JPH08150154A - Dentition correcting tool - Google Patents

Abstract

PURPOSE: To provide a dentition correcting tool having a lock pin to locate an arch wire inserted through a bracket having an arch wire inserting path, in which proper fixation of arch wire is always ensured by forming a lock pin insertion path in the bracket and the lock pin in arched shape. CONSTITUTION: A dentition correcting tool 1 has a bracket 3 which is fixed at treatment to the front surface of a tooth by an adhesive applied to the adhesion surface 9. The tool 1 is composed of the bracket 3 and a lock pin 4, and an arch wire 2 is inserted through a wire inserting path 7 formed in the bracket 3 as extending approx. in the horizontal direction. The lock pin 4 is inserted through a lock pin inserting path 8 furnished approx. in the vertical direction of the bracket 3. The lock pin 4 consists of a rod formed in an arched shape, while the lock pin inserting path 8 is shaped also in an arch having a radius of curvature equal to or some smaller than that of the lock pin 4. The lock pin inserting path 3 is located nearer the cog flank than the wire inserting path 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental orthodontic appliance.

[0002]

2. Description of the Related Art Poor dentition, such as random pile teeth and double teeth, is not only bad in appearance, but plaque easily accumulates in places with bad dentition, resulting in caries and alveolar pyorrhea. In the recent field of dental treatment, orthodontic treatment for patients with poor dentition has come to be widely used because of the cause.

An orthodontic treatment method involves fixing an orthodontic bracket to the surface of each tooth with an adhesive or the like, passing an archwire through each orthodontic bracket, and pressing the archwire with a restoring force of the archwire.・ By applying an external force such as pulling back and twisting, the dentition is displaced to the correct position and direction for correction.

FIG. 10A shows a conventional orthodontic bracket (bracket 52 and mounting wire 56) and arch wire 2.
10 (b) and (c) of FIG.
It is sectional drawing in the b line. The bracket 52 is adhered to the surface of a tooth (not shown) by an adhesive at its adhesive surface 52a, the arch wire 2 is fitted to the fixing base 52b provided on the bracket 52, and the mounting wire 56 is wound around the mounting wire groove 52c. The arch wire 2 is pressed and fixed to the bracket 52 by rotating and tightening 56c. Hereinafter, this orthodontic appliance is referred to as a conventional example.

As a treatment procedure for orthodontics, an orthodontic row in an irregularly disordered pile state is first roughly corrected as a first treatment (hereinafter referred to as a rough alignment step). The degree of fixation of the arch wire to the orthodontic appliance at this stage is not firm, and there is some play. Without such play, an excessive pressing force is applied to the teeth, which not only causes discomfort to the patient but also may cause local correction, which may cause the teeth to move to the correct position. Problems also occur from a broad perspective.

Therefore, generally, the arch wire 2 at the rough alignment stage has a round cross section, and the bracket 52 is used.
The fixing to the fixing base 52b is in a loose fixing state with play as described below. That is, as shown in FIG. 10B, when the circular arch wire 2 is used, it comes into point contact with the fixed base 52b of the square groove, and since the arch wire 2 has a circular cross section, its contact point. Is not easily fixed because it is easily changed by twisting the arch wire 2. Further, at the rough alignment stage, the fastening degree of the mounting wire 56 is also moderate. Therefore, the degree of fixing the arch wire to the orthodontic bracket is weak as a whole.

In this way, the teeth whose teeth are roughly arranged are
It is precisely corrected in the next treatment stage (hereinafter, referred to as a correct position correction stage). At this stage, the arch wire 2 having a rectangular cross section is used, and the mounting wire 56 is tightly wound to fix the arch wire 2 to the bracket 5.
Firmly press on 2 and fix. As shown in (c) of FIG. 10, when the rectangular arch wire 2 is used, the fixing base 5 for the square groove is formed.
Since it will be fitted exactly in surface contact with 2b, since the square arch wire 2 does not roll,
The torque according to the designed torque angle θ continues to be applied correctly, and the distortion of the tooth in the front-back direction can be corrected to the correct angle arrangement.

