Method of manufacturing a transparent orthodontic device and transparent orthodontic device manufactured using the method

Abstract

Disclosed is a transparent orthodontic device and a method for manufacturing the same. The disclosed method for manufacturing a transparent orthodontic device comprises: a stage (S10) of manufacturing an orthodontic device by a 3D printing technique using a transparent orthodontic device molding composition as a raw material; a stage (S20) of removing un-solidified resin and liquid from the orthodontic device obtained in the above stage (S10); a stage (S30) of performing post-solidification on the orthodontic device obtained in the above stage (S20); a stage (S40) of performing post-heat treatment on the orthodontic device obtained in the above stage (S30); and a stage (S50) of cleaning the orthodontic device obtained in the above stage (S40).

Description

TECHNICAL FIELD

[0001] Disclosed are a manufacturing method of a transparent orthodontic device and a transparent orthodontic device manufactured using the method. Specifically, disclosed are a method of manufacturing a transparent orthodontic device with excellent transparency and a transparent orthodontic device manufactured using the method. BACKGROUND

[0002] Most of the existing transparent orthodontic devices are thermoplastic. This means that a high-molecular transparent composite resin (hereinafter referred to as "resin") in the form of a plate is subjected to heat press molding to achieve a device that moves target teeth. Like ordinary orthodontic devices, transparent orthodontic devices are attached to teeth, so there is a certain degree of protrusion. Transparent orthodontic devices have no conspicuous structures or metal wires, and are almost transparent in color, which is superior to ordinary orthodontic devices in terms of aesthetics. Therefore, in many cases, although people want to undergo orthodontic treatment, they ultimately do not choose to undergo orthodontic treatment because they are concerned that attaching an orthodontic device to their teeth will have a negative impact on their work life, interpersonal relationships, or self-confidence. Using a transparent orthodontic device can avoid this burden, allowing people to undergo orthodontic treatment with peace of mind. In addition, the device is thin and comfortable to wear. It can also be temporarily removed from the mouth when eating or brushing teeth, significantly reducing the inconvenience in daily life. Malocclusion occurs at a high frequency in the population, and the public is bound to have high interest and demand for orthodontic treatment based on transparent orthodontic devices. Therefore, the market size for transparent orthodontic devices is continuing to expand.

[0003] However, the transparency of the transparent orthodontic devices of the past is not high enough, resulting in a failure to meet the aesthetic needs of users. After using 3D printing technology instead of thermoplastic resin, it is also difficult for the orthodontic device to achieve sufficient transparency through post-processing. Therefore, there is a limitation in that the aesthetic needs of users cannot be met. SUMMARY

[0004] TECHNICAL PROBLEM

[0005] One embodiment of the present application provides a manufacturing method for manufacturing a transparent orthodontic device with excellent transparency, and another embodiment provides a transparent orthodontic device manufactured using the manufacturing method of the transparent orthodontic device described above.

[0006] TECHNICAL SOLUTION

[0007] Hereinafter, the manufacturing method of the transparent orthodontic device mentioned in one embodiment of the present application will be described in detail.

[0008] In the present invention, the "transparent orthodontic device forming composition" refers to a solution, suspension, or slurry material containing a photocurable compound, a photoinitiator, and a liquid, but does not include a pigment. For example, the transparent orthodontic device forming composition described above can be the material shown in Korean Patent Application No. 10-2020-0107965. The entire contents of Korean Patent Application No. 10-2020-0107965 are incorporated into the present specification.

[0009] In addition, in the present specification, "partial curing" refers to curing with a curing rate of 40% to 90%.

[0010] In addition, in the present specification, "complete curing" refers to curing with a curing rate of 99% to 100%.

