JP2007260159A - Orthodontic appliance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an orthodontic appliance which applies torque to teeth subjected to orthodontic treatment. <P>SOLUTION: A current generating part 30 of the appliance passes a direct current to a coil 20 and generates a magnetic field in the coil 20. A permanent magnet 10 is attached to a tooth 3a of a person Z subjected to the orthodontic treatment. Since an opposite force is applied to the south pole and the north pole of the permanent magnet 10, the torque to induce rotations is applied to the tooth 3a. Consequently, the tooth 3a is straightened. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an orthodontic apparatus that corrects the dentition of an animal such as a person.

Conventionally, there are orthodontic appliances that use wires and mouthpieces, which are known to apply a constant force to the dentition with the return force of the wires and mouthpieces to cure teeth alignment and meshing. ing. That is, when a constant force is applied to the dentition, orthodontics is performed based on the principle that the alveolar bone supporting the teeth in the gums is gradually deformed. In recent years, various studies have been made for the purpose of shortening correction time. For example, in Patent Document 1, a mouthpiece having a proper meshing shape is attached to a patient and electrically connected to the mouthpiece. A technique for applying vibration to a mouthpiece by using an ultrasonic motor is disclosed.
U.S. Pat. No. 4,348,178

  However, there is no conventional orthodontic appliance that imparts torque that restores the twist to be corrected. Further, in the method of Patent Document 1, since the ultrasonic motor is electrically connected to the mouthpiece, wiring or the like connecting the mouthpiece and the ultrasonic motor enters the mouth, causing pain to the patient. There is a problem of giving.

  The objective of this invention is providing the orthodontic apparatus which provides the torque which returns the twist with respect to the tooth which the way of attaching twists.

  An orthodontic apparatus according to the present invention provides a torque applying means for applying mechanical stimulation to a plurality of points of a tooth to be corrected and applying torque for correcting the tooth to be corrected to the tooth to be corrected; The torque applying means comprises drive means for driving the torque applying means so as to apply torque to the teeth.

  According to this configuration, the torque application means receives a driving force from the drive means, and applies mechanical stimulation to a plurality of points of the tooth to be corrected, thereby applying torque to the tooth. Therefore, it is possible to provide an orthodontic apparatus that applies torque to teeth to be corrected.

  Further, in the above configuration, it is preferable that the torque applying unit is made of a magnetic material, and the driving unit applies a magnetic field to the magnetic material to drive the torque applying unit.

  According to this configuration, since the torque applying means is formed of a magnetic material, when a magnetic field in one direction is applied to the magnetic material, a diametrically opposite force is generated between the S pole and the N pole, and the correction target A stable torque can be applied to the teeth. In addition, since the magnetic body is driven via a magnetic field, the torque applying means and the driving means can be configured in a non-contact manner, and electrical wiring or the like is not required for the torque applying means attached to the teeth. The burden on the patient during treatment can be reduced.

  Moreover, the said structure WHEREIN: It is preferable that the said torque provision means is attached to the mouthpiece with which the 1 or several tooth | gear containing the tooth | gear of the correction object is mounted | worn.

  According to this structure, since it is attached to the mouthpiece, it is easy to attach the teeth of the torque applying means.

  Further, in the above configuration, the plurality of action points are a first action point existing on one surface of the tooth to be corrected and the one surface, and positions different from the first action point. It is preferable that the torque applying means applies a force in the opposite direction to the first action point and the second action point.

  According to this configuration, torque can be reliably applied to the teeth.

  In the above configuration, the plurality of action points include a first action point existing on one surface of the tooth to be corrected and a second action existing on a surface opposite to the one surface. It is preferable that the torque applying means applies forces in opposite directions to the first action point and the second action point, respectively.

  According to this configuration, torque can be reliably applied to the teeth.

  The orthodontic apparatus according to the present invention can provide an orthodontic apparatus that applies torque to teeth.