Various orthodontic appliances other than the above-mentioned conventional examples have been proposed. For example, JP-A-4-61
As shown in the front view of FIG. 8, the orthodontic appliance disclosed in Japanese Patent No. 855 is composed of a bracket 53 and a lock pin 54, and the archwire 2 is fixed to this to perform orthodontic treatment. Bracket 5 is used to fix arch wire 2.
By inserting the archwire 2 from above into the deep horizontal archwire groove 57 provided in the upper part 3 and inserting the lock pin 54 into the lock pin groove 58, the archwire 2 is prevented from coming off due to frictional resistance. I stopped at. After inserting the lock pin 54, the lower end 54a is bent so as not to come off.

As another orthodontic appliance, Japanese Patent Publication No. 2-5
As shown in the perspective view of FIG. 9 (a) and the side view (including a partial cross section) of FIG. 9 (b), the orthodontic appliance described in Japanese Patent No. 3057 discloses an archwire in an archwire groove 51 of a bracket 50. 2 is inserted, and then the lock pin 55 is inserted. At this time, the lock pin 55 is fixed by bending the lower end 55a after insertion, and the lock pin head 55b presses the arch wire 2. Figure 9
(C) is a front view of the vicinity of the head 55b of the lock pin 55.

[0010]

However, in the above-described conventional example, the bracket 52 is formed with a large number of irregularities, and in addition, the irregularities are further increased by the winding and fastening of the mounting wire 56. Since it easily accumulates and it is difficult to brush with a toothbrush, there is a problem that plaque accumulates and the inside of the mouth becomes unsanitary.

Regarding the above-mentioned conventional examples and conventional examples,
The problem of dental plaque is relatively minor because the shape of the treatment is relatively uneven at the rough alignment stage, but if you want to perform the treatment at the orthodontic position, you need to correct it as described below. However, there is a problem in that the torque cannot be accurately moved, and the lateral movement of the archwire cannot be stopped. The torque movement means rolling movement in the cheek-lingual direction.

The reason why the torque cannot be accurately moved in the conventional example and the conventional example will be described below. Figure 11
FIG. 11A is a side view (including a partial cross section) showing an orthodontic appliance of a conventional example (FIG. 8), showing a state where a rectangular arch wire is used, and FIG. 11B is a lock used at that time. It is a side view of the pin 54. In order to perform torque transfer in the correct position correction step, a square arch wire 2 is used, and the arch wire 2 is used as the tooth side surface 2a, labial side surface 2c, bottom side surface 2
b, it is necessary to fix it from the four surfaces of the upper side surface 2d so as not to float up. By fixing from the four surfaces in this way, it is possible to move the torque according to the design torque angle θ. However, in the case of the above-mentioned conventional orthodontic appliance, the lock pin 54 is fixed as described below. Since it does not become correct, the upper side surface 2d of the arch wire 2 may not come into contact with the lock pin 54, so that reliable fixing cannot be realized.

That is, although the lock pin 54 is stopped by bending the lower end portion 54a, it is impossible to make the inside of such a bending surface closely follow the lower surface of the bracket 53, and there is a gap at the bending portion A. It is unavoidable that this will occur. Therefore, only the width of the gap causes the lock pin 5
4 moves up and down, and the upper side surface 2d of the archwire cannot be pressed.

The archwire 2 can apply a stable torque only after all four surfaces are pressed, but if the lock pin 54 is lifted as described above, the position of the archwire 2 is displaced and the correct torque is obtained. Can not be attached. Moreover, the amount of lift of the lock pin 54 changes each time depending on the bending method of the lower end portion 54a at the time of treatment, so it is practically impossible to give a correct torque in consideration of the amount of lift. In addition, as for the problem of the lateral movement of the archwire, the lateral movement of the archwire cannot be stopped because the archwire 2 cannot be sufficiently pressed.

For this reason, in the conventional orthodontic appliance, if it is desired to apply torque or to stop the lateral movement of the arch wire, a supplementary fastening means, specifically, a ligation wire is required. Become. Then, as described in the conventional example of FIG. 10, unevenness is generated, which causes a problem that plaque is apt to be formed and the mouth becomes unsanitary.

