KR102350798B1 - Removable retainer - Google Patents

Abstract

Removable retainer according to an embodiment of the present invention is formed of a shape memory alloy material as one integral configuration, the front along the tooth arrangement, the front of the body portion is in close contact with the outer tooth surface of the oral cavity; and a fixing part coupled to both ends of the body part and formed in a shape corresponding to the inner periphery shape of the oral cavity to fix the body part to be in close contact with the oral cavity outer tooth surface; wherein the body part is interdental to be inserted between teeth a curved protrusion that is formed to protrude toward and is in close contact with the inner tooth surface of a plurality of teeth forming the interdental space; and a plurality of support parts whose front surfaces are attached to the tooth surfaces of each tooth outside the interdental space, wherein the curved protrusions and the front surfaces of the support parts are formed by reflecting the vertical curvature and inclination of the corresponding tooth surfaces.

Description

Removable Retainer {REMOVABLE RETAINER}

The present invention relates to a removable retainer, and more particularly, to a removable retainer having a body formed of a shape memory alloy material.

In general, a retainer (Retainer) is a type of tooth alignment maintenance device used to remove the orthodontic device after orthodontic treatment is finished and to maintain the tooth alignment.

Such a retainer can be largely divided into an adhesive retainer attached to the teeth and a removable retainer that can be arbitrarily detached like a mouthpiece.

The current removable retainer is manufactured by bending a stainless steel wire with a diameter of 0.8 to 1.0 mm on a plaster model of a tooth that has been treated. All teeth must be in close contact with the outer surface of the tooth, and the wire part is manufactured by turning the rear surface of the most rear tooth and changing the direction forward and attaching it to the roof of the mouth. In order to give the wire part elasticity, a 'U'-shaped loop should be formed on both canine parts. When the wire part is manufactured, the acrylic resin part covering the roof of the mouth needs to be formed. After fixing the wire part on the plaster model, powdered polymer and liquid monomer are alternately sprayed and mixed on the roof part.

The removable retainer manufactured in this way cannot be in perfect contact with the tooth outer surface, the wire part is deformed during attachment and detachment, and deformation due to careless use and storage due to the characteristics of the wire material may occur.

Republic of Korea Patent Publication No. 10-2014-0115520

The present invention makes it a technical solution to provide a removable retainer that is in tight contact with a plurality of teeth constituting a tooth arrangement.

The present invention has a technical solution to provide a removable retainer having a body portion formed of a single integral configuration of a shape memory alloy material.

The present invention makes it a technical solution to provide a removable retainer that can be damaged.

In order to solve the above technical problem, the removable retainer of the present invention includes a body portion formed of a shape memory alloy material as one integral configuration, the front surface of which is in close contact with the outer tooth surface of the mouth of each tooth along the tooth arrangement; and a fixing part coupled to both ends of the body part and formed in a shape corresponding to the inner periphery shape of the oral cavity to fix the body part to be in close contact with the oral cavity outer tooth surface; wherein the body part is interdental to be inserted between teeth a curved protrusion that is formed to protrude toward and is in close contact with the inner tooth surface of a plurality of teeth forming the interdental space; and a plurality of support parts whose front surfaces are attached to the tooth surfaces of each tooth outside the interdental space, wherein the curved protrusions and the front surfaces of the support parts are formed by reflecting the vertical curvature and inclination of the corresponding tooth surfaces.

In the present invention, the bent protrusion is characterized in that the front and rear thickness is formed thicker than the support portion.

In the present invention, the bent protrusion, the front and rear thickness of the protruding end is formed to be the thickest, it is characterized in that the front and rear thickness decreases to correspond to the front and rear thickness of the support portion toward both ends.

In the present invention, the curved protrusion is characterized in that the front and rear surfaces of the protruding ends are formed to be round.

In the present invention, the bent protrusion is characterized in that the width is formed to change from the bottom to the top corresponding to the interdental shape to be inserted.

In the present invention, the body portion, based on the three-dimensional scanning data of the tooth arrangement, after laser cutting a plate material of a shape memory alloy material, it is characterized in that the front and back are cut and formed.

The removable retainer according to an embodiment of the present invention can expect the following effects.

First, the removable retainer according to an embodiment of the present invention has a body portion in which the front side is in close contact with each tooth along a tooth arrangement, is coupled to both ends of the body portion, and is formed in a shape corresponding to the shape of the inner side of the mouth of the tooth arrangement, It includes a fixing portion for fixing the body portion to be in close contact with the outer tooth surface of the oral cavity. Accordingly, the removable retainer is easily detachable from the tooth arrangement.

At this time, the body portion is formed to reflect the shape of the tooth surface and the interdental shape. In particular, the body portion includes a curved protrusion protruding toward the interdental space so as to be inserted between the teeth, and a plurality of support parts in close contact with the tooth surfaces of each tooth outside the interdental space, and the curved protrusion and the front surface of the support part are curved and inclined of the corresponding tooth surfaces. is reflected and formed.

