JP2001037780A - Arch wire, preparation therefor and spherical plate therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a Monson spherical plate where an arch chart for arch wire preparation is plotted capable of obstructing a Christensen phenomenon, smoothing muscles around the jaw and obstructing the change of an occlusion plane, an arch wire provided with a curve corresponding to an occlusion plane curve and the preparation method. SOLUTION: On the Monson spherical plate, an upper jaw dental arch curve 1 on a concave surface and a lower jaw dental arch curve on a convex surface are plotted and this arch wire for which a Monson curve is made along the arch is prepared.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an archwire corresponding to a curvature of an occlusal surface of a dentition and a spherical plate for producing the archwire. In particular, the present invention relates to a Monson spherical plate for making an archwire with a Monson curve that is bent and formed so as not to break the curve of Spee of the dentition arch of each individual in orthodontic full band treatment. . Furthermore, the present invention also relates to an archwire made using such a spherical plate and a method for making the same. It should be noted that the present invention relates more broadly to orthodontic treatment of the dentition.

[0002]

2. Description of the Related Art In conventional orthodontic full band treatment, emphasis is placed only on the aesthetic side, each tooth is arranged flat in an elevation view, and an archwire is formed by bending along a dental arch in a plan view. I was

[0003]

In such a treatment method, the teeth are arranged flat in an elevation view, so that the Christensen phenomenon appears, the movement of the muscle around the jaw is inhibited, and the occlusal plane is flattened. There is a problem that excessive pressure is applied to the teeth.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and has been made in order to prevent the Kristensen phenomenon, smooth the movement of the muscle around the jaw, and prevent the change of the occlusal plane. An object of the present invention is to provide a Monson spherical plate depicting an arch chart. From another viewpoint, the present invention also aims to provide an archwire having a curve corresponding to an occlusal curve and a method for producing the same.

[0005]

In order to achieve the above object, according to a first aspect of the present invention, a dental arch, a memory, and an arch reference line used for making an archwire are drawn on a Monson spherical plate.

In the present invention, "Monson spherical plate"
A substantially spherical plate having a spherical surface (or a partial spherical surface) corresponding to a curved surface with respect to the occlusal surface of the dentition. In lectures, the occlusal curve is called the Monson curve. Therefore, in the present invention, the virtual sphere including the Monson curve is referred to as a “Monson sphere” and correspondingly referred to as a “Monson sphere plate”. However, the diameter and the like are not necessarily adhered to this definition. Instead, it should be changed according to the actual condition of the patient's teeth.

[0007] The "Monson curve" in the course is
"A type of accommodation curve derived from GSMonson's spherical theory of jaw movement, which is 8 inches in diameter (1 inch is about 2.10 inches).
54 cm). (Electronic Encyclopedia of Color Edition, July 20, 1976, First Press, Eiensho Shoten, p. 703), which is, in effect, a kind of metal 8-inch diameter watch glass. Used to give the bite ridge an accommodation curve first, which is part of a spherical surface,
Its center is in the eyebrows (the ethmoid cock). The artificial tooth is arranged such that its incisal edge and both buccolingual cusps touch this spherical surface. With this arrangement, all dentures allow such artificial occlusion of the condylar path during mandibular movement in artificial dentures ”(ibid.). Here, the Monson sphere theory is "a hypothetical mandibular movement theory published by Monson in 1920" (Source: Ibid.), "In a well-developed mandible,
The condylar, anterior incisal and buccolingual cusps of the molars are located on one sphere, and the mandibular movement is performed as a sliding movement on this sphere. The major axis of each tooth is toward the center of the sphere, the center is at the midline of the ethmoid cock, and the radius is said to average 4 inches "(ibid.).

The means for achieving the above object according to another aspect of the present invention are listed below.

In a second aspect of the present invention, the concave surface of the Monson spherical plate is drawn with an arch chart of an upper dentition arch curve and a memory arch reference line, and the portion where the front teeth hit has a flat portion formed flat. Is preferred.