[0011] The manufacturing method of the transparent orthodontic device mentioned in one embodiment of the present invention includes a stage (S10) of manufacturing an orthodontic device by using a transparent orthodontic device forming composition as a raw material through a 3D printing technique, a stage (S20) of removing uncured resin and a liquid (for example, water) from the orthodontic device obtained in the above stage (S10), a stage (S30) of performing post-curing on the orthodontic device obtained in the above stage (S20), a stage (S40) of performing post-heat treatment on the orthodontic device obtained in the above stage (S30), and a stage (S50) of performing cleaning on the orthodontic device obtained in the above stage (S40).

[0012] The above stage (S20) can be performed by spraying compressed air of 5 to 12 bar to the orthodontic device. When the pressure of the air compressor is in the above range, the transparency of the orthodontic device can be improved.

[0013] For example, the above stage (S20) can be performed by using an air gun.

[0014] The above stage (S30) can be performed at a temperature condition of 60 to 90℃. When the post-curing temperature of the above stage (S30) is in the above range, the transparency of the orthodontic device can be improved.

[0015] The above stage (S40) can be performed by setting 60 to 90℃ as an initial temperature and then performing temperature decrease at a rate of less than 25℃ / min. For example, the above stage (S40) can set a final temperature of 15 to 50℃. When the post-treatment condition of the above stage (S40) is in the above range, the transparency of the orthodontic device can be improved.

[0016] The stage S50 can include a cleaning liquid cleaning stage S50-1 and a clean water cleaning stage S50-2. For example, the cleaning liquid cleaning stage S50-1 can be performed by using a cleaning liquid containing alcohol, isopropyl alcohol, ethanol, tripropylene glycol methyl ether (TPM), or a combination thereof.

[0017] There can be a time interval of 5 minutes or more between the cleaning liquid cleaning stage S50-1 and the clean water cleaning stage S50-2 for allowing the cleaning liquid to dry completely. When the cleaning time interval between the cleaning liquid cleaning stage S50-1 and the clean water cleaning stage S50-2 is within the above range, the transparency of the dental aligner can be improved.

[0018] On the other hand, the present application also provides a transparent dental aligner produced using the manufacturing method of the transparent dental aligner.

[0019] Compared with the existing transparent dental aligner, the manufactured transparent dental aligner has the advantage of higher transparency.

[0020] Production Example 1: Production of a transparent orthodontic device molding composition

[0021] A transparent dental aligner forming composition was manufactured containing a photocurable compound

a diurethane dimethacrylate (Cas No. 72869-86-4, a mixture of a substance in which R = H and a substance in which R = R = CH3, molecular formula: C 23 H 38 N2O8) (PP1), an ethoxylated bisphenol A dimethacrylate (Cas No. 41637-38-1) (PP2), a hydroxyethyl methacrylate (Cas No. 868-77-9) (PP3), a polyurethane acrylate oligomer (Cas No. 106556-00-7) (PP4), and a triethylene glycol dimethacrylate (Cas No. 109-16-0) (PP5) represented by the above Chemical Formula 5

【Dianal BR-83 (manufactured by Mitsubishi Rayon, glass transition temperature 105°C, weight average molecular weight 40,000), a photopolymerization initiator

phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide (Cas No. 162881-26-7)

[0022]

Chemical Formula 1

[0023] R'CH2[C(CH3)(R)CH2]2CH2R' (R = H or CH3,

[0024] R' = NHCO2CH2CH2O2CC(CH3) = CH2)

[0025] [Chemical Formula 2]

[0026]

[0027] [Chemical Formula 3]

[0028] CH2= C(CH3)COOCH2CH2OH

[0029] [Chemical Formula 4]

[0030]

[0031] [Chemical Formula 5]

[0032] CH2= C(CH3)COO(CH2CH2O)3COC(CH3) = CH2

[0033]

[0034]

[0035] Example 1: Production of a transparent orthodontic device

[0036] *First, a first dental aligner was printed using the transparent dental aligner molding composition produced in Production Example 1 above as a raw material by a 3D printer. The first dental aligner was a partially solidified product. Thereafter, the first dental aligner was sprayed with 8 bar compressed air using an air spray gun to remove the uncured resin and liquid, and a second dental aligner was obtained. Thereafter, the second dental aligner was post-cured at a temperature of 75°C, and a third dental aligner was obtained. Thereafter, the third dental aligner was post-heated at a temperature of 75°C as a starting temperature at a temperature decrease rate of 25°C / min to decrease the temperature to 25°C, and a fourth dental aligner was obtained. Thereafter, the fourth dental aligner was thoroughly washed with isopropyl alcohol, and a fifth dental aligner was obtained. After 5 minutes, the fifth dental aligner was thoroughly washed with clean water, and a sixth dental aligner was obtained.