FIG. 1 shows an overall configuration diagram of an orthodontic apparatus 1 according to an embodiment of the present invention. The orthodontic appliance 1 includes a permanent magnet (magnetic body) 10, a coil 20, and a current generator 30. The permanent magnet 10 is attached to the tooth 3a to be corrected by the person Z, and applies a torque (torsional moment) to the tooth 3a by the magnetic field generated by the coil 20. As the permanent magnet 10, a ferrite magnet containing iron, a neodymium-iron-boron or samarium-cobalt rare earth magnet having a very large maximum energy product (BH) _max [J / m ³ ] is used. It is preferable. Moreover, the attachment method of the permanent magnet 10 with respect to a tooth | gear may be affixed directly using a dental bond etc., and may be fixed to a tooth | gear using a wire. In any case, any method may be adopted as long as the force by the permanent magnet 10 can be applied to the teeth. The permanent magnet 10 has a cylindrical shape or a prismatic shape.

  The coil 20 is formed of a circular coil, and is arranged so that the axis C1 faces in the horizontal direction. The coil 20 generates a magnetic field by the current generated by the current generator 30, and applies torque to the permanent magnet 10. Specifically, the coil 20 includes a cylindrical bobbin 22 and an electric wire 21 wound around the bobbin 22 with a predetermined number of turns. The diameter of the bobbin 22 is larger than the size of the cross section of the face of the person Z. The current generator 30 generates a magnetic field in the coil 20 by supplying a direct current to the coil 20.

  In the orthodontic appliance 1 configured as described above, the person Z wearing the mouthpiece 40 is on the face of the coil 20 so that the mouth is located on the axis C1 of the coil 20 and at the center of the coil 20. Insert. Thereby, a magnetic field acts on the permanent magnet 10 attached to the mouthpiece 40, and a torque is applied to the permanent magnet 10, and the permanent magnet 10 applies a torque to the teeth to be corrected.

  In FIG. 1, a bed for laying the person Z may be provided. In this case, since the magnetic field in the vicinity of the central axis of the coil 20 is stable, it is preferable that the bed has such a height that the mouth of the person Z is located on the central axis of the coil 20. In FIG. 1, the coil 20 may be arranged so that the axis C <b> 1 of the coil 20 faces the vertical direction. In this case, the person Z puts his face inside the coil 20 in a standing posture. In this case, an adjustment mechanism (not shown) that can adjust the height of the coil 20 according to the height of the person Z may be attached to the coil 20. Further, when the coil 20 is disposed so that the axis C1 of the coil 20 is oriented in the vertical direction, the person Z may be seated on a chair instead of standing up. By doing so, the burden on the person Z can be further reduced.

  FIG. 2 is a block diagram showing a detailed configuration of the current generator 30. The current generator 30 includes a control device 31, a D / A converter 32, and an amplifier 33. The control device 31 includes a personal computer including a display device such as a liquid crystal panel, an input device such as a mouse and a keyboard, a CPU, a ROM, a RAM, and a hard disk.

  The hard disk stores a current setting program for setting the value of the direct current flowing through the coil 20 input using the input device, and the CPU is set by the user by executing this current setting program. The digital current data that determines the magnitude of the current is output to the D / A converter 32.

  The D / A converter 32 is connected to the control device 31 via, for example, a USB cable, and the current data output from the control device 31 is digital / analog converted and output to the amplifier 33 as a direct current. The amplifier 33 amplifies the direct current output from the D / A converter 32 with a predetermined gain and outputs the amplified direct current to the coil 20.

  FIG. 3 is a view showing the tooth 3a when the permanent magnet 10 is attached to the tooth 3a to be corrected so that the longitudinal direction is in the left-right direction when viewed from the front, and (a) shows the tooth 3a. A left side view is shown, (b) shows a sectional view from the upper surface of the tooth 3a, and (c) shows a front view of the tooth 3a. In FIG. 3, the z direction indicates the direction in which the teeth 3a extend, and the x, y, and z directions are orthogonal to each other. In the case of FIG. 3, as shown in FIG. 3B, a clockwise torque is applied to the tooth 3 a in a top view, the clockwise rotation of the tooth 3 a is induced, and the current direction of the tooth 3 a indicated by a solid line is determined. The tooth 3a is moved in the direction indicated by the dotted line rotated clockwise by a predetermined angle.