According to a third aspect of the present invention, the convex portion of the Monson spherical plate has a lower dentition arch curve, an arch chart of a memory and an arch reference line drawn therein, and a portion corresponding to the front teeth has a flat portion formed flat. It is preferred to have.

In a fourth aspect of the present invention, the bottom of the Monson spherical plate is preferably provided with legs.

In a fifth aspect of the present invention, the dental arch arch curve is a curve along the contour (buccal side) of the dental row in a projection view as viewed from the direction of the center of the sphere of the Monson spherical plate. Preferably, the axis of symmetry of the curve passes through the center of the Monson spherical plate.

In a sixth aspect of the present invention, the arch reference line is defined by a symmetrical axis of a dental arch curve and a tangent at a vertex of the dental arch curve in a projection view from the direction of the center of the sphere of the Monson spherical plate. It is preferred to include.

In a seventh aspect of the present invention, the memory line is a straight line connecting the center points of the left and right canines and the left and right first molars in a projection view as viewed from the direction of the center of the sphere of the Monson spherical plate. It is preferable to include a straight line connecting the center points.

According to an eighth aspect of the present invention, in the projection as viewed from the direction of the center of the sphere of the Monson spherical plate, the plane portion has an axis of symmetry coincident with the axis of the dentition arch curve, and the direction of the plane is the tooth. The curve opposite to the column arch curve is used as the contour,
It is preferable that the intersection of the curve and the dental arch curve substantially coincides with the positions of the left and right canines.

In a ninth aspect of the present invention, it is preferable that the Monson spherical plate has a radius of curvature of a reference dimension or various dimensions different from this.

In a tenth aspect of the present invention, the Monson spherical plate has a partial spherical surface corresponding to the curvature of the occlusal surface of the dentition.
And a memory for measuring the position of a dental arch curve or archwire drawn or placed on the spherical surface.

According to an eleventh aspect of the present invention, it is preferable that the Monson spherical plate has a flat portion in which at least a portion to be contacted by the front teeth is formed horizontally.

In a twelfth aspect of the present invention, it is preferable that the Monson spherical plate has a tooth arch curve and a memory on a concave surface or a convex surface, or on both surfaces.

In a thirteenth aspect of the present invention, the concave or convex surface or both surfaces of the Monson spherical plate includes an arch reference line forming a symmetry axis of a dental arch curve, and the memory stores the dental arch. Preferably, it is formed in a direction representing the lateral position of the curve.

According to a fourteenth aspect of the present invention, it is preferable that in the method of forming an archwire, the occlusal surface curve corresponding to the dental arch curve is formed on the archwire using the Monson spherical plate.

According to a fifteenth aspect of the present invention, an archwire produced by the above-described method for producing an archwire contributes to achieving the above object.

In a sixteenth aspect of the present invention, a planar projection shape substantially corresponding to a planar projection shape of a dentition and a curvature corresponding to a curvature of an occlusal surface, that is, a curvature (Monson curve) of an occlusal surface are described. An archwire having a corresponding curvature in the spherical surface of the Monson spherical plate contributes to the above purpose.

In a seventeenth aspect of the present invention, the material of the archwire may be a shape memory alloy, stainless steel, or other known materials available for dental use.

[0025] In an eighteenth aspect of the present invention, at the intersection of the dentition arch curves of the first left and right molars and the left and right canines, a tangent of the memory at the intersection and a tangent of the dentition arch curve are provided. Can be described so as to be substantially orthogonal to each other.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION On the concave surface of a Monson spherical plate, an arch chart composed of an arch curve of an upper dentition, a memory and an arch reference line is drawn. It should be noted that various types of arch charts (that is, those for men and women, colored persons, whites, etc., and various grades representing typical occlusal surface curvature) may be prepared.
The concave arch chart is smaller than the convex arch chart.

On the convex surface of the Monson spherical plate, an arch chart including a lower dentition arch curve, a memory, and an arch reference line is drawn. Various arch charts for concave and convex surfaces are preferably prepared. In other words, it is preferable to prepare various dimensions which are different from the average (reference) dimension by a greater or smaller value.

