WO2022124509A1 - Transparent orthodontic appliance having increased correctability - Google Patents

Abstract

The present invention relates to a transparent orthodontic appliance having increased correctability, the transparent orthodontic appliance made to be patient-specific by means of 3D printing. In order to increase the correctability of teeth, a laminate having concavities and convexities engraved therein is adhered to the teeth, and the transparent orthodontic appliance having concavities and convexities embossed thereon is provided in a position to be complementarily coupled to the concavities and convexities of the laminate. Therefore, the correctability is increased by means of the complementary coupling of the concavities and convexities between the laminate and transparent orthodontic appliance.

Description

Transparent orthodontic appliance with improved orthodontic power

The present invention relates to a transparent orthodontic device with increased orthodontic power, and more particularly, to a transparent orthodontic device that is suitable for a patient's oral structure through 3D printing, and to a transparent orthodontic device with improved orthodontic power compared to conventional transparent orthodontic devices .

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 development 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 the cause of the deterioration of the crushing function of food, interest in orthodontic treatment is increasing day by day.

Orthodontic treatment uses the property of teeth to move when they receive a certain force. 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 orthodontics is a procedure that corrects teeth by manufacturing transparent 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 an 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.

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 to ensure 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, a phenomenon in which the teeth are unintentionally tilted 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.

In addition, when rotating the teeth using the conventional transparent braces, or when straightening, pushing down, and straightening the apex, an additional attachment that can improve each orthodontic effect on the transparent braces was attached to the tooth surface and used.

The attachment is used to increase orthodontic power when orthodontic teeth are orthodontic, and there is an inconvenience of being used by attaching it to an accurate position.

That is, the surgeon who performs the procedure requires an accurate attachment, and when the attachment is attached to an incorrect position, the correction effect is deteriorated.

It is necessary to develop a product capable of reducing patient discomfort when using the conventional transparent orthodontic device and increasing the convenience of a procedure for an attachment used to increase orthodontic power.

[Prior art literature]

[Patent Literature]

(Patent Document 1) KR 10-1822151 B1

It is an object of the present invention to provide a transparent orthodontic device with increased orthodontic power.

Another object of the present invention relates to a patient-customized transparent orthodontic device using 3D printing, wherein in order to increase the orthodontic power of teeth, a laminate having intaglio concavities and convexities is attached to the teeth, and a position capable of complementarily combining with the concavities and convexities of the laminate It is provided as a transparent orthodontic appliance with embossed irregularities formed therein, and to provide a transparent orthodontic appliance in which the orthodontic power is increased by the complementary combination of irregularities between the laminate and the transparent orthodontic appliance.

Another object of the present invention is to provide a transparent orthodontic device output by 3D printing using a photocurable resin composition, to be customized to the patient's oral structure, and to be in close contact with the patient's teeth because the shape can be deformed when heat is provided An object of the present invention is to provide a transparent orthodontic appliance capable of exhibiting an orthodontic effect by being fixed and being restored to the original shape of the transparent orthodontic appliance when heat is provided to the transparent orthodontic appliance by body temperature.

In order to achieve the above object, a transparent orthodontic device with increased orthodontic power according to an embodiment of the present invention includes: a laminate that can be coupled to the front or back of the teeth; and a patient-customized transparent orthodontic device outputted by 3D printing, wherein the surface of the laminate is formed with intaglio irregularities, and the transparent orthodontic device includes the intaglio irregularities and convexities on the tooth portion at a position corresponding to the tooth to which the laminate is attached. Concave and convex embossing that can be complementary to each other are formed.

In the transparent orthodontic device, the tooth portion is thickly output in the opposite direction to the orthodontic direction based on the unevenness coupled between the laminate and the tooth portion with respect to the orthodontic direction of the tooth to be corrected, thereby increasing orthodontic force.

The laminate is adhesively attached to the front and/or back surfaces of the teeth, wherein the adhesive is a vegetable adhesive or a dental adhesive.

