WO2020122567A1

WO2020122567A1 - Method for reattaching teeth separated from retainer

Info

Publication number: WO2020122567A1
Application number: PCT/KR2019/017408
Authority: WO
Inventors: 김석준; 전재호
Original assignee: 주식회사 스마일캐드
Priority date: 2018-12-11
Filing date: 2019-12-10
Publication date: 2020-06-18
Also published as: KR20200071272A

Abstract

The present invention relates to a method for reattaching teeth separated from a retainer, in which by using a retainer that is produced by laser cutting a shape memory alloy, and is completely in close contact with the respective teeth without gaps due to the inclination of each tooth, the shape of curvatures of the teeth, and the interdental shape all being reflected on the basis of 3D scanned data of teeth arrangement, when a specific tooth is separated from the retainer, the separated tooth can be gradually returned to the original arrangement of teeth by using the shape-restoring property of the shape memory alloy by pressing the retainer toward the separated tooth and then reattaching the retainer.

Description

Reattachment method of teeth separated from retainer

The present invention relates to a method for reattaching a tooth separated from a retainer, and more specifically, it is manufactured by laser cutting a shape memory alloy, but based on data obtained by three-dimensional scanning of the tooth arrangement, the inclination of each tooth, the shape of the tooth flexion, and the interdental shape. As all are reflected, by using a retainer that is completely in close contact with each tooth, and when a specific tooth is removed from the retainer, press the retainer in the direction of the corresponding missing tooth and reattach to restore the shape of the shape memory alloy. It relates to a method for reattaching a tooth separated from a retainer so that a tooth that has been removed using a characteristic can gradually return to the original tooth arrangement.

In general, a retainer is a kind of dental arrangement maintenance device used for removing an orthodontic device after maintenance of an orthodontic treatment and maintaining a dental arrangement.

These retainers can be largely divided into adhesive retainers that attach to teeth and removable retainers that can be arbitrarily detached, such as mouthpieces.

Currently, most adhesive retainers use a method of attaching a triflex wire made by twisting three strands of wire to a tooth using a dental bond.

On the other hand, in the case of an adhesive retainer using a triplex wire, the patient's dental form is modeled with a material called pink alginate, and then a gypsum model is produced based on this, and the maker directly bends the triplex wire to match the curved surface of the produced gypsum model. Production.

The triplex wire manufactured in this way has the advantage of being easy to manufacture because it can be deformed, and it has the advantage of allowing a slight physiological movement when each tooth receives a force because it has some elasticity. It has a problem that the tongue is uncomfortable because it intersects the interdental concave area on the inner surface of the tooth because it is not closely adhered, and food is pinched or a plaque is formed in the concave area, causing inflammation and caries.

In addition, since the triplex wire is deformable, the dentition may be distorted, and the dentition is deformed as the broken or bent area is opened or the twisted three strands are released.

The present invention has been derived to solve the above-described problems, and is manufactured by laser cutting a shape memory alloy, but as the tooth gradient, tooth flexion shape, and interdental shape are all reflected on the basis of 3D scanning of the tooth arrangement, respectively By using a retainer that is completely in close contact with the teeth of the tooth, when a specific tooth is removed from the retainer, the retainer is pushed in the direction of the missing tooth and then reattached, so that the tooth that has been dropped using the shape restoration characteristics of the shape memory alloy It is intended to provide a method for reattaching a tooth separated from a retainer that allows the gradual return to the original tooth arrangement.

The method of reattaching a tooth separated from a retainer according to an embodiment of the present invention includes a body portion formed by laser cutting so as to adhere closely and closely to each tooth along the arrangement of the teeth. As one or more flexural protrusions are tightly adhered to the interdental (pronunciation), and attached to one side of the tooth arrangement by an adhesive, the one or more flexural protrusions are closely adhered to each interdental body, and at the same time, the body part and each tooth Measuring a retainer that is tightly attached to each other and an attachment state for each tooth and determining whether or not the tooth is missing, applying an adhesive to a space between the tooth that has been dropped from the body portion and the body portion, and the body portion has been removed. Pressing in the direction of the tooth, the step of allowing the body portion and the dropped tooth to adhere, the body portion corresponds to a shape memory alloy material, and the body portion pressed in the direction of the dropped tooth returns to its original shape It may be characterized in that the arrangement is arranged in the original arrangement state.