Accordingly, the body portion is in close contact with each tooth and stably, so that the problem of foreign matter being caught between the body portion and the tooth can be prevented, and the body portion is more stably in close contact with the teeth, so that the tooth arrangement is evenly and stably be able to support

Second, as the body part is formed in one integrated configuration with a shape memory alloy material, manufacturing cost and manufacturing time can be reduced, and the tooth arrangement can be stably supported by the shape restoring force of the body part due to the characteristics of the material. can And, even if the tooth arrangement is misaligned, it can be stably returned to the initial correct position.

Third, as the bent protrusion of the bent shape is formed to have a thickness greater than the front and rear thickness of the support portion, the occurrence of breakage of the bent protrusion can be effectively prevented.

And, the protruding end of the bent protrusion is formed to be round. Accordingly, damage to the protruding end can be effectively prevented, and the body portion can have better durability.

Fourth, the curved protrusion is formed to become narrower or wider upward in correspondence to the corresponding interdental shape, so that it can be stably inserted without interdental interference, and can be closely adhered to the inner surfaces of the teeth forming the interdental space. .

Fifth, it is difficult to form a curve or an inclination on the cut surface due to the nature of laser processing. However, the body part of the removable retainer according to the embodiment of the present invention is based on the three-dimensional scanning data of the tooth arrangement, after the base material is laser cut, the front and back surfaces of each tooth and the interdental shape are taken into account through additional processing. processed and formed. Accordingly, the front and back surfaces may have a shape in which the shape of the tooth surface for each tooth, the curvature and the inclination in consideration of the interdental shape are reflected.

Sixth, coupling portions to which the fixing portions are coupled are formed at both ends of the body portion. At this time, as the body part is formed by laser cutting a plate made of a shape memory alloy material, the coupling part may be integrally formed with other parts of the body part, and the fixing part may be formed in various shapes to be firmly coupled. can Accordingly, the body portion and the fixing portion may have an effect of being more firmly fixed.

1 is a view showing a state in which a removable retainer is mounted on a tooth according to an embodiment of the present invention.
2 is a plan view of a body portion of a removable retainer according to an embodiment of the present invention.
3 is a view showing a cross-section of a first portion and a second portion of the body portion in close contact with different teeth according to an embodiment of the present invention.
4 is a plan view of a bent protrusion according to an embodiment of the present invention.
5 is a front view of a bent protrusion according to an embodiment of the present invention.
6 is a view showing a second embodiment of the coupling part of the body according to the embodiment of the present invention;
7 is a view showing a third embodiment of the coupling part of the body according to the embodiment of the present invention.
8 is a flowchart illustrating a method of manufacturing a removable retainer according to an embodiment of the present invention.
9 is a flowchart specifically showing additional processing steps according to an embodiment of the present invention.
10 is a view schematically showing a manufacturing process of the removable retainer according to an embodiment of the present invention.
11 and 12 are views showing a processing operation performed in the data processing step according to an embodiment of the present invention.
13 is a view showing the shape of the base material after the laser cutting step is performed according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, it cannot be said that the spirit of the present invention is limited to the embodiments presented, and other degenerative inventions or other embodiments included within the scope of the spirit of the present invention can be easily made by addition, change, deletion, etc. of other components. can suggest

1 is a view showing a state in which a removable retainer is mounted on a tooth according to an embodiment of the present invention.

2 is a plan view of a body portion of a removable retainer according to an embodiment of the present invention.

3 is a view showing a cross-section of a first portion and a second portion of the body portion in close contact with different teeth according to an embodiment of the present invention.

4 is a plan view of a bent protrusion according to an embodiment of the present invention.

5 is a front view of a bent protrusion according to an embodiment of the present invention.

6 is a view showing a second embodiment of the coupling part of the body according to the embodiment of the present invention;

7 is a view showing a third embodiment of the coupling part of the body according to the embodiment of the present invention.

The removable retainer 1 according to the embodiment of the present invention may be configured to be mountable to the maxillary tooth arrangement, or may be configured to be mountable to the mandibular tooth arrangement.

The removable retainer 1 may include a body portion 100 and a fixing portion 200 to which both ends of the body portion 100 are coupled.

The fixing part 200 may be formed in a shape corresponding to the peripheral shape of the tooth arrangement to which the body part 100 is to be closely adhered, and may be formed in a shape corresponding to the shape of the inner oral cavity of the tooth arrangement.

The fixing part 200 is in a state in which the body part 100 is in close contact with the outer tooth surface of the oral cavity of the tooth arrangement, in contact with the inner tooth surface of the oral cavity of the tooth arrangement, and the body part 100 is in close contact with the tooth surface of each tooth It can have a function of fixing it so that it can be maintained.

The fixing part 200 may be formed of a synthetic fiber material, for example, may be formed of an acrylic material.

When the removable retainer 1 is formed to be mounted on the maxillary tooth arrangement, the fixing part 200 may be formed in a shape corresponding to the shape of the palate.

The structure of the fixing part 200 is not limited to the above-described embodiment, and may be applied to various structures applied to the conventional removable retainer.

