Manufacturing method of transparent orthodontic device and method for manufacturing transparent orthodontic device manufactured by the method

Abstract

A transparent orthodontic device and a method for manufacturing the transparent orthodontic device are disclosed. The disclosed method for manufacturing the transparent orthodontic device includes a step (S10) of 3D printing an orthodontic device using a transparent orthodontic device forming composition as a raw material, a step (S20) of removing uncured resin and liquid from the orthodontic device obtained in the step (S10), a step (S30) of post-curing the orthodontic device obtained in the step (S20), a step (S40) of post-heat treating the orthodontic device obtained in the step (S30), and a step (S50) of cleaning the orthodontic device obtained in the step (S40).

Description

[Technical field]

[0001] A method for manufacturing a transparent orthodontic device and a transparent orthodontic device manufactured by the method are disclosed. More specifically, a method for manufacturing a transparent orthodontic device that can manufacture a transparent orthodontic device with excellent transparency and a transparent orthodontic device manufactured by the method are disclosed. [Background technology]

[0002] Most existing transparent orthodontic appliances are thermoplastic, and are devices that achieve the desired tooth movement by hot pressing a plate-shaped transparent polymer composite resin (hereinafter referred to as "resin"). Unlike conventional orthodontic appliances, transparent orthodontic appliances do not have structures that stick out and stand out from the teeth, and are almost transparent in color, making them very aesthetically pleasing compared to conventional orthodontic appliances. Therefore, many people who want to undergo orthodontic treatment are unable to do so due to concerns that wearing an orthodontic appliance on their teeth will have a negative impact on their work life, interpersonal relationships, and self-confidence, but with transparent orthodontic appliances, they can receive orthodontic treatment without any stress. In addition, the appliances are thin and easy to wear, and can be removed from the mouth for a while when eating or brushing their teeth, so there is significantly less inconvenience in daily life. Therefore, the public's interest and demand for orthodontic treatment using transparent orthodontic appliances is growing, and the market for transparent orthodontic appliances is continuously expanding. However, conventional transparent orthodontic devices were not transparent enough to meet users' aesthetic needs, and transparent orthodontic devices made using 3D printing rather than thermoplastic resin also had problems with achieving a high enough transparency and difficulty in post-processing, meaning they could not meet users' aesthetic needs. Summary of the Invention [Problem to be solved by the invention]

[0003] One embodiment of the present invention provides a method for manufacturing a transparent orthodontic device that can produce a transparent orthodontic device with excellent transparency. Another embodiment of the present invention provides a transparent orthodontic device manufactured by the above-mentioned method for manufacturing a transparent orthodontic device. [Means for solving the problem]

[0004] Hereinafter, a method for manufacturing a transparent orthodontic device according to an embodiment of the present invention will be described in detail. In this specification, the term "composition for forming a transparent orthodontic appliance" refers to a solution, suspension, or paste-like substance containing a photocurable compound, a photoinitiator, and a liquid but not containing a pigment. For example, the composition for forming a transparent orthodontic appliance may be one disclosed in Korean Patent Application No. 10-2020-0107965. Korean Patent Application No. 10-2020-0107965 is incorporated herein in its entirety. In addition, in this specification, "partial curing" means that the curing rate is 40% to 90%. In addition, in this specification, the term "complete curing" means that the curing rate is 99% to 100%. A method for manufacturing a transparent orthodontic device according to one embodiment of the present invention may include a step (S10) of 3D printing an orthodontic device using a transparent orthodontic device forming composition as a raw material, a step (S20) of removing uncured resin and liquid (e.g., water) from the orthodontic device obtained in step (S10), a step (S40) of post-heat treating the orthodontic device obtained in step (S20), and a step (S50) of cleaning the orthodontic device obtained in step (S40). The step (S20) can be performed by injecting compressed air of 5 to 12 bar into the orthodontic appliance. If the pressure of the compressed air is within the above range, the transparency of the orthodontic appliance can be improved.

