Dental sets for molar intrusion and open bite treatment

Abstract

To provide a dental set for open bite treatment, which can easily depress molars in a short period of time without causing extrusion of front teeth when it is necessary to depress molars in open bite treatment, thereby enabling open bite treatment. [Solution] The dental set for open bite treatment has a plurality of brackets (201) attached to the patient's maxillary or mandibular teeth, an orthodontic wire (11) attached to these brackets, and an intermaxillary elastic (400). When indenting a patient's maxillary molars, the intermaxillary elastic is stretched by attaching the orthodontic wire to the bracket attached to the crown of the maxillary canine from above and stretching it, then hooking it from below to the bracket attached to the crown of the mandibular canine, and further hooking it onto a bondable tube (202) attached to the crown of the mandibular first molar. The same applies when indenting a patient's mandibular molars.

Description

[Technical Field]

[0001] The present invention relates to a dental set for molar intrusion and a dental set for open bite treatment, which is suitable for use by dentists when intruding a patient's molars or treating an open bite by intruding a patient's molars. [Background technology]

[0002] An open bite is a type of abnormality in the vertical occlusion of the upper and lower dental arches, in which several teeth are in the lower position, leaving a gap between the upper and lower teeth during centric occlusion. This condition can occur in both the anterior and posterior teeth. An open bite is one of the malocclusions that is difficult to treat with orthodontic treatment.

[0003] When an open bite is treatable by correcting the inclination of the teeth, it is common to use a multi-bracket appliance. Alternatively, an open bite can be treated with a mouthpiece-type orthodontic appliance. Furthermore, when the open bite is skeletal, it can also be treated by performing mandibular surgery.

[0004] Conventionally, known devices used in the treatment of open bite include an orthodontic device (Patent Document 1), an orthodontic appliance (Patent Document 2), an orthodontic appliance (Patent Document 3), and an adhesive pad (Patent Document 4). The orthodontic device described in Patent Document 1 is comprised of a base that is U-shaped in plan view and is sandwiched between the teeth of the upper and lower jaws, an expanding peripheral wall that protrudes upward and downward from the outer periphery of the base and abuts the upper lip, lower lip, and cheek from the inside, and an alignment peripheral wall that protrudes upward and downward from the inner periphery of the base and abuts the teeth of the upper and lower jaws from the inside, and is characterized in that the inner periphery of the expanding peripheral wall and the outer periphery of the alignment peripheral wall are spaced apart by a distance greater than the thickness of the teeth of the upper and lower jaws (paragraph 0024 states that the orthodontic device can be suitably used for correcting an open bite). The orthodontic appliance described in Patent Document 2 includes an anchor structure including a left posterior tooth cap and a right posterior tooth cap configured to be removably attached to the left posterior teeth and the right posterior teeth of the maxillary dental arch of a patient, respectively, a palatal bar connecting the left posterior tooth cap and the right posterior tooth cap and configured to contact the palate of the patient, and an extension arch connected to the left posterior tooth cap and the right posterior tooth cap and extending from the left posterior tooth cap to the right posterior tooth cap; and a left anterior tooth portion and a right anterior tooth portion configured to be removably attached to the left anterior teeth and the right anterior teeth of the maxillary dental arch of the patient, respectively. a maxillary expansion structure including a tooth portion and a plurality of expansion screws connecting the left anterior tooth portion and the right anterior tooth portion to each other and to the palatal bar, wherein the left posterior tooth cap and the right posterior tooth cap, the palatal bar, and an expansion arch laterally surround the maxillary expansion structure; and at least one protrusion formed on the occlusal side of the expansion arch and configured to contact the patient's mandibular dental arch when the orthodontic device is worn (paragraphs 0004 to 0006 describe non-surgical treatment of malocclusions such as anterior open bites).The orthodontic appliance described in Patent Document 3 is sandwiched between the upper teeth of the maxilla and the lower teeth of the mandible and includes a base portion formed in a U-shape in plan view, an outer peripheral wall provided on the outer peripheral edge of the base portion and protruding in the vertical direction, and an inner peripheral wall provided on the inner peripheral edge of the base portion and protruding in the vertical direction and formed in a U-shape in plan view, the inner peripheral wall including an inner upper wall provided above the base portion and an inner lower wall provided below the base portion, and the inner upper wall includes an inner upper front portion formed between both corners of the U-shape and inner peripheral lower walls formed on the left and right canine sides of both corners of the U-shape, and an upper side portion, the peripheral wall comprising an upper peripheral wall provided above the base portion and a lower peripheral wall provided below the base portion, the upper peripheral wall having an upper peripheral front portion facing the incisors of the upper dentition and an upper peripheral side portion facing the canines and molars of the upper dentition, the upper edge of the upper peripheral front portion extending above the upper edge of the upper peripheral side portion, and the upper peripheral front portion having a plurality of parallel markings formed at regular intervals in the vertical direction (paragraph 0027 describes correcting malocclusions such as open bites with orthodontic appliances).Patent document 4 describes an adhesive pad for muscle function training, comprising cellulose and one or more hydrocolloids selected from the group consisting of starch, polysaccharides, gelatin, and gum (paragraph 0072 describes assisting in the treatment of open bite malocclusion through muscle function training using an adhesive pad).

[0005] The present inventor previously An orthodontic set comprising an orthodontic wire and a bracket for attaching the orthodontic wire, The orthodontic wire is The wire is made of a stainless steel wire having an arch-shaped cross section of a rectangle of (0.41±0.05mm) x (0.56±0.05mm) and a similar cross section to the cross section of this stainless steel wire with a similarity ratio of 1:p (where 0.9≦p≦1.1) and mechanical properties equivalent to those of this stainless steel wire. the first portion and the fifth portion lie substantially in a first plane; the second portion and the fourth portion lie substantially in a second plane; the third portion lies substantially in a third plane; the long sides of the rectangular cross section of the stainless steel wire or the wire made of a material other than stainless steel are substantially parallel to the first plane, the second plane, and the third plane; the first plane is inclined at an angle of 12° to 25° relative to the second plane, the third plane is inclined relative to the second plane by 12° to 25° toward the same side as the first plane, the first and fifth portions have a length sufficient to span approximately the left or right first molar of the patient's maxilla or mandible; the second and fourth portions have a length sufficient to span approximately the first and second premolars on the left or right side of the patient's maxilla or mandible; the third portion has a length sufficient to span substantially all of the patient's upper or lower anterior teeth; The above bracket is A slot having a rectangular cross-sectional shape with a width of 0.56±0.05 mm or a slot having a rectangular cross-sectional shape with a width of (0.56±0.05 mm)×p (See Patent Document 5.) This orthodontic set, when used in orthodontic treatment, enables three-dimensional tooth movement, and it has been demonstrated in numerous cases that it can almost completely prevent root resorption and causes almost no damage to tissues. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-23672 [Patent Document 2] Patent No. 7486133 [Patent Document 3] Patent No. 7020727 [Patent Document 4] Special Publication No. 2022-513206 [Patent Document 5] Patent No. 5566549 Summary of the Invention [Problem to be solved by the invention]

[0007] However, it is unclear whether the orthodontic appliances, orthodontic devices, orthodontic appliances and adhesive pads described in the above-mentioned Patent Documents 1 to 4 are effective in treating open bites.

[0008] Therefore, the problem that this invention aims to solve is to provide a dental set for molar repression that can repress molars easily and in a short period of time without causing extrusion of the front teeth when it is necessary to repress molars for open bite treatment or other purposes.

[0009] Another problem that this invention aims to solve is to provide a dental set for open bite treatment that can easily and quickly depress molars when it is necessary to do so in open bite treatment without causing extrusion of the front teeth, thereby enabling open bite treatment. [Means for solving the problem]

[0010] The inventors have conducted intensive research over many years to find an effective method for treating open bites. As a result, they have discovered that by combining the orthodontic set described in Patent Document 5 with an intermaxillary rubber band (rubber band), and then performing treatment by attaching orthodontic wires to the upper and lower jaw teeth with brackets and then stretching the intermaxillary rubber band between the upper and lower jaw teeth in a special stretching method, it is possible to press down the molars easily and in a short period of time without causing the front teeth to protrude, thereby making it possible to treat open bites, which led to the invention of this invention.

[0011] That is, in order to solve the above problems, the present invention provides: Orthodontic wires, A bracket having a slot with a rectangular cross-sectional shape having a width of 0.56±0.05 mm or a slot with a rectangular cross-sectional shape having a width of (0.56±0.05 mm)×p (where 0.9≦p≦1.1); Intermaxillary rubber bands and and The orthodontic wire is The wire is made of an arch-shaped stainless steel wire having a rectangular cross-sectional shape of (0.41±0.05 mm) x (0.56±0.05 mm) and a first substantially linear section, a second substantially linear section, a central arch-shaped third section, a fourth substantially linear section, and a fifth substantially linear section from one end to the other, or a wire made of a material other than stainless steel having a cross-sectional shape similar to that of the stainless steel wire at a similarity ratio of 1:p and having mechanical properties equivalent to those of the stainless steel wire, the first portion and the fifth portion lie substantially in a first plane; the second portion and the fourth portion lie substantially in a second plane; the third portion lies substantially in a third plane; the long sides of the rectangular cross section of the stainless steel wire or the wire made of a material other than stainless steel are substantially parallel to the first plane, the second plane, and the third plane; the first plane is inclined at an angle of 12° to 25° relative to the second plane, the third plane is inclined relative to the second plane by 12° to 25° toward the same side as the first plane, the first and fifth portions have a length sufficient to span approximately the left or right first molar of the patient's maxilla or mandible; the second and fourth portions have a length sufficient to span approximately the first and second premolars on the left or right side of the patient's maxilla or mandible; the third portion has a length sufficient to span substantially all of the patient's upper or lower anterior teeth; The intermaxillary rubber bands are When depressing the maxillary molars of a patient, the orthodontic wire is attached to the bracket attached to the front of the crown of the maxillary tooth, and while being stretched, it is hooked from above onto the bracket attached to the front of the crown of the maxillary canine, and then hooked from below onto the bracket attached to the front of the crown of the mandibular canine, and further hooked onto a bondable tube attached to the front of the crown of the maxillary first molar, and stretched across; When depressing a patient's mandibular molars, the orthodontic wire is attached to the bracket attached to the front of the crown of the mandibular tooth, and then the wire is hooked from below onto the bracket attached to the front of the crown of the mandibular canine and stretched, while being hooked from above onto the bracket attached to the front of the crown of the maxillary canine, and further hooked onto a bondable tube attached to the front of the crown of the mandibular first molar, thereby stretching the wire across.

