KR20100029486A - Orthodontic bracket - Google Patents

Abstract

PURPOSE: A bracket for orthodontics is provided, which makes residue of the surface of the tooth minimized in separation and can be easily separated from the surface of the tooth after use. CONSTITUTION: A bracket for orthodontics comprises a base(100) and a body(200). The base is welded to the surface of the tooth by adhesive and is formed of a junction(110) in which a plurality of protrusions are formed. In the body, an arch wires slot for insertion is formed in the central part. A protrusion is formed in order to have the predetermined height. In the protrusion, a protrusion member is formed.

Description

Orthodontic Brackets {ORTHODONTIC BRACKET}

The present invention relates to an orthodontic bracket, and more particularly, to an orthodontic bracket that can be well separated from the surface of the tooth after use while being firmly bonded to the tooth surface.

In general, a method for orthodontics is widely known using an orthodontic bracket. This method is to fix the orthodontic bracket on the surface of the teeth and then to connect the orthodontic brackets with an arch wire to correct the uneven orthodontic teeth by the force generated by the arch wire.

The conventional structure of the orthodontic bracket includes a base having a joining surface fixed with an adhesive on the surface of the tooth, and an elastic O-ring for fixing the archwire with a slot formed opposite the joining surface of the base to receive the archwire. It consists of a bracket body including a wing on which a fixing member such as a bolt or a bolt is mounted. The orthodontic bracket must be firmly bonded to the surface of the tooth during orthodontics and can be separated from the surface of the tooth after use. do.

Therefore, in order to satisfy the above conditions, there have been attempts to improve the joint strength at the joint surface by applying fine grains to the joint surface of the base, and at the joint surface by forming a plurality of grooves having undercuts formed on the joint surface, Attempts have been made to improve the bond strength of.

Here, the undercut refers to an uneven portion or a concave portion of the product in which the mold does not come out of the product when the mold is operated in the mold opening direction after forming the product.

If an undercut is formed in the orthodontic bracket, the undercut acts as a locking jaw against the adhesive, preventing the orthodontic bracket from being easily separated from the surface of the tooth.

However, these attempts emphasized only the joint strength at the joint surface, and after the orthodontic correction was completed, when the orthodontic bracket was detached from the surface of the tooth, it did not separate well and left much residue on the surface of the tooth. There was a problem of not separating cleanly.

In addition, when the fine grains were applied to the joint surface, the bonding strength between the joint surface containing the fine grains and the surface of the tooth could be improved, but the separation between the joint surface and the fine grains was weak, so the separation was well performed. There was a problem that occurred.

In addition, in the case where a plurality of grooves with undercuts are formed on the joint surface, due to the presence of undercuts, a separate process for forming grooves has to be performed, which makes the manufacturing process complicated, increases the manufacturing cost, and weakens the strength of the processed portion. There was a problem that could be.

When explaining the reason why the separate processing to form a plurality of grooves formed undercut on the joint surface as follows.

In the case of forming a product having an undercut having a certain size, a sliding core is used to allow the mold to be removed from the product when the mold is operated in the mold opening direction after molding the product. In order to produce small products, the sliding core of the mold for producing them must also be manufactured in a very small size.

However, manufacturing a very small sliding core and applying it to a mold is practically impossible, so it is necessary to perform separate processing such as cutting.

The present invention has been proposed in order to solve the above problems, while being firmly bonded to the surface of the tooth can be separated from the surface of the tooth after use and the orthodontic bracket to minimize the residue on the surface of the tooth upon separation It aims to provide.

In addition, the present invention allows the protrusion formed on the protrusion formed on the joint surface in order to obtain the same effect as the undercut is formed on the joint surface, despite the presence of the protrusion when manufacturing the orthodontic bracket by injection molding method The present invention aims to provide an orthodontic bracket that minimizes and optimizes the protruding length of the protrusion so that the mold can be removed from the product after molding.

Orthodontic bracket according to an embodiment of the present invention for achieving the above object is bonded to the surface of the tooth by an adhesive and provided with a base having a joint surface with a plurality of protrusions on one side, the arch on the opposite side In the orthodontic bracket having a body having a wire insertion slot formed in the center portion, wherein the projection is formed to have a predetermined height, the projection is characterized in that the protrusion is formed to surround a portion of the outer surface to form a closed curve .

