JPH05269148A - Tooth-straightening auxiliary implement - Google Patents

Abstract

PURPOSE:To easily execute attachment and detachment of a rubber band, etc., by constituting the auxiliary implement so that it has a wire detaining groove of the same shape substantially as a bracket, and also, has at least one piece of projection which is detained, and can slide along a wire. CONSTITUTION:In a bracket 2, a T-shape wire detaining groove 3 is formed by a base part 2a and a claw part 2b. The tooth-straightening auxiliary implement 5 has a wire detaining groove 6 of the same shape substantially as the bracket 2. Its detained state is the same as that of the bracket 2, and the auxiliary implement 5 can slide only in the direction running along a wire 4 on the wire 4. In an end part in the longitudinal direction of a claw part 5a of the auxiliary implement 5, a projection 7 is provided, an elastic body such as a rubber band 8, etc., is hooked thereto, and shrinkage force is obtained between the projection and a projection of the other auxiliary implement detained to its adjacent tooth. One of features of this auxiliary implement 5 is a point that the straightening device is assembled once and can be integrated even after it is installed in a tooth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an orthodontic appliance for parallel movement of teeth used in an orthodontic appliance.

[0002]

2. Description of the Related Art A conventional orthodontic device includes a bracket 52 having a groove (wire locking groove) 51 and a series of brackets 52 inserted into the groove as shown in FIG. It is composed of a supported wire 53 and a wire member 54 for securing the wire to a bracket. The cross-sectional shape of the wire 53 is usually circular, and depending on the case, a rectangular shape is used.

In this device, a bracket 52 is adhered to each tooth T of a dentition to be straightened, a wire 53 is arranged so as to pass through a groove 51 in a series of brackets, and the wire is moved in the direction to be straightened. The wire is fixed to the bracket with the wire rod 54 using the groove 55 on the side surface of the bracket 52 in a state where the wire is elastically deformed so that the elasticity of the wire acts.

In the conventional straightening device, the work of binding the wires 53 to the individual brackets 52 is extremely complicated, requires skill, and requires a long working time. Especially during the orthodontic period of several months, since the teeth gradually move and the elastic reaction force decreases, it is necessary to change to a wire having a high rigidity in order several times. Therefore wire 53
The burden on both the patient and the dentist is great with each replacement.

Further, in order to correct the twisting or inclination of the teeth, even when a torque is applied to the bracket using a wire having a rectangular cross section, it is difficult to integrate the wire and the bracket, and the torque is transmitted. Advanced techniques are required to tie wires.

Further, since the conventional wire is generally made of metal, it is very conspicuous during the wearing, the appearance is unsightly, and the wearer feels uncomfortable.

Further, a special cylinder-shaped bracket is required to fix both ends of the wire, which causes a problem of a large discomfort in the oral cavity.

The inventor of the present invention has solved such problems, developed an orthodontic appliance which is easy to put on and replace, and has less discomfort, and filed a prior application (Japanese Patent Application No. 3-67330).

As shown in FIG. 1, this orthodontic appliance has a series of brackets 2 each having a wire locking groove 3 fixed to each tooth T of the dentition to be orthodontic, and a wire engaging member of the bracket 2. It consists of one wire 4 locked in the stop groove 3,
The wire locking groove 3 has a T-shaped cross section, and the wire 4 is formed in a tape shape having flat side edges to be locked in the wire locking groove 3.

By the way, the teeth to be corrected include twisted and inclined teeth, double teeth and teeth with gaps, and it is necessary to move the teeth in parallel to correct the latter tooth. Further, in the process of correcting a twisted tooth, it may be necessary to translate the tooth.

When performing such correction by parallel movement of teeth, brackets fixed to adjacent teeth are connected by an elastic body (for example, rubber band) to obtain parallel movement force.

However, the bracket itself is small (approximately 1
(~ 5mm, width 1-5mm) It is difficult to put on rubber bands, and it may slip off with a little force.

[0013]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an orthodontic appliance used for orthodontic treatment by parallel movement, in which a rubber band or the like can be easily attached and detached.

[0014]

An orthodontic appliance 5 of the present invention comprises a series of brackets 2 secured to individual teeth of an orthodontic row having a wire locking groove 3, and a set of brackets of the bracket. Consisting of one wire 4 that is locked in the wire locking groove,
A wire orthodontic device, wherein the wire locking groove has a T-shaped cross section, and the wire is formed in a tape shape having flat side edges to be locked in the wire locking groove.
The bracket 2 has a wire locking groove 6 having substantially the same shape as that of the bracket 2 and has at least one protrusion 7 for locking, and is characterized in that it can slide along the wire.

[0015]

Functions and Examples Before explaining the orthodontic appliance of the present invention, an orthodontic appliance to which the auxiliary tool of the present invention is applied will be described with reference to FIGS.

FIG. 1 is a partial cross-sectional perspective view of an embodiment of an orthodontic device, in which a bracket 2 is fixed to a tooth T and a wire 4 is attached.
Shows the state of being locked in the wire locking groove 3 of the bracket.