[0012] As described in Patent Document 5, the above-mentioned orthodontic wire is suitable for use in orthodontic treatment after extraction of a first premolar. However, molar intrusion or the associated open bite treatment can be effectively performed with or without extraction of the first premolar. The method for using the above-mentioned orthodontic wire when performing orthodontic treatment after extraction of a first premolar is as follows: When performing orthodontic treatment on a patient's maxillary teeth, the left and right first premolars are extracted first, and the first, third, and fifth portions are placed above the second and fourth portions. The first portion is attached to the anterior surface of the crown of the left first molar, the second portion is attached to the anterior surface of the crown of the left second premolar, the third portion is attached to the anterior surface of the crown of the left and right central incisors, lateral incisors, and canines, the fourth portion is attached to the anterior surface of the crown of the right second premolar, and the fifth portion is attached to the anterior surface of the crown of the right first molar. When performing orthodontic treatment on a patient's mandibular teeth, the left and right first premolars are extracted first, and then the first, third, and fifth parts are positioned lower than the second and fourth parts, with the first part attached to the front surface of the crown of the right first molar, the second part attached to the front surface of the crown of the right second premolar, the third part attached to the front surfaces of the crowns of the left and right central incisors, lateral incisors, and canines, the fourth part attached to the front surface of the crown of the left second premolar, and the fifth part attached to the front surface of the crown of the left first molar. This orthodontic wire can also be used, as needed, for example, when performing orthodontic treatment by extracting the left first premolar and the right second premolar, or vice versa, and is particularly suitable for use when moving the front teeth backward (lowering them backward).Specifically, when orthodontic treatment is performed on a patient's maxillary teeth, for example, the first premolar on the left side and the second premolar on the right side are extracted in advance, and the first, third, and fifth parts are placed above the second and fourth parts. The first part is attached to the front surface of the crown of the left first molar, the second part is attached to the front surface of the crown of the left second premolar, the third part is attached to the front surfaces of the crowns of the left and right central incisors, lateral incisors, and canines, the fourth part is attached to the front surface of the crown of the right first premolar, and the fifth part is attached to the front surface of the crown of the right first molar. Alternatively, in a state where the left second premolar and the right first premolar have been extracted in advance, the orthodontic wire is placed with the first, third, and fifth parts above the second and fourth parts, with the first part attached to the front surface of the crown of the left first molar, the second part attached to the front surface of the crown of the left first premolar, the third part attached to the front surfaces of the crowns of the left and right central incisors, lateral incisors, and canines, the fourth part attached to the front surface of the crown of the right second premolar, and the fifth part attached to the front surface of the crown of the right first molar. Furthermore, when orthodontic treatment is performed on a patient's mandibular teeth, for example, the first premolar on the left side and the second premolar on the right side are extracted in advance, and then the first, third, and fifth parts are placed below the second and fourth parts. With this orthodontic wire, the first part is attached to the front surface of the crown of the right first molar, the second part is attached to the front surface of the crown of the right first premolar, the third part is attached to the front surfaces of the crowns of the left and right central incisors, lateral incisors, and canines, the fourth part is attached to the front surface of the crown of the left second premolar, and the fifth part is attached to the front surface of the crown of the left first molar.Alternatively, in a state where the left second premolar and the right first premolar have been extracted in advance, the orthodontic wire is attached to the front surface of the crown of the right first molar, the second part is attached to the front surface of the crown of the right second premolar, the third part is attached to the front surface of the crown of the left and right central incisors, lateral incisors and canines, the fourth part is attached to the front surface of the crown of the left first premolar, and the fifth part is attached to the front surface of the crown of the left first molar, with the first part, third part and fifth part placed below the second part and fourth part.

[0013] When a stainless steel wire is used for orthodontic wires, the dimensions of its rectangular cross section are selected as needed within the range of (0.41±0.05mm) x (0.56±0.05mm). If the stainless steel wire has a rectangular cross section within the range of (0.41±0.05mm) x (0.56±0.05mm), it is possible to obtain the same effect as when a stainless steel wire with a rectangular cross section of 0.41mm x 0.56mm is used by adjusting the inclination angle of the first plane relative to the second plane and the inclination angle of the third plane relative to the second plane as needed. Furthermore, orthodontic wires made of materials other than stainless steel may be used as long as they have mechanical properties (Young's modulus, torsional rigidity, etc.) equivalent to those of stainless steel wire, and in such cases, the wire should have a cross-sectional shape similar to that of a stainless steel wire having a rectangular cross-sectional shape of (0.41±0.05 mm) × (0.56±0.05 mm) with a similarity ratio of 1:p (where 0.9≦p≦1.1), depending on the wire material. In this way, even when a wire made of a material other than stainless steel is used, it is possible to obtain the same effects as when a stainless steel wire with a rectangular cross-sectional dimension of 0.41 mm × 0.56 mm is used by adjusting the inclination angle of the first plane relative to the second plane and the inclination angle of the third plane relative to the second plane as necessary. Preferably, a stainless steel wire having a rectangular cross-section of (0.41±0.02 mm) x (0.56±0.02 mm) or a wire made of a material other than stainless steel having a cross-sectional shape similar to that of the stainless steel wire with a similarity ratio of 1:p (where 0.9≦p≦1.1) is used, and the most typical example is a stainless steel wire having a rectangular cross-sectional shape of 0.41 mm x 0.56 mm (0.016" x 0.022") The use of such a thin stainless steel wire or a wire made of a material other than stainless steel allows an appropriate orthodontic force that is not too strong to be applied to the teeth, thereby effectively preventing root resorption.Specifically, for example, when this orthodontic wire is attached, a force of 100±30 gf is applied perpendicular to the third plane to both central incisors of the patient's maxillary or mandibular teeth, a force of 200±50 gf is applied to both lateral incisors, and a force of 250±50 gf is applied to both canines.

[0014] This orthodontic wire is typically manufactured by bending a single stainless steel wire or a wire made of a material other than stainless steel at four locations. That is, by bending a single stainless steel wire or a wire made of a material other than stainless steel at four locations, a first section, a second section, a third section, a fourth section, and a fifth section are formed. In this orthodontic wire, the bends at the boundaries between the first and second sections and the bends at the boundaries between the fifth and fourth sections are intended to tip the left and right first molars distally, i.e., to tip back, and prevent them from tipping mesially. These bends are hereinafter referred to as tip-back bends. Furthermore, the bent portions at the boundaries between the second and third portions and the fourth and third portions are intended to apply a rotational torque to the anterior teeth that tilts them labiolingually when the orthodontic wire is attached to the maxillary or mandibular teeth using brackets, and to hold the torque when the orthodontic wire is locked in the slots of the brackets attached to the anterior teeth, as described below. These bent portions are hereinafter referred to as torque holding bends. The inclination angles of the first plane relative to the second plane and the third plane relative to the second plane are selected from the range of 12° to 25° depending on the material of the wire used and the dimensions of the rectangular cross section, but are preferably 12° to 23°, typically 15° to 22°, e.g., 20°.

[0015] Typically, this orthodontic wire is approximately symmetrical with respect to a plane that bisects the third portion and is perpendicular to the second plane. Furthermore, when this orthodontic wire is attached to a bracket attached to the front of the crown of a patient's maxillary or mandibular anterior teeth, one longitudinal edge of the orthodontic wire makes point or line contact with the bottom surface of the bracket slot, and the edges on either side of this edge make point or line contact with both sides of the bracket slot. This allows the frictional force acting between the orthodontic wire and the bracket to be extremely small, thereby enabling tooth movement with a small orthodontic force and significantly reducing the strain on the patient's teeth. The cross-sectional shape of the bracket slot is generally approximately rectangular.

[0016] The strength of the intermaxillary rubber (also called elastic rubber) in this dental set for molar depression is determined by hooking the intermaxillary rubber from above onto the bracket attached to the front of the crown of the maxillary canine and stretching it, then hooking it from below onto the bracket attached to the front of the crown of the mandibular canine, and then hooking it onto the bondable tube attached to the front of the crown of the maxillary first molar. Alternatively, the strength of the intermaxillary rubber is determined by hooking the intermaxillary rubber from below onto the bracket attached to the front of the crown of the mandibular canine and stretching it, then hooking it onto the bondable tube attached to the front of the crown of the maxillary first molar. The tension generated when the intermaxillary rubber band is hooked from above onto the racket and then onto a bondable tube attached to the front of the crown of the mandibular first molar is selected so that the tension does not place excessive strain on the patient and allows for gradual indentation of the molar. The tension is selected appropriately depending on the patient's dental condition, but is generally between 65g and 100g, typically between 65g and 90g or between 70g and 80g, and twice that tension is applied to the bracket. The material of this intermaxillary rubber band is selected as needed and is not particularly limited, but examples include natural rubber (latex, etc.) and synthetic rubber.