Similarly, in the orthodontic appliance of the conventional example (FIG. 9), a gap is created at the portion A (see FIG. 9B) where the lower end 55a of the lock pin 55 is bent, so that the arch wire is formed. There is a problem that 2 cannot be pressed sufficiently, torque cannot be applied, etc. Therefore, there is a problem that a ligature wire is required, and plaque is attached, which becomes unsanitary.

The present invention has been made in view of the above problems. Accurate torque movement and lateral movement of the arch wire are not required even in the correct position correcting step of the treatment without the need for an auxiliary ligation wire. It is an object of the present invention to provide an orthodontic appliance that can be stopped and has less plaque.

[0018]

An orthodontic bracket according to the present invention comprises a bracket having an archwire insertion passage in a substantially horizontal direction, and a bracket which is closer to the tooth surface than the archwire insertion passage in a substantially vertical direction. An orthodontic appliance comprising a lock pin for inserting an arch wire into the side farther from the tooth surface by inserting the lock pin into the bracket, the lock pin having an arched shape, and the lock pin provided on the bracket for inserting the lock pin. The gist of the invention is that the insertion passage has the same or slightly smaller radius of curvature as the lock pin.

Further, it is preferable that the bracket has a tooth side member and a labial member joined and integrated with each other. In this case, the labial member has a groove portion for storing an archwire in a substantially horizontal direction. It has a vertical lock pin insertion groove that is shallower than the archwire storage groove and is curved in the arcuate shape, and the tooth flank side member corresponds to the archwire storage groove and is substantially horizontal in the groove. A horizontal protrusion having a protruding height that does not fill the groove, and a vertical protrusion that protrudes lower than the horizontal protrusion in a substantially vertical direction corresponding to the lock pin insertion groove, and the tooth flank side member It is desirable that the labial member be joined by pressure welding.

[0020]

According to the present invention, the bracket is provided with a substantially vertical insertion path for the lock pin, and the lock pin is inserted therethrough to hold down and fix the arch wire passed through the arch wire insertion path. Although the same as the conventional example, in the present invention, the lock pin is formed into an arc shape, the tooth side surface of the archwire is fixed by the lock pin, and the remaining three surfaces, that is, the upper surface, the lower surface and the labial surface are fixed by the inner surface of the archwire insertion passage. It is composed. The above three surfaces of the archwire are surrounded by the wall of the groove for accommodating the archwire in the archwire insertion passage so that no deviation occurs, and the remaining one surface is locked even if the lock pin moves a little up and down. Since the pressing force on the inner surface of the arch of the pin does not change and the archwire does not shift, as a result, even if the archwire is chewed and force is applied,
It can be firmly fixed from the surface. Therefore, it is possible to move the torque as designed.

In addition, since the lock pin is arcuate, when the polygonal (rectangular etc.) archwire is pressed, the tooth side of the archwire is pressed not at the surface but at the two corners of the archwire. , The arch wire can be pressed more firmly. The lock pin insertion passage has an arcuate shape having a radius of curvature which is the same as or slightly smaller than that of the lock pin, in accordance with the lock pin. With a slightly smaller radius of curvature, the tip of the lock pin will be inserted while being guided by the arcuate outer surface side of the lock pin insertion passage when the lock pin is inserted, so that the tip of the lock pin is caught in the corner of the arch wire. Because it does not float the insertion failure,
The treatment by the dentist can be performed more smoothly.

The bracket of the present invention has a complicated shape having two insertion passages intersecting each other inside. However, the bracket is composed of two members, a tooth flank side member and a labial side member, If the side member and the labial member are provided with groove portions corresponding to the two insertion passages, the bracket can be easily obtained by joining and integrating these.

[0023]

1 (a) is a front view showing an orthodontic appliance and an arch wire according to an embodiment of the present invention, and FIG. 1 (b) is a sectional view taken along line I-I thereof. Also, FIG. 1 (c)
FIG. 6 is a cross-sectional view showing how the bracket 3 is attached to the teeth 5. FIG. 2 is an enlarged cross-sectional view showing the vicinity of the arch wire of FIG. 1 (b). During the treatment, as shown in FIG. 1C, the bracket 3 is fixed to the front surface of the tooth 5 by the adhesive applied to the adhesive surface 9.

