JPH0621456Y2 - Orthodontic tools - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an orthodontic appliance suitable for orthodontic treatment of patients with open bite, which is a very difficult problem mainly in mixed orthodontic treatment. The present invention relates to an orthodontic appliance capable of correcting an open bite by forming a vertical cover (overbite: hereinafter referred to as an overbite) by positively utilizing the occlusal force of the.

[0002]

2. Description of the Related Art Due to recent advances in diagnostic techniques, open bite cases are classified into cases in which anterior teeth should be extruded to increase overbite and cases in which molars should be pressed to correct open bites. Yes, especially Japanese people often have a so-called high angle case with a long lower face value (that is, the mandibular cerebral skull is abruptly attached), and a lot of orthodontic treatment with vertical control is needed. Became known.

Despite such a situation, conventional orthodontic treatments for patients with open bite generally improve the open bite by compensatingly ejecting the front tooth part using a box-shaped rubber or a vertical rubber. The method of doing was widely adopted.

[0004]

[Problems to be Solved by the Invention] However, such orthodontic treatment is unsuitable for a case in which a molar is to be pressed down to correct an open bite, and an orthodontic appliance used at this time is not suitable. However, there is a drawback in that it has to be detachably manufactured according to the anterior teeth of each patient, and it takes time to provide an orthodontic appliance to the patient.

Further, in this type of orthodontic appliance, socket-like fitting portions having, for example, protrusions are fitted to both front teeth of the upper and lower jaws facing each other, and then annular rubber is hooked on the protrusions for attachment. However, since it is necessary to remove them in the reverse order, it takes time to attach and detach, and some patients feel discomfort peculiar to rubber when they are worn, and there is a problem that the wearability and the wearing feeling are not good for the patients. Further, there is a problem that it cannot be used in combination with other dental tools, and that it is not possible to concurrently perform dental treatment such as orthodontics of other parts during the wearing period.

The present invention has been made in order to solve the drawbacks of the above-mentioned conventional orthodontic appliances, is excellent in wearability and fit, and not only increases the overbite of patients with mixed open dental bite, It is also effective for orthodontic treatment of molars, and in addition, other parts of the dental treatment can be performed in parallel during the wearing period, and most of them can be mixed by selecting one size from large, medium and small. An object of the present invention is to provide an orthodontic appliance that can be adapted to patients with open dental bite.

[0007]

[Means for Solving the Problems] That is, according to the present invention, the molar fitting holes (2a, 3) into which the upper molars (6, 7) can be fitted.
An orthodontic appliance comprising a pair of left and right molar crown-bearing portions (2, 3) each formed with a) opened upward and a connecting portion (5) connecting these molar crown crown-bearing portions to each other. It is (1), and the molar contact portions (2b, 3b) having hardness that is hardly deformed by occlusal pressure are provided below the crowned portions of the respective molars.

Further, needle-like projections (2c, 3c) are planted on the inner surfaces of the molar fitting holes (2a, 3a).

Further, the bottom surfaces of the molar abutment portions (2b, 3b) are formed by applying an anti-slip concavo-convex treatment.

The connecting portion (5) is attached to the palate (10).
It is formed in an arch shape that can abut along, and is provided with a hole (5a) in the substantially central portion of the connecting portion.

[0011]

With the above-mentioned structure, the present invention reduces the lower molars (8, 9) especially by the occlusion of the patient with open bite.
It acts to reduce the vertical dimension and increase overbite.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of the orthodontic appliance according to the present invention, FIG. 2 is a sectional view taken along line AA of the orthodontic appliance shown in FIG. 1, and FIG. 3 is an orthodontic appliance shown in FIG. FIG. 4 is an enlarged cross-sectional view of the vicinity of the crown-attached portion that constitutes the.

As shown in FIGS. 1 and 2, an orthodontic appliance 1 according to the present invention is an integrally molded product made of soft synthetic resin, and has a pair of left and right molar tooth crowning portions 2 and 3 and these molars. It is composed of a connecting portion 5 for connecting the crowned portions 2, 3 to each other.

That is, the molar fitting portions 2 and 3 are formed with the respective molar fitting holes 2a and 3a opening upward, and the inner surfaces of the respective molar fitting holes 2a and 3a. As shown in FIG. 3, each has a predetermined length (for example, 1 to
A large number of needle-shaped protrusions 2c, 3c (about 1.5 mm) are planted. Further, as shown in FIG. 2, molar contact portions 2b, 3b having appropriate hardness that are hardly deformed by occlusal pressure are provided at the lower portions of the respective molar crowns 2, 3 respectively. The bottom surface of each of the molar contact portions 2b, 3b is subjected to anti-slip concavo-convex processing consisting of fine grid line-shaped depressions.

Further, between the molar crown-attached portions 2 and 3 is shown in FIG.
As shown in FIG. 2, an arch-shaped connecting portion 5 is provided so as to connect the molar crown attachment portions 2 and 3 to the left and right, and a circular hole 5a is formed substantially in the center of the connecting portion 5. Are pierced so as to penetrate vertically.

The orthodontic appliance 1 is made up of three large, medium and small sizes.
Three sizes are prepared, and it is possible to apply to most patients by selecting an orthodontic appliance 1 having an appropriate size according to the size of the upper jaw of a patient with open bite.

