least two parts in the sheet 20 are the same, and different hardnesses are prepared from the same material for the at least two parts.

[0045] Preferably, the material of at least two parts in the sheet 20 can be selected from one of polyurethane, polyethylene terephthalate-1,4-cyclohexanedimethanol ester, and polycarbonate. The materials selected for the at least two parts can be the same or different.

[0046] Still further, each part of the sheet 20 can be formed by injection molding, extrusion molding, or hot pressing.

[0047] In a specific embodiment, the thicknesses of at least two parts of the sheet 20 are consistent, that is, the thickness of the sheet 20 is uniform. Looking at it from the side, the upper surface and the lower surface of the sheet 20 are both flat surfaces. Using a diaphragm with a consistent thickness to make a dental appliance, the thickness of each part of the formed dental appliance is uniform, comfortable to wear, and there is no foreign body sensation in the oral cavity. If the thickness of the dental appliance is relatively thick, it will stimulate the tongue to secrete saliva, thus reducing the comfort level.

[0048] Furthermore, the thickness of the sheet 20 is between 0.1 mm and 3 mm. Usually, the thickness of the processed dental appliance is about 1.00 mm. When the thickness is greater than 1.00 mm, there will be a foreign body sensation when wearing it, and the comfort is poor. Therefore, the thickness of the sheet 20 is preferably between 0.1 mm and 2.00 mm, and the thickness of the sheet 20 is preferably 0.4 mm, 0.67 mm, 0.76 mm, 1.00 mm, 1.5 mm, or 2 mm.

[0049] In a specific embodiment, a part of at least two parts of the sheet 20 is located inside the remaining parts. Therefore, a sheet shape is formed in which a part is surrounded by the remaining parts inside.

[0050] Such as Figure 1As shown, the first embodiment of the diaphragm is shown. In the first embodiment, the first part 21a is disposed on the outer periphery of the second part 21b, and the first part 21a surrounds the second part 21b. The shape of the second part 21b is similar to a horseshoe shape, and the peripheral edge of the second part 21b is arc-shaped, and this arc shape is adapted to the shape of the dental arch model. Combining Figure 7 As shown, the dental arch model setting area 10 is disposed at the junction of the first part 21a and the second part 21b. In this way, the side of the dental appliance close to the lip and the side close to the tongue have different hardnesses, and the teeth can be pushed towards the lip or towards the tongue to achieve the orthodontic function. The diaphragm of this first embodiment can be injection-molded. First, the first part is injection-molded, and then the second part is injection-molded within the first part.

[0051] As Figure 2 shown, the second embodiment of the diaphragm is shown. In the second embodiment, the first part 21a is disposed on the outer periphery of the second part 21b, and both the second part 21b and the first part 21a are circular. If the dental arch model is placed on the diaphragm of this second embodiment, the incisor part and the molar part of the dental appliance can have different hardnesses, and the parts corresponding to the canine teeth and premolars are located at the junction of the first part 21a and the second part 21b. Furthermore, the side of these parts close to the lip and the side close to the tongue have different hardnesses.

[0052] In the first embodiment and the second embodiment, the shape of the second part 21b is circular or similar to a horseshoe shape, but the shape of the second part 21b is not limited thereto. According to the position of the required hardness, the shape of the second part 21b can be adjusted adaptively. It can be a regular geometric shape or an irregular geometric shape.

[0053] In a specific embodiment, at least two parts of the sheet body 20 are partially located at the periphery of the sheet body 20. Therefore, a shape is formed in which each part has an edge located at the edge of the sheet body.

[0054] As Figure 3 shown, the third embodiment of the diaphragm is shown. In the third embodiment, the first part 21a and the second part 21b are provided with arc-shaped docking edges. The first part 21a is crescent-shaped, and the second part 21b is oblate with pointed ends. Combining Figure 8 As shown, the dental arch model setting area 10 is disposed at the junction of the first part 21a and the second part 21b. In this way, the incisor part and the molar part of the dental appliance processed have different hardnesses, and the parts corresponding to the canine teeth and premolars are located at the junction of the first part 21a and the second part 21b. Furthermore, the side of these parts close to the lip and the side close to the tongue have different hardnesses.