[0017] The present invention also provides: A dental set for open bite treatment used when it is necessary to depress upper or lower molars when treating a patient's open bite, Orthodontic wires, A bracket having a slot with a rectangular cross-sectional shape having a width of 0.56±0.05 mm or a slot with a rectangular cross-sectional shape having a width of (0.56±0.05 mm)×p (where 0.9≦p≦1.1); Intermaxillary rubber bands and and The orthodontic wire is The wire is made of an arch-shaped stainless steel wire having a rectangular cross-sectional shape of (0.41±0.05 mm) x (0.56±0.05 mm) and a first substantially linear section, a second substantially linear section, a central arch-shaped third section, a fourth substantially linear section, and a fifth substantially linear section from one end to the other, or a wire made of a material other than stainless steel having a cross-sectional shape similar to that of the stainless steel wire at a similarity ratio of 1:p and having mechanical properties equivalent to those of the stainless steel wire, the first portion and the fifth portion lie substantially in a first plane; the second portion and the fourth portion lie substantially in a second plane; the third portion lies substantially in a third plane; the long sides of the rectangular cross section of the stainless steel wire or the wire made of a material other than stainless steel are substantially parallel to the first plane, the second plane, and the third plane; the first plane is inclined at an angle of 12° to 25° relative to the second plane, the third plane is inclined relative to the second plane by 12° to 25° toward the same side as the first plane, the first and fifth portions have a length sufficient to span approximately the left or right first molar of the patient's maxilla or mandible; the second and fourth portions have a length sufficient to span approximately the first and second premolars on the left or right side of the patient's maxilla or mandible; the third portion has a length sufficient to span substantially all of the patient's upper or lower anterior teeth; The intermaxillary rubber bands are When depressing the maxillary molars of a patient, the orthodontic wire is attached to the bracket attached to the front of the crown of the maxillary tooth, and while being stretched, it is hooked from above onto the bracket attached to the front of the crown of the maxillary canine, and then hooked from below onto the bracket attached to the front of the crown of the mandibular canine, and further hooked onto a bondable tube attached to the front of the crown of the maxillary first molar, and stretched across; When depressing a patient's lower molars, the orthodontic wire is attached to the bracket attached to the front of the crown of the lower tooth, and then the wire is hooked from below onto the bracket attached to the front of the crown of the lower canine tooth and stretched, while being hooked from above onto the bracket attached to the front of the crown of the upper canine tooth, and further hooked onto a bondable tube attached to the front of the crown of the lower first molar, thereby stretching the wire.This is a dental set for open bite treatment.

[0018] In the invention of this dental set for open bite treatment, the same as what has been explained in relation to the invention of the dental set for molar depression applies, unless it is contrary to the nature of the invention. [Effects of the Invention]

[0019] According to this invention, by using a combination of special orthodontic wires, brackets, and intermaxillary rubber, when it is necessary to depress molars for open bite treatment or other purposes, the molars can be depressed easily and in a short period of time without causing the front teeth to protrude, allowing open bite treatment to be performed safely and in a short period of time. [Brief explanation of the drawings]

[0020] [Figure 1] 1A and 1B are a plan view, a right side view, a left side view, a front view, and an enlarged cross-sectional view showing an orthodontic wire constituting a dental set for open bite treatment according to one embodiment of the present invention. [Figure 2]FIG. 1 is a plan view showing an orthodontic wire that constitutes a dental set for open bite treatment according to one embodiment of the present invention attached to upper and lower jaw teeth by brackets. [Figure 3] 1 is a schematic diagram showing an orthodontic wire constituting a dental set for open bite treatment according to an embodiment of the present invention attached to upper and lower jaw teeth by brackets.

[0023] FIG. [Figure 4] FIG. 1 is a perspective view showing an example of a bracket and a bondable tube used for maxillary teeth. [Figure 5] FIG. 1 is a perspective view showing a state in which an orthodontic wire is attached to upper teeth by brackets. [Figure 6] FIG. 1 is a perspective view showing a state in which an orthodontic wire is attached to a lower jaw tooth by a bracket. [Figure 7] 1 is a development view showing an orthodontic wire attached by brackets attached to maxillary teeth, and cross-sectional views of various parts of the orthodontic wire. FIG. [Figure 8] 7B is a schematic diagram showing an enlarged view of the orthodontic wire shown in FIG. 7A from the maxillary right first premolar to the maxillary right canine. FIG. [Figure 9] FIG. 1 is a plan view of an orthodontic wire attached to brackets attached to maxillary teeth. [Figure 10] FIG. 1 is a cross-sectional view showing a bracket attached to a maxillary right central incisor and an orthodontic wire threaded through a slot in the bracket. [Figure 11] FIG. 1 is a cross-sectional view showing a bracket attached to a maxillary right lateral incisor and an orthodontic wire threaded through a slot in the bracket. [Figure 12] FIG. 1 is a cross-sectional view showing a bracket attached to a maxillary right canine tooth and an orthodontic wire threaded through the slot of the bracket. [Figure 13] FIG. 1 is a cross-sectional view showing a bracket attached to a maxillary right first premolar and an orthodontic wire threaded through a slot in the bracket. [Figure 14]1 is a schematic diagram illustrating tooth movement made possible by an orthodontic wire constituting a dental set for open bite treatment according to an embodiment of the present invention. FIG. [Figure 15] 1 is a schematic diagram showing a specific example of a method of using an orthodontic wire that constitutes a dental set for open bite treatment according to one embodiment of the present invention. FIG. [Figure 16] 1 is a schematic diagram showing an intermaxillary rubber band constituting a dental set for open bite treatment according to an embodiment of the present invention. FIG. [Figure 17] 1 is a front view showing an example of an open bite of a patient undergoing open bite treatment using a dental set for open bite treatment according to an embodiment of the present invention. FIG. [Figure 18] FIG. 18 is a front view showing a state in which orthodontic wires are attached to brackets attached to the maxillary and mandibular teeth in the open bite state shown in FIG. 17. [Figure 19] This is a front view showing the state in which the intermaxillary rubber in Figure 18 is stretched by being hooked from above onto a bracket attached to the front of the crown of the maxillary canine, and then hooked from below onto a bracket attached to the front of the crown of the mandibular canine, and further hooked onto a bondable tube attached to the front of the crown of the maxillary first molar, thereby stretching the rubber across. [Figure 20] This is a front view showing the state in Figure 18 where the intermaxillary rubber is hooked from below onto the bracket attached to the front surface of the crown of the mandibular canine and stretched, while being hooked from above onto the bracket attached to the front surface of the crown of the maxillary canine, and further hooked onto the bondable tube attached to the front surface of the crown of the mandibular first molar, thereby stretching the rubber across. [Figure 21] FIG. 20 is a schematic diagram for explaining the mechanism by which maxillary molar intrusion occurs with an intermaxillary rubber band stretched across the maxillary cavity as shown in FIG. 19. [Figure 22] FIG. 20 is a schematic diagram for explaining the mechanism by which maxillary molar intrusion occurs with an intermaxillary rubber band stretched across the maxillary cavity as shown in FIG. 19. [Figure 23] FIG. 20 is a schematic diagram showing a state in which indentation of a maxillary molar occurs with an intermaxillary rubber band stretched across the maxillary cavity as shown in FIG. 19. [Figure 24]1 is a photograph in lieu of a drawing showing the state when open bite treatment of a patient 1 is started by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 25] This is a photograph, used as a substitute for a drawing, showing the condition of patient 1 approximately six months after starting open bite treatment by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 26] This is a photograph in place of a drawing showing the state of patient 1 when open bite treatment was started by depressing the mandibular molars using a dental set for open bite treatment according to one embodiment of the present invention, approximately two months after the state shown in Figure 25. [Figure 27] This is a photograph, used as a substitute for a drawing, showing the condition of patient 1 approximately one year after starting open bite treatment by depressing the mandibular molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 28] 10 is a photograph in lieu of a drawing showing the state when open bite treatment of patient 2 is started by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 29] This is a photograph, used as a substitute for a drawing, showing the condition of patient 2 approximately six months after starting open bite treatment by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 30] This is a photograph in place of a drawing showing the state of patient 2 when open bite treatment was started by depressing the mandibular molars using a dental set for open bite treatment according to one embodiment of the present invention, approximately nine months after the state shown in Figure 28. [Figure 31] This is a photograph, used as a substitute for a drawing, showing the condition of patient 2 approximately one year after starting open bite treatment by depressing the mandibular molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 32] 10 is a photograph in lieu of a drawing showing the state when open bite treatment of patient 3 is started by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 33]This is a photograph, used as a substitute for a drawing, showing the condition of patient 3 approximately five months after starting open bite treatment by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 34] This is a photograph, used as a substitute for a drawing, showing the condition of patient 3 approximately six months after starting open bite treatment by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 35] This is a photograph in place of a drawing showing the state of patient 3 when open bite treatment was started by depressing the mandibular molars using a dental set for open bite treatment according to one embodiment of the present invention, approximately five months after the state shown in Figure 34. [Figure 36] This is a photograph, used as a substitute for a drawing, showing the condition of patient 3 approximately four months after starting open bite treatment by depressing the mandibular molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 37] This is a photograph, used as a substitute for a drawing, showing the condition of patient 3 approximately five months after starting open bite treatment by again depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 38] This is a photograph, used as a substitute for a drawing, showing the condition of patient 3 approximately 10 months after starting open bite treatment by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 39] 10 is a photograph in lieu of a drawing showing the state when open bite treatment of patient 4 is started by depressing the mandibular molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 40] This is a photograph, used as a substitute for a drawing, showing the condition of patient 4 approximately four months after starting open bite treatment by depressing the mandibular molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 41] This is a photograph, used as a substitute for a drawing, showing the condition of patient 4 approximately 10 months after starting open bite treatment by depressing the mandibular molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 42]10 is a photograph in place of a drawing showing the state when open bite treatment of a patient 5 is started by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 43] This is a photograph, used as a substitute for a drawing, showing the condition of patient 5 approximately 10 months after starting open bite treatment by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. [Figure 44] This is a photograph, used as a substitute for a drawing, showing the condition of patient 5 approximately 11 months after starting open bite treatment by depressing the maxillary molars using a dental set for open bite treatment according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, modes for carrying out the invention (hereinafter referred to as "embodiments") will be described.

[0022] <One embodiment> [Open bite treatment dental set] The dental set for open bite treatment according to this embodiment includes the orthodontic wire described in Patent Document 5, brackets for attaching the orthodontic wire to the upper or lower jaw teeth, and intermaxillary elastics. The orthodontic wire, brackets, and intermaxillary elastics will be described below.

[0023] (orthodontic wire) 1A to 1D show an orthodontic wire 11. Here, Fig. 1A is a plan view, Fig. 1B is a right side view, Fig. 1C is a left side view, and Fig. 1D is a front view.

