Tooth correction system for traction

Abstract

The embodiment of the utility model provides a tooth correction system for traction, which comprises an accessory used for being fixed on the lip-cheek side surface and / or the tongue side surface of a tooth and a shell-shaped body with a plurality of tooth storage cavities, and an opening structure is arranged on the tooth storage cavity wrapping the tooth where the accessory is located. The size of the opening structure is larger than or equal to the size of the accessory, and when the tooth-wearing device is worn, the accessory penetrates through the opening structure and protrudes out of the opening structure by a preset length to be used for hanging a traction piece so as to apply traction force to the teeth. Therefore, according to the tooth correction system provided by the invention, the traction force can directly act on the tooth where the accessory is located, and the accessory and the shell-shaped body are not connected, so that other teeth wrapped by the shell-shaped body can move according to an original plan under the action of the shell-shaped body; unexpected movement caused by the influence of traction force is avoided, so that the correction result is more accurate.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of oral orthodontics, and in particular to a tooth correction system for traction. Background Art

[0002] In clinical orthodontic treatment, when using shell-shaped dental braces, functional accessories are sometimes used to enhance the treatment effect. Common functional accessories include traction structures, which are used to suspend traction members so that the traction force is applied to the corresponding parts. In many cases, such as anterior tooth intrusion, tooth elongation, space adjustment, eruption traction, and tooth torsion, traction structures are required for auxiliary treatment.

[0003] In the prior art, one method is to make a small notch (i.e., a traction hook) on the edge of the tooth receiving cavity corresponding to the tooth position that needs to be pulled on the invisible braces. When wearing the braces, the traction piece is hung on the traction hook to achieve the traction piece retention, and the other side is hung on other traction hooks or lingual buckles to achieve traction between the teeth. However, when the pulling force is too large, this method will cause the edge of the braces to flip outward, forming a warped edge. Not only will the traction piece slip off, but the warped edge will also easily scratch the oral mucosa. Another method is to extend a protruding structure outward from the surface of the invisible braces away from the edge, and then make an opening on the side surface of the protruding structure for hanging the traction piece. In both of the above solutions, a traction structure for hanging traction parts is provided on the invisible braces body. However, since the invisible braces is an integral structure, even if the traction force is only applied to a part of the invisible braces body, other parts of the invisible braces will also be affected by the traction force. This will cause other teeth wrapped by the invisible braces (i.e., teeth that are not provided with corresponding traction structures) to move unexpectedly under the action of the traction force, resulting in a deviation between the correction result and the correction target.

[0004] Therefore, it is necessary to provide a dental orthodontic system that can accurately apply traction force to individual teeth that require auxiliary treatment during invisible orthodontic treatment. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a dental correction system for traction that effectively solves the above-mentioned problems, and can accurately apply traction force to individual teeth that require auxiliary treatment without affecting the designed movement of the invisible braces on other teeth, making the correction results more accurate.

[0006] To achieve the above-mentioned purpose, an embodiment of the present application provides a dental orthodontic system for traction, comprising an attachment for fixing on the labial and buccal sides and / or lingual sides of the teeth and a shell-shaped body having multiple tooth receiving cavities, wherein an opening structure is provided on the tooth receiving cavity that wraps the tooth where the attachment is located, and the size of the opening structure is greater than or equal to the size of the attachment. When worn, the attachment passes through the opening structure and protrudes from the opening structure to a predetermined length for hanging a traction member to apply traction force to the tooth.

[0007] Preferably, the predetermined length ranges from 3 mm to 8 mm.

[0008] Preferably, the side surface of the accessory for hanging the traction member is a concave surface.

[0009] Preferably, the circumference of the cross section of the attachment gradually decreases and then gradually increases along the distal tooth direction.

[0010] Preferably, a groove structure for holding the traction member is provided on the surface of the accessory for hanging the traction member.

[0011] Preferably, the width of the groove structure in the distal tooth direction is smaller than the diameter of the traction member, so that there is an interference fit between the groove structure and the traction member.