The transparent orthodontic device is heated to 40° C. or higher, and the shape is fixed in a form in close contact with the teeth by being inserted into the patient's teeth, and the transparent orthodontic device in close contact with the teeth is restored to its original shape by body temperature to correct the teeth. can

The transparent orthodontic device uses a photocurable composition, uses the patient's tooth structure data, and the tooth movement data according to the orthodontic position of the teeth is reflected and 3D printed.

The photocurable composition, UV-curable polyurethane oligomer represented by the following formula (1); photoinitiators; silane coupling agents; oligomers; and stabilizers:

[Formula 1]

[Formula 2]

[Formula 3]

here,

n is an integer from 1 to 1,000,

A is a compound represented by Formula 2 or Formula 3,

* means the part to be joined,

R ₁ to R ₆ are the same as or different from each other and each independently represent hydrogen, deuterium, a cyano group, a nitro group, a halogen group, a hydroxy group, a substituted or unsubstituted C1-C30 alkyl group, or a substituted or unsubstituted C1-C20 cyclo An alkyl 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, 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, A substituted or unsubstituted arylamino group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkylamino group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylamino group having 2 to 24 carbon atoms, or a substituted or unsubstituted alkylsilyl group having 1 to 30 carbon atoms , is selected from the group consisting of 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, and 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 transparent orthodontic device with increased orthodontic power according to another embodiment of the present invention comprises the steps of: 1) attaching a laminate having intaglio concavities and convexities to the front and/or back surfaces of teeth to be corrected by a patient; 2) obtaining 3D dental data by scanning the tooth structure of the patient including the laminated teeth; 3) 3D modeling the 3D tooth data; and 4) 3D printing using the patient's 3D tooth modeling data to output a transparent orthodontic device, wherein the transparent orthodontic device includes the intaglio of the tooth at a position corresponding to the tooth to which the laminate is attached. Concave-convex embossing that can be complementarily combined with the concavo-convex is formed.

The present invention relates to a patient-customized transparent orthodontic device using 3D printing. In order to increase the orthodontic power of teeth, a laminate with intaglio concavities and convexities is attached to the teeth and embossed at a position where it can be complementarily combined with the concavities and convexities of the laminate. It is provided as a transparent orthodontic appliance with irregularities, and the orthodontic force is enhanced by the complementary combination of irregularities between the laminate and the transparent orthodontic appliance.

In addition, the present invention provides a transparent orthodontic device output by 3D printing using a photocurable resin composition, is provided customized to the patient's oral structure, and can be deformed when heat is provided so that it is closely attached to the patient's teeth It is fixed, and when heat is provided to the transparent orthodontic device by body temperature, the original shape of the transparent orthodontic device is restored to exhibit an orthodontic effect.

1 is an exemplary view of use of a transparent orthodontic device according to an embodiment of the present invention.

Figure 2 is a cross-sectional view of the use state of the transparent orthodontic device according to an embodiment of the present invention.

3 is an exemplary view for increasing the orthodontic power of the transparent orthodontic apparatus according to an embodiment of the present invention.

4 is an exemplary view for increasing the orthodontic power of the transparent orthodontic apparatus according to an embodiment of the present invention.

5 is an exemplary view for increasing the orthodontic power of the transparent orthodontic apparatus according to an embodiment of the present invention.

6 is a 3D view of a transparent orthodontic apparatus according to an embodiment of the present invention.

7 is a photograph of a transparent orthodontic apparatus according to an embodiment of the present invention.

8 is a cross-sectional photograph of the transparent orthodontic device according to an embodiment of the present invention coupled to the teeth.

9 is a cross-sectional photograph of the transparent orthodontic device according to an embodiment of the present invention coupled to the teeth.

10 is related to the deviation from the teeth of the transparent orthodontic apparatus according to an embodiment of the present invention.

11 is related to the deviation from the teeth of the transparent orthodontic apparatus according to an embodiment of the present invention.

The present invention provides a laminate capable of bonding to the front or back of a tooth; and a patient-customized transparent orthodontic device outputted by 3D printing, wherein the surface of the laminate is formed with intaglio irregularities, and the transparent orthodontic device includes the intaglio irregularities and convexities on the tooth portion at a position corresponding to the tooth to which the laminate is attached. It relates to a transparent orthodontic appliance having an increased orthodontic power with embossed irregularities that can be complementary to each other.

