WO2019135504A1

WO2019135504A1 - Customized orthodontic three-dimensional arch wire fabricating method

Info

Publication number: WO2019135504A1
Application number: PCT/KR2018/015694
Authority: WO
Inventors: 이종호
Original assignee: 주식회사 링구얼라인
Priority date: 2018-01-02
Filing date: 2018-12-11
Publication date: 2019-07-11
Also published as: KR20190082452A

Abstract

A customized orthodontic three-dimensional arch wire fabricating method is disclosed. A customized orthodontic three-dimensional arch wire fabricating method according to an embodiment of the present invention comprises the steps of: arranging a heating jig on the basis of a bracket slot of a bracket attached to teeth rearranged in a correction target position in a computer aided design (CAD) system; arranging the heating jig so as to overlap a jig base to a predetermined depth in the CAD system; removing a jig base area in which the heating jig and the jig base overlap in the CAD system, thereby providing a jig printing negative mold in the jig base; fabricating the heating jig and the jig base in which the jig printing negative mold is provided; coupling an arch wire to the heating jig; coupling the heating jig, to which the arch wire is coupled, to the jig base fabricated such that the jig printing negative mold is provided therein; heating the arch wire at a predetermined temperature for a predetermined time while the heating jig remains coupled to the jig base such that the same memorizes the shape thereof; and detaching the arch wire.

Description

How to make a customized orthodontic 3D arch wire

The present invention relates to a method of making a customized orthodontic three-dimensional arch wire, and more particularly, to a method of making a customized orthodontic three-dimensional arch wire capable of producing a more accurate shape of the orthodontic arch wire required for calibration.

Two basic orthodontic treatments are commonly used in the treatment of correcting and correcting incorrect teeth. These orthodontic treatments are Light Wire Therapy and Tephra Therapy.

Lightweight wire therapy fixes the bracket to every tooth that contains the molar, and evenly aligns the teeth with an arch wire that looks round in cross-section. The arch wire is loosely secured to the bracket and is not tied to the strap, minimizing friction and contacting at one point to allow the teeth to freely slide, rotate, tilt, and twist. In particular, tilting, torsion and rotation require a suitable auxiliary device.

Teneum treatment is currently the most widely and commonly used orthodontic treatment, and at the beginning it uses a round cross-sectional shape Arch Wire, which is a flexible, rounded arch wire, Move over the range. The Arch Wire is inserted into a slot formed in a bracket attached to all permanent teeth including molars, and is provided with a metal band or an elastic band.

Such a tephra therapy can control the teeth in all directions, so that any individual tooth can be moved simultaneously in three directions. For example, anterior teeth can be moved to the lingual position, and the arch wires can be adjusted to rotate around the long axis of the teeth. The arch wires have the same characteristics as springs and ligatures, The torsional force is applied to the tooth through the arch wire, which causes the tooth to rotate and move until it is not torn due to the spring wire and ligature actuation of the arch wire.

The bracket is composed of a Siamese type having a twin shape on the front side and a single type having a single independent shape, an arch wire is inserted and fixed on the middle part, and attached to the surface of each tooth with an adhesive, It acts by direct force to tilt, twist and rotate the force of the elasticity of the arch wire to the tooth, which can be attached to the lingual side between the tooth and lips and to the lingual side between the tooth and tongue.

On the other hand, a titanium alloy or a wire made of stainless steel is often used as an arch wire for calibration. Among the titanium alloys, Nitinol, an alloy of nickel and titanium, is a typical shape memory alloy that has been commercialized and has excellent resilience and is widely used for orthodontics.

Nitinol alloy, when heated to a temperature of 500 ° C or higher, is fixed in its original shape while changing its atomic arrangement in the crystal, and then shows a restoring force to return to a fixed shape.

In the prior art, however, the arch wire is bent to a desired shape by bending using a separate bending machine. The nitinol alloy has a property of memorizing the initial shape, and it is bent at a desired angle at a desired position using a bending machine There is a limit in that it is not possible to obtain an arch wire of a desired shape by merely giving.