[0037] Example 2: Production of a transparent orthodontic device

[0038] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, the 1st dental aligner was sprayed with 5 bar of compressed air using an air spray gun, and the uncured resin and liquid were removed, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-cured at a temperature of 75°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heat treated at a temperature of 75°C as a starting temperature, and was cooled to 25°C at a cooling rate of 25°C / min, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was thoroughly washed with isopropyl alcohol, and a 5th dental aligner was obtained. After 5 minutes, the 5th dental aligner was thoroughly washed with clean water, and a 6th dental aligner was obtained.

[0039] Example 3: Production of a transparent orthodontic device

[0040] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, the 1st dental aligner was sprayed with 5 bar of compressed air using an air spray gun, and the uncured resin and liquid were removed, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-cured at a temperature of 75°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heat treated at a temperature of 75°C as a starting temperature, and was cooled to 25°C at a cooling rate of 25°C / min, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was thoroughly washed with isopropyl alcohol, and a 5th dental aligner was obtained. After 5 minutes, the 5th dental aligner was thoroughly washed with clean water, and a 6th dental aligner was obtained.

[0041] Example 4: Production of a transparent orthodontic device

[0042] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, the 1st dental aligner was sprayed with 8 bar of compressed air using an air spray gun to remove uncured resin and liquid, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-cured at a temperature of 60°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heated at a temperature of 60°C as a starting temperature at a temperature decreasing rate of 25°C / min to decrease to 25°C, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was thoroughly washed with isopropyl alcohol, and a 5th dental aligner was obtained. After 5 minutes, the 5th dental aligner was thoroughly washed with clean water, and a 6th dental aligner was obtained.

[0043] Example 5: Production of a transparent orthodontic device

[0044] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, the 1st dental aligner was sprayed with 8 bar of compressed air using an air spray gun to remove uncured resin and liquid, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-cured at a temperature of 90°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heated at a temperature of 90°C as a starting temperature at a temperature decreasing rate of 25°C / min to decrease to 25°C, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was thoroughly washed with isopropyl alcohol, and a 5th dental aligner was obtained. After 5 minutes, the 5th dental aligner was thoroughly washed with clean water, and a 6th dental aligner was obtained.

[0045] Example 6: Production of a transparent orthodontic device

[0046] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially solidified product. Thereafter, the 1st dental aligner was sprayed with 8 bar of compressed air using an air spray gun to remove the un-solidified resin and liquid, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-solidified at a temperature of 75°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heat treated at a temperature of 75°C as a starting temperature at a temperature decreasing rate of less than 5°C / min to decrease to 25°C, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was thoroughly washed with isopropyl alcohol, and a 5th dental aligner was obtained. After 5 minutes, the 5th dental aligner was thoroughly washed with clean water, and a 6th dental aligner was obtained.

[0047] Example 7: Production of a transparent orthodontic device

[0048] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially solidified product. Thereafter, the 1st dental aligner was sprayed with 8 bar of compressed air using an air spray gun to remove the un-solidified resin and liquid, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-solidified at a temperature of 75°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heat treated at a temperature of 75°C as a starting temperature at a temperature decreasing rate of less than 5°C / min to decrease to 25°C, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was thoroughly washed with isopropyl alcohol, and a 5th dental aligner was obtained. After 5 minutes, the 5th dental aligner was thoroughly washed with clean water, and a 6th dental aligner was obtained.

