WO2021187803A1 - Patient-customized orthodontic device using 3d printing, and orthodontic method using same - Google Patents

Abstract

The present invention relates to a patient-customized orthodontic device using 3D printing, and an orthodontic method using same. The present invention enables movement of teeth without extraction during an orthodontic treatment process, and when attachments are used to enhance an orthodontic effect, the orthodontic effect can be enhanced regardless of the positions of the attachments attached to the teeth surfaces. In addition, the present invention has excellent physical properties such as thermal properties, strength, modulus of elasticity, and tensile elongation, so as to be provided as a patient-customized orthodontic device using a 3D printer, thereby reducing the pain of a patient, increasing an orthodontic effect by being seated in a teeth structure, and enabling a choice of transparent or the same color as the teeth.

Description

Patient-customized orthodontic device using 3D printing and orthodontic method using the same

The present invention relates to a patient-customized orthodontic appliance using 3D printing and a method for orthodontic treatment using the same, and it is possible to provide a customized orthodontic appliance to the shape of a patient's teeth, a patient-customized orthodontic appliance capable of straightening teeth without extraction, and the same It relates to a method of orthodontic treatment used.

In general, non-uniform dentition, malocclusion and facial protrusion are caused by the failure of teeth and oral maxillofacial areas to grow properly in place due to abnormal growth of teeth or jawbone, bad habits affecting teeth, or heredity. The structure of the teeth and the oral cavity act as a factor determining the impression of a person, and since it is a cause of lowering the grinding function of food, interest in orthodontic treatment is increasing day by day.

Orthodontic treatment uses the property of teeth to move when a certain force is applied. The most widely used for orthodontic treatment is a fixed treatment method in which a bracket is attached to the teeth and the teeth are moved using the elasticity of orthodontic wires and rubber bands. Brackets are usually made of metal, but there is a disadvantage that is noticeable during the treatment period.

In order to solve these shortcomings, a transparent correction method has been proposed. Transparent orthodontic treatment is a procedure that straightens teeth by manufacturing transparent orthodontic braces that change step by step from the state of the teeth before orthodontic treatment to the state of the teeth desired for correction, and replacing them with the teeth.

Specifically, the procedure using a transparent orthodontic device was developed in 1997, and it is a dental orthodontic device developed by "Align Technology, Inc." of the United States under the name of "Invisalign System", and U.S. Patent No. 5,975,893 and 6,217,325 and the like are disclosed.

"Invisalign System" cuts the three-dimensional scan data of the teeth one by one on the computer using a special program, creates 20 to 30 pairs of models step by step to the position where the teeth need to move through virtual simulation, and then each For each model, a transparent plastic frame that can move teeth is produced and distributed to patients.

As a feature of the "Invisalign System", the teeth to be corrected are moved little by little to the final target point by inserting a series of plastic orthodontic devices in the form of a prepared plastic frame into the teeth step by step. Because it is not recognized, it can greatly help the orthodontic patient's daily social life, and the patient can attach and detach the orthodontic device as needed.

However, although the transparent orthodontic device has the above-described advantages compared to the above-described fixed orthodontic device using the bracket, the pain inflicted to the patient is not small.

That is, since this transparent orthodontic treatment induces tooth alignment by using a hard sheet due to the nature of the material for ensuring esthetics, the transparent orthodontic device is hard due to the nature of the hard material.

In addition, despite the many advantages of the transparent orthodontic device, it is inferior to the fixed orthodontic device. In particular, when teeth are straightened using a transparent orthodontic device, an unintentional inclination of the teeth occurs.

If the tooth incline continues, the teeth gradually lie down or, in severe cases, collide with the adjacent tooth roots, causing root absorption, and the first transparent braces do not fit. There is a problem that leads to an increase in the period of orthodontic treatment.

On the other hand, when rotating the teeth using the conventional transparent braces, or when straightening, pushing down, and straightening the teeth, an additional attachment that can improve each orthodontic effect on the transparent braces is attached to the tooth surface and used.

In the case of correcting the conventional attachment by attaching it to the tooth surface, it is necessary to accurately attach the position of the attachment coupled to the tooth surface, so that the corrective effect by the corrector can be exhibited.

That is, when the conventional transparent braces are used, the attachment of the attachment to the teeth is used to apply a direct force to the teeth to straighten the apical axis or to straighten the tooth axis. There is no choice but to limit the attachment location.

That is, by the position of the attachment, there is an inconvenience of having to precisely attach the attachment to the tooth by being influenced by the orthodontic state of the tooth.

In addition, the conventional attachment is very limited in the position to be attached to the teeth according to the orthodontic state, and in order to increase the orthodontic effect by the attachment, it has been developed and used in various forms.

However, the transparent orthodontic device and the attachment need to be precisely positioned during orthodontic treatment in order to enhance the orthodontic effect, and there is a problem in that pain is applied to the patient due to the nature of the hard material.

In order to solve the above problems, it is necessary to develop a patient-customized orthodontic device using a 3D printer.

[Prior art literature]

[Patent Literature]

(Patent Document 1) KR 10-1822151 B1

An object of the present invention is to provide a patient-customized orthodontic device using 3D printing and a method for orthodontic treatment using the same.

Another object of the present invention is to provide a patient-customized orthodontic device using 3D printing that can increase the orthodontic effect by enabling movement of teeth without extraction during orthodontic treatment and a method of orthodontic treatment using the same.

Another object of the present invention is a patient-customized orthodontic device using 3D printing that can increase the orthodontic effect regardless of the position of the attachment attached to the tooth surface of the tooth, when it is desired to increase the orthodontic effect using the attachment, and the same To provide a method of orthodontic treatment.