In recent years, customized orthodontic techniques have been introduced that make the patient's ideal tooth condition a set-up model and then use computer software to design the bracket's position and shape of the arch wire.

However, in the conventional art, since the arch wire is manufactured in a two-dimensional plane, the three-dimensional bending angle and position of the arch wire can not be accurately determined and can not be precisely realized in the arch wire.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of accurately determining the three-dimensional bending angle and position of an arch wire in consideration of a state of a patient's oral cavity, Dimensional arch wire that can be manufactured in a more accurate shape necessary for calibration.

According to the present invention, the three-dimensional bending angle and position of the arch wire can be precisely determined in consideration of the state of the oral cavity of the patient, the position and size of the teeth, and the precise arch wire can be realized. It can be manufactured in a more accurate shape.

Figure 1 is a flow chart of a method of making a customized orthodontic three-dimensional arch wire in accordance with an embodiment of the present invention.

FIGS. 2 to 4 are views showing a bracket slot of a bracket attached to teeth rearranged to a position to be corrected, in a computer aided design (CAD) system.

5 to 6 are views showing a state in which a heating jig is arranged along an arch wire passing through a bracket slot of a bracket attached to teeth rearranged to a position to be calibrated in a CAD (Computer Aided Design) system .

7 is an exploded perspective view of the heating jig of this embodiment.

8 to 9 are views showing a state in which a heating jig and a jig base are overlapped with each other in a CAD system to prepare jig printing dies on the jig base.

10 is a view showing a state in which an arch wire is coupled to a heating jig.

FIG. 11 is a view illustrating a heating jig to which an arch wire is coupled to a jig base provided with a jig printing sound pattern.

12 is a perspective view of a heating jig of another embodiment.

13 is a perspective view of a heating jig in yet another embodiment.

Fig. 14 is a perspective view of a heating jig in yet another embodiment. Fig.

According to an aspect of the present invention, there is provided a computer aided design (CAD) system, comprising: arranging a heating jig based on a bracket slot of a bracket attached to teeth rearranged to a position to be calibrated; Disposing the lower end wall of the heating jig in the CAD system so as to overlap the jig base to a predetermined depth; Removing the jig base area where the heating jig and the jig base overlap with each other in the CAD system to prepare a jig printing pattern on the jig base; Fabricating the jig base provided with the jig printing dies and the heating jig; Coupling the arch wire to the heating jig; Coupling a heating jig to which the arch wire is coupled to the jig base fabricated to have the jig printing pattern; Heating the arch wire to a predetermined temperature for a predetermined time in a state where the heating jig is engaged with the jig base; And a step of removing the arch wire. The method of manufacturing a customized orthodontic orthodontic arch wire of the present invention can be provided.

In the computer aided design (CAD) system, the step of arranging the heating jig based on the bracket slot of the bracket attached to the teeth rearranged to the position to be calibrated may be performed by moving the bracket, Dimensional modeling of the bracket; Rearranging the teeth to a position to be calibrated based on three-dimensional modeling of the bracket and preparing a three-dimensional calibration model of the bracket attached to the teeth rearranged to a position to be calibrated; And arranging the heating jig along the arch wire passing through the bracket slot of the bracket on the calibration modeling of the bracket.

The step of arranging the heating jig along the arch wire passing through the bracket slot of the bracket on the calibration modeling of the bracket may include arranging the heating jig so that the wire ligation slot formed in the heating jig includes at least part of the bracket slot of the bracket. To the arch wire.

The step of removing the jig base area in which the heating jig and the jig base overlap each other in the CAD system to prepare the jig printing dies on the jig base comprises the steps of: Wherein the step of preparing the jig base and the heating jig provided with the jig printing sound dies comprises: machining the jig printing dies on the jig base; And drilling the fastening hole into the jig base, wherein the arch wire is made of Nitinol.

