Orthodontic appliances

Abstract

The present invention provides an orthodontic appliance that, when moving individual teeth in the dental arch in the direction in which they should be aligned, can securely and easily fix the teeth to be fixed with an extremely simple structure. [Solution] The upper jaw orthodontic appliance 10, which is the main body of the orthodontic appliance, has an anchor portion 21 that is fixed near the tooth to be fixed among the individual teeth of the upper jaw dentition 2 to be corrected, a fixing portion 22 that is fixed to the tooth to be fixed, and a rigid connecting portion 25 that is fixed to the fixing portion 22, with the connecting portion 25 connected to the anchor portion 21.

Description

Technical Field

[0001] The present invention relates to a dental orthodontic appliance provided with an auxiliary tool attached to an orthodontic appliance body for moving individual teeth in the dentition part in the direction in which they should be aligned.

Background Art

[0002] Conventionally, an appliance for correcting the dentition part includes, for example, a mouthpiece that is attached to the dentition part. Such a mouthpiece is formed in a shape that covers the entire upper dentition part or the entire lower dentition part. That is, when the mouthpiece is inserted into the oral cavity and attached onto the corresponding dental arch of the user, it has an open frame structure such that a tooth engagement member applies a corrective force to the arch (for example, see Patent Document 1).

[0003] In recent years, a means for moving teeth using the alveolar bone as a fixed source (implant anchor) has been devised and has become widespread as a device incorporated in a part of a multi-bracket system. As the implant anchor, a screw type is inexpensive and convenient, and is widely used because the surgical invasion during implantation is extremely small.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when moving individual teeth in the dentition part in the direction in which they should be aligned by the mouthpiece, all the teeth will move. Therefore, there are cases where teeth that are not desired to move during orthodontics, for example, molar teeth, are fixed, and other teeth are desired to be moved in the direction in which they should be aligned. In this case, means for simply fixing the molar teeth while minimizing the interference of the mouthpiece is required.

[0006] This invention was made in consideration of these circumstances, and aims to provide an orthodontic appliance that can reliably and easily fix teeth to be fixed with an extremely simple structure when moving individual teeth in the dental arch in the direction in which they should be aligned by the orthodontic appliance body. [Means for solving the problem]

[0007] To solve the above problem, the invention described in claim 1 is an orthodontic appliance for correcting individual teeth of the maxillary dentition and / or mandibular dentition with an orthodontic appliance body, comprising: an anchor portion embedded in the alveolar bone near the tooth to be fixed among the individual teeth of the maxillary dentition and / or mandibular dentition to be corrected by the orthodontic appliance body; a fixing portion fixed to the tooth to be fixed; and having rigidity The wire is bent into an L-shape via a bending section, and One end is fixed to the fixing part, A locking portion is provided at the other end, with an arc-shaped recess formed therein. It has a connecting part connected to the anchor part, and the mounting positions of the fixing part and the anchor part are offset in the height direction and offset in the lateral direction. The L-shaped connecting portion is fixed to the fixing portion at one end, and the locking portion at the other end is connected to the anchor portion. The locking portion is configured such that the side of the recess connected to the anchor portion has an open side of the arc-shaped recess in the direction in which the teeth are not to be moved, and the recess is locked to the anchor portion from this open side. It is characterized by having this feature.

[0008] Furthermore, the invention described in claim 2 is characterized in that, in addition to the configuration described in claim 1, the connecting portion is provided with a locking portion that restricts movement in the direction in which the teeth are not to be moved, while allowing movement in other directions.

[0009] Furthermore, the invention described in claim 3 is, 1 In addition to the configuration described above, The fixing portion is formed such that the surface opposite to the surface fixed to the tooth is a smooth, arc-shaped convex surface. It is characterized by being.

[0010] Furthermore, the invention described in claim 4 is characterized in that, in addition to the configuration described in claim 1, the fixing portion is fixed by bonding it to the tooth to be fixed with an adhesive, and a metal mesh is provided on the surface that is bonded to the tooth to be fixed.

[0011] Furthermore, the invention described in claim 5 is,1 In addition to the configuration described above, the connecting part is made of a cobalt-chromium wire. Naru features 1 The orthodontic appliance described above. [Effects of the Invention]

[0012] According to the invention described in claim 1, the vicinity of the tooth to be fixed alveolar bone to implantation The anchor part and the fixing part that is fixed to the tooth to be fixed, Having rigidity and one end The other end is fixed to the aforementioned fixing part, Connected to the aforementioned anchor portion It has a connecting part, The mounting positions of the fixing portion and the anchor portion are offset in the height direction and also offset in the lateral direction, causing the connecting portion to bend along the gingival region. Therefore, when moving individual teeth in the dental arch in the direction they should be aligned using the orthodontic appliance itself, it becomes possible to securely and easily fix the teeth that need to be fixed with an extremely simple structure.