The body part 100 may be formed to closely contact each tooth along the tooth arrangement formed by the plurality of teeth.

And, the body part 100 may be formed of a shape memory alloy material.

Therefore, the tooth arrangement can be stably maintained by the body portion 100 , and even if the tooth arrangement is distorted while the body portion 100 is in close contact, the tooth arrangement is performed by the shape restoring force of the body portion 100 . It is possible to return to this initial even tooth alignment state.

In more detail, the body part 100 may be formed to correspond to the arrangement of teeth as a whole, and may be formed to have a substantially bow shape when viewed from above. And, the body portion 100 may be formed to have a predetermined vertical height and front and rear thickness.

The body part 100 has a front surface 101 that is in close contact with the tooth surface, a rear surface 102 opposite to the front surface 101, an upper surface 103 connecting the upper ends of the front surface 101 and the rear surface 102, and a front surface 101 ) and the lower surface 104 connecting the lower end of the rear surface 102 may be formed to have.

1 to 2 , the body part 100 may include one or more support parts 110 , one or more bent protrusions 120 , a bent part 130 , and a coupling part 140 .

The support 110 may be defined as a portion in contact with the tooth surface of each tooth outside the interdental space.

The curved protrusion 120 may be defined as a portion inserted into an interdental (pronunciation) formed between adjacent teeth.

The bent portion 130 may be defined as a portion formed at both ends of the alignment portion including the support portion 110 and the bent protrusion 120 as a set, and formed to surround the outermost tooth of the tooth arrangement.

The bent portion 130 may be formed by being bent in an approximately “U” shape.

The coupling part 140 may extend from an end of the bent part 130 to form both ends of the body part 100 , and may be defined as a part coupled to the fixing part 200 .

On the other hand, the body portion 100 may be formed by reflecting the shape of the tooth surface, the interdental shape, etc. for each tooth so that the contact area with each tooth can be improved.

For example, the body part 100 may be formed by reflecting the interdental shape of the tooth arrangement, the tooth surface curvature for each tooth, the tooth surface inclination, and the like. In this case, the tooth surface curvature may include a lateral tooth surface curvature and a vertical tooth surface curvature. In addition, the tooth surface inclination may include a horizontal tooth surface inclination and a vertical tooth surface inclination.

Accordingly, the contact area between the body part 100 and the teeth is increased, so that a more stable adhesion is possible, and the body part 100 can stably support the teeth. In addition, it is possible to prevent foreign substances from being caught in the gap between the body portion 100 and the teeth.

In more detail, referring to FIG. 3 , each tooth constituting the tooth arrangement may have various tooth surface shapes, and may have curved, inclined, or vertical tooth surface shapes.

The front surface 101 of the body part 110 may be curved, inclined, or vertically formed to correspond to the shape of the tooth surface for each tooth. That is, the front surface of the support part 110 and the bent protrusion 120 and the front surface of the bent part 130 in contact with the tooth surface may be curved, inclined, or vertically formed.

In this case, when the support part 110 and the bent protrusion 120 are formed in plurality, the front surfaces of the support part 110 and the bent protrusion 120 may have different cross-sectional shapes.

Of course, even a single tooth may have various tooth surface shapes depending on the position thereof. In response, the front surfaces of the single support part 110 and the bent protrusion 120 and the bent part 130 do not have a constant cross-sectional shape. , each part may have an independent cross-sectional shape along the extension direction. That is, the body part 100 may have an independent cross-sectional shape in which each part is continuous along the extension direction.

Meanwhile, the rear surface 102 of the body part 100 may be formed in a shape corresponding to the shape of the front surface, and may be formed parallel to the front surface 101 .

On the other hand, the upper surface 103 and the lower surface 104 of the body portion 100 may also be formed in the same shape, and may be formed parallel to each other.

For example, the upper and lower surfaces of the support part 110 and the curved protrusion 120 may be formed in a horizontal planar shape as a whole. Accordingly, the body part 100 may be formed in a planar shape in which at least an upper surface and a lower surface of the alignment part are horizontal.

Accordingly, the body portion 100 may be formed such that at least the alignment portion supporting the tooth arrangement has a uniform vertical height as a whole.

Referring to FIG. 3 , taking the cross-sectional shape of the support part 110 in contact with different teeth of the body part 100 as an example, as shown in FIG. When the tooth surface of the tooth is inclined downward from the front to the rear, the front of the first portion of the body part 100 corresponding thereto may be formed to be inclined downward from the front to the rear.

In addition, the rear surface of the first portion of the body portion 100 may also be formed to be inclined downwardly from the front to the rear. And, the upper surface and the lower surface of the first portion of the body portion 100 may be formed horizontally.

On the other hand, when the tooth surface of the second tooth in contact with the body portion 100 is formed vertically as shown in FIG. 3B, the front surface of the second portion of the body portion 100 corresponding thereto is vertical. can be formed.

In addition, the rear surface of the second part of the body part 100 may also be formed vertically. And, the upper surface and the lower surface of the second part of the body portion 100 may be formed horizontally.