[0012] Preferably, the tooth receiving cavity that wraps the tooth where the accessory is located is also provided with a channel connected to the opening structure, and the channel extends from the edge of the tooth receiving cavity to the opening structure. When worn, the accessory enters the opening structure through the channel.

[0013] Preferably, the width of the channel in the mesiodistal direction gradually decreases from an end located at the edge of the tooth receiving cavity to an end connected to the opening structure.

[0014] Preferably, the width of the channel in the mesiodistal direction is equal from one end located at the edge of the tooth receiving cavity to one end connected to the opening structure.

[0015] Preferably, the minimum width of the channel in the mesiodistal direction is between 0.7 times and 0.9 times the maximum width of the end of the attachment adjacent to the tooth in the mesiodistal direction.

[0016] Compared with the prior art, the present invention provides a tooth correction system for traction:

[0017] The dental correction system for traction in the present application includes an accessory fixed on the surface of the tooth and a shell-shaped body with multiple tooth receiving cavities. The tooth receiving cavity is provided with an opening structure. When worn, the accessory passes through the opening structure and protrudes from the opening structure by a predetermined length for hanging a traction piece to apply traction force to the tooth where the accessory is located. That is to say, the traction force can not only act directly on the tooth where the accessory is located, but also, since there is no connection relationship between the accessory and the shell-shaped body, the other teeth wrapped in the shell-shaped body can move according to the original plan under the action of the shell body, and will not be affected by the traction force and cause unexpected movement, so that the correction result is more accurate.

[0018] In addition, the accessory also has a groove structure for accommodating and holding the traction member. The width of the groove structure in the distal tooth direction is smaller than the diameter of the traction member, so that there is an interference fit between the groove structure and the traction member. This arrangement ensures that during the correction process, the traction member can be stably fixed on the accessory, avoiding the problem of the traction member easily falling off from the accessory during the traction process, so that the traction force can be continuously and stably applied to the teeth where the accessory is located. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 is a schematic structural diagram of a dental orthodontic system for traction in some embodiments of the present application;

[0021] Figure 2 yes Figure 1 Schematic diagram of the wearing of the dental orthodontic system;

[0022] Figure 3 Schematic diagrams of wearing a dental orthodontic system in other embodiments of the present application;

[0023] Figure 4 is a schematic diagram of attachments attached to the surface of teeth in other embodiments of the present application;

[0024] Figure 5 is an enlarged schematic diagram of an attachment attached to a tooth surface in some embodiments of the present application;

[0025] Figure 6 is an enlarged schematic diagram of an attachment attached to a tooth surface in other embodiments of the present application;

[0026] Figure 7 is an enlarged schematic diagram of an attachment attached to a tooth surface in other embodiments of the present application;

[0027] Figure 8 is an enlarged schematic diagram of an attachment attached to a tooth surface in other embodiments of the present application;

[0028] Figure 9 is a schematic diagram of a shell-shaped body in some embodiments of the present application;

[0029] Figure 10 is an enlarged schematic diagram of the opening structure and the channel in some embodiments of the present application;

[0030] Figure 11 It is an enlarged schematic diagram of the opening structure and channels in other embodiments of the present application. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present application. The various embodiments can be combined with each other and referenced to each other under the premise of no contradiction.

[0032] The shell-like body is provided with a number of cavities for accommodating multiple teeth, and is divided into lingual surface and labial surface, mesial surface and distal surface. Among them, "lingual surface" is named according to the names of the various surfaces of the crown in the 2nd edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 35-36, wherein the labial surface and buccal surface are the sides of the crown of the front teeth close to the lips, called the labial surface (the labial side surface in this application has the same meaning), and the side of the crown of the back teeth close to the cheek is called the buccal surface (the buccal side surface in this application has the same meaning). The lingual surface is the side of the crown of the front teeth and the back teeth close to the tongue, collectively referred to as the lingual surface (the lingual side surface in this application has the same meaning). The mesial surface and distal surface are the two surfaces adjacent to the crown of the adjacent teeth, collectively referred to as the adjacent surfaces. The side closer to the midline of the face is called the mesial surface, and the side farther from the midline of the face is called the distal surface.