[0013] Furthermore, according to the invention described in claim 2, the connecting portion is provided with a locking portion that restricts movement in the direction in which the tooth is not to be moved, while allowing movement in other directions. This ensures reliable transmission of pressing force in one direction, while allowing release of force in other directions. As a result, the anchor portion fixed near the tooth to be fixed becomes less likely to come loose, thereby increasing reliability.

[0014] Furthermore, according to the invention described in claim 3, Since the fixing portion has a smooth, arc-shaped convex surface on the side opposite to the surface that is fixed to the tooth, discomfort can be prevented even if the inside of the cheek comes into contact with the main body.

[0015] Furthermore, according to the invention described in claim 4, the fixing part is fixed by bonding it to the tooth to be fixed with an adhesive, and since a metal mesh is provided on the surface that is bonded to the tooth to be fixed, a large amount of adhesive can enter into the metal mesh, making it possible to further enhance the bonding effect.

[0016] Further, according to the invention described in claim 5, the connecting portion is made of a cobalt-chromium wire, and this wire is bent along the gingival portion so as to restrict movement in a direction in which it is not desired to move from the fixing portion to the locking portion. Therefore, it is possible to efficiently connect the tooth to be fixed and the anchor portion, and it is also easy to clean.

Brief Description of Drawings

[0017] [Figure 1] FIG. 8 is a perspective view showing a state in which a dental orthodontic appliance according to an embodiment of the present invention is attached to an upper dental arch portion. [Figure 2] FIG. 11 is an enlarged view showing the anchor portion, the fixing portion, and the connecting portion of the dental orthodontic appliance in FIG. 1. [Figure 3] FIG. 14 is an enlarged perspective view showing the anchor portion in FIG. 2. [Figure 4] FIG. 17 is an enlarged front view showing the fixing portion, the connecting portion, and the locking portion in FIG. 2. [Figure 5] FIG. 20 is an enlarged rear view showing the fixing portion, the connecting portion, and the locking portion in FIG. 2. [Figure 6] FIG. 23 is a perspective view showing a state in which a dental orthodontic appliance according to a first modification of an embodiment of the present invention is attached to an upper dental arch portion. [Figure 7] FIG. 26 is a perspective view showing a state in which a dental orthodontic appliance according to a second modification of an embodiment of the present invention is attached to an upper dental arch portion.

Mode for Carrying Out the Invention

[0018] Hereinafter, an embodiment of a dental orthodontic appliance according to the present invention will be described. [One Embodiment of Dental Orthodontic Appliance] FIGS. 1 to 5 show one embodiment of a dental orthodontic appliance according to the present invention.

[0019] Figure 1 is a perspective view showing an orthodontic appliance according to one embodiment of the present invention attached to the maxillary dentition. Figure 2 is an enlarged view showing the anchor portion, fixing portion, and connecting portion of the orthodontic appliance in Figure 1. Figure 3 is an enlarged perspective view showing the anchor portion in Figure 2. Figure 4 is an enlarged front view showing the fixing portion, connecting portion, and locking portion of Figure 2. Figure 5 is an enlarged rear view showing the fixing portion, connecting portion, and locking portion of Figure 2.

[0020] In the following embodiments, the orthodontic appliance, which serves as the main body of the orthodontic appliance, is inserted into the oral cavity and attached to the maxillary and / or mandibular dentition. The front teeth side is referred to as the anterior (mesial) side, the back teeth side as the posterior (distal) side, the lingual side as the medial side, and the buccal side as the lateral side. Here, the anterior teeth consist of the left and right central incisors, left and right lateral incisors, and left and right canines. The posterior teeth consist of the left and right first and second premolars and left and right first to third molars.

[0021] Furthermore, the following embodiment describes an example in which the maxillary orthodontic appliance, as the main body of the orthodontic appliance, is attached to the maxillary dentition.

[0022] As shown in Figure 1, the maxillary orthodontic appliance 10, which serves as the main body of the orthodontic appliance in this embodiment, is a mouthpiece type that is inserted into the oral cavity 1 and attached to the maxillary dentition 2. The maxillary orthodontic appliance 10 in this embodiment is an aligner that is attached to the maxillary dentition 2 to expand the maxillary dentition 2 laterally and move the individual teeth of the maxillary dentition 2 in the direction in which they should be aligned.