On the other hand, the curved protrusion 120 may be formed in a shape that extends smoothly as a whole so that there are no sharp edges and valleys when viewed from above.

For example, the curved protrusion 120 may be formed so that an end protruding from the front is rounded. In addition, the curved protrusion 120 may be formed to have a rounded end recessed from the rear surface.

Accordingly, the occurrence of breakage of the bent protrusion 120 having a bent shape can be effectively prevented.

In addition, as shown in FIG. 4 , the curved protrusion 120 may be formed to have a thicker front and rear than the support 110 .

That is, the front and rear thickness H1 of the protruding end of the curved protrusion 120 may be thicker than the front and rear thickness H2 of the support 110 . In addition, the curved protrusion 120 may be formed such that the front and rear thicknesses gradually decrease to correspond to the front and rear thickness H2 of the support part 110 as it approaches the support part 110 .

At this time, the front and rear thickness H1 of the protruding end of the bent protrusion 120 may be formed to be 10% to 30% thicker than the front and rear thickness H2 of the support 110 , preferably 20 % level can be formed thicker.

For example, the body part 100 may be formed in various thicknesses according to specifications. For example, the body part 100 may be provided in 0.3mm specifications, 0.43mm specifications, 0.5mm specifications, and the like.

When the body part 100 has a specification of 0.3 mm, the front and rear thickness H2 of the support part 110 may be formed to be 0.3 mm. In addition, the front and rear thickness H1 of the protruding end of the curved protrusion 120 may be formed to be 0.36 mm.

Accordingly, by reinforcing the thickness of the bent protrusion 120 , the occurrence of breakage of the bent protrusion 120 may be more effectively prevented, and deformation of the body portion 100 may be effectively prevented.

In addition, the curved protrusion 120 may be formed to change in width from the lower side to the upper side as shown in FIG. 5 to correspond to the shape of the interdental space.

For example, the interdental formed in the maxillary tooth arrangement has a characteristic that the width increases from the lower side to the upper side.

When the removable retainer 1 is configured to be mountable to the maxillary tooth arrangement, the curved protrusion 120 may be formed to become wider from the bottom to the top. This can be seen as a structure in which the front surface of the curved protrusion 120 is formed by reflecting the inclination and curvature of the inner surface of the teeth forming the interdental space.

Accordingly, the curved protrusion 120 can be inserted without interference between the teeth, and can be closely adhered to the inner surfaces of the teeth forming the interdental space.

On the other hand, the coupling unit 140 may be fixed to one side of the outer surface of the fixing unit 200 coupled by a coupling structure. For example, the coupling part 140 and the fixing part 200 may be coupled by a hook coupling structure, or may be coupled by a protrusion and a groove coupling structure.

Alternatively, the coupling part 140 may be coupled to the fixing part 200 by an adhesive.

Alternatively, the coupling part 140 is positioned inside the fixing part 200 when the fixing part 200 is molded, so that it is embedded in the fixing part 200 and coupled to the fixing part 200 . state may be

Hereinafter, an example in which the coupling part 140 is coupled to the fixing part 200 by being embedded therein will be described in detail.

The coupling part 140 may be formed in various shapes to enable a firm coupling with the fixing part 200 .

1 to 2 , the coupling part 140 according to the first embodiment may extend from an end of the bent part 130 to a predetermined length. In addition, the extended end portion may be formed in a plate shape having a greater thickness or width than other portions.

Therefore, in a state in which the coupling part 140 is embedded in the fixing part 200 , it is possible to prevent the coupling part 140 from being separated from the inside of the fixing part 200 by the shape of the end. , it is possible to firmly fix the coupling part 140 and the fixing part 200 .

Referring to FIG. 6 , the coupling part 140 according to the second embodiment may be formed in a plate shape with an end having a thickness or a width wider than that of other parts, and has a structure in which a hole 145 is formed inside the edge. can be That is, the end of the coupling part 140 may be formed in a ring shape having a thickness or a width wider than that of other parts of the outside.

Accordingly, when the fixing part 200 is molded, the molding material of the fixing part 200 is filled in the hole 145 and hardened, thereby constraining the coupling part 140 . Accordingly, it is possible to more firmly fix the coupling part 140 and the fixing part 200 .

Referring to FIG. 6 , the coupling part 140 according to the third embodiment may be formed to have a protrusion 146 having an end portion extending in a direction crossing the portion extending from the end portion of the bent portion 140 . have.

Accordingly, more rigid fixing of the coupling portion 140 and the fixing portion 200 is possible by the locking restraint of the protrusion 146 .

In addition to the above-described embodiments, the coupling part 140 may be applied to various structures capable of more rigid fixing with the fixing part 200 , such as the end of the coupling part 140 being formed in a ring shape.

On the other hand, the body part 100 may be manufactured by further processing after the shape memory alloy material is laser cut.

In addition, the body part 100 may be manufactured by heat-treating the shape memory alloy material after laser cutting. Accordingly, the body portion 100 may have a higher hardness, and the shape may be stabilized.