The heating jig includes: an upper jig body having at least one upper through-hole through which a base coupling member for coupling with the jig base can be coupled; A lower jig body coupled to the upper jig body so as to be coupled to and detachable from the upper jig body and having a lower through hole communicating with the upper through hole; And a jig coupling member for coupling the upper jig body and the lower jig body, wherein at least one of the upper jig body and the lower jig body is provided with at least one of the upper jig body and the lower jig body, A ligation groove is provided so as to provide a wire ligation slot formed in the jig, and the step of detaching the arch wire comprises: separating the upper jig body and the lower jig body; And separating the arch wire from the heating jig.

The heating jig includes at least one through hole through which a base coupling member for coupling with the jig base is formed and is formed with a predetermined depth on a top surface thereof and is provided with a wire ligation slot into which the arch wire is inserted Jig body; And a pressing member for pressing the arch wire which is coupled to the jig body and is located in the wire ligation slot.

Wherein the heating jig further includes a washer disposed between the pressing member and the jig body, wherein the washer is disposed between the pressing member and the heating jig body, and is pressed by the pressing member, A washer body which is brought into close contact with the wire ligation slot; And a fitting blade extending from the washer body to fit into the jig body.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

1 is a flow chart of a method of making a customized orthodontic three-dimensional arch wire according to an embodiment of the present invention, Figs. 2-4 illustrate a bracket slot of a bracket attached to teeth rearranged to a position to be calibrated, 5 through 6 illustrate an example of a computer aided design (CAD) system in which an arch wire passing through a bracket slot of a bracket attached to teeth rearranged to a position to be corrected FIGS. 8 to 9 are views showing a state in which a heating jig and a jig base are overlapped with each other in a CAD system to provide jig printing textures on the jig base. FIGS. 8 to 9 are views 10 is a view showing a state in which an arch wire is coupled to a heating jig, and FIG. 11 is a view showing a state in which a jig base A diagram showing a state that combines the heating jig Chi wire bonding.

Referring to these drawings, the method of manufacturing a customized orthodontic three-dimensional arch wire according to the present embodiment is characterized in that in a computer aided design (CAD) system, a braid (not shown) attached to teeth rearranged to a position to be corrected (S100) of arranging the heating jig (200) on the arch wire (100) based on the bracket slot (10) (Step S200) of removing the jig base area where the heating jig 200 and the jig base 300 are overlapped with each other in the CAD system so that the jig base 310 is provided on the jig base 300 A step S500 of joining the arch wire 100 to the heating jig 200, a step S400 of manufacturing the jig base 300 and the heating jig 200 provided with the jig printing dies 310, And a jig base 300 provided with jig printing dies 310, A step S600 of coupling the heating jig 200 coupled to the jig base 300 and a step S700 of heating and heating the arch wire 100 to a predetermined temperature for a predetermined time in a state of being coupled to the jig base 300, And removing the arch wire 100 (S800).

First, in the computer aided design (CAD) system, arranging the heating jig 200 on the arch wire 100 based on the bracket slot 10 of the bracket attached to the teeth rearranged to the position to be calibrated S100) is performed.

In this embodiment, the step of arranging the heating jig 200 on the arch wire 100 based on the bracket slot 10 of the bracket may be performed by scanning the bracket attached to the patient's tooth with an oral scanner, Deriving modeling, rearranging the teeth to a position to be corrected based on the three-dimensional modeling of the bracket, and preparing three-dimensional calibration modeling of the brackets attached to the teeth rearranged to the position to be corrected And arranging the heating jig 200 along the arch wire 100 passing through the bracket slot 10 of the bracket on the calibration modeling of the bracket.

First, a bracket attached to a patient's tooth is scanned with an oral scanner to derive a three-dimensional modeling of the bracket.

Next, based on the three-dimensional modeling of the bracket thus derived, the step of rearranging the teeth to the position to be corrected and preparing the three-dimensional calibration model of the bracket attached to the rearranged teeth .