[0023] The maxillary orthodontic appliance 10 of this embodiment is integrally molded from an elastic resin material to a thickness of, for example, 1 mm. Specifically, the resin material is selected from, for example, polyurethane or other urethane resins, silicone resins, polyolefin resins, styrene resins, and acrylic resins. The resin material is preferably colorless and transparent or milky white, so that when inserted into the oral cavity 1, it is not noticeable when attached to the maxillary dentition 2 and has excellent aesthetics. The maxillary orthodontic appliance 10 is a molded product (aligner) that is shaped to gradually move the individual teeth of the maxillary dentition 2 in the direction in which they should be aligned. The maxillary orthodontic appliance 10 is prepared in stages, for example, by preparing multiple appliances of different sizes or different hardnesses and replacing them regularly to advance orthodontic treatment.

[0024] The maxillary orthodontic appliance 10 has the hardness to cover all the teeth of the maxillary dentition 2 in the oral cavity 1, namely the anterior teeth 4 and posterior teeth 5 of the maxillary dentition 2, and maintain a predetermined shape. The maxillary orthodontic appliance 10 is formed in a shape that follows the dental arch of the maxillary dentition 2, covering the crowns of the anterior teeth 4 and posterior teeth 5, and extending to the gingival portion 6 located on the gingival side.

[0025] The orthodontic aid 20 of this embodiment is used to fix teeth that need to be fixed (hereinafter described as including teeth on both the left and right sides) during orthodontic treatment in which the individual teeth of the upper jaw dentition 2 are moved in the direction in which they should be aligned by the upper jaw orthodontic appliance 10, for example, the molars 5 and the teeth in front of and behind them.

[0026] Specifically, as shown in Figures 1 and 2, the orthodontic aid 20 comprises an anchor portion 21, a fixing portion 22, a connecting portion 25, and a locking portion 30. The fixing portion 22, the connecting portion 25, and the locking portion 30 are connected in a continuous manner, and the locking portion 30 is connected to the anchor portion 21 so as to lock into place.

[0027] The anchor portion 21 is a fixation source that is fixed near the tooth to be fixed, for example, among the individual teeth of the maxillary dentition 2 that are to be corrected by the maxillary orthodontic appliance 10. As shown in Figure 3, the anchor portion 21 is a titanium alloy screw, for example, with a diameter of about 1.4 to 2 mm and a length of about 6 to 10 mm. The anchor portion 21 is fixed by being embedded in the alveolar bone located below the gingival portion 6 near the tooth to be fixed.

[0028] As shown in Figures 4 and 5, the fixing portion 22 is fixed by adhesive to the tooth to be fixed, for example, the molar 5, which is the second molar, among the teeth that are moved in the direction to be aligned by the maxillary orthodontic appliance 10. For this adhesive, for example, epoxy resin-based, acrylic resin-based, urethane resin-based, cyanoacrylate-based, polyurethane resin-based adhesives can be used.

[0029] As shown in Figure 5, the fixing portion 22 has a metal mesh portion 23 on the surface (back side) that is bonded to the tooth to be fixed, and a main body portion 24 on the surface (front side) opposite to the metal mesh portion 23 (buccal side). Since this main body portion 24 is on the buccal side, its surface is formed as a smooth, arc-shaped convex surface. This prevents discomfort even if the inside of the cheek comes into contact with the main body portion 24.

[0030] As shown in Figures 4 and 5, the connecting portion 25 is made of a cobalt-chromium wire with a circular cross-section and a diameter of 0.6 mm, one end of which is fixed to the metal mesh portion 23 of the fixing portion 22 by brazing, a bent portion 26 is formed in the middle portion which is bent along the surface of the gingival portion 6, and a locking portion 30 is provided at the other end.

[0031] As shown in Figures 4 and 5, the locking portion 30 has a bifurcated arc-shaped recess 31, and the shorter of these two prongs, the short wire 32, is fixed by electric welding to the long wire 33 which is continuous from the fixing portion 22 through the bending portion 26. The bifurcated recess 31 is inserted into the shaft portion 21a of the anchor portion 21, thereby connecting the locking portion 30 to the anchor portion 21.

[0032] The long wire 33 has a bent portion 26 formed along the surface of the gingival portion 6, which restricts movement in directions that are not desired, from the fixing portion 22 to the locking portion 30.