The protruding portion is preferably formed such that the protruding length from the outer surface of the protuberance is 0.15 to 0.3 μm.

The plurality of protrusions are center projections located at the center of the joining surface, and a plurality of peripheral spaces positioned symmetrically with respect to each other at a predetermined distance from the virtual lines when a virtual line parallel to the slot passes through the center of the central projections. It is preferable that only the central protrusion is located in an area on the joint surface corresponding to the area occupied by the slot.

Some of the plurality of peripheral protrusions are located at the boundary of the joining surface, and the peripheral protrusions located at the boundary of the joining surface is preferably in the shape of a part cut in the vertical direction.

Preferably, stress concentration notches are formed on side surfaces of the body that extend to both ends of the slot.

The slot is formed with a gauge groove into which the gauge for attaching the orthodontic bracket to the teeth is inserted, the gauge groove is formed in the center of the slot so that the center is located where the central axis of the central projection passes. desirable.

The left and right of the slot is preferably formed the wing for fixing the arch wire.

According to the orthodontic bracket as described above, the following effects can be achieved.

When a plurality of protrusions are formed on the joint surface of the base, and the orthodontic bracket is bonded to the surface of the tooth by using an adhesive, the area of application of the adhesive to the base is increased and the orthodontic bracket can be firmly bonded to the surface of the tooth. Will be.

The protrusions provided on the plurality of protrusions act as locking jaws for the adhesive from the bonding surface to the protrusions among the adhesives applied to the base, so that the orthodontic bracket can be firmly bonded to the surface of the tooth.

The outer surface of the plurality of protrusions formed on the joining surface of the base has a protrusion length optimized and minimized, so that the same effect as the undercut is formed on the joining surface, the orthodontic bracket is firmly attached to the surface of the tooth It can be joined.

Stress concentration notches are formed on the sides of the body connected to both ends of the slot, and only the central protrusion is located within the stress concentration range due to the action of the stress concentration notch, so that the orthodontic bracket is separated from the surface of the tooth. Separation at the central protrusion can be made first, and this preferential separation at the central protrusion leads to separation at the peripheral protrusions, and consequently the orthodontic bracket can be well separated from the surface of the tooth.

In the slot, a gauge groove is formed where the center of the central protrusion passes, so that when the orthodontic bracket is separated from the surface of the tooth, the stress is concentrated in the gauge groove so that the separation from the central protrusion occurs first. This preferential separation in the central protrusion leads to separation in the peripheral protrusions, which in turn allows the orthodontic bracket to be well separated from the surface of the tooth.

Peripheral protrusions located at the boundary of the joint surface among the plurality of peripheral protrusions formed on the joint surface of the base have a shape in which the portion is cut in the vertical direction, so that when the orthodontic bracket is separated from the surface of the tooth, The separation from the peripheral protrusions located at the boundary of the outermost junction surface is first made, and the first separation from the peripheral protrusions located at the boundary of the junction surface induces separation from other peripheral protrusions, As a result, the orthodontic bracket can be separated well from the surface of the tooth.

When manufacturing orthodontic brackets by injection molding or the like, in spite of the existence of protrusions, the size of the protrusions is minimized and optimized so that the mold can be separated well after molding, so that a separate additional processing process for forming a conventional undercut is required. By doing so, the manufacturing process is simplified, manufacturing costs are reduced, and the problem of strength weakening due to further processing can be solved.

Hereinafter, with reference to the accompanying drawings the orthodontic bracket according to an embodiment of the present invention will be described in detail.

Referring to Figure 1, the orthodontic bracket according to an embodiment of the present invention is composed of a base 100 and the body 200, a slot 300 is formed in the central portion of the body 200.

The approximate shape of the base 100 is a rectangular shape, and generally has a parallelogram shape.

The base 100 is provided with a bonding surface 110 which is bonded to the tooth surface by an adhesive, and this bonding surface 110 of the base 100 is similar to the surface of each tooth 600 (see FIG. 4). It is made of curved shape.

The bonding surface 110 is formed with a central protrusion 120 positioned at the center of the bonding surface 110 and a plurality of peripheral protrusions 130 positioned around the central protrusion 120. The shape of the central protrusion 120 and the peripheral protrusions 130 may be formed in a column shape having various cross sections, and it is particularly preferable to have a cylindrical shape.