The orthodontic bracket 1 comprises a bracket 3 and a lock pin 4. The arch wire 2 is inserted through an arch wire insertion passage 7 provided in the bracket 3 in a substantially horizontal direction, and is provided in a substantially vertical direction of the bracket 3. The lock pin 4 is used by inserting it into the lock pin insertion passage 8. The bracket 3 has a substantially hemispherical shape and has a surface with few irregularities. The lock pin 4 is rod-shaped and arcuate, and the lock pin insertion passage 8 is also arcuate with the same or a slightly smaller radius of curvature than the lock pin 4 (that is, a sharp curve).

The lock pin insertion passage 8 is provided closer to the tooth surface than the arch wire insertion passage 7, and when the lock pin 4 is inserted, the arch wire 2 can be positioned farther from the tooth side. ing. That is, the bow-shaped outer surface (tooth side) of the lock pin 4 is supported by the lock-pin insertion passage 8, and the arch wire 2 is pressed toward the labial side by the bow-shaped inner surface of the lock pin 4, and the arch wire 2 holds its lip. The side surface 2c is pressed against the groove wall surface of the archwire insertion passage 7. In this way, the archwire 2 is the orthodontic appliance 1
On the contrary, it is firmly fixed, so that the force applied to the arch wire 2 is correctly transmitted to the orthodontic appliance 1.

The lower end 4a, especially the tip of the lock pin 4 may be made slightly thinner or the radius of curvature may be slightly curved so that the lock pin 4 can be easily inserted into the lock pin insertion passage 8. is there. FIG. 3 is a front view of the teeth showing a state in which the orthodontic appliance is used, and an archwire 2 is passed through each orthodontic appliance 1 attached to the tooth 5 to perform the orthodontics. In addition, 6 is a gum.

In the treatment, the thickness and shape of the arch wire 2 and the thickness of the lock pin 4 are variously selected according to the desired degree of fixation strength in each treatment process, and the fixation is made from loose fixation to firmness. Realize up to fixing. For example, for the width B (see FIG. 1B) at the intersection of the archwire insertion passage 7 and the lock pin insertion passage 8, the total thickness of the archwire 2 and the thickness V ₄ of the lock pin 4 is If it is thick enough, the arch wire 2 can be firmly fixed to the bracket 3, and if it is thin, it can be loosely fixed.

Conventionally, the ligation strength of the mounting wire is adjusted by the doctor's intuition to adjust the fixing degree of the arch wire 2, which often depends on the skill of the doctor.
In the present invention, the fixing strength is automatically set by selecting the thickness of the arch wire 2 or the lock pin 4, so that a certain fixing strength can be realized regardless of the skill of the doctor.

At the rough stage of treatment, the arch wire 2
Use a round shape, a thin square shape,
Alternatively, a thin lock pin 4 may be used to loosely fix the arch wire 2 to the bracket 3. Further, in some cases, the lock pin may not be used. In order to prevent the lock pin 4 from coming off spontaneously, the lock pin lower end 4a may be bent and used.

If it is desired to move the torque in the correct position correcting step, a square arch wire 2 is used. The size of the archwire 2 has a thickness corresponding to the archwire insertion passage 7 and can be fitted into the archwire insertion passage 7 exactly as shown in FIG. Then, the lock pin 4 is inserted into the lock pin insertion passage 8
Then, the arch wire 2 is fixed by pushing it from the tooth side toward the labial side. At this time, appropriate thicknesses of the arch wire 2 and the lock pin 4 are adopted so that the play can be firmly fitted without causing play.
Then, the lower end portion 4a is bent so as not to come off.

In the conventional example, due to the gap in the bent portion of the lower end of the lock pin, the lock pin cannot move up and down to sufficiently hold down the arch wire. However, in the present invention, the lock pin 4 is temporarily moved to the lower end 4a. Even if it is vertically displaced by the amount of the gap in the bent portion A, the lock pin 4 can continue to hold the archwire 2 as described below. That is, the portion C that was pressed at the beginning of the lock pin 4
However, even if it shifts to the lower end side by the above-mentioned gap, it will only be pressed by the new portion D, and its thickness V ₄ does not change, so the archwire 2 before and after shifting The pressing force does not change. Therefore, the archwire 2 is not loosely fixed, and the torque can be moved according to the torque angle θ.