The front tooth of the Monson spherical plate is made flat and made flat. The portion where the front teeth come into contact with the plane portion is horizontal when the Monson spherical plate is viewed from the front. That is, the front teeth are arranged horizontally, which has an aesthetic effect that the arrangement of the front teeth becomes visually clear by arranging the front teeth horizontally.

It is preferable to provide a leg at the bottom of the convex surface as a rolling prevention device for mounting. Note that the function is not limited to these modes as long as the function is the same.

The memory is drawn at the forward (front) portion of the dental arch curve and at both (open) ends of the arch curve.

The arch reference line includes at least the axis of symmetry of the arch, and is preferably formed so that the horizontal line of the curved tip of the dental arch curve and the vertical line of the center of the arch intersect vertically.

The arch wire is formed by bending the wire along the arch curve drawn on the Monson spherical plate. As a result, an archwire having a curvature corresponding to the curvature of the occlusal surface (also referred to as a Monson curve) is obtained.

The arch wire may be provided with a curve corresponding to the curvature of the occlusal surface (Monson curve) on the spherical surface of the Monson spherical plate in advance.

[0034]

An embodiment of the present invention will be described with reference to the drawings.

1 and 2, an arch curve 1 is drawn on the concave surface of the Monson spherical plate at the center of the concave surface, and the memory 3,
4 are drawn near the open ends and near the closed (distal) end of the arch curve 1, respectively. The arch reference line 5 is drawn at the center of the tip of the arch curve 1 and the median position at both ends of the arch curve 1 to create an arch chart, and the portion 2 of the Monson spherical plate that is in contact with the front teeth is formed flat.

3 and 4, an arch curve 8 is drawn on the convex surface of the Monson spherical plate at the center of the convex surface, and
1, 12 are drawn near the open ends and near the closed (distal) end of the arch curve 8, respectively. The arch reference line 6 is drawn at a central portion of the distal end of the arch curve 8 and at a right angle to the arch reference line 5 as a tangent to the distal end of the arch curve 8 of the arch reference line 5. FIG. 4 shows an arch chart, in which a portion 7 corresponding to the front teeth of the Monson spherical plate is formed as a flat portion. As shown in FIG. 5, the flat part 7 is designed for the front teeth, and the slope part 7 combined with the spherical part is provided.
With a, it spreads substantially horizontally. Slope 7
a is formed as a curved triangular slope.

7 and 8, the memories 15, 16,
23 and 24 are drawn such that, at the intersections of the dentition arch curves 13 and 20 of the left and right first molars and the left and right canines, the tangents of the memory and the dentition arch curves at the intersections are substantially orthogonal. Thereby, the moving amount and direction of the fixed point on the archwire can be accurately known. In other words, a point on the archwire always moves along the memory when moving. At this time, the memory may not have a central portion as shown.

The legs 9 and 10 are provided between both sides of the convex arch curve 8 of the Monson spherical plate and the arch reference line 5. The legs prevent rolling when the spherical plate is placed, and the shape is not limited to that shown in the figure. For example, small projections may be provided at each vertex of the triangle.

The dentition arches 1 and 8 are curves along the outer (buccal) contour of the dentition. As an example, in the projection view from the center of the sphere of the Monson spherical plate, the center of the circle is shown. One example is a parabola through which the axis of symmetry passes. The dentition arch curve is also curved on a perspective plane that includes its axis of symmetry and is perpendicular to the projection (Spie curve).

When a Monson curve is previously formed on the arch wire, when the arch wire is placed on the dentition arch, the center of the circle in the projected view as viewed from the center of the Monson spherical plate is indicated by the axis of symmetry. Draws a parabola that passes through and is curved (Spy curve) even on a plane that includes the axis of symmetry and is perpendicular to the projection view.

In the projection view from the center of the sphere of the Monson spherical plate, the memories 3 and 11 include straight lines connecting the center points of the left and right first molars, and the memories 4 and 12 connect the center points of the left and right canines. Including straight lines. The intersections of the curves forming the contours of the plane portions 2 and 7 and the dentition arch curves 1 and 8 correspond to the center points of the left and right canines.