On the other hand, the central protrusion 120 and the peripheral protrusions 130 are preferably formed to have a height of about 0.1 ~ 0.3mm. If the height of the central protrusion 120 and the peripheral protrusion 130 is less than 0.1mm, it is difficult to form the protrusion 140 to be described later, because when the thickness larger than 0.3mm the adhesive layer may be thickened, the adhesive force may be weakened.

The peripheral protrusions 130 are spaced apart from each other by a predetermined distance from the virtual line C1 when the virtual line C1 passes through the center of the central protrusion 120 and is parallel to the slot 300. The first protrusion group 130a, the second protrusion group 130b, and the third protrusion group 130c may be divided in a close order from the virtual line C1. Here, the number of the protruding groups is not limited and may vary depending on the case. That is, there may be more protrusion groups or no protrusion groups at all between the first and third protrusion groups 130a and 130c, and any of the protrusion groups 130a, 130b, and 130c may exist. There can only be one.

Some of the peripheral protrusions 130 are located at the boundary of the joint surface 110. In the above embodiment, the peripheral protrusion 130 is divided into three protrusion groups according to the distance from the virtual line C1. The third protrusion group 130c farthest from the distance C1 corresponds to this.

Meanwhile, the third protrusion group 130c positioned at the boundary of the bonding surface 110 is located at the outermost side of the bonding surface 110 among the peripheral protrusions 130, and a part thereof is cut in the vertical direction. It is made in a shape.

Meanwhile, referring to FIGS. 3 and 4, the central protrusion 120 and the peripheral protrusions 130 are formed with protrusions 140 forming a closed curve covering a part of the outer surface thereof. Preferably, the length D protruding from the outer surfaces of the protrusions 120 and 130 is 0.15 to 0.3 μm. This is because when the protruding length D of the protrusion 140 is smaller than 0.15 μm, the bonding force to the adhesive becomes smaller, and when the protrusion length D is larger than 0.3 μm, it is difficult to remove the mold due to the protrusion 140.

On the other hand, the protrusion 140 is preferably formed at a point bisecting the height of the protrusions (120, 130), when the central protrusion 120 and the peripheral protrusion 130 is formed in a cylindrical shape of the protrusion 140 ) Is made into an annular ring shape.

1 and 2, the body 200 is continuously formed on the opposite side of the bonding surface 110 of the base 100, and the body 200 is provided with a slot 300, and the slot ( The wing 400 may be formed on the left and right sides of the 300.

 The slot 300 is formed to have a width and a depth to which the arch wire (not shown) can be fitted, and at a predetermined angle A on the side of the body 200 that connects to both ends of the slot 300. An embedded stress concentration notch 210 is formed, and the embedded angle A of the stress concentration notch 210 is preferably a 90 degree angle.

In addition, the bottom surface 310 of the slot 300 is formed with a gauge groove 311 is inserted into the gauge (not shown) for attaching the orthodontic bracket to the teeth, the gauge groove 311 is the center It is formed in the center of the bottom surface 310 of the slot 300 so that the central axis (C2) of the central projection 120 passes.

The wing 400 is one or two on the left and right sides of the slot 300 so that a fixing member (not shown) such as an elastic O-ring or bolt for fixing the arch wire to be inserted into the slot 300 is mounted. It may be formed, and in some cases may not be formed.

In addition, the surface of the wing 400 is provided with a dimple portion 410 to indicate the position of use so that the operator can recognize which tooth is used for the orthodontic bracket. The dimple 410 may be concave on the surface of the wing 400, and may be formed in various shapes such as a triangle, a circle, and a rectangle.

Hereinafter will be described in detail the operation of the orthodontic bracket according to an embodiment of the present invention having the above configuration.

Referring to Figure 3, the orthodontic bracket is fixed to the surface of the tooth 600 via the adhesive 500 selected by the operator or bracket maker. When the adhesive 500 is applied to the base 100, the adhesive 500 is filled with the bonding surface 110 between the central protrusion 120 and the peripheral protrusions 130, and the upper and peripheral portions of the central protrusion 120. It is applied at a height high enough to cover the tip of the protrusion 130.