In one embodiment, the body portion may be characterized in that the shape memory alloy plate is laser cut, based on the three-dimensional scanning data of the tooth arrangement.

In one embodiment, the body portion may be characterized in that the shape memory alloy plate is laser cut, based on the 3D scanning data reflecting the inclination of the attachment surface formed between each tooth and the body portion.

In one embodiment, the body portion is provided on the maxillary anterior portion and the mandibular anterior portion, respectively, and the 3D scanning data includes a body portion attached to the upper anterior portion of the mandibular anterior portion while the maxillary anterior portion and the mandibular anterior portion are engaged. In order not to contact, it may be characterized in that the inclination of the attachment surface according to the attachment position and the attachment position of each body portion attached to the upper and lower anterior teeth portion is reflected.

In one embodiment, the protruding end of the bent projection may be characterized in that it is formed round.

In one embodiment, the body portion is laser cut so that the shape memory alloy plate has a cutting surface perpendicular to the upper surface based on the 3D scanning data of the tooth array, and then the front and the front side facing the tooth surface through separate processing. It can be characterized in that the opposite back surface is formed by being inclined.

In one embodiment, the body portion, after the shape-memory alloy plate is laser cut, may be characterized in that the sharp edge is rounded through a separate processing.

According to an aspect of the present invention, the shape memory alloy is laser cut, but the inclination of each tooth, the shape of the tooth flexion, and the shape of the interdental are all reflected on the basis of the three-dimensional scanning data of the tooth array. It has the advantage of being in close contact.

In addition, according to one aspect of the present invention, since it is possible to manufacture in a short period of time (for example, on the same day) after scanning, the teeth are not deformed during the period required for the manufacture and attachment of the retainer, thereby providing perfect adhesion to the teeth. It has an advantage.

In addition, according to an aspect of the present invention, by using its own characteristics of the shape memory alloy, even if a specific tooth is removed from the retainer, the dropped tooth is removed by the shape restoring force of the retainer only by attaching the missing tooth and the retainer with adhesive. It has the advantage of being able to return to a naturally even dentition.

In addition, according to one aspect of the present invention, since the tooth surface bend, tooth surface inclination, etc. can be accurately identified through the 3D scanning method, the attachment area between the tooth surface and the retainer is maximized when attaching via adhesive, thereby maintaining the strong adhesion. Have

1 is a view showing a conventional conventional triplex wire retainer and various problems caused by the retainer.

2 is a view showing the shape of the adhesive retainer 100 according to an embodiment of the present invention.

3 is a view showing a cross-section of the adhesive retainer 100 shown in FIG. 2 attached to the tooth surface.

4 is a view showing a curved projection of the adhesive retainer according to an embodiment of the present invention.

5 is a view showing a method for reattaching a tooth separated from a retainer according to the present invention in a sequence.

6 is a view showing the process of FIG. 5 in a simplified embodiment.

Hereinafter, preferred embodiments are provided to help understanding of the present invention.

However, the following examples are only provided to more easily understand the present invention, and the contents of the present invention are not limited by the examples.

Referring to Figure 1 (a), the conventional general triplex wire is applied to the retainer by twisting three strands of the triplex wire (a) and then bending the ready-made wire made of a bundle (b), hitting it through the dental bond It is used to attach to the method.

The retainer to which the triplex wire is applied has various problems as follows.

Referring to Figure 1 (b), as the triplex wire is located across the concave portion of the interdental, interference with the tongue occurs, and food and food get stuck in the concave portion, as well as inflammation and caries. It has a provoking problem.

In addition, since it is possible to deform due to the nature of the triplex wire, it has various problems such as the teeth being easily deformed as the bent portion is opened again, or the tooth angle is deformed as the three strands of wire are unwound.