Dental arch curves 1, 8, memories 3, 4, 1
Reference numerals 1 and 12 may preliminarily describe a standard size or a size corresponding to individual differences (sex, race, etc.) on the Monson spherical plate. In this case, a tooth model is applied, and a model having a suitable dimension is selected. Alternatively, the positions of the first left and right molars and the left and right canines may be determined by applying the tooth model to the Monson spherical plate, and then the dental arch curves 1 and 8 and the memories 3, 4, 11, and 12 may be described. In this case, since it is sufficient that the position of the tooth serving as the reference can be specified, the dental arch curves 1 and 8 and, in some cases, the memories 3, 4, 1
1, 12 can also be omitted.

As described above, since it is sufficient that the positions of the reference teeth (first molars and canines) can be specified, even if the arch chart is previously written on the Monson spherical plate, the arch reference is used. The lines 5 and 6 can also be omitted, and some alternative markings can be made if necessary.

The Monson spherical plate is part of a spherical surface having a radius of curvature of about 10 cm (standard dimension) in the course of study, but since the occlusal curve may vary depending on individual differences (sex, race, etc.). It is also possible to prepare various sizes corresponding to this. In addition, the material of the Monson spherical plate is formed of a material such as metal or plastic including transparent or translucent, which keeps a fixed shape. However, when it is necessary to adapt to the actual occlusal surface due to individual differences, a deformable material is used. Things can also be adopted.

Depending on the size of the Monson spherical plate (the radius of curvature), archwires (including those with a Monson curve) of various sizes standardized for mass production can be produced. it can.

The arch wire may have various cross-sectional shapes such as circular, square and rectangular as necessary, and may be made of "Truechrome" (stainless steel wire), or "Elgiloy wire" (Rocky Mountain Morita Co., Ltd.), trade name “Walabi”, trade name “Azroy” (Omco Co., Ltd.)
In addition, use a shape memory alloy such as "Naitai" (nickel / titanium alloy), "TMA" (titanium / molybdenum alloy) (trade name: Ohmco Co., Ltd.), and other products applicable to dental applications. be able to.
In addition to single wires, twisted wires (multi stran
d), multiple wires are woven into a rectangular cross section (mult
i strand braided rectangular) (for example, product name "Force 9", Ohmco Co., Ltd.), an axis and a plurality of wires wound spirally around it, and other various forms applicable to dental use including. By using a shape memory alloy, replacement of the archwire becomes unnecessary, and the number of adjustments can be reduced.

When a shape memory alloy is used, at least a curve corresponding to the Monson spherical surface is stored, and the stored shape can be stored as a first or second (or multi-stage) shape. Therefore, for example, the first memory shape is a shape substantially corresponding to the planar projection shape of the dentition, and the second memory shape is a specific curved shape corresponding to the occlusal surface curvature, or a different planar shape. Each step may be stored so as to be transformed into one or both of a projected shape or a different occlusal surface corresponding shape. In addition, various storage modes and stages are possible.

It should be noted that, regarding the way of shape memory, known means or other appropriate means can be used according to the characteristics of the alloy.

On a Monson spherical plate on which an arch chart is drawn, a model of a tooth prepared by an ordinary method is stored in memories 3, 4, 11, and 12 corresponding to the left and right first molars and the left and right canines.
The archwire is set so as to be located at the intersection of the archwire and the archwire, the archwire is curved along the Monson sphere and the contour of the dentition, and the points where the archwire passes are written on the memories 3, 4, 11, and 12. Accordingly, the amount of movement of the archwire to an appropriate position (target position) over time after the installation of the archwire can be confirmed stepwise, and as a result, correction is facilitated. The installation of the archwire on the tooth can be performed, for example, by attaching a bracket whose groove angle matches the Spee curve to the tooth and inserting the archwire into the bracket. At this time, if the arch wire is previously provided with a curve and a Monson curve corresponding to the contour of the dentition, it becomes easy to determine the passing point (starting point) of the wire on the memory. Further, if the archwire is made of a shape memory alloy, it is not necessary to replace the archwire, and the number of adjustments can be reduced.