[0005] For example, the step (S20) can be performed using an air gun. The step (S30) can be performed at a temperature of 60 to 90° C. If the post-curing temperature in the step (S30) is within the above range, the transparency of the orthodontic appliance can be improved. The step (S40) can be performed by decreasing the temperature at 25° C. / min or less from a starting temperature of 60 to 90° C. For example, the step (S40) can be performed to a final temperature of 15 to 50° C. If the post-heat treatment conditions of the step (S40) are within the above ranges, the transparency of the orthodontic appliance can be improved. The step (S50) may include a cleaning solution cleaning step (S50-1) and a water cleaning step (S50-2). For example, the cleaning solution cleaning step (S50-1) may be performed using a cleaning solution including alcohol, isopropyl alcohol, ethanol, tripropylene glycol monomethyl ether (TPM), or a combination thereof. Between the cleaning solution washing step (S50-1) and the water washing step (S50-2), there may be an interval of 5 minutes or more to allow the cleaning solution to completely dry. If the cleaning time difference between the cleaning solution washing step (S50-1) and the water washing step (S50-2) is within the above range, the transparency of the orthodontic appliance may be improved. Another aspect of the present invention provides a transparent orthodontic appliance manufactured by the method of manufacturing a transparent orthodontic appliance. The transparent orthodontic appliance thus manufactured has the advantage of being superior in transparency compared to conventional transparent orthodontic appliances.

[0006] Production Example 1: Production of a composition for forming a transparent orthodontic device As the photocurable compound, diurethane dimethacrylate represented by the above chemical formula 1 (Cas No. 72869-86-4, a mixture of a substance where R=H and a substance where R=CH3, molecular formula: C 23 H 38N2O8) (PP1), bisphenol A ethoxylate dimethacrylate (Cas No. 41637-38-1) (PP2) represented by the above chemical formula 2, hydroxyethyl methacrylate (Cas No. 868-77-9) (PP3) represented by the above chemical formula 3, urethane acrylate oligomer (Cas No. 106556-00-7) (PP4) represented by the above chemical formula 4, and triethylene glycol dimethacrylate (Cas No. 109-16-0) (PP5) represented by the above chemical formula 5, Diana BR-83 (manufactured by Mitsubishi Rayon, glass transition temperature 105°C, weight average molecular weight 40,000) as an acrylic resin, phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (Cas No. A transparent composition for forming an orthodontic appliance was prepared containing 1,2,3,4-trimethylsilyl acrylate (162881-26-7) as an antioxidant, and 2,6-di-t-butyl-p-cresol as an antioxidant. The materials and contents used in each example and comparative example are shown in Table 1 below. In Table 1 below, the units of each value are parts by weight. The contents of the acrylic resin, photoinitiator, and antioxidant are based on 100 parts by weight of the total weight of the above five photopolymerizable compounds.

[0007] [Chemical formula 1] R'CH2[C(CH3)(R)CH2]2CH2R'(R=H or CH3, R'=NHCO2CH2CH2O2CC(CH3)=CH2) [Chemical formula 2] [ka] [Chemical formula 3] CH2=C(CH3)COOCH2CH2OH [Chemical formula 4] [ka] [Chemical formula 5] CH2=C(CH3)COO(CH2CH2O)3COC(CH3)=CH2. [Table 1]

[0008] Example 1: Fabrication of a transparent orthodontic appliance *First, the transparent orthodontic appliance forming composition manufactured in Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, 8 bar compressed air was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 25°C at a rate of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance. Example 2: Fabrication of Transparent Orthodontic Appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, compressed air of 5 bar was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 25°C at a temperature decreasing rate of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance. Example 3: Fabrication of transparent orthodontic appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, compressed air of 12 bar was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 25°C at a temperature decreasing rate of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance.