[0055] As Figure 4As shown, the fourth embodiment of the diaphragm is shown. In the fourth embodiment, both the first part 21a and the second part 21b are semi-circular, and the first part 21a and the second part 21b are butted to form a sheet body 20 in a circular shape. The diaphragm of this fourth embodiment can be co-extruded by an extrusion process, that is, two extruders are arranged in parallel, and the two materials extruded from the extrusion ports are butted and cooled to form the required sheet material.

[0056] As Figure 5 shown, the fifth embodiment of the diaphragm is shown. In the fifth embodiment, both the first part 21a and the second part 21b are fan-shaped, and the angular radian of the two fans is different, and the sum of the two angular radians is 360°, and the first part 21a and the second part 21b are butted to form a sheet body 20 in a circular shape.

[0057] As Figure 6 shown, the sixth embodiment of the diaphragm is shown. In the sixth embodiment, the sheet body 20 includes three parts, the first part 21a, the second part 21b, and the third part 21c, and the first part 21a, the second part 21b, and the third part 21c trisect a circle.

[0058] It should be noted that the sheet body 20 of the diaphragm in the present invention is transparent, and the filling shown in Figures 1 to 6 is for separating each region.

[0059] In a specific embodiment, the sheet body 20 is a foamed profile with uniformly distributed pores inside. Each part of the sheet body 20 has different hardness by controlling the foaming density. The pores on the surface of the sheet body 20 are made non-closed by acupuncture, so that the pores on the surface have a storage space, and the storage space can be used to adsorb and store active ingredients, so that the processed dental appliance can have corresponding active functions.

[0060] Preferably, when processing a dental appliance using the sheet body 20 with non-closed pores, the non-closed pores are arranged on the inner side of the dental appliance, that is, the side that contacts the teeth when the dental appliance is worn. In this way, the active ingredients stored in the non-closed pores can gradually flow out and adhere to the surface of the teeth, thereby realizing the corresponding functions.

[0061] Furthermore, the active ingredient can be a whitening ingredient, a disinfecting ingredient, a tooth stain removing ingredient, an anti-sensitivity ingredient, a tooth decay preventing ingredient, or other ingredients with pharmacological effects. Furthermore, during the process of orthodontic treatment, functions such as whitening teeth, disinfection, removing tooth stains, resisting tooth sensitivity, preventing tooth decay, or dental health care can be realized.

[0062] Specifically, the active ingredient can be one or more of a mixed solution of 5% potassium nitrate and 1400 ppm sodium fluoride, a 1000 ppm sodium fluoride solution, a mixed solution of 8% strontium acetate and 1000 ppm sodium fluoride, hydrogen peroxide, carbamide peroxide, calcium peroxide, sodium pyrophosphate peroxide, baking soda, chlorine-based bleaching powder, and fluoride. The active ingredient can also be one or more of natural substances such as blue salt, Chinese prickly ash, divaricate saposhnikovia root, dahurian angelica root, and asarum.

[0063] The sheet body of the present invention makes the dental appliance have an adsorption function by designing non-closed pores. The foamed profile also has a certain elasticity, and the hardness it has can be controlled by controlling the foaming density. During the process of orthodontics, by adsorbing active potions with various functions, when worn, the active potion is released from the pores to achieve the corresponding active function on the teeth. Specifically in use, the dental appliance can be soaked in a potion containing the corresponding active ingredient, and the potion will gradually penetrate into the non-closed pores of the dental appliance, and then during the wearing process, the potion will gradually be released onto the teeth, which is simple and convenient to use.

[0064] Furthermore, the sheet body 20 is made by the physical gas foaming method, avoiding the use of chemical foaming agents, making the material safer and more environmentally friendly, and avoiding threats to human health caused by the dental appliance material. Preferably, the sheet body 20 can be prepared by the physical gas foaming method from a polyurethane raw material in the presence of a physical gas foaming agent, and its foaming density is between 0.2 g / cm 3 and 0.6 g / cm 3 . The pores inside the foamed profile formed by foaming are all airtight. After the foamed profile is prepared, the pores are made non-closed by acupuncture, so that it can have the adsorption and storage function.