  For this purpose, as shown in FIG. 3C, the N pole is located on the left end side of the tooth 3a surface, and the S pole is located on the right end side of the tooth 3a surface (the magnetic moment M is on the right side in front view). The permanent magnet 10 is disposed so that the magnetic field H is applied in the direction (+ y direction) from the front surface to the back surface of the tooth 3a. As a result, as shown in (b), the tooth 3a is applied with a force Fn in the + y direction on the surface application point P1 of the permanent magnet 10 on which the north pole is located, and the surface action point on the surface located on the south pole. A force Fs directed in the -y direction is applied to P2, and a clockwise torque is applied in a top view. Thereby, the tooth 3a is induced to rotate clockwise in a top view, and finally moves from the direction indicated by the solid line to the direction indicated by the dotted line, and the twist of the tooth 3a is corrected. The surface of the tooth 3a indicates the lip side surface of the tooth 3a, and the back surface of the tooth 3a indicates the lingual surface of the tooth 3a.

  Further, as shown in FIG. 3, in order to make the magnetic field H orthogonal to the direction of the magnetic moment M, the direction of the magnetic moment M and the direction of the magnetic field H are set in the coil 20 so as to be orthogonal to each other. The direction of the face of the person Z may be determined. The face orientation can be easily determined because the direction of the magnetic field H and the direction of the magnetic moment M are known in advance. Even if the permanent magnet 10 is attached to the back side of the tooth so that the longitudinal direction is the left-right direction, the N pole is the left side of the tooth 3a in front view, and the S pole is the right side of the tooth 3a in front view, FIG. Similar torque can be applied to the teeth 3a.

  FIG. 4 is a view showing the teeth 3a when the permanent magnet 10 is attached to the teeth 3a to be corrected so that the longitudinal direction is the vertical direction in a front view, and (a) shows the teeth 3a. A left side view is shown, (b) shows a sectional view from the upper surface of the tooth 3a, and (c) shows a front view of the tooth 3a. Note that the x to z directions shown in FIG. 4 are the same as the directions shown in FIG. In the case of FIG. 4, as shown in (a), a counterclockwise torque is applied to the tooth 3a in a left side view to induce a counterclockwise rotation of the tooth 3a, and the current tooth 3a shown by a solid line Is moved to the direction of the tooth 3a indicated by the dotted line rotated counterclockwise by a predetermined angle.

  For this purpose, as shown in FIG. 4A, the N pole is located at the upper end in the left side view, and the S pole is located in the lower side in the left side view (the magnetic moment M is lowered in the left side view). The permanent magnet 10 is attached to the surface of the tooth 3a (from the side to the top). And the magnetic field H is provided to the direction (-y direction) which goes to the surface from the back surface of the tooth | gear 3a. Thereby, as shown in (a), the tooth 3a is given a force Fn in the -y direction to the action point P1 of the surface where the N pole of the permanent magnet 10 is located, and the tooth 3a of the tooth 3a located at the S pole A force Fs directed in the + y direction is applied to the surface action point P2, and a counterclockwise torque is applied to the teeth 3a in the left side view. As a result, the tooth 3a is induced to rotate counterclockwise in a side view, and finally moves from the direction indicated by the solid line to the direction indicated by the dotted line, and the twist is corrected.

  As shown in FIG. 4, in order to make the magnetic field H orthogonal to the direction of the magnetic moment M, the direction of the magnetic moment M and the direction of the magnetic field H are set in the coil 20 so as to be orthogonal to each other. The direction of the face of the person Z may be determined.