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 several different forms and is not limited to the embodiments described herein.

A transparent orthodontic device with increased orthodontic power according to an embodiment of the present invention includes: a laminate that can be coupled to the front or back of the teeth; and a patient-customized transparent orthodontic device outputted by 3D printing, wherein the surface of the laminate is formed with intaglio irregularities, and the transparent orthodontic device includes the intaglio irregularities and convexities on the tooth portion at a position corresponding to the tooth to which the laminate is attached. Concave and convex reliefs capable of complementarily bonding may be formed.

As described above, the conventional transparent orthodontic device is used in a procedure to correct teeth while manufacturing a transparent orthodontic appliance that changes step by step from the state of the teeth before orthodontic to the state of the teeth desired for correction, and replacing the teeth with the teeth. will be.

In particular, the conventional transparent orthodontic device uses a hard material to cause pain to the patient during orthodontic treatment, and forces the teeth to be moved to the orthodontic position so that the teeth are tilted and moved. There were problems such as

Specifically, the conventional transparent orthodontic appliance is made of a hard material, so it cannot be in close contact with the teeth. As a result, the force applied to the teeth by the orthodontic appliance is partially transferred rather than uniformly transferred to the entire teeth. There were problems such as teeth tilting in the orthodontic direction rather than moving in the orthodontic direction, or the orthodontic effect was partially shown, but after the orthodontic device was removed, the teeth returned to their original position. .

The problem of such a conventional transparent orthodontic appliance is a complex problem caused by a material and a manufacturing process, and details will be described later.

On the other hand, the transparent orthodontic device of the present invention relates to a transparent orthodontic device with increased orthodontic power, and may be provided as a transparent orthodontic device with increased orthodontic power for a target tooth to be orthodontic, regardless of an orthodontic direction.

In general, it is recognized that the transparent orthodontic apparatus can move in the left and right directions with respect to the orthodontic teeth, but cannot move in the vertical direction. That is, in the case of straightening the teeth to be orthodontic, using the transparent orthodontic device, the teeth are straightened in the form of wrapping the teeth, so the correction in the left and right directions is possible, but the correction in the vertical direction is not possible.

Accordingly, there is an inconvenience of using a conventional orthodontic device when the teeth are to be straightened in the vertical direction.

The transparent orthodontic apparatus of the present invention is mainly characterized in that the orthodontic force is increased in the vertical direction as well as in the left and right directions for the teeth to be corrected by preventing such problems.

Specifically, the laminate has intaglio concavities and convexities formed therein, attaching the laminate in which the intaglio concavities and convexities are formed to the tooth to be corrected, and the embossed concavities and convexities that can be complementarily combined with the concavities and convexities of the laminate are formed therein By using the orthodontic device, it is possible to increase the orthodontic force.

1 relates to a transparent orthodontic apparatus according to an embodiment of the present invention.

More specifically, the tooth 200 is located on the gum 100 , and the laminate 300 is attached to the tooth 200 to be corrected. The surface of the laminate 300 is characterized in that the concave-convexity 310 of the intaglio is formed. The laminate 300 may be attached to the front and/or back surfaces of the teeth 200 .

The attachment position of the laminate 300 may be attached to both the front side or the back side for the target tooth 200 , and may be attached to both the front side and the back side. The attachment of the laminate 300 may be selected according to the patient's tooth structure and orthodontic needs.

After the laminate 300 is attached to the teeth, thereafter, the orthodontic treatment may be performed by inserting the transparent orthodontic device 400 to the teeth.

At this time, it is characterized in that the inside of the transparent orthodontic device 400 is formed with embossed concavities and convexities 410 that can complementarily combine with the concavities and convexities 310 formed on the surface of the laminate 300 .

The unevenness 410 formed in the transparent orthodontic device 400 and the unevenness 310 formed in the laminate 300 are complementary to each other so that the force applied by the transparent orthodontic device to the teeth can be uniformly transmitted. Thus, it is possible not only to increase the orthodontic power, but also to be used as an orthodontic device regardless of the orthodontic direction.

More specifically, FIG. 2 illustrates a cross-section for use of a transparent corrective device 400 .

