JP2014054418A - Orthodontic bracket, and creation method of orthodontic bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve at least one of (1)reduction of cost or labor related to alignment of dentition by reducing a technology level and cost required for the production of a bracket, (2) facilitation of determination of a bracket fixing position with respect to teeth of an object person for free medical treatment and (3) reduction of a gap between an actual fixing position and an ideal fixing position of the bracket with respect to teeth of the object person for free medical treatment.SOLUTION: An orthodontic bracket is formed only of a dental resin.

Description

  The present invention relates to an orthodontic bracket and a method for producing an orthodontic bracket.

  Orthodontic treatment is often performed using a bracket and a wire (for example, refer to Patent Document 1). The bracket is a device smaller than the size of the tooth, and is generally made of metal. This bracket is used by fixing its attachment surface to a side surface (tongue side surface or cheek side surface) of a person to be treated with a dental adhesive or the like. Grooves and holes are provided on the surface opposite to the fixed mounting surface (hereinafter referred to as surface), and orthodontic metal wires are engaged and fixed in the grooves and holes. .

  This wire is an elastic member, and its original shape is formed into a bent shape that draws the desired curve so that it fits tightly when engaged and fixed to a bracket attached to an ideal dentition. Has been. And if it is deformed into a shape different from the original shape, an elastic force is exerted to return to the original shape.

  Here, the wire fixed to the bracket fixed to the dentition of the treatment subject before the completion of treatment is different from the ideal dentition of the treatment subject before the treatment is completed. It is deformed to a shape different from the shape. At this time, an elastic force is exerted on the wire to return to its original shape, and the dentition of the treatment target fixed to the wire via the bracket also has an elastic force that aligns with the ideal dentition. work. As a result, the dentition of the treatment subject is gradually corrected to the ideal position.

JP 2012-66016 A

  However, in the conventional orthodontics described above, it is necessary for the dentist to perform an operation of fixing the metal bracket to the teeth of the person to be treated. At this time, the dentist applies a dental adhesive to the teeth of the person to be treated, determines the fixing position of the bracket based on experience and intuition, and manually applies a photo-curing type adhesive to the fixing position. The applied bracket is placed, and the bracket is attached by irradiating ultraviolet rays or the like to cure the adhesive.

  For this reason, even a skilled dentist can hardly fix the bracket in an ideal position, and only a slight deviation is allowed. And since the size of a bracket is usually very small with 2-3 mm, the operation | work which fixes a bracket to a treatment subject's tooth | gear was one of the operations which use a nerve very much for a dentist.

  In addition, the metal bracket is very small and is made by casting. In addition, the engagement holes and engagement grooves of the bracket need to be formed in a size that allows the wire to slide while tightly engaging with a rectangular wire with a rectangular cross-section normally used for orthodontics to suppress its rotation. There is. For this reason, manufacture of a bracket had to ask an expert who has high technology, and had to be expensive.

  This invention was made in view of the said subject, (1) Reducing the technical level and cost required for manufacture of a bracket, and reducing the cost and labor concerning orthodontics, (2) Treatment object person At least one of facilitating determination of the fixing position of the bracket with respect to the teeth of the patient, and (3) reducing the deviation between the actual fixing position and the ideal fixing position of the bracket with respect to the teeth of the person to be treated. It is an object of the present invention to provide an orthodontic bracket and a method for producing the same.

  One of the aspects of the present invention is an orthodontic bracket that is formed of only a dental resin.

  In this way, by forming the orthodontic bracket using only the dental resin, the technical level and cost necessary for manufacturing the orthodontic bracket can be reduced, and the cost and labor for orthodontic can be reduced. It becomes possible to reduce.

  Moreover, one of the selective aspects of this invention is a structure provided with the engaging part which has an engaging surface which carries out uneven | corrugated engagement with the uneven | corrugated shape of a specific tooth | gear.

  According to this configuration, if a dental adhesive is applied to a portion that is unevenly engaged with the orthodontic bracket, and the orthodontic bracket is disposed so as to engage with the unevenness, the orthodontic bracket is arranged on a specific tooth. An orthodontic bracket can be attached. Therefore, it is easy to determine the fixing position of the orthodontic bracket with respect to the teeth of the person to be treated, and the orthodontic bracket can be fixed to the ideal fixing position.

  Moreover, in one of the selective aspects of this invention, the said engaging part is set as the structure which has an engaging surface which carries out uneven | corrugated engagement with at least one part of the cheek side surface or tongue side surface of the said specific tooth.

  According to the said structure, the orthodontic bracket which carries out uneven | corrugated engagement uniquely with respect to the uneven | corrugated shape of a cheek side surface or the tongue side surface among the uneven | corrugated shapes of the said specific tooth can be provided. That is, the engagement surface has an uneven shape obtained by transferring an uneven shape such as a curved surface or a side groove of the side surface of a specific tooth. The fixing position of the bracket can be determined.

  Moreover, in one of the selective aspects of the present invention, the specific tooth is a molar tooth, and the engaging portion has an engaging surface that engages with an uneven shape of the occlusal surface of the molar tooth. is there.

  According to the said structure, the orthodontic bracket which carries out uneven | corrugated engagement uniquely with respect to the uneven | corrugated shape of an occlusal surface among the uneven | corrugated shapes of the said specific tooth can be provided. The occlusal surface of the molar tooth is a portion rich in unevenness, which is particularly unique among the teeth, and the portion where the uneven engagement is exactly determined is almost uniquely determined. Accordingly, it becomes easy to determine the fixing position of the orthodontic bracket with respect to the teeth of the treatment subject, and the deviation between the actual fixing position and the ideal fixing position of the orthodontic bracket with respect to the teeth of the treatment subject is conventionally increased. It becomes possible to reduce it compared with.