[0065] In a specific embodiment, as Figure 9 shown, the sheet body 20 includes at least two sheet layers, and the hardness between the at least two sheet layers is different. In the example shown in Figure 9 , the sheet body 20 includes two sheet layers, a first sheet layer 22a and a second sheet layer 22b, and the hardness of the first sheet layer 22a and the second sheet layer 22b is different. Specifically, the first sheet layer 22a and the second sheet layer 22b can have different hardnesses by designing different thicknesses, or by selecting different materials, or by selecting the same material and adjusting the formula. In this embodiment, the sheet body 20 includes at least two parts connected in butt joint, and the overall thickness of the two parts is the same, but the thicknesses of the sheet layers in the two parts are different, and different sheet layer thicknesses are selected to make the hardness of each part different.

[0066] Furthermore, the outer layer of at least two layers is made of a foamed profile, making it have a certain flexibility. This outer layer can be arranged on the upper surface of the sheet body 20 or on the lower surface of the sheet body 20. After being processed into a dental appliance, this flexible layer can be located on the inner side of the dental appliance, that is, the side in contact with the teeth when worn, or on the outer side of the dental appliance, that is, the side not in contact with the teeth when worn. The soft layer improves the wearing comfort, and the flexible layer can provide a certain buffering effect for the dental appliance, achieving the effect of preventing tooth grinding, that is, protecting the teeth when the wearer grinds their teeth and reducing the sound generated by tooth grinding. When the soft layer is located on the outer side of the dental appliance, the sound generated by tooth grinding can be avoided.

[0067] Preferably, the diaphragm for manufacturing the dental appliance of the present invention can be formed into a circular shape, a square shape, or other regular geometric shapes, or can also be formed into an irregular shape.

[0068] In a specific embodiment, the first part 21a and the second part 21b of the sheet body 20 have different thicknesses, and different hardnesses, that is, different mechanical properties, are achieved through different thicknesses. Preferably, the first part 21a and the second part 21b with different thicknesses can be formed by thermally pressing a single-layer sheet. When designing the combination, the total thicknesses of the first part 21a and the second part 21b are different. More preferably, the first part 21a and the second part 21b can be made of the same material or different materials, such as materials like polyurethane, polyester, and polycarbonate. Using diaphragms with different thicknesses can solve the problem of high costs caused by excessive production specifications of multiple thickness diaphragms required for some applications such as invisible dental appliances. The diaphragms with the required thickness can be obtained by thermally pressing standard sheet combinations, and the integrity of the diaphragms is good. Combinations between different materials can also obtain diaphragms of composite materials with different properties, thereby obtaining corresponding mechanical properties. For example, TPU can be combined with PETG or two layers of TPU can sandwich one layer of PETG.

[0069] Theoretically, the diaphragm of the present invention can be designed with parts having multiple hardnesses to correspond to each tooth. However, from actual orthodontic cases, the differences in the orthodontic force of the dental appliance are basically in the front and rear parts of the dental appliance or on the side close to the lip and the side close to the tongue of the dental appliance. Therefore, it is more common to design diaphragms with two hardnesses. The following takes the preparation of a diaphragm with two hardnesses as an example to illustrate the preparation process of the diaphragm of the present invention.

[0070] First, two regions are formed by dividing the area according to the dental orthodontic plan, and the hardness of the two regions is designed according to the required orthodontic force. A mold is provided, and a model space matching the first region is separated within the mold. Then, the first part is formed by an injection molding process within the first model space. After that, the separator is removed, so that the remaining space within the mold matches the shape of the second region. The second part is formed by an injection molding process into the remaining space, and the second part is butted with the first part to form a whole, thus forming a diaphragm within the mold. The temperature during the preparation process will be between 180°C and 240°C. When the raw material of the second part comes into contact with the formed first part, it will melt the edge of the first part, and then the first part and the second part form a whole during molding.

[0071] The present invention also provides a dental appliance, which is made of the above-mentioned diaphragm. The dental appliance is a transparent dental appliance for dental orthodontics. Since the above-mentioned diaphragm has different hardnesses, the formed dental appliance correspondingly has different hardnesses, and the hardness can match the required orthodontic force of the teeth.

[0072] The present invention also provides a method for manufacturing a dental appliance using the above-mentioned diaphragm. The method for manufacturing the dental appliance will be described below.

[0073] The method for manufacturing a dental appliance using the diaphragm of the present invention includes the following steps:

[0074] A diaphragm is prepared according to the dental orthodontic plan. The prepared diaphragm includes at least two parts connected by butt joints, and the at least two parts have different hardnesses;

[0075] The prepared diaphragm is processed to form a dental appliance, and at least two parts of the formed dental appliance have different hardnesses.