  FIG. 5 is a diagram showing the teeth 3a when the permanent magnet 10 is attached to the teeth 3a to be corrected so that the longitudinal direction is in the vertical direction when viewed from the front, and (a) shows the teeth 3a. A left side view is shown, (b) shows a sectional view from the upper surface of the tooth 3a, and (c) shows a front view of the tooth 3a. Since the xz direction shown in FIG. 5 is the same as the direction shown in FIG. 3, description is abbreviate | omitted. In the case of FIG. 5, as shown in FIG. 5C, a counterclockwise torque is given to the tooth 3 a in a front view to induce a counterclockwise rotation of the tooth 3 a, and the current direction of the tooth 3 a indicated by a solid line is changed. Then, the tooth 3a is moved in the direction indicated by the dotted line rotated counterclockwise by a predetermined angle.

  For this purpose, as shown in FIG. 5C, the N pole is located at the upper end in the front view, and the S pole is located in the lower side in the front view (the magnetic moment M is from the lower side to the upper side in the front view). The permanent magnet 10 is attached to the surface of the tooth 3a. And the magnetic field H is provided with respect to the tooth | gear 3a in the direction (-x direction) which goes to the left side from the right side by front view. As a result, as shown in (c), the tooth 3a is given a force Fn in the left direction (−x direction) when viewed from the front, to the action point P1 on the surface where the N pole of the permanent magnet 10 is located. A force Fs directed in the right direction (+ x direction) in the front view is applied to the action point P2 on the surface located at the pole, and a counterclockwise torque is applied to the teeth 3a in the front view to promote tilt movement. Power works. As a result, the tooth 3a is induced to rotate counterclockwise when viewed from the front, and finally moves from the direction indicated by the solid line to the direction indicated by the dotted line to correct the twist.

  As shown in FIG. 5, in order to make the magnetic field H orthogonal to the direction of the magnetic moment M, the direction of the magnetic moment M and the direction of the magnetic field H are orthogonal to each other in the coil 20. The direction of the face of the person Z may be determined.

  FIG. 6 is a view showing the tooth 3a when two permanent magnets 10 are attached to the tooth 3a to be corrected, (a) is a left side view of the tooth 3a, (b) Shows a cross-sectional view from the upper surface of the tooth 3a, and (c) shows a front view of the tooth 3a. Since the xz direction shown in FIG. 6 is the same as the direction shown in FIG. 3, description is abbreviate | omitted. In the case of FIG. 6, as shown in FIG. 6B, a clockwise torque is applied to the tooth 3 a in a top view to induce the tooth 3 a to rotate clockwise, and the current direction indicated by a solid line is The tooth 3a is moved in the direction indicated by the dotted line rotated clockwise by a predetermined angle.

  For this purpose, as shown in FIG. 6B, a permanent magnet 101 is attached to the left end side of the surface of the tooth 3a so that the magnetic moment M is directed from the left side to the right side (+ x direction) when viewed from above, and the tooth 3a The permanent magnet 102 is attached to the right end side of the back surface of the magnet so that the magnetic moment M is directed from the left side to the right side (+ x) in the top view. And the magnetic field H is provided to the direction (-y direction) from the back surface side of the tooth | gear 3a to the surface side. As a result, the tooth 3a has a force Fn from the back surface of the tooth 3a to the surface direction (-y direction) at the action point P1 on the back surface of the tooth 3a where the N pole of the permanent magnet 102 is located, as shown in FIG. Is applied, and a force Fs is applied to the acting point P2 on the surface of the tooth 3a located on the south pole of the permanent magnet 101 in the direction from the front surface to the back surface (+ y direction). Torque is applied. As a result, the tooth 3a is induced to rotate clockwise in a top view, and finally the direction of the tooth 3a is moved from the direction indicated by the solid line to the direction indicated by the dotted line, and the twist of the tooth 3a is corrected. .

  The permanent magnets 101 and 102 shown in FIG. 6 are attached to the mouthpiece 40 that the person Z wears on the teeth. FIG. 7 shows an exploded perspective view of the mouthpiece 40 to which the permanent magnets 101 and 102 are attached when viewed from the front side. FIG. 8 is an exploded perspective view when the mouthpiece 40 is viewed from the back side. The mouthpiece 40 includes an inner mouthpiece 43 that directly covers the dentition 3 and an outer mouthpiece 42 that covers the outer side of the inner mouthpiece 43. The outer mouthpiece 42 and the inner mouthpiece 43 are overlapped inward and outward. It has a combined structure.