When the arch chart is not drawn in advance on the Monson spherical plate, a tooth model prepared by a standard method is set on the Monson spherical plate such that the left and right canines are on the contour curve of the plane portion. The positions of the canines and the left and right first molars are specified, and marks for displaying them are written on the Monson sphere. The point where the archwire passes is described in the vicinity. Subsequent treatment is the same as the case where the arch chart is drawn in advance.

[0051]

Since the present invention is configured as described above, it has the following effects.

The Kristensen phenomenon can be prevented by arranging each tooth by attaching a Monson curve to the bent arch wire.

When orthodontics are performed using this archwire, the teeth are not arranged in a plane and the Monson curve does not hinder the smooth movement of the muscles around the jaw.

Since the teeth are not arranged in a plane, an even orthodontic force can be applied to each tooth.

Since a memory is provided on the dental arch on the Monson spherical plate in order to make it uniform in each step, the arch wire can be bent uniformly. The memory allows the archwire spacing to be set accurately and at other stages in accordance with the degree of progress of the correction at each stage of the correction.

The curve of the archwire in advance corresponding to the curve of the occlusal surface (Monson curve) facilitates adjustment on the tooth model. Further, by using a shape memory alloy as the material of the arch wire, replacement of the arch wire becomes unnecessary, and the number of adjustments can be reduced.

[Brief description of the drawings]

FIG. 1 is a concave perspective view of a Monson spherical plate depicting a dental arch chart.

FIG. 2 is a concave top view of a Monson spherical plate depicting a dental arch chart.

FIG. 3 is a convex perspective view of a Monson spherical plate depicting a dental arch chart.

FIG. 4 is a top view of a convex surface of a Monson spherical plate depicting a dental arch chart.

FIG. 5 is a view of a Monson spherical plate depicting a dental arch chart viewed from the side and the tip of the arch with the convex surface facing down.

FIG. 6 is a diagram of the Monson spherical plate on which the arch arch chart is drawn, viewed from the side of the arch chart from the side, with the convex surface facing down.

FIG. 7 is a concave top view of another embodiment of a Monson spherical plate depicting a dental arch chart.

FIG. 8 is a top view of a convex surface of another embodiment of a Monson spherical plate depicting a dental arch chart.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Maxillary dentition arch curve 2 Front tooth hitting part 3 Memory 4 Memory 5 Reference line 6 Reference line 7 Front tooth hitting part 7a Slope part 8 Mandibular dentition arch curve 9 Leg 10 Leg 11 Memory 12 Memory 13 Maxillary dentition arch curve 14 Part where the front teeth hit 15 Memory 16 Memory 17 Reference line 18 Reference line 19 Part where the front teeth hit 20 Mandibular dentition arch curve 21 Leg 22 Leg 23 Memory 24 Memory

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[Procedure amendment]

[Submission date] August 11, 2000 (2008.1.
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Wherein said memory is at the intersection of the tooth arch curves of the left and right first molar and the left and right canines, the tangent of the tangent line and the tooth arch curve of the memory is substantially perpendicular in intersection points, The Monson spherical plate according to any one of claims 1 to 4, wherein:

Wherein said Monson spherical plate include those of various different sizes from those or its radius of curvature reference size, Monson spherical plate according to claim 1, one 5, characterized in that.

7. A partial spherical surface corresponding to the curvature of the occlusal surface of the dentition,
And a Monson spherical plate having a memory for measuring the position of a dental arch curve or archwire drawn or placed on the spherical surface.

8. further comprising at least flat portion portions horizontally formed parked in the front teeth, and wherein the claim 7
The Monson spherical plate according to 1.

9. Monson spherical plate according to claim 7 or 8 wherein the concave or convex of the Monson spherical plate, or with both surfaces of the teeth arch and a memory, characterized in that.

10. A concave or convex surface, or both surfaces, of said Monson spherical plate including an arch reference line forming an axis of symmetry of a dentition arch curve, wherein said memory has a direction indicating a lateral position of said dentition arch curve. 10. The Monson spherical plate according to claim 9 , wherein the spherical plate is formed as follows.

