KR20110091268A - Method of fabricating for rapid palatal expander and rapid palatal expander using the same - Google Patents

Abstract

PURPOSE: A method of fabricating for rapid palatal expander and a rapid palatal expander using the same are provided to reduce manufacturing costs and corrective therapy costs by forming austenitic stainless steel same instead of a material like titanium. CONSTITUTION: In a method of fabricating for rapid palatal expander and a rapid palatal expander using the same, two pairs of band units(102') have a plurality of holes(104,106,108). One side of the hole in the edge of the each band is opened to outside of the each band. A hole and a steel wire unit(110) are combined through each laser welding method. The steel wire unit is combined with each band. The hole of each band is formed by a drilling method.

Description

TECHNICAL FIELD OF FABRICATING FOR RAPID PALATAL EXPANDER AND RAPID PALATAL EXPANDER USING THE SAME

The present invention relates to a rapid palatal expansion device manufactured by a method for manufacturing a rapid palatal expansion device and a method for manufacturing a rapid palatal expansion device, and more particularly, a method for manufacturing a rapid palatal expansion device manufactured using a laser welding method, and It relates to a rapid palatal expansion device manufactured by a method for manufacturing a rapid palatal expansion device.

In general, the jawbone of a normal person consists of the maxilla and the mandible, and upper and lower teeth are connected to the upper and lower jaw bones respectively formed on the upper and lower sides, and the upper and lower teeth are interlocked with each other according to the jaw joint movement. It consists of a chewable structure.

In the arrangement of the maxilla and the mandible, the normal person is formed so that the maxilla protrudes further forward than the mandible, but often the maxilla is smaller than the mandible so that the maxilla and the mandible may bite in opposition.

In other words, when viewed from the side and front of the human face, when the size of the maxilla is less than the size of the mandible in the anterior and rearward right and left directions, it is considered as negative occlusion.In this case, the maxilla is pulled forward and the upper teeth of the maxilla Orthodontic treatment is performed to expand the left and right sides.

As the palatal dilation device used for orthodontic treatment to correct such malocclusion, intraoral devices such as splints and extraoral devices such as face masks are mainly used.

However, although not shown and described in detail, in the conventional oral palatal dilatation device described above, welding is difficult to control as it is manufactured primarily using arc welding or other melt welding methods, so that calibration The disadvantage is that the treatment is not performed smoothly.

In addition, in the manufacture of the palatal expansion device as described above, by processing a material such as titanium (Titanium) to increase the burden on the cost of treatment from the position of the patient undergoing orthodontic treatment.

The present inventors have made a research effort to solve the above problems, and when manufacturing the palatal expansion device, the rapid palatal expansion device that can facilitate the orthodontic treatment to facilitate the manufacturing welding, and also prevent the increase of the cost of orthodontic treatment The development of the rapid palatal expansion device produced by the manufacturing method and the rapid palatal expansion device to complete the present invention.

Accordingly, an object of the present invention is to provide a rapid palatal expansion device manufacturing method and a rapid palatal expansion device manufacturing method that can easily control the production welding during the manufacture of the palatal expansion device.

In addition, an object of the present invention to provide a rapid palatal expansion device manufacturing method and a rapid palatal expansion device manufacturing method that can facilitate the orthodontic treatment by easily controlling the manufacturing welding as described above to provide a rapid palatal expansion device will be.

Furthermore, it is an object of the present invention to provide a rapid palatal dilator manufacturing method and a rapid palatal dilator manufacturing method which can prevent an increase in the cost of orthodontic treatment.

The present invention for achieving the above object is made of a pair of two, the step of providing a band (Band) formed with a plurality of holes on one surface; Fastening holes and steel wires of the edge portions of the uppermost edge portions of the respective band portions by laser welding; And fastening between the band portions to which the steel wires are fastened.

In a preferred embodiment, the holes of each band portion are formed in a drilling manner.