At this time, the surface of the adhesive 500 filled in the bonding surface 110 and the surface of the adhesive 500 applied to the tip of the central protrusion 120 and the peripheral protrusions 130 achieve the same level. After the adhesive 500 is applied to the base 100, the orthodontic bracket is fixed to the surface of the tooth, and the orthodontic operation is performed in a conventional manner.

Here, the dimple 410 formed in the wing 400 allows the operator to accurately recognize the position of use of the orthodontic bracket to prevent the inappropriate orthodontic bracket from being used for other teeth. When the orthodontic bracket is fixed to the surface of the tooth as described above, the tip of the adhesive 500 and the central protrusion 120 and the peripheral protrusions 130 filled in the space between the central protrusion 120 and the peripheral protrusions 130. The adhesive 500 applied to cover the adhesive is adhered to the surface of the tooth 600 in an integrated state.

In this case, since a plurality of protrusions 120 and 130 are formed on the bonding surface 110 of the base 100, the application area of the adhesive 500 to the base 100 is increased, thereby making it possible to achieve a firm bonding. .

In addition, as shown in FIG. 4, the protrusions 140 provided on the plurality of protrusions 120 and 130 formed on the bonding surface 110 of the base 100 may have the bonding surface 110 and the teeth of the base 100. The orthodontic bracket is a surface of the tooth 600 by acting as a locking jaw against the adhesive 510 filled from the joint surface 110 to the protrusion 140 among the adhesive 500 hardened and integrated between the surfaces of the 600. To allow for a secure bond.

By the action of the protrusion 140, the same effect as the undercut is formed on the joint surface 110, and the orthodontic bracket by injection molding, etc. due to the optimization and minimization of the protrusion length of the protrusion 140. In the case of manufacturing the mold, the mold can be separated well after the molding despite the existence of the protrusion 140, so that a separate additional processing step for forming the undercut, which is conventionally performed, is not required, thereby simplifying the manufacturing process and manufacturing cost. Is reduced, and the problem of strength weakening due to further processing can be solved.

On the other hand, referring to Figures 1 to 4, when orthodontic correction is completed or if necessary to apply a force to the orthodontic bracket using a separation tool (not shown) to remove the orthodontic bracket from the surface of the teeth as needed. Since a stress concentration notch 210 is formed at a side surface of the body 200 that extends to both ends of the slot 300 of the orthodontic bracket, that is, a predetermined area between the stress concentration notches 210, that is, the slot 300. Stress is concentrated in the region 111 on the joint surface 110 corresponding to this occupied region.

Only the central protrusion 120 is located in the region 111 where stress is concentrated due to the action of the stress concentration notch 210, and when the orthodontic bracket is separated from the surface of the tooth, separation from the central protrusion 120 occurs. The first separation in the central protrusion 120 induces the separation in the peripheral protrusions 130 (starting the separation in the central protrusion 120, the radial separation is spread and propagated around the peripheral protrusions). 130 are separated). Thus, the orthodontic bracket can be separated well from the surface of the tooth 600.

On the other hand, in the center of the bottom surface 310 of the slot 300 formed on the opposite side of the bonding surface 110 of the base 100, the gauge groove 311 is located in the center where the central axis (C2) of the central protrusion 120 passes By forming the orthodontic bracket, when the orthodontic bracket is separated from the surface of the tooth 600, stress is concentrated in the gauge groove 311 to help the separation in the central protrusion 120 to be made first.

Meanwhile, among the plurality of peripheral protrusions 130 formed on the bonding surface 110 of the base 100, the peripheral protrusions (the peripheral protrusions 130) positioned at the boundary of the bonding surface 110 are spaced apart from the virtual line C1. In the above embodiment divided into three protrusion groups according to the distance, the protrusions belonging to the third protrusion group 130c are formed in a shape in which a portion thereof is cut in the vertical direction, so that the orthodontic bracket is removed from the surface of the tooth 600. When the separation is separated from the peripheral protrusions (projections belonging to the third protrusion group 130c) located at the boundary of the upper joining surface 110 located at the outermost side of the peripheral protrusions 130.

Priority separation of the protrusions belonging to the third protrusion group 130c may facilitate separation of the protrusions belonging to the second protrusion group 130b and the first protrusion group 130a among the peripheral protrusions 130. do. Thus, the orthodontic bracket can be separated well from the surface of the tooth.

