KR101518711B1 - Method for producing transparent aligner - Google Patents

Abstract

Disclosed is a method for manufacturing a transparent brace for orthodontics. The method for manufacturing a transparent brace is characterized by comprising the steps of: deciding a teeth outline model including an outline part surrounding the surface of the teeth requiring rotational orthodontics; determining rotational axis of teeth requiring rotational orthodontics; determining two points which are symmetric with respect to the rotational axis based on the rotational direction required to orthodontics requiring rotational orthodontics, and contact with the outer surface of the teeth; deciding the rotational orthodontics model for rotational orthodontics by making the outline part protrude toward the surface of the teeth and the rotational direction from the two points; and generating 3D orthodontics model data applied with the rotational orthodontics model.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for producing a transparent alignment aligner,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tooth correcting mechanism, and more particularly, to a method of manufacturing a transparent correcting apparatus.

Orthodontic treatment is widely practiced for healing or molding malocclusion. BACKGROUND ART Conventionally, a fixed calibrating device has been widely used in which a bracket is adhesively fixed to a tooth, and a wire is attached to a bracket and pulled or pushed.

In a fixed orthodontic appliance, the bracket is usually provided on the smooth outer surface of the tooth, i.e., the proximal side. Such a fixed-type orthodontic appliance is advantageous from the viewpoint of convenience in terms of effectiveness and operation, but is often avoided from the viewpoint of a patient as shown in FIG. 17 because it is unsuitable for cosmetics.

In order to solve the cosmetic problem of the above-mentioned fixed type orthodontic appliance and the inconvenience that it should always be attached, a transparent correction device (or a procedure method) such as an invisalign and a clear-aligner has been proposed have. They are all of a transparent form of orthodontic appliance and are worn in the same manner as a mouthpiece.

The former divides the process of changing between the current tooth state and the tooth state of the target into dozens of steps, forming a pocket corresponding to each step tooth shape, and then changing the stepper to wear the wearer step by step. The latter is similar to the former, but it is discriminated in that the pockets are made and worn each time while observing progress.

The procedure using the transparent correction device was developed in 1997 and is an orthodontic appliance developed by Align Technology, Inc. of the United States under the name of "Invisalign System". US Pat. No. 5,975,893 6,217,325, and the like. The "Invisalign System" cuts the teeth one by one on a computer by using a special program of three-dimensional scan data on the teeth, creates 20 to 30 pairs of models in a step-by-step manner to finally move the teeth through virtual simulation, Transparent plastic frames that can move teeth by model are made and distributed to patients.

The feature of the "Invisalign System" is that the prepared plastic frame is inserted step by step into the tooth to move the tooth to be corrected little by little to the final target point. Since the plastic frame is made of a transparent material and the appearance is not prominent, It can be a great help for the patient's daily social life, and the patient can easily remove the orthodontic device as needed.

Such a transparent correction method is a method of covering a transparent material correcting device (hereinafter referred to as a transparent correcting device) with teeth like a mouthpiece, so that the correcting device is not only visually recognized from the outside, but also removable. Because of this effect, it is widely seen as compared with other calibration methods.

However, the conventional transparent correcting apparatus is excellent in the force of pushing or pulling or pressing the teeth, but is very weak in the force of rotating the teeth, which is problematic in that it is vulnerable to the rotation correction of the teeth. Especially, the upper concave part of the tooth model gave more force to the teeth than the other parts, which made it difficult to correct the rotation of teeth.

On the other hand, in the conventional transparent correction apparatus, when the teeth are greatly distorted or the correction apparatus is tight, removal of the orthodontic apparatus is not easy and the nails are broken or the gums are damaged.

On the other hand, the conventional transparent correction device has a limitation in clear orthodontic treatment of pediatric and adolescent years because it can not secure a space in which a permanent tooth comes up just before or after a tooth decline.

On the other hand, since the conventional transparent correction device has a certain thickness, there are many cases where the tooth movement is long or the use of the long time correction device causes pain to the teeth or the correction device is worn out.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a transparent correcting apparatus which is effective for correcting the rotation of a tooth.

It is another object of the present invention to provide a method for manufacturing a transparent correcting apparatus which is easy to remove.