[0033] The shell-shaped appliance (corresponding to the shell-shaped body in each embodiment of the present application) is an invisible, beautiful mechanical device for orthodontic treatment produced by computer three-dimensional design. It is usually worn on the teeth in the mouth and is composed of polymer materials, such as TPU, PETG or a combination of both materials. It can generate forces to cause changes in the deformed jaw, misplaced teeth and periodontal tissues, which is beneficial to the normal growth and development of the maxillofacial region. The shell-shaped appliance uses the principles of biomechanics to correct deformed teeth. Through a correction system including a series of shell-shaped appliances, a gentle and lasting biological force is applied to slowly move the teeth, restore the teeth to their normal position, and align the teeth. During the correction process, other accessories are usually used or different structures are set on the shell-shaped appliance to apply additional correction forces to the teeth.

[0034] In the prior art, a traction structure for hanging traction members is provided on the shell-shaped orthodontic appliance body. However, since the invisible orthodontic appliance is an integral structure, even if the traction force is only applied to a part of the invisible orthodontic appliance body, other parts of the invisible orthodontic appliance will also be affected by the traction force. This will cause other teeth wrapped by the invisible orthodontic appliance (i.e., teeth that are not provided with corresponding traction structures) to move unexpectedly under the action of the traction force, resulting in a deviation between the correction result and the correction target.

[0035] Each embodiment of the present application provides a dental correction system for traction, including an attachment for fixing on the labial and buccal side and / or lingual side of the teeth and a shell-like body having a plurality of tooth receiving cavities, wherein an opening structure is provided on the tooth receiving cavity that encloses the tooth where the attachment is located, and the size of the opening structure is greater than or equal to the size of the attachment. When worn, the attachment passes through the opening structure and protrudes from the opening structure by a predetermined length for hanging a traction member to apply traction force to the tooth. Such a setting of traction force can not only directly act on the tooth where the attachment is located, but also, since there is no connection between the attachment and the shell-like body, the other teeth enclosed by the shell-like body can move as originally planned under the action of the shell-like body, and will not be affected by the traction force and cause unexpected movement, making the correction result more accurate.

[0036] The various embodiments of this application are described below with reference to the accompanying drawings.

[0037] refer to Figure 1 and Figure 2As shown, the present application provides a tooth correction system for traction, including an attachment 1 for fixing on the labial and buccal side of the tooth and a shell-shaped body 2 with a plurality of tooth receiving cavities. It is understandable that the attachment 1 can also be fixed on the lingual side of the tooth, or a plurality of attachments 1 are partially fixed on the labial and buccal side and partially fixed on the lingual side. The number of the plurality of tooth receiving cavities can be set according to the number of partial teeth of a single jaw or the number of all teeth of a single jaw according to the correction requirements. The attachment 1 has a bonding bottom surface. During use, the bonding bottom surface of the attachment 1 needs to be bonded to the labial and buccal side and / or the lingual side of the tooth. It is understandable that in order to make the attachment 1 easier to bond to the tooth surface during clinical operation and to ensure the bonding stability during subsequent use, the bonding bottom surface is a curved surface that matches the curvature of the tooth surface. Among them, the tooth receiving cavity 21 that wraps the tooth where the accessory 1 is located is provided with an opening structure 22. The size of the opening structure 22 is greater than or equal to the size of the accessory 1, that is, the characteristic diameter of the opening structure is greater than or equal to the characteristic diameter of the accessory. It can be understood that when the shape of the opening structure is consistent with the cross-sectional shape of the accessory, the characteristic diameter of the largest cross-section of the accessory is greater than or equal to the characteristic diameter of the opening structure; when the shape of the opening structure is inconsistent with the cross-sectional shape of the accessory, the characteristic diameter of the largest cross-section of the accessory is greater than the characteristic diameter of the opening structure. Therefore, when the accessory 1 is worn, it passes through the opening structure 22, and the opening structure 22 does not exert force on the accessory 1. The size of the tooth receiving cavity 21 that wraps the tooth where the accessory 1 is located can be greater than the size of the wrapped tooth. There is a gap between the tooth receiving cavity 21 and the tooth on one side of the traction direction, so that when the tooth is subjected to traction, it can move to the gap and is not restricted by the tooth receiving cavity 21.