In a preferred embodiment, the pair is made of a pair, between the step of providing a band (Band) portion formed with a plurality of holes on one surface, respectively, the step of fastening the hole and the steel wire portion of the outermost edge portion of each band portion, respectively The opening may further include opening one side of the hole of the edge portion of the outermost side of each band part toward the outer side of each band part.

In a preferred embodiment, the step of opening one side of the hole of the outermost edge portion of each band portion toward the outside of the respective band portion, the opening between one side and the other side of the hole of the outermost edge portion of each band portion and the center between the center of the hole This is carried out to achieve 60 to 90 degrees.

In a preferred embodiment, the laser welding method uses a laser beam having an energy of 40-50J.

In addition, the present invention for achieving the above object is a rapid palatal expansion device, characterized in that manufactured by the method for producing a rapid palatal expansion device according to any one of claims 1 to 5.

In a preferred embodiment, the steel wire portion is characterized in that made of austenitic stainless steel.

In a preferred embodiment, the hole of the outermost edge portion of each band portion is open at one side toward the outside of the band portion.

In a preferred embodiment, the hole of the outermost edge portion of each band portion, characterized in that the angle between the open one side and the other side of the hole of the outermost edge portion of each band portion and the center of the hole is 60 ~ 90 °.

The present invention has the following excellent effects.

First, the rapid palatal expansion device manufactured by the rapid palatal expansion device manufacturing method and the rapid palatal expansion device manufacturing method of the present invention is to use a laser welding method using a laser beam rather than the conventional arc welding and other melt welding method. Accordingly, welding can be easily controlled in manufacturing the rapid palatal dilation device.

Therefore, the rapid palatal expansion device manufactured by the method for manufacturing the rapid palatal expansion device and the method for manufacturing the rapid palatal expansion device of the present invention can easily control welding during the manufacture of the rapid palatal expansion device as described above. It can be done smoothly.

In addition, the rapid palatal expansion device manufactured by the method for manufacturing the rapid palatal expansion device and the rapid palatal expansion device of the present invention, when manufacturing the rapid palate expansion device, a material such as austenitic stainless steel, not a material such as conventional titanium Manufacturing can reduce the cost of orthodontic treatment.

Figure 1a to 1d is a schematic diagram for each process shown to explain a method for manufacturing a rapid palate expansion device according to an embodiment of the present invention.
2 and 3 are photographs shown to explain a method for manufacturing a rapid palate expansion device according to an embodiment of the present invention.
4 is a graph illustrating a method for manufacturing a rapid palatal dilation device according to an embodiment of the present invention.
5 is a side view illustrating the rapid palatal expansion device manufactured by the method for manufacturing a rapid palatal expansion device according to an embodiment of the present invention.
6 and 7 are plan views illustrating the rapid palatal expansion device manufactured by the method for manufacturing the rapid palatal expansion device according to the embodiment of the present invention.

The terms used in the present invention are selected as general terms as widely used as possible, but in some cases, the terms arbitrarily selected by the applicant, but in this case, in consideration of the meanings described or used in the detailed description of the invention rather than simply the names of the terms. The meaning should be grasped.

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

However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

1A to 1D are schematic views for each process illustrated to explain a method for manufacturing a rapid palatal dilation device according to an embodiment of the present invention.

Referring to FIG. 1A, two pairs are formed, and band bands 102 each having a plurality of holes 104, 106, and 108 formed on one surface thereof are provided.

At this time, each of the band portion 102 consisting of a pair of two corresponding to each other is disposed so that each band portion 102 toward one direction, for example, is formed in an elliptical shape protruding the center portion.

In addition, a plurality of holes 104, 106, and 108 are formed on one surface of each band portion 102 formed by a pair corresponding to each other by a machining method such as a drilling method. 104, 106, 108 may be formed in the same or different sizes, respectively.

The plurality of holes 104, 106, and 108 formed in the same or different sizes may be formed on one surface of each band portion 102 to correspond to each other of each band portion 102 spaced apart to face one direction. Is formed.