[0049] Example 8: Production of a transparent orthodontic device

[0050] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, a 2nd dental aligner was obtained by spraying 8 bar of compressed air to the 1st dental aligner using an air spray gun to remove uncured resin and liquid. Thereafter, a 3rd dental aligner was obtained by post-curing the 2nd dental aligner at a temperature of 75°C. Thereafter, a 4th dental aligner was obtained by post-heat treating the 3rd dental aligner at a temperature of 75°C as a starting temperature at a temperature decreasing rate of 25°C / min to decrease the temperature to 25°C. Thereafter, a 5th dental aligner was obtained by thoroughly washing the 4th dental aligner using isopropyl alcohol. After 20 minutes, a 6th dental aligner was obtained by thoroughly washing the 5th dental aligner using clean water.

[0051] Comparative Example 1: Production of a transparent orthodontic device

[0052] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, a 2nd dental aligner was obtained by thoroughly washing the 1st dental aligner using isopropyl alcohol. Thereafter, a 3rd dental aligner was obtained by post-curing the 2nd dental aligner at a temperature of 75°C. Thereafter, a 4th dental aligner was obtained by post-heat treating the 3rd dental aligner at a temperature of 75°C as a starting temperature at a temperature decreasing rate of 25°C / min to decrease the temperature to 25°C.

[0053] Comparative Example 2: Production of a transparent orthodontic device

[0054] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, a 2nd dental aligner was obtained by spraying 3 bar of compressed air to the 1st dental aligner using an air spray gun to remove uncured resin and liquid. Thereafter, a 3rd dental aligner was obtained by post-curing the 2nd dental aligner at a temperature of 75°C. Thereafter, a 4th dental aligner was obtained by post-heat treating the 3rd dental aligner at a temperature of 75°C as a starting temperature at a temperature decreasing rate of 25°C / min to decrease the temperature to 25°C. Thereafter, a 5th dental aligner was obtained by thoroughly washing the 4th dental aligner using isopropyl alcohol. After 5 minutes, a 6th dental aligner was obtained by thoroughly washing the 5th dental aligner using clean water.

[0055] Comparative Example 3: Production of a transparent orthodontic device

[0056] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, the 1st dental aligner was sprayed with 14 bar of compressed air using an air spray gun to remove uncured resin and liquid, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-cured at a temperature of 75°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heat treated at a temperature of 75°C as a starting temperature at a temperature decrease rate of 25°C / min to decrease to 25°C, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was thoroughly washed with isopropyl alcohol, and a 5th dental aligner was obtained. After 5 minutes, the 5th dental aligner was thoroughly washed with clean water, and a 6th dental aligner was obtained.

[0057] Comparative Example 4: Production of a transparent orthodontic device

[0058] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, the 1st dental aligner was sprayed with 14 bar of compressed air using an air spray gun to remove uncured resin and liquid, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-cured at a temperature of 75°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heat treated at a temperature of 75°C as a starting temperature at a temperature decrease rate of 25°C / min to decrease to 25°C, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was thoroughly washed with isopropyl alcohol, and a 5th dental aligner was obtained. After 5 minutes, the 5th dental aligner was thoroughly washed with clean water, and a 6th dental aligner was obtained.

[0059] Comparative Example 5: Production of a transparent orthodontic device

[0060] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, the 1st dental aligner was sprayed with 8 bar of compressed air using an air spray gun to remove uncured resin and liquid, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-cured at a temperature of 120°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heated at a starting temperature of 120°C at a temperature decreasing rate of 25°C / min to decrease to 25°C, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was thoroughly washed with isopropyl alcohol, and a 5th dental aligner was obtained. After 5 minutes, the 5th dental aligner was thoroughly washed with clean water, and a 6th dental aligner was obtained.

