JP2014144200A - Orthodontic member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an orthodontic member that is optimum for a photopolymerizable adhesive.SOLUTION: An orthodontic member (1) comprises a tabular base portion (2) a bottom face (2a) of which is bonded to a tooth surface (T), and a main body (3) which is fixed on an upper face of the base portion (2). The base portion (2) has a metal layer (21) with an upper face of which the main body (3) is fixed, and the outer peripheral edge (24) of the metal layer (21) does not protrude as far as the bottom face (2a) of the base portion (2).

Description

  The present invention relates to an orthodontic member.

  The thing of patent document 1 is known as an orthodontic member. The orthodontic member described in Patent Document 1 is adhered to the tooth surface using an adhesive that chemically polymerizes. In such an orthodontic member, the chemically polymerizing adhesive sucks saliva in the mouth of the patient, and the adhesive force may be reduced. Therefore, Patent Document 2 proposes to form a protrusion on the outer peripheral portion of the back surface of the base plate of the orthodontic member to protect the adhesive from saliva.

Japanese Patent No. 2532870 U.S. Pat. No. 4,544,353

  In recent years, photopolymerization adhesives have been used. As described above, the photopolymerization adhesive is difficult to irradiate light to the back when there is a protrusion.

  Accordingly, an object of the present invention is to provide an orthodontic member that is optimal for a photopolymerization adhesive.

The orthodontic member of the present invention capable of solving the above problems is
A plate-like base portion whose bottom surface is bonded to the tooth surface;
A main body fixed to the upper surface of the base portion,
The base portion has a metal layer to which the main body is fixed on an upper surface thereof,
The outer peripheral edge of the metal layer does not protrude to the bottom surface of the base portion.

In the orthodontic member of the present invention,
The outer peripheral edge of the metal layer may not protrude to the tooth side surface of the metal layer.

In the orthodontic member of the present invention,
The base portion is provided on the tooth surface side of the metal layer, and includes at least one adhesive holding layer capable of holding an adhesive,
The outer peripheral edge of the metal layer may not protrude to the tooth side surface of the adhesive holding layer adjacent to the metal layer.

In the orthodontic member of the present invention,
The outer peripheral edge of the metal layer may not protrude to an intermediate position in the thickness direction of the adhesive holding layer adjacent to the metal layer.

In the orthodontic member of the present invention,
The outer peripheral edge of the metal layer may not protrude to the tooth side surface of the metal layer.

In the orthodontic member of the present invention,
The metal layer is formed by punching a metal plate,
The outer peripheral edge of the metal layer may be formed to extend toward the tooth surface by the punching process.

In the orthodontic member of the present invention,
The outer peripheral edge of the metal layer may have a protruding length toward the tooth surface side by performing a half punching process before the punching is performed on the metal plate.

In the orthodontic member of the present invention,
An adhesive may be applied to the bottom surface of the base portion.

In the orthodontic member of the present invention,
The adhesive holding layer may be a metal mesh knitted with metal wires, a porous body made of a metal plate provided with a large number of holes, or a mechanical lock provided with a plurality of protrusions protruding toward the tooth surface side. It may contain at least one of the bodies.

In the orthodontic member of the present invention,
A plurality of convex portions projecting toward the tooth surface side may be provided on the tooth surface side surface of the metal layer.

  ADVANTAGE OF THE INVENTION According to this invention, the member for orthodontics optimal when using a photopolymerization adhesive agent is provided.

It is a perspective view of the orthodontic member which concerns on embodiment of this invention. (A) is the elements on larger scale of the orthodontic member adhere | attached on the tooth surface, (b) is the bottom view. It is a figure which shows the manufacturing process of a base part. It is a figure which shows the manufacturing process of a base part. It is a graph which shows the relationship between light irradiation time and adhesive strength. It is the elements on larger scale of the orthodontic member provided with the some mesh layer. (A) is the elements on larger scale of the orthodontic member provided with the porous body, (b) is the bottom view. (A) is the elements on larger scale of the orthodontic member provided with the mechanical lock body, (b) is the bottom view. It is the elements on larger scale of the orthodontic member which formed the base part only with the metal layer.

