Orthodontic appliance

Abstract

The orthodontic appliance comprises a main body part and a traction part, the main body part comprises a bottom plate, a base and a cover body, the base is provided with a groove, the groove divides the base into a first end part and a second end part, the first end part and the second end part are respectively provided with a bracket wing, a first groove is formed between the bracket wing and the bottom plate, the cover body is movably connected with the second end part, and the traction part is movably connected with the bottom plate. The traction part is provided with a fixed end and a suspended end, the fixed end of the traction part is fixedly connected with the first end part, the suspended end of the traction part is suspended, a smooth curved surface is formed by the top surface of the traction part and the top surface of the first end part, and a second groove is formed in the bottom surface, back to the top surface of the traction part, of the traction part; the traction part top face and the traction part bottom face are connected through a mesial side face and a distal side face, and a second groove penetrates through the mesial side face and the distal side face. According to the scheme, the top surface of the traction part and the top surface of the first end part form a smooth curved surface, so that the comfort can be improved; and meanwhile, a second groove is formed, so that the risk that a traction object accidentally falls off can be reduced.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an orthodontic appliance. Background Technology

[0002] With the improvement of people's living standards, the demand for obtaining and maintaining correct occlusion, improving facial aesthetics, and enhancing oral hygiene is becoming increasingly strong. Consequently, the development of orthodontic appliances for correcting teeth is also improving, but competition is also becoming increasingly fierce.

[0003] In related technologies, orthodontic appliances typically include brackets and a cover detachably connected to the brackets, with traction hooks attached to the brackets. For example, a biomechanical self-ligating bracket in patent publication CN116898601A has traction hooks fixedly connected to the side wall of the bracket body. However, these traction hooks can easily cause a foreign body sensation during use, which is detrimental to improving user experience and wearing comfort. Furthermore, existing technologies do not specifically design traction hooks; during orthodontic treatment, the traction material on the hook may detach during use, failing to meet the traction needs of doctors in different scenarios and thus affecting the orthodontic correction effect. Therefore, designing an orthodontic bracket that is highly comfortable, provides a good user experience, prevents the traction material from easily detaching during use, and can adapt to different usage scenarios has become a pressing technical problem to be solved in the existing technology. Utility Model Content

[0004] This utility model provides an orthodontic appliance that makes it less likely for users to experience a foreign body sensation during use, thus improving user experience and wearing comfort. Furthermore, the traction device will not easily fall off the traction hook during use, improving the orthodontic correction effect and solving the problems existing in the prior art.

[0005] The first aspect of this utility model provides an orthodontic appliance, the technical solution of which is as follows:

[0006] The main body includes a base plate, a base and a cover. The base is provided with a groove for installing the bow wire. The groove divides the base into a first end and a second end. Both the first end and the second end have a bracket wing. A first groove is formed between the bracket wing and the base plate.

[0007] The cover is movably connected to the second end and is used to open or close the groove;

[0008] The traction part has a fixed end and a suspended end. The fixed end of the traction part is fixedly connected to the first end, and the suspended end of the traction part is suspended. The top surface of the traction part and the top surface of the first end form a smooth curved surface.

[0009] The traction part has a second groove on the bottom surface of the traction part facing away from the top surface of the traction part. The top surface of the traction part and the bottom surface of the traction part are connected through the near-middle side and the far-middle side, and the second groove passes through the near-middle side and the far-middle side.

[0010] In use, the orthodontic appliance of this invention is fixed to the teeth via a base plate. The base plate has a base with a groove for mounting the archwire. The groove divides the base into a first end and a second end. Both the first and second ends have bracket wings. A first groove is formed between the bracket wings and the base plate. The bracket wings cooperate with the first groove for ligating the archwire to secure it to the orthodontic appliance. A cover is movably connected to the second end. Moving the cover opens or closes the groove. Specifically, during orthodontic treatment, the cover is first moved to open the groove, then the archwire is placed in the groove. Moving the cover closes the groove, thus confining the archwire within it.