[0009] Example 4: Fabrication of Transparent Orthodontic Appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, compressed air of 8 bar was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 60°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 60°C to 25°C at a temperature decrease rate of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance. Example 5: Fabrication of Transparent Orthodontic Appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, 8 bar compressed air was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 90°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 90°C to 25°C at a temperature drop of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance. Example 6: Fabrication of Transparent Orthodontic Appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, 8 bar compressed air was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 25°C at a temperature drop of 5°C / min or less to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance.

[0010] Example 7: Fabrication of Transparent Orthodontic Appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, 8 bar compressed air was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 50°C at a temperature drop of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance. Example 8: Fabrication of transparent orthodontic appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, 8 bar compressed air was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 25°C at a temperature decreasing rate of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 20 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance. Comparative Example 1: Manufacturing of Transparent Orthodontic Appliances First, the transparent orthodontic device forming composition manufactured in Manufacturing Example 1 was used as a raw material, and a first orthodontic device was output by a 3D printer. The first orthodontic device was partially cured. The first orthodontic device was then completely washed with isopropyl alcohol to obtain a second orthodontic device. The second orthodontic device was then post-cured at 75°C to obtain a third orthodontic device. The third orthodontic device was then post-heat-treated from a starting temperature of 75°C to 25°C at a rate of 25°C / min to obtain a fourth orthodontic device.

[0011] Comparative Example 2: Manufacturing of Transparent Orthodontic Appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, 3 bar compressed air was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 25°C at a temperature decreasing rate of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance. Comparative Example 3: Manufacturing of Transparent Orthodontic Appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, compressed air of 14 bar was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 25°C at a temperature decreasing rate of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance. Comparative Example 4: Manufacturing of a transparent orthodontic appliance First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, 8 bar compressed air was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 30°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 30°C to 25°C at a temperature drop of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance.

[0012] Comparative Example 5: Manufacturing of Transparent Orthodontic Appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, 8 bar compressed air was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 120°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 120°C to 25°C at a temperature decreasing rate of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance. Comparative Example 6: Manufacturing of Transparent Orthodontic Appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, 8 bar compressed air was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 25°C at a temperature drop of 30°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 5 minutes, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance.

[0013] Comparative Example 7: Manufacturing of a transparent orthodontic appliance First, the transparent orthodontic appliance forming composition manufactured in Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, compressed air of 8 bar was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the post-cured third orthodontic appliance was immediately washed completely with isopropyl alcohol without post-heat treatment to obtain a fourth orthodontic appliance. After 5 minutes, the fourth orthodontic appliance was completely washed with water to obtain a fifth orthodontic appliance. Comparative Example 8: Manufacturing of Transparent Orthodontic Appliances First, the transparent orthodontic appliance forming composition manufactured in Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, compressed air of 8 bar was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 25°C at a temperature decreasing rate of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. Then, immediately without a time interval, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance.

[0014] Reference Example 1: Manufacturing of transparent orthodontic appliances First, the transparent orthodontic appliance forming composition manufactured in the above Manufacturing Example 1 was used as a raw material, and a first orthodontic appliance was output by a 3D printer. The first orthodontic appliance was partially cured. Then, 8 bar compressed air was sprayed onto the first orthodontic appliance with an air gun to remove uncured resin and liquid, and a second orthodontic appliance was obtained. Then, the second orthodontic appliance was post-cured at 75°C to obtain a third orthodontic appliance. Then, the third orthodontic appliance was post-heat-treated from a starting temperature of 75°C to 25°C at a temperature decrease rate of 25°C / min to obtain a fourth orthodontic appliance. Then, the fourth orthodontic appliance was completely washed with isopropyl alcohol to obtain a fifth orthodontic appliance. After 1 minute, the fifth orthodontic appliance was completely washed with water to obtain a sixth orthodontic appliance. Evaluation example 1: Transparency evaluation of transparent orthodontic appliances A sensory test was conducted on the transparent orthodontic appliances manufactured in each of the above examples and comparative examples. Specifically, the sensory test was conducted by five trained evaluators using the following method. That is, the transparency level of each transparent orthodontic appliance was evaluated by naked eye observation using a 5-point scale, and the scores were averaged and shown in Table 2 below. Here, the higher the score for each item, the higher the transparency of that item. Photographs of the orthodontic appliances manufactured in Example 1, Comparative Example 1, Comparative Example 2, and Comparative Example 6 are shown in Figs. 1 to 4, respectively. [Table 2] Referring to Table 2 and Figures 1 to 4 above, it can be seen that the transparent orthodontic devices of Examples 1 to 8 have higher transparency than the transparent orthodontic devices of Comparative Examples 1 to 8 and Reference Example 1. Although the preferred embodiments of the present invention have been described above with reference to the drawings and examples, these are merely illustrative, and those skilled in the art will appreciate that various modifications and equivalents are possible. Therefore, the scope of the present invention should be determined by the appended claims. Effect of the Invention