  Moreover, in one of the selective aspects of this invention, the said engaging surface is set as the uneven | corrugated engagement in the uneven | corrugated shape from the cheek side surface of the said specific tooth to an occlusal surface.

  According to this configuration, it is possible to provide an orthodontic bracket that uniquely engages with an uneven shape from the cheek side surface to the occlusal surface among the uneven shape of the specific tooth. Since the uneven shape including the corner from the cheek side to the occlusal surface also has a unique uneven shape, it is easy to determine the fixing position of the orthodontic bracket to the teeth of the treatment subject when used for buccal correction Thus, it is possible to reduce the deviation between the actual fixed position and the ideal fixed position of the orthodontic bracket with respect to the teeth of the person to be treated as compared with the related art.

  Moreover, in one of the selective aspects of this invention, the said engagement surface is set as the structure which carries out uneven | corrugated engagement in the uneven | corrugated shape from the buccal side surface of the said specific tooth to the buccal cusp.

  According to this configuration, it is possible to provide an orthodontic bracket having an engagement surface that uniquely engages with an uneven shape from the side surface of the cheek to the buccal cusp among the uneven shape of the specific tooth. it can. For this reason, the orthodontic bracket has a suitable shape that most easily increases the locking force of the orthodontic bracket with respect to a specific part of a specific tooth, and it becomes easy to determine the fixing position of the orthodontic bracket with respect to the teeth of the person to be treated. The deviation between the actual fixed position of the orthodontic bracket and the ideal fixed position with respect to the subject's teeth can be reduced as compared with the conventional case.

  Moreover, in one of the selective aspects of this invention, the said engaging surface is set as the uneven | corrugated engagement to the uneven | corrugated shape from the tongue side surface of the said specific tooth to an occlusal surface.

  According to the said structure, the orthodontic bracket which has an engagement surface which engages uniquely in the uneven | corrugated shape from the tongue side surface of the said specific tooth to the occlusal surface among the uneven | corrugated shape of the said specific tooth is provided. be able to. For this reason, when used for lingual correction, it becomes easy to determine the fixing position of the orthodontic bracket with respect to the teeth of the treatment subject, and the actual fixing position of the orthodontic bracket with respect to the teeth of the treatment subject and the ideal It is possible to reduce the deviation between the fixed positions as compared with the conventional case.

  Moreover, in one of the selective aspects of this invention, the said engagement surface is set as the structure which carries out uneven | corrugated engagement in the uneven | corrugated shape from the lingual side surface of the said specific tooth to the lingual cusp.

  According to this configuration, it is possible to provide an orthodontic bracket having an engagement surface that engages in a concavo-convex shape from the side surface of the tongue to the lingual cusp among the concavo-convex shape of the specific tooth. For this reason, when used for lingual correction, it becomes easy to determine the fixing position of the orthodontic bracket with respect to the teeth of the treatment subject, and the actual fixing position of the orthodontic bracket with respect to the teeth of the treatment subject and the ideal It is possible to reduce the deviation between the fixed positions as compared with the conventional case.

  Moreover, in one of the selective aspects of this invention, the said engaging part is set as the structure which has the surrounding part surrounding the circumference of the cusp of the said specific tooth.

  According to the said structure, since it has the surrounding part surrounding the circumference | surroundings of the cusp of the said specific tooth, it has the influence with respect to the occlusion at the time of orthodontic correction, raising the locking force of the bracket for orthodontics and the said specific tooth. Can be reduced as much as possible.

  Moreover, in one of the selective aspects of the present invention, the surrounding portion surrounds the portion around the cusp of the specific tooth and excluding the portion facing the groove running through the central portion of the cusp. is there.

  According to this configuration, while increasing the locking force of the orthodontic bracket with respect to the cusp of the specific tooth, the part facing the groove running through the central part of the cusp where the upper and lower teeth are easily contacted by occlusion, Since the orthodontic bracket is not attached, it is possible to reduce the uncomfortable feeling that the treatment subject feels in the mouth.

  Moreover, in one of the selective aspects of this invention, the said engaging part is set as the structure by which the wire penetration hole which can penetrate an orthodontic wire is formed in the side surface side of the said specific tooth.

  According to this configuration, since the wire insertion hole through which the orthodontic wire can be inserted is formed only by the dental resin, it is necessary to provide a structure for fixing the orthodontic wire in the orthodontic bracket. In addition, it is possible to perform orthodontic treatment without using an O-ring or a ligature wire to fix the orthodontic wire.

  Moreover, in one of the selective aspects of the present invention, the wire insertion hole has a funnel shape in which the diameter of the hole gradually increases as the opening is closer to the entrance.

  According to the said structure, it becomes easy to insert an orthodontic wire in the said wire penetration hole, and the work burden of the dentist who concerns on an orthodontic can be reduced.

  Moreover, in one of the selective aspects of this invention, it is set as the structure by which the lubricant was adhered to the inner surface of the said wire penetration hole. Moreover, in one of the selective aspects of this invention, it is set as the structure by which the powdery material is adhered to the inner surface of the said wire penetration hole.

  According to these configurations, it becomes easy to insert the orthodontic wire into the wire insertion hole, and the position of the orthodontic wire in the wire insertion hole is naturally following the movement of the teeth by the orthodontic. Adjusted. Therefore, the burden on the patient can be reduced, and the frequency of position adjustment of the orthodontic wire, which has been conventionally performed, can be reduced.

  Moreover, in one of the selective aspects of this invention, the said engagement part is the engagement which carries out uneven | corrugated engagement with the orthodontic wire by opening toward the said side surface side of the said specific tooth. The groove is formed.

  According to this configuration, even if it is difficult to insert the orthodontic wire when the orthodontic bracket of the type in which the wire insertion hole is formed is attached, the tooth using the orthodontic bracket made of a dental resin is used. It becomes possible to perform column correction.