Another object of the present invention is to provide a patient-customized orthodontic device using a 3D printer because of its excellent thermal properties, strength, elastic modulus, and tensile elongation, and to reduce the pain of the patient and to seat the teeth in the tooth structure. An object of the present invention is to provide a patient-customized orthodontic device using 3D printing that can enhance the orthodontic effect and select transparent or the same color as the teeth, and a method of orthodontic treatment using the same.

In order to achieve the above object, a patient-customized orthodontic device using a 3D printer according to an embodiment of the present invention is a patient-customized orthodontic device using a 3D printer, and it is possible to straighten teeth without extraction in the orthodontic process. , is manufactured in a shape tailored to the patient's tooth structure, and can be moved by inserting it into the tooth.

The orthodontic appliance may exhibit an orthodontic effect without tooth extraction by moving the 17th tooth, the 27th tooth, the 37th tooth, or the 47th tooth.

In addition, the orthodontic appliance can straighten teeth 11 to 13 without extracting tooth 14, unlike the conventional transparent orthodontic device. Orthodontic treatment is possible without extraction of teeth 24, 34 or 44, which is the same position as tooth 14.

More specifically, conventionally

The orthodontic device may move the teeth by inserting the orthodontic device after forming a gap between the teeth to be moved and the teeth adjacent to the teeth.

The orthodontic device may have a partition wall that can be customized to fit a gap between a tooth to be moved and a tooth adjacent to the tooth.

The orthodontic device attaches an attachment to the surface of the tooth to be moved, and thickly prints the tooth shape in the orthodontic device corresponding to the tooth to increase the force applied to the attachment on the tooth surface to improve the tooth movement speed. can

The orthodontic device attaches an attachment to the surface of the tooth, photographing the shape of the tooth to which the attachment is attached, and 3D modeling it, based on the part to which the attachment is attached, the thickness of the tooth shape. It is modeling thickly in the direction opposite to the direction you want to move.

The orthodontic device is 3D printed using a photocurable composition for a 3D printer for manufacturing the orthodontic device, and the photocurable composition for the 3D printer includes a UV-curing polyurethane oligomer represented by the following Chemical Formula 1; photoinitiators; silane coupling agents; oligomers; and stabilizers:

[Formula 1]

[Formula 2]

here,

A and A' are a substituent represented by the above formula (2),

n, m, o, p, q and r are the same as or different from each other, and are each independently an integer from 1 to 100,

L ₁ and L ₂ are the same as or different from each other, and each independently a substituted or unsubstituted C1-C200 alkylene group, a substituted or unsubstituted C6-C200 arylene group, a substituted or unsubstituted nuclear atom number 5 to 200 heteroarylene group and a substituted or unsubstituted C3-C200 cycloalkylene group,

R ₁ to R ₈ are the same as or different from each other, and each independently hydrogen, deuterium, cyano group, nitro group, halogen group, hydroxy group, substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, substituted or unsubstituted C 1 to 20 carbon atoms A cycloalkyl group, a substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 24 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms , a substituted or unsubstituted heteroaryl group having 5 to 60 carbon atoms, a substituted or unsubstituted heteroarylalkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted alkylamino group having 1 to 30 carbon atoms , substituted or unsubstituted arylamino group having 6 to 30 carbon atoms, substituted or unsubstituted aralkylamino group having 6 to 30 carbon atoms, substituted or unsubstituted heteroarylamino group having 2 to 24 carbon atoms, substituted or unsubstituted alkylsilyl having 1 to 30 carbon atoms It is selected from the group consisting of a group, a substituted or unsubstituted arylsilyl group having 6 to 30 carbon atoms and a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms,

The substituted alkylene group, substituted arylene group, substituted heteroarylene group, substituted cycloalkylene group, substituted alkyl group, substituted cycloalkyl group, substituted alkenyl group, substituted alkynyl group, substituted aralkyl group, substituted aryl Group, substituted heteroaryl group, substituted heteroarylalkyl group, substituted alkoxy group, substituted alkylamino group, substituted arylamino group, substituted aralkylamino group, substituted heteroarylamino group, substituted alkylsilyl group, substituted aryl A silyl group and a substituted aryloxy group include hydrogen, deuterium, a cyano group, a nitro group, a halogen group, a hydroxyl group, an alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, 2 to 24 carbon atoms. of an alkynyl group, an aralkyl group having 7 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, a heteroaryl group having 5 to 60 nuclear atoms, a heteroarylalkyl group having 6 to 30 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, 1 carbon atoms A to 30 alkylamino group, an arylamino group having 6 to 30 carbon atoms, an aralkylamino group having 6 to 30 carbon atoms, a heteroarylamino group having 2 to 24 carbon atoms, an alkylsilyl group having 1 to 30 carbon atoms, an arylsilyl group having 6 to 30 carbon atoms, and It is substituted with one or more substituents selected from the group consisting of an aryloxy group having 6 to 30 carbon atoms, and when substituted with a plurality of substituents, they are the same or different from each other.

A method of orthodontic treatment using a patient-customized orthodontic device using a 3D printer according to another embodiment of the present invention includes: 1) a stripping tip between a tooth to be moved of a patient and a tooth adjacent to the tooth Forming a gap between the teeth by putting it in and moving it left and right; 2) obtaining 3D dental data by scanning the patient's teeth; 3) 3D modeling the 3D tooth data; and 4) manufacturing an orthodontic device by 3D printing using the patient's 3D tooth modeling data, wherein the orthodontic device may have a partition wall that can fit a gap between teeth.

According to the patient-customized orthodontic appliance using 3D printing of the present invention and the orthodontic method using the same, it is possible to move the teeth without extraction in the orthodontic treatment process, and if you want to increase the orthodontic effect by using the attachment, the teeth The orthodontic effect can be enhanced regardless of the position of the attachment attached to the tooth surface.