The transparent orthodontic device 400 of the present invention has an embossed unevenness 410 formed therein, and the unevenness 410 is complementary to the intaglio unevenness 310 of the laminate 300 attached to the tooth 200 . can be combined with

In addition, Figures 3 to 5 relate to a method for increasing the orthodontic power of the transparent orthodontic appliance.

3 to 5 refer to a portion 420 that thickens the thickness of the transparent orthodontic device 400, and specifically, the transparent orthodontic device is between the laminate and the tooth in the orthodontic direction of the tooth to be corrected. The tooth portion is output 420 thickly in the opposite direction to the orthodontic direction based on the combined unevenness to increase the orthodontic force.

Specifically, when the thickness of the transparent orthodontic device 400 is adjusted 420 in the direction opposite to the orthodontic direction of the teeth as shown in FIGS. 3 to 5 , the embossed irregularities 410 formed inside the transparent orthodontic device 400 and The force is transmitted to the concave and convex 310 of the intaglio formed on the surface of the laminate 300, and the laminate 300 is attached to the tooth 200 to be corrected, so that the force is transmitted to the tooth 200 and corrected. Not only can the effect be increased, but it will be said that correction is possible regardless of the direction of correction.

As described above, a general transparent orthodontic appliance cannot transmit a force in an up-down direction with respect to a tooth to be orthodontic, so it is virtually impossible to straighten it in the up-down direction.

That is, the conventional transparent orthodontic apparatus scans data on a patient's tooth structure, manufactures a transparent orthodontic apparatus for each orthodontic step based on the obtained tooth structure information, and inserts it into the patient's teeth to correct it. , The conventional transparent orthodontic device can straighten teeth only in the left and right directions.

In addition, since it is impossible to intensively transmit the force by the orthodontic device to the teeth to be corrected, the correction effect can only be exhibited through the movement of the entire teeth.

This is because the conventional transparent orthodontic device is manufactured in an adjusted form so that it can be forcibly moved in the orthodontic direction of the teeth, and is inserted into the teeth, so that it is impossible to provide orthodontic force for specific teeth.

On the other hand, the transparent orthodontic device of the present invention, which is output using 3D printing, can output the transparent orthodontic device thickly in the opposite direction to the orthodontic direction, and control the orthodontic direction to a specific tooth by adjusting the thickness can do.

Specifically, for some teeth 200, a laminate 300 having an intaglio concavo-convex 310 is attached, and the embossed concavo-convex 410 that can be complementarily coupled to the tooth portion to which the laminate 300 is attached. ) outputs the transparent orthodontic device formed therein, and by outputting thickly for the direction opposite to the correction direction of the teeth 200 to be corrected based on the irregularities 310 and 410, the correction target is By applying a direct force to the teeth 200, it is possible to increase the orthodontic force as well as to adjust the orthodontic direction.

The laminate 300 is attached using an adhesive, and a vegetable adhesive or a dental adhesive may be used.

The vegetable adhesive is specifically starch adhesive or soybean adhesive, and by using the vegetable adhesive, a patient can directly attach and detach the laminate 300 to the target tooth 200 .

The vegetable adhesive is exemplified by a starch adhesive or a soybean adhesive, but is not limited to the above example, and any vegetable adhesive that can be easily purchased in the market can be used without limitation.

In the case of attaching the laminate 300 using the vegetable adhesive, only the transparent orthodontic device 400 can be used while the patient is doing external activities, and when not doing external activities, in order to intensively enhance the orthodontic effect, It is also possible to use a method of attaching the laminate 300 and inserting the transparent orthodontic appliance 400 into the teeth.

The dental adhesive is specifically an adhesive for hard tissue or an adhesive for soft tissue, more specifically, the adhesive for hard tissue is a mixture of a liquid acrylic monomer and an acrylic polymer in powder form, and the adhesive for soft tissue is a cyanoacrylate-based adhesive, but Without being limited to the examples, commonly used dental adhesives may be used without limitation.

When the laminate 300 is adhered to the target tooth 200 using the dental adhesive, it is attached at the dentist and can be removed after orthodontic treatment is completed. That is, in everyday life, orthodontic treatment proceeds in the form in which the laminate 300 is attached, and when the orthodontic treatment is completed, not only the transparent orthodontic device 400 is removed but also the laminate 300 is removed.