  Note that the orthodontic bracket described above includes various aspects such as being implemented in a state of being incorporated in another device or being implemented together with another method. In addition, the present invention can be realized as an orthodontic method performed using the orthodontic bracket, an orthodontic bracket creation method for creating the orthodontic bracket, and the like.

  According to the present invention, (1) reducing the technical level and cost necessary for the manufacture of orthodontic brackets to reduce the cost and labor involved in orthodontic treatment, and (2) teeth for the teeth of the person being treated Facilitating determination of the fixing position of the orthodontic bracket; (3) reducing the deviation between the actual fixing position and the ideal fixing position of the orthodontic bracket with respect to the teeth of the person to be treated; At least one of the following can be realized.

It is a typical perspective view which shows the structure of the orthodontic bracket which concerns on 1st Embodiment. It is a figure explaining the structure of the orthodontic bracket which concerns on 2nd Embodiment. It is a figure explaining the structure of the orthodontic bracket which concerns on 3rd Embodiment. It is a figure explaining the structure of the orthodontic bracket which concerns on 4th Embodiment. It is a flowchart which shows the bracket preparation procedure for orthodontics which concerns on 5th Embodiment. It is a figure of the setup tooth type model manufactured in 5th Embodiment. It is typical sectional drawing explaining the bracket for orthodontics of the through-hole type which concerns on 5th Embodiment. It is typical sectional drawing explaining the bracket type orthodontic bracket preparation which concerns on 5th Embodiment. It is typical sectional drawing explaining the bracket type orthodontic bracket preparation which concerns on 5th Embodiment. It is a perspective view explaining the shape of a mold member. It is a figure explaining the orthodontic method which concerns on 6th Embodiment.

Hereinafter, embodiments of the present invention will be described in the following order.
(1) First embodiment:
(2) Second embodiment:
(3) Third embodiment:
(4) Fourth embodiment:
(5) Fifth embodiment:
(6) Sixth embodiment:
(7) Summary:

(1) First embodiment:
FIG. 1 is a schematic perspective view showing the structure of the orthodontic bracket according to the first embodiment. A bracket 100 shown in the figure includes an engaging portion 11 having an engaging surface 12 that engages with an uneven shape on the surface of a specific tooth of a treatment subject.

  In addition, although the engaging part 11 shown to the figure has shown the bracket for orthodontics used for the buccal correction which has the engaging surface 12 which carries out uneven | corrugated engagement with the cheek side surface 201 of the object tooth 200, this is a lingual side. It can also be realized as a bracket used for correction (back side correction). In the case of a bracket used for correction of the lingual side, it has an engaging surface 12 that engages with the tongue side surface 202 in an uneven manner. However, in order to simplify the description, the following description will be given mainly taking the case of buccal correction as an example.

  The engagement surface 12 has a shape obtained by transferring the uneven shape of the surface of the target tooth 200 by molding. Therefore, the engaging surface 12 has a unique uneven shape that best fits when the concave and convex portions are engaged with the target portion of the sampled target tooth 200, and is intended to be unevenly engaged with other portions. The shape does not fit or very difficult to fit.

  Having such a unique engagement surface 12, when the dentist fixes the bracket 100 to the target tooth 200 of the person to be treated, the engagement surface 12 By searching for the best fitting part, it is possible to easily grasp the position to be attached. That is, the determination of the fixing position of the bracket 100 is very easy and the fixing operation of the bracket 100 is easy as compared with a conventional metal bracket or the like.

  The surface of the target tooth 200 can be formed by various methods. For example, as described in the bracket creation method described later, a dental resin is used as a target of a set-up tooth model. There is a method of curing in a state where it is in close contact with the part without any gap. Of course, it is also possible to use a technique such as scanning the tooth line of the person to be treated with a computer and using 3D-CAD (Computer Aided Design).

  In the engaging portion 11, a through-hole 14 as a wire insertion hole for inserting an orthodontic wire is formed in the protrusion 13 protruding to the cheek side from the contact surface with the cheek side surface 201. The through hole 14 is formed such that when the bracket 100 is attached to the target tooth 200, the formation direction of the hole is directed in a direction along the alignment direction of the tooth row.

  Although the shape of the protrusion 13 can be variously changed, it is preferable to have a smooth surface shape with less unevenness and less intrusion. As an example, it can be a gentle hilly shape. Since the protrusion 13 has no irregularities on its surface, it can prevent catching of the eating bowl or the like and accumulation of eating bowl on the recessed portion. In addition, toothpaste is easy and the mouth can be kept clean. In addition, since there are no protrusions or corners, it is difficult to damage the inner cheek of the treatment subject, and it is difficult to give the treatment subject a sense of discomfort. Needless to say, it is preferable that the surface of the other part also has a smooth surface shape with few irregularities, like the protrusion 13.

  The through-hole 14 has a funnel shape in which the opening gradually becomes smaller as it goes from the entrance to the depth of the hole, and the depth of the hole substantially matches the thickness of the orthodontic wire, The vicinity of the entrance of the hole is wider than the thickness of the orthodontic wire. By adopting the funnel shape in this way, the dentist can smoothly perform the operation of inserting the orthodontic wire into the through hole 14.

  The cross-sectional shape of the through-hole 14 is a cross-sectional shape that substantially matches the cross-sectional shape of the orthodontic wire, and when the orthodontic wire is inserted into the through-hole 14, a gap that allows the orthodontic wire to slide is opened. It is formed to a size of about. Further, when a rectangular wire having a rectangular cross section is used as the orthodontic wire, the cross section of the through hole 14 is a rectangle having substantially the same size as that of the rectangular wire. Thereby, rotation of the orthodontic wire is suppressed.

