JPS637220Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an orthodontic device used for treating dental malocclusion, and particularly to a wire holding device for attaching an orthodontic archwire.

In general, in dentistry whose main purpose is to treat dental malocclusion, wire holding devices are fixed to each tooth, and at least one orthodontic wire is sequentially fitted and fixed into these wire holding devices. Teeth are straightened using the elasticity of the wire.

Conventionally, a device in which a part of the wire holding device is rotatable so that the wire can be easily attached and detached without having to be fixed with a ligature wire each time is shown in FIGS. 1 and 2. There was something like this (Unexamined Japanese Patent Application Publication No. 1973-
No. 150894, Japanese Patent Application Publication No. 155640). In these figures, the wire holding device 1 has flanges 2, 2,
It consists of a holding eye 3 and a pin support part 4, and a shoulder 5 of the holding eye 3 serves as a mounting part for an archwire 6. Further, the pin support portion 4 has a closing protrusion 7, a support pin 8, and an elongated hole 9. Note that 10 is a band. In such a configuration, the pin gripper 1
1 into the elongated hole 9, rotate the pin support part 4 against the spring 12 to open the closing protrusion 7, insert the archwire 6 into the shoulder 5, and then tighten the pin support part 4 with the pin gripper 11 again. Rotate to close the closing projection 7.

However, in such a conventional wire holding device, since the support pin 8 is located outside the insertion position of the wire 6 and the distance a from the band 10 is long, when the pin support portion 4 is rotated, it is not possible to move vertically. The moment (M=Fa) generated on the adhesive surface increases due to the applied force F. By the way, band 10
When adhering to the teeth 13 of the wire holding device 1, it is not preferable to have too strong an adhesive force when removing or replacing the wire holding device 1. but,
In the conventional type, when the adhesive force is lowered, the force acting on the adhesive surface due to the moment becomes larger than the adhesive force, and the band 10 often comes off from the teeth 13.

In addition, since the pin support portion 4 protrudes beyond the wire 6, if it is used while being fixed to the tongue side, it may come into contact with the teeth during occlusion or feel poorly against the tongue, causing discomfort to the patient. It was hot.

The present invention has been made to improve the above-mentioned drawbacks, and includes fixing a bracket body having a wire insertion groove to a fixed substrate, and rotatably attaching a locking piece to the bracket body for opening and closing the wire insertion groove. The pivot point of the locking piece is located between the fixed base plate and the wire insertion groove and as close to the fixed base plate as possible. With this configuration, the moment generated on the adhesive surface of the fixed substrate with the teeth is reduced, the fixed substrate is difficult to peel off, and the tongue feeling is improved.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 10.

3 and 4 are a perspective view and a sectional view of the first embodiment. In these figures, reference numeral 14 denotes a bracket body, and this bracket body 14 is fixed to a thin plate-shaped fixed base plate 15 that is adhered to the teeth 13, and a locking piece 16 is provided on this bracket body 14 so as to be rotatable. It is being Upper and lower through holes 18 are bored in the fixed base 17 of the bracket main body 14 at positions as close as possible to the fixed base plate 15, and
A wire insertion groove 20 with one end open is formed on the outside by the engaging bent portion 19 and the fixed base portion 17 . A through hole 22 that matches the through hole 18 is bored in the locking base 21 of the locking piece 16, and is fixed to the bracket body 14 by a fixing means consisting of a bolt 23 and a nut 24. . A locking portion 25 for opening and closing the insertion groove 20 is formed protruding from the locking piece 16 .

In such a configuration, the bolt 23 and nut 24 are loosened, the locking piece 16 is rotated, the wire insertion groove 20 is opened, and the archwire 6 is inserted. After that, the locking portion 25 of the locking piece 16 is inserted into the wire insertion groove 20.
Close and tighten bolt 23 and nut 24.
Note that the protruding portion 26 at the tip of the bolt 23 can also be used as a hooking portion for a ligature wire. Note that when the through hole 18 on the side of the bracket main body 14 is a screw hole, the nut 24 becomes unnecessary.

FIG. 5 is a diagram showing a second embodiment. In this embodiment, when the width of the archwire 6 is large,
It can be used in place of the locking piece 16 in FIG. A locking portion 25 that is thick and thinner than the locking base 21 is formed at the upper end of the locking base 21 .

FIG. 6 is a diagram showing a third embodiment. In this embodiment, the engaging bent portion 19 is formed to protrude upwardly, and the locking portion 25 is formed shorter than in the first embodiment so as to be located inside the wire insertion groove 20.

FIG. 7 is a diagram showing a fourth embodiment. In this embodiment, the engaging bent portion 19 is formed long as in the third embodiment shown in FIG. 6, the locking portion 25 is bent into an L shape, and the wire insertion groove 20 is enlarged. be.