Referring to FIG. 1B, one side of the outermost edge portion hole 106 of each band portion 102 is opened 116 outward.

At this time, the reason why the opening 116 of one side of the outermost edge portion hole 106 of each band portion 102 to the outside is to be welded firmly with the subsequent steel wire portion.

In addition, the hole 106 formed such that one side is opened 116 may include, for example, one side 115 and the other side 117 of the opening 116 of the uppermost edge portion hole 106 of each band portion 102. The opening 116 is formed such that the angle 118 between the holes 106 and the central portion P is 60 to 90 degrees.

Referring to FIG. 1C, the holes 106 and the steel wires 110 of the uppermost edge portions of the respective band portions 102 formed to be open 116 are fastened to each other.

The wire portion 110 is made of austenitic stainless steel, such as STS304 having biocompatible properties, for example, and has a size of about 36.5-37.5 mm.

At this time, when the steel wire 110 and the hole 106 of the outermost edge portion of each band portion 102 is fastened, a laser welding method is performed, and in this case, the laser welding method is 40 to 50 J. A laser beam (Beam) with energy is used.

Here, the principle of the laser welding method using such a laser beam can be briefly described as follows.

Laser welding is a welding method that utilizes key hole formation by rapid heating and resolidification phenomenon by rapid cooling when a heat source with high energy density is irradiated to the specimen. Since the cooling proceeds to the center, the welding is performed while the heat is rapidly cooled in the direction of the base material around the center of the molten cross section.

On the other hand, with reference to Figures 2 to 4 will be described for the principle of optimal energy derivation in the laser welding method according to an embodiment of the present invention.

2 is a photograph showing the penetration characteristics of a laser beam according to a defocused distance (f _d ) and an energy beam (J) size to explain a method for manufacturing a rapid palatal dilation device according to an embodiment of the present invention. As the energy of the beam changes, it shows the melt cross section penetrated into the specimen.

As shown in FIG. 2, when the energy is small, the melting area is small at the focal length, but the melting area is increased when it is outside the range of the focal plane. When the energy of the laser beam is 30J, the melting area and the melting depth are the smallest at the focal length, and when the laser beam is out of the range of the focal length, the melting area and the melting depth increase.

Meanwhile, in the case of a general laser beam, since the energy density is the largest at the focal length, the melting depth and the melting area are the highest, but in the photo of FIG. 2 according to the embodiment of the present invention, when the energy increases at the focal length, High energy density is exhibited.

In particular, it can be seen that such tendency is prominent in the energy of 60J and 70J, which is the melting temperature in the STS304 composition where the central density of the focal plane at 60J and 70J forms the steel wire according to the Gaussian distribution of the laser beam. This is because Ni (about 1455 ° C), Mn (about 1246 ° C), and P (about 44.2 ° C) components, which have a lower temperature than evaporated Cr (about 1907 ° C) and C (about 3527 ° C), evaporated and evaporated. .

In addition, even when pores are trapped in the molten cross section, a component having a low melting temperature is evaporated and the key hole is closed and captured before evaporating from the surface of the key hole.

In addition, if the energy of the laser beam is 30J, the energy concentrated on the small focal plane causes heat loss at the periphery of the specimen, but if the irradiation area increases beyond the focal length, the relative area increase due to the interaction between the specimen and the laser beam is considered. .

However, this phenomenon is limited when the energy or the output is small, and when the energy is increased, the energy absorption at the focal length with the largest energy density appears.

This is because the energy of the laser beam is small because the loss due to reflection on the surface of the specimen is relatively larger than the energy is absorbed on the surface of the specimen.

In addition, when the energy of the laser beam is high, such as 60J and 70J, the energy of the focused laser beam is larger than the diffraction loss occurring at the aperture boundary of the focal lens, and the energy of the laser beam is absorbed more by the specimen than reflection on the surface of the specimen. It seems to be.