And, the body portion 100 may be manufactured by polishing the surface. Accordingly, the body portion 100 may be formed to have a smoother surface, and a sharp portion may be removed to form a safe structure as a whole.

And, by coupling the manufactured body part 100 to the fixing part 200 , the manufacture of the removable retainer 1 may be completed.

Hereinafter, a method of manufacturing the removable retainer 1 according to an embodiment of the present invention will be described in detail with reference to the drawings.

8 is a flowchart illustrating a method of manufacturing a removable retainer according to an embodiment of the present invention.

9 is a flowchart specifically showing additional processing steps according to an embodiment of the present invention.

10 is a view schematically showing a manufacturing process of the removable retainer according to an embodiment of the present invention.

11 and 12 are views showing a processing operation performed in the data processing step according to an embodiment of the present invention.

13 is a view showing the shape of the base material after the laser cutting step is performed according to an embodiment of the present invention.

A method of manufacturing a removable retainer according to an embodiment of the present invention includes a data acquisition step of acquiring the scanning data of a tooth arrangement, a data processing step of processing the scanning data, a data conversion step of converting the corrected data into data for laser processing, a base material A laser cutting step of laser cutting the, an additional processing step of further processing the laser-cut base material, a body part separation step of separating the body part from the additionally processed base material, and a fixing part coupling step of combining the body part and the fixing part. can

First, 3D scanning data of a tooth arrangement may be acquired using a 3D scanning device.

In this case, the scanning data means photographing data obtained by photographing the tooth arrangement of the maxilla or the mandible to which the body part 100 is to be closely attached using a 3D camera.

The scanning data may include all of a tooth arrangement, an interdental shape formed in the tooth arrangement, tooth surface curvature and tooth surface inclination for each tooth.

The scanning data may be a file corresponding to the stl file format. [S100, data acquisition step]

After the data acquisition step, a data processing step of generating a cutting line defining a laser cutting shape for manufacturing the body part 100 based on the scanning data may be performed. The data processing step may include an overhead line generation step and an overhead line correction step. [S200, data processing stage]

After acquiring the scanning data, a position of a virtual body may be set on the scanning data, and a position of a reference plane on which the virtual body is located may be set on the scanning data.

The reference plane may be set to cross a plurality of teeth constituting the tooth arrangement, and may be set horizontally.

Thereafter, a tangent line between the outer tooth surface of the oral cavity and the reference surface of the tooth arrangement may be extracted, and a processing line for defining a laser cutting shape may be generated on the reference surface based on this. The overhead line may include a first overhead line L1 in contact with the tooth surface of the tooth arrangement and a second overhead line L2 spaced apart from the first overhead line L1.

The first overhead line L1 may be generated such that a central portion extends along the tooth surfaces and interdental surfaces of each tooth in order to define the cutting shape of the alignment part, and the interdental shape and the tooth surface shape of the tooth arrangement on the reference plane are reflected and generated. can be

In addition, the first overhead line L1 may be generated so that both sides of the center extend in a bent shape to define the cutting shape of the bent portion 130 .

In addition, the first overhead line L1 may be generated by extending in a shape corresponding to a specific shape required for both ends in order to define the cutting shape of the coupling part 140 .

In addition, after the first overhead line L1 is generated, as shown in FIG. 11 , a second overhead line L2 spaced apart from the first overhead line L1 by a predetermined interval may be generated.

The second overhead line L2 may be formed in a shape corresponding to the first overhead line L1 .

In addition, the second overhead line L2 may be spaced apart from the first overhead line L1 on the reference plane, and may be spaced apart rearward to form the front and rear thicknesses of the body part 100 .

An approximate thickness of the body part 100 may be set by the separation distance between the first overhead line L1 and the second overhead line L2 .

In addition, the shape of the end of the coupling part 140 may be set by the shape of the end of the first overhead line L1 and the second overhead line L2 .

For example, when the end of the coupling portion 140 is extended to a predetermined length from the bent portion 130 and a circular end is required, the first overhead line L1 is the cutting shape of the bent portion 130 . After extending to a predetermined length from the portion defining the , the end may be created in a semicircular shape.

In addition, an end of the second overhead line L2 corresponding to the end of the first overhead line L1 may be formed in a semicircular shape symmetrical to a semicircular shape formed at the end of the first overhead line L1 .

Accordingly, the end shape of the coupling part 140 can be manufactured in a circular shape.

On the other hand, both ends of the first overhead line L1 and the second overhead line L2 are not connected to each other, and may be generated while being spaced apart by a predetermined distance.

On the other hand, additional overhead lines may be further created according to the required shape of the body part 100 .

For example, when the end shape of the coupling part 140 is required to have a ring shape, a circular additional processing line for processing a hole at the end of the coupling part 140 may be further generated. [S210, overhead line generation step]

Meanwhile, referring to FIG. 10 , a portion corresponding to the bent protrusion 120 in the first overhead line L1 and the second overhead line L2 may be formed by processing the protruding end to be rounded. That is, the bent ends of the first overhead line L1 and the second overhead line L2 may be processed not to be sharp.