2 is a view showing the shape of the adhesive retainer 100 according to an embodiment of the present invention, Figure 3 is a view showing a cross-section of the adhesive retainer 100 shown in Figure 2 attached to the tooth surface .

2 and 3, the adhesive retainer 100 according to an embodiment of the present invention is configured to include a body portion 110.

The body portion 110 closely adheres to and adheres to the teeth by a separate adhesive by closely contacting each tooth along the tooth arrangement, and the body portion 110 is a shape memory alloy plate based on 3D scanning data of the tooth arrangement Can be produced by laser cutting.

More specifically, since the body portion 110 is formed integrally by cutting a plate-shaped shape memory alloy plate by a laser cutting method, the laser-cut body portion 110 itself is perfectly aligned with the tooth arrangement. It becomes a matched form.

The 3D scanning data refers to photographing data obtained by photographing teeth of the maxilla and mandible using a 3D scanner. At this time, the 3D scanning data includes tooth arrangement, tooth shape flexion, tooth shape, interdental shape, and tooth surface gradient for each tooth. Is included.

Therefore, as the 3D scanning data is input to a separate laser cutting machine, the body portion 110 is produced through which the tooth arrangement, tooth shape bending, tooth shape, interdental shape, and tooth surface inclination are reflected through the laser cutting machine. .

Since the body portion 110 is a shape memory alloy material, even if the tooth is distorted or the teeth are deformed, the force is limited by the nature of maintaining the laser cut form of the body portion 110 at all times. Can be.

At this time, the body portion 110 is formed with one or more curved projections 111 for tight contact with each interdental (pronunciation).

The bent protrusion 111 refers to an area where a part of the body portion 110 protrudes so as to be in close contact with the recessed portion formed in the gap between the teeth adjacent to each other and the teeth.

Since the curved protrusion 110 is formed at the time of laser cutting based on the 3D scanning data, it is exactly matched to the recessed portion of the interdental without error.

In addition, in order to maximize the attachment area with the tooth surface of each tooth, the body portion 110 is laser cut by reflecting the inclination of each tooth surface.

More specifically, referring to FIG. 3, the cross section of the body portion 110 is not a rectangular shape having a vertical side as shown in FIG. 3(a), but a parallelogram shape formed to correspond to the inclination formed on the tooth surface as shown in FIG. 3(b). To take.

Therefore, since the close contact area and the attachment area between the tooth surface and the body portion 110 are maximized, the body portion 110 is not easily detached from the tooth surface by an external force such as brushing teeth, so that it can maintain a firmly attached state.

Meanwhile, the inclination of the tooth surface may not be included in the 3D scanning data. At this time, the body portion 110 does not reflect the inclination of each tooth surface during laser cutting, and may be formed through a separate additional process after laser cutting.

Specifically, since the body portion 110 is manufactured by cutting a plate-shaped shape memory alloy plate by a laser cutting method, the upper and lower surfaces of the shape memory alloy plate may be formed by reflecting the same. That is, the upper and lower surfaces of the body portion 110 may be formed to be parallel.

In addition, the front surface of the body portion 110 facing the tooth surface may be formed to be inclined through additional processing after laser cutting perpendicularly to the upper surface.

In addition, the rear surface opposite to the front surface of the body portion 110 may be formed to be inclined to be parallel to the front surface. To this end, the rear surface of the body portion 110 may be formed to be inclined through additional processing after laser cutting perpendicular to the upper surface.

Additional processing for obliquely forming the front and rear surfaces of the body portion 110 may include milling, polishing, and the like.

On the other hand, the thickness of the body portion 110 is finished manufacturing may be approximately 0.4mm. In addition, the height of the body portion 110 may be approximately 0.4 mm.

When the front and rear surfaces of the body portion 110 are formed to be inclined through additional processing, the body portion 110 may be laser cut to have a thickness of approximately 0.5 mm before further processing is performed. In addition, as the front and rear surfaces are inclined through additional processing, a thickness of approximately 0.4 mm may be formed.