  The through hole 14 is distorted in the orthodontic wire inserted into the through hole 14 of each bracket attached to the plurality of target teeth 200 when the dental dentition of the treatment subject is corrected as an ideal tooth. It is formed at a position where it disappears. In other words, when the dentition of the treatment subject is not an ideal dentition, the orthodontic wires inserted through the through holes 14 of the brackets attached to the plurality of target teeth 200 are distorted. It has become.

  As a result, the orthodontic wires inserted through the through holes of the brackets attached to the plurality of target teeth 200 are moved to the ideal tooth alignment position with respect to the target tooth 200 at the non-ideal tooth alignment position. Apply such elastic force. As a result, the target tooth 200 of the treatment target person wearing the bracket 100 and the orthodontic wire gradually moves to an ideal tooth alignment position.

  The bracket 100 described above can be made using various materials. For example, when it is made using a dental resin, the material cost is higher than that of a metal bracket made by conventional casting. The manufacturing cost is greatly reduced because no high skill is required for production. In addition, material costs and production skills are reduced, allowing dentists to create brackets themselves, and to produce optimal brackets that meet the needs of the site at low cost.

  The shape of the bracket 100 can be selected as appropriate according to the condition of the oral cavity such as the shape and size of the teeth of the person to be treated and the occlusal condition. As a typical example, the first premolar tooth The shape of the bracket 110 suitable for application to the first tooth, the shape of the bracket 120 suitable for application to the first molar, and the bracket 130 suitable for application to a tooth having no occlusal surface, such as the front teeth, etc. The second embodiment, the third embodiment, and the fourth embodiment will be described.

(2) Second embodiment:
FIG. 2 is a diagram for explaining the shape of an orthodontic bracket suitable for application to the first premolar. The engaging portion 111 of the bracket 110 includes a first engaging portion 112 having a first engaging surface 113 that engages with the uneven shape of the occlusal surface 303 of the first premolar tooth 300. Specifically, the first engagement surface 113 has a shape that engages with the buccal cusp 303a of the first premolar 300 in an uneven manner. In the case of lingual correction, it has a shape that engages with the lingual cusp 303b of the first premolar 300 in an uneven manner.

  The first engaging portion 112 shown in the figure is formed in a shape that surrounds the periphery of the buccal cusp 303a. Thereby, the 1st engagement surface 113 will be just fit, when uneven | corrugated engagement is carried out to the buccal cusp 303a of the 1st premolar tooth 300 of a treatment subject.

  More preferably, the first engaging portion 112 is formed on both sides of the adjacent canine side and the second premolar side (or the first molar side when extracted for correction) from the buccal side. A portion other than the central groove between the cusp 303a and the lingual cusp 303b is shaped to surround the buccal side of the subject tooth 200 along the hem of the buccal cusp 303a. At this time, the 1st engaging part 112 comprises the surrounding part which encloses at least half circumference around a cusp.

  When such a bracket 110 is mounted on the first premolar tooth 300, the first engagement surface 113 engages with the buccal cusp 303 a in a concave-convex manner, but in the central groove of the first premolar tooth 300. Since the 1st engaging part 112 is not located, it is hard to produce trouble in the occlusion of a treatment subject.

  The engaging portion 111 of the bracket 110 has a second engaging portion 114 formed continuously with the first engaging portion 112. The second engagement portion 114 is raised from the buccal side surface 301 of the first premolar 300 and the buccal side surface 301 of the first premolar 300 substantially vertically toward the inner cheek of the treatment subject. And a protruding portion 116. The protrusion 116 has the same shape as the protrusion 13 according to the first embodiment described above, and a through hole 117 similar to the through hole 14 is formed.

  Such a second engaging portion 114 has a shape that covers a portion from the corner of the occlusal surface 303 and the cheek side surface 301 to the approximate center of the cheek side surface 301 when the bracket 110 is attached to the first premolar tooth 300. . That is, since the engaging part 11 is unevenly engaged with the part including the corners of the occlusal surface 303 and the cheek side surface 301, the dentist can further determine the fixing position of the bracket 110 and fix the bracket 110. It becomes easy.

(3) Third embodiment:
FIG. 3 is a view for explaining the structure of an orthodontic bracket suitable for application to the first molar. The engagement portion 121 of the bracket 120 has a first engagement portion 122 that engages with the uneven shape of the occlusal surface 403 of the first molar 400. The first engagement portion 122 has a first engagement surface 123 that engages with at least one of the two buccal cusps (the mesial buccal cusp 403a and the distal buccal cusp 403b) of the first molar 400. . In the case of lingual correction, it has a shape that engages with at least one of two cusps (the mesial lingual cusp and the distal lingual cusp) located on the lingual side of the first molar 400.

  The first engaging portion 122 shown in the figure is formed so as to surround the periphery along the hem of the mesial buccal cusp 403a and to surround the periphery along the hem of the distal buccal cusp 403b. Thereby, the 1st engagement surface 123 of the 1st engagement part 122 just fits, when uneven | corrugated engagement is carried out to the buccal cusp of the 1st molar 400 of a treatment subject.

  More preferably, the first engagement portion 122 is formed on the occlusal surface 403 from both the second premolar side (or the first premolar side when extracted for correction) and the second premolar side. Enclose from the buccal side so as to be held along at least one hem of two buccal cusps of the subject tooth 200 except for the central groove side including the mesial pit, the central pit, the distal lingual pit, etc. Shape. With such a shape, when the bracket 120 is attached to the first molar 400, the first engagement portion 122 engages with the buccal cusp in an uneven manner, but the first groove is in the central groove of the occlusal surface 403. Since the engaging portion 122 is not positioned, it is difficult for the treatment subject to bite. Such a first engaging portion 112 constitutes an surrounding portion that surrounds at least a half circumference around the cusp.