[0011] In addition, the traction unit has a fixed end and a suspended end. The fixed end of the traction unit is fixedly connected to the first end. The fixed end of the traction unit can be directly fixedly connected to the first end, or it can be fixedly connected to the bracket wings on the traction unit. The suspended end of the traction unit is suspended. During orthodontic treatment, traction objects (such as elastic objects like rubber chains, rubber bands, or traction elastics) are used to pull the suspended end to move the teeth, thereby improving the orthodontic treatment effect. The top surface of the traction unit forms a smooth curved surface with the top surface of the first end, which can reduce the feeling of foreign objects during use and reduce the friction between the oral mucosa and the top surface of the traction unit, thus providing user comfort. The smooth curved surface can be interpreted as the top surface of the traction unit and the top surface of the first end being smoothly connected. Markings on the top surface of the traction unit that do not affect the patient's wearing comfort, such as protruding axial tilt lines, recessed axial tilt lines, protruding axial tilt markings, and recessed axial tilt markings, are also considered smooth curved surfaces. In addition, when the top surface of the traction unit has slight unevenness due to processing or other reasons, and the height of the protruding and recessed parts relative to the overall height of the top surface of the traction unit does not exceed 0.12mm, it is also considered a smooth curved surface.

[0012] The traction unit has a second groove on its bottom surface opposite to the top surface. The top surface and bottom surface of the traction unit are connected by a mesial side and a distal side. The second groove extends through the mesial side and the distal side. During orthodontic treatment, the traction object (such as a rubber chain, rubber band, or other elastic object) is inserted into the second groove and pulled by force. Under the action of the second groove, the traction object is confined within the groove and will not easily slip off the traction unit, reducing the risk of accidental slippage. At the same time, under the continuous and stable traction of the traction object, the orthodontic effect of the orthodontic appliance is improved.

[0013] Furthermore, the height of the top surface of the traction part in the labial-lingual direction does not exceed the top surface of the first end, that is, the top of the bracket wing tends to descend as a whole towards the top surface of the traction part, gradually approaching the base plate, thereby reducing the user's scraping and foreign body sensation during orthodontic treatment.

[0014] Furthermore, the suspended end of the traction unit extends mesially and / or distally to form an extension, and a third groove is formed between the extension and the bracket wing of the first end. The extension formed by the suspended end of the traction unit extending mesially and / or distally can reduce the scraping and foreign body sensation caused by the suspended end of the traction unit during wear. In addition, the third groove formed between the extension and the bracket wing of the first end allows the traction object (such as a rubber chain, rubber band, or other elastic object) to enter the third groove and be pulled by force during orthodontic treatment. Under the action of the third groove, the traction object is confined within the third groove, preventing it from easily slipping off the traction unit, further reducing the risk of slippage.

[0015] Furthermore, the outer contours of the ends of the extension and the suspended end of the traction portion are arc-shaped along the gingival direction.

[0016] Furthermore, the outer contours of the ends of the extension and the suspended end of the traction part are arc-shaped along the lip direction.

[0017] Furthermore, both the mesial and distal surfaces are smoothly connected to the top and bottom surfaces of the traction unit. This smooth connection reduces friction between the traction component and the traction unit during the traction process, preventing breakage of the traction component. Simultaneously, increasing the smoothness between the surfaces further reduces irritation to the oral mucosa.

[0018] Furthermore, the cross-sectional profile of the second groove is a semicircle, a parabola, a semi-ellipse, or several interconnected straight lines or curves. When different types of traction objects are used, or when the thickness of the traction object varies and the required traction force differs, the cross-section of the second groove can be adaptively designed to better accommodate the traction object and reduce the risk of accidental slippage.