The sizes of the arch wire 2 and the arch wire insertion passage 7 should be completely the same and should be made to be exactly the same, which makes it impossible to use the arch wire 2 through the insertion passage 7 in actual treatment. Therefore, the arch wire 2 has to be slightly thinner. From this, the upper side surface 2d of the arch wire 2,
Due to the gap formed between the labial side surface 2c, the bottom side surface 2b, and the archwire insertion passage 7, the torque angle θ attached to the archwire insertion passage 7 of the bracket 3 and the archwire 2
It may happen that the torque angles applied to the are slightly different. However, since the difference between the torque angles is not an unpredictable angle but a predictive calculation is possible, it is advisable to perform the torque movement in consideration of this angle.

Further, the orthodontic appliance of the present invention realizes a firm fixation of the arch wire as described in detail below. As shown in FIG. 2, since the lock pin 4 and the lock pin insertion passage 8 of the present invention have an arcuate shape, the archwire 2 is fixed to both corners of the tooth side surface 2a, that is, 2 of α and β shown in FIG. It will be held down by points. Considering the case of a straight lock pin, the arch wire 2 is pressed from the entire surface 2a of the tooth, but pressing on the entire surface is equivalent to pressing with one point, and when pressing with two points as in the present invention. It is possible to push the archwire 2 more firmly. Since the lock pin 4 is firmly fixed at two points as described above and does not easily come out, it is possible to use the lower end portion 4a without bending in some cases.

Next, the sectional shape of the lock pin 4 will be described. The width of the lock pin 4 (width W ₄ shown in FIG. 1) may be set to be slightly smaller than the width of the insertion passage 8 for lock pin (width W ₈ shown in FIG. 1) at all treatment stages. Recommended. By doing so, the left and right lateral sides of the lock pin 4 contact the side wall of the lock pin insertion passage 8,
There is no rattling in the lateral direction.

On the other hand, the depth of the lock pin 4 (width V ₄ shown in FIG. 1) depends on each stage of treatment as described above.
Used as thin width V ₄ when the desire gentle fixation, firmly want the archwire 2 and fixed using those width V ₄ is thick. That is, the cross-sectional shape of the lock pin 4 is a thin elliptical shape having a long lateral width W _{4 in the case} of loose fixation, and gradually becomes a more elliptical shape or a circular shape if stronger fixation is desired. Depth width V
_An elliptical lock pin 4 which is long in _four directions is used.

Further, it is recommended that the lock pin 4 and the lock pin insertion passage 8 have a polygonal cross section. In the case of a circular cross section, the lock pin 4 may rotate about the center of the circle.
Even if a rotational force is applied to the lock pin, it does not rotate by coming into contact with the inner wall of the lock pin insertion passage 8, so that it can be stably fixed without moving. FIG. 5 is a cross-sectional view showing the cross-sectional shapes of the lock pin 4 and the lock pin insertion passage 8, and is YY shown in FIG.
A portion corresponding to the vicinity of the lock pin 4 in a line cross section is shown.

The most recommended sectional shape of the lock pin 4 is a pentagon (see FIG. 5). In the case of a pentagon, the tooth side surface 4 a of the lock pin 4 contacts the tooth side inner wall of the lock pin insertion passage 8, and the diagonal corner portion γ of the tooth side surface 4 a contacts the archwire 2. As described above, on the tooth side of the lock pin 4, the surface 4a contacting the tooth side and / or the surfaces on both sides thereof contact the inner wall of the rectangular lock pin insertion passage 8 to block the rotation of the lock pin 4. Act on. On the other hand, on the labial side (archwire side) of the lock pin 4, since the archwire 2 is pressed by the corner portion γ, the archwire 2 can be firmly fixed as compared with the case of pressing by the surface. In addition, the bending direction when bending the lock pin lower end portion 4a is determined to be four directions in the case of a quadrangular cross section, and is limited to two directions on the long side in the case of a rectangle, which is inconvenient during treatment. However, in the case of a pentagon, the bending direction is relatively unrestricted, so the usability is good. On the other hand, in the case of a polygon having a large number of angles such as a heptagon or an octagon, it becomes close to a circle, and it is difficult to prevent the lock pin 4 from rotating. Therefore, a pentagonal cross section is most recommended.