The bracket 2 is composed of a plate-shaped base portion 2a to be bonded to the teeth T, and an L-shaped claw portion 2b projecting from the upper and lower ends of the base portion 2a so as to face each other. As a result, a T-shaped wire locking groove 3 is formed between the claw portions 2b.

Then, as shown in FIG. 2, the series of brackets 2 are respectively bonded and fixed to the row of teeth T including the tooth Ta to be moved. Each bracket 2 is provided on the surface of the tooth so that the elastic force of the wire 4 acts in the direction N in which the tooth 4 is to be moved at the tooth Ta to be moved, and the wire 4 is simply held at the tooth T that does not need to be moved. The position and orientation are set.

Since both side edges of the wire 4 are flat (FIG. 1), they are held in the T-shaped wire locking groove 3 of the bracket 2 also in the front-back direction. Therefore, even if the wire is not fixed with a wire, the wire is not displaced and the force in the front-back direction of the wire and the moment acting around the center line of the wire can be transmitted to the teeth. Since the wire does not need to be fixed, it is extremely easy to attach and replace.

The aid of the present invention is useful in translating teeth when using such orthodontic appliances (eg, FIGS. 5 and 6).

As shown in FIG. 3, the orthodontic appliance 5 has a wire locking groove 6 having substantially the same shape as the bracket, and the wire 6 is locked in the groove 6. The locked state is the same as the bracket, and the auxiliary tool 5 is slidable on the wire 4 only in the direction along the wire. The engaging groove 6 of the auxiliary tool 5 is formed in a T shape by the claw portion 5a and the base portion 5b, and in FIG. 3, a protrusion 7 is provided at the longitudinal end portion of the claw portion 5a. The protrusions 7 may be provided on both upper and lower sides as shown in FIG. 3, or only one of them may be provided.
In either case, the force exerted on the tooth can be adjusted by selecting the position and combination of the protrusions 7 (for example, FIG. 5). An elastic body such as a rubber band 8 is hung on the protrusion 7,
A contracting force is obtained between the protrusion of another auxiliary tool (see FIG. 5) locked to the adjacent tooth. Since the auxiliary tool 5 is slidable on the wire, a bracket fixed to the tooth plays the role of the fastener (FIGS. 4 and 5).

One of the features of the assisting device of the present invention is that the orthodontic device can be installed after being assembled and attached to the tooth. That is, as shown in FIG.
The wire 4 can be easily attached by inserting it into the wire locking groove 3 of the auxiliary tool 5 by bending the wire 4 from the width direction by bending it with a finger. Therefore, when the twisted tooth is first returned to the normal direction by the force of the bracket and the wire and then the tooth is translated, the tooth can be easily attached and detached. FIG. 5 shows the auxiliary tool 5 of the present invention.
Rubber band 8 in combination with bracket 2 and wire 4
Shows the condition when installed. The rubber bands 8 may be applied parallel or diagonally. FIG. 6 shows a schematic plan view when the auxiliary tool 5 and the bracket 2 of the present invention are attached to the tooth row as shown in FIG.

The auxiliary tool of the present invention is not limited to that shown in FIG.
It can take various forms.

For example, as shown in FIG. 7, the protrusion 7 and the recess 9 may be combined to improve the hanging of the rubber band, or the position of the protrusion 7 may be shifted to the bracket side as shown in FIG. Further, as shown in FIG. 9, the protrusion 7 may be provided by moving in the width direction of the side surface 10 of the auxiliary tool 5. By changing the positions of these protrusions, it is possible to adjust how the force is applied. In addition, the mounting direction of the auxiliary tool on the wire is as shown in FIGS.
The base portion may be placed on the front side, not limited to the front facing direction shown in FIG. The protrusion is usually formed on the side surface of the bracket so as to extend in the direction traversing the wire because of its strength and ease of manufacture, but any protrusion can be used as long as it can hook a rubber band.

Generally, the size of the auxiliary tool of the present invention is about 2 in length.
Select within the range of ~ 6mm, width about 1-5mm, height about 1-2mm.

Although the auxiliary tool of the present invention can be used without being fixed to the teeth, the fixed use is not excluded. Further, when the tooth correction is performed only by parallel movement, it is possible to provide a protrusion on the bracket, and the same effect can be obtained in terms of the tooth correction. However, the detachable auxiliary tool is more advantageous in terms of versatility of use and handling.

The bracket used in the present invention may be made of a dental alloy material, ceramic, synthetic resin or the like as in the conventional one.

As the synthetic resin, it is preferable to use polymethyl methacrylate, polyoxymethylene, polycarbonate or the like which is 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 in which a fiber such as ceramic, metal, or glass is mixed with a powdered filler in 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.

Although the wire can be formed of the same material as the bracket, it is desired to use a material that is particularly resistant to creep (deformation due to stress), 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 them with inorganic crystal powder, organic powder or inorganic / organic fine fiber, or synthetic resin tape molded with glass fiber used as a core material, etc. It is preferably used.