In addition, when the energy of the laser beam is 30J, the penetration depth change was not large when the laser beam was irradiated at a depth at the focal length and a position out of the focal length.

In addition, when the energy of the laser beam is 50J, the depth of penetration is relatively deepest at the focal length, but as the energy increases, the relative depth of penetration depth with the change of focal length decreases.

Therefore, as described above, it can be confirmed that the case where the energy of the laser beam is 50J is most suitable as a condition of laser welding.

Figure 3 is a laser beam irradiation on the actual palatal expansion device in order to explain a method for manufacturing a rapid palatal expansion device according to an embodiment of the present invention observed the weld according to the overlap (overlap rate) and the beam energy (J) change It is a photograph.

As shown in FIG. 3. The energy of the laser beam was changed to 40J, 50J and 60J, and the overlap rate was changed to 10%, 20%, 30% and 40%, respectively. The cross section affected by the weld bead between (Pitch) is easily observed, and it is judged that the welding result as a whole is not good.

In addition, when the energy is 60J and the overlap rate is 40%, the excessive melting occurs and the melt cross section is formed too large. When the energy is 40J, even though the welding rate is increased from 10% to 10% by 40%, The STS304 steel wire, which forms the steel wire part, was not precisely welded without any gap with the band part.

This is considered to be due to the typical key hole welding characteristics of laser welding, when a laser beam having a high energy density is irradiated onto the specimen, vaporized fine bubbles of some components having a low melting temperature are generated.

That is, the bubble is ejected from the molten surface by buoyancy, but after the irradiation time of the laser beam, the keyhole is closed and trapped to remain as pores, so that some air remaining between the STS304 forming the steel wire and the partial gap close to the boundary layer of the band portion Bubbles generated by melt adhesion are considered to be trapped instead of being discharged.

Therefore, as described above, since the overlap ratio in the case where the energy of the laser beam is 50J is generally good, it can be confirmed that it is most suitable for the conditions of laser welding.

On the other hand, the palatal dilator is generally subjected to tensile and bending loads because it is deformed according to the shape of human maxilla, so the tensile stress test was performed to observe the tensile stress after the extreme bending stress. .

4 is a rapid palatal expansion device manufactured by welding with a laser according to an embodiment of the present invention in order to explain a method for manufacturing a rapid palatal expansion device according to an embodiment of the present invention, and manufactured by arc welding currently used in clinical practice. This is a graph comparing Tensile Stress test results according to displacement change between palatal dilators.

As shown in FIG. 4, the maximum tensile stress and displacement of the palatal dilatation apparatus which are processed by arc welding and applied to the clinical are 37.5 kg _f / mm 2 and (0.33 mm), respectively. _f / mm ² ) it can be seen that very small compared to the tensile stress.

In addition, the laser-welded palatal dilator increased the maximum stress and displacement by 246% or more compared with the arc welding method, and improved about 174% when compared with the tensile stress of the STS304 substrate.

As a result of the tensile test, the palatal dilator manufactured by arc welding and currently used in clinical practice is separated when the welded band portion and the steel wire portion exceed a certain tensile stress, but in the case of laser welding, when the maximum tensile stress is exceeded. It is judged that welding in the case of laser welding is very good because the steel wire portion is cut instead of separated.

In particular, the tensile stress and the displacement were different according to the energy and the degree of overlap of the laser beam. As shown, the welding conditions with the optimum stress and displacement were 50J for the energy beam, and 92.4kg _f / mm2 and ( 1.798 mm).

On the other hand, when the energy beam energy was welded at 40J, the tensile stress value and displacement increased by 200% compared to arc welding due to the lack of heat input at the weld.However, the energy beam had the maximum stress and displacement value compared to the 50J process. When the energy of the energy beam is 60J, the displacement is similar to that of 50J, but the maximum tensile stress is reduced by about 62.5%.