In addition, it has excellent physical properties such as thermal properties, strength, elastic modulus, and tensile elongation, so that it is provided as a customized orthodontic device using a 3D printer, thereby reducing the pain of the patient and improving the orthodontic effect by being seated in the tooth structure, It is possible to choose transparent or the same color as the teeth.

1 relates to a step of orthodontic treatment using an orthodontic device according to an embodiment of the present invention.

Figure 2 relates to a step of orthodontic treatment using an orthodontic device according to an embodiment of the present invention.

Figure 3 is an exemplary view for using the attachment of the orthodontic appliance according to an embodiment of the present invention.

4 is an exemplary view for using the attachment of the orthodontic appliance according to an embodiment of the present invention.

5 is an exemplary view for using the attachment of the orthodontic appliance according to an embodiment of the present invention.

6 is an exemplary view for increasing the spacing by inserting a partition wall between the teeth according to an embodiment of the present invention.

The present invention is a patient-customized orthodontic device using a 3D printer, which can straighten teeth without extraction in the orthodontic process, is manufactured in a shape tailored to the patient's tooth structure, and can be inserted into the teeth to move the teeth. It relates to a patient-customized orthodontic appliance using a 3D printer.

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein.

The orthodontic apparatus of the present invention can exhibit the orthodontic effect without tooth extraction by moving the 17th tooth, the 27th tooth, the 37th tooth, or the 47th tooth.

In addition, the orthodontic appliance can straighten teeth 11 to 13 without extracting tooth 14, unlike the conventional transparent orthodontic device. Orthodontic treatment is possible without extraction of teeth 24, 34 or 44, which is the same position as tooth 14.

More specifically, in the conventional transparent orthodontic device, even when tooth 14 is extracted and teeth 11 to 13 are corrected, tooth 13 may not move well and lie down.

In addition, since the conventional transparent orthodontic device cannot include the device between the teeth and the orthodontic device, it is impossible to perform a procedure for widening the tooth gap.

According to an embodiment of the orthodontic apparatus of the present invention, FIG. 1 relates to a step of orthodontic treatment using the orthodontic apparatus according to an embodiment of the present invention, and FIG. 2 is an orthodontic apparatus according to an embodiment of the present invention. It relates to the orthodontic step using, Figure 3 is an exemplary view for using the attachment of the orthodontic appliance according to an embodiment of the present invention, Figure 4 is an orthodontic appliance according to an embodiment of the present invention It is an exemplary view for using the attachment, Figure 5 is an exemplary view for using the attachment of the orthodontic appliance according to an embodiment of the present invention.

Hereinafter, the orthodontic device of the present invention will be described with reference to FIGS. 1 to 5 . However, the orthodontic appliance of the present invention and the orthodontic method using the orthodontic appliance are not limited to the following examples, and may include all ranges that can be implemented by those of ordinary skill in the art.

The orthodontic appliance and the orthodontic method using the same according to FIGS. 1 to 5 correspond to one example, and the scope of the present invention is not limited to the one example.

Orthodontic devices typically used in orthodontic appliances may be classified into labial orthodontic devices or lingual orthodontic devices depending on the location of the orthodontic devices.

A labial orthodontic appliance is a device that is attached to the front of the teeth, and a lingual orthodontic appliance is a device that is attached to the back of the teeth.

The labial orthodontic device is a standard device for orthodontic textbooks, and is the cheapest and most widely used device, but there is a problem in that the esthetic is poor due to the exposure of the bracket metal.

The lingual orthodontic device is attached to the back of the teeth to prevent the problem of poor esthetics compared to the labial orthodontic device because it is difficult to confirm the appearance, but it is relatively expensive, and there are difficulties in tongue foreign body feeling, pronunciation inaccuracy and brushing management.

As a method for solving the aesthetics of the labial orthodontic device, a method such as a ceramic orthodontic device or a self-ligation bracket is used.

Recently, in order to solve problems such as poor esthetics and inaccuracy in pronunciation of traditional orthodontic appliances, a transparent orthodontic appliance has been developed and used.

As described above, the transparent orthodontic device moves the teeth to be corrected little by little to the final target point by inserting the prepared series of plastic orthodontic devices in the form of a plastic frame into the teeth step by step, and the plastic frame is made of a transparent material and is made of a transparent material. Because it is not recognized well in the orthodontic appliance, it can greatly help the orthodontist's daily social life, and there is a great advantage over the conventional orthodontic appliance in that the patient can attach and detach the orthodontic appliance as needed. .

However, due to the nature of the material to ensure esthetics, the tooth arrangement is induced by using a hard sheet. The point is that if the device does not fit well when moving the teeth, the device cannot be seated well and it is difficult to move the teeth properly. In particular, when teeth are straightened using a transparent orthodontic device, an unintentional inclination of the teeth occurs.

The present invention can be customized to the patient's tooth structure by using 3D printing like the transparent orthodontic device, and can be manufactured as a transparent orthodontic device using a polymer composition, as well as a color similar to the tooth color. Also, it is possible to prevent a problem in which the esthetic deteriorates according to the use of the orthodontic appliance by the user.

In addition, the orthodontic device of the present invention enables the movement of teeth without extraction during orthodontic treatment process, and has excellent physical properties such as thermal properties, strength, elastic modulus and tensile elongation, so a patient-customized orthodontic device using a 3D printer can be provided to reduce the patient's pain.

In addition, in the use of the orthodontic device, even in the case of facilitating tooth movement by attaching an attachment, the orthodontic speed can be increased without being limited by the attachment position and shape of the attachment.

1 relates to a step of orthodontic treatment using an orthodontic device according to an exemplary embodiment of the present invention.

Specifically, the first step of FIG. 1 is a step of forming a gap between the tooth 210 to be corrected and the tooth 220 adjacent to the tooth.