[0024] As shown in Figures 1A-1D, this orthodontic wire 11 is made of an arch-shaped metal wire having a rectangular cross-section, with a first substantially linear portion 11a, a second substantially linear portion 11b, a central arch-shaped third portion 11c, a fourth substantially linear portion 11d, and a fifth substantially linear portion 11e, from one end to the other. The metal wire has a rectangular cross-section with a short side length of a and a long side length of b (b > a). The cross-sectional shape of the first portion 11a shown in Figure 1A along line EE is shown in Figure 1E. Orthodontic wire 11 suitable for use when orthodontic treatment is performed after extraction of a first premolar is made of a stainless steel wire measuring a × b = (0.41 ± 0.05 mm) × (0.56 ± 0.05 mm), or a wire made of a metal other than stainless steel that has a cross-sectional shape similar to that of this stainless steel wire at a similarity ratio of 1:p (where 0.9 ≦ p ≦ 1.1) and has mechanical properties equivalent to that of this stainless steel wire. On the other hand, orthodontic wire 11 suitable for use when orthodontic treatment is performed after extraction of a second premolar is made of a stainless steel wire measuring a × b = (0.43 ± 0.05 mm) × (0.64 ± 0.05 mm), or a wire made of a metal other than stainless steel that has a cross-sectional shape similar to that of this stainless steel wire at a similarity ratio of 1:p (where 0.9 ≦ p ≦ 1.1) and has mechanical properties equivalent to that of this stainless steel wire. Here, the first portion 11a and the fifth portion 11e are located substantially in a first plane, the second portion 11b and the fourth portion 11d are located substantially in a second plane, and the third portion 11c is located substantially in a third plane. The long sides of the rectangular cross section of the metal wire are substantially parallel to the first, second, and third planes. In this case, the first plane on which the first portion 11a and the fifth portion 11e are located is inclined at an angle θ1 with respect to the second plane on which the second portion 11b and the fourth portion 11d are located. Furthermore, the third plane on which the third portion 11c is located is inclined at an angle θ2 with respect to the second plane on which the second portion 11b and the fourth portion 11d are located, toward the same side as the first plane on which the first portion 11a and the fifth portion 11e are located.In an orthodontic wire 11 suitable for use when orthodontic treatment is performed after extraction of a first premolar, θ1 and θ2 are 12° or more and 25° or less, typically 15° or more and 22° or less, for example, 20°. Typically, θ1 = θ2, but this is not limited thereto. On the other hand, in an orthodontic wire 11 suitable for use when orthodontic treatment is performed after extraction of a second premolar, θ1 is 7° or more and 20° or less, typically 10° or more and 17° or less, for example, 15°. Typically, θ1 = θ2, but this is not limited thereto. If necessary, θ1 on the left half and θ1 on the right half of the orthodontic wire 11 may be different from each other, and θ2 on the left half and θ2 on the right half may be different from each other. The first portion 11a has a length L1 sufficient to span the left or right first molar of the maxilla or mandible of a patient undergoing orthodontic treatment. The second portion 11b has a length L2 that allows it to be stretched across the first and second premolars on the left or right side. The third portion 11c has a length L3 that allows it to be stretched across all of the front teeth. The fourth portion 11d has a length L4 that allows it to be stretched across the first and second premolars on the left or right side. The fifth portion 11e has a length L5 that allows it to be stretched across the first molars on the left or right side. L1 to L5 are selected appropriately depending on the patient undergoing orthodontic treatment. Specifically, the length L1 of the first portion 11a and the length L5 of the fifth portion 11e are, for example, 5 mm to 18 mm, the length L2 of the second portion 11b and the length L4 of the fourth portion 11e are, for example, 7 mm to 20 mm, and the length L3 of the third portion 11c is, for example, 40 mm to 80 mm. The bent portion at the boundary between the first portion 11a and the second portion 11b is called a tip-back bend portion B. TB The bent portion at the boundary between the second portion 11b and the third portion 11c is a torque holding bend portion B. TH Similarly, the bent portion at the boundary between the fifth portion 11e and the fourth portion 11d is a tip-back bend portion B TB The bent portion at the boundary between the fourth portion 11d and the third portion 11c is a torque holding bend portion B. TH is.

[0025] The metal wire having a rectangular cross section that constitutes this orthodontic wire 11 is most typically a stainless steel wire having a rectangular cross section of a×b=0.016″×0.022″ (0.41 mm×0.56 mm), but is not limited to this.

[0026] [Manufacturing method for orthodontic wires] The method for manufacturing this orthodontic wire 11 is described in detail in Patent Document 5, so a detailed explanation will be omitted.

[0027] [How to use orthodontic wire 11] The following describes how to use the orthodontic wire 11 in orthodontic treatment. When using the orthodontic wire 11, it is first determined whether or not to extract teeth and which teeth to extract, and then the necessary extractions are performed. The orthodontic wire 11 is also used to level and align the maxillary and / or mandibular teeth to be treated with orthodontic treatment, correct the dental arch shape, and correct to some extent (approximately 80%) the rotation of teeth.

[0028] In this way, when the maxillary teeth and / or mandibular teeth are in an appropriate state to start orthodontic treatment using the orthodontic wire 11, orthodontic treatment is performed using the orthodontic wire 11. In this state, the crowns of the teeth are usually aligned to some extent, but the directions of the tooth axes are not aligned.

[0029] Figure 2A shows the maxillary teeth as viewed from above from inside the oral cavity, and Figure 2B shows the mandibular teeth as viewed from below from inside the oral cavity. In Figures 2A and 2B, symbols 1L and 1R represent the left and right central incisors, respectively, 2L and 2R represent the left and right lateral incisors, respectively, 3L and 3R represent the left and right canines, respectively, 4L and 4R represent the left and right first premolars, respectively, 5L and 5R represent the left and right second premolars, respectively, 6L and 6R represent the left and right first molars, respectively, 7L and 7R represent the left and right second molars, respectively, and 8L and 8R represent the left and right third molars, respectively. However, Figures 2A and 2B show the case where the teeth are aligned in a nearly ideal manner.

[0030] 2A, brackets 201 are bonded with dental adhesive to approximately the center of the front surface of the crowns of maxillary central incisors 1L and 1R, lateral incisors 2L and 2R, canines 3L and 3R, first premolars 4L and 4R, and second premolars 5L and 5R, respectively, and bondable tubes 202 are similarly bonded to approximately the center of the front surface of the crowns of first molars 6L and 6R. However, in practice, first premolars 4L and 4R or second premolars 5L and 5R are extracted. Then, the first part 11a, the third part 11c, and the fifth part 11e are placed above the second part 11b and the fourth part 11d of the orthodontic wire 11, and the first part 11a, the third part 11c, and the fifth part 11e are bent downward relative to the second part 11b and the fourth part 11d until they are nearly horizontal. Then, the second part 11b, the third part 11c, and the fourth part 11d of the orthodontic wire 11 are passed through the slots of these brackets 201, and the first part 11a and the fifth part 11e of the orthodontic wire 11 are passed through the bondable tube 202. The tips of the first part 11a and the fifth part 11e protruding rearward from the bondable tube 202 are bent to fix the first part 11a and the fifth part 11e to the bondable tube 202. As a result, the first part 11a is attached to the front surface of the crown of the left first molar 6L, the second part 11b is attached to the front surface of the crown of the left first premolar 4L and second premolar 5L (actually, one of the first premolar 4L and second premolar 5L), the third part 11c is attached to the front surface of the crown of the left and right central incisors 1L and 1R, lateral incisors 2L and 2R, and canines 3L and 3R, the fourth part 11d is attached to the front surface of the crown of the right first premolar 4R and second premolar 5R (actually, one of the first premolar 4R and second premolar 5R), and the fifth part 11e is attached to the front surface of the crown of the right first molar 6R.Thereafter, one end of a power chain (not shown), selected in consideration of the appropriate orthodontic force so as to apply an appropriate horizontal orthodontic force, is hooked and fixed to the hook (see FIG. 4F) of the bondable tube 202 attached to one of the first molars 6L and 6R, and while stretching the power chain, it is hooked to each bracket 201 attached to the maxillary anterior teeth, etc., and the other end of the power chain is hooked and fixed to the hook of the bondable tube 202 attached to the other first molar 6L and 6R. As shown in FIG. 2B, an orthodontic wire 11 is similarly attached to the mandibular teeth, and a power chain is hooked to it. Specifically, the appropriate horizontal orthodontic force is generally 100 to 200 g-force when using a stainless steel wire with a rectangular cross-section of 0.41 mm x 0.56 mm (0.016" x 0.022") to move the anterior teeth posteriorly (lower them), and generally 300 to 400 g-force when using a stainless steel wire with a rectangular cross-section of 0.43 mm x 0.64 mm (0.017" x 0.025") to move first molars 6L and 6R mesially.

[0031] Fig. 3 is a perspective view showing the state in which orthodontic wires 11 are attached to the upper and lower jaw teeth. However, Fig. 3 shows only the portions of the upper and lower jaw teeth that are not covered by gums and are exposed to the outside.

[0032] (bracket) The torque angle, angulation angle, offset angle, and span (the distance between the outer sides of the left and right wings) of the bracket 201 are determined for each tooth. Examples of brackets 201 are shown in FIGS. 4A to 4E for a maxillary right central incisor, a maxillary right lateral incisor, a maxillary right canine, a maxillary right first premolar, and a maxillary right second premolar. In the bracket 201 for the maxillary canine shown in FIG. 4C, the left (distal) wing has a protrusion that protrudes upward. The intermaxillary rubber band 400, described below, is hooked onto the bracket 201 using this protrusion. Below, unless otherwise necessary, illustration and description of the protrusion of the bracket 201 for the maxillary canine will be omitted. In the brackets 201 for the maxillary right first premolar and maxillary right second premolar shown in FIGS. 4D and 4E, the right (proximal) wing has a protrusion that protrudes upward. In the following, illustration and description of the protrusions of the brackets 201 for the maxillary right first premolar and maxillary right second premolar will be omitted. An example of the bondable tube 202 for the first molars 6L and 6R is shown in FIG. 4F. As shown in FIG. 4F, the right side (proximal side) of the bondable tube 202 has a protrusion that protrudes upward. The intermaxillary rubber 400, which will be described later, is hooked onto the bondable tube 202 using this protrusion. As an example, the use of the "Microarch Formula R (Ross Type) Upper Jaw" manufactured by Tommy International Co., Ltd. will be described as follows. The bracket 201 for the maxillary central incisors shown in Figure 4A has a torque angle of 12°, an angulation angle of 5°, an offset angle of 0°, and a span of 3.4 mm. The bracket 201 for the maxillary lateral incisors shown in Figure 4B has a torque angle of 8°, an angulation angle of 9°, an offset angle of 0°, and a span of 2.6 mm. The bracket 201 for the maxillary canines shown in Figure 4C has a torque angle of -2°, an angulation angle of 10°, an offset angle of 4°, and a span of 2.6 mm. The brackets 201 for the maxillary right first premolar and maxillary right second premolar shown in Figures 4D and 4E have a torque angle of -7°, an angulation angle of 0°, an offset angle of 2°, and a span of 2.6 mm. In Figures 4A to 4E, symbol 201a indicates the slot of the bracket 201.The cross-sectional shape of the slot 201a is generally approximately rectangular. The bondable tube 202 has a torque angle of -14°, an angulation angle of 0°, an offset angle of 14°, and a span of 4.0 mm.