FIG. 8 is a diagram showing a fifth embodiment. In this embodiment, the fixed base 17 is formed higher than the fixed base 17 of the first to fourth embodiments, and the engaging bent portion 19
is a short example.

FIG. 9 is a diagram showing a sixth embodiment. In this embodiment, in the first, second, fourth, and fifth embodiments, the bracket main body 14 is made horizontally long, that is, the wire insertion groove 20 is formed long, and two locking holes are provided near both ends of the wire insertion groove 20. It is provided with pieces 16, 16.

FIG. 10 is a diagram showing a seventh embodiment. In this embodiment, two locking pieces 1 are used in the third embodiment.
6 and 16.

Among these embodiments, a suitable one is used depending on the thickness, cross-sectional shape, location of use, etc. of the archwire.

In the above embodiments, examples were shown in which bolts and nuts or only bolts were used as fixing members, but
The material is not limited to this, and may be a shaft, a pin, or other other members.

Since the present invention is constructed as described above, the distance between the adhesive surface of the fixed substrate and the fixing member can be made as small as possible, and when the fixing member fixes the locking piece to the bracket body, the adhesion is performed using vertical force. The moment generated on the surface can be made as small as possible. For example, if the thickness of the fixed board is 0.5 mm, the width of the wire insertion groove is 2 mm, and the width of the fixed base is 2 mm, then in the conventional example shown in Fig. 2, the distance a between the adhesive surface and the fixed member is 3.5 mm. Therefore, if the acting force is Fa, the moment M is M=3.5Fgmm. On the other hand, in the present invention, the distance b between the adhesive surface and the fixing member is 1.5 mm, and the moment M is 1.5 gmm. That is, according to the present invention, the moment generated on the adhesive surface can be suppressed to 1/2 or less, and even if the adhesive force is small, the fixed substrate will not separate from the teeth.

Furthermore, even when the fixing member protrudes from the locking piece or the bracket body, the fixing member is as close as possible to the tooth side, so if the teeth come into contact with each other during occlusion or the tongue comes into contact, there may be a problem. It is possible to achieve a very natural occlusion and tongue sensation similar to normal ones without feeling a sense of harmony, and to perform good orthodontic treatment.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional wire holding device, Figure 2 is a perspective view of a conventional wire holding device;
3 is a perspective view of the first embodiment of the wire holding device according to the present invention, FIG. 4 is a sectional view of the same as the above, and FIGS. The sectional views of the third, fourth and fifth embodiments, and FIGS. 9 and 10 are plan views of the sixth and seventh embodiments of the present invention, respectively. 14... Bracket body, 15... Fixed board,
16... Locking piece, 17... Fixed base, 19... Engagement bent portion, 20... Wire insertion groove, 21... Locking base, 25... Locking portion.

Claims (1)

[Claims for Utility Model Registration] (1) A bracket body having a wire insertion groove is fixed to a fixed substrate, and a locking piece for opening and closing the wire insertion groove is rotatably provided on the bracket body, An orthodontic device characterized in that the rotational fulcrum of the locking piece is provided between the fixed base plate and the wire insertion groove at a position as close to the fixed base plate as possible. (2) The orthodontic device according to claim 1, in which the locking piece comprises a locking base that is attached to the bracket body and a locking portion that is formed to have the same thickness and opens and closes the wire insertion groove. (3) The locking piece consists of a thick locking base that is attached to the bracket body, and a locking part that is thinner than the locking base and opens and closes while substantially expanding the width of the wire insertion groove. The orthodontic device according to claim 1 of the utility model registration claim. (4) The locking piece consists of a locking base that is attached to the bracket body, and a locking part that opens and closes while substantially expanding the width of the wire insertion groove that is bent into an L shape and is integrated with the locking base. The orthodontic device according to claim 1 of the utility model registration claim. (5) The bracket body includes a fixed base to which the locking piece is attached, and an engagement bent part that is integrated with the fixed base and protrudes outward, and then is bent 90 degrees toward the locking base to form a wire insertion groove. An orthodontic device according to claim 1, 2, 3 or 4 of the utility model registration claim consisting of: (6) The bracket body has a fixed base on which the locking piece is attached, and after protruding outward integrally with this fixed base, bend it 90 degrees until the end protrudes from the locking base and insert the wire insertion groove. Claims 1 and 2 of the utility model registration consisting of the formed engaging bent portion
The orthodontic device according to item 1, 3, or 4. (7) The bracket body consists of a fixed base on which the locking piece is attached, and after protruding outward integrally with this fixed base, the bracket body is bent 90 degrees until the end is located approximately in the middle of the locking base, and then the wire is attached. The orthodontic device according to claim 1 or 2, which comprises an engaging bent portion having an insertion groove formed therein. (8) Utility model registration claim Paragraph 1, in which the bracket body is formed wide and multiple locking pieces are arranged in parallel;
The orthodontic device according to item 2, 3, 4, 5, 6, or 7.