Meanwhile, all corner portions of the body portion 110 may be formed to be round. For example, the corners formed on the upper and front surfaces of the body portion 110, the upper and rear surfaces, the lower and the front surfaces, and the lower and the rear surfaces may be rounded. In addition, corner portions formed at both ends of the body portion 110 may also be formed to be rounded.

To this end, after the shape memory alloy is laser cut, portions corresponding to the corners of the body portion 110 may be formed to be rounded through additional processing. At this time, additional processing may include milling, polishing, and the like.

Meanwhile, the front surface of the body portion 110 facing the tooth surface and the rear surface of the body portion 110 opposite to the front surface may be formed in a shape corresponding to each other. In this case, the bent protrusion 111 can be seen to protrude toward the interdental from the front of the body portion 110. And, the bent protrusion 111 can be seen to be recessed toward the interdental from the rear surface of the body portion 110.

On the other hand, the body portion 110 may be formed in a shape that runs smoothly as a whole, so that there are no sharp edges and valleys when viewed from above. To this end, the protruding end of the bent protrusion 111 may be formed to be round.

Referring to FIG. 4, the curved protrusion 111 may be formed such that an end protruding from the front surface of the body part 110 is rounded. Through this, it is possible to prevent the occurrence of damage due to the sharp end of the bent protrusion 111.

Correspondingly, the curved protrusion 111 may be formed to have a recessed end round from the rear surface of the body portion 110. Therefore, a thickness for securing the strength of the protruding end of the bent protrusion 111 can be secured. In addition, the risk of breaking of the bent protrusion 111 may be blocked as the recessed end of the bent protrusion 111 is sharply formed.

On the other hand, the retainer 100, the sharp edges and valleys are automatically detected by computer software, and the cutting shape can be corrected.

For example, a portion corresponding to an end of the bent protrusion 111 is automatically detected and a cutting shape is corrected based on 3D scattering data so that the end of the bent protrusion 111 has a shape that is rounded as a whole. Can be cut.

Alternatively, the retainer 100 may be formed into a shape in which sharp edges and valleys are rounded through a separate additional processing after laser cutting is performed without correction of cutting shapes for sharp edges and valleys.

Alternatively, the retainer 100 is laser cut to have a round shape by correcting the cutting shape by computer software, and sharp edges are separately cut after laser cutting is performed without correction of the cutting shape. Through the additional processing of the round paper may be formed in a shape.

For example, the bent protrusion 111 may be laser cut into a shape in which the end of the bone is rounded by correcting the cutting shape on the back side. Then, the front side edge of the bent protrusion 111 may be formed in a round shape through additional processing after being formed by laser cutting. In this case, as the end of the bone on the back side of the bent protrusion 111 is roundly cut, the thickness at which the thickness is reduced can be offset by the processing of the front edge of the bent protrusion 111.

Next, the process for reattaching the teeth separated from the retainer will be described.

5 is a view showing a method for reattaching a tooth separated from a retainer according to the present invention in a sequence, and FIG. 6 is a view showing the process of FIG. 5 as a simple embodiment.

Referring first to FIG. 5, in an embodiment of the present invention, the body portion of the retainer and the attachment state of each tooth are photographed (or measured) using a 3D scanning camera or a separate imaging means, or observed by the naked eye, and the body is based on this. It is determined whether there is a tooth missing from the wealth (S401).

In the above step, it means a state in which the specific tooth is separated from the body part as the adhesive force of the specific tooth falls while the body part 110 is firmly adhered to the tooth array through an adhesive.

Next, when the position of the tooth separated from the body portion is grasped, an additional adhesive is applied to the space between the tooth surface and the body portion of the tooth (S402).

In the above step, the body portion 110 maintains its original shape at the time of laser cutting, and only means that the adhesive is applied to the tooth surface.

Next, an external force is applied to press the body portion 110 in the tooth surface direction of the dropped tooth, and then the adhesive is cured (S403).