[0033] The inventor has demonstrated through his many years of orthodontic treatment that the use of the orthodontic wire 11 enables three-dimensional tooth movement with almost no damage to the tissue. The mechanism by which the use of the orthodontic wire 11 enables three-dimensional tooth movement has not yet been fully elucidated theoretically, but an attempt will be made below to provide a theoretical explanation of this mechanism.

[0034] As already mentioned, the orthodontic wire 11 has a tip-back bend B at the boundary between the first portion 11a and the second portion 11b, as shown in FIGS. 1A to 1D. TB , a torque holding bend portion B is formed at the boundary between the second portion 11b and the third portion 11c. TH , a tip back bend portion B at the boundary between the fifth portion 11e and the fourth portion 11d TB , a torque holding bend portion B at the boundary between the fourth portion 11d and the third portion 11c TH Therefore, when the orthodontic wire 11 is passed through the slot 201 a of each bracket 201 and the bondable tube 202, the third portion 11 c has a torque holding bend B TH The orthodontic wire 11 for maxillary teeth is bent downward as shown in FIG. 7 with respect to the second portion 11b and the fourth portion 11d, and the orthodontic wire 11 for mandibular teeth is bent upward as shown in FIG. 8. The first portion 11a and the fifth portion 11e are bent downward as shown in FIG. 7 with respect to the tip-back bend B. TBThe orthodontic wire 11 for maxillary teeth is bent downward as shown in FIG. 5 with respect to the second portion 11b and the fourth portion 11d, and the orthodontic wire 11 for mandibular teeth is bent upward as shown in FIG. 6. As a result, the first portion 11a, the fifth portion 11e, and the third portion 11c are positioned in approximately the same plane. On the other hand, the second portion 11b and the fourth portion 11d are bent downward as shown in FIG. 5 with respect to the third portion 11c. TH As a result, the orthodontic wire 11 for maxillary teeth is bent upward in a mountain-like shape as shown in FIG. 5, and the orthodontic wire 11 for mandibular teeth is bent downward in a mountain-like shape as shown in FIG. 6. Ignoring the curvature of the second and fourth portions 11b and 11d, the orthodontic wire 11 as a whole lies in approximately the same plane. Due to the elasticity of the orthodontic wire 11, a force acts vertically upward relative to the third plane, as shown by the arrow in FIG. 5, on the orthodontic wire 11 for maxillary teeth, restoring the third portion 11c to its original position, as indicated by the dashed-dotted line. Meanwhile, a force acts vertically downward relative to the third plane, as shown by the arrow in FIG. 6, on the orthodontic wire 11 for mandibular teeth, restoring the third portion 11c to its original position, as indicated by the dashed-dotted line. In either case, a torque is applied in a rotational direction that tilts the anterior teeth labiolingually. This force acts as an orthodontic force in a substantially vertical direction. This force is applied to the torque holding bend B. TH The force is greatest as the tooth approaches the center, increasing in the order of central incisors, lateral incisors, and canines, as shown by the lengths of the vertical arrows in Figures 5 and 6. For example, if a stainless steel wire with a rectangular cross-section of 0.41 mm x 0.56 mm (0.016" x 0.022") is used as orthodontic wire 11, a force of 100±30 gf is applied to the maxillary and mandibular central incisors, a force of 200±50 gf is applied to the maxillary and mandibular lateral incisors, and a force of 250±50 gf is applied to the maxillary and mandibular canines. Meanwhile, because the power chains are hooked to each bracket and bondable tube as mentioned above, an orthodontic force is applied to the orthodontic wire 11 in a nearly horizontal direction, acting on the lingual side.

[0035] 7A shows an example of a state in which an orthodontic wire 11 is passed through slots 201a of brackets 201 attached to maxillary left and right central incisors 1L and 1R, maxillary left and right lateral incisors 2L and 2R, maxillary left and right canines 3L and 3R, and maxillary left and right first premolars 4L and 4R, respectively, with the dental arch laid out on a plane parallel to the frontal plane so that the orthodontic wire 11 is positioned within that plane. In FIG. 7A, symbols 201b and 201c denote the mesial and distal wings of the bracket 201, respectively. 7B to 7I are enlarged cross-sectional views of the orthodontic wire 11 in the slots 201a of the brackets 201 attached to the maxillary right first premolar 4R, maxillary right canine 3R, maxillary right lateral incisor 2R, maxillary right central incisor 1R, maxillary left central incisor 1L, maxillary left lateral incisor 2L, maxillary left canine 3L, and maxillary left first premolar 4L, respectively, with the left side of each view being the anterior side. It is important to note here that the orthodontic wire 11 has a rectangular cross-section with its long sides approximately horizontal in the area of ​​the first premolars 4L and 4R, whereas the orthodontic wire 11 is twisted and rotated around its central axis in the areas of the maxillary left and right central incisors 1L and 1R, maxillary left and right lateral incisors 2L and 2R, and maxillary left and right canines 3L and 3R, so that the long sides of the rectangular cross-section, and therefore the top surface of the orthodontic wire 11, are inclined so that the inner sides are lower than the horizontal. 8 shows an enlarged view of the orthodontic wire 11 in this state, covering the portion from the maxillary first premolar 4R to the maxillary right canine 3R. Also, FIG. 9 shows a plan view of the orthodontic wire 11 in this state.

[0036] For a certain period of time after the orthodontic wire 11 is attached, the orthodontic wire 11 in the slot 201a of the bracket 201 attached to the maxillary left and right central incisors 1L and 1R, the maxillary left and right lateral incisors 2L and 2R, and the maxillary left and right canines 3L and 3R is usually in surface contact with the bottom or side of the slot 201a. After a certain period of time has passed since the orthodontic wire 11 was attached, the torque holding bend portion B THThe provision of the orthodontic wire 11 allows a continuous vertical force to be applied to the third plane, and furthermore, a horizontal orthodontic force is applied by the power chain. As a result, the maxillary left and right central incisors 1L and 1R, the maxillary left and right lateral incisors 2L and 2R, and the maxillary left and right canines 3L and 3R move. As a result, the orthodontic wire 11 comes into point or line contact with the bottom and both sides of the slot 201a of the bracket 201, and is fixed in this state thereafter. In other words, the orthodontic wire 11 is locked in point or line contact with the bottom and both sides of the slot 201a of the bracket 201. This state is shown in FIGS. 10 to 12. FIG. 10 is a cross-sectional view showing the orthodontic wire 11 threaded through the slot 201a of the bracket 201 attached to the maxillary right central incisor 1R. FIG. 11 is a cross-sectional view showing the orthodontic wire 11 threaded through the slot 201a of the bracket 201 attached to the maxillary right lateral incisor 2R. FIG. 13 is a cross-sectional view showing the orthodontic wire 11 passed through the slot 201a of a bracket 201 attached to the maxillary right canine 3R. The cross-sectional shape and dimensions of the slot 201a of the bracket 201 are determined appropriately depending on the orthodontic wire 11 to be used. For example, when orthodontic treatment is to be performed after extraction of a first premolar and a stainless steel wire having a rectangular cross-section of 0.41 mm × 0.56 mm (0.016" × 0.022") is used as the orthodontic wire 11, the slot 201a has a rectangular cross-sectional shape of 0.56 mm (width) × 0.71 mm (depth) (0.022" × 0.028") . When orthodontic treatment is to be performed after extraction of a second premolar and a stainless steel wire having a rectangular cross-sectional shape of 0.43 mm × 0.64 mm (0.017" × 0.025") is used as the orthodontic wire 11, a bracket 201 having a similar slot 201a is also used. As shown in Figures 10 to 12, the orthodontic wire 11 is housed in a slot 201a with a rectangular cross-sectional shape, rotated by an angle Θ, with one edge E1 of the orthodontic wire 11 making point or line contact with the bottom surface of the slot 201a, and two edges E2 and E3 on either side of this edge E1 making point or line contact with both side surfaces of the slot 201a.Θ is typically approximately equal to θ2; for example, if θ2 is 20°, Θ is also approximately 20°. In Figures 10 to 12, for example, if F1 and F2 are approximately equal in magnitude, the angle between the horizontal direction and the resultant force F of F1 and F2 is approximately 45°. The same applies to the maxillary left central incisor 1L, maxillary left lateral incisor 2L, and maxillary left canine 3L. Meanwhile, Figure 13 is a cross-sectional view showing an orthodontic wire 11 threaded through a slot 201a of a bracket 201 attached to a first premolar 4R. As shown in Figure 13, the orthodontic wire 11 is housed in the slot 201a in an approximately horizontal position, with some portion of the wire in contact with the side or bottom of the slot 201a. In this case, the orthodontic wire 11 has play in the slot 201a and is not locked. The above also applies to the maxillary left first premolar, the maxillary left and right second premolars, and further to the mandibular left and right first premolars and second premolars.