[0019] Furthermore, the point closest to the gingiva in the second groove is defined as A, that is, the point closest to the gingiva in the gingival direction of the second groove is point A, and the point closest to the lip in the second groove is defined as B. The point closest to the occlusal direction is defined as C, that is, the point closest to the occlusal direction of the second groove in the gingival direction of the second groove is point C. The distance between points A and B in the labial-lingual direction is H, and the distance between points A and C in the gingival-occlusal direction is S. Where 0.1mm≤H≤0.8mm and 0.2mm≤S≤1.2mm, when H<0.1mm or S<1.2mm, the traction device may not be able to be completely inserted into the second groove, increasing the risk of the traction device slipping off the traction part. When H>0.8mm or S>1.2mm, the size of the traction part may be too large, or even cause the overall size of the orthodontic appliance to be too large, thereby affecting the user's experience.

[0020] Furthermore, where 0.4mm≤H<0.5mm or 0.5mm≤H≤0.65mm or 0.65mm<H≤0.75mm; and where 0.3mm≤S<0.4mm or 0.4mm≤S≤0.6mm or 0.6mm<S≤0.7mm, doctors can select brackets with suitable H and S values ​​according to the traction needs or the selection of different types of traction devices, thereby further improving the orthodontic effect and reducing the risk of accidental dislodgement of the traction device.

[0021] The top surface of the traction part of the orthodontic appliance of this invention forms a smooth curved surface with the top surface of the first end. In particular, the top surface of the traction part does not exceed the top surface of the bracket wing in the lip-tongue direction, which can greatly improve the user's experience and comfort. At the same time, a second groove is provided on the bottom surface of the traction part facing away from the top surface of the traction part, which can reduce the risk of the traction material accidentally falling off during the use of the bracket and improve the effect of orthodontic treatment. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the orthodontic appliance according to the first embodiment of Example 1.

[0025] Figure 2 for Figure 1 The orthodontic appliance shown is a sectional view after being partially cut along the section line.

[0026] Figure 3 This is a three-dimensional structural diagram of the orthodontic appliance according to the second embodiment of Example 1.

[0027] Figure 4 for Figure 3 Front view of the orthodontic appliance shown.

[0028] Figure 5 for Figure 3 Side view of the orthodontic appliance shown.

[0029] Figure 6 This is a three-dimensional structural diagram of the orthodontic appliance according to the third embodiment in Example 1.

[0030] Figure 7 This is a three-dimensional structural diagram of the orthodontic appliance according to the fourth embodiment in Example 1.

[0031] Figure 8 This is a three-dimensional structural diagram of the orthodontic appliance according to the fifth embodiment in Example 1.

[0032] Figure 9 This is a three-dimensional structural diagram of the orthodontic appliance according to the sixth embodiment in Example 1.

[0033] Figure 10 This is a three-dimensional structural diagram of the orthodontic appliance according to the seventh embodiment in Example 1.

[0034] Figure 11 for Figure 10 Side view of the orthodontic appliance shown.

[0035] Figure 12 for Figure 11 An enlarged view of part A in the side view shown.

[0036] Figure 13 This is a side view of the orthodontic appliance according to the eighth embodiment in Example 1.

[0037] Figure 14 for Figure 13 An enlarged view of part B in the side view shown.

[0038] Figure 15 This is a three-dimensional structural diagram of the orthodontic appliance according to the ninth embodiment in Example 1.

[0039] Figure 16 This is a cross-sectional view of the orthodontic appliance according to the ninth embodiment in Example 1.

[0040] Figure 17 for Figure 16 An enlarged view of section C in the sectional view shown. Detailed Implementation

[0041] It should be noted that the orthodontic appliances mentioned in this utility model refer to orthodontic brackets or buccal tubes, or other orthodontic appliances with similar functions and structures.