It is still another object of the present invention to provide a method of manufacturing a transparent correcting apparatus capable of securing a space in which a permanent tooth comes up just before or after a missing tooth is removed.

It is still another object of the present invention to provide a method of manufacturing a transparent correcting apparatus having different thicknesses.

It is still another object of the present invention to provide a transparent correction device effective for rotational correction of a tooth.

It is still another object of the present invention to provide a transparent correcting apparatus which is easy to remove.

It is still another object of the present invention to provide a transparent correction apparatus capable of securing a space in which a permanent tooth comes up immediately before or after a missing tooth is removed.

It is still another object of the present invention to provide a transparent correcting apparatus having different thicknesses.

According to another aspect of the present invention, there is provided a method of manufacturing a transparent correction device,

Providing a 3D modeled tooth model;

A process of generating 3D tooth correction model data by reflecting calibration data on a 3D modeled tooth model, a process of producing a correction tooth model using a printer, and a process of placing a synthetic resin cloth on the correction tooth model and vacuum- A method of manufacturing a transparent correction device,

The 3D tooth calibration model data generation process

Determining a calibration model having an outline surrounding the surface of the tooth requiring rotational correction;

Determining a rotation center axis of the tooth requiring the rotation correction;

Determining two points that are symmetric with respect to the rotation center axis and that are in contact with the outer surface of the tooth based on the rotation direction required for the correction of the teeth that require rotation correction and the rotation center axis; And

Projecting the contour portion toward the tooth surface side and the rotation direction at the two points to determine a calibration model for the rotation calibration;

And a control unit.

Here, it is preferable to determine a calibration model to which a second protrusion for pushing the tooth required for the extraction of the tooth in the extraction direction is applied to the lid side wall and the net side wall of the second tooth pocket hole corresponding to the tooth requiring extraction assistance.

The method may further include attaching an elliptical patch to a portion of the external gingival region of the tooth of the orthodontic tooth model prior to the step of vacuum-pressing.

Herein, the method further comprises a step of filling the tooth part of the orthodontic tooth model, which is not dented and has no permanent teeth, with the resin before the step of vacuum-pressing.

In the vacuum compression step, a plurality of transparent correction devices are manufactured by sequentially applying synthetic resin fabrics having different thicknesses.

In this case, it is preferable to apply a heat-bonding resin to the orthodontic tooth model to obtain a cover, and to perform a vacuum pressing step in a state in which the obtained cover is covered with the orthodontic tooth model.

According to an aspect of the present invention,

A mouthpiece type transparent correction apparatus for tooth correction,

An insertion correcting part formed on the corresponding tooth group by forming tooth pocket grooves corresponding to an orthodontic tooth profile of the tooth; And

A support portion extending from the insertion correcting portion to the gum;

/ RTI >

One of the tooth pocket grooves is a first tooth pocket groove corresponding to a tooth requiring rotation correction

Wherein the first tooth pocket groove comprises a lid wall and a net wall surrounding the lingual and lateral sides of the tooth requiring rotational correction,

And protrusions protruding toward the teeth, which are required to be rotated, are installed on the lid side wall and the net side wall at symmetrical positions about the rotation center axis of the teeth requiring rotational correction.

Here, it is preferable that the protruding portion is formed with a convex portion protruding toward the tooth requiring the rotation correction and a concave portion formed at the back of the convex portion, and the concave portion is filled with the solid support material.

Here, it is preferable that, when the tooth requiring the rotation correction is divided into an upper part and a lower part with reference to a middle height, the protruding part is located at the lower part of the tooth requiring the rotation correction.

Here, the transparent correction device

Further comprising a second tooth pocket groove corresponding to a tooth requiring extraction assistance,

Wherein the second tooth pocket groove comprises a lid wall and a net wall surrounding the lingual and lateral sides of the tooth requiring the extraction,

And the second side wall and the second side wall are respectively provided with second protrusions for pushing the teeth requiring the extraction of the tooth in the extraction direction.

On the other hand,

It is preferable to further include a third tooth pocket groove corresponding to a portion where the tooth is missing and the permanent tooth is to come out.

On the other hand,

And a removal handle formed on the outer gingival region of the molar portion of the support portion.