  As the material of the inner mouthpiece 43 and the outer mouthpiece 42, a material that is normally used as a mouthpiece material and in which sanitary safety is ensured, for example, EVA (ethylene vinyl acetate resin) that is a polymer material, thermoplasticity It is preferable to use materials such as plastics, thermoplastic selection elastomers, and silicone rubbers because the effects of allergies to teeth and gums can be suppressed.

  In addition, although the material of the outer mouthpiece 42 and the inner mouthpiece 43 is not limited to the EVA sheet, the EVA sheet is more preferable because it has electrical insulation and functions as a heat insulating material. In particular, when an EVA sheet is used for the inner mouthpiece 43, the inner mouthpiece 43 can be made soft, thereby preventing damage to the teeth to be corrected by the torque applied by the permanent magnets 101 and 102. It becomes possible.

  As shown in FIG. 8, the permanent magnet 101 is inserted into the convex portion 41 of the outer mouthpiece 42, the permanent magnet 102 is inserted into the convex portion 44 of the inner mouthpiece 43, and the inner mouthpiece 43 is bonded to the outer mouthpiece 42. . As a result, the permanent magnets 101 and 102 are attached to the mouthpiece 40. Here, the outer mouthpiece 42 and the inner mouthpiece 43 are integrated by being joined in a watertight manner using, for example, wearing for ultrasonic waves or adhesion. As a result, saliva, washing water, etc. are prevented from entering the inner surfaces of the outer mouthpiece 42 and the inner mouthpiece 43, and saliva, washing water, etc. are prevented from entering the convex portions 41, 44. .

  In the case of FIG. 6, the permanent magnets 101 and 102 are attached to the mouthpiece 40. However, the present invention is not limited to this, and the permanent magnets 101 and 102 may be directly attached to the teeth 3a. However, in this case, as shown in FIG. 6B, a force opposite to the force Fs acts on the action point P2 ′ on the surface of the tooth 3a located at the north pole of the permanent magnet 101, and the permanent magnet 102 A force diametrically opposite to the force Fn is applied to the action point P1 ′ on the back surface of the tooth 3a located at the S pole, and by these forces, the tooth 3a is given a counterclockwise torque when viewed from above.

  However, since the force acting on the action points P1 ′ and P2 ′ is a force directed toward the outside of the tooth 3a, when the permanent magnets 101 and 102 are attached to the mouthpiece 40 as shown in FIG. 6, the action point P1 ′. , P2 ′ does not act directly on the teeth 3a. Therefore, it is preferable that the permanent magnets 101 and 102 are attached to the mouthpiece 40.

  FIG. 9 is a view showing the tooth 3a when two permanent magnets 101 and 102 are attached to the tooth 3a to be corrected, (a) is a left side view of the tooth 3a, b) shows a sectional view from the upper surface of the tooth 3a, and (c) shows a front view of the tooth 3a. Since the xz direction shown in FIG. 9 is the same as the direction shown in FIG. 3, description is abbreviate | omitted. In the case of FIG. 9, as shown in (a), the tooth 3a is rotated counterclockwise by applying a counterclockwise torque in the left side view, and the direction of the current tooth 3a indicated by the solid line is counterclockwise by a predetermined angle. The tooth 3a is moved in the direction indicated by the dotted line rotated in FIG. In FIG. 9, the permanent magnets 101 and 102 apply torque to the teeth 3 a via the mouthpiece 40.

