Orthodontic instrument

Abstract

To efficiently move a desired tooth.SOLUTION: An orthodontic instrument 100 includes: an arch wire 1 having a loop unit 11 and arranged in an oral cavity by using a bracket 4; an anchor 2 arranged in an alveolar part located deeper than the loop unit 11; and a pulling member 3 for connecting the loop unit 11 and the anchor 2 and pulling the loop unit 11 to the anchor 2 side.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to orthodontic appliances. [Background technology]

[0002] There are known methods for correcting the alignment of teeth and the protrusion of upper and lower jaws due to tooth protrusion and / or alveolar bone protrusion. For example, an orthodontic method is known in which an orthodontic bracket is attached to the crown, which is the surface of each tooth, and mechanical tension (restoring force such as pushing, pulling, twisting, etc.) of an arch wire attached to each orthodontic bracket of an adjacent tooth is applied to each tooth, gradually moving the position of each tooth to the proper alignment state. Orthodontic forces are applied to the target teeth via the orthodontic bracket. It is clinically known that such movement of the target teeth involves loop mechanics.

[0003] Also, an invention for an orthodontic appliance is known. For example, an orthodontic archwire is known that includes a substantially cylindrical wound part in which a wire is wound three or four times, a loop part having a first pull-out part pulled out in one direction that is tangential to the wound part, and a second pull-out part pulled out in another direction that is tangential to the wound part and opposite to the first pull-out part, and a main wire part connected coaxially with the axis of the first pull-out part and the axis of the second pull-out part. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6305666 [Patent Document 2] Patent No. 6082727 Summary of the Invention [Problem to be solved by the invention]

[0005] In the case of loop mechanics, when one tooth (mainly the back tooth) is used as a base to pull the other tooth (mainly the front tooth) toward the back and move it, the back tooth may also be affected and move forward. For example, when orthodontic treatment for maxillary protrusion is performed, if the back tooth is affected and moves forward, the gap will be filled, but the movement of the front tooth may be insufficient, resulting in little effect. In one aspect, the present invention aims to move desired teeth simply and efficiently. [Means for solving the problem]

[0006] In order to achieve the above object, an orthodontic appliance is disclosed, which includes an archwire having a loop portion and being placed in the oral cavity using brackets, an anchor placed in the alveolar portion behind the loop portion, and a tension member connecting the loop portion and the anchor and pulling the loop portion toward the anchor. Effect of the Invention

[0007] In one embodiment, the desired teeth can be moved simply and efficiently. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating an orthodontic appliance according to an embodiment. [Diagram 2] 1A to 1C are diagrams illustrating an example of an effect of the orthodontic appliance according to the embodiment. [Diagram 3] FIG. 1 is a diagram illustrating the bowing effect. [Figure 4] 1A to 1C are diagrams illustrating an example of an effect of the orthodontic appliance according to the embodiment. [Diagram 5] FIG. 13 is a diagram illustrating a modified example of an orthodontic appliance. [Figure 6] FIG. 13 is a diagram illustrating an example of the result of wearing the orthodontic appliance of the modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an orthodontic appliance according to an embodiment will be described in detail with reference to the drawings.

[0010] In order to facilitate understanding of the invention, the position, size, shape, range, etc. of each component shown in the following drawings may not represent the actual position, size, shape, range, etc. Therefore, the present invention is not necessarily limited to the position, size, shape, range, etc. disclosed in the drawings, etc. In the embodiments, elements expressed in the singular form include the plural form unless otherwise clearly indicated in the context. <Embodiment> Fig. 1 is a diagram showing an orthodontic appliance according to an embodiment, in which the right side of the paper surface is referred to as the front side, and the left side of the paper surface is referred to as the rear side. The orthodontic appliance 100 of the embodiment includes an archwire 1 , an anchor 2 , and a tension member 3 .

[0011] The orthodontic appliance 100 of this embodiment has the function of correcting maxillary protrusion, etc., by attaching it to the dentition after extracting a tooth (not shown) that existed between teeth 20 and 21, and moving tooth 21 into the gap S.

[0012] The arch wire 1 has a loop portion 11 and is placed in the oral cavity using brackets 4. The brackets 4 are attached to the surfaces of the teeth (for example, teeth 20, 21), respectively.

[0013] An example of the material for the arch wire 1 is metal. An example of the material for the brackets 4 is stainless steel, ceramics, resin such as polycarbonate, and the like.

[0014] The loop portion 11 of the present embodiment has a single ring 11a. By providing the ring 11a, the ring 11a acts like a torsion coil spring, and a force acts in the winding direction (bending inward).

[0015] By providing the ring 11a, the length of the arch wire 1 between the teeth 20 and 21 is increased. This is preferable because it increases the resilience and the force that moves the teeth 21 toward the rear side. The ring 11a may be double or more, but a single ring is preferable. The ring 11a does not have to be provided. The loop portion 11 has a hook 11b provided on the rear tooth side. The anchor 2 is placed in the alveolar region behind the loop portion 11. The anchor may be made of a material and placed by a method known in the art.

[0016] The tension member 3 connects the hook 11b and the anchor 2, and pulls the loop portion 11 toward the anchor 2. The material of the tension member 3 is not particularly limited, but examples thereof include metal and resin.