[0015] A method for manufacturing a transparent orthodontic appliance according to an embodiment of the present invention may provide a transparent orthodontic appliance. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a photograph showing the transparent orthodontic appliance manufactured in Example 1. [Diagram 2] FIG. 2 is a photograph showing the transparent orthodontic appliance manufactured in Comparative Example 1. [Diagram 3] FIG. 3 is a photograph showing the transparent orthodontic appliance manufactured in Comparative Example 2. [Figure 4] FIG. 4 is a photograph showing the transparent orthodontic appliance manufactured in Comparative Example 6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] One aspect of the present invention is A step of 3D printing an orthodontic appliance using the transparent orthodontic appliance forming composition as a raw material (S10); A step (S20) of removing uncured resin and liquid from the orthodontic appliance obtained in the above step (S10); a step (S30) of post-curing the orthodontic appliance obtained in the step (S20); A step (S40) of post-heat treating the orthodontic appliance obtained in the step (S30); and The present invention provides a method for manufacturing a transparent orthodontic appliance, comprising the step (S50) of cleaning the orthodontic appliance obtained in the step (S40). The step (S20) can be carried out by injecting compressed air of 5 to 12 bar into the orthodontic appliance. The above step (S30) can be carried out at a temperature of 60 to 90°C. The step (S40) can be carried out by starting at a temperature of 60 to 90° C. and decreasing the temperature at a rate of 25° C. / min or less. The above step (S50) may include a cleaning solution cleaning step (S50-1) and a water cleaning step (S50-2). Between the cleaning liquid washing step (S50-1) and the water washing step (S50-2), there may be an interval of 5 minutes or more to allow the cleaning liquid to completely dry.

Claims

[Claim 1] A step of 3D printing an orthodontic appliance using the transparent orthodontic appliance forming composition as a raw material (S10); A step (S20) of removing uncured resin and liquid from the orthodontic appliance obtained in the step (S10); a step (S30) of post-curing the orthodontic appliance obtained in the step (S20); A step (S40) of post-heat treating the orthodontic appliance obtained in the step (S30); and The method includes a step (S50) of cleaning the orthodontic appliance obtained in the step (S40), The step (S20) is carried out by injecting compressed air of 5 to 12 bar into the orthodontic appliance, The step (S30) is carried out at a temperature of 60 to 90°C. The step (S40) is carried out at a temperature of 60 to 90°C starting temperature and decreasing the temperature at 25°C / min or less. The step (S50) includes a cleaning solution cleaning step (S50-1) using a cleaning solution containing alcohol, isopropyl alcohol, ethanol, tripropylene glycol monomethyl ether (TPM) or a combination thereof, and a water cleaning step (S50-2), A method for manufacturing a transparent orthodontic appliance, wherein an interval of 5 minutes or more exists between the cleaning solution washing step (S50-1) and the water washing step (S50-2) to allow the cleaning solution to completely dry.

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