The transparent orthodontic device of the present invention is output by 3D printing using a photocurable composition, and unlike the conventional transparent orthodontic device, as shown in FIG. The effect is excellent.

8 is a cross-sectional view showing whether the transparent orthodontic appliance of the present invention and the conventional transparent orthodontic appliance can be positioned in close contact with the teeth when using the transparent orthodontic appliance.

The transparent orthodontic device of the present invention is manufactured by acquiring data on the patient's tooth structure and outputting it, and can be manufactured with little difference from the tooth structure to 50 to 80 μm, whereas the conventional transparent orthodontic device is As shown in FIGS. 9 and 11 , the deviation from the patient's teeth is 200 to 300 μm, and it can be seen that the orthodontic force is deteriorated due to the failure to adhere.

The transparent orthodontic appliance of the present invention is heated to 40° C. or higher, and then inserted into the patient's teeth and fixed in a form in close contact with the teeth, and the transparent orthodontic appliance in close contact with the teeth is restored to its original shape by body temperature to straighten teeth.

The transparent orthodontic device of the present invention can be deformed in shape by putting it in heated water and taking it out. When heat is applied, flexibility appears for a certain period of time, which enables deformation of the shape. Then, if you press it with your hands, the shape is transformed into a form that adheres to the teeth.

Thereafter, when heat is provided to the transparent orthodontic appliance by body temperature in the oral cavity, the original output form is restored.

That is, after being immersed in water at 60 to 100° C., inserted into the teeth, and transformed into the same shape as the teeth, the transparent orthodontic device of the present invention is deformed in shape to match the tooth structure of the current patient, and then When heat is provided by body temperature, the original output shape is gradually restored, and at this time, the transparent orthodontic appliance moves to the position to straighten the teeth by the force to restore the original shape.

That is, the conventional orthodontic device is manufactured as a transparent orthodontic device according to the position of the tooth to be corrected step by step from information obtained from the patient's tooth structure, and then inserted into the tooth to move the tooth by the nature of the hard material. . As described above, the conventional transparent orthodontic apparatus moves the teeth by the nature of the material, and a uniform force within the teeth is not provided, so that the orthodontic effect is deteriorated.

On the other hand, as described above, in the transparent orthodontic device of the present invention, when the transparent orthodontic device is first used, it is deformed to the same state as the tooth structure, but when heat is provided by body temperature, the transparent orthodontic device is originally It is restored to the shape of , and the force is transmitted to the teeth, and the force transmitted to the teeth is not the force of the material of the orthodontic device, but the generation and transmission of the force by the restoration of the shape, so that the force is uniform throughout the teeth. provided, and the teeth can be moved as a whole.

The orthodontic device of the present invention is 3D printed using a photocurable composition for a 3D printer for manufacturing the orthodontic appliance, 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]

[Formula 3]

here,

n is an integer from 1 to 1,000,

A is a compound represented by Formula 2 or Formula 3,

* means the part to be joined,

R ₁ to R ₆ are the same as or different from each other and each independently represent hydrogen, deuterium, a cyano group, a nitro group, a halogen group, a hydroxy group, a substituted or unsubstituted C 1 to C 30 alkyl group, or a substituted or unsubstituted C 1 to C 20 cyclo An alkyl 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, 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, A substituted or unsubstituted arylamino group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkylamino group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylamino group having 2 to 24 carbon atoms, a substituted or unsubstituted alkylsilyl group having 1 to 30 carbon atoms , is selected from the group consisting of 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, and 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 specifically, for UV curing, a polymer compound in which a photocurable functional group is bonded to a polyurethane oligomer, wherein the photocurable functional group includes a double bond structure between carbons in a substituent, and is photocured by the carbon-carbon double bond may exhibit oxidative action.

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 with hard properties, it can also exhibit heat-resistant properties.

As the UV-curable polyurethane oligomer includes a carbon skeleton having a hard property, it has excellent physical properties such as thermal properties, strength, elastic modulus and tensile elongation, and a 3D printed output that can be restored to its original shape by heat can do.