This is because, when the energy is relatively high at 60J, the amount of heat input to the welding is relatively high, so that the weld area between the steel wire part and the band part increases, brittleness occurs, and a part of the low melting temperature evaporates, thereby reducing the bonding force. Judging.

On the other hand, after the rapid palatal expansion device is installed in the oral cavity of the patient, the jaw mold acts to regulate jaw growth in a manner that maintains the teeth evenly.

According to the orthodontic treatment data, the orthodontic force is applied to a force of about 200 to 500 gf in a correction area such as a face mask, a head gear, and a rapid palatal expansion device. The rapid palatal expansion device according to an embodiment of the present invention is applied to the rapid palatal expansion device. The clearance between the attached steel wire and the band portion is enlarged laterally by using a bolt, so that a safe condition can be obtained even though a force of up to 500 gf is applied in the lateral direction of the tooth.

Therefore, as described above, although the difference in tensile stress and displacement occurs due to the energy change of the laser beam, it is safer to use the laser-welded palatal expansion device in clinical use than the palatal expansion device manufactured by arc welding. It can be confirmed that.

Subsequently, referring to FIG. 1D, the band pawls 102 to which the steel wires 110 are fastened are fastened to complete the rapid palatal expansion device according to the embodiment of the present invention.

At this time, between the band portion 102 to which the steel wire portion 110 is fastened by the fastening member 112, the fastening member 112 physically fastens between the band portion 102, and each band portion It is installed to adjust the separation distance between the 102.

The fastening member 112 is installed to penetrate through the remaining hole 104 except for the hole 108 formed at the center portion of one side of each band portion 102 and the hole 106 at the outermost edge portion, and each band portion 102. Physically tighten the liver.

In addition, the fastening member 112 includes a bolt guide 113 penetrating through a hole 108 formed at a central portion of one side of each band portion 102, and a bolt 114 installed on the bolt guide 113 and made of titanium. Is further formed.

On the other hand, the hole 108 in the center of each band portion 102 through which the bolt guide 113 penetrates is formed in a size of 1.4 to 1.6 mm so that the bolt guide 113 can penetrate.

5 is a side view illustrating a rapid palatal expansion device manufactured by a method for manufacturing a rapid palatal expansion device according to an embodiment of the present invention, and FIGS. 6 and 7 illustrate a rapid palatal expansion device according to an embodiment of the present invention. As a plan view illustrating the rapid palatal expansion device manufactured by the manufacturing method, the following description will be given.

5 to 7, the rapid palatal expansion device 100 manufactured by the method for manufacturing a rapid palatal expansion device according to an embodiment of the present invention is used as a device for orthodontics for correcting the teeth of the maxilla As the rapid palatal expansion device 100, the band portion (102), the steel wire portion 110 and the fastening member 112 is included.

The band portion 102 is composed of a pair of two corresponding to each other, a plurality of holes (104, 106, 108) is formed on one surface, respectively.

In addition, each of the band portion 102 made up of a pair of two corresponding to each other is disposed so that each band portion 102 is directed in one direction, each band portion 102 spaced apart to face this one direction is an example For example, as shown in FIG. 5, the center portion has an elliptical shape protruding.

In addition, the plurality of holes 104, 106, and 108 formed on one surface of each of the band portions 102 formed by pairs corresponding to each other are formed in the same or different sizes, respectively, by machining such as a drilling method. Can be.

At this time, the plurality of holes (104, 106, 108) formed in the same or different sizes corresponding to each other of the band portion 102 spaced apart to face in one direction when formed on one surface of each band portion 102 It is formed in the part.

Steel wire portion 110 is fastened to the hole 106 of the outermost edge portion of each of the band portion 102, respectively.

The hole 106 of the outermost edge portion of each band portion 102 that is fastened with the steel wire portion 110, one side toward the outside so that the steel wire portion 110 and each of the band portion 102 can be welded firmly It is formed to be open (116).

At this time, the steel wire portion 110 having one side open 116 is, for example, the one side 115 and the other side 117 of the opening 116 of the outermost edge portion hole 106 of each band portion 102. The opening 116 is formed such that the angle 118 between the holes 106 and the central portion P is 60 to 90 degrees.

In addition, the steel wire portion 110 is made of austenitic stainless steel, such as STS304 having biocompatible properties, for example, and has a size of about 36.5 to 37.5 mm.

The fastening member 112 is installed to penetrate the remaining hole 104 except for the hole 108 formed at the center portion of one side of each band portion 102 and the hole 106 at the outermost edge portion, and between each band portion 102. Physically tighten the

At this time, the fastening member 112 is a bolt guide 113 penetrating through the hole 108 formed in the central portion of each band portion 102, and the bolt 114 is installed in the bolt guide 113, 114 made of titanium It may further include.

On the other hand, the hole 108 in the center of each band portion 102 through which the bolt guide 113 penetrates is formed in a size of 1.4 to 1.6 mm so that the bolt guide 113 can penetrate.

In addition, the bolt guide 113 and the bolt 114 made of titanium are physically fastened between each band portion 102, and is installed to adjust the mutual separation distance between each band portion 102.

As described above, the present invention facilitates welding according to the manufacture of the rapid palatal expansion device by manufacturing the rapid palatal expansion device by using a laser welding method using a laser beam rather than the conventional arc welding and other melt welding methods. Can be controlled.

Therefore, the present invention can easily control the welding according to the rapid palatal expansion device as described above, it is possible to smoothly perform the orthodontic treatment.

In addition, the present invention can reduce the cost of orthodontic treatment by manufacturing using a material such as austenitic stainless steel rather than a material such as titanium in the manufacture of a rapid palatal expansion device.

As described above, the present invention has been illustrated and described with reference to preferred embodiments, but is not limited to the above-described embodiments, and is provided to those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.

100: rapid palatal expansion device 102: band portion
104, 106, 108: hole 110: steel wire
112: fastening member 113: bolt guide
114: bolt 115: one side
116: opening 117: the other side
118: each P: center

Claims (9)

Comprising a pair of two, providing a band (Band) portion formed with a plurality of holes on one surface;
Fastening holes and steel wires of the edge portions of the uppermost edge portions of the respective band portions by laser welding; And
Fastening between the band parts to which the steel wire parts are fastened;
Rapid palatal expansion device manufacturing method comprising a. The method of claim 1,
The hole of each band portion is a rapid palatal expansion device manufacturing method characterized in that it is formed by a drilling (Drilling) method. The method of claim 1,
Between the two are made in pairs, between the step of providing a band (Band) formed with a plurality of holes on one surface, respectively, and the step of fastening the hole and the steel wire portion of the outermost edge portion of each band, respectively,
Opening one side of a hole of an edge portion of the outermost side of each band part toward the outside of each band part;
Rapid palatal expansion device manufacturing method characterized in that it further comprises. The method of claim 3, wherein
The step of opening one side of the hole of the outermost edge portion of each band portion toward the outside of each band portion, the angle between the open one side and the other side of the hole of the outermost edge portion of each band portion and the center of the hole is 60 ~ 90 ° Rapid palatal expansion device manufacturing method characterized in that to carry out. The method of claim 1,
The laser welding method is a rapid palatal expansion device manufacturing method characterized in that using a laser beam (Beam) having an energy of 40 ~ 50J. A rapid palatal dilatation apparatus, characterized in that produced by the method for producing a rapid palatal dilation device according to any one of claims 1 to 5. The method according to claim 6,
The steel wire portion is a palatal expansion device, characterized in that made of austenitic stainless steel. The method according to claim 6,
The hole in the outermost edge portion of each band portion is a quick palate expansion device, characterized in that one side is open toward the outside of the band portion. The method of claim 8,
The hole of the outermost edge portion of each band portion, the rapid palate expansion device, characterized in that the angle between the open one side and the other side of the hole of the outermost edge portion of each band portion and the center of the hole.

Images