[0061] Comparative Example 6: Production of a transparent orthodontic device

[0062] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition manufactured in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, the 1st dental aligner was sprayed with 8 bar of compressed air using an air spray gun to remove uncured resin and liquid, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-cured at a temperature of 75°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heated at a starting temperature of 75°C at a temperature decreasing rate of 30°C / min to decrease to 25°C, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was thoroughly washed with isopropyl alcohol, and a 5th dental aligner was obtained. After 5 minutes, the 5th dental aligner was thoroughly washed with clean water, and a 6th dental aligner was obtained.

[0063] Comparative Example 7: Production of a transparent orthodontic device

[0064] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition produced in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, the 1st dental aligner was sprayed with 8 bar of compressed air using an air spray gun to remove uncured resin and liquid, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-cured at a temperature of 75°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was immediately washed thoroughly with isopropyl alcohol without post-heating, and a 4th dental aligner was obtained. After 5 minutes, the 4th dental aligner was washed thoroughly with clean water, and a 5th dental aligner was obtained.

[0065] Comparative Example 8: Production of a transparent orthodontic device

[0066] First, a 1st dental aligner was printed by a 3D printer using the transparent dental aligner molding composition produced in Production Example 1 as a raw material. The 1st dental aligner was a partially cured product. Thereafter, the 1st dental aligner was sprayed with 8 bar of compressed air using an air spray gun to remove uncured resin and liquid, and a 2nd dental aligner was obtained. Thereafter, the 2nd dental aligner was post-cured at a temperature of 75°C, and a 3rd dental aligner was obtained. Thereafter, the 3rd dental aligner was post-heated at a temperature of 75°C at a temperature decrease rate of 25°C / min to decrease the temperature to 25°C, and a 4th dental aligner was obtained. Thereafter, the 4th dental aligner was washed thoroughly with isopropyl alcohol, and a 5th dental aligner was obtained. Thereafter, the 5th dental aligner was immediately washed thoroughly with clean water without an interval, and a 6th dental aligner was obtained.

[0067] Reference Example 1: Production of a transparent orthodontic device

[0068] First, a first dental aligner was printed by using the transparent dental aligner molding composition produced in Production Example 1 as a raw material, and by using a 3D printer. The first dental aligner was a partially solidified product. Thereafter, the first dental aligner was sprayed with compressed air at 8 bar using an air spray gun, and the uncured resin and liquid were removed, and a second dental aligner was obtained. Thereafter, the second dental aligner was subjected to post-curing at a temperature of 75°C, and a third dental aligner was obtained. Thereafter, the third dental aligner was subjected to post-heat treatment at a temperature of 75°C as a starting temperature, and at a temperature decrease rate of 25°C / min, and the temperature was decreased to 25°C, and a fourth dental aligner was obtained. Thereafter, the fourth dental aligner was thoroughly washed with isopropyl alcohol, and a fifth dental aligner was obtained. After 1 minute, the fifth dental aligner was thoroughly washed with clean water, and a sixth dental aligner was obtained.

[0069] Evaluation Example 1: Production of a transparent orthodontic device

[0070] The transparent dental aligners produced in each of the above examples and comparative examples were subjected to a functional test. Specifically, a functional test was performed according to the following method, with 5 trained evaluators as the subjects. That is, the level of transparency of each transparent dental aligner was evaluated according to visual observation on a 5-point scale, and then the average of each score was calculated, and the results are shown in Table 2. Here, the higher the score of each group, the higher the transparency of that group.

[0071] In addition, Figure 1 to Figure 4 show photographs of the dental aligners produced in Example 1, Comparative Example 1, Comparative Example 2, and Comparative Example 6, respectively.

[0072] Table 2

[0073]

[0074] Referring to Table 2 above, and Figure 1 to Figure 4 , it can be seen that the transparent dental aligners of Examples 1 to 8 have higher transparency than Comparative Examples 1 to 8 and Reference Example 1. In the above, the preferred embodiments of the present application are described with reference to the photographs and examples. However, this is merely an example, and anyone having ordinary knowledge in the technical field can understand various modifications and equivalent other embodiments resulting therefrom. Therefore, the scope of protection of the present application should be determined according to the scope of the patent application in the annex.