In the meantime, it is preferable that the transparent correction apparatus has a plurality of calibration apparatuses having different thicknesses.

According to the present invention, it is possible to manufacture a transparent correction apparatus effective for rotational correction of a tooth.

In addition, it is possible to provide a transparent correction device which is easy to remove even when the teeth are greatly distorted or the correction device is tight.

In addition, it is possible to provide a transparent correction device capable of securing a space in which the permanent teeth rise immediately before or after the attraction is lost.

In addition, it is possible to provide a transparent correction device that does not cause pain in the teeth even if the tooth movement is excessive or the correction device is used for a long time.

FIG. 1 is a flowchart illustrating a method of manufacturing a transparent correction apparatus according to the present invention.
2 shows an embodiment of a method of manufacturing a transparent correction device according to the present invention.
Fig. 3 is a view for explaining a method of selecting points for rotation calibration shown in Fig.
FIG. 4 shows a method of setting the points shown in FIG.
Fig. 5 shows a cross-sectional shape of the orthodontic tooth model corresponding to a tooth requiring rotation correction and a corresponding first tooth pocket groove.
6 is a flow chart illustrating a method for determining two points shown in FIG.
7 shows a cross-sectional shape of a point portion selected in the orthodontic tooth model.
Fig. 8 is a view for explaining another embodiment of the method of manufacturing a transparent correction apparatus according to the present invention.
9 is a view for explaining another embodiment of the method of manufacturing a transparent correction apparatus according to the present invention.
Fig. 10 is a view for explaining another embodiment of the method of manufacturing a transparent correction apparatus according to the present invention.
Fig. 11 shows an example of a heat-bonding resin.
Figure 12 shows the cover.
Fig. 13 shows an example of a synthetic resin.
Fig. 14 shows an example of a molded article.
15 shows a transparent correction device.
Fig. 16 shows an example of wearing a transparent correction device.
17 shows an example in which a conventional fixed calibration apparatus is mounted.

As is conventional, the transparent correction apparatus according to the present invention is a dental mouthpiece type for orthodontic treatment, in which tooth pocket grooves corresponding to an orthodontic tooth profile are formed and inserted into a corresponding tooth group, And a support extending to the gum.

The insertion correction portion is formed by lining each tooth pocket groove, and the tooth pocket groove is a transparent cover which covers the lingual side and the lateral side of the tooth. .

In addition, the transparent correction device according to the present invention includes a first tooth pocket portion corresponding to a tooth requiring rotation correction, a second tooth pocket portion corresponding to a tooth requiring an extraction aid, a portion where the tooth is missing, A corresponding third tooth pocket portion and a handle portion for helping removal of the transparent correction device.

FIG. 1 is a flowchart illustrating a method of manufacturing a transparent correction apparatus according to the present invention.

Referring to FIG. 1, a 3D modeled tooth model is provided first (s102)

The 3D modeled tooth model can be obtained by scanning the tooth plaster model with a 3D scanner.

Next, the 3D tooth model is generated by reflecting the calibration data to the 3D modeled tooth model (s104)

Specifically, the process of changing between the current tooth state and the future target tooth state is divided into several stages, and 3D tooth correction model data matching the tooth shape of each step is generated.

The generated 3D tooth correction model data is used to generate the patient's orthodontic appliance design information. Here, the design information of the orthodontic appliance is design information modeled by 3D CAD, which is provided as a 3D printer, and then the orthodontic appliance of the corresponding type is manufactured through processing.

According to the present invention, in the process of generating 3D tooth calibration model data, a 3D tooth calibration model data for forming a first tooth pocket groove corresponding to a tooth requiring rotation correction and a second tooth pocket groove corresponding to a tooth requiring extraction assistance Is generated.

FIG. 2 is a view showing one embodiment of a method of manufacturing a transparent correction apparatus according to the present invention, and is presented for explaining a method of correcting teeth requiring rotational correction.

Referring to FIG. 2, in order to rotate the tooth 202 requiring rotation correction, it is understood that two points symmetrical with respect to the rotation center of the teeth are selected and the pairing is applied in the direction to rotate.

Fig. 3 is a view for explaining a method of selecting points for rotation calibration shown in Fig.