  For that purpose, as shown in FIG. 9A, the permanent magnet 101 is attached so that the magnetic moment M is directed from the lower side to the upper side at the lower end side of the surface of the tooth 3a, and at the upper end side of the back surface of the tooth 3a. The permanent magnet 102 is attached so that the magnetic moment M is directed from the lower side to the upper side. And as shown to (a), the magnetic field H is provided to the direction (-y direction) from the back surface side of the tooth | gear 3a to the surface side. Thereby, as shown in (a), the tooth 3a is given a force Fn from the back surface of the tooth 3a to the front surface direction (-y direction) at the back surface acting point P1 where the N pole of the permanent magnet 102 is located. A force Fs is applied from the front surface to the back surface (+ y direction) at the front surface acting point P2 located at the south pole of the permanent magnet 101, and a counterclockwise torque is applied to the teeth 3a in the left side view. . As a result, the tooth 3a is induced to rotate counterclockwise in the left side view, and finally the direction of the tooth 3a is moved from the direction indicated by the solid line to the direction indicated by the dotted line, and the twist of the tooth 3a is corrected. The

  In FIG. 9, the permanent magnets 101 and 102 are attached to the mouthpiece 40. However, the present invention is not limited to this, and the permanent magnets 101 and 102 may be directly attached to the teeth 3a. However, in this case, a force opposite to the force Fs acts on the action point P2 ′ on the surface of the tooth 3a located at the north pole of the permanent magnet 101, and the back surface of the tooth 3a located at the south pole of the permanent magnet 102 Although a force opposite to the force Fn is applied to the action point P1 ′, the tooth 3a is given a clockwise torque in the left side view by these forces.

  However, since the force acting on the action points P1 ′ and P2 ′ is a force toward the outside of the tooth 3a, when the permanent magnets 101 and 102 are attached to the mouthpiece 40 as shown in FIG. 9, the action point P1 ′. , P2 ′ does not act directly on the teeth 3a. Therefore, it is preferable that the permanent magnets 101 and 102 are attached to the mouthpiece 40.

  As described above, according to the orthodontic apparatus 1 according to the present embodiment, torque can be applied to the teeth 3a to be corrected, and the twist of the teeth 3a can be restored. Further, since the torque is applied to the teeth 3a by the permanent magnet, the permanent magnet can be driven by the magnetic field, and the torque is applied to the teeth 3a without attaching an electric wiring or the like to the permanent magnet. can do.

  In addition, in FIGS. 3-5, although the permanent magnet 10 is directly affixed with respect to the tooth | gear 3a, it is not limited to this, You may attach to the mouthpiece 40. FIG.

  Moreover, in the said embodiment, although the electric current production | generation part 30 produced | generated the direct current, it is not limited to this, You may produce | generate an alternating current. In this case, the permanent magnet receives an AC magnetic field, and the direction of the applied torque changes with time, making it difficult to apply torque in a certain direction to the teeth 3a. Therefore, the current generator 30 may generate an alternating current so that the torque is not directed in the direction opposite to the direction to be corrected with respect to the tooth 3a. Specifically, when the torque goes in the direction opposite to the direction to be corrected, the amplitude of the alternating current is set to 0 so that no torque is applied. When the torque goes in the direction to be corrected, the amplitude of the alternating current is set to a predetermined level. It is preferable to generate an alternating current that provides a constant, that is, periodically repeats on and off. When such AC mechanical stimulation is applied to the tooth 3a, bone remodeling activity is activated, tooth movement is accelerated, and the correction period can be shortened. In addition, regarding the acceleration of tooth movement when AC mechanical stimulation is applied to teeth, "Shimizu: Japanese Journal of Dentistry 45: 56-72, 1986", "Omae et al .: Journal of Orthodontic Society of Japan , 60 (4): 201, 2001 ".

  6 and 9, a mouthpiece covering the entire dental row 3 is illustrated as the mouthpiece 40. However, the mouthpiece is not limited to this, and a part of the dental row 3 is included so as to include teeth to be corrected. It may be of a size that covers, or a size that covers only the teeth 3a to be corrected.

  In the above embodiment, there is one tooth to be corrected, but this is only an example, and a plurality of teeth may be used as correction target teeth.