  Further, the engaging portion 121 of the bracket 120 has a second engaging portion 124 that is formed continuously with the first engaging portion 112. The second engagement portion 124 has a shape that covers a portion from the corner of the occlusal surface 403 and the cheek side surface 401 to the cheek side surface 401 when the bracket 120 is attached to the first molar 400. In this way, by forming the engaging portion 121 of the bracket so as to engage with the concave and convex portions at the portions including the corner portions of the occlusal surface 403 and the cheek side surface 401, the dentist can determine the fixing position of the bracket 120 and the bracket. The fixing operation of 120 is further facilitated.

  The second engaging portion 124 protrudes from the buccal side surface 401 of the first molar 400 toward the inner cheek of the treatment subject substantially perpendicularly from the buccal side surface 401 of the first molar 400. A projection 126 is provided. A through hole 127 similar to the through hole 14 according to the first embodiment described above is formed in the protrusion 126. The shapes of the protrusion 126 and the through hole 127 are the same as those of the protrusion 116 and the through hole 117 according to the second embodiment described above.

  On the other hand, the contact surface 125 is similar to the case of the first premolar 300 described above in that when the bracket 120 is attached to the first molar 400, it is similar to the case of the first premolar 300 described above. Also engages with unevenness. For this reason, the determination of the fixing position of the bracket 120 and the fixing operation of the bracket 120 are further facilitated by the dentist.

  In the second and third embodiments described above, the first premolars and the first molars have been described as examples. However, the other molars, canines, and central incisors are similarly occluded. Needless to say, it can be formed to have an engagement surface that abuts against the surface or the edge.

(4) Fourth embodiment:
FIG. 4 is a diagram illustrating the structure of a bracket in which a wire groove that engages with an orthodontic wire is formed. The bracket 130 shown in the figure has locking protrusions 132 and 134 and a groove 135 as an engaging groove extending in the arrangement direction of the tooth row in the engaging portion 131.

  The opening of the groove 135 is formed on the side facing the inner cheek of the person to be treated. When the bracket 130 is fixed to the target tooth of the person to be treated, the orthodontic wire is connected from the cheek side of the person to be treated. It is possible to fit. The locking protrusion 132 is formed to protrude upward on the upper side surface of the bracket 130, and the locking protrusion 134 is formed to protrude downward on the lower side surface of the bracket 130.

  When the orthodontic wire is engaged with the groove 135, the dentist hooks a ligature wire, an O-ring or the like on the locking protrusions 132, 134 and ligates the orthodontic wire so that it does not come off the groove 135.

  The bracket 130 is preferably used when it is difficult to insert the orthodontic wire into the through hole as provided in the brackets according to the first to third embodiments described above, that is, depending on the position of the tooth. In such a case, it may be difficult to insert the orthodontic wire into the through hole. In such a case, the orthodontic wire can be set from the side if the bracket 130 is formed with the groove 135. Is easy to set in the dentition of the person to be treated. Of course, it goes without saying that the bracket 130 in which the groove 135 is formed may be used for any tooth regardless of the difficulty of the insertion work of the orthodontic wire.

(5) Fifth embodiment:
Next, an example of a method for creating the orthodontic bracket described above will be described. FIG. 5 is a flowchart showing a bracket creation procedure. The bracket creating method shown in the figure includes a tooth form impression collecting step S10, an original tooth model creating step S20, a setup tooth model creating step S30, a pedestal creating step S40, and a bracket creating step S50.

  In the tooth-type impression collecting step S10, the tooth-type impression of the treatment subject is sampled using an impression agent. At this time, the number of teeth of the person to be treated is generally the same as that after orthodontics. For example, if the first premolars on the top, bottom, left and right are extracted for orthodontic treatment, the mold is taken with the first premolars extracted. However, the tooth-type impression may be taken in a state before extraction, and a set-up tooth model may be created by removing the teeth to be extracted.

  In the original tooth model creating step S20, a tooth mold material such as anhydrite is poured into the tooth mold impression cast in the tooth mold impression collecting step S10 and solidified. As a result, an original tooth model representing the tooth pattern of the treatment subject before correction is created.

  In the set-up tooth model creation step S30, a plurality of model teeth constituting the original tooth model are individually separated and rearranged by adjusting the positions so that an ideal tooth arrangement is obtained. The ideal tooth arrangement is the arrangement of teeth when the teeth are arranged at the most appropriate position in consideration of the number, shape, size, jaw size, etc. of the subject's teeth. In particular, it is the tooth arrangement that is desired to be realized in the oral cavity of the treatment subject.

  Specifically, a pseudo gingiva corresponding to the gingiva of the person to be treated is created with a wax material or the like, and the separated individual model teeth are rearranged on the pseudo gingiva so as to be an ideal tooth arrangement. . Thereby, a setup tooth model 600 imitating the tooth pattern of the person to be treated after correction as shown in FIG. 6 is created.

  In the pedestal creation step S40, a plurality of pedestals for placing the orthodontic wires at predetermined positions of the setup tooth model 600 are formed. FIG. 6 is a perspective view showing an example of a setup tooth model in which a plurality of pedestals are formed by the pedestal creation step. At least three pedestals are formed, and in the example shown in the figure, on the cheek gingival 601, one on the back side of the left and right second molars, between the canine teeth and the premolars. A total of five pedestals 602 to 606 are formed one by one and one between the central incisors.

  In the bracket creating step S50, the shape of the target portion of the target tooth to which the bracket is to be attached is molded using the setup tooth model 600, thereby obtaining a bracket having the shape of the target portion transferred to the engagement surface. create. FIG. 6 illustrates a bracket of the type having the through holes described in the first to third embodiments for the molars, and explains the canine and incisors in the fourth embodiment described above. However, the present invention is not limited to this type of bracket.