As in the present invention, a gap may be formed using a stripping tip between the tooth 210 to be corrected and the tooth 220 adjacent to the tooth.

In order to form a gap between the teeth, even if a tool other than a stripping tip used in general is used, as long as the gap 230 can be formed between the teeth, all can be used without limitation.

When the gap 230 between the teeth is formed using the stripping tip, the partition wall 520 is inserted for the movement of the teeth 210 to enable the movement of the teeth 210 .

In general, in orthodontic treatment, molars located at the extreme ends, such as teeth 17, 27, 37 and 47, cannot be easily moved by the orthodontic device, and a stronger force must be applied to move the teeth of the molars.

On the other hand, when the partition wall 520 is inserted between the teeth 210 and 220 as in the present invention, it enables movement of the molars located at the most end, such as teeth 17, 27, 37 and 47.

In orthodontic treatment, it is difficult to move the teeth, so teeth are usually straightened after tooth extraction.

However, if the tooth 17, 27, 37 or 47, which is difficult to move, is moved using the partition wall 520 as described above, it is possible to straighten the teeth without an extraction process.

More specifically, it is possible to move the teeth by inserting the partition wall 520 into the spacing 230 between the teeth formed using stripping. The thickness of the 520 is thickened to enable the desired degree of tooth movement.

The partition wall 520 may be used by sandwiching only the partition wall 520 between the teeth, and is also formed in the orthodontic device 500 of the present invention in a manner of inserting the orthodontic device 520 to the teeth. use becomes possible.

Figure 2 relates to a step of orthodontic treatment using an orthodontic device according to an embodiment of the present invention, an example of using the attachment 400.

In general, the attachment 400 is used to increase the speed of orthodontic treatment in an orthodontic appliance, and it is a very important factor to attach the attachment 400 to the correct position on the surface of the teeth.

Since the shape of the orthodontic device cannot be changed in general, the attachment 400 must be attached to the surface of the teeth according to this, so that the orthodontic force can be increased by the attachment 400 .

That is, when the attachment position of the attachment 400 is wrong, the force for pushing the attachment 400 by the orthodontic device is weakened, and thus the force received by the teeth is weakened, the tooth according to the attachment of the attachment 400 A problem arises in which the correction effect is insufficient.

On the other hand, in the case of the present invention, the orthodontic force can be increased without being limited to the attachment position and shape of the attachment 400 .

According to FIG. 2 , the attachment 400 is attached to the surface 220 of the tooth. Thereafter, by scanning the tooth to which the attachment 400 is attached, data on the tooth structure is obtained.

The data on the tooth structure also includes information on the attachment 400 attached to the tooth surface 220 .

Based on the information on the tooth structure obtained as described above, a shape for the orthodontic appliance is manufactured through 3D modeling.

At this time, in the 3D modeling step, based on the portion where the attachment 400 is attached to the tooth surface, in the direction opposite to the direction in which the tooth is to be moved, the thickness of the tooth shape is thickly formed.

That is, in the case of moving the tooth 220 to the left with respect to the tooth shape corresponding to the tooth 220 to which the attachment 400 is attached, based on the attachment position of the attachment 400 , the tooth 220 ) in the tooth shape corresponding to the attachment 400 is modeled to form a thick right side by using the attached portion as a reference point.

As another example, when it is desired to move the tooth 220 to the right, modeling is made so that the left side is thickly formed using the part to which the attachment 400 is attached in the tooth shape corresponding to the tooth 220 as a reference point.

More specifically, Figure 3 is an exemplary view for using the attachment of the orthodontic appliance according to an embodiment of the present invention, Figure 4 is when using the attachment of the orthodontic appliance according to an embodiment of the present invention It is an exemplary view for, Figure 5 is an exemplary view for using the attachment of the orthodontic appliance according to an embodiment of the present invention.

3 is an exemplary view of the orthodontic device for moving the teeth to the right, in which a thick portion 510 is formed on the right side based on the attachment position of the attachment 400, which corresponds to the orthodontic device This is the case when you want to move your teeth to the left.

4 is a case in which the tooth is to be moved upward, and is formed 510 thickly in the downward direction with respect to the attachment 400 .

5 is a case in which the tooth is to be moved to the right, and the attachment 400 is formed to be thick in the left direction (510).

When the tooth shape is modeled thickly as described above and 3D printing is performed, the tooth shape in the orthodontic device corresponding to the tooth 220 to be moved is based on the location where the attachment 400 is located. It can be printed thickly in the direction opposite to the direction of movement.

When the orthodontic appliance is thickly printed as described above and fitted to fit the teeth, the force applied to the attachment 400 is greater than that of the orthodontic appliance having a normal thickness, thereby increasing the orthodontic speed.

The orthodontic device of the present invention is 3D printed using a photocurable composition for a 3D printer for manufacturing the orthodontic device, and the photocurable composition for the 3D printer is a UV-curing polyurethane oligomer represented by the following Chemical Formula 1; photoinitiators; silane coupling agents; oligomers; and stabilizers:

[Formula 1]

[Formula 2]

here,

A and A' are a substituent represented by the above formula (2),

n, m, o, p, q and r are the same as or different from each other, and are each independently an integer from 1 to 100,

L ₁ and L ₂ are the same as or different from each other, and each independently a substituted or unsubstituted C1-C200 alkylene group, a substituted or unsubstituted C6-C200 arylene group, a substituted or unsubstituted nuclear atom number 5 to 200 heteroarylene group and a substituted or unsubstituted C3-C200 cycloalkylene group,