In the three-dimensional calibration modeling of the bracket thus prepared, as shown in FIGS. 2 to 4, it can be seen that the slots of the bracket have various angles and positions on three dimensions. Thus, the orthodontic arch wire 100 should be manufactured so as to have various angles and positions in three dimensions.

The archwire 100 for calibration may be considered to consist of a primary band, a secondary band, and a tertiary band. The first is involved in dilation and contraction in the form of an arch wire (100) in the horizontal plane by the buccolingual movement, the second is involved in the slope of the tooth as the slope of the root in the vertical plane, and the third is involved in the torque of the root. As a result, the x-axis, the y-axis, and the z-axis can be seen as a first order motion, a front-back slope as a second order, and a left-right slope as a third order.

In this embodiment, in order to provide three-dimensional calibration modeling of the brackets attached to the teeth rearranged to the positions to be corrected, the brackets attached to the patient's teeth are scanned with an oral scanner, Dimensional modeling of the brackets and rearranging the teeth to the positions to be corrected based on the three-dimensional modeling of the brackets. However, the scope of the present invention is not limited to this, and for example, A tooth set up model of the patient may be prepared and provided based on the patient's tooth set up model. The creation of the set-up model can be accomplished by cutting the tooth of the patient's maxilla or mandibular malocclusion model and rearranging it to the ideal position.

Then, a step of arranging the heating jig 200 on the arch wire 100 passing through the bracket slot 10 of the bracket on the calibration modeling of the bracket in a computer aided design (CAD) system is performed.

In this embodiment, the step of arranging the heating jig 200 on the arch wire 100 passing through the bracket slot 10 of the bracket on the calibration modeling of the bracket, as shown in detail in Figs. 5 to 6, It may be a step of coupling the heating jig 200 to the arch wire 100 so that the wire ligation slot formed in the jig 200 includes at least a part of the bracket slot 10 of the bracket. In this embodiment, the heating jig 200 is coupled to the arch wire 100 so that the wire ligation slot formed in the heating jig 200 substantially completely includes the bracket slot 10 of the bracket.

7, the heating jig 200 includes at least a base engaging member 260 for engaging with the jig base 300 at least at a position where the base engaging member 260 can be engaged therewith, A lower jig body 210 coupled to the upper jig body 210 so as to be coupled to and detachable from the upper jig body 210 and having a lower through hole 262 communicating with the upper through hole 262, And a jig coupling member 250 coupling the upper jig body 210 and the lower jig body 220 to each other. A wire ligation slot 230 formed in the heating jig 200 when the upper jig body 210 and the lower jig body 220 are coupled is formed in at least one of the upper jig body 210 and the lower jig body 220 A ligation groove 240 is formed in the lower jig body 220 in this embodiment.

By connecting the heating jig 200 to the arch wire 100 so that the wire ligation slot 230 formed in the heating jig 200 includes the bracket slot 10 of the bracket, The heating jig 200 has a position.

The upper jig body 210 and the lower jig body 220 are each provided with a body coupling hole 252 through which the upper jig body 210 and the lower jig body 220 are coupled by inserting the jig coupling member 250. The upper jig body 210 and the lower jig body 220 are provided with through holes 262 for fastening with the jig base 300 so that the base coupling member 260 is inserted into the through holes 262, The upper jig body 210 and the lower jig body 220 are fastened to the jig base 300.

Then, a step S200 of placing the bottom wall of the heating jig 200 in the CAD system so as to overlap the predetermined depth of the jig base 300 is performed. That is, the jig base 300 approaches the heating jig 200 substantially horizontally, and is arranged to overlap with the heating jig 200 to a certain depth as if the heating jig 200 is printed.

8 to 9, the jig base area where the heating jig 200 and the jig base 300 are overlapped is removed in the CAD system, and the jig base material 300 (S300) is performed.

The heating jig 200 and the jig base 300 are removed so that the heating jig 200 is printed on the jig base 300. As a result, ) Are transferred in various three-dimensional angles and positions.

This step also includes the step of providing a fastening hole 320 in the jig base 300 which is in communication with the through hole 262 of the heating jig 200 for coupling the heating jig 200 and the jig base 300 can do.