Also, in the case where the lock pin 4 has a semicircular cross section, the surface of the lock pin 4 abuts against the inner wall of the lock pin insertion passage 8 to block the rotation of the lock pin 4 in the same manner as described above. The arch wire 2 can be firmly fixed at the circular vertex, which is a preferable shape.

Next, description will be made on the case where a thin rectangular wire is used as the arch wire 2 and a treatment for firmly fixing the arch wire 2 is desired. Depending on the treatment, there are rare cases where it is desired to perform the treatment using the thin rectangular arch wire 2 in the correct position correction step.
In that case, the archwire 2 has a square cross section with a short width in the lateral direction (corresponding to the B direction shown in FIG. 1B). With this arch wire 2, the bracket 3 shown in FIG.
In the case of using, the total thickness of the arch wire 2 and the thickness of the lock pin 4 is shorter than the width B, so that the arch wire 2 cannot be firmly fixed.

The bracket 63 shown in FIG. 6 is another embodiment which takes measures against the above problem. The bracket 63 of FIG. 6A corresponds to a cross section taken along the line I-I of FIG. 1A, and FIG. 6B is a top view of the bracket 63, and FIG.
6A is a sectional view taken along line NN shown in FIG. 6A, and FIG. 6D is a sectional view taken along line OO shown in FIG. 6A. The lock pin insertion passage 64 is provided with a thin groove 64a on its inner wall on the labial side, and the thin groove 64a is carved so as to connect the arcuate arc of the lock pin insertion passage 64 with a straight line.

When it is desired to firmly fix the arch wire 2 by using a thin rectangular wire, the mounting wire 92 is inserted into the narrow groove 64a of the lock pin insertion passage 64 and fastened as shown in FIG. When the mounting wire 92 passes through the narrow groove 64a, it comes into contact with the arch wire 2, so that the arch wire 2 can be firmly fixed.

In the case of fixing using the mounting wire 64,
Since there are many irregularities on the surface of the orthodontic appliance, dental plaque is likely to adhere, but this embodiment is to take measures against the rare cases of treatment as described above. In this case, as in the case of the embodiment shown in FIG. 1, since the surface has a shape with few irregularities, it is difficult for plaque to adhere, and the arch wire is pressed by the arched lock pin, so that firm fixing can be realized.

Next, an example of the bracket manufacturing method of the present invention will be described. To manufacture the bracket, first, a labial member and a tooth surface member of the bracket are produced, and these two members are joined and integrated to form an orthodontic bracket. 4 is a perspective view showing an example of a labial member and a tooth surface member of the bracket.
3A is a view of the tooth surface side member 10 and FIG. The labial member 1 shown in FIG.
1 and the tooth flank member 10 are shaped so that the torque angle θ of the finished bracket is 0 degree.

The labial member 11 is provided with a groove portion 17 for storing an archwire in a substantially horizontal direction, and a groove portion for inserting a lock pin, which is shallower than the groove portion 17 for storing an archwire in a substantially vertical direction and curved in the above-mentioned bow shape. 18 is provided. The tooth flank member 10 is provided with a horizontal protrusion 67 having a protruding height that does not fill the groove portion 17 in a substantially horizontal direction corresponding to the arch wire receiving groove portion 17, and the lock pin insertion groove portion 18 is provided. Correspondingly, a vertical ridge 68 protruding lower than the horizontal ridge 67 is provided in a substantially vertical direction.

The labial member 11 and the tooth flank member 10 are press-fitted to be integrated with each other to form the bracket 3. At the time of this pressure contact, the horizontal ridge 67 is fitted so as to push the archwire storage groove portion 17 and the vertical ridge 68 pushes the lock pin insertion groove portion 18 so as to be widened.
7 and 68 are joined by being sandwiched by the groove portions 17 and 18. At this time, the space formed by the arch wire storage groove portion 17 and the horizontal ridge 67 becomes the arch wire insertion passage 7, and the lock pin insertion groove portion 18 and the vertical ridge 6 are formed.
The space formed by 8 becomes the lock pin insertion passage 8.