[0042] Unless otherwise stated, the following structural description requires the use of a frame of reference for the maxillary teeth to describe embodiments of the present invention. Therefore, as used herein, terms such as labial, lingual, mesial, distal, occlusal, and gingival, used to describe orthodontic appliances, are relative to the selected frame of reference. However, embodiments of the present invention are not limited to the selected frame of reference and the terms described, as orthodontic appliances can be used with other teeth in the oral cavity and in other directions.

[0043] For example, brackets or buccal tubes can also be coupled to the lingual surface of the teeth and fall within the scope of this invention. Those skilled in the art will recognize that the descriptive terms used herein may not be directly applicable when there are changes in the frame of reference. However, embodiments of this invention are intended to be independent of position and orientation within the oral cavity, and the related terminology used to describe the embodiments is merely to provide clear illustration of the embodiments in the drawings. Similarly, the related terms labial, lingual, mesial, distal, occlusal, and gingival in no way limit this invention to a particular position or orientation.

[0044] The terms labial, lingual, mesial, distal, occlusal, and gingival are industry terms used in orthodontic treatment. Taking an upper jaw tooth as an example, the tooth surface can be roughly divided into six surfaces. The surface of the tooth that occludes with the lower jaw teeth is the occlusal surface; the surface of the tooth that connects to the attached gingival tissue is the gingival surface; the occlusal and gingival surfaces are opposite each other, and the direction formed by the occlusal and gingival surfaces is also called the gingio-occlusal direction. The surface of the tooth facing the lips is the labial surface, and the surface of the tooth facing the tongue is the lingual surface; the labial and lingual surfaces are opposite each other, and the direction formed by the labial and lingual surfaces is also called the labiolingual direction. The two surfaces of the tooth that contact adjacent teeth are the mesial and distal surfaces, distinguished by their distance from the center; the direction formed by the two surfaces is also called the mesiodistal direction, or mesiodistal direction. Furthermore, in the description of direction, the labiolingual direction generally refers to two directions, while the labiolingual direction specifically refers to a single direction, that is, the direction from the labial surface to the lingual surface, thus distinguishing them.

[0045] To better understand the orthodontic appliance of this application, the following description is provided in conjunction with the accompanying drawings.

[0046] 1. Main body; 2. Traction part; 11. Base plate; 12. Base; 13. Cover; 121. First end; 122. Second end; 123. Support wing; 124. First groove; 21. Fixed end; 22. Suspended end; 23. Second groove; 221. Extension; 222. Third groove.

[0047] Example 1

[0048] like Figures 1 to 14 As shown, an orthodontic appliance includes a main body 1 and a traction part 2. The main body 1 includes a base plate 11, a base 12, and a cover 13. The base 12 can be welded to the base plate 11 or integrally formed with the base plate 11. The base 12 is provided with a groove for installing the archwire, which divides the base 12 into a first end 121 and a second end 122. Both the first end 121 and the second end 122 have bracket wings 123. A first groove 124 is formed between the bracket wings 123 and the base plate 11. The bracket wings 123 cooperate with the first groove 124 for ligating the archwire to fix it to the orthodontic appliance.

[0049] The cover 13 is movably connected to the second end 122 and is used to open or close the groove. Specifically, the cover 13 has a closed state (closing the groove) and an open state (opening the groove). During orthodontic treatment, the cover 13 is first moved to open the groove, then the archwire is placed in the groove, and the cover 13 is moved to the closed state (closing the groove). The cover 13 covers the groove, thus confining the archwire within the groove. In this embodiment, a slide rail can be provided on the cover 13, and a groove can be provided on the top of the second end 122, thereby achieving a movable connection between the cover 13 and the second end 122. In other embodiments, the cover 13 can also be movably connected to the second end 122 through a hinge or other means, which is not limited here.