Referring to FIG. 3, when the tooth 202 is to be rotated in the leftward direction, two points, point A on the tooth bar side and point B on the inside of the tooth, are required. It can be seen that if a pairing is made in the direction to rotate at two points (point A, point B), the tooth is forced to rotate by this pairing, resulting in rotational correction.

FIG. 4 shows a method of setting the points shown in FIG.

Referring to FIG. 4, it can be seen that the point is located below the center line of the tooth 202. Here, the centerline of the tooth refers to a virtual line having a medium height in the tooth 202 that is exposed above the gum.

If point A, point B is higher than the centerline of tooth 202, it will generate a pressing force in the downward direction as well as a pairing, thereby interfering with the orthodontic treatment. Conversely, if the point A, point B is located below the center line of the tooth 202, upward force may be generated with the pairing, but this upward force is helpful in correcting the rotation.

Here, point B is located on the side opposite to point A with respect to the rotation center axis.

Figure 5 shows a rotational correction model corresponding to teeth requiring rotational correction.

5, the rotational correction model 500 has a contour portion surrounding the tooth 202 and includes a protrusion 502 protruding toward the tooth 202 so as to push the tooth in a direction in which the tooth 202 is to be rotated , ≪ / RTI > 504) are present. At this time, the positions of the two protrusions 502 and 504 are symmetrical with respect to the axis of rotation of the teeth 202, and contact with the recessed position from the tooth surface.

On the other hand, it is preferable that the positions of the two protrusions 502 and 504 are set at positions lower than the middle of the tooth 202. If it is above the middle of the tooth, it acts as a pressing force and can interfere with the calibration.

6 is a flow chart illustrating a method for determining two points shown in FIG.

First, a tooth contour model having an outline surrounding the surface of a tooth requiring rotational correction is determined. (s602) The tooth contour model has a shape of teeth requiring rotational correction.

The rotation center axis of the tooth contour model is determined. (S604) The rotation center axis is determined in consideration of the geometrical shape of the teeth.

Based on the rotational center axis and the rotational direction required for calibration, two points (502, 504) suitable for the direction to be rotated are determined (s606), that is, symmetrical about the rotational center axis, Determine two points on the outer surface that can cause matching

The contour line is projected toward the inside of the teeth and the rotational direction at the two points to determine the rotational calibration model 500 for rotational calibration. (s608)

The tooth contour model 500 for rotation is reflected on the 3D correction tooth data (s610)

7 shows a cross-sectional shape of a point portion selected in the orthodontic tooth model. Since the tooth contour model has a shape protruding into the teeth, the corresponding correction tooth model 600 has concave recesses 602 and 604 concaved inward.

7, convex portions 702 and 704 corresponding to the two concave portions 602 and 604 of the orthodontic tooth model 600 in the transparent correction device 700 are obtained. Here, concave portions 702 'and 704' having the same shape are formed on the rear side of the convex portions 702 and 704. When the concave portions 702 'and 704' are in an empty state, the convex portion 702 may not be able to push the teeth properly due to the forces from the upper and lower portions of the concave portions 702 'and 704' .

In order to prevent this, the concave portions 702 'and 704' are filled with a solid support such as resin or wax. For example, the recesses 702 'and 704' may be filled with a semi-solid resin and then cured to form the solid support 706. Since the convex portions 702 and 704 have sufficient elasticity by the solid support member 706, the teeth can be pushed firmly and effective rotation correction can be performed.

FIG. 8 is a view for explaining another embodiment of the method of manufacturing a transparent correction apparatus according to the present invention, and is presented for explaining a method of correcting teeth requiring extraction assistance.

The method shown in Fig. 8 is for forming a second tooth pocket groove 800 that aids in tooth extraction. Referring to FIG. 8, the second protrusions 802 and 804 protruding upward are formed on the lingual and lingual sides of the tooth requiring the extraction.

That is, an extraction opening protruding upwardly protruding to assist the extraction is formed on the inner wall of the tooth pocket groove (the second tooth pocket groove in the summary of the present invention) corresponding to the tooth requiring extraction assistance, do.