In addition, the first overhead line L1 and the second overhead line L2 may be processed so that a portion corresponding to the bent protrusion 120 is spaced apart from each other further than a portion corresponding to the support portion 110 . Accordingly, the front and rear thickness H1 of the curved protrusion 120 may be thicker than the front and rear thickness H2 of the support part 110 .

In this case, the first overhead line L1 and the second overhead line L2 may be generated to be spaced apart from each other further than the front and rear thicknesses of the body part 100 to be manufactured. Therefore, even if the thickness loss of the base material by laser cutting and additional processing occurs, the body portion 100 can be manufactured to meet the required specifications. [S220, Overhead Line Correction Step]

When the processing line correction step is completed, processing line data including data of the generated processing lines may be converted into data for laser processing.

For example, the overhead line data may be stored as two-dimensional data.

And, by utilizing a program that automatically generates a movement path of the laser cutter based on the two-dimensional data, the processing line data can be converted into data for laser processing.

The generated data for laser processing may be a two-dimensional CAD file in which the processing line data is reflected. [S300, data conversion step]

When the data conversion step is completed, the data for laser processing may be input to a laser cutter for laser processing.

And, according to the data for laser processing, the laser cutter may operate to laser cut the input base material 2 . That is, it can be seen that the laser cutter laser cuts the base material 2 based on the processing data.

In detail, the base material 2 may be provided in a flat plate shape made of a shape memory alloy material. That is, the base material 2 may be a shape memory alloy plate. For example, the base material 2 may be a Nitinol thin plate.

The laser cutter may be provided with a jig on which the base material 2 is seated and fixed. And, the base material 2 may be fixed by being seated on the jig.

The laser cutter may be given a set value before laser cutting. For example, the operator can set the setting values such as processing speed 200mm/s, processing acceleration 3000mm/s, pulse type pulse power 300w, pulse frequency 600hz, pulse time 400us, argon gas pressure 3.0mpa, etc.

After the base material 2 is input and the set value of the laser cutter is described, the operator can operate the laser cutter.

When the laser cutter is operated, the cutting of the base material 2 is made along the processing line by the laser cutter, and the body part forming part 100' having the basic shape of the body part 100 in the base material 2 is It may be formed by cutting.

On the other hand, as both ends of the first overhead line and the second overhead line are generated to be spaced apart from each other, both ends of the body portion forming part 100 ′ are not separated from the base material 2 but may be integrally connected.

In detail, as shown in FIG. 13 , both ends of the body part forming part 100 ′ are formed in a state in which they are integrally connected with the base material 2 , and parts other than both ends are physically formed with the base material 2 by laser cutting. may be formed in a separate state.

Referring to FIG. 13 , connection parts 105 ′ integrally connected to the base material 2 may be formed at both ends of the body part forming part 100 ′.

As the connecting part 105' is formed, the body part forming part 100' is not deformed by heat generated during laser cutting. And, the distortion of the body part forming part 100' due to a temperature change when the base material 2 is cooled after laser cutting can be effectively prevented.

That is, after laser cutting and cooling are completed, the body part forming part 100' can be separated from the base material 2, and the body part forming part 100' can be stably manufactured in a required shape. do.

And, as the connection part 105' is formed, additional processing to be described later of the body part forming part 100' having a thin and small size can be easily performed. [S400, laser cutting step]

After the laser cutting step is performed, an additional processing step of further processing the base material 2 on which the body portion forming part 100 ′ is formed may be performed.

In the additional processing step, mechanical processing or chemical processing may be performed so that the body part forming part 100 ′ has the final shape of the body part 100 .

For example, the additional processing step may include a heat treatment step of heat-treating the body portion forming part 100', and a shape processing step reflecting the tooth surface shape on the front and back surfaces of the body portion forming part 100'. have. In addition, the additional processing step may include a polishing step of grinding the body portion forming part 100 ′ on which the shape processing step is completed.

It should be noted that the heat treatment step, shape processing step, and polishing step are not limited to the order in which the work order is listed, and can be variously changed according to work efficiency. For example, a polishing step may be performed after the shape processing step, and a heat treatment step may be performed after the polishing step is performed. Alternatively, a heat treatment step may be performed after the shape processing step, and a polishing step may be performed after the heat treatment step.

Hereinafter, the shape processing step is performed after the heat treatment step, and the polishing step is performed after the shape processing step as an example to be described in detail.

The base material 2 on which the body part forming part 100 ′ is formed may be put into the heat treatment device 3 to be heat treated.

A method of heat-treating a plate material of a shape memory alloy is variously disclosed in the prior art, and a more detailed description thereof will be omitted.

By heat treatment, the body part forming part 100 ′ may have a higher hardness, and a shape may be stabilized. As a result, the body part 100 formed by the body part forming part 100 ′ may have a higher hardness, and the shape may be stabilized. [S510, heat treatment step]

After the heat treatment step is performed, the shape processing of the body portion forming part 100 ′ may be performed.