Since the orthodontic appliance 1 according to the present invention has the above-mentioned configuration, when performing orthodontic treatment of open bite using the orthodontic appliance 1, as shown in FIG. The orthodontic appliance 1 is mounted in the oral cavity. That is,
The connecting portion 5 is abutted along the palate 10, and the molar crowning portions 2 and 3 are crowned to the upper molars 6 and 7, respectively. Then, the upper molars 6 and 7 are fitted into the molar fitting holes 2a and 3a of the molar crowned portions 2 and 3, respectively, but the needle-like projections 2c are formed on the inner surfaces of the molar fitting holes 2a and 3a. Since 3c is implanted, the molar crown-attached portions 2, 3 do not easily come off from the upper molars 6, 7.

In this state, when an open bite patient occludes, the upper molars 6 and 7 and the lower molars 8 and 9 bite the molar contact portions 2b and 3b of the molar crowns 2 and 3. Upper jaw molars 6 and 7 and lower molars 8 and 9
(In particular, the lower molars 8 and 9) are pressed down in the direction of arrow B in FIG. As a result, the vertical intermaxillary distance (vertical dimension)
Becomes smaller, the overbite increases, and open bite is corrected properly.

At this time, as described above, the bottom surfaces of the molar contact portions 2b, 3b with which the lower molar teeth 8 and 9 come into contact with each other at the time of occlusion are subjected to the anti-slip unevenness treatment. It is possible to prevent occurrence of a situation in which 8 and 9 wobble.

Further, by applying the tongue tip to the circular hole 5a formed substantially in the center of the connecting portion 5, the tongue habit is corrected or prevented, and the correct swallowing action is acquired. Become.

[0022]

As described above, according to the present invention,
Molar fitting holes 2a, 3a into which upper molars 6, 7 can fit
And a pair of left and right molar crown-bearing portions 2 and 3 formed in such a manner as to open upwards, and these molar crown-bearing portions 2,
An orthodontic appliance 1 comprising a connecting part 5 for connecting 3 to each other, wherein a molar contact having a hardness such that it is hardly deformed by an occlusal pressure is made to contact the lower part of each of the molar crowning parts 2 and 3. Since the parts 2b and 3b are provided respectively, the lower molars 8 and 9 are pressed down by the occlusion of the patient with open bite,
Since the vertical dimension becomes smaller and the overbite increases, it is possible not only to increase the overbite in patients with mixed open-row bite, but also to perform the radial orthodontic treatment at the same time. Become. Moreover, since the pair of right and left molar crowns 2 and 3 are connected by the connecting portion 5, either one of the left and right molars is not lost, and the right and left molars can be treated at the same time. It is well balanced. Also, because of this structure, multibanded appliances (multibande
d appliances) can also be used together, and by arranging three types of sizes, large, medium and small, it can be easily and quickly applied to most patients with mixed open dental bite.

If needle-like projections 2c and 3c are implanted on the inner surfaces of the molar-fitting holes 2a and 3a, the crown-bearing portions 2 and 3 will be dislocated from the upper molars 6 and 7. The risk can be reduced, and the orthodontic appliance 1 can be stably held in the oral cavity during the orthodontic period.

Further, when the bottom surfaces of the molar contact portions 2b, 3b are subjected to anti-slip unevenness treatment, wobbling of the mandibular molars 8, 9 is prevented, and the correction state is more reliably maintained during the correction period. And it is performed stably.

Further, when the connecting portion 5 is formed into an arch shape which can be brought into contact with the palate 10 and the hole 5a is provided in the substantially central portion of the connecting portion 5, the patient puts the tongue tip on the hole 5a. As a result, tongue habits can be corrected and prevented, and the correct swallowing action can be acquired.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an orthodontic appliance according to the present invention.

FIG. 2 is a sectional view taken along line AA of the orthodontic appliance shown in FIG.

FIG. 3 is an enlarged cross-sectional view of the vicinity of a crown-cored portion of the orthodontic appliance shown in FIG.

[Explanation of symbols]

 1 ... Orthodontic tool 2, 3 ... Molar tooth crown attachment portion 2a, 3a .. Molar tooth fitting hole 2b, 3b .. Molar tooth contact portion 2c, 3c ..... …… Holes 6, 7 …… Upper molars 8, 9 …… Lower molars 10 …… Palatal palate

Claims (4)

[Scope of utility model registration request] 1. A pair of left and right molar crown mounting portions (2) each formed with upwardly opening molar fitting holes (2a, 3a) into which upper molars (6, 7) can be fitted. 3)
An orthodontic appliance (1) comprising: and a connecting portion (5) for connecting the molar crown-attached portions to each other, wherein the lower portion of each molar crown-attached portion is hardly deformed by occlusal pressure. An orthodontic appliance configured by providing respective molar contact portions (2b, 3b) having hardness. 2. The orthodontic appliance according to claim 1, wherein needle-like protrusions (2c, 3c) are implanted on the inner surface of the molar fitting holes (2a, 3a). 3. The orthodontic appliance according to claim 1 or 2, wherein the bottom surfaces of the molar contact portions (2b, 3b) are subjected to an anti-slip concavo-convex treatment. 4. The connecting part (5) is formed in an arch shape capable of abutting along the palate (10), and a hole (5a) is provided in a substantially central part of the connecting part. The orthodontic appliance according to claim 2 or claim 3.