The above-described action of the stress concentration notch 210 and the gauge groove 311 may act to induce the fracture of the orthodontic bracket in addition to the above-described action.

That is, since the orthodontic bracket is mainly made of a ceramic material, breakage is likely to occur when the orthodontic bracket is separated from the surface of the tooth 600. In the case of such breakage, the stress concentration notch 210 and the gauge groove ( 311) acts to induce breakage along a specific portion by the notch effect, resulting in a clean separation with less residue left on the surface of the tooth 600.

While specific embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that the present invention may be made without departing from the spirit and scope of the invention as set forth in the claims below. It is to be understood that various modifications and changes can be made.

1 is a perspective view for showing the base of the orthodontic bracket according to an embodiment of the present invention.

Figure 2 is a perspective view for showing the body of the orthodontic bracket according to an embodiment of the present invention.

Figure 3 is a view showing a state in which the orthodontic bracket according to the embodiment of the present invention bonded to the surface of the tooth.

4 is an enlarged view of region “I” of FIG. 3;

<Explanation of symbols for the main parts of the drawings>

100: base 110: joint surface

120: center projection 130: peripheral projection

130a: first protrusion group 130b: second protrusion group

130c: third protrusion group 200: body

210: stress concentration notch 300: slot

311: gauge groove 400: wing

500: adhesive 600: tooth

C1: virtual line C2: central axis

Claims (12)

In the orthodontic bracket having a base bonded to the surface of the tooth by an adhesive and having a joint surface with a plurality of protrusions formed on one side, the opposite side is provided with a body formed in the center of the slot for inserting the arch wire, The protrusion is formed to have a predetermined height, and the orthodontic bracket, characterized in that the protrusion is formed to surround a portion of the outer surface forming a closed curve. The method of claim 1, The protruding portion orthodontic bracket, characterized in that the protruding length from the outer surface of the protrusion is 0.15 ~ 0.3㎛. The method according to claim 1 or 2, The plurality of protrusions are center projections located at the center of the joining surface, and a plurality of peripheral spaces positioned symmetrically with respect to each other at a predetermined distance from the virtual lines when a virtual line parallel to the slot passes through the center of the central projections. And orthodontic brackets, wherein only the central protrusion is located in an area on the joint surface corresponding to the area occupied by the slot. The method of claim 3, wherein Some of the plurality of peripheral protrusions are located at the boundary of the bonding surface, the peripheral protrusion located at the boundary of the bonding surface is a portion orthodontic bracket characterized in that the portion is cut in the vertical direction. The method according to claim 1 or 2, Orthodontic brackets, characterized in that the stress concentration notches are formed on the side of the body connected to both ends of the slot, respectively. The method of claim 3, wherein The slot is provided with a gauge groove into which the gauge for attaching the orthodontic bracket to the tooth is inserted, the gauge groove is formed in the center of the slot so that the center is located where the central axis of the central projection passes. Orthodontic brackets. The method of claim 1, Orthodontic brackets, characterized in that the left and right of the slot is formed a wing for fixing the arch wire. In the orthodontic bracket having a base bonded to the surface of the tooth by an adhesive and having a joint surface with a plurality of protrusions formed on one side, the opposite side is provided with a body formed in the center of the slot for inserting the arch wire, The plurality of protrusions are center projections located at the center of the joining surface, and a plurality of peripheral spaces positioned symmetrically with respect to each other at a predetermined distance from the virtual lines when a virtual line parallel to the slot passes through the center of the central projections. And orthodontic brackets, wherein only the central protrusion is located in an area on the joint surface corresponding to the area occupied by the slot. The method of claim 8, Some of the plurality of peripheral protrusions are located at the boundary of the bonding surface, the peripheral protrusion located at the boundary of the bonding surface is a portion orthodontic bracket characterized in that the portion is cut in the vertical direction. The method according to claim 8 or 9, Orthodontic brackets, characterized in that the stress concentration notches are formed on the side of the body connected to both ends of the slot, respectively. The method of claim 8, The slot is provided with a gauge groove into which the gauge for attaching the orthodontic bracket to the tooth is inserted, the gauge groove is formed in the center of the slot so that the center is located where the central axis of the central projection passes. Orthodontic brackets. The method of claim 8, Orthodontic brackets, characterized in that the left and right of the slot is formed a wing for fixing the arch wire.

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