Various experiments have revealed that many synthetic resin wire rods stretched after extrusion have a reduced creep resistance against bending stress. Therefore, a wire is formed only by extrusion 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 slowly cooled and cured. The reason why the creep resistance (creep strength) is improved by such heat treatment is not clear, but the direction of the oriented molecules is further dissociated by the extrusion molding or the like 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.

Although the auxiliary tool of the present invention may be made of the same material as the bracket, it is not so high in strength because it is used for a relatively short period of time and is less likely to be fixed than the bracket. Good. Further, the base portion can be made relatively thin, and in this case, the attachment to the wire can be performed by bending the base portion and opening the locking groove.

Various orthodontic appliances using the assisting tool of the present invention have various aspects, which will be described below.

10-13 show schematic cross-sectional views of wire embodiments. In the embodiment shown in FIGS. 10 to 11, a ridge is provided on one surface of the wire 4. The ridges 11 increase the rigidity and durability of the wire. The size of the ridge can be variously changed according to the force applied to the tooth, and therefore, more appropriate treatment can be performed by exchanging the size according to the degree and stage of correction. The embodiment shown in FIG. 12 has a groove 12 on one surface of the wire 4.
Is provided. The groove 12 allows the wire to be flexed in the width direction at the time of mounting and facilitates mounting. The size of the groove can be appropriately changed depending on the material of the wire. In the embodiment shown in FIG. 13, the ridge 11 and the concave groove 12 are provided on the surfaces which face each other, and by adjusting the sizes of the ridge 11 and the concave groove, it is possible to provide appropriate rigidity and bending. it can. In FIG. 14, two ridges 11 and one groove 12 are provided. In FIG. 14, a groove may be provided between the two ridges.

As the bracket, as shown in FIG.
The base portion 2a may be directly bonded and fixed to the teeth, or, as shown in FIG. 15, the base plate 13 may be attached to the tooth fixing side surface of the base portion 2a.
May be provided. In this case, it is advantageous for mounting that the material of the base plate 13 is easy to process.

For example, an easily plastically deformable material such as a thermosetting resin such as an epoxy resin, an acrylic resin, or a phenol resin, a photocurable resin such as an epoxy resin, an acrylic resin, or a UV crosslinking resin, a polyolefin resin, or a polyester resin. , Made of thermoplastic resin such as polyamide, polyimide, polycarbonate, etc., press it against the tooth (or its plaster model) to be attached, mold it, and then cure by light or heat, then attach It becomes a bracket corresponding to a power tooth, and mounting becomes extremely easy.

In addition, the base plate material may be separately fixed to the pretooth and the bracket may be adhesively fixed to the base plate material.

[0038]

According to the orthodontic appliance of the present invention, it is possible to easily install the orthodontic device for the parallel movement of the teeth, and to adjust the direction and position of applying the force depending on the condition of the teeth. can do.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view showing an embodiment of a straightening device to which a straightening aid of the present invention is applied.

FIG. 2 is a partial cross-sectional perspective view showing an example of a mounted state of the device of FIG.

FIG. 3 is a partial cross-sectional perspective view showing an embodiment of the correction assisting tool of the present invention.

FIG. 4 is a partial cross-sectional perspective view showing an example of a method for mounting the auxiliary tool of the present invention.

FIG. 5 is a front view showing an example of a mounted state of the auxiliary tool of the present invention.

FIG. 6 is a plan view showing an example of a mounted state of a correction device using an auxiliary tool of the present invention.

FIG. 7 is a plan view showing another embodiment of the auxiliary tool of the present invention.

FIG. 8 is a plan view showing another embodiment of the auxiliary tool of the present invention.

FIG. 9 is a perspective view showing another embodiment of the auxiliary tool of the present invention.

FIG. 10 is a cross-sectional view showing another embodiment of the wire used in the present invention.

FIG. 11 is a sectional view showing another embodiment of the wire used in the present invention.

FIG. 12 is a sectional view showing another embodiment of the wire used in the present invention.

FIG. 13 is a sectional view showing still another embodiment of the wire used in the present invention.

FIG. 14 is a sectional view showing still another embodiment of the wire used in the present invention.

FIG. 15 is a perspective view showing another embodiment of the bracket used in the present invention.

FIG. 16 is a perspective view showing an example of a conventional orthodontic device.

[Explanation of symbols]

 T Tooth Ta Tooth to be corrected 2 Bracket 3 Wire locking groove 4 Wire 5 Orthodontic aid 6 Wire locking groove 7 Protrusion 8 Rubber band

Claims (1)

[Claims] 1. A series of brackets fixed to individual teeth of a dentition to be orthodontic provided with a wire locking groove, and a wire locked in the wire locking groove of the bracket, A parallel movement of teeth used in an orthodontic device in which the wire locking groove has a T-shaped cross section, and the wire is formed in a tape shape having a flat side edge to be locked in the wire locking groove. An orthodontic appliance for use, which has a wire locking groove having substantially the same shape as a bracket and has at least one protrusion for locking, and is capable of sliding along a wire. Auxiliary equipment.