The second tooth pocket groove 800 may be determined in the orthodontic tooth model generation step s106 of FIG. That is, a correction tooth model using the second tooth pocket hole 800 having the extraction assist protrusions 802 and 804 is formed. When a synthetic resin fabric is applied to the tooth model and vacuum-pressed, the extraction assist protrusions 802 and 804 The second tooth pocket hole 800 can be formed.

Specifically, as in the case of teeth requiring rotational correction, a tooth contour model having an outline portion surrounding the surface of a tooth requiring extraction assistance is determined.

In the tooth contour model, two points are determined that generate forces that push the teeth needed for extraction out into the extraction direction.

At two points, a protrusion is formed by projecting the contour of the tooth contour model in the extraction direction to determine the extraction correction model for extraction assistance.

The determined orthodontic model is applied to the 3D orthodontic tooth model.

Here, as shown in Fig. 8, it is preferable that the extraction assist projection is a "U" -shape extending in the lateral direction of the teeth requiring the extraction assistance and convex in the extraction direction.

1, a correction tooth model is prepared using the 3D printer (s106)

9 is a view for explaining another embodiment of the method of manufacturing a transparent correction apparatus according to the present invention. Referring to Fig. 9, it is shown that tooth pocket holes (third pocket holes in the summary of the present invention) corresponding to a portion in which tooth decay is lost and a permanent tooth comes out are shown.

Referring to FIG. 9, it can be seen that the portion (missing portion 304) where the unretarded teeth are still to be formed in the orthodontic tooth model 302 is molded with wax or resin. At this time, the shape to be formed is determined assuming the shape when the permanent value is generated.

Thus, when the missing tooth portion 304 is vacuum-pressed by applying a synthetic resin cloth to the orthodontic tooth model 302 formed and hardened in the form of a permanent tooth in the shape of a permanent tooth, a third tooth pocket hole corresponding to the missing tooth portion is formed .

Fig. 10 is a view for explaining another embodiment of the method of manufacturing a transparent correction apparatus according to the present invention. Referring to Fig. 10, it is shown that a knob portion is formed at the outer molar portion to facilitate detachment of the transparent correction device.

Specifically, an elliptical patch 304 is attached to the upper gingival crest of the orthodontic tooth model and the outer gingival region of the lower and upper molar teeth.

The elliptical patch 306 is for forming a handle 308 to be located at the lower part of the molar of the transparent correction device, the shape of which is the same as the contour of the handle 308. That is, the elliptical patch 306 extends from the lower end of the gum to the boundary between the gum and the teeth, and its thickness and width are preferably such that the nail tip is inserted.

A transparent correction device is fabricated using a correction tooth model to which an elliptical patch 306 is affixed.

When a synthetic resin finger is applied to the orthodontic tooth model 302 to which the elliptical patch 306 is attached and vacuum-pressed, a transparent correction device having a knob 308 formed at a portion corresponding to the elliptical patch 306 can be formed do.

The step of generating the 3D tooth calibration model data is divided into several steps, and the model is created by the various stages of simulation using the program until the desired correction tooth model is completed.

It is also desirable to generate a tooth model of various shapes by outputting a fixed tooth model set at various stages in order to obtain a desired orthodontic tooth model.

11 is applied to the orthodontic tooth model 302 to which one of the first tooth pocket holes, the second tooth pocket holes, the third tooth pocket holes and the elliptical patches or a combination thereof is applied And then heated to obtain the cover shown in Fig. 12. (s108) This cover is applied to facilitate the separation of the orthodontic tooth model and the separation when the transparent correction device is manufactured by applying the synthetic resin.

With the cover applied, the synthetic resin fabric shown in Fig. 13 is applied to the orthodontic tooth model and vacuum compression is performed to obtain a molded article as shown in Fig. The recesses 702 'and 704' of the first tooth pocket corresponding to teeth requiring rotation correction are filled with resin and cured to form a solid support 706.

Here, synthetic resins having different thicknesses are applied to obtain a set of molded articles. For example, a synthetic resin having four thicknesses such as 0.02 inch, 0.03 inch, 0.035 inch, and 0.004 inch is applied to obtain a single molded article having four different thicknesses from the same corrective tooth model.

The molded product shown in Fig. 14 is cut to obtain a pair of transparent correcting devices comprising a plurality of transparent correcting devices having different thicknesses, which are applied to the correcting treatment shown in Fig.