  FIG. 7 is a schematic cross-sectional view for explaining the creation of a through-hole type bracket using the setup tooth model 600. This figure shows the first premolar 610 as a target tooth cut along the X-X ′ cross section shown in FIG. 6.

  As shown in the figure, in the bracket creating step S50, a dental resin is attached so as to be in close contact with the target site of the first premolar 610. The dental resin thus attached is cured by drying or light irradiation. Thereby, the bracket 140 by which the uneven | corrugated shape of the object part was transcribe | transferred to the engagement surface is created.

  Further, in the bracket creating step S50, the dental resin is attached to the target site of the first premolar 610 with the orthodontic wire 20 placed on the plurality of pedestals 602 to 606. At this time, the dental resin is not only attached near the surface of the target site, but also from the buccal side surface of the first premolar 610 near the orthodontic wire 20 near the approximate center of the side surface of the first premolar 610. It is attached so that it rises substantially vertically.

  The raised portion 141 has a raised height d2 of the raised portion 141 larger than d1 when the distance between the side surface of the target tooth and the outer side surface of the orthodontic wire 20 is d1, and the bracket 140 has the pedestal 602. A portion of the orthodontic wire 20 placed on ˜606 will be contained therein. Thus, a through hole 142 into which the orthodontic wire 20 can be inserted is formed in the raised portion 141 of the dental resin after curing. After the bracket 140 is hardened and the orthodontic wire 20 is removed from the through-hole 142, the entrance is formed in a funnel shape by cutting with a tool such as a dental drill.

  The other shapes of the raised portion 141 and the through hole 142 are the same as those of the protrusion 116 and the through hole 117 according to the second embodiment described above.

  Moreover, in bracket creation process S50, after attaching a lubricant beforehand to the site | part which contacts the dental resin of the orthodontic wire 20, a dental resin is made to adhere to the object site | part of the 1st premolar 610. FIG. Is preferred. When the dental resin is cured in this state, the lubricant is fixed to the inner surface of the through hole 142 of the bracket 140. As a lubricant, it is a substance having a smaller coefficient of friction than a cured dental resin. For example, a fluororesin powder such as polytetrafluoroethylene (PTFE) that does not adversely affect the human body even if it enters the body. Is exemplified.

  By interposing the lubricant in this way, the sliding between the through hole 142 and the orthodontic wire 20 becomes good. That is, workability when the dentist inserts the orthodontic wire 20 into the through hole 142 is improved. Further, the orthodontic wire smoothly slides through the through-hole 142 in accordance with the position change of the tooth of the person to be treated due to correction, and the engagement position between the bracket 140 and the orthodontic wire 20 is adjusted to the optimum position. Therefore, the efficiency of orthodontics is improved, and it is not necessary to place an extra load on the teeth, roots, gums, etc. of the person to be treated.

  In the example described above, the case where the bracket is created using the tooth model created by actually collecting the dental impression of the person to be treated has been described as an example. For example, a dental model may be created by a technique using a computer such as 3D-CAD by scanning a dental impression of a treatment target with a computer or the like. Further, the bracket itself may be created by a technique using a computer such as 3D-CAD.

  Next, a method for creating a groove type bracket will be described. FIG. 8 is a schematic cross-sectional view illustrating a method for creating a groove-type bracket using the setup tooth model 600. This figure is a view showing a central incisor as the target tooth 611 cut along a substantially vertical section along Y-Y ′ shown in FIG. 6.

  In FIG. 8, first, a slightly larger amount of dental resin is attached to the target portion of the target tooth 611 to which the bracket is to be attached so that the orthodontic wire 20 is included in the arrangement range, and drying or light irradiation is performed. Harden the dental resin. Thereafter, unnecessary portions of the hardened dental resin 150 are cut with a cutting tool (for example, a dental drill) to form a desired shape.

  Specifically, from the side of the side surface 151 that is not in contact with the target tooth 611 (the side surface on the cheek side in the case of buccal correction) to the position of the plane continuous with the right side surface of the orthodontic wire 20 in FIG. The resin 150 is cut to expose the orthodontic wire 20 from the dental resin 150. As a result, a groove 152 that engages with the orthodontic wire 20 is formed in the dental resin 150, and the orthodontic wire 20 extends from the dental resin 150 in the radial direction (in the case of buccal correction, the cheek direction). Become removable. Thereby, the bracket similar to the bracket 130 of 4th Embodiment mentioned above is created.

  Next, a portion 153 near the target tooth 611 on the upper surface of the dental resin 150 is cut downward to form a protrusion 154 on the upper surface of the dental resin 150. Further, a portion 155 near the target tooth 611 on the lower surface of the dental resin 150 is cut upward to form a protrusion 156 on the lower surface of the dental resin 150. These protrusions 154 and 156 are locking protrusions for locking a ligature wire, an O-ring or the like to the bracket, and ligate the orthodontic wire 20 engaged with the groove 152 to the bracket. Is possible.

  Next, another example of a method for producing a groove type bracket will be described. FIG. 9 is a schematic cross-sectional view for explaining the other production method, and FIG. 10 is a perspective view for explaining the shape of the mold member 160 used in the production method. FIG. 9 shows a central incisor as the target tooth 611 cut along a substantially vertical cross section along Y-Y ′ shown in FIG. 6.

  The mold member 160 is formed of a member that transmits light and ultraviolet light for resin curing. For example, when a resin that is cured by light is used, the mold member 160 is formed of a transparent member. The mold member 160 includes a recess 161 in which a female mold (opposite shape) of all or a part of a target bracket is engraved, and an opening 162 that communicates the recess 161 with the outside. The liquid resin before curing is filled in the concave portion 161 through the opening 162, and the molded resin after curing is removed from the concave portion 161 through the opening 162.