R ₁ to R ₈ are the same as or different from each other, and each independently hydrogen, deuterium, cyano group, nitro group, halogen group, hydroxy group, substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, substituted or unsubstituted C 1 to 20 carbon atoms A cycloalkyl group, a substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 24 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms , a substituted or unsubstituted heteroaryl group having 5 to 60 carbon atoms, a substituted or unsubstituted heteroarylalkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted alkylamino group having 1 to 30 carbon atoms , substituted or unsubstituted arylamino group having 6 to 30 carbon atoms, substituted or unsubstituted aralkylamino group having 6 to 30 carbon atoms, substituted or unsubstituted heteroarylamino group having 2 to 24 carbon atoms, substituted or unsubstituted alkylsilyl having 1 to 30 carbon atoms It is selected from the group consisting of a group, a substituted or unsubstituted arylsilyl group having 6 to 30 carbon atoms and a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms,

The substituted alkylene group, substituted arylene group, substituted heteroarylene group, substituted cycloalkylene group, substituted alkyl group, substituted cycloalkyl group, substituted alkenyl group, substituted alkynyl group, substituted aralkyl group, substituted aryl Group, substituted heteroaryl group, substituted heteroarylalkyl group, substituted alkoxy group, substituted alkylamino group, substituted arylamino group, substituted aralkylamino group, substituted heteroarylamino group, substituted alkylsilyl group, substituted aryl A silyl group and a substituted aryloxy group include hydrogen, deuterium, a cyano group, a nitro group, a halogen group, a hydroxyl group, an alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, 2 to 24 carbon atoms. of an alkynyl group, an aralkyl group having 7 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, a heteroaryl group having 5 to 60 nuclear atoms, a heteroarylalkyl group having 6 to 30 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, 1 carbon atoms A to 30 alkylamino group, an arylamino group having 6 to 30 carbon atoms, an aralkylamino group having 6 to 30 carbon atoms, a heteroarylamino group having 2 to 24 carbon atoms, an alkylsilyl group having 1 to 30 carbon atoms, an arylsilyl group having 6 to 30 carbon atoms, and It is substituted with one or more substituents selected from the group consisting of an aryloxy group having 6 to 30 carbon atoms, and when substituted with a plurality of substituents, they are the same or different from each other.

3D printing of the present invention refers to a process of manufacturing a three-dimensional object by stacking materials using 3D digital data. In this specification, although digital light processing (DLP), Stereo Lithography Apparatus (SLA), and PolyJet methods are mainly described as 3D printing technologies, it may be understood that they are applicable to other 3D printing technologies.

The photocurable composition of the present invention refers to a polymer that is crosslinked and polymerized into a polymer network as a material that is cured by irradiation with light. In the present specification, the description is focused on UV light, but it is not limited to UV light and can be applied to other light.

The UV-curable polyurethane oligomer is a polymer having a weight average molecular weight of 10,000 to 1,000,000.

More preferably, the UV curable polyurethane oligomer is a compound represented by the following formula (4):

[Formula 4]

here,

A and A' are as defined in Formula 1,

n', m', o', p', q' and r' are the same as or different from each other, and are each independently an integer from 1 to 100,

R ₁₂ and R ₁₃ are the same as or different from each other, and each independently consists of an alkylsilyl group having 1 to 30 carbon atoms, an arylsilyl group having 6 to 30 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, and a cycloalkyl group having 1 to 20 carbon atoms. selected from the group.

More specifically, for UV curing, a polymer compound in which a photocurable functional group is bonded to a polyurethane oligomer, wherein the photocurable functional group is a substituent represented by Formula 2 above.

It includes a double bond structure between carbons in the substituent represented by Chemical Formula 2, and may exhibit a photocuring action by the carbon-carbon double bond.

In addition, the UV curing polyurethane oligomer includes a polyurethane structure as a main chain, a photocurable functional group is bonded to the polyurethane structure, and the combination of the polyurethane structure and the photocurable functional group is a soft functional group bonded to the urethane linker. A linker in which a hard functional group is bonded to a linker and a urethane linker is used.

In the case of a linker in which a soft functional group is bonded to the urethane linker, the flexible properties of the soft functional group may be used together, and the hard functional group may exhibit heat resistance.

That is, by bonding a photocurable functional group to the UV-curable polyurethane oligomer, and using a soft functional group and a hard functional group as a linker, a flexible effect can be exhibited by using a carbon skeleton having soft properties at room temperature, as well as at room temperature. By using a carbon skeleton having a hard property, it can exhibit heat-resistant properties together.

As the UV-curable polyurethane oligomer includes a carbon skeleton having a hard property, a 3D printed output having excellent thermal properties, strength, elastic modulus, and tensile elongation can be produced.

In addition, since the UV-curable polyurethane oligomer includes a carbon skeleton having a soft property, even if the original shape is deformed by use, a 3D printing output capable of restoring the shape can be manufactured.

In general, the composition for a 3D printer includes only a carbon skeleton having a hard property in order to increase the physical properties of the 3D printed output, but can increase the physical properties of the output, but on the contrary, when the shape is deformed by use, Since the shape cannot be restored, there is a problem that it cannot be used multiple times.

The composition for a 3D printer in the present invention includes a carbon skeleton having a hard property and a carbon skeleton having a soft property in the UV-curing polyurethane oligomer, and thus has excellent physical properties such as thermal properties, strength, elastic modulus and tensile elongation. In addition, since the flexible properties of the soft functional group can be used together, when the shape is deformed by use, the shape can be restored and reused.

In the case of a conventional transparent orthodontic device, a problem that does not fit the tooth structure may occur over time, even though it is an orthodontic device that fits the tooth structure due to the slight movement of the teeth or the deformation caused by the use of the orthodontic device. have.

At this time, there is a problem that the conventional transparent aligner has to be remanufactured, which inevitably causes great damage in terms of time and economics. On the other hand, in the case of the present invention, even if the shape is deformed by use, it is possible to restore the original shape when heated in the range of 40 to 80 ℃.