[0033] Next, the operation of the orthodontic appliance of this embodiment will be explained.

[0034] In this embodiment, the maxillary orthodontic appliance 10 is used as an aligner and is designed to gradually move the individual teeth of the maxillary dentition 2 in the direction in which they should be aligned. After the orthodontic aid 20 is attached, the maxillary orthodontic appliance 10 is inserted into the oral cavity 1 and fitted onto the maxillary dentition 2. During this orthodontic treatment, as shown in Figure 1, suppose there is a tooth in the maxillary dentition 2 that you do not want to move, for example, the molar 5 of the second molar that should be fixed in place. In this case, for example, the molar 5 of the first molar is extracted.

[0035] As shown in Figure 2, the anchor portion 21 of the orthodontic aid 20 is first embedded and fixed in the alveolar bone located below the gingival portion 6 near the molar 5 of the second molar to be fixed, so that the anchor portion 21 becomes the anchoring source. Then, the length of the connecting portion 25, which has a bent portion 26, is set to correspond to the distance between the anchor portion 21 and the molar 5 to be fixed.

[0036] Next, one end of the connecting portion 25 is fixed to the metal mesh portion 23 of the fixing portion 22 by brazing, while the short wire 32 is fixed to the long wire 33 of the connecting portion 25 by electric welding, thereby forming a locking portion 30 with a bifurcated recess 31.

[0037] Furthermore, an adhesive (not shown) is applied to the metal mesh portion 23 of the fixing portion 22 to fix the fixing portion 22 to the molar 5 to be fixed, and the bifurcated recess 31 of the locking portion 30 is inserted into the shaft portion 21a of the anchor portion 21. At this time, since the curvature of the bifurcated recess 31 is greater than the curvature of the shaft portion 21a of the anchor portion 21, the bifurcated recess 31 comes into local contact with the shaft portion 21a of the anchor portion 21.

[0038] Furthermore, in this embodiment, the long wire 33 and short wire 32 forming the locking portion 30 are formed with a circular cross-section, while the shaft portion 21a of the anchor portion 21 is also formed with a circular cross-section. Therefore, the locking portion 30 is connected to the anchor portion 21 by point contact between the circumferential surface of the shaft portion 21a and the circumferential surface of the long wire 33 or the short wire 32, so as to intersect. Thus, the fixing portion 22, connecting portion 25, and locking portion 30 of the orthodontic aid 20 can be securely and easily fixed between the molar 5 to which the locking portion 30 should be fixed and the anchor portion 21.

[0039] Here, since adhesive is applied to the metal mesh portion 23 of the fixing portion 22 and the fixing portion 22 is fixed to the molar 5 to be fixed, a large amount of adhesive can penetrate into the metal mesh portion 23, making it possible to increase the adhesive strength of the fixing portion 22 to the molar 5 to be fixed.

[0040] Furthermore, in this embodiment, the locking portion 30 is not completely integrated and fixed to the anchor portion 21. Instead, a portion of the bifurcated recess 31 of the locking portion 30 locally contacts the shaft portion 21a of the anchor portion 21, restricting movement in the direction in which the tooth is not desired, while allowing movement in other directions. That is, as shown in Figures 2 and 4, the locking portion 30 in this embodiment reliably transmits a force F applied in one direction (the direction in which the tooth is not desired), but dissipates any force applied in other directions. Therefore, the connecting portion 25 has sufficient rigidity to reliably transmit the force F applied by the locking portion 30 in one direction.

[0041] Conventional implant anchors become prone to detachment and fallout when subjected to repeated forces from various directions. If the aforementioned implant anchor detaches, it needs to be re-implanted into the alveolar bone, resulting in a highly invasive surgical procedure for the patient.

[0042] Therefore, in this embodiment, the locking portion 30 reliably transmits a force F applied in one direction, but releases any force applied in other directions, making it difficult for the anchor portion 21 to come loose and resulting in a very minimally invasive procedure.

[0043] Furthermore, since the connecting portion 25 has a bent portion 26 that is bent at approximately 90 degrees, the molar 5 to be fixed can be efficiently locked to the anchor portion 21, and cleaning is also made easier.

[0044] As described above, the orthodontic aid 20 of this embodiment has an anchor portion 21 fixed near the tooth to be fixed, a fixing portion 22 fixed to the tooth to be fixed, and a connecting portion 25 fixed to the fixing portion 22 and having a predetermined rigidity, and the connecting portion 25 is connected to the anchor portion 21, so when the maxillary orthodontic appliance 10 moves the individual teeth of the maxillary dentition 2 in the direction to be aligned, it is possible to fix the tooth to be fixed reliably and easily with an extremely simple structure.