[0050] like Figure 1-2 As shown, the traction unit 2 has a fixed end 21 and a suspended end 22. The fixed end 21 of the traction unit 2 is fixedly connected to the first end 121. In this embodiment, the fixed end 21 of the traction unit 2 can be directly fixedly connected to a portion of the bracket wing 123 on the first end 121 that is not part of the bracket. In other embodiments, the fixed end 21 of the traction unit 2 can also be directly fixedly connected to the bracket wing 123 on the first end 121. The suspended end 22 of the traction unit 2 is suspended, and the top surface of the traction unit 2 forms a smooth curved surface with the top surface of the first end 121, which can reduce irritation and damage to the oral mucosa and improve comfort. The smooth curved surface can be interpreted as the top surface of the traction unit 2 being smoothly connected to the top surface of the first end 121.

[0051] In the first embodiment of this example, as Figure 1 , 2 As shown, the top surface of the traction part 2 is tangent to the top surface of the first end 121, forming a completely smooth curved surface.

[0052] In the second embodiment of this example, as Figure 3-5 As shown, at the junction of the top surface of the traction part 2 and the top surface of the first end 121, the angle between the tangent of the top surface of the traction part 2 and the tangent of the top surface of the first end 121 is α. When 0 < α < 45°, that is, when the angle between the top surface of the traction part 2 and the top surface of the first end 121 is small, the structure will not cause damage to the oral mucosa of the user, reduce the stimulation and damage of the orthodontic appliance to the oral mucosa during the user's wearing process, and improve comfort.

[0053] In the third embodiment of this example, as Figure 6 As shown, a recessed axial tilt line is provided on the top surface of the traction part 2. The recessed axial tilt line serves as an axial tilt indicator and will not affect the patient's wearing comfort. This embodiment belongs to a smooth curved surface and is within the protection scope of this application.

[0054] In the fourth embodiment of this example, such as Figure 7As shown, a protruding tilt line is provided on the top surface of the traction part 2. The protruding tilt line serves as a tilt indicator and will not affect the patient's wearing comfort. This embodiment belongs to a smooth curved surface and is within the protection scope of this application.

[0055] In the fifth embodiment of this example, as Figure 8 As shown, the top surface of the traction part 2 is provided with a protruding tilt mark, which will not affect the patient's wearing comfort. This embodiment belongs to a smooth curved surface and is within the protection scope of this application.

[0056] In the sixth embodiment of this example, such as Figure 9 As shown, a recessed tilt mark is provided on the top surface of the traction part 2. The recessed tilt mark does not affect the patient's wearing comfort. This embodiment belongs to a smooth curved surface and is within the protection scope of this application.

[0057] In the seventh embodiment of this example, such as Figure 10-12 As shown, when the top surface of the traction part 2 has slight unevenness due to processing or other reasons, the distance between the protruding part and the whole top surface of the traction part 2 is L1, and the distance between the concave part and the whole top surface of the traction part 2 is L2. When both L1 and L2 do not exceed 0.12mm, they are also considered smooth curved surfaces.

[0058] The traction part 2 has a second groove 23 on its bottom surface opposite to the top surface of the traction part 2. The top surface of the traction part 2 and the bottom surface of the traction part 2 are connected through the mesial side and the distal side. The second groove 23 runs through the mesial side and the distal side. During orthodontic treatment, when the traction object (such as a rubber chain, rubber band, traction elastic band, or other elastic object) enters the second groove 23 and is pulled by force, the traction object is restricted within the second groove 23 and will not easily slip off the traction part 2, thereby reducing the risk of the traction object slipping off. At the same time, under the continuous and stable traction of the traction object, the orthodontic correction effect of the orthodontic appliance is improved.

[0059] like Figure 1-16 As shown, the top surface of the traction part 2 does not exceed the top surface of the first end 121 in the labial-lingual direction, and the trend from the fixed end 21 of the traction part to the suspended end 22 of the traction part is downward as a whole, gradually approaching the base plate 11, thereby reducing the scraping and foreign body sensation when the user wears the orthodontic appliance during the orthodontic process, and improving the comfort of using the orthodontic appliance.