  Hereinafter, an orthodontic member 1 according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an orthodontic member 1.

<Overall structure>
FIG. 1 is a perspective view showing an orthodontic member 1.
As shown in FIG. 1, the orthodontic member 1 is fixed to a plate-like base portion 2 whose bottom surface 2 a can be bonded to a tooth surface T (see FIG. 2A) and the upper surface of the base portion 2. Bracket body 3.

  At the time of orthodontic correction, this orthodontic member 1 is attached to each of a plurality of teeth, an arch wire is passed over each of the orthodontic members 1, and the orthodontic force is applied to the teeth in the direction of normal dentition. Giving and correcting the dentition.

  The present invention relates to a base portion of the orthodontic member. The present invention is not limited to the orthodontic bracket but can be applied to any type of orthodontic bracket, orthodontic buccal tube, lingual retainer, lingual button, lingual attachment, and the like. In the following description, the present invention will be described in detail using the orthodontic member 1 shown in FIG.

<Base part>
2A is an enlarged side cross-sectional view of the lower portion of the orthodontic member 1 shown in a state of being bonded to the tooth surface T, and FIG. 2B is a bottom view thereof. As shown to (a) of FIG. 2, the base part 2 is a substantially plate-shaped member along the curved surface of a tooth surface. An adhesive is applied to the tooth side surface of the base portion 2.

  In the example shown in FIG. 2A, the base portion 2 includes a solid metal layer 21 and a mesh layer as an adhesive holding layer fixed to the tooth surface T side surface of the metal layer 21. 22. The adhesive retaining layer is a layer that retains an adhesive that adheres the orthodontic member 1 to the tooth surface T.

  An adhesive is included in the mesh gap of the mesh layer 22. There are two types of adhesive application: retrofitting at the chair side and pre-coating at the factory. As in the latter case, by applying an adhesive to the tooth surface T side of the base portion 2 in advance, the orthodontic member 1 can be mounted on the patient's teeth more quickly.

  The metal layer 21 can be formed from a stainless steel thin plate, for example. The mesh layer 22 is composed of a metal mesh in which metal wires are knitted. A twill or plain weave can be used for the metal mesh. For example, an 80 mesh metal mesh having 80 wires in a width of 1 inch can be employed. The metal layer 21 and the mesh layer 22 are fixed to each other by diffusion bonding, welding, or the like.

  As shown in FIG. 2B, the outer peripheral edge 24 of the metal layer 21 of the base portion 2 protrudes toward the tooth surface T over the entire circumference. The outer peripheral edge portion 24 does not protrude to the bottom surface 2a of the base portion 2 as shown in FIG. More specifically, the outer peripheral edge portion 24 does not protrude to the tooth surface T side surface 22a of the mesh layer 22 as an adhesive holding layer adjacent to the metal layer 21, and further in the middle in the thickness direction of the mesh layer 22. Even the position 22b does not protrude.

<Mounting method on teeth>
The orthodontic member configured as described above brings the bottom surface 2a of the base portion 2 to which the adhesive is applied into contact with the tooth surface T of the patient. In this state, using a light irradiator capable of irradiating light of a specific wavelength, visible light is irradiated from the side of the orthodontic member toward the mesh layer 22 containing the adhesive. For example, when (Reliance Orthodontic Products Light Bond) is used as an adhesive, light having a wavelength of 450 nm is irradiated. Then, the adhesive contained in the mesh layer 22 is cured by this light. As a result, the bottom surface 2a of the base portion 2 is fixed to the tooth surface T.