[0076] Specifically, the diaphragm and the dental cast model are positioned in the mold, and then the mold is heated to melt the diaphragm. Then, the diaphragm wraps around the dental cast model. After molding, the excess part is cut off to form a dental appliance that matches the dental cast model. Preferably, when manufacturing the dental appliance, the mold is evacuated to make the melted diaphragm tightly wrap around the dental cast model.

[0077] In a specific embodiment, it further includes:

[0078] When manufacturing the diaphragm, a physical gas foaming method is used to prepare the diaphragm, and the formed diaphragm is a foamed profile with uniformly distributed pores inside;

[0079] A needle is used to pierce the diaphragm to make the pores inside the diaphragm non-closed;

[0080] After processing to form the dental appliance, the non-closed pores can adsorb and store active ingredients.

[0081] By using non-closed pores, a certain amount of liquid medicine containing active ingredients can be stored, which can increase the functions of the dental appliance, making it have the effects of whitening, disinfection, cleaning, and health care.

[0082] In a specific embodiment, the steps of preparing the membrane according to the tooth correction plan include:

[0083] S11. Divide the area according to the tooth correction plan to form at least two areas with different required hardnesses; specifically, the hardness of each area is designed according to the required correction force.

[0084] S12. Provide a mold, separate and form a first model space for one of the at least two corresponding areas in the mold, and make a first part with the corresponding hardness through the first model space; specifically, a partition plate matching the shape of the area edge can be designed, and fixing the partition plate in the mold realizes the separation.

[0085] S13. Divide and form a second model space for the next area of the at least two corresponding areas in the mold, and the second model space is connected to the corresponding edge of the first part. Make a second part with the corresponding hardness through the second model space, and the second part is butted with the first part into one body;

[0086] S14. Repeat step S13 until each area of the at least two areas is made into a corresponding part, and the required membrane is obtained.

[0087] Several specific embodiments of making the membrane are given below.

[0088] Embodiment 1

[0089] Main extruder (A), 55mm single-screw membrane extruder, Lubrizol Isoplast 2530 polyurethane is selected, Rockwell Hardness R Scale 121. Secondary extruder (B), 55mm single-screw membrane extruder, Lubrizol Pellethane 2363 polyurethane with a hardness of 55D is selected, and the co-extrusion method is used to make the two-component membrane. Specifically, the parameters are shown in Table 1:

[0090]

[0091] Table 1 shows the preparation parameter configuration of Embodiment 1.

[0092] Embodiment 2

[0093] Main extruder (A), a 55mm single-screw diaphragm extruder, using Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121; auxiliary extruder (B), a 55mm single-screw diaphragm extruder, using Lubrizol Pellethane 2363 polyurethane, Shore hardness: 65D. The double-component diaphragm is made by the co-extrusion method. The specific parameters are shown in Table 2:

[0094]

[0095] Table 2 shows the preparation parameter configuration of Example 2.

[0096] Example 3

[0097] Main extruder (A), a 55mm single-screw diaphragm extruder, using Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121; auxiliary extruder (B), a 55mm single-screw diaphragm extruder, using Lubrizol Pellethane 2363 polyurethane, Shore hardness: 75D. The double-component diaphragm is made by the co-extrusion method. The specific parameters are shown in Table 3:

[0098]

[0099] Table 3 shows the preparation parameter configuration of Example 3.

[0100] Example 4

[0101] Main extruder (A), a 55mm single-screw diaphragm extruder, using Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121. Auxiliary extruder (B), a 55mm single-screw diaphragm extruder, using Lubrizol Pellethane 2363 polyurethane, hardness: 53D. The double-component diaphragm is made by the co-extrusion method. The specific parameters are shown in Table 4:

[0102]

[0103] Table 4 shows the preparation parameter configuration of Example 4.

[0104] Example 5

[0105] Main extruder (A), a 55 mm single-screw film extruder, selects Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121. Secondary extruder (B), a 55 mm single-screw film extruder, selects Lubrizol Pellethane 2363 polyurethane, hardness: 62D, and uses the co-extrusion method to produce a two-component film. Specific parameters are shown in Table 5:

[0106]

[0107]

[0108] Table 5 shows the preparation parameter configuration of Example 5.