[0037] 10 to 12, after one ridge E1 of the orthodontic wire 11 is locked in point or line contact with the bottom surface of the slot 201a and two ridges E2 and E3 on either side of this ridge E1 are locked in point or line contact with both side surfaces of the slot 201a, a substantially horizontal orthodontic force F1 and a substantially vertical orthodontic force F2 perpendicular to the third plane are applied by the orthodontic wire 11 to each bracket 201 attached to the maxillary right central incisor 1R, maxillary right lateral incisor 2R, and maxillary right canine 3R. As a result, a resultant force F of F1 and F2 is applied to each bracket 201 and, ultimately, to the crown of the tooth to which the bracket 201 is attached. As shown in Figures 2A and 2B, the substantially horizontal orthodontic force F1 is directed toward a virtual point P (e.g., a point in the horizontal and median plane where the dental arch is located) that is ultimately set and reflects the curvature of the dental arch. However, point P does not mean an exact point, but rather a region with a certain extent, for example, a circular region with a diameter of approximately 1 to 10 mm. As a result of the resultant force F being applied to the maxillary right central incisor 1R, maxillary right lateral incisor 2R, and maxillary right canine 3R, these teeth undergo three-dimensional tooth movement so that the roots of these teeth align toward a hypothetical point (herein referred to as the gathering point GP) set as the intersection of the extensions of the central axes (or tooth axes) of the roots of these teeth. However, the gathering point GP does not mean an exact point, but rather a region with a certain extent, for example, a spherical region with a diameter of approximately 1 to 10 mm. Because the orthodontic wire 11 is in point or line contact with the slot 201a as described above, the frictional force between the orthodontic wire 11 and the slot 201a can be significantly reduced during this tooth movement, allowing the orthodontic wire 11 to move smoothly within the slot 201a. As a result, not only is the horizontal orthodontic force smaller, but it also enables faster, smoother, and safer tooth movement. The same applies to the maxillary left central incisor 1L, maxillary left lateral incisor 2L, and maxillary left canine 3L, as well as the mandibular left and right central incisors, mandibular left and right lateral incisors, and mandibular left and right canines.As a result of the above, three-dimensional tooth movement is possible for the anterior teeth, and ultimately the roots of each tooth can be radially aligned toward the set point GP.

[0038] Figure 14 shows how three-dimensional tooth movement occurs in this way. In Figure 14, reference numeral 301 denotes the alveolar bone, 302 the periodontal ligament, 303 the tooth, and 304 the gums. As described above, the bracket applies an orthodontic force F1 in a substantially horizontal direction and an orthodontic force F2 in a substantially vertical direction to tooth 303, and the resultant force F is applied to tooth 303, causing three-dimensional tooth movement of tooth 303 as shown by the dashed-dotted line. Since no jiggling occurs during this process, root resorption of tooth 303 can be effectively prevented.

[0039] On the other hand, as shown in Fig. 13, an orthodontic force F1 acts in a substantially horizontal direction on the bracket 201 attached to the first premolar 4R because the orthodontic wire 11 is housed in the slot 201a in a substantially horizontal state. In addition, an approximately upward force (denoted as F3) acts on the bracket 201 attached to the first premolar 4R because the second portion 11b and the fourth portion 11d of the orthodontic wire 11 are curved upward in a mountain shape as shown in Fig. 5. As a result, the bracket 201 attached to the first premolar 4R, and ultimately the crown portion of the first premolar 4R, is subjected to the resultant force of F1 and F3. As a result of this resultant force, the first premolar 4R ultimately undergoes tooth body movement such that the extension of the central axis of its root is directed toward the confluence point GP. The above also applies to the maxillary left first premolar, the maxillary left and right second premolars, and further to the mandibular left and right first premolars and second premolars.

[0040] A more specific description will be given of a method for performing orthodontic treatment using the orthodontic wire 11, taking as an example a case where orthodontic treatment is performed on maxillary teeth. The same applies to a case where orthodontic treatment is performed on mandibular teeth.

[0041] The first premolar is extracted and orthodontic treatment is performed. In this case, as shown in FIG. 15A, an orthodontic wire 11 is used, which is made of stainless steel and has a rectangular cross-section of 0.41 mm × 0.56 mm (0.016" × 0.022"), with θ1 = θ2 = 20°. The length L4 of the fourth portion 11d is selected to be approximately equal to the distance between the boundary between the right second premolar 5R and first molar 6R and a position 3 to 5 mm distal from the distal end face of the bracket 201 attached to the anterior surface of the coronal portion of the left canine 3R. Similarly, the length L2 of the second portion 11b is selected to be approximately equal to the distance between the boundary between the left second premolar 5L and first molar 6L and a position 3 to 5 mm distal from the distal end face of the bracket 201 attached to the anterior surface of the coronal portion of the left canine 3L.

[0042] First, brackets 201 are bonded to the front surface of the crowns of the patient's maxillary anterior teeth and premolars, and a bondable tube 202 is bonded to the front surface of the crown of the first molar 6R. The orthodontic wire 11 is then attached to these brackets 201 and bondable tube 202 by the method already described. In this way, the orthodontic wire 11 is fixed to the maxillary teeth using these brackets 201 and bondable tube 202. Thereafter, as already described, a power chain (not shown) is hooked to these brackets 201 and bondable tube 202. Figure 15B shows the dental arch with the orthodontic wire 11 attached, as seen from the right side. At this time, the tip-back bend B at the boundary between the first portion 11a and the second portion 11b is TB The torque holding bend B at the boundary between the second part 11b and the third part 11c is located at the boundary between the second premolar 5L and the first molar 6L on the left side. TH The tip-back bend portion at the boundary between the fifth portion 11e and the fourth portion 11d is located 3 to 5 mm distal from the distal end face of the bracket 201 attached to the front surface of the crown of the left canine tooth 3L. TB The torque holding bend B at the boundary between the fourth part 11b and the third part 11c is located at the boundary between the second premolar 5R and the first molar 6R on the right side. THare positioned 3 to 5 mm distal from the distal end face of the bracket 201 attached to the front surface of the crown of the right canine tooth 3R.

[0043] When the orthodontic wire 11 is attached to the patient's maxillary teeth as described above, the front teeth ultimately move three-dimensionally so that the extension lines of the central axes of their roots point toward the confluence point GP, and the second premolars 5L and 5R also move so that the extension lines of the central axes of their roots point toward the confluence point GP. During this process of the movement of the front teeth and second premolars 5L and 5R, the space created by the extraction of the first premolar is closed (or filled). 15B, the second portion 11b and the fourth portion 11d of the orthodontic wire 11 are curved upward in a mountain shape, but when the orthodontic wire 11 is placed in the slot 201a of the bracket 201 attached to the front surfaces of the crowns of the second premolars 5L and 5R, the upward curvature of the orthodontic wire 11 is restricted by the slot 201a, so that the orthodontic wire 11 comes into contact with the upper side surface of the slot 201a in the mesial wing 201b and the lower side surface of the slot 201a in the distal wing 201c. As a result, an upward force F3 is applied to the second premolars 5L and 5R in a direction slightly tilted backward from the vertical. In this case, tip-back of the first molars 6L and 6R is achieved by applying force to the first molars 6L and 6R from the first portion 11a and fifth portion 11e of the orthodontic wire 11, with the second premolars 5L and 5R as fulcrums. However, since the upward force F3 is applied to the second premolars 5L and 5R, which serve as fulcrums, as described above, extrusion of the second premolars 5L and 5R is prevented. Additionally, the second portion 11b and fourth portion 11d of the orthodontic wire 11 have play within the slots 201a of the brackets 201 and are not locked, preventing the occlusal relationship between the second premolars 5L and 5R and the mandibular second premolars 5L and 5R from being impaired. Orthodontic treatment is performed in this manner.

[0044] (Intermaxillary rubber bands) Figure 16A shows an intermaxillary rubber band 400 that constitutes a dental set for open bite treatment according to this embodiment. As shown in Figure 16A, the intermaxillary rubber band 400 has a rectangular cross-sectional shape. The material, diameter, height, and thickness of the intermaxillary rubber band 400 are selected as needed so that the intermaxillary rubber band 400 can be stretched and taut for open bite treatment. For example, the material may be latex or polyurethane rubber, with a diameter (outer diameter) of 4 to 7 mm, a height of 0.8 to 1.3 mm, and a thickness in the diametric direction of 0.5 to 1.2 mm. Figure 16B shows the intermaxillary rubber band 400 in a tightly stretched state.

[0045] A method of using the intermaxillary elastic 400 for open bite treatment will now be described.

[0046] Consider the case where a patient's open bite is as shown in Figure 17. As shown in Figure 17, when the maxillary molars (first premolars 4R, 4L, second premolars 5R, 5L, first molars 6R, 6L) and the mandibular molars (first premolars 4R, 4L, second premolars 5R, 5L, first molars 6R, 6L) are in occlusion, there is a gap between the maxillary anterior teeth (central incisors 1R, 1L, lateral incisors 2R, 2L, canines 3R, 3L) and the mandibular anterior teeth (central incisors 1R, 1L, lateral incisors 2R, 2L, canines 3R, 3L). Here, we consider a case where the maxillary molars and / or mandibular molars are intruded to treat this open bite. However, Figure 17 shows the case where the maxillary and mandibular teeth form an ideal dental arch, except for the open bite.

[0047] As shown in Fig. 18, brackets 201 and orthodontic wire 11 are attached to the maxillary and mandibular teeth. In this state, to depress the maxillary molars, as shown in Fig. 19, an intermaxillary rubber band 400 is hooked from above onto the protruding portion of the bracket 201 attached to the maxillary canine 3R and stretched, while being hooked from below onto the protruding portion of the bracket 201 attached to the mandibular canine 3R, and then hooked onto the protruding portion of the bondable tube 202 of the maxillary first molar 6R and stretched across. Similarly, an intermaxillary rubber band 400 is hooked from above onto the protruding portion of the bracket 201 attached to the maxillary canine 3L and stretched, while being hooked from below onto the protruding portion of the bracket 201 attached to the mandibular canine 3L, and then hooked onto the protruding portion of the bondable tube 202 of the maxillary first molar 6L and stretched across. 20, to depress the mandibular molars, the intermaxillary rubber band 400 is hooked from below onto the protruding portion of the bracket 201 attached to the mandibular canine 3R and stretched, while being hooked from above onto the protruding portion of the bracket 201 attached to the maxillary canine 3R, and then hooked onto the protruding portion of the bondable tube 202 of the mandibular first molar 6R and stretched across. Similarly, the intermaxillary rubber band 400 is hooked from below onto the protruding portion of the bracket 201 attached to the mandibular canine 3L and stretched, while being hooked from above onto the protruding portion of the bracket 201 attached to the maxillary canine 3L, and then hooked onto the protruding portion of the bondable tube 202 of the mandibular first molar 6L and stretched across.