The shape processing may be performed by various tools and devices capable of cutting the surface of the body part forming part 100'. For example, the shape processing may be performed by a cone-shaped bur (bur, 3).

Due to the nature of laser processing, it may be difficult to form vertical curves or inclinations on the cut surface. Therefore, it is possible to process the vertical bending and inclination in consideration of the tooth surface shape for each tooth and the interdental shape on the front and back surfaces of the body part forming part 100 ′ using a cutting tool or an apparatus.

In detail, in a state in which both ends of the body part forming part 100' are connected to the base material 2, the body part forming part 100' that forms the front surface of the body part 100 using the burr The front can be machined.

In this case, the front surface of the body part forming part 100 ′ may be processed according to the tooth surface shape and the interdental shape for each tooth based on the scanning data.

For example, the portion corresponding to the curved protrusion 120 on the front surface of the body portion forming portion 100 ′ may be processed to become narrower or wider from the lower side to the upper side in consideration of the corresponding interdental shape.

In addition, a portion corresponding to a tooth whose tooth surface is inclined upward in the front of the body part forming part 100 ′ may be processed in a shape that is inclined upward in the forward direction.

In addition, a portion corresponding to a tooth whose tooth surface is inclined downwardly in the front of the body part forming part 100 ′ may be processed in a shape that is inclined downwardly in the front.

In addition, a portion corresponding to a tooth having a curved tooth surface from the front of the body portion forming unit 100 ′ may be processed into a curved shape.

On the other hand, the rear surface of the body portion forming portion 100 ' forming the rear surface of the body portion 100, at least a portion excluding a portion corresponding to the coupling portion 140 is the body portion forming portion (100') It can be machined into a shape corresponding to the front machining shape of

At this time, the back surface processing of the body part forming part 100 ′ may be performed after turning over the base material 2 .

Accordingly, the front and rear thicknesses of the support part 110 , the curved protrusion 120 , and the bent part 130 in contact with the teeth may be formed to have a constant thickness vertically. Accordingly, the body portion 100 can provide a uniform and stable tooth support. [S520, shape processing step]

After the shape processing step is performed, a polishing step of polishing the body portion forming part 100 ′ may be performed.

In the polishing step, abrasive processing of the body portion forming portion 100 ′ may be performed by various polishing tools and devices capable of polishing the surface of the body portion forming portion 100 ′.

A method of grinding a plate material of a shape memory alloy is variously disclosed in the prior art, and a detailed description thereof will be omitted.

It may be formed to have a smoother surface than the body portion 100 by the polishing process, and a sharp part may be removed to form a safe structure as a whole.

In detail, when the laser cutting is performed, a flash may be formed on the body part forming part 100 ′ by melting the base material. And, the iron thorn may be formed in the processing portion during the shape processing.

Flash, iron thorns, and corners are processed by the abrasive process, so that the surface of the body part forming part 100' can be formed more smoothly and sharp parts can be removed. [S530, grinding step]

After the additional processing step is completed, the body part forming part 100 ′ is separated from the base material 2 , and the body part 100 may be manufactured in a final shape.

Of course, after the body part forming part 100 ′ is separated, after additional processing is performed on the body part forming part 100 ′, the manufacturing of the body part 100 may be completed. For example, after the body part forming part 100 ′ is separated, the separated both ends are processed into a soft shape that is not square through abrasive processing, etc., and then the manufacturing of the body part 100 may be completed. [S600, body part separation step]

Meanwhile, when the manufacturing of the body part 100 is completed, a fixing part coupling step of coupling the coupling part 140 of the body part 100 to the fixing part 200 may be performed.

At this time, the fixing part 200 may be separately injection-molded and manufactured, and then combined with the manufactured body part 100 . Alternatively, the manufactured body part 100 is put into an injection molding process by the fixing part 200 , and the body part 100 is combined with the fixing part 200 at the same time as the fixing part 200 is manufactured. you might as well make it

Hereinafter, an example in which the body part 100 is coupled to the fixing part 200 at the same time as the manufacturing of the fixing part 200 will be described in detail.

The fixing part 200 may be manufactured by injection molding of an acrylic material. For example, the fixing part 200 may be manufactured by injecting an acrylic resin into a mold in which a molding part corresponding to the shape of the fixing part 200 is formed and then curing.

By injection molding the fixing part 200 in a state in which the manufactured body part 100 is put into the manufacturing mold of the fixing part 200, when the fixing part 200 is cured, the body part 100 and the fixing part 200 may be coupled.

At this time, the body part 100 may be firmly fixed to the fixing part 200 by the shape of the end of the coupling part 140 .

And, as the body part 100 and the fixing part 200 are coupled, the manufacture of the removable retainer 1 may be completed. [S700, fixing part bonding step]

According to the removable retainer 1 according to the embodiment of the present invention described above, the body portion 100 in close contact with the tooth arrangement is formed by reflecting the tooth surface shape and the interdental shape.