[0109] Example 6

[0110] Main extruder (A), a 55 mm single-screw film extruder, selects Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121. Secondary extruder (B), a 55 mm single-screw film extruder, selects CHIMEI PC-115P, hardness: Ball Indentation Hardness 110, and uses the co-extrusion method to produce a two-component film. Specific parameters are shown in Table 6:

[0111]

[0112] Table 6 shows the preparation parameter configuration of Example 6.

[0113] Example 7

[0114] Main extruder (A), a 55 mm single-screw film extruder, selects Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121. Secondary extruder (B), a 55 mm single-screw film extruder, selects Eastar Copolyester 6763, Rockwell Hardness R Scale 106, and uses the co-extrusion method to produce a two-component film. Specific parameters are shown in Table 7:

[0115]

[0116]

[0117] Table 7 shows the preparation parameter configuration of Example 7.

[0118] Example 8

[0119] Injection molding machine, Edex ATOR rotary table double-shot injection molding machine, using Lubrizol Isoplast 2530 polyurethane, Rockwell Hardness R Scale 121; Lubrizol Tecothane TT-1055D polyurethane, Shore 54D. Double-component diaphragm injection molding is carried out using a cold-gate two-color mold. The specific parameters are shown in Table 8:

[0120]

[0121] Table 8 shows the preparation parameter configuration of Example 8.

[0122] The present invention has been described in detail with reference to the embodiments accompanied by drawings. Those of ordinary skill in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation to the present invention, and the protection scope of the present invention will be defined by the scope defined in the appended claims.

Claims

1. A diaphragm for making dental braces, characterized in that, Comprising a sheet body, the sheet body including at least two parts connected by butt joint, the hardness of the at least two parts being different, and the hardness of the corresponding parts being adaptable to the orthodontic force required for the corresponding tooth part, so as to provide targeted orthodontic force for each tooth; the at least two parts corresponding to different regions in the plane where the sheet body is located; One part of the at least two parts is located inside the remaining parts, forming a sheet body shape in which one part is surrounded by the remaining parts inside; Or Part of each of the at least two parts is located at the periphery of the sheet body, forming a shape in which each part has an edge located at the edge of the sheet body; The thicknesses of the at least two parts are the same, and the thickness of the sheet body is uniform; The sheet body includes at least two sheet layers, and the hardness between the at least two sheet layers is different.

2. The diaphragm for making a dental appliance according to claim 1, wherein, The materials of the at least two parts are different or the same.

3. The diaphragm for making a dental appliance according to claim 1, wherein The sheet body is a foamed profile, with uniformly distributed pores inside, and the pores are non-closed; the sheet body is made by the physical gas foaming method, and the pores inside the foamed profile formed by foaming are all airtight. After the foamed profile is obtained, the pores are made non-closed by means of acupuncture.

4. A dental appliance, characterized in that, The dental appliance is made of the membrane as described in any one of claims 1 to 3.

5. A method for manufacturing a dental brace using a diaphragm as described in any one of claims 1 to 3, characterized in that, Including the following steps: Preparing a membrane according to a tooth orthodontic plan, the prepared membrane including at least two parts connected by butt joint, and the hardness of the at least two parts being different; Processing the prepared membrane to form a dental appliance, and at least two parts of the formed dental appliance having different hardnesses.

6. The method according to claim 5, wherein Further including: When making the membrane, preparing and forming the membrane by the physical gas foaming method, and the formed membrane being a foamed profile with uniformly distributed pores inside; Inserting a needle into the membrane to make the pores inside the membrane non-closed; After processing to form the dental appliance, the non-closed pores can be used to adsorb and store active ingredients.

7. The method according to claim 5, wherein The step of preparing the membrane according to the tooth orthodontic plan includes: S11. Dividing regions according to the tooth orthodontic plan to form at least two regions, and the hardnesses required for the at least two regions being different; S12. Providing a mold, separating and forming a first model space corresponding to one of the at least two regions in the mold, and making a first part with a corresponding hardness through the first model space; S13. Separating and forming a second model space corresponding to the next region among the at least two regions in the mold, and the second model space being connected to the edge corresponding to the first part, making a second part with a corresponding hardness through the second model space, and the second part being butted and integrated with the first part; S14. Repeating step S13 until corresponding parts are made for each of the at least two regions, and the required membrane is obtained.

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