In addition, since the UV-curing polyurethane oligomer includes a carbon skeleton having soft properties, it is possible to prepare a 3D printed output that can be deformed in shape by an external force after heat is provided.

In general, the composition for a 3D printer may include only a carbon skeleton having a hard property in order to increase the physical properties of the 3D printed output, but may increase the physical properties of the output. 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 nature of the soft functional group can be used together, if the shape is deformed by an external force while heat is provided, the deformed shape can be fixed, and when heat is provided again, it can be restored to the original shape make it

In addition, when the composition for a 3D printer includes only a carbon skeleton having soft properties, the physical properties of the output are low, and there is a problem in that the composition for a 3D printer cannot exhibit thermal properties, strength, elastic modulus, and tensile elongation to the extent that it 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, so there was a problem that the effect of orthodontic treatment with 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.

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 the user without being limited by color.

The photoinitiator is a compound represented by the following formula (4):

[Formula 4]

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 C1-C30 alkyl group and a substituted or unsubstituted C3-C30 a cycloalkyl group,

The substituted alkyl group and the substituted cycloalkyl group are hydrogen, deuterium, cyano group, nitro group, halogen group, hydroxyl 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. A to 24 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, An alkylamino group having 1 to 30 carbon atoms, 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. 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 an 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 use range, 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 a DLP method using a 3D model, the orthodontic effect can be increased by adjusting the thickness of a specific region.

The transparent orthodontic device forms a 3D model by forming embossed concavities and convexities inside to be complementary to the concave and convex concavities and convexities formed on the surface of the laminate attached to the teeth, and the 3D model is SLA (Stereolithography Apparatus) , can be output in DLP (Digital Light Processing) method.

That is, after attaching the laminate to the teeth 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.

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.

production example

Preparation of photocurable polymer composition for 3D printer

UV curing polyurethane oligomer represented by the following formula (1); 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 and the like used in the preparation of the polymer composition were purchased and used, and the contents of the components are shown in Table 1 below.

[Formula 1]

[Formula 2]

[Formula 3]

[Formula 5]

here,

n is an integer from 1 to 1,000,

* means the part to be joined,

R1 to R6 are methyl groups,

A is selected from formula (2) or formula (3).

		S10	S20	S30	S40	S50	S60	S70	S80
oligomer	Formula 2	100	100	100	100	100	100	-	-
	Formula 3	-	-	-	-	-	-	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 1

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: ISO 20795-2

Testing Machine: Universal Testing Machine

Test speed: 5mm/min

Distance between spans: 50mm

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 Research Institute, and the specimen was provided by printing the polymer composition S10 to S80 in Table 1 as a specimen according to ISO 20795-2 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.

	S10	S20	S30	S40	S50	S60	S70	S80
The tensile strength (MPa)	46.21	47.11	47.12	49.38	50.21	47.58	51.23	52.12
Elongation (%)	36.98	37.10	37.59	38.35	39.24	37.12	39.59	40.14
modulus of elasticity (MPa)	1700	1670	1650	1730	1800	1700	1810	1880

	S10	S20	S30	S40	S50	S60	S70	S80
bending strength (MPa)	51.4	53.2	54.3	56.5	60.1	58.1	51.4	52.1
Strain (%)	10.12	10.98	10.95	11.04	11.05	10.85	12.01	12.12
modulus of elasticity (MPa)	1500	1450	1480	1550	1600	1480	1450	1530

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, elongation and strain.

Experimental Example 2

Whether shape deformation and shape restoration due to heat

Experiments were conducted on whether deformation and shape restoration due to heat for S10 to S80 were performed.

The experimental method is to change the shape by applying an external force after immersion in water at 50 to 100 ° C., and whether the deformed form is fixed, and after immersion in water between 50 to 100 ° C in the deformed form and 20 to 30 ° C conditions It was checked whether it was restored to its original form under the

After first immersing in water at 50 to 100°C, the case where the shape is not deformed by an external force or the deformed shape cannot be restored to its original shape is indicated by X, and the shape is deformed by an external force and the deformed shape is fixed After immersion in water at 50 to 100 ° C, the case where the shape was restored to its original state at 20 to 30 ° C was marked as O.