Accordingly, while the body portion 110 is bent so as to adhere to the tooth surface of the dropped tooth (S404), the body portion 110 gradually recovers to its original shape by the shape restoring force of the shape memory alloy. The teeth attached by the adhesive are returned to the original dentition state by the shape restoring force of the body portion 110 and aligned.

The process is briefly described with reference to FIG. 6 as follows.

First, FIG. 6(a) shows a state in which the adhesive strength of the adhesive between the third tooth and the body portion 110 is weak among the four teeth attached to the body portion 110 and the third tooth is dropped.

6(b) shows a state in which the body 110 is pressed and attached in the direction of the third tooth through an external force after the additional adhesive is applied between the body 110 and the third tooth. In this process, the body portion 110 is kept pressed in the direction of the tooth 3 at this time, but the body portion 110 is intact by its own shape restoring force as shown in FIG. 6(c). As it is restored to the shape, the third tooth is also aligned in the original dentition state to correspond to the shape of the body portion 110.

Although described above with reference to the preferred embodiments of the present invention, those skilled in the art may variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can.

According to an embodiment of the present invention, a retainer for maintaining a tooth arrangement is manufactured by laser cutting a shape memory alloy, but is produced by reflecting all of the inclination of each tooth, the shape of the tooth flexion, and the interdental shape based on the 3D scanning data of the tooth arrangement. do.

Therefore, the retainer is completely in close contact with each tooth, so that the effect of maintaining the tooth arrangement can be maximized, the manufacturing time can be significantly shortened, and the re-attachment can be easily performed by self-specification of the shape memory alloy. , Industrial availability is remarkable.

Claims

In accordance with the arrangement of the teeth, and includes a body body formed by laser cutting (Laser cutting) so as to be tightly attached to each tooth, the body portion is formed with one or more curved protrusions tightly in close contact with each interdental (pronunciation), adhesive As it is attached to one side of the tooth array by, the one or more flexural protrusions are tightly adhered to each tooth, and at the same time, the retainer to which the body and each tooth are tightly attached and the attachment state for each tooth is measured and eliminated. Determining whether a tooth;

Applying an adhesive to a space between the body part and the tooth that has been removed from the body part; And

Including the step of pressing the body portion in the direction of the dropped tooth, the body portion and the dropped tooth is adhered;

The body portion corresponds to the shape memory alloy material, characterized in that the tooth arrangement is arranged in the original arrangement state as the body portion pressed in the direction of the missing tooth is returned to the original shape, the method of reattaching the teeth separated from the retainer .
According to claim 1,

The body portion,

Based on the three-dimensional scanning data of the tooth arrangement, characterized in that the shape-memory alloy plate is laser cut, the method of reattaching the teeth separated from the retainer.
According to claim 1,

The body portion,

A method of reattaching teeth separated from a retainer, characterized in that the shape memory alloy plate is laser cut based on the 3D scanning data reflecting the inclination of the attachment surface formed between each tooth and the body.
According to claim 3,

The body portion is provided in the upper and lower anterior teeth, respectively,

The three-dimensional scanning data,

The attachment surface according to the attachment position and the attachment position of each body part attached to the maxillary anterior portion and the mandibular anterior portion, such that the upper portion of the mandibular anterior portion does not contact the body portion attached to the maxillary anterior portion while the maxillary anterior portion and the mandibular anterior portion are engaged. Characterized in that all of the inclination of the, reattachment method of the teeth separated from the retainer.
According to claim 1,

The protruding end of the bent protrusion is characterized in that formed round, the method of reattaching the teeth separated from the retainer.
According to claim 1,

The body portion,

Based on the three-dimensional scanning data of the tooth arrangement, after the shape memory alloy plate is laser cut to have a cut surface perpendicular to the upper surface, the front surface facing the tooth surface and the rear surface opposite to the front surface are formed by being inclined through separate processing. Characterized in that, the method of reattaching the teeth separated from the retainer.
According to claim 1,

The body portion,

After the shape-memory alloy plate is laser cut, a sharp edge portion is rounded and formed through a separate process to reattach the teeth separated from the retainer.