9, the heating jig 200 is printed on the jig base 300 at various angles in three dimensions, and the fixing jig 200 is fixed to the jig base 300 320 are also provided.

Then, a step 400 of manufacturing the jig base 300 and the heating jig 200 provided with the jig printing dies 310 is performed. The step of providing the jig base 300 provided with the jig printing dies 310 may include the steps of processing the jig printing dies 310 on the jig base 300 and attaching the fastening holes 320 to the jig base 300 And perforating.

The heating jig 200 may be manufactured in advance. Since the heating jig 200 can use the same heating jig 200 for various patients, the bracket attached to the patient's teeth may have already been manufactured before scanning with the oral scanner.

Then, as shown in FIG. 10, a step S500 of coupling the arch wire 100 to the manufactured heating jig 200 is performed.

Then, a step S600 of engaging the heating jig 200 to which the arch wire 100 is coupled is performed in the jig base 300 provided with the jig printing paper 310. [

Since the jig base 300 is provided with the jig printing dies 310 having various three-dimensional angles, when the heating jigs 200 are fixed to the jig base 300 at respective positions, In the modeling, the wires are naturally bent according to the three-dimensional positions and angles of the wire-coupling slots 230.

Next, in a state in which the arch wire 100 is coupled to the jig base 300, the step S700 of heating and shaping the arch wire 100 to a predetermined temperature for a predetermined time is performed.

As described above, in the prior art, when the bending angle and position of the arch wire 100 are determined, the arch wire 100 is directly bended by separate bending equipment, while in this embodiment, the arch wire of the shape memory alloy material 100 are manufactured through baking of the arch wire 100 made of Nitinol in a desired shape.

The predetermined temperature at the time of heating may be variously set, but it is preferable that the arch wire 100 made of Nitinol is heated at a temperature of about 500 캜 for a predetermined time, Thereby allowing the jig 200 to store the bend shape.

Then, step S800 of removing the arch wire 100 is performed. The heating jig 200 is provided with the upper jig body 210 and the lower jig body 220 because the step of heating the arch wire 100 to a predetermined temperature for the shape memory The upper jig body 210 and the lower jig body 220 are separated and easily detached when the arch wire 100 is detached.

The step of detaching the arch wire 100 in this embodiment includes a step of separating the upper jig body 210 and the lower jig body 220 and a step of separating the arch wire 100 from the heating jig 200 .

Although the heating jig 200 includes the upper jig body 210 and the lower jig body 220 in the above embodiment, the heating jig 200 may be variously provided.

12 is a view of a heating jig according to another embodiment. As shown therein, the heating jig 200a includes at least one heating jig 200a to which a base coupling member (not shown) for coupling with the jig base 300 can be coupled A jig body 210a formed with a through hole 262a of the jig body 210a and recessed by a predetermined depth on the upper surface and having a wire ligation slot into which the arch wire 100a is inserted, And a pressing member 250a for pressing the arch wire 100a placed in the slot.

When the arch wire 100 is fixed, the pressing member 250a is coupled to the jig body 210a, and when the arch wire 100 is pressed and separated, the pressing member 250a is moved from the jig body 210a .

13 is a view of a heating jig according to another embodiment of the present invention. As shown in FIG. 13, the heating jig 200b is disposed between the pressing member 250b and the jig body 210b As shown in FIG.

14 is a view of a heating jig according to another embodiment of the present invention. As shown in FIG. 14, the heating jig 200c is disposed between the pressing member 250c and the jig body 210c Wherein the washer 270c is disposed between the pressing member 250c and the jig body 210c and pressed by the pressing member 250c so as to connect the arch wire 100 to the wire ligation A washer body 271c which is in close contact with the slot and a fitting blade 273c which extends from the washer body 271c and is fitted into the jig body 210c. That is, it further includes a fitting blade 273c in comparison with Fig.