  At this time, according to the orthodontic member 1 according to the present embodiment, the outer peripheral edge 24 of the metal layer 21 does not protrude to the tooth surface T side up to the bottom surface 2 a of the base 2. That is, a large gap is secured between the tooth surface T and the metal layer 21, and most of the side surfaces of the mesh layer 22 are exposed from this gap. For this reason, it is easy to make the visible light irradiated from the light irradiator reach the back area of the mesh layer 22 (the center area in FIG. 2B).

  In addition, with respect to the direction perpendicular to the tooth surface T, light can be irradiated to a region close to the metal layer 21 among the adhesive included in the outer peripheral region of the mesh layer 22. For this reason, the adhesive agent in the vicinity of the outer peripheral edge of the metal layer 21 can be reliably cured, and the metal layer 21 can be firmly bonded to the tooth surface T.

<Manufacturing method of base part>
Next, the manufacturing method of the base part 2 is demonstrated using FIG. 3 and FIG. 3 and 4 are diagrams showing a manufacturing process of the base portion 2.

  First, as shown in FIG. 3A, an intermediate 2 </ b> A in which a plate-shaped metal plate 21 </ b> A that becomes the metal layer 21 is overlapped with a plate-like mesh material 22 </ b> A that becomes the mesh layer 22, and both are integrated. Is made.

  Next, as shown in FIG. 3B, the intermediate body 2A is set on the processing machine 10 so as to be sandwiched from above and below. The processing machine 10 includes a lower punch 11 that can be moved in the vertical direction, an upper punch 12 that moves in the vertical direction according to the movement of the lower punch 11, an upper die 14 that suppresses portions other than the portion to be cut out, and a portion other than the portion to be cut out. And a lower die 13 held down from below. The lower punch 11 has a shape corresponding to the shape of the base portion 2. In the following description, the process of manufacturing the base portion 2 with the metal layer 21A positioned on the lower side will be described. However, the base portion 2 may be manufactured with the metal layer 21A positioned on the upper side.

  The intermediate body 2 </ b> A is set on the processing machine 10 with the metal plate 21 </ b> A facing the lower punch 11. Then, the lower punch 11 is pushed upward, and the half punched body 2B having a shape corresponding to the base portion 2 is half punched from the intermediate body 2A.

  Here, half punching means that the lower punch 11 is cut into the metal plate 21A by about half the thickness of the metal plate 21A adjacent to the lower punch 11 as shown in FIG. In the state shown in FIG. 3B, the half-blanked body 2B is not completely separated from the intermediate body 2A. In this state, the half punched body 2B has a flat plate shape.

  Next, as shown in FIG. 3C, the flat pressing die 15 is set above the intermediate body 2A. The flat pressing die 15 is larger than the portion where the pressing surface is punched out. For this reason, the flat pressing die 15 can press the intermediate body 2 </ b> A with the same flat pressing surface by combining the punched portion and the outer region. The flat punch 15 is lowered, and the half punched body 2B is pushed into the intermediate body 2A so that the upper surface of the half punched body 2B is flush with the upper surface of the intermediate body 2A.

  Next, as shown in FIG. 4, the punching die 16 is set above the intermediate body 2A. The punching die 16 has a shape corresponding to the shape of the contact surface punched out. Further, the shape of the contact surface is a shape corresponding to the tooth surface shape of the patient wearing the orthodontic member 1. The punching die 16 is lowered to punch the half punched body 2B from the intermediate body 2A. The half punched body 2 </ b> B punched out in this way becomes the base portion 2.

  According to the process as described above, in the process shown in FIG. 3C and FIG. 4, the outer peripheral edge portion of the metal plate 21A of the half punched body 2B (the portion that becomes the outer peripheral edge portion 24 of the base portion 2) Plastic deformation so as to protrude toward the mesh material 22A side. However, since the stroke of the lower punch 11 when cutting the half punched body 2B from the metal plate 21A is small, the deformation amount of the outer peripheral edge 24 of the metal layer 21 is small.