In order to manufacture the above hollow bracket, another method by casting can be considered, but the cost is high in the case of casting, which is not suitable for mass production. However, in this respect, the cost can be reduced in the case of the method of joining and integrating the above two members.

Although a bonding method using an adhesive can be considered for joining, in this case, there is a concern that the adhesive may harm the human body. However, when joining by pressure welding as described above,
It is preferable as an orthodontic appliance to be used in the oral cavity, because there is no concern about the damage of the adhesive.

[0048]

As described above, the orthodontic appliance according to the present invention is
Even though the surface has a smooth shape with little unevenness, by selecting variously the thickness of the lock pin and the thickness and shape of the arch wire, various kinds of loose fixing to firm fixing can be realized. The orthodontic appliance can be used for all treatment stages from the rough alignment stage to the normal position correction stage, plaque is less likely to adhere, and the toothbrush can easily reach when brushing teeth for easy cleaning.

Further, by constructing the bracket of the present invention by integrally manufacturing the tooth surface side member and the labial side member, the bracket can be manufactured without using a costly manufacturing method such as casting. Further, if the method of press-fitting is adopted as the joining method, there is no concern about the damage of the adhesive and it is desirable for the orthodontic appliance in the oral cavity.

[Brief description of drawings]

1A is a front view showing an orthodontic appliance and an arch wire according to an embodiment of the present invention, FIG. 1B is a cross-sectional view taken along line I-I, and FIG. 1C is a bracket with teeth. Sectional drawing showing the state of attachment.

FIG. 2 is an enlarged cross-sectional view showing the vicinity of the arch wire of FIG. 1 (b).

FIG. 3 is a front view of teeth showing a state of using the orthodontic appliance of the present invention.

FIG. 4 is a perspective view showing an example of a labial member and a tooth surface member of the bracket in the present invention.

FIG. 5 is a cross-sectional view showing an example of a lock pin and a lock pin insertion passage according to the present invention.

FIG. 6 is a view showing another embodiment of the bracket in the present invention.

7 is a sectional view showing a state in which an arch wire is fixed to the bracket shown in FIG.

FIG. 8 is a front view showing a conventional orthodontic bracket.

FIG. 9 is a view showing a conventional orthodontic bracket.

FIG. 10 is a view showing a conventional orthodontic appliance.

FIG. 11 (a) is a side view showing a conventional orthodontic appliance,
(B) is a side view showing a conventional lock pin.

[Explanation of symbols]

 1 Orthodontic Orthodontic Appliance 2 Arch Wire 2a Teeth Side 2b Bottom Side 2c Labial Side 2d Top Side 3 Bracket 4 Lock Pin 4a Lower End 5 Teeth 6 Gum 7 Archwire Insertion Path 8 Lock Pin Insertion Path 9 Adhesive Surface 10 Tooth Side Member 11 Labial member 17 Arch wire storage groove 18 Lock pin insertion groove 67 Horizontal ridge 68 Vertical ridge

Claims (3)

[Claims] 1. A bracket having an archwire insertion passage in a substantially horizontal direction, and a bracket which is inserted into the bracket from a direction substantially vertical to a side closer to a tooth surface than the archwire insertion passage and positions the archwire on a side farther from the tooth surface. An orthodontic brace comprising a lock pin, wherein the lock pin has an arcuate shape, and the lock pin insertion passage provided in the bracket for inserting the lock pin has the same or slightly smaller radius of curvature than the lock pin. An orthodontic appliance having a bow shape. 2. The orthodontic bracket according to claim 1, wherein the bracket is formed by joining and integrating a tooth surface side member and a labial side member. 3. The labial member has a groove portion for storing an archwire in a substantially horizontal direction, and has a vertical lock pin insertion groove portion shallower than the groove portion for storing the archwire and curved in the bow shape. The tooth flank side member has a horizontal convex line having a protruding height that does not fill the groove in a substantially horizontal direction corresponding to the archwire storing groove section, and is substantially vertical corresponding to the lock pin insertion groove section. The orthodontic appliance according to claim 2, wherein the tooth flank side member and the labial side member are integrated by pressure contact fitting, the vertical braces protruding in a direction lower than the horizontal ribs.