[0038] In some embodiments, the predetermined length ranges from 3 mm to 8 mm. Figure 3As shown, the attachment 1 protrudes from the opening structure 22 by a predetermined length, which is the height H1 of the attachment 1 protruding from the bonding bottom surface toward the distal tooth. H1 is between 3 mm and 8 mm. This is because the shell body 2 itself has a certain thickness, generally between 0.5 mm and 2 mm. Therefore, the height of the attachment 1 in the protruding direction needs to be greater than the thickness of the shell body 2. In other words, the attachment 1 needs to extend beyond the surface of the shell body 2 where the opening structure 22 is located, and the protruding portion needs to have space for the traction member to be suspended. Therefore, H1 needs to be set to be greater than or equal to 3 mm. In addition, the protruding height of the attachment 1 should not be too high, otherwise it may cause discomfort to the patient during the correction process. After research, the inventors of this application found that a height of the attachment 1 protruding from the tooth surface of less than or equal to 8 mm is within the acceptable range for patients. It is understood that the predetermined length range can vary when the attachment 1 is placed on different surfaces of the teeth in different areas. For example, when attachment 1 is placed on the labial side of an anterior tooth, the distance between the labial side of the anterior tooth and the lips is relatively close. To reduce the discomfort caused by friction between attachment 1 and the lips, the predetermined length may be in the range of 3mm-5mm. Alternatively, when attachment 1 is placed on the buccal side of a posterior tooth, the protrusion height of attachment 1 may be set to be greater than when it is placed on the anterior tooth, because there is a buccal corridor between the posterior tooth and the buccal side of the face, i.e., there is sufficient width between the buccal side of the posterior tooth and the buccal side of the face. Furthermore, posterior teeth have multiple roots, and the movement of posterior teeth requires a greater traction force. In order to allow multiple traction members or traction members with a thicker cross-section to be suspended on attachment 1 to apply greater traction force, the protrusion height H1 of attachment 1 is between 4mm and 8mm.

[0039] In some embodiments, the side surface of the attachment 1 for hanging the traction member is a concave surface. The advantage of this arrangement is that the concave portion can limit the movement of the traction member on the attachment 1 during the traction process, and can stably maintain it in the concave area, thereby providing a stable traction force. Figure 4 As shown, the concave surface 11 of the attachment is the side surface away from the gum. It is understood that the overall shape of the attachment 1 is a cylinder, a frustum, a prism, or a truncated pyramid. When the side surface of the traction portion is a truncated pyramid surface, the concave surface can be the mesial surface, the distal surface, the surface close to the tooth gum, or the surface away from the gum of the truncated pyramid. The specific setting can be based on different correction methods.

[0040] Further preferred, continue to refer to Figure 4As shown, the circumference of the cross section of the attachment 1 gradually decreases and then gradually increases in the distal tooth direction, so that the concave area on the side surface of the attachment 1 is not located at the two ends of the attachment 1, but is located in the middle part of the attachment 1 along the long axis direction. The advantage of this arrangement is that during the traction process, the traction member remains in the middle part of the attachment 1 and can maintain a certain distance from the shell-like body 2, which will not cause the traction member to abut against the shell-like body 2 and affect the correction effect of the shell-like body 2. In addition, the traction member is not suspended at the free end of the attachment 1, avoiding the problem of easy falling off.

[0041] Further preferably, reference Figure 5 As shown, the height H2 of the lowest point A of the inner concave portion in the convex direction does not exceed 1 / 2 of the height H1 of the attachment 1 in the convex direction. The lowest point A of the inner concave portion is positioned closer to the shell-shaped body 2. This arrangement allows the traction force to be closer to the teeth after the traction member is suspended, thus preventing the traction force from being generated away from the teeth along the long axis of the attachment 1, which could cause undesirable rotation of the teeth.