Fig. 16 shows a state in which a transparent correction device is worn.

In the transparent correction apparatus according to the present invention, when four transparent correction apparatuses each having a thickness of one week are used, it is relatively painful even if the amount of tooth movement is large, and the correction apparatus can be replaced one by one every week. It prevents discoloration and bad breath of the color of the affected tooth and does not wear out, so that more precise correction becomes possible.

What has been described above is only an example based on the technical idea of the present invention. Those skilled in the art will recognize that various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

202 ... teeth
306 ... patch 308 ... handle
500 ... tooth contour model
502, 504 ... concave portions 702, 704 ... protrusions
600 ... Rotating Calibration Model 800 .. Calibration Model
802, 804 ... extraction aid protrusion

Claims (12)

A method of manufacturing a transparent tooth correcting apparatus having an insertion correcting portion formed on a corresponding tooth group by forming tooth pocket grooves corresponding to an orthodontic tooth profile of a tooth, and a supporting portion extending from the insertion correcting portion to the gum,
Providing a 3D modeled tooth model;
Generating 3D tooth calibration model data by reflecting the calibration data on the 3D modeled tooth model;
Preparing a correction tooth model using the 3D tooth correction model data; And
And placing a synthetic resin cloth on the orthodontic tooth model and vacuum-pressing the same,
Here, the 3D tooth calibration model data generation process
Determining a tooth contour model having a contour portion surrounding a surface of a tooth requiring rotational correction;
Determining a rotation center axis of the tooth requiring the rotation correction;
Determining two points that are symmetric with respect to the rotation center axis and that are in contact with the outer surface of the tooth based on the rotation direction required for the correction of the teeth that require rotation correction and the rotation center axis; And
Projecting the contour portion toward the tooth surface side and the rotation direction at the two points to determine a rotation correction model for the rotation correction; And
Generating the 3D tooth calibration model data by applying the rotation correction model;
Wherein the transparent alignment device comprises a transparent substrate.
The method according to claim 1,
Determining a tooth contour model having an outline surrounding a surface of a tooth requiring extraction assistance;
A step of determining a point at which a force for pushing the teeth required to assist the extraction is generated in each of the forward and lingual surfaces of the teeth requiring extraction assistance, And
And projecting the contour portion in the extraction direction at the two points to determine an extraction correction model for helping extraction.
3. The method of claim 2,
And the contour portion is extended in the lateral direction of the tooth requiring the extraction of the tooth to protrude.
The transparent correction device manufacturing method according to claim 3, wherein the outline portion is extended in the transverse direction of the tooth requiring the extraction of the tooth, and is protruded in a convex "U &
The method according to claim 1,
And attaching an elliptical patch to the outer gum region of the molar tooth of the orthodontic tooth model prior to the vacuum compression step.
6. The method of claim 5,
A step of shaping the teeth of the orthodontic tooth model before the vacuum compression step and having no permanent teeth and forming the permanent teeth according to the shape of the permanent teeth; And
And curing the resin. ≪ Desc / Clms Page number 20 >
The method according to claim 6,
Further comprising the step of attaching an elliptical patch to the upper and lower gums of the upper and lower molars outside the molar teeth of the orthodontic tooth model orthodontic tooth model prior to the vacuum compression step.
8. The method of claim 7,
Wherein the elliptical patch extends from a lower end of the gum to a boundary line between the gum and the tooth, and its thickness and width are such that the nail tip is inserted.
[2] The method of claim 1, wherein the plurality of transparent correction devices are manufactured by sequentially applying synthetic resin fabrics having different thicknesses to the vacuum compression device.
The method according to claim 1,
Wherein the step of applying the thermocompression resin to the orthodontic tooth model to obtain a cover, and vacuum-pressing the obtained cover with the orthodontic tooth model covered with the thermocompression resin is performed prior to the vacuum compression step.
The method according to claim 1,
Wherein the step of generating the 3D tooth calibration model data comprises generating a model by a plurality of stages of simulation using a program until a desired tooth model is divided into a plurality of steps.
The method according to claim 1,
And outputting a tooth model set at various stages to obtain a desired tooth model to generate tooth models of various shapes.

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