[0048] Although the mechanism by which the molars are depressed by stretching the intermaxillary rubber band 400 as described above while the orthodontic wire 11 is attached has not yet been fully elucidated theoretically, the following attempts to provide a theoretical explanation of this mechanism. As an example, using FIG. 21 , we will explain the case where the maxillary first premolar 5R and first molar 6R are depressed by a strongly stretched intermaxillary rubber band 400. FIG. 21 is a view similar to FIG. 15B . As shown in FIG. 21 , the intermaxillary rubber band 400 is stretched across the bracket 201 of the maxillary canine 3R in a strongly stretched state. As a result, a tensile force F4 is applied to the bracket 201 in the direction connecting this bracket 201 and the bracket 201 of the mandibular canine 3R. The tensile force F4 is the resultant force of the tension acting on the left and right portions of the intermaxillary rubber band 400 shown in FIG. 21 . When the pulling force F4 is applied to the bracket 201, the canine 3R to which the bracket 201 is attached is pulled downward, resulting in a slight downward movement of the canine 3R compared to its state before the intermaxillary rubber 400 was stretched. This state is shown in Figure 22. In Figure 22, the outline of the canine 3R before movement is indicated by a dashed line. When the canine 3R moves slightly downward, the orthodontic wire 11 passing through the slot 201a of the bracket 201 attached to the canine 3R is pressed from above by the upper surface of the slot 201a, causing it to bend downward and convex. As a result, a clockwise force acts on the portion of the orthodontic wire 11 that is located on the molars behind the canine 3R, with the bracket 201 attached to the canine 3R as a fulcrum. That is, as shown in Figure 22, a force F5 acts on the second premolar 5R and a force F6 acts on the first molar 6R. F5 acts to depress the second premolar 5R, and F6 acts to depress the first molar 6R. As a result of the constant application of force F5 to the second premolar 5R and force F6 to the first molar 6R, the second premolar 5R and first molar 6R are gradually depressed, and after a certain period of time, the second premolar 5R and first molar 6R are depressed as shown in Figure 23. In Figure 23, the outlines of the second premolar 5R and first molar 6R before movement are shown by dashed lines. The state of depressing the second premolar 5R and first molar 6R is periodically observed, and once the required amount of depressing has been confirmed, the intermaxillary rubber 400 is removed.If the mandibular first premolar 5R and first molar 6R also need to be depressed in the same way, they are depressed in the same way. In this way, the patient's open bite can be treated.

[0049] A specific example in which open bite treatment was actually performed using the dental set for open bite treatment according to this embodiment will be described.

[0050] (Treatment example 1) Figures 24A-C are photographs of the upper and lower jaw teeth of patient 1 taken from the front, right, and left sides at the time of starting open bite treatment after orthodontic treatment using orthodontic wire 11, including leveling and alignment of the upper and lower jaw teeth, correction of dental arch shape, and some correction of torsional teeth. The first premolars on both the left and right sides of the upper and lower jaw were extracted. The orthodontic wire 11 was made of stainless steel and had a rectangular cross-section measuring 0.41 mm x 0.56 mm (0.016" x 0.022"), with θ1 = θ2 = 20°. As shown in Figures 24A-C, in this state, there is a large gap between the upper and lower front teeth, indicating an open bite. To begin open bite treatment with intrusion of the maxillary first premolar and first molar, intermaxillary elastics were placed over the bracket on the maxillary canine, the bracket on the mandibular canine, and the bondable tube on the maxillary first molar in this order. The intermaxillary elastics used were "Rabbit Zoo Park" manufactured by Ormco Corporation. The intermaxillary elastics used are shown in Figure 24D. These intermaxillary elastics have a diameter of 3 / 16 inch (4.76 mm) and a force of 3.5 ounces (100 g force). When these intermaxillary elastics were stretched as shown in Figure 16B, the pulling forces at lengths of 10 mm, 20 mm, 30 mm, and 40 mm were approximately 50 g force, 100 g force, 150 g force, and 200 g force, respectively. The tension acting on each part of the intermaxillary elastic was half of this pulling force.

[0051] Figures 25A-C are photographs of the upper and lower jaw teeth of Patient 1 taken from the front, right, and left sides approximately six months after intermaxillary elastics were applied in the following order: bracket on the upper canine, bracket on the lower canine, and bondable tube on the upper first molar. As shown in Figures 25A-C, in this state, there is almost no gap between the upper and lower anterior teeth. This completes the intrusion of the upper first premolar and first molar.

[0052] Next, approximately two months after completing the intrusion of the maxillary first premolar and first molar, intrusion of the mandibular first premolar and first molar was performed by stretching intermaxillary elastics across the bracket for the mandibular canine, the bracket for the maxillary canine, and the bondable tube for the mandibular first molar in that order. Figures 26A-C are photographs of Patient 1's upper and lower jaw teeth in this state, taken from the front, right, and left.

[0053] Figures 27A-C are photographs of Patient 1's upper and lower jaw teeth taken from the front, right, and left sides approximately one year after intermaxillary elastics were applied in the following order: bracket on the lower canine, bracket on the upper canine, and bondable tubing on the lower first molar. The brackets, bondable tubing, orthodontic wires, and intermaxillary elastics have all been removed. As shown in Figures 27A-C, in this state, the gap between the upper and lower anterior teeth has completely disappeared. There is no extrusion of the anterior teeth. This marks the end of open bite treatment.

[0054] (Treatment example 2) Figures 28A-C are photographs of the upper and lower jaw teeth of Patient 2 taken from the front, right, and left sides at the time of initiating open bite treatment after orthodontic treatment using an orthodontic wire 11, including leveling and alignment of the upper and lower jaw teeth, correction of dental arch shape, and some correction of torsional teeth. Patient 2 has a skeletal open bite that is difficult to treat. The orthodontic wire 11 used was the same as in Treatment Example 1. As shown in Figures 28A-C, in this state, there is a large gap between the upper and lower anterior teeth, resulting in an open bite. To perform open bite treatment, intermaxillary elastics were stretched across the bracket on the upper canine, the bracket on the lower canine, and the bondable tube on the upper first molar in that order. The intermaxillary elastics used were the same as in Treatment Example 1.

[0055] Figures 29A-C are photographs of the upper and lower jaw teeth of Patient 2 taken from the front, right, and left sides approximately six months after intermaxillary elastics were applied in the following order: bracket on the upper canine, bracket on the lower canine, and bondable tube on the upper first molar. As shown in Figures 29A-C, in this state, there is almost no gap between the upper and lower anterior teeth. This completes the intrusion of the upper first premolar and first molar.

[0056] Next, approximately nine months after completing the intrusion of the maxillary first premolar and first molar, intrusion of the mandibular first premolar and first molar was performed by stretching intermaxillary elastics across the bracket for the mandibular canine, the bracket for the maxillary canine, and the bondable tube for the mandibular first molar in that order. Figures 30A-C are photographs of Patient 2's upper and lower jaw teeth in this state, taken from the front, right, and left.

[0057] Figures 31A-C are photographs of Patient 2's upper and lower jaw teeth taken from the front, right, and left sides approximately one year after the start of open bite treatment by depressing the lower molars. All brackets, bondable tubes, orthodontic wires, intermaxillary elastics, etc. have been removed. No extrusion of the front teeth has occurred. The gap between the upper and lower front teeth has completely disappeared, so open bite treatment is terminated.

[0058] (Treatment Case 3) Figures 32A-C are photographs of the upper and lower jaw teeth of Patient 3 taken from the front, right, and left sides at the time of initiating open bite treatment after orthodontic treatment using an orthodontic wire 11, including leveling and alignment of the upper and lower teeth, correction of dental arch shape, and some correction of torsional teeth. The orthodontic wire 11 was the same as in Treatment Example 1. As shown in Figures 32A-C, in this state, there is a large gap between the upper and lower anterior teeth, resulting in an open bite. In Treatment Example 3, the first premolars on the left and right sides were not extracted. To perform open bite treatment, intermaxillary elastics were placed in the following order: bracket on the upper canine, bracket on the lower canine, and bondable tube on the upper first molar. The intermaxillary elastics used were "Fox Zoo Park" manufactured by Ormco Corporation. This inter-jaw rubber has a diameter of 1 / 4 inch (6.35 mm) and a tension of 3.5 ounces (100 g force). When this inter-jaw rubber is pulled as shown in Figure 16B, the tension is approximately 50 g force, 100 g force, and 150 g force at lengths of 20 mm, 30 mm, and 40 mm, respectively. The tension acting on each part of this inter-jaw rubber is half of this tension force.

[0059] Figures 33A-C are photographs of the upper and lower jaw teeth of Patient 3 taken from the front, right, and left sides approximately five months after intermaxillary elastics were applied in the following order: bracket on the upper canine, bracket on the lower canine, and bondable tube on the upper first molar. As shown in Figures 33A-C, in this state, the gap between the upper and lower front teeth has significantly decreased.

[0060] Figures 34A-C are photographs of the upper and lower jaw teeth of Patient 3 taken from the front, right, and left sides approximately six months after intermaxillary elastics were applied in the following order: bracket on the upper canine, bracket on the lower canine, and bondable tube on the upper first molar. As shown in Figures 34A-C, in this state, there is almost no gap between the upper and lower anterior teeth. This marks the end of the intrusion of the upper first premolar and first molar.

[0061] Next, approximately five months after completing the intrusion of the maxillary first premolar and first molar, intrusion of the mandibular first premolar and first molar was performed by stretching intermaxillary elastics across the bracket for the mandibular canine, the bracket for the maxillary canine, and the bondable tube for the mandibular first molar in that order. Figures 35A-C are photographs of Patient 3's upper and lower jaw teeth in this state, taken from the front, right, and left.

[0062] Figures 36A-C are photographs of the upper and lower jaw teeth of Patient 3 taken from the front, right, and left sides approximately four months after intermaxillary elastics were applied in the following order: bracket on the lower canine, bracket on the upper canine, and bondable tube on the lower first molar. As shown in Figures 36A-C, in this state, the lower first premolar and first molar are indented. This completes the indentation of the lower first premolar and first molar.