[0042] In some embodiments, reference Figure 6 and Figure 7 As shown, the surface of the accessory 1 for hanging the traction member is provided with a groove structure for holding the traction member. The distance between the opposite parts 12a and 12b of the groove structure determines the width W1 of the groove structure in the distal direction. It can be understood that in one embodiment, referring to Figure 6 As shown, the distance between the opposite parts 12a, 12b is reduced to close, in another embodiment, reference Figure 7 As shown, the width of the groove structure at the farthest end 121 is W2, and the width of the groove structure at one end adjacent to the outer surface of the accessory 1 is W3. Preferably, the width W3 may be greater than the width W2. That is, the groove structure gradually narrows from the width W3 at one end 122 adjacent to the outer surface of the accessory 1 to the width W2 at the farthest end 121. For example, the ratio of the width W3 to the width W2 may be approximately 2:1, 3:1, 4:1, or any ratio between the above values. In another preferred embodiment, referring to Figure 8 As shown, one end 122 of the groove structure adjacent to the outer surface of the accessory 1 is closer to the teeth than the farthest end 121 of the groove structure. The advantage of this arrangement is that during the traction process, a limiting structure is formed at the farthest end 121 of the groove structure to prevent the traction part from falling off the accessory 1.

[0043] Further preferably, reference Figures 6 to 8As shown in , the width of the groove structure in the distal tooth direction is smaller than the diameter of the traction member, so that there is an interference fit between the groove structure and the traction member. Specifically, it means that the width of the groove structure in the distal tooth direction from one end 122 adjacent to the outer surface of the attachment 1 to the farthest end 121 is smaller than the diameter of the traction member. It can also be that the width of the farthest end 121 of the groove structure (i.e., the final clamping position of the traction member) is smaller than the diameter of the traction member. After a certain deformation, the traction member is clamped into the farthest end 121 of the groove structure, so that there is an interference fit between the traction member and the farthest end 121 of the groove structure. In clinical practice, traction members are generally made of materials with strong elastic deformation capabilities, such as rubber rings of different diameters. When the traction member is clamped in the groove structure, the interference fit between the two can effectively avoid the problem of the traction member easily falling off the attachment 1 during the traction process, so that the traction force can be continuously and stably applied to the tooth where the attachment 1 is located.

[0044] In some embodiments, reference Figure 9 As shown, the tooth receiving cavity 21 that wraps the tooth where the accessory 1 is located is also provided with a channel 23 connected to the opening structure 22. The channel 23 extends from the edge of the tooth receiving cavity 21 to the opening structure 22. When worn, the accessory 1 enters the opening structure 22 through the channel 23. Since the accessory 1 itself has a certain protruding height, if the protruding height of the accessory 1 is too large, that is, the elastic deformation space of the shell-like body 2 cannot meet the requirement for the accessory 1 to enter the opening structure 22 when worn, forced wearing will damage the shell-like body 2. Therefore, the channel 23 extending from the edge of the tooth receiving cavity 21 to the connecting opening structure 22 can well solve the above problem. It can be understood that, with reference to Figure 10 As shown, in one case, the width W4 of the channel in the mesiodistal direction gradually decreases from one end 231 located at the edge of the tooth receiving cavity 21 to one end 232 connected to the opening structure 22. Specifically, the width of the channel near the edge of the tooth receiving cavity 21 can be greater than the maximum width of the end of the accessory 1 adjacent to the tooth in the mesiodistal direction, so that it is convenient for the accessory 1 to enter the channel during wearing; the width of the channel near the opening structure 22 can be less than the maximum width of the end of the accessory 1 adjacent to the tooth in the mesiodistal direction. Preferably, the width of the channel near the opening structure 22 is between 0.7 times and 0.9 times the maximum width of the end of the accessory 1 adjacent to the tooth in the mesiodistal direction, that is, the minimum width of the channel in the mesiodistal direction is between 0.7 times and 0.9 times the maximum width of the end of the accessory 1 adjacent to the tooth in the mesiodistal direction, so that when the accessory 1 passes through the channel, the channel near the opening structure 22 undergoes elastic deformation, and after the accessory 1 enters the opening structure 22, the channel returns to its initial state, so that the accessory 1 is not easy to detach from the channel after passing through the channel and entering the opening structure 22. Reference Figure 11As shown, in another embodiment, the mesiodistal width W5 of the channel is constant from one end 231 located at the edge of the tooth-receiving cavity 21 to the end 232 connected to the opening structure 22. The mesiodistal width of the channel is between 0.7 and 0.9 times the maximum mesiodistal width of the end of the accessory 1 adjacent to the tooth. When the accessory 1 passes through the channel, the entire channel undergoes elastic deformation. After the accessory 1 enters the opening structure 22, the channel returns to its initial state, making it difficult for the accessory 1 to escape from the channel after passing through the channel and entering the opening structure 22. This design can further reduce the opening area of ​​the accessory 1 corresponding to the tooth-receiving cavity 21, thereby increasing the area of ​​the tooth-receiving cavity 21 that covers the tooth. In some cases, the accessory 1 and the channel are inserted perpendicularly, or the long axis of the channel can be angled relative to the vertical, resulting in an angled lateral insertion between the accessory 1 and the channel. The above two insertion methods can be selected based on the location of the accessory 1 and the channel.