Accordingly, the body part 100 is in close contact with each tooth and stably, so that the problem of foreign matter being caught between the body part 100 and the teeth can be prevented, and the body part 100 can be attached to the teeth. It can be securely attached.

And, as the support unit 110 is formed to have a constant front and rear thickness and vertical height, it is possible to uniformly and stably support each tooth constituting the tooth arrangement. Accordingly, the effect of correcting tooth alignment can be maximized.

In addition, as the bent protrusion 120 having a bent shape is formed to have a thickness greater than the front and rear thickness of the support part 110 , the occurrence of breakage of the bent protrusion can be effectively prevented.

And, as the protruding end of the curved protrusion 120 is formed to be rounded, damage to the protruding end can be effectively prevented, and the body portion 100 can have better durability.

And, the curved protrusion 120 is formed to become narrower or wider toward the upper side in response to the corresponding interdental shape, so that it can be stably inserted without interdental interference, and to be closely adhered to the inner surfaces of the teeth forming the interdental space. be able to

And, as the coupling part 140 is formed in a shape that can be firmly coupled to the fixing part 200 by later cutting, the body part 100 and the fixing part 200 can be firmly coupled to each other. .

On the other hand, according to the method of manufacturing the removable retainer according to the embodiment of the present invention described above, the body portion 100 is formed as one integral configuration, so that the manufacturing cost of the retainer 1 can be reduced.

In addition, as the body part 100 is manufactured by laser cutting based on the three-dimensional scanning data of the tooth arrangement, the period required for manufacturing the retainer can be greatly reduced.

And, as the time required for manufacturing the retainer is shortened, deformation of the tooth arrangement is minimized during the manufacturing period of the retainer, so that the manufactured retainer and the teeth are stably matched, so that the mounting time can be minimized. Therefore, it is possible to greatly improve the patient's treatment satisfaction.

And, when the base material 2 is laser cut to form the body part forming part 100 ′, both ends of the body part forming part 100 ′ are cut while being connected to the base material 2 . Accordingly, during laser cutting, deformation of the sawing body part forming part 100 ′ due to external force or heat during an additional processing step can be prevented, and a shape defect of the body part 100 can be prevented.

In addition, it is difficult to form vertical curves or inclinations on the cut surface due to the characteristics of laser processing. However, in the method of manufacturing a removable retainer according to an embodiment of the present invention, a laser cutting line is generated based on the three-dimensional scanning data of the tooth arrangement, and then laser cutting is performed according to the processing line to define the body part forming part 100' ) to form Thereafter, the front and back surfaces of the body portion forming part 100 ′ are processed in consideration of the tooth surface shape for each tooth and the interdental shape through a separate additional processing. Accordingly, it is possible to manufacture the body portion 100 in which the vertical bending and inclination in consideration of the tooth surface shape for each tooth and the interdental shape on the front and back surfaces are reflected.

1: Removable retainer
100: body
101: front
102: back
103: upper surface
104: if
110: support
120: bent protrusion
130: bent part
140: coupling part
H1: thickness before and after bending protrusion
H2: thickness before and after support
200: fixed part
2: base material
100': body part forming part
105': connection
3: heat treatment device
4: Bur
S100: Data Acquisition Step
S200: data processing step
S210: overhead line creation step
S220: Overhead Line Correction Step
S300: Data Transformation Step
S400: laser cutting step
S500: Additional Machining Steps
S510: heat treatment step
S520: shape machining step
S530: polishing step
S600: body part separation step
S700: fixing part bonding step

Claims (6)

a body portion formed of a shape-memory alloy material as one integral configuration, the front surface of which is in close contact with the outer tooth surface of the mouth of each tooth along the tooth arrangement; and
It includes a; is coupled to both ends of the body portion, is formed in a shape corresponding to the shape of the inner periphery of the oral cavity of the tooth arrangement to fix the body portion so as to be in close contact with the outer tooth surface of the oral cavity;
The body part,
a curved protrusion formed to protrude toward the interdental space to be inserted between the teeth, and the front surface of which is in close contact with the inner tooth surface of a plurality of teeth forming the interdental space; and
Including; a plurality of support parts whose front surface is attached to the tooth surface of each tooth outside the interdental space;
The curved protrusion and the front surface of the support are formed by reflecting the vertical bending and inclination of the corresponding tooth surface,
Removable retainer, characterized in that the bent protrusion is formed to be thicker than the front and rear thickness of the support portion. delete The method of claim 1,
Removable retainer, characterized in that the front and rear thickness of the protruding end portion is formed to be the thickest, and the front and rear thickness decreases to correspond to the front and rear thickness of the support portion toward both ends. The method of claim 1,
The bent protrusion is a removable retainer, characterized in that the front and back of the protruding end is formed to be rounded. The method of claim 1,
Removable retainer, characterized in that the bent protrusion is formed to change in width from the bottom to the top corresponding to the interdental shape to be inserted. The method of claim 1,
The body portion, based on the three-dimensional scanning data of the tooth arrangement, a removable retainer, characterized in that formed by laser cutting a plate material of a shape memory alloy material and then cutting the front and back surfaces.

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