  In addition, on the inner side of the edge of the opening 162 of the mold member 160, protrusions 167 and 168 that protrude toward the center of the opening are formed. In FIG. 9, the protrusion 167 is formed as a protrusion protruding downward from the upper edge of the opening 162, and the protrusion 168 is formed as a protrusion protruding upward from the lower edge of the opening 162. ing. Thus, a protrusion 169 is formed on the upper surface of the molding resin cured in the mold member 160, and a protrusion 170 is formed on the lower surface.

  When creating the bracket, for example, the liquid resin is filled in the recess 161 to such an extent that the liquid resin comes out of the opening 162 (for example, the liquid resin slightly overflows or rises), and the side of the opening 162 faces the target tooth 800. It is made to press-contact toward the target part. Alternatively, a liquid resin is injected from a resin injection hole or the like (not shown) of the concave portion 161 in a state where the opening 162 side is in contact with the target portion of the target tooth 800, and the liquid resin is injected into the concave portion 161. Fill.

  Thereby, the liquid resin which has come out of the opening 162 adheres along the side surface of the target tooth 611. In this state, the liquid resin is cured by irradiating resin curing light or ultraviolet rays through the mold member 160 from the outside of the mold member 160, and the cured resin is removed from the mold member 160, as described in the fourth embodiment. The bracket 130 is the same type as the bracket 130. Note that if the mold member 160 is provided with a handle 163 or the like outside the mold member 160, workability related to pressing and removal of the mold member 160 is improved.

  As shown in FIG. 10, two holes 164 and 165 that penetrate the inside and outside of the mold member 160 are formed on the side surface of the mold member 160. The holes 164 and 165 are for inserting the orthodontic wire 20, and the orthodontic wire 20 inserted through the holes 164 and 165 crosses the recess 161. For this reason, when the recess 161 is filled with a liquid resin and cured, a hole or a groove is formed in a portion where the orthodontic wire 20 is present.

  That is, if the orthodontic wire 20 is inserted so as to be in contact with the bottom of the mold member 160, a bracket similar to the bracket 130 having the groove 135 according to the above-described fourth embodiment is created, and the orthodontic wire If 20 is inserted in a state where it floats from the bottom of the mold member 160, brackets similar to the brackets 10, 110, 120 having the through holes are created as in the first to third embodiments described above. . FIG. 9 illustrates a case where a groove is formed.

  The mold member 160 is formed with slits, cuts, and the like from the holes 164 and 165 toward the opening 162. With the orthodontic wire set in a predetermined position of the set-up dental model 600, the orthodontic wire The mold member 160 filled with the liquid resin 20 can be pressed toward the side surface of the target tooth so that 20 passes through the slit. In addition, after the dental resin is hardened, the dental resin with the orthodontic wire 20 hardened is fixed. By simply pulling the mold member 160 in the lateral direction of the target tooth, the dental resin is removed from the mold member 160. Is removed.

  The mold member 160 may be made of rubber. In the case of the rubber mold member 160, when the liquid resin filled in the mold member 160 is cured and a bracket having an uneven shape corresponding to the complex uneven shape of the mold member 160 is formed, the mold member The bracket can be easily removed from the mold member 160 by extending 160 to widen the opening 162.

  Specifically, for example, protrusions 167 and 168 for forming a protrusion for hooking a ligature wire, an O-ring, or the like on the bracket are formed in the recess 161 of the mold member 160 from the edge of the opening 162 to the inner diameter of the opening 162. Even if it is formed in the direction, the hardened dental resin can be easily removed from the mold member 160 by extending the opening 162.

  Since the bracket created by the bracket creation method described above is made using dental resin, material costs are greatly reduced compared to metal brackets made by conventional casting. Therefore, the manufacturing cost is greatly reduced because no high skill is required. In addition, the distance between the orthodontic wire 20 and the tooth is different for each person to be treated, but since the conventional bracket is generally used, the distance from the tooth side surface to the wire engaging portion is fixed, When the optimal shape for each treatment target was not realized, material costs and production skills were reduced, allowing dentists to create their own brackets, and optimal brackets that meet local needs Can be manufactured at low cost.

(6) Sixth embodiment:
The dentist uses the orthodontic brackets produced by the orthodontic brackets according to the first to fourth embodiments described above and the orthodontic bracket producing method according to the fifth embodiment described above. While determining the mounting position using the uneven shape formed on the engagement surface as a clue, each is adhered to the target tooth of the treatment subject, and by inserting an orthodontic wire into the through hole of each orthodontic bracket, It is possible to correct the dentition of the person to be treated with ideal teeth and corrections.

  FIG. 11 is a diagram illustrating a state in which an orthodontic bracket and an orthodontic wire are attached by the orthodontic method according to the sixth embodiment. The figure (a) has shown the state at the time of buccal correction, and the figure (b) has shown the state at the time of lingual correction.

  In the figure, the case of the upper jaw is taken as an example, but it goes without saying that the same orthodontic correction is possible for the lower jaw. In addition, the figure shows a diagram in which a through-hole type bracket is attached to the molar and a groove type bracket is attached to the canine and incisor, but a groove type bracket may be attached to the molar. A through-hole type bracket may be attached to the canine or incisor. In addition, the figure shows a view in which an orthodontic bracket formed using only the above-described dental resin is mounted, but a conventional metal orthodontic bracket is used in an appropriate combination. Also good.

  To attach the bracket to the tooth, after applying a dental adhesive to the target site of the target tooth, as described above, it is arranged at the mounting position determined using the uneven shape formed on the engagement surface as a clue. This is done by curing the adhesive for use by drying or light irradiation.