[0045] The attachment 1 in each embodiment of the present application can be made of ceramic or resin. When the attachment 1 is not used to suspend the traction member, it can cooperate with other shell-shaped appliances to assist in other tooth movement or to improve the retention of the shell-shaped appliance on the teeth. Specifically, the shell-shaped appliance has a cavity for accommodating the attachment 1. When worn, the position of the cavity and the attachment 1 are misaligned, thereby causing the tooth where the attachment 1 is located to move. Similarly, when the position of the cavity and the attachment 1 are not misaligned, the attachment 1 serves as a retaining attachment and is used to enhance the retention of the shell-shaped appliance on the teeth.

[0046] It should be noted that the above embodiments can be freely combined as needed to form different new implementation plans without causing any contradiction. The implementation plans formed by such combination are all within the scope of protection of the present utility model. In order to save the length of the application text, they will not be repeated here.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

[0048] Similarly, the above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A dental correction system for traction, characterized in that: It includes an attachment for fixing on the labial and buccal side and / or lingual side of the teeth and a shell-shaped body with multiple tooth receiving cavities, wherein the tooth receiving cavity that wraps the tooth where the attachment is located is provided with an opening structure, and the size of the opening structure is greater than or equal to the size of the attachment. When worn, the attachment passes through the opening structure and protrudes from the opening structure to a predetermined length for hanging a traction piece to apply traction force to the teeth.

2. The dental orthodontic system according to claim 1, wherein: The predetermined length ranges from 3 mm to 8 mm.

3. The dental correction system according to claim 1, wherein: The side surface of the accessory used for hanging the traction member is a concave surface.

4. The dental correction system according to claim 3, wherein: The perimeter of the cross section of the attachment gradually decreases and then gradually increases along the distal tooth direction.

5. The dental correction system according to claim 1 or 3, characterized in that: The surface of the accessory used for hanging the traction piece is provided with a groove structure for holding the traction piece.

6. The dental correction system according to claim 5, wherein: The width of the groove structure in the distal tooth direction is smaller than the diameter of the traction member, so that the groove structure and the traction member are in interference fit.

7. The dental orthodontic system according to claim 1, wherein: The tooth receiving cavity that wraps the tooth where the accessory is located is also provided with a channel connected to the opening structure. The channel extends from the edge of the tooth receiving cavity to the opening structure. When worn, the accessory enters the opening structure through the channel.

8. The dental correction system according to claim 7, wherein: The width of the channel in the mesiodistal direction gradually decreases from one end located at the edge of the tooth receiving cavity to one end connected to the opening structure.

9. The dental orthodontic system according to claim 7, wherein: The width of the channel in the mesiodistal direction is equal from one end located at the edge of the tooth receiving cavity to one end connected to the opening structure.

10. The dental orthodontic system according to claim 8 or 9, characterized in that: The minimum width of the channel in the mesiodistal direction is between 0.7 times and 0.9 times the maximum width of the end of the attachment adjacent to the tooth in the mesiodistal direction.

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