[0017] A typical closed wire (a wire that closes a gap) requires a hook to be attached in order to pull the wire. This requires laboratory work such as soldering a hook to the wire or bending the back (especially when you want to move only the front teeth, you need to solder the hook to the wire or join it in some way). In contrast, in this embodiment, the tension member 3 is placed on the hook 11b, so that the movement of the tension member 3 within the loop portion 11 is restricted, and stable traction by the tension member 3 can be achieved without laboratory work. FIG. 2 is a view for explaining an example of the result when the orthodontic appliance according to the embodiment is worn. When the orthodontic appliance 100 is worn, a force acts to bring the teeth in front of the loop portion 11 and the teeth in the rear thereof closer together.

[0018] By continuing to wear the orthodontic appliance 100, the gap S between the teeth 20 and 21 can be narrowed compared to Fig. 1. In addition, the anchor 2 and the tension member 3 restrict the forward movement of the tooth 20, and only the teeth in front of the loop portion 11 (e.g., teeth 22, 23) move backward as a whole, thereby improving maxillary protrusion, etc.

[0019] As described above, the orthodontic appliance 100 of the embodiment includes the arch wire 1 having the loop portion 11 and placed in the oral cavity using the brackets 4, the anchor 2 placed on the gums (alveolar portion) behind the loop portion 11, and the tension member 3 connecting the loop portion 11 and the anchor 2 and pulling the loop portion 11 toward the anchor 2. Therefore, a desired tooth (e.g., teeth 21, 22, 23) can be moved easily and efficiently to the rear side without moving the tooth 20 behind the loop portion 11.

[0020] For example, as compared with a method in which an arch wire is fixed to the front and rear teeth as shown in FIG. 1(a) of Japanese Patent No. 6305666, the desired teeth (eg, teeth 21, 22, 23) can be moved to the rear side more easily and efficiently. FIG. 3 is a diagram illustrating the bowing effect. In addition, FIG. 3 shows the tooth row diagrammatically.

[0021] When an arch wire is fixed to the front and back teeth (conventional technology), a bowing effect may occur, as shown in Figure 3 (when the front teeth are moved backwards, the wire is unable to withstand the traction force, causing the front teeth to bend and sag downward, resulting in a deeper anterior bite and insufficient bite of the back teeth). FIG. 4 is a diagram illustrating an example of the effect of the orthodontic appliance according to the embodiment. In addition, FIG. 4 shows the tooth row diagrammatically.

[0022] According to the orthodontic appliance 100 of this embodiment, by arranging the tensioning member 3 on the hook 11b, a moment M acts to rotate the teeth (e.g., teeth 22, 23) in front of the loop portion 11 clockwise in Figure 3, so that even when pulled by the tensioning member 3, the deflection of the teeth 22, 23 can be suppressed, thereby suppressing the bowing effect.

[0023] Further, the loop portion 11 is provided with a hook 11b for restricting the movement of the pulling member 3 within the loop portion 11. This allows stable pulling by the pulling member 3 to be achieved. <Modification>

[0024] In this embodiment, the orthodontic appliance 100 is placed on the outside of the teeth. However, the present invention is not limited to this and can also be applied to lingual orthodontics (a structure in which a multi-bracket device is attached to the lingual side (the back side of the teeth)). FIG. 5 is a diagram illustrating an orthodontic appliance according to a modified example. In addition, Fig. 5 shows the dentition diagrammatically from the occlusal surface. In Fig. 5, the upper side of the paper is the front teeth side, and the lower side of the paper is the back teeth side. The orthodontic appliance 100a shown in FIG. 5 is applied to lingual orthodontics.

[0025] The orthodontic appliance 100a has an archwire 31, an anchor 32, and a tension member 33. The structures and materials of the archwire 31, anchor 32, and tension member 33 can be the same as those of the archwire 1, anchor 2, and tension member 3, respectively. For example, the archwire 31 has a loop portion 311 having the same structure and material as the loop portion 11. The anchor 32 is placed, for example, in the alveolar region on the back side of the tooth. FIG. 6 is a diagram illustrating an example of the result when the modified orthodontic appliance is worn.

[0026] By continuing to wear the orthodontic appliance 100a of the modified example, the gap S between the teeth 40 and 41 can be narrowed compared to that in Fig. 5. Also, the teeth in front of the loop portion 311 (e.g., teeth 41 to 44) move generally rearward, thereby improving protrusion.

[0027] Although the orthodontic appliance of the present invention has been described above based on the illustrated embodiment, the present invention is not limited thereto, and the configuration of each part can be replaced with any configuration having a similar function. In addition, any other configuration or process may be added to the present invention. Furthermore, the present invention may be a combination of any two or more configurations (features) of the respective embodiments described above. [Explanation of symbols]

[0028] 100, 100a Orthodontic appliances 1 Archwire 11 Loop section 11a ring 11b Hook 2. Anchor 3 Tensile members 4 Bracket 20~23 teeth

Claims

1. an arch wire having a loop portion and being placed in the oral cavity using brackets; An anchor disposed in an alveolar portion on a back side of the loop portion; a tension member that connects the loop portion and the anchor and pulls the loop portion toward the anchor; An orthodontic appliance comprising:

2. 2. The orthodontic appliance of claim 1, wherein the loop portion includes a hook for restricting movement of the tension member within the loop portion.

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