  In the above-described process, the protrusion amount of the protrusion formed on the outer peripheral edge portion 24 of the metal layer 21 is suppressed by appropriately adjusting the stroke amount, stroke speed, load size, and the like of the lower punch 11 and the punching die 16. be able to. By adjusting these values, the base portion 2 is arranged such that the tips of the protrusions formed on the outer peripheral edge portion 24 of the metal layer 21 are located on the inner side in the thickness direction of the surface of the metal layer 21 on the tooth surface T side. Can also be formed.

  Unlike the present embodiment, when the base part is produced by directly punching the intermediate body with a punching die without going through the above-described half punching process and flat pressing process, plastic deformation of the outer peripheral edge part of the metal layer is caused. Large and protrudes to cover the mesh layer. In such a case, when the orthodontic member is attached to the tooth, the light does not easily reach the back of the base portion, and the adhesive strength is weakened.

  The bracket body 3 is fixed to the upper surface of the base portion 2 obtained in this way, and an adhesive is applied to the mesh layer 22 so that the adhesive is included in the mesh gap. In this way, the orthodontic member 1 can be obtained.

<Example>
The light irradiation time and the adhesive strength when the orthodontic member according to the above-described embodiment was bonded to the tooth surface using a photopolymerization adhesive were examined (Example). Ten samples were prepared with light irradiation times of 3 seconds, 6 seconds, 9 seconds, 12 seconds, and 15 + 15 seconds, respectively, and the average of the adhesive strength was determined. The result is shown in FIG. In addition, 15 + 15 seconds means that the orthodontic member was irradiated with light for 15 seconds from one direction and then irradiated with light for 15 seconds from a different direction. Samples with light irradiation times of 3 seconds, 6 seconds, 9 seconds, and 12 seconds irradiated the orthodontic member from one direction.

  Further, unlike the present embodiment, the orthodontic member according to the reference example obtained by directly punching the intermediate body with a punching die without producing the half punching process or the flat pressing process described above, and producing the base part. In the same manner, the light irradiation time and the adhesive strength were examined (reference example). The measurement results are shown in FIG. A solid line in the figure indicates an example, and a broken line indicates a reference example.

  As shown in FIG. 5, the orthodontic member of the example shows high adhesive strength even if the light irradiation time is short. On the other hand, the orthodontic member of the reference example has low adhesive strength when the light irradiation time is short. In particular, an uncured portion of the adhesive was found in the central portion of the base portion. Thus, when the orthodontic member of the embodiment is used, good adhesive strength can be obtained even if the irradiation time of the light irradiator is short.

  Thereby, if the orthodontic member which concerns on this embodiment is used, the orthodontic member can be stably attached to a patient's tooth in a short time, and a patient's burden is eased. In addition, even if the surgeon uses an inappropriate light irradiator and the amount of light tends to be insufficient, the orthodontic member can be reliably attached to the tooth. Furthermore, when attaching an orthodontic member to a patient's molar teeth, it is difficult to put a light irradiator, and the adhesive strength tends to decrease. However, if the orthodontic member according to this embodiment is used, more light is irradiated. Since it is easy, it is easy to stably attach the orthodontic member to the tooth surface of the molar.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

<Various modifications>
For example, in the above-described embodiment, the outer peripheral edge portion 24 that protrudes downward from the lower surface of the metal layer 21 has been described with an example in which it is formed over the entire outer periphery of the surface on the tooth surface T side of the metal layer 21. The present invention is not limited to this example. You may comprise so that protrusion may be formed as an outer periphery only in at least one part of the outer periphery of the lower surface of the metal layer 21. FIG.

  Moreover, although the orthodontic member of this embodiment is suitable when it fixes to a tooth surface using a photopolymerization adhesive agent, you may fix to a tooth surface with a chemical polymerization adhesive agent. In this case, it is preferable to use a chemical polymerization adhesive whose adhesive strength is not weakened by saliva.