  Moreover, in the said embodiment, although the case where the permanent magnet was attached to the surface and / or back surface of the tooth | gear 3a was illustrated, it is not limited to this, You may attach a permanent magnet to the side surface of the tooth | gear 3a. In this case as well, as in the case of the above embodiment, the permanent magnet mounting direction and the magnetic field direction may be determined so that torque is applied in the direction to be corrected.

1 shows an overall configuration diagram of an orthodontic apparatus 1 according to an embodiment of the present invention. 3 is a block diagram showing a detailed configuration of a current generator 30. FIG. It is the figure which showed the tooth | gear 3a when attaching the permanent magnet 10 with respect to the tooth | gear 3a used as correction | amendment so that a longitudinal direction may turn to the left-right direction by front view, (a) is the left view of the tooth | gear 3a. (B) shows a cross-sectional view from the upper surface of the tooth 3a, and (c) shows a front view of the tooth 3a. It is the figure which showed the tooth | gear 3a when attaching the permanent magnet 10 so that a longitudinal direction may become an up-down direction by front view with respect to the tooth | gear 3a used as correction | amendment object, (a) is the left view of the tooth | gear 3a. (B) shows a cross-sectional view from the upper surface of the tooth 3a, and (c) shows a front view of the tooth 3a. It is the figure which showed the tooth | gear 3a when attaching the permanent magnet 10 so that a longitudinal direction may face an up-down direction by front view with respect to the tooth | gear 3a used as correction | amendment object, (a) is the left view of the tooth | gear 3a. (B) shows a cross-sectional view from the upper surface of the tooth 3a, and (c) shows a front view of the tooth 3a. It is the figure which showed the tooth | gear 3a when two permanent magnets 10 are attached with respect to the tooth | gear 3a used as correction | amendment object, (a) shows the left view of the tooth | gear 3a, (b) shows the tooth | gear 3a. Sectional drawing is shown from the upper surface, (c) has shown the front view of the tooth | gear 3a. The disassembled perspective view when the mouthpiece 40 to which the permanent magnets 101 and 102 are attached is viewed from the front side is shown. The disassembled perspective view when the mouthpiece 40 is seen from the back side is shown. It is the figure which showed the tooth | gear 3a when two permanent magnets 101 and 102 are attached with respect to the tooth | gear 3a used as correction object, (a) shows the left view of the tooth | gear 3a, (b) is tooth | gear. Sectional drawing is shown from the upper surface of 3a, (c) has shown the front view of the tooth | gear 3a.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Orthodontic apparatus 3a Teeth 3 Teeth 10 Permanent magnet 20 Coil 21 Electric wire 22 Bobbin 30 Current generation part 31 Control apparatus 32 Converter 33 Amplifier 40 Mouthpiece 41,44 Convex part 42 Outer mouthpiece 43 Inner mouthpiece 101,102 Permanent magnet

Claims (5)

Torque applying means for applying mechanical stimulation to a plurality of points of the correction target tooth and applying torque for correcting the correction target tooth to the correction target tooth;
An orthodontic apparatus comprising: drive means for driving the torque applying means so that the torque applying means applies torque to the teeth. The torque applying means is made of a magnetic material,
The orthodontic apparatus according to claim 1, wherein the driving unit applies a magnetic field to the magnetic body to drive the torque applying unit.   The orthodontic apparatus according to claim 1 or 2, wherein the torque applying means is attached to a mouthpiece attached to one or a plurality of teeth including the teeth to be corrected. The plurality of action points are a first action point that exists on one surface of the tooth to be corrected, and a second surface that is present on the one surface and different from the first action point. Including the point of action,
The orthodontic apparatus according to any one of claims 1 to 3, wherein the torque applying means applies a force in a reverse direction to the first action point and the second action point. . The plurality of action points include a first action point existing on one surface of the tooth to be corrected, and a second action point existing on a surface opposite to the one surface,
The orthodontic apparatus according to any one of claims 1 to 3, wherein the torque applying means applies a force in a reverse direction to the first action point and the second action point. .

Images