[0075] Effects of the Invention

[0076] The manufacturing method of the transparent orthodontic device mentioned in one embodiment of the present application can provide the transparent orthodontic device. BRIEF DESCRIPTION OF DRAWINGS

[0077] Figure 1 is a photograph showing the transparent orthodontic device manufactured in Comparative Example 1.

[0078] Figure 2 is a photograph showing the transparent orthodontic device manufactured in Comparative Example 1.

[0079] Figure 3 is a photograph showing the transparent orthodontic device manufactured in Comparative Example 2.

[0080] Figure 4 is a photograph showing the transparent orthodontic device manufactured in Comparative Example 6.

[0081] BEST MODE FOR CARRYING OUT THE INVENTION

[0082] One aspect of the present application provides a manufacturing method of a transparent orthodontic device comprising the following stages:

[0083] a stage (S10) of manufacturing an orthodontic device by using a transparent orthodontic device molding composition as a raw material through a 3D printing technique;

[0084] a stage (S20) of removing un-solidified resin and liquid from the orthodontic device obtained in the above stage (S10);

[0085] a stage (S30) of performing post-solidification on the orthodontic device obtained in the above stage (S20); and a stage (S40) of performing post-heat treatment on the orthodontic device obtained in the above stage (S30);

[0086] a stage (S50) of performing cleaning on the orthodontic device obtained in the above stage (S40). DETAILED DESCRIPTION

[0087] One aspect of the present application provides a manufacturing method of a transparent orthodontic device comprising the following stages:

[0088] a stage (S10) of manufacturing an orthodontic device by using a transparent orthodontic device molding composition as a raw material through a 3D printing technique;

[0089] a stage (S20) of removing un-solidified resin and liquid from the orthodontic device obtained in the above stage (S10);

[0090] a stage (S30) of performing post-solidification on the orthodontic device obtained in the above stage (S20);

[0091] a stage (S40) of performing a post-heat treatment on the dental appliance obtained in the stage (S30) above;

[0092] a stage (S50) of performing a cleaning on the dental appliance obtained in the stage (S40) above.

[0093] The stage (S20) above can be performed by spraying compressed air at 5-12 bar onto the dental appliance.

[0094] The stage (S30) above can be performed at a temperature of 60-90 °C.

[0095] The stage (S40) above can be performed by setting 60-90 °C as the initial temperature and then performing a temperature decrease at a rate of less than 25 °C / min.

[0096] The stage (S50) above can comprise a cleaning liquid cleaning stage (S50-1) and a clean water cleaning stage (S50-2).

[0097] There can be a time interval of more than 5 minutes between the cleaning liquid cleaning stage (S50-1) and the clean water cleaning stage (S50-2) for allowing the cleaning liquid to dry completely.

Claims

1. A method of manufacturing a transparent orthodontic device comprising the following stages, satisfying the following conditions: a stage of manufacturing an orthodontic device by using a transparent orthodontic device molding composition as a raw material through a 3D printing technique (S10); a stage of removing un-solidified resin and liquid from the orthodontic device obtained in the above stage (S10) (S20); a stage of performing post-solidification on the orthodontic device obtained in the above stage (S20) (S30); a stage of performing post-heat treatment on the orthodontic device obtained in the above stage (S30) (S40); a stage of performing cleaning on the orthodontic device obtained in the above stage (S40) (S50), the above stage (S20) is performed by spraying compressed air of 5 to 12 bar onto the orthodontic device, the above stage (S30) is performed at a temperature condition of 60 to 90°C, the above stage (S40) is performed by setting 60 to 90°C as a starting temperature and then performing temperature decrease at a rate of less than 25°C / min, the above stage (S50) comprises a cleaning liquid cleaning stage (S50-1) and a clean water cleaning stage (S50-2), there is a time interval of more than 5 minutes between the above cleaning liquid cleaning stage (S50-1) and the above clean water cleaning stage (S50-2) for completely drying the cleaning liquid.

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