[0045] Furthermore, according to this embodiment, the connecting portion 25 is provided with a locking portion 30 that restricts movement in the direction in which the tooth is not to be moved, while allowing movement in other directions. This ensures that pressing force in one direction is reliably transmitted, while allowing release of force in other directions. As a result, the anchor portion 21, which is fixed near the tooth to be fixed, becomes less likely to come loose, thereby increasing reliability.

[0046] Furthermore, according to this embodiment, since the locking portion 30 is provided with a recess 31 that is inserted into the anchor portion 21, the locking portion 30 can be easily attached to the anchor portion 21.

[0047] Furthermore, according to this embodiment, the fixing portion 22 is fixed by bonding it to the tooth to be fixed with adhesive, and since the metal mesh portion 23 is provided on the surface that is bonded to the tooth to be fixed, a large amount of adhesive can enter the metal mesh portion 23, making it possible to further enhance the bonding effect.

[0048] Furthermore, according to this embodiment, the connecting portion 25 is made of a cobalt-chromium wire, and this wire is bent along the surface of the gingival portion 6 to restrict movement in the direction that is not desired from the fixing portion 22 to the locking portion 30. This makes it possible to efficiently connect the tooth to be fixed with the anchor portion 21, and also makes cleaning easier.

[0049] In the above embodiment, we described an example where the teeth that should not be moved, i.e., the molars 5 that should be fixed, were designated as the second molars among the individual teeth of the maxillary dentition 2. However, when the left and right first premolars of the maxillary dentition 2 are extracted, anterior (mesial) movement of the molars is likely to occur during orthodontic retraction, which involves moving the front teeth backward. In particular, it is also possible to prevent anterior (mesial) movement by attaching the orthodontic aid 20 of this embodiment to the left and right first molars of the maxillary dentition 2. [First modified example of one embodiment of an orthodontic appliance] Figure 6 is a perspective view showing an orthodontic appliance according to a first modified example of one embodiment of the present invention attached to the maxillary dentition. Parts identical to or corresponding to those in the above embodiment are denoted by the same reference numerals. The same applies to other modified examples.

[0050] As shown in Figure 6, in the first modified example, contrary to the above embodiment, the teeth that should not be moved, i.e., the teeth that should be fixed, are the anterior teeth 4 of the maxillary dentition 2. In this case, the second premolars of the maxillary dentition 2 are often extracted. In this case, by attaching the orthodontic aid 20 to the first premolars, it is possible to prevent the blocks of anterior teeth 4 of the left and right first premolars of the maxillary dentition 2 from moving posteriorly (distally).

[0051] In the first modified example, the orthodontic aid 20 is attached to the first premolar in a state that is reversed left to right compared to the above embodiment. That is, in the first modified example, as shown in Figure 6, the connecting portion 25 extends from the fixing portion 22 toward the gingival portion 6 and bends toward the rear (distal) direction at the bending portion 26, and the locking portion 30 provided at the tip of the connecting portion 25 is connected to lock with the anchor portion 21.

[0052] Thus, in this first modified example, the orthodontic aid 20 can prevent the anterior teeth 4 from moving posteriorly (distally) without interfering with orthodontic treatment using the maxillary orthodontic appliance 10. [Second variation of one embodiment of an orthodontic appliance] Figure 7 is a perspective view showing a dental orthodontic appliance according to a second modified example of one embodiment of the present invention attached to the maxillary dentition.

[0053] As shown in Figure 7, in the above embodiment and the first modification, the orthodontic aid 20 was used to prevent movement of the tooth to be fixed, but in the second modification, it is also used to prevent tooth intrusion. Specifically, the second modification is an example of preventing intrusion of the molar 5 of the second molar, in which a fixing part 22 is fixed to the molar 5 of the second molar, a connecting part 25 extends from the fixing part 22 in the anterior (mesial) direction and bends at a bent part 26, and further extends toward the gingival part 6, and a locking part 30 provided at the tip of the connecting part 25 is connected to the anchor part 21 so as to lock into place.

[0054] Thus, in this second modification, it becomes possible to prevent tooth intrusion by the orthodontic aid 20 without interfering with orthodontic treatment with the maxillary orthodontic appliance 10.