  Then, the orthodontic wire is inserted into the through hole of the bracket or engaged with the groove, and the O-ring or ligature wire is hooked and ligated. In addition, you may use the orthodontic wire inserted in the through-hole without ligating like what is called a demon system bracket.

(4) Summary:
Since the orthodontic bracket according to each of the embodiments described above is made using a dental resin, the technical level and cost necessary for manufacturing the orthodontic bracket can be reduced and orthodontic can be achieved. Such costs and labor can be reduced. In addition, since the orthodontic bracket according to each of the embodiments described above has an engagement surface that engages with the concavo-convex shape of the occlusal surface, the fixing position of the orthodontic bracket with respect to the teeth of the treatment target can be determined. In addition, it is possible to further reduce the deviation between the actual fixing position and the ideal fixing position of the orthodontic bracket with respect to the teeth of the treatment subject.

  Note that the present invention is not limited to the above-described embodiments and modifications, and the structures disclosed in the above-described embodiments and modifications are mutually replaced, the combinations are changed, the known technique, and the above-described implementations. Configurations in which the configurations disclosed in the embodiments and modifications are mutually replaced or the combinations are changed are also included. Further, the technical scope of the present invention is not limited to the above-described embodiments, but extends to the matters described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Bracket, 11 ... Engagement part, 12 ... Engagement surface, 13 ... Projection part, 14 ... Through-hole, 20 ... Orthodontic wire, 100 ... Bracket, 110 ... Bracket, 111 ... Engagement part, 112 ... First DESCRIPTION OF SYMBOLS 1 Engagement part, 113 ... 1st engagement surface, 114 ... 2nd engagement part, 115 ... Contact surface, 116 ... Projection part, 117 ... Through-hole, 120 ... Bracket, 121 ... Engagement part, 122 ... 1st DESCRIPTION OF SYMBOLS 1 Engagement part, 123 ... 1st engagement surface, 124 ... 2nd engagement part, 125 ... Contact surface, 126 ... Projection part, 127 ... Through-hole, 130 ... Bracket, 131 ... Engagement part, 132 ... Engagement Stop projection, 134 ... Locking projection, 135 ... Groove, 140 ... Bracket, 141 ... portion, 142 ... Through hole, 150 ... Dental resin, 151 ... Side face, 152 ... Groove, 153 ... Site, 154 ... Projection, 155 ... Site, 156 ... Projection, 160 ... Mold member, 161 ... Part, 162 ... opening, 163 ... handle, 164 ... hole, 165 ... hole, 167 ... protrusion, 168 ... protrusion, 169 ... protrusion, 170 ... protrusion, 200 ... target tooth, 201 ... cheek side, 202 ... lingual side, 300 ... first premolar, 301 ... buccal side, 303 ... occlusal surface, 303a ... buccal cusp, 303b ... lingual cusp, 400 ... first molar, 401 ... buccal side, 403 ... occlusal surface, 403a ... mesial buccal cusp, 403b ... centrifugal buccal cusp, 600 ... setup tooth model, 601 ... pseudogingival, 610 ... first premolar, 611 ... target tooth, 800 ... target tooth, 602-606 ... pedestal, S10: Tooth shape impression collection step, S20 ... Original tooth shape model creation step, S30 ... Setup tooth shape model creation step, S40 ... Base creation step, S50 ... Bracket creation step

Claims (16)

  An orthodontic bracket characterized by being formed of only a dental resin.   The orthodontic bracket according to claim 1, further comprising an engagement portion having an engagement surface that engages with a concavo-convex shape of a specific tooth.   The orthodontic bracket according to claim 2, wherein the engaging portion has an engaging surface that engages with at least a part of a cheek side surface or a tongue side surface of the specific tooth. The specific tooth is a molar;
The orthodontic bracket according to claim 2, wherein the engaging portion has an engaging surface that engages with an uneven shape of an occlusal surface of a molar tooth.   The orthodontic bracket according to claim 4, wherein the engagement surface engages in a concave-convex shape from a cheek side surface to an occlusal surface of the specific tooth.   6. The orthodontic bracket according to claim 4, wherein the engagement surface is engaged in a concavo-convex shape in a concavo-convex shape from a buccal side surface of the specific tooth to a buccal cusp.   The orthodontic bracket according to claim 4, wherein the engagement surface engages in an uneven shape in an uneven shape from a lingual side surface to an occlusal surface of the specific tooth.   The orthodontic bracket according to claim 4 or 7, wherein the engaging surface engages in an uneven shape in an uneven shape from a lingual side surface of the specific tooth to a lingual cusp.   The orthodontic bracket according to any one of claims 4 to 8, wherein the engaging portion includes an encircling portion that surrounds the cusp of the specific tooth.   The orthodontic bracket according to claim 9, wherein the surrounding portion surrounds a portion around the cusp of the specific tooth and excluding a portion facing a groove running through a central portion of the cusp.   The said engaging part has the wire penetration hole which can penetrate an orthodontic wire in the side surface side of the said specific tooth, The any one of Claims 1-10 characterized by the above-mentioned. Orthodontic bracket.   The orthodontic bracket according to claim 11, wherein the wire insertion hole has a funnel shape in which the diameter of the hole gradually increases as the opening is closer to the entrance.   The orthodontic bracket according to claim 11 or 12, wherein a lubricant is attached to an inner surface of the wire insertion hole.   The orthodontic bracket according to any one of claims 11 to 13, wherein a powdery material is attached to an inner surface of the wire insertion hole.   The engagement portion is formed with an engagement groove that is open toward the side surface of the specific tooth and engages with an orthodontic wire. The orthodontic bracket according to claim 10. A method for producing an orthodontic bracket according to any one of claims 1 to 15,
A method for producing an orthodontic bracket, characterized in that the orthodontic bracket is manufactured by applying and curing a dental resin on a dental model.

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