	S10	S20	S30	S40	S50	S60	S70	S80
heat deflection temperature	X	O	O	O	O	X	O	O

(unit ℃)

According to Table 4, after being put into the hot water temperature (50 to 70° C.) of a water purifier that is generally easily accessible, the shape was deformable and it was possible to fix the deformed form. If not added, it was confirmed that the original shape was restored.

Although preferred embodiments of the present invention have 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

200: teeth to be corrected

300: laminate

310: concave and convex portion of the intaglio

400: transparent orthodontic device

410: embossed irregularities

420: thick output part of the transparent orthodontic appliance

The present invention relates to a transparent orthodontic device with increased orthodontic power, and more particularly, to a transparent orthodontic device that is suitable for a patient's oral structure through 3D printing, and to a transparent orthodontic device with improved orthodontic power compared to conventional transparent orthodontic devices .

Claims (7)

1. laminates that can be bonded to the front or back of the teeth; and

   Includes a patient-specific transparent orthodontic device printed with 3D printing,

   The surface of the laminate is formed with engraved irregularities,

   The transparent orthodontic device is formed with embossed concavities and convexities that can be complementarily combined with the concave and convex concavities and convexities on the tooth portion at a position corresponding to the tooth to which the laminate is attached.

   Transparent orthodontic appliance with increased orthodontic power.
2. According to claim 1,

   The transparent orthodontic device for the correction direction of the tooth to be corrected,

   Based on the unevenness coupled between the laminate and the tooth, the tooth portion is output thickly in the opposite direction to the orthodontic direction to increase the orthodontic force.

   Transparent orthodontic appliance with increased orthodontic power.
3. According to claim 1,

   The laminate is adhesively attached to the front and/or back surfaces of the teeth;

   The adhesive is a vegetable adhesive or a dental adhesive.

   Transparent orthodontic appliance with improved orthodontic power.
4. According to claim 1,

   The transparent orthodontic device is heated to 40° C. or higher, and the shape is fixed in a form in close contact with the teeth by fitting it to the patient's teeth,

   The transparent orthodontic device in close contact with the teeth is restored to its original shape by body temperature to correct the teeth

   Transparent orthodontic appliance with improved orthodontic power.
5. According to claim 1,

   The transparent orthodontic device uses a photocurable composition,

   It uses the patient's tooth structure data, and 3D printing is performed by reflecting the tooth movement data according to the orthodontic position of the teeth.

   Transparent orthodontic appliance with improved orthodontic power.
6. 6. The method of claim 5,

   The photocurable composition,

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

   photoinitiators;

   silane coupling agents;

   oligomers; and

   containing stabilizers

   Transparent orthodontic appliances with increased orthodontic power:

   [Formula 1]

   

   [Formula 2]

   

   [Formula 3]

   

   here,

   n is an integer from 1 to 1,000,

   A is a compound represented by Formula 2 or Formula 3,

   * means the part to be joined,

   R ₁ to R ₆ are the same as or different from each other and each independently represent hydrogen, deuterium, a cyano group, a nitro group, a halogen group, a hydroxy group, a substituted or unsubstituted C1-C30 alkyl group, or a substituted or unsubstituted C1-C20 cyclo An alkyl 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, 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, A substituted or unsubstituted arylamino group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkylamino group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylamino group having 2 to 24 carbon atoms, a substituted or unsubstituted alkylsilyl group having 1 to 30 carbon atoms , is selected from the group consisting of 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.
7. 1) attaching a laminate having intaglio concavities and convexities on the front and/or back surfaces of the teeth to be corrected by the patient;

   2) obtaining 3D tooth data by scanning the tooth structure of the patient including the tooth to which the laminate is attached;

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

   4) 3D printing using the patient's 3D tooth modeling data to output a transparent orthodontic device,

   The transparent orthodontic device is formed with embossed concavities and convexities that can be complementarily coupled with the concave and convex concavities and convexities on the tooth portion at a position corresponding to the laminated tooth.

   A method of straightening teeth using a transparent orthodontic appliance with improved orthodontic power.

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