[0055] In the second modification, it was used to prevent tooth intrusion, but it can also be used for retention to prevent teeth that have been moved by orthodontic treatment from returning to their original position.

[0056] In the above embodiments and their variations, a bent portion 26 is formed in the approximate middle of the wire of the connecting portion 25, which bends along the surface of the gingival portion 6. However, the shape of the wire of the connecting portion 25 may be changed as appropriate depending on the application. [Other embodiments of the invention] Although one embodiment and several variations have been described, these embodiments and variations are presented as examples and are not intended to limit the scope of the invention. These embodiments and variations can be carried out in a variety of other forms, and various omissions, substitutions, modifications, and combinations can be made without departing from the spirit of the invention. These embodiments and variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents.

[0057] In the above embodiments and their variations, an example was described in which the maxillary orthodontic appliance 10 is attached to the maxillary dentition 2 and orthodontic aids 20 are provided on the molars 5 to be fixed in the maxillary dentition 2. However, the invention is not limited to this, and a mandibular orthodontic appliance may be attached to the mandibular dentition and orthodontic aids 20 may be provided on the teeth to be fixed in the mandibular dentition. Alternatively, the maxillary orthodontic appliance 10 and the mandibular orthodontic appliance may be attached to the maxillary dentition 2 and the mandibular dentition, respectively, and orthodontic aids 20 may be provided on the teeth to be fixed in the maxillary dentition 2 and the mandibular dentition, respectively.

[0058] Furthermore, although the above embodiments and their respective modifications describe the maxillary orthodontic appliance 10 as the main body of the orthodontic appliance in an example where it is applied to a mouthpiece inserted into the oral cavity 1 and attached to the maxillary dentition 2, the main body of the orthodontic appliance of the present invention is not limited to mouthpieces, but can also be applied to wire orthodontics, in which brackets are bonded to the teeth and wires are passed through the brackets to move the teeth in stages. Therefore, the orthodontic aids 20 of the above embodiments and their respective modifications can be easily added and attached without interfering with orthodontic treatment.

[0059] Furthermore, in the above embodiments and their respective modifications, the material and shape of the orthodontic aid 20 may be made of any suitable material, as long as it can be inserted into the oral cavity and has a similar function.

[0060] In the above embodiments and their variations, examples were described in which the teeth to be fixed or the teeth to prevent intrusion movement were teeth on both the left and right sides. However, the invention is not limited to this, and teeth on only one side may be used. [Explanation of Symbols]

[0061] 1 oral cavity 2. Maxillary dentition 4 Front teeth 5 molars 6. Gingival region 10. Upper jaw orthodontic appliance (orthodontic appliance body) 20 Orthodontic aids 21 Anchor section 21a Shaft part 22 Fixed part 23 Metal mesh section 24 Main body 25 Connection part 26. Bending section 30 Locking part 31 Recess 32 Short wires 33 Long wire

Claims

1. An orthodontic appliance that corrects individual teeth in the upper and / or lower jaw dentition using the appliance body, An anchor portion is embedded in the alveolar bone near the tooth to be fixed, among the individual teeth of the upper and / or lower dentition that are to be corrected by the orthodontic appliance body, A fixing part fixed to the tooth to be fixed, A rigid wire is bent into an L-shape via a bending portion, one end of which is fixed to the fixing portion, and the other end is provided with a locking portion having an arc-shaped recess, and a connecting portion is connected to the anchor portion by the locking portion, The mounting positions of the fixing portion and the anchor portion are offset in the height direction and offset in the lateral direction, one end of the L-shaped connecting portion is fixed to the fixing portion, and the locking portion of the other end is connected to the anchor portion. The locking portion is characterized in that the recess is on the side connected to the anchor portion, the side of the arc-shaped recess that does not want to move the tooth is open, and the recess is locked to the anchor portion from this open side.

2. The orthodontic appliance according to claim 1, characterized in that the connecting portion is provided with a locking portion that restricts movement in the direction in which the tooth is not to be moved, while allowing movement in other directions.

3. The orthodontic appliance according to Claim 1, characterized in that the fixing portion has a surface opposite to the surface that is fixed to the tooth that is formed as a smooth, arc-shaped convex surface.

4. The orthodontic appliance according to claim 1, characterized in that the fixing portion is fixed by bonding it to the tooth to be fixed with an adhesive, and a metal mesh is provided on the surface that is bonded to the tooth to be fixed.

5. The orthodontic appliance according to claim 1, characterized in that the connecting portion is made of a cobalt-chromium wire.

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