More specifically, in the case of the present invention, when the transparent orthodontic device whose shape has been deformed by use is placed in water at 40 to 80° C., and 5 to 10 seconds have elapsed, it can be restored to its original shape.

In general, even with hot water from a water purifier that is easily available, it is possible to restore the deformed transparent aligner to its original state.

In addition, when the composition for a 3D printer includes only a carbon skeleton having soft properties, there is a problem in that the physical properties of the output are low, and thermal properties, strength, elastic modulus, and tensile elongation cannot be exhibited to the extent that they can be used as an output.

In particular, in order to be used as an orthodontic appliance, the physical properties of the output of 3D printing must be high to exhibit the effect as an orthodontic appliance. In the case of the previous transparent orthodontic device, the physical properties were not high, and there was a problem that the orthodontic effect of the orthodontic device was insufficient. and excellent physical properties such as tensile strength of 45 to 90 Mpa, thereby exhibiting an excellent correction effect as a correction device.

Conventional transparent orthodontic devices are simply made of transparent material, which is an advantage in terms of aesthetics for users. There is a problem in that it is difficult to seat properly and the desired tooth movement is difficult, and when the transparent aligner does not fit, the transparent aligner must be remanufactured.

On the other hand, in the case of printing a transparent aligner using the photocurable composition for a 3D printer for manufacturing the transparent aligner of the present invention, the pain inflicted on the patient is smaller than that of the conventional transparent aligner, depending on the characteristics of the tough material, The device can be easily seated and has excellent physical properties, enabling desirable tooth movement, and when the orthodontic appliance is deformed, it is heated in the range of 40 to 80 ° C. to be able to restore it.

The photocurable composition of the present invention can be manufactured as a transparent orthodontic device, and can also be manufactured in the same color as the tooth color. That is, it is possible to manufacture in a shape desired by a user without being limited by color.

The photoinitiator is a compound represented by the following formula (3):

[Formula 3]

here,

X ₁ is S, O or N(R ₁₁ ),

R ₉ to R ₁₁ are the same as or different from each other, and each independently represents hydrogen, deuterium, a cyano group, a nitro group, a halogen group, a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, and a substituted or unsubstituted C 3 to 30 carbon group a cycloalkyl group,

The substituted alkyl group and the substituted cycloalkyl group are hydrogen, deuterium, cyano group, nitro group, halogen group, hydroxy group, alkyl group having 1 to 30 carbon atoms, cycloalkyl group having 1 to 20 carbon atoms, alkenyl group having 2 to 30 carbon atoms, and 2 carbon atoms. to 24 alkynyl group, C7 to C30 aralkyl group, C6 to C30 aryl group, nuclear atom 5 to 60 heteroaryl group, C6 to C30 heteroarylalkyl group, C1 to C30 alkoxy group, C1-C30 alkylamino group, C6-C30 arylamino group, C6-C30 aralkylamino group, C2-C24 hetero arylamino group, C1-C30 alkylsilyl group, C6-C30 arylsilyl It is substituted with one or more substituents selected from the group consisting of a group and an aryloxy group having 6 to 30 carbon atoms, and when substituted with a plurality of substituents, they are the same or different from each other.

More preferably, it is a compound represented by the following formula (5):

[Formula 5]

The oligomer may be selected from the group consisting of epoxy acrylate oligomer, H12 dianthane-bis-glycidyl ether (4,4'-(1-Methylethylidene)biscyclohexanol, polymer with (chloromethyl)oxirane), and mixtures thereof.

More specifically, the epoxy acrylate oligomer is more specifically a phenyl epoxy (meth) acrylate oligomer, a bisphenol A epoxy di (meth) acrylate oligomer, an aliphatic alkyl epoxy di (meth) acrylate oligomer, and an aliphatic alkyl epoxy tri (meth) One or more compounds selected from the group consisting of acrylate oligomers may be used. The oligomer may not only reduce swelling caused by the organic solvent, but also improve surface hardness, abrasion resistance, heat resistance, and the like.

The silane coupling agent is more specifically 3-methacryloxypropyltrimethoxysilane, but is not limited thereto.

The stabilizer is selected from the group consisting of 2,6-di-tert-butyl-p-cresol, diethylethanolamine, trihexylamine, hindered amine, organic phosphate, hindered phenol and mixtures thereof, more specifically as 2,6-di-tert-butyl-p-cresol.

In order to improve thermal and oxidation stability, storage stability, surface properties, flow properties and process properties, for example, conventional additives such as leveling agents, slip agents or stabilizers may be included.

The photocurable composition for a 3D printer for manufacturing the orthodontic device includes a UV-curing polyurethane oligomer, and based on 100 parts by weight of the UV-curing polyurethane oligomer, 1.5 to 15 parts by weight of a photoinitiator; 0.1 to 1.5 parts by weight of a silane coupling agent; 15 to 45 parts by weight of an oligomer; and 0.1 to 2 parts by weight of a stabilizer. When the silane coupling agent is used within the above range, compatibility with resin and adhesion strength can be improved when used for surface treatment of pigments and fillers. When the oligomer exceeds the range of use, the surface energy is increased to deteriorate the mold and resin releasability, and the surface hardness is increased to reduce the surface properties such as restoring force after stamping of the mold. In the case of the stabilizer, when used within the range of use, it is possible to reduce peripheral curing and increase strength.

The manufacturing of the orthodontic device of the present invention comprises a 3D input step of receiving 3D information on a tooth structure, and a plurality of regions with the central axis of the tooth structure as the x-axis by setting a range of interest using the 3D information. It includes a 3D model generation step of generating a plurality of 3D models, and a 3D output step of outputting the plurality of 3D models using a digital light processing (DLP) method.