11. Using Monson spherical plate according to one of claims 1 to 10, to form the occlusal plane distortion corresponding to the teeth arch curve archwire archwire created wherein the.

12. An archwire produced by the method for producing an archwire according to claim 11 .

13. archwire having a curved corresponding to curved of the occlusal surface of the planar projection shape and dentition that substantially corresponds to the plane projected shape of the dentition.

14. The archwire according to claim 12 , wherein the material is made of a shape memory alloy.

Claims (18)

[Claims] 1. A Monson spherical plate, wherein a dental arch curve, a memory and an arch reference line used for preparing an archwire for orthodontic full band treatment are drawn. 2. An arch curve of an upper dentition arch curve, a memory, and an arch reference line is drawn on a concave surface of the Monson spherical plate, and a portion corresponding to an anterior tooth has a flat portion formed flat. Item 4. A Monson spherical plate according to Item 1. 3. The convex surface of the Monson spherical plate draws an arch curve of a lower dentition arch line, a memory, and an arch reference line, and a portion corresponding to the anterior tooth has a flat portion formed flat. Item 4. A Monson spherical plate according to Item 1. 4. The Monson spherical plate according to claim 3, wherein legs are provided at the bottom of the Monson spherical plate. 5. The dentition arch curve, when viewed from the direction of the center of the sphere of the Monson spherical plate, draws a curve along the outline (buccal side) of the dentition, and the axis of symmetry of the curve is The Monson spherical plate according to claim 1, wherein the Monson spherical plate passes through the center of the Monson spherical plate. 6. The arch reference line includes a symmetrical axis of a dentition arch curve and a tangent at a vertex of the dentition arch curve in a projection view as viewed from the direction of the sphere center of the Monson spherical plate.
The Monson spherical plate according to any one of claims 1 to 5, wherein: 7. The memory includes a straight line connecting the center points of the left and right canines and a straight line connecting the center points of the left and right first molars in a projection view as viewed from the direction of the center of the sphere of the Monson spherical plate. The Monson spherical plate according to any one of claims 1 to 6, characterized in that: 8. The plane portion has a symmetry axis coincident with an axis of a dental arch curve and a direction opposite to the dental arch curve in a projection view as viewed from the center of the sphere of the Monson spherical plate. The Monson spherical plate according to any one of claims 1 to 7, wherein the curve is a contour, and an intersection of the curve and the dental arch curve substantially coincides with the positions of the left and right canines. 9. The Monson spherical plate according to claim 1, wherein said Monson spherical plate includes one having a radius of curvature of a reference dimension or various dimensions different therefrom. 10. A monson with a partial sphere corresponding to the curvature of the occlusal surface of the dentition and a memory for measuring the position of the dentition arch curve or archwire drawn or placed on the sphere. Spherical plate. 11. The Monson spherical plate according to claim 10, further comprising a flat portion having at least a portion to be brought into contact with the front teeth formed horizontally. 12. The Monson spherical plate according to claim 10, wherein the Monson spherical plate has a tooth arch and a memory on a concave surface or a convex surface, or both surfaces. 13. A concave or convex surface or both surfaces of said Monson spherical plate, comprising an arch reference line forming an axis of symmetry of a dentition arch curve, wherein said memory stores a direction representing a lateral position of said dentition arch curve. 13. The method according to claim 12, wherein:
The Monson spherical plate according to 1. 14. A method for producing an archwire, comprising using the Monson spherical plate according to claim 1 and forming an occlusal surface curve corresponding to the dentition arch curve on the archwire. . 15. An archwire produced by the method for producing an archwire according to claim 14. 16. An archwire having a planar projection shape substantially corresponding to the planar projection shape of the dentition and a curvature corresponding to the curvature of the occlusal surface of the dentition. 17. The archwire according to claim 15, wherein the material is made of a shape memory alloy. 18. The method according to claim 18, wherein a tangent of the memory at the intersection with the dentition arch curve at the first left and right molars and the left and right canines is substantially orthogonal to a tangent of the dentition arch curve at the intersection. The Monson spherical plate according to any one of claims 1 to 4, wherein: