JPH08113B2 - Orthodontic device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an orthodontic device, and more particularly to an orthodontic device which can be easily fixed by adhesion.

[0002]

2. Description of the Related Art Conventionally, an orthodontic bracket is provided with a series of brackets secured to individual teeth of a dentition to be orthodontic provided with a wire locking groove and a wire locking groove of the bracket. An orthodontic device consisting of one wire is used to fix the flat surface of each bracket to the teeth with an adhesive, and the brackets are connected with a wire.

[0003]

The most difficult point in such a correction method is that the bracket is fixed and adhered to teeth having large twists, inclinations, shifts, etc. and different shapes at appropriate positions and angles. Conventionally, it has been necessary to prepare various types of brackets having different shapes on the tooth fixing side of the bracket, or to process the bracket according to the shape of the tooth each time.

[0004] The inventor of the present invention has previously filed an application for creating a base plate component for the purpose of reducing such work and variety of products (Japanese Patent Application No. 3-67330). In this base plate, a base plate having a surface that conforms to the contours, curvatures, and the like of several types of typical teeth is manufactured, and only this base plate is first fixed to the teeth, and then the bracket is fixed onto the base plate. When using this base plate, you only need to prepare one type of bracket,
In addition, the mounting of the bracket becomes relatively easy, and the burden on both the doctor and the patient is reduced.

However, whichever type of orthodontic device is used, at least some types of brackets or base plates are required, and still sticking to teeth having various shapes and arrangements depending on individuals is still required. A high degree of skill is required.

The present invention, by providing a base plate that can be readily formed shape processed in a shape corresponding to the individual teeth in the bracket, can be a one-to-one correspondence to the individual shape of the teeth, yet mounting device is extremely easy An object of the present invention is to provide an orthodontic device.

[0007]

SUMMARY OF THE INVENTION An orthodontic device of the present invention comprises a series of brackets secured to individual teeth of a dentition to be orthodontic with a wire locking groove and a wire locking groove of the bracket. A bracket is provided with a base plate made of an easily plastically deformable resin on the tooth fixing side surface of the bracket , and the wire has a rectangular cross section, and
The wire locking groove has a T-shaped cross section .

[0008]

According to the orthodontic device of the present invention, since the base plate on the tooth fixing side of the bracket is made of the hardenable plastically deformable resin, the base plate of the bracket can be pressed accurately against the teeth to be fixed. Since it can be made to correspond and then cured to give rigidity, the bracket can be fixed easily and accurately, and long-term fixed use can be secured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An orthodontic device of the present invention will be described with reference to the drawings.

A combination of the bracket 2 and the wire 4 suitable for carrying out the present invention is shown in FIG. The combination was previously filed by the present inventor (Japanese Patent Application No. 3-67330), and a preferred embodiment of the present invention is that the bracket is provided with the easily plastically deformable resin base plate 5.

The orthodontic device shown in FIG. 1 has a bracket 2 fixed to each tooth T, a wire 4 inserted in a wire locking groove 3 formed in the bracket, and a tooth fixing side surface of the bracket 2. The base plate 5 is provided.

As shown in FIG. 2, the bracket 2 has a plate-shaped base portion 2a to be fixed to the teeth T, and an L-shaped claw portion 2b projecting from the upper and lower ends of the base portion 2a.
Consists of Thereby, a T-shaped wire locking groove 3 is formed between the claw portions 2b. Base plate 5 on the base 2a
Are glued together. Since the base plate 5 is made of an easily plastically deformable resin, it initially has a soft plasticity, or becomes plastic by heating.
The thickness is preferably 0.5 to 5 mm from the viewpoint of workability.

Next, the function of the base plate 5 in the apparatus of the present invention will be specifically described with reference to FIG. Figure 3 (a)
(D) is a schematic plan view showing the work until the tooth Ta to be corrected is shaped by the base plate 5 and fixed.
The base plate 5 provided on the side of the base portion 2a of the bracket 2 is pressed against the teeth Ta to which the bracket 2 is fixed (FIGS. 3 (a) and 3 (b)), and is firmly shaped. Since the base plate 5 is easily plastically deformable, it is easily plastically deformed and closely adheres to the surface shape of the tooth Ta. If necessary, heating may be performed to facilitate plastic deformation. If the material resin of the base plate 5 is non-adhesive to the teeth, this shaping operation may be performed directly on the patient's teeth. But,
If the material resin is easily sticky to the teeth or if the teeth to be corrected are in places where it is difficult to work,
It is also possible to take a plaster mold of the dentition in advance and perform the shaping work on the plaster mold.

The shaped base plate 5 is peeled from the teeth together with the bracket 2 (FIG. 3 (c)), and then cured. In the case of a curable resin, as a curing means, a means conventionally used in the field of tooth processing can be adopted, and heat, light or the like is used. In the case of a thermoplastic resin, it may be cooled.

The bracket 2 having the hardened base plate 5 is fixed to the corresponding tooth Ta with an adhesive (not shown) (FIG. 3 (d)).

Conventionally, it has been difficult to adjust the amount of adhesive and the gap in the adhesive fixing technique of the bracket, but according to the present invention, it is possible to attach and fix with one touch with a slight adjustment. In this way, the wire 4 is inserted and fitted into the bracket 2 fixed to each tooth to complete the orthodontic condition (FIG. 3).
(d)).

The material forming the base plate 5 is a resin that is easily plastically deformable. Such a resin is a thermosetting resin such as an epoxy resin, an acrylic resin, or a phenolic resin, which has been conventionally known as a dental material, an epoxy resin, an acrylic UV resin.
Examples thereof include photocurable resins such as cross-linking resins, thermoplastic resins such as polyolefins, polyesters, polyamides, polyimides and polycarbonates.

A conventionally known adhesive may be appropriately selected according to the material of the base plate. However, according to the present invention, the amount of the adhesive is small because the surface of the base plate has a shape capable of closely adhering to the teeth. Also, it is possible to significantly reduce the processing correction after bonding.

Various types of brackets and wires can be used for the orthodontic device of the present invention. Examples of the brackets and wires include those shown in FIG. 1 and those shown in FIGS.

Although the bracket 2 shown in FIG. 1 is provided with an overhanging portion on the base portion 2a, it may have a shape (FIG. 4) excluding the overhanging portion.

The wire 4 shown in FIG. 1 is provided with a ridge 6 at the center of the wire along the upper opening of the bracket 2 (which serves as the entrance and exit of the wire), and a groove 7 at the opposite center.
Is provided. The ridge 6 structurally enhances the rigidity and deformation resistance of the wire 4, and may be larger depending on the degree of correction and the material of the wire (FIGS. 5 and 6), or may not be provided. (Eg, FIGS. 7 and 8). As shown in FIG. 9, the recessed groove 7 holds the wire 4 and pushes it into the wire locking groove 3 of the bracket 2 when the wire 4 is pushed.
Is provided so as to flex well in the width direction,
It may not be provided depending on the material and thickness of the wire (FIGS. 5, 6, and 7).

Besides, the conventional bracket 2 shown in FIG.
The present invention also includes a base plate 5 provided in combination with the wire 4 and the wire 4. In the embodiment shown in FIG. 10, the wire 4 is fastened to the groove 8 provided in the bracket 2 with the wire material 9, and it requires skill to attach the wire.

The size of the bracket is usually about 1 to 5 mm in the base portion, about 1 to 5 mm in the width portion and about 1 to 2 mm in height, and the thickness of the base plate is preferably about 0.5 to 5 mm. The wire preferably has a width of about 0.1 to 2.0 mm and a thickness (excluding ridges and grooves) of about 0.1 to 2.0 mm.

The bracket 2 can be made of a dental alloy material, ceramic, synthetic resin or the like as in the conventional case.

The synthetic resin is preferably polymethylmethacrylate, polyoxymethylene, polycarbonate or the like used as a so-called dental resin, which has high strength, low hygroscopicity, and does not cause plastic deformation even in a humid atmosphere at 80 ° C. However, it may be a synthetic resin such as polyolefin, polyvinyl chloride, or polyester, or a composite material obtained by mixing fibers such as ceramic, metal, or glass or a powdery filler into a polymer material thereof.

In the case of a metal bracket, it is preferable to coat the surface of the bracket with a ceramic or a synthetic resin to make the color inconspicuous such as white or yellowish white.

The wire 4 can be made of the same material as the bracket, but in particular creep (deformation due to stress)
It is desired to use a material that is less likely to cause stains, has a small coefficient of sliding friction, and is resistant to bacteria and dirt in the oral cavity. For example, synthetic resin filaments such as various polyester filaments, synthetic resin filaments reinforced by kneading inorganic crystal powder, organic powder or inorganic organic fine fibers into them, or synthetic resin tape molded together with glass fiber used as a core material, etc. It is preferably used.

Various experiments have revealed that many of the synthetic resin wire rods that have been stretched after extrusion have a reduced creep resistance against bending stress. Therefore, a wire is formed only by extrusion molding and used without being stretched. Alternatively, it is preferable to use a material that is once heated to a temperature near the recrystallization temperature, then gradually cooled and cured. The reason why the creep resistance (creep strength) is improved by such heat treatment is not clear, but the orientation of the molecules oriented by extrusion or the like is further disjointed and crystallized (non-oriented crystallization: fine crystals are randomly arranged). It is thought to be for the purpose of. For example, in the case of polyester, it is preferable to heat cure at 160 ° C. for about 30 seconds to 2 minutes.

Next, the method of use and the function of the straightening device constructed as described above will be explained.

First, as shown in FIG. 11, the bracket 2 is adhered to each tooth T, Ta through a base plate. In that case, the orientation or the like of the tooth Ta to be corrected is adjusted in advance by the dentist at the time of shaping the base plate so as to make the most of the elasticity of the wire.

Then, as shown in FIG. 9, the wire 4 is inserted into the wire locking groove of the bracket 2 in order. At that time, the tip of the wire 4 can be sequentially passed through the T-shaped opening on the side of the wire locking groove 3 fixed to the deepest tooth, but since the interval between the brackets 2 is narrow, FIG. Insert the wire 4 from the front opening of the wire locking groove 3 by folding the wire 4 in two with fingers or tweezers as shown in
It is convenient to push in.

As shown in FIG. 1, the inserted wire 4 returns to its original flat shape with elasticity, and both side edges of the wire 4 are gripped by the claw portions 2b.

The shape of the wire 4 is U-shaped in advance as shown in FIG. 11, and the portion where the correction force is to be exerted is bent with a smaller radius of curvature or partially deformed in an oblique direction. deep.

By mounting the wires 4 on all the brackets 2 as shown in FIG. 11, the mounting of the correction device is completed. That is, since the wire 4 and the claw portion 2b are firmly engaged, it is not necessary to bind the wire to the bracket with a wire or the like. Further, since the wire 4 itself hardly moves, both ends 10 and 11 thereof do not need to be fixed with a special cylindrical bracket as in the conventional case, and can be left free. If necessary, the ends of the wires may be folded back and fixed in the same shape by heat.

After mounting, the elastic reaction force of the wire is transmitted to the tooth Ta to be corrected through the bracket, and a force in the direction of arrow N (for example, about 20 to 200 g) is applied for a long period of time. Thereby, the tooth Ta gradually moves in the direction of arrow N.

When it is desired to give a corrective torque in the torsional direction to the tooth Ta, a predetermined torque can be given only by changing the direction of the bracket 2 of the tooth or the curved shape of the wire 4. As the teeth gradually move and the wire 4 returns to its free shape, the elasticity, ie, the orthodontic force, becomes weaker. Therefore, next, the series of brackets 2 is left as it is and replaced with a wire having higher rigidity.

At that time, the original wire 4 may be simply pulled out from the end portion or partially cut and pulled out.

A new wire (for example, a ridge as shown in FIG. 5)
The wire with 6 ) can be mounted as in FIG. 1 or a new wire can be connected to the end of the old wire and the new wire inserted while pulling out the old wire.

The above wire replacement is carried out once in a few weeks, if necessary, and as a whole, a few replacements take about half a year to 2 years.
After about a year of treatment, the dentition is corrected.

[0040]

According to the present invention, the fixing of the bracket becomes extremely easy and strong, and the workability of mounting is improved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view showing an embodiment of a correction device according to the present invention.

FIG. 2 is a schematic perspective view of the bracket in the apparatus of FIG. 1 viewed from the base plate side.

FIG. 3 is a schematic plan view showing an example of a mounting method of the apparatus of FIG.

FIG. 4 is a cross-sectional view showing another embodiment of the bracket according to the present invention.

FIG. 5 is a sectional view showing another combination of the bracket and the wire according to the present invention.

FIG. 6 is a cross-sectional view showing another combination of the bracket and the wire according to the present invention.

FIG. 7 is a sectional view showing still another combination of the bracket and the wire according to the present invention.

FIG. 8 is a cross-sectional view showing still another embodiment of the wire according to the present invention.

FIG. 9 is a partial cross-sectional perspective view showing an example of a wire mounting method according to the present invention.

FIG. 10 is a perspective view showing another embodiment of the device of the present invention.

FIG. 11 is a plan view showing an example of a mounted state of the orthodontic appliance of the present invention.

[Explanation of symbols]

 Ta, T tooth 2 Bracket 3 Wire locking groove 4 Wire 5 Base plate

Claims (5)

[Claims] 1. A bracket tooth comprising a series of brackets secured to individual teeth of a dentition having a wire locking groove, and a wire locked in the wire locking groove of the bracket. An orthodontic device having a base plate made of an easily plastically deformable resin on a fixed side surface , comprising:
The wire has a rectangular cross section and the wire locking groove
Orthodontic appliance having a T-shaped cross-section . 2. The orthodontic device according to claim 1, wherein the easily plastically deformable resin is a thermosetting resin. 3. The orthodontic device according to claim 1, wherein the easily plastically deformable resin is a photocurable resin. 4. The orthodontic device according to claim 1, wherein the easily plastically deformable resin is a thermoplastic resin. 5. The wire has a substantially T-shaped cross section.
The orthodontic device according to claim 1, wherein