The 3D output unit outputs a plurality of 3D models in a digital light processing (DLP) method. The 3D output unit can generate the entire orthodontic device in a short time by outputting each 3D model at the same time or at the same time. The 3D output unit may output the orthodontic device using the photocurable composition for a 3D printer of the present invention according to a user's setting.

As the orthodontic appliance is manufactured by outputting the 3D model using the DLP method, the thickness of a specific region may be adjusted to increase the orthodontic effect.

The transparent orthodontic device may generate a 3D model so that the attachment 400 can be positioned in a portion corresponding to the inside of the tooth, and output the 3D model in a Stereolithography Apparatus (SLA) or Digital Light Processing (DLP) method.

That is, after attaching the attachment 400 to the tooth as described above, and then creating a 3D model based on the data on the dental structural state, The correction effect can be increased by increasing the thickness in the opposite direction.

More specifically, it is possible to create a hole for indirect bonding, and to output and use a wire and a parallel device for indirect bonding.

In addition, the 3D output unit may surface-treat each boundary surface to enhance coupling between the plurality of 3D outputs corresponding to the plurality of 3D models. For example, UV treatment or heat treatment may be performed on the interface of each 3D output, but the present invention is not limited thereto. This is to facilitate bonding between neighboring 3D outputs by roughening the interface between the 3D outputs. A plurality of divided 3D printed products can be bonded through heat treatment after applying a resin to the interface.

[Preparation Example: Preparation of photocurable polymer composition for 3D printer]

UV curing polyurethane oligomer represented by the following Chemical Formula 6 or Chemical Formula 7; A photoinitiator represented by the following formula (5); 3-methacryloxypropyltrimethoxysilane; epoxy acrylate oligomers; And 2,6-di-tert-butyl-p-cresol was mixed to prepare a photocurable polymer composition for a 3D printer. The oligomers used in the preparation of the polymer composition were purchased and used, and the contents of the constituents are shown in Table 1 below.

[Formula 6]

[Formula 7]

[Formula 2]

[Formula 5]

here,

A and A' are substituents represented by the following formula (2),

n', m', o', p', q' and r' are the same as or different from each other, and are each independently an integer from 1 to 100.

	S10	S20	S30	S40	S50	S60	S70	S80
Formula 6	100	100	100	100	100	100	-	-
Formula 7	-	-	-	-	-	-	100	100
photoinitiator	One	1.5	5	10	15	20	10	15
Silane coupling agent	0.05	0.1	0.5	One	1.5	2	One	1.5
oligomer	10	15	25	30	45	50	30	45
stabilizator	0.05	0.1	0.5	One	2	3	One	2

(unit weight parts)

[Experimental example: physical property evaluation experiment]

1. Test conditions

1-1. tensile test

Test Method: ASTM D638

Testing Machine: Universal Testing Machine

Test speed: 50mm/min

Distance between grips: 115mm

Load cell: 3000N

Elasticity section: (0.05 ~ 0.25)%

Yield Point: 0.2% offset

Test environment: (23±2)℃, (50±5)% R.H.

1-2. bend test

Test Method: ASTM D790

Testing Machine: Universal Testing Machine

Test speed: 1.4mm/min

Distance between spans: 55mm

Load cell: 200N

Elasticity section: (0.05 ~ 0.25)%

Test environment: (23±2)℃, (50±5)% R.H.

1-3. heat deflection temperature

Test Method: ASTM D648

Test load: 0.45 MPa

Temperature increase rate: 2℃/min

2. Test results

The experiment was conducted by requesting the Korea Polymer Testing Institute, and the specimen was provided by printing the polymer composition S10 to S80 of Table 1 as the specimen of FIG. 1 using a 3D printer.

For S10 to S80, a tensile test and a flexural test were performed, and the results are shown in Tables 2 and 3 below. The heat deflection temperature was measured.

	S10	S20	S30	S40	S50	S60	S70	S80
maximum load (N)	1659.23	1752.34	1955.11	2224.92	2234.82	1827.21	2251.64	2244.52
tensile strength (N/m 2 )	46.21	47.11	47.12	49.38	50.21	47.58	51.23	52.12
yield strength (N/m 2 )	46.15	46.78	47.11	49.38	51.21	47.21	51.64	52.12
Elongation (%)	36.98	37.10	37.59	38.35	39.24	37.12	39.59	40.14
modulus of elasticity (N/m 2 )	1498.23	1545.54	1588.54	1621.31	1622.25	1521.54	1644.25	1646.19

	S10	S20	S30	S40	S50	S60	S70	S80
maximum load (N)	94.1	95.4	96.1	96.3	97.1	95.2	98.4	98.6
bending strength (N/m 2 )	48.4	48.9	49.2	50.3	51.2	48.1	51.8	52.1
Strain (%)	10.12	10.98	10.95	11.04	11.05	10.85	12.01	12.12
modulus of elasticity (N/m 2 )	1201.14	1204.12	1204.46	1205.74	1207.45	1201.58	1211.14	1212.44

According to the tensile test and flexural test results in Tables 2 and 3, it was confirmed that the photocurable composition of the present invention exhibited excellent tensile strength, flexural strength, elastic modulus, yield strength, elongation and strain.

The thermal deformation temperature measurement results for S10 to S80 are shown in Table 4 below.

	S10	S20	S30	S40	S50	S60	S70	S80
heat deflection temperature	32.1	52.5	57.6	60.5	62.1	92.6	56.2	57.4

(unit ℃)

According to Table 4, even in the thermal deformation temperature range, it was confirmed that deformation occurred at the hot water temperature (50 to 70° C.) of the water purifier, which is generally easily accessible, and it was confirmed that the shape restoration was easy.

Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the

Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the

100: gum

210: tooth 17

220: tooth 16

300: stripping tip

400: attachment

500: orthodontic appliance

510: thick shape part in the orthodontic appliance

520: partition wall in orthodontic appliance

The present invention relates to a patient-customized orthodontic appliance using 3D printing and a method for orthodontic treatment using the same, and it is possible to provide a customized orthodontic appliance to the shape of a patient's teeth, a patient-customized orthodontic appliance capable of straightening teeth without extraction, and the same It relates to a method of orthodontic treatment used.

Claims (8)

1. Using a 3D printer, a patient-customized orthodontic appliance,

   It is possible to straighten teeth without extraction during the orthodontic process,

   It is manufactured in a shape tailored to the patient's tooth structure, and can be moved by inserting it into the tooth.

   A patient-customized orthodontic appliance using a 3D printer.
2. According to claim 1,

   The orthodontic appliance,

   By moving the 17th, 27th, 37th, or 47th teeth, it is possible to show the orthodontic effect without tooth extraction.

   A patient-customized orthodontic appliance using a 3D printer.
3. According to claim 1,

   The orthodontic appliance,

   After forming a gap with the tooth to be moved and the tooth adjacent to the tooth, inserting the orthodontic device to move the tooth

   A patient-customized orthodontic appliance using a 3D printer.
4. According to claim 1,

   The orthodontic appliance,

   A partition wall is formed therein that can be customized to fit the gap between the tooth to be moved and the teeth adjacent to the tooth.

   A patient-customized orthodontic appliance using a 3D printer.
5. According to claim 1,

   The orthodontic appliance,

   Attach the attachment to the surface of the tooth to be moved,

   By thickly printing the tooth shape in the orthodontic device corresponding to the tooth, the force applied to the attachment on the tooth surface can be increased to improve the tooth movement speed.

   A patient-customized orthodontic appliance using a 3D printer.
6. 6. The method of claim 5,

   The orthodontic appliance,

   After attaching the attachment to the surface of the tooth, photographing the shape of the tooth to which the attachment is attached, and modeling it in 3D,

   Based on the part to which the attachment is attached, modeling the thickness of the tooth shape to be thick in the direction opposite to the direction in which the tooth is to be moved

   A patient-customized orthodontic appliance using a 3D printer.
7. According to claim 1,

   The orthodontic appliance,

   3D printing using a photocurable composition for a 3D printer for the manufacture of orthodontic devices,

   The photocurable composition for the 3D printer,

   UV curing polyurethane oligomer represented by the following formula (1);

   photoinitiators;

   silane coupling agents;

   oligomers; and

   containing stabilizers

   Patient-specific orthodontic appliances using 3D printers:

   [Formula 1]

   

   [Formula 2]

   

   here,

   A and A' are a substituent represented by the above formula (2),

   n, m, o, p, q and r are the same as or different from each other, and are each independently an integer from 1 to 100,

   L ₁ and L ₂ are the same as or different from each other, and each independently a substituted or unsubstituted C1-C200 alkylene group, a substituted or unsubstituted C6-C200 arylene group, a substituted or unsubstituted nuclear atom number 5 to 200 heteroarylene group and a substituted or unsubstituted C3-C200 cycloalkylene group,

   R ₁ to R ₈ are the same as or different from each other, and each independently hydrogen, deuterium, cyano group, nitro group, halogen group, hydroxy group, substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, substituted or unsubstituted C 1 to 20 carbon atoms A cycloalkyl group, a substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 24 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms , a substituted or unsubstituted heteroaryl group having 5 to 60 carbon atoms, a substituted or unsubstituted heteroarylalkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted alkylamino group having 1 to 30 carbon atoms , substituted or unsubstituted arylamino group having 6 to 30 carbon atoms, substituted or unsubstituted aralkylamino group having 6 to 30 carbon atoms, substituted or unsubstituted heteroarylamino group having 2 to 24 carbon atoms, substituted or unsubstituted alkylsilyl having 1 to 30 carbon atoms It is selected from the group consisting of a group, a substituted or unsubstituted arylsilyl group having 6 to 30 carbon atoms and a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms,

   The substituted alkylene group, substituted arylene group, substituted heteroarylene group, substituted cycloalkylene group, substituted alkyl group, substituted cycloalkyl group, substituted alkenyl group, substituted alkynyl group, substituted aralkyl group, substituted aryl Group, substituted heteroaryl group, substituted heteroarylalkyl group, substituted alkoxy group, substituted alkylamino group, substituted arylamino group, substituted aralkylamino group, substituted heteroarylamino group, substituted alkylsilyl group, substituted aryl A silyl group and a substituted aryloxy group include hydrogen, deuterium, a cyano group, a nitro group, a halogen group, a hydroxyl group, an alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, 2 to 24 carbon atoms. of an alkynyl group, an aralkyl group having 7 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, a heteroaryl group having 5 to 60 nuclear atoms, a heteroarylalkyl group having 6 to 30 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, 1 carbon atoms A to 30 alkylamino group, an arylamino group having 6 to 30 carbon atoms, an aralkylamino group having 6 to 30 carbon atoms, a heteroarylamino group having 2 to 24 carbon atoms, an alkylsilyl group having 1 to 30 carbon atoms, an arylsilyl group having 6 to 30 carbon atoms, and It is substituted with one or more substituents selected from the group consisting of an aryloxy group having 6 to 30 carbon atoms, and when substituted with a plurality of substituents, they are the same or different from each other.
8. 1) inserting a stripping tip between a tooth to be moved of a patient and a tooth adjacent to the tooth and moving left and right to form an interdental space;

   2) obtaining 3D dental data by scanning the patient's teeth;

   3) 3D modeling the 3D tooth data; and

   4) 3D printing using the patient's 3D tooth modeling data to manufacture an orthodontic device,

   The orthodontic device has a partition wall that can fit the gap between the teeth is formed therein

   A method of orthodontic treatment using a patient-customized orthodontic device using a 3D printer.

Images