<Multilayer mesh layer>
Moreover, although the base part 2 gave and demonstrated the example provided with the single mesh layer as an adhesive agent holding layer in the above-mentioned embodiment, this invention is not limited to this example. For example, as shown in FIG. 6, it is good also as a structure provided with the some mesh layers 22 and 23 as an adhesive agent retention layer. In this case, it is preferable to laminate a plurality of metal meshes so that the meshes become coarser from the bracket body 3 side toward the tooth surface T side.

<Adhesive holding layer other than metal mesh>
(Porous body)
In the above description, an example in which a metal mesh is used as the adhesive holding layer has been described. However, a material other than the metal mesh may be used as the adhesive holding layer. For example, in the orthodontic member 1A shown in FIGS. 7A and 7B, the adhesive holding layer is formed of a porous body 120 made of a metal plate provided with a large number of holes 121. .

  FIG. 7A is a side sectional view of the orthodontic member 1 </ b> A of this example, and FIG. 7B is a bottom view of the porous body 120. The porous body 120 can employ, for example, foam metal and has a large number of holes 121. The void 121 is filled with an adhesive, and the orthodontic member 1 </ b> A is bonded to the tooth surface T by the adhesive.

  Also in this example, the outer peripheral edge portion 24 of the metal layer 21 does not protrude to the bottom surface 2 a of the base portion 2. As a result, when the orthodontic member is attached to the tooth surface T, light can be reliably applied to the adhesive filled in the holes 121, and the orthodontic member 1A can be attached to the tooth surface T with high adhesive strength. Can be attached to. At this time, it is preferable that the outer peripheral edge 24 of the metal layer 21 does not protrude further to the tooth surface T side than the surface 21 b on the tooth surface T side of the metal layer 21.

  In addition, as the porous body 120, there are a large number of bubbles contained in the metal, such as the foam metal shown in FIG. 7B, or a large number of small metal particles gathered together to form gaps between the metal particles. It is possible to adopt a device in which a minute space is formed.

(Mechanical lock body)
In addition to the porous body, the metal mesh as the adhesive holding layer can be, for example, a mechanical lock body as shown in FIGS. FIG. 8A is a side sectional view of the orthodontic member 1B of this example, and FIG. 8B is a bottom view thereof.

  The mechanical lock body 220 shown in FIG. 8 is a metal plate having a plurality of protrusions having a shape in which the tip of a conical protrusion is crushed. A plurality of convex portions 221 are provided on the surface on the tooth surface side of the mechanical lock body 220 so as to protrude from the reference surface 222 of the mechanical lock body 220 toward the tooth surface T side. The front end surface 221a of the convex portion 221 is a flat surface and can come into contact with the tooth surface T. The convex portion 221 is not formed on the outer peripheral edge of the base portion 2 as shown in FIG. The space around the convex portion 221 is filled with an adhesive, and the orthodontic member is bonded to the tooth surface T.

  Also in this example, the outer peripheral edge 24 of the metal layer 21 does not protrude to the bottom surface 2 a of the base portion 2, and particularly does not protrude to the reference surface 222. Thereby, when attaching the orthodontic member to the tooth surface T, light can be reliably applied to the adhesive filled in the recess, and the orthodontic member is attached to the tooth surface T with high adhesive strength. Can do. Further, as shown in FIG. 8B, since the convex portion 221 is not formed on the outer peripheral edge of the base portion 2, the light from the light irradiator is not easily blocked by the convex portion 221, and the rear portion is surely secured. The side adhesive can be irradiated with light.

  Note that the structure of the mechanical lock body 220 is not limited to that described above, and a cylindrical or cubic projection, a cone, a triangular pyramid or a quadrangular pyramid-shaped projection, or a plurality of combinations of these is a tooth surface T of the base portion. What was provided in the side surface can be employ | adopted.

<Base part of single layer structure>
In the above description, the base portion 2 has been described with an example having the metal layer 21 and at least one adhesive holding layer. However, the base portion 2 may be formed of only the metal layer 21. FIG. 9 is a side cross-sectional view of the orthodontic member 1C of this example.