According to the present embodiment having the structure and function as described above, the three-dimensional bending angle and position of the arch wire can be accurately determined in consideration of the state of the oral cavity of the patient, the position and size of the teeth, Thereby making it possible to fabricate the orthodontic arch wire in a more accurate shape necessary for calibration.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. It is therefore intended that such modifications or alterations be within the scope of the claims appended hereto.

The present invention can be applied to the field of orthodontic technology.

Claims

In a computer aided design (CAD) system, arranging a heating jig based on a bracket slot of a bracket attached to teeth rearranged to a position to be calibrated;

Disposing the lower end wall of the heating jig in the CAD system so as to overlap the jig base to a predetermined depth;

Removing the jig base area where the heating jig and the jig base overlap with each other in the CAD system to prepare a jig printing pattern on the jig base;

Fabricating the jig base provided with the jig printing dies and the heating jig;

Coupling the arch wire to the heating jig;

Coupling a heating jig to which the arch wire is coupled to the jig base fabricated to have the jig printing pattern;

Heating the arch wire to a predetermined temperature for a predetermined time in a state where the heating jig is engaged with the jig base; And

And removing the arch wire. &Lt; RTI ID = 0.0 > 11. < / RTI >
The method according to claim 1,

In the computer aided design (CAD) system, the step of arranging the heating jig based on the bracket slot of the bracket attached to the teeth rearranged to the position to be calibrated,

Dimensional modeling of the bracket by scanning the bracket attached to the patient's tooth with an oral scanner;

Rearranging the teeth to a position to be calibrated based on three-dimensional modeling of the bracket and preparing a three-dimensional calibration model of the bracket attached to the teeth rearranged to a position to be calibrated; And

And arranging the heating jig along the arch wire passing through the bracket slot of the bracket on the calibration modeling of the bracket.
3. The method of claim 2,

The step of arranging the heating jig along the arch wire passing through the bracket slot of the bracket on the calibration modeling of the bracket,

Wherein coupling the heating jig to the arch wire is such that the wire ligation slot formed in the heating jig includes at least a portion of the bracket slot of the bracket.
The method according to claim 1,

The step of removing the jig base area where the heating jig and the jig base overlap each other in the CAD system to prepare the jig printing dies on the jig base,

Further comprising the step of providing, in the jig base, a fastening hole communicating with the through hole of the heating jig for engaging the heating jig and the jig base,

The step of fabricating the jig base and the heating jig provided with the jig-

Processing the jig printing dies on the jig base; And

And drilling the fastening hole into the jig base,

Wherein the arch wire is made of Nitinol. &Lt; RTI ID = 0.0 > 11. < / RTI >
The method according to claim 1,

The heating jig,

An upper jig body having at least one upper through hole through which a base coupling member for coupling with the jig base can be inserted;

A lower jig body coupled to the upper jig body so as to be coupled to and detachable from the upper jig body and having a lower through hole communicating with the upper through hole; And

And a jig coupling member for coupling the upper jig body and the lower jig body,

Wherein at least one of the upper jig body and the lower jig body is provided with a ligation groove to provide a wire ligation slot formed in the heating jig when the upper jig body and the lower jig body are coupled,

Wherein the step of removing the arch wire comprises:

Separating the upper jig body and the lower jig body from each other; And

And separating the arch wire from the heating jig. &Lt; RTI ID = 0.0 > 11. < / RTI >
The method according to claim 1,

The heating jig,

A jig body having at least one through hole through which a base coupling member for coupling with the jig base is formed, a jig body provided with a wire ligation slot which is recessed at a predetermined depth on an upper surface thereof and into which the arch wire is inserted; And

And a pressing member for pressing the arch wire which is coupled to the jig body and is located in the wire ligation slot.
The method according to claim 6,

The heating jig further includes a washer disposed between the pressing member and the jig body,

The washer

A washer body disposed between the pressing member and the heating jig body and pressed by the pressing member to closely contact the arch wire to the wire ligation slot; And

And a fitting blade extending from the washer body to fit into the jig body.