[0063] Figures 37A to 37C are photographs taken from the front, right, and left of the upper and lower jaw teeth of patient 3 with intermaxillary rubber bands stretched across the bracket on the upper canine, the bracket on the lower canine, and the bondable tube on the upper first molar in this order, in order to again depress the upper first premolar and first molar.

[0064] Figures 38A-C are photographs of Patient 3's upper and lower jaw teeth taken from the front, right, and left sides approximately five months after intermaxillary elastics were placed in the following order: brackets on the upper canines, brackets on the lower canines, and bondable tubing on the upper first molars. The brackets, bondable tubing, orthodontic wires, and intermaxillary elastics have all been removed. As shown in Figures 38A-C, the open bite has been completely resolved. There is no extrusion of the front teeth. This marks the end of open bite treatment.

[0065] (Treatment Case 4) Figures 39A-C are photographs of the upper and lower jaw teeth of patient 4 taken from the front, right, and left sides at the time of initiating open bite treatment after orthodontic treatment using an orthodontic wire 11, including leveling and alignment of the upper and lower teeth, correction of dental arch shape, and some correction of torsional teeth. The orthodontic wire 11 was the same as in Treatment Example 1. As shown in Figures 39A-C, in this state, there is a gap between the upper and lower anterior teeth, resulting in an open bite. To perform open bite treatment by indenting the lower first premolar and first molar, intermaxillary elastics were stretched across the bracket on the lower canine, the bracket on the upper canine, and the bondable tube on the lower first molar in that order. The intermaxillary elastics used were the same as in Treatment Example 1.

[0066] Figures 40A-C are photographs of the upper and lower jaw teeth of Patient 4 taken from the front, right, and left sides approximately four months after intermaxillary elastics were applied in the following order: bracket on the lower canine, bracket on the upper canine, and bondable tube on the lower first molar. As shown in Figures 40A-C, in this state, there is almost no gap between the upper and lower anterior teeth. This completes the intrusion of the lower first premolar and first molar.

[0067] Figures 41A-C are photographs of Patient 4's upper and lower jaw teeth taken from the front, right, and left sides approximately nine months after intermaxillary elastics were applied in the following order: bracket on the lower canine, bracket on the upper canine, and bondable tubing on the lower first molar. The brackets, bondable tubing, orthodontic wires, and intermaxillary elastics have all been removed. As shown in Figures 41A-C, in this state, the gap between the upper and lower anterior teeth has completely disappeared. There is no extrusion of the anterior teeth. This marks the end of open bite treatment.

[0068] (Treatment Case 5) Figures 42A-C are photographs of the upper and lower jaw teeth of patient 5 taken from the front, right, and left sides at the time of starting open bite treatment after orthodontic treatment using an orthodontic wire 11, including leveling and alignment of the upper and lower jaw teeth, correction of dental arch shape, and some correction of torsional teeth. The orthodontic wire 11 was the same as in Treatment Example 1. As shown in Figures 42A-C, in this state, there is a small gap between the upper and lower front teeth, indicating a mild open bite. To perform open bite treatment, intermaxillary elastics were stretched across the bracket on the upper canine, the bracket on the lower canine, and the bondable tube on the upper first molar in that order. The intermaxillary elastics were the same as those used in Treatment Example 1.

[0069] Figures 43A-C are photographs of the upper and lower jaw teeth of Patient 5 taken from the front, right, and left sides approximately 10 months after intermaxillary elastics were applied in the following order: bracket on the upper canine, bracket on the lower canine, and bondable tube on the upper first molar. As shown in Figures 43A-C, in this state, the gap between the upper and lower anterior teeth has almost disappeared. This completes the intrusion of the upper first premolar and first molar.

[0070] Figures 44A-C are photographs of the upper and lower jaw teeth of Patient 5 taken from the front, right, and left sides approximately 11 months after intermaxillary elastics were applied in the following order: brackets on the upper canines, brackets on the lower canines, and bondable tubing on the upper first molars. The brackets, bondable tubing, orthodontic wires, and intermaxillary elastics have all been removed. As shown in Figures 44A-C, in this state, the gap between the upper and lower anterior teeth has completely disappeared. There is no extrusion of the anterior teeth. This marks the end of open bite treatment.

[0071] As described above, according to this embodiment, by using a combination of the orthodontic wire 11, bracket 201, and intermaxillary rubber 400, it is possible to depress the molars of the upper or lower jaw without causing the front teeth to protrude, thereby enabling treatment of open bite.

[0072] Although the embodiments of the present invention have been specifically described above, the present invention is not limited to the above-described embodiments, and various modifications based on the technical concept of the present invention are possible.

[0073] For example, the numerical values, structures, shapes, materials, manufacturing methods, etc. listed in the above-described embodiments are merely examples, and different numerical values, structures, shapes, materials, manufacturing methods, etc. may be used as needed. [Explanation of symbols]

[0074] B...bracket, SL...slot, 11...orthodontic wire, 11a...first part, 11b...second part, 11c...third part, 11d...fourth part, 11e...fifth part, 20...metal wire, 201...bracket, 201a...slot, 201b, 201c...wings, 400...intermaxillary rubber

Claims

1. Orthodontic wires, a bracket having a slot with a rectangular cross-sectional shape having a width of 0.56±0.05 mm or a slot with a rectangular cross-sectional shape having a width of (0.56±0.05 mm)×p (where 0.9≦p≦1.1); Intermaxillary rubber bands and and The orthodontic wire is The wire is made of an arch-shaped stainless steel wire having a rectangular cross-sectional shape of (0.41±0.05 mm) x (0.56±0.05 mm) and a first substantially linear portion, a second substantially linear portion, a central arch-shaped third portion, a fourth substantially linear portion, and a fifth substantially linear portion from one end to the other end, or a wire made of a material other than stainless steel having a cross-sectional shape similar to that of the stainless steel wire at a similarity ratio of 1:p and having mechanical properties equivalent to those of the stainless steel wire, the first portion and the fifth portion lie substantially in a first plane; the second portion and the fourth portion lie substantially in a second plane; the third portion lies substantially in a third plane; the long sides of the rectangular cross section of the stainless steel wire or the wire made of a material other than stainless steel are substantially parallel to the first plane, the second plane, and the third plane; the first plane is inclined at an angle of 12° to 25° with respect to the second plane; the third plane is inclined with respect to the second plane at an angle of 12° to 25° toward the same side as the first plane, the first and fifth portions have a length sufficient to span approximately the left or right first molar of the patient's maxilla or mandible; the second and fourth portions have a length sufficient to span approximately the first and second premolars on the left or right side of the patient's maxilla or mandible; the third portion has a length sufficient to span substantially all of the patient's upper or lower anterior teeth; The intermaxillary rubber bands are: When depressing the maxillary molars of a patient, the orthodontic wire is attached to the bracket attached to the front of the crown of the maxillary tooth, and while being stretched, it is hooked from above onto the bracket attached to the front of the crown of the maxillary canine, and then hooked from below onto the bracket attached to the front of the crown of the mandibular canine, and further hooked onto a bondable tube attached to the front of the crown of the maxillary first molar, and stretched across; When depressing a patient's lower molars, the orthodontic wire is attached to the bracket attached to the front of the crown of the lower tooth, and then the wire is hooked from below onto the bracket attached to the front of the crown of the lower canine tooth and stretched, while being hooked from above onto the bracket attached to the front of the crown of the upper canine tooth, and further hooked onto a bondable tube attached to the front of the crown of the lower first molar, thereby stretching the wire.

2. 2. The dental set for molar intrusion according to claim 1, wherein the tension generated when the intermaxillary rubber band is stretched across is between 65 g-force and 100 g-force.

3. A dental set for open bite treatment used when it is necessary to depress upper or lower molars when treating a patient's open bite, Orthodontic wires, a bracket having a slot with a rectangular cross-sectional shape having a width of 0.56±0.05 mm or a slot with a rectangular cross-sectional shape having a width of (0.56±0.05 mm)×p (where 0.9≦p≦1.1); Intermaxillary rubber bands and and The orthodontic wire is The wire is made of an arch-shaped stainless steel wire having a rectangular cross-sectional shape of (0.41±0.05 mm) x (0.56±0.05 mm) and a first substantially linear portion, a second substantially linear portion, a central arch-shaped third portion, a fourth substantially linear portion, and a fifth substantially linear portion from one end to the other end, or a wire made of a material other than stainless steel having a cross-sectional shape similar to that of the stainless steel wire at a similarity ratio of 1:p and having mechanical properties equivalent to those of the stainless steel wire, the first portion and the fifth portion lie substantially in a first plane; the second portion and the fourth portion lie substantially in a second plane; the third portion lies substantially in a third plane; the long sides of the rectangular cross section of the stainless steel wire or the wire made of a material other than stainless steel are substantially parallel to the first plane, the second plane, and the third plane; the first plane is inclined at an angle of 12° to 25° with respect to the second plane; the third plane is inclined with respect to the second plane at an angle of 12° to 25° toward the same side as the first plane, the first and fifth portions have a length sufficient to span approximately the left or right first molar of the patient's maxilla or mandible; the second and fourth portions have a length sufficient to span approximately the first and second premolars on the left or right side of the patient's maxilla or mandible; the third portion has a length sufficient to span substantially all of the patient's upper or lower anterior teeth; The intermaxillary rubber bands are: When depressing the maxillary molars of a patient, the orthodontic wire is attached to the bracket attached to the front of the crown of the maxillary tooth, and while being stretched, it is hooked from above onto the bracket attached to the front of the crown of the maxillary canine, and then hooked from below onto the bracket attached to the front of the crown of the mandibular canine, and further hooked onto a bondable tube attached to the front of the crown of the maxillary first molar, and stretched across; When depressing a patient's lower molars, the orthodontic wire is attached to the bracket attached to the front of the crown of the lower tooth, and then the wire is hooked from below onto the bracket attached to the front of the crown of the lower canine tooth and stretched, while being hooked from above onto the bracket attached to the front of the crown of the upper canine tooth, and further hooked onto a bondable tube attached to the front of the crown of the lower first molar, thereby stretching the wire.

4. 4. The dental set for open bite treatment according to claim 3, wherein the tension generated when the intermaxillary rubber band is stretched is between 65 g-force and 100 g-force.

Images