  As shown in FIG. 9, in the orthodontic member 1 </ b> C of this example, the base portion 2 is composed of only a metal layer 320 formed from a single metal plate. In this example, the surface on the tooth surface T side of the metal layer 320 has a mechanical lock structure. In other words, the lower surface of the metal layer is provided with a plurality of convex portions 321 projecting from the reference surface 322 toward the tooth surface T side. The convex portion 321 is not formed on the outer peripheral edge of the metal layer 320. This orthodontic member 1 </ b> C is attached to the tooth surface T with an adhesive filled in the space around the convex portion 321 in a state where the tip surface 321 a of the convex portion 321 is in contact with the tooth surface T.

  Also in this example, the outer peripheral edge portion 324 of the metal layer 320 does not protrude to the tip end surface 321a of the convex portion 321 that is the tooth surface side surface of the metal layer 320. Thereby, when attaching the orthodontic member to the tooth surface T, the light from the light irradiator is less likely to be blocked by the convex portion 321, and the light can be reliably applied to the adhesive filled in the back, The orthodontic member can be attached to the tooth surface T with high adhesive strength. At this time, as shown in the drawing, it is preferable that the outer peripheral edge 324 of the metal layer 320 does not protrude to the tooth surface T side from the reference surface 322 that is the base of the convex portion 321.

  Such a base portion 2 is obtained by pressing a metal plate having a plurality of conical convex portions so as to crush the tips of the conical convex portions, and punching the metal plate into a desired shape. . At the time of punching, punching is performed so that the convex portion is not located on the outer peripheral edge. In addition, when the punching is performed after the half punching process as described above, the protruding amount of the outer peripheral edge portion 324a of the metal layer 321 to the tooth surface T side can be suppressed.

1: Orthodontic member, 2: Base portion, 21: Metal layer, 22: Mesh layer, 3: Bracket body

Claims (10)

A plate-like base portion whose bottom surface is bonded to the tooth surface;
A main body fixed to the upper surface of the base portion,
The base portion has a metal layer to which the main body is fixed on an upper surface thereof,
An orthodontic member, wherein an outer peripheral edge of the metal layer does not protrude to the bottom surface of the base portion.   The orthodontic member according to claim 1, wherein an outer peripheral edge of the metal layer does not protrude to a tooth surface side surface of the metal layer. The base portion is provided on the tooth surface side of the metal layer, and includes at least one adhesive holding layer capable of holding an adhesive,
The orthodontic member according to claim 1, wherein an outer peripheral edge of the metal layer does not protrude to a tooth surface side surface of the adhesive holding layer adjacent to the metal layer.   The orthodontic member according to claim 3, wherein an outer peripheral edge of the metal layer does not protrude to an intermediate position in a thickness direction of the adhesive holding layer adjacent to the metal layer.   The orthodontic member according to claim 4, wherein an outer peripheral edge of the metal layer does not protrude to a tooth surface side surface of the metal layer. The metal layer is formed by punching a metal plate,
6. The orthodontic member according to claim 1, wherein an outer peripheral edge of the metal layer is formed to extend toward a tooth surface side by the punching process.   The outer peripheral edge of the metal layer has a protruding length toward the tooth surface side suppressed by performing a half punching process before the punching is performed on a metal plate. Orthodontic member.   The orthodontic member according to any one of claims 1 to 5, wherein an adhesive is applied to the bottom surface of the base portion.   The adhesive holding layer is a porous body made of a metal mesh knitted with metal wires, a metal plate provided with a large number of holes, or a plurality of protrusions protruding toward the tooth surface on the tooth surface side. The orthodontic member according to any one of claims 3 to 5, wherein the orthodontic member includes at least one of a mechanical lock body provided with. The orthodontic member according to claim 1, wherein a plurality of convex portions projecting toward a tooth surface side are provided on a tooth surface side surface of the metal layer.

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