[0060] In the eighth embodiment of this example, even if there are undulations on the top surface of the traction part 2, the two ends of the smooth arc surface are connected, and the protrusion distance L3 from the smooth arc surface to the connecting line is measured. As long as 0 < L3 < 1 mm, it means that the protrusion on the top of the traction part 2 will not affect the patient's user experience, and the height of the top surface of the traction part 2 in the lip and tongue direction does not exceed the top surface of the first end 121. The traction part 2 as a whole has a downward trend, and should all fall within the protection scope of this application.

[0061] In the ninth embodiment of this example, such as Figure 15 As shown, the suspended end 22 of the traction unit extends towards the mesial and distal sides to form an extension 221. Two third grooves 222 are formed between the extension 221 and the bracket wing 123 of the first end 121. The extension 221 formed by the suspended end 22 of the traction unit extending towards the mesial and distal sides makes the overall shape of the orthodontic appliance more rounded, and at the same time reduces the scraping and foreign body sensation of the suspended end 22 of the traction unit 2 during the user's wearing process. Furthermore, the third groove 222 formed between the extension 221 and the bracket wing 123 of the first end 121 allows traction objects (such as elastic objects like rubber chains, rubber bands, or traction elastics) to enter and be pulled by the traction part 2 during orthodontic treatment. Under the action of the third groove 222, the traction object is confined within the third groove 222, preventing it from easily slipping off the traction part 2 and further reducing the risk of slippage. At the same time, it can also meet the traction needs in various directions, easily satisfying different traction scenarios for doctors, including oblique traction needs with a certain angle to the mesiodistal direction.

[0062] In some embodiments, the outer contours of the ends of the extension 221 and the suspended end 22 of the traction portion 2 are arc-shaped along the gingival-maxillary direction. In some other embodiments, the outer contours of the ends of the extension 221 and the suspended end 22 of the traction portion 2 are arc-shaped along the labial-lingual direction. By making the outer contours of the ends of the extension 221 and the suspended end 22 of the traction portion 2 arc-shaped along the gingival-maxillary direction and / or along the labial-lingual direction, irritation to the patient's oral cavity can be further reduced.

[0063] In some implementations, such as Figure 1-17 As shown, both the mesial and distal surfaces are smoothly connected to the top and bottom surfaces of the traction unit 2. During orthodontic treatment, the traction object (such as a rubber chain, rubber band, or traction elastic band) enters the second groove 23 and is pulled by force. The traction object is confined within the second groove 23. Friction may occur at the junctions between the traction object and each surface. By making both the mesial and distal surfaces smoothly connected to the top and bottom surfaces of the traction unit 2, the friction between the traction object and the traction unit 2 can be reduced, avoiding the risk of breakage of the traction object. At the same time, increasing the smoothness between each surface can reduce irritation to the oral mucosa.

[0064] In some implementations, such as Figure 1-17 As shown, the cross-section of the second groove 23 can be set to a semi-circle. By setting the second groove 23 to a semi-circle, the traction object can be confined within the second groove 23 during the traction process, and the traction object will not easily slip off the traction part 2, reducing the risk of the traction object slipping off. In other embodiments, the cross-sectional profile of the second groove 23 can also be a parabola, a semi-ellipse, or several interconnected straight lines or curves, as long as it can form the second groove 23 to accommodate the traction member, there is no limitation here.

[0065] In some implementations, such as Figure 16-17 As shown, the point of the second groove 23 closest to the gingiva in the gingival direction is defined as A, that is, the point of the second groove 23 closest to the gingiva in the gingival-maxillary direction is defined as point A, the point of the second groove 23 closest to the lip is defined as B, and the point of the second groove 23 closest to the maxillary direction is defined as C, that is, the point of the second groove 23 closest to the maxillary direction in the gingival-maxillary direction is point C; the distance between points A and B in the labial-lingual direction is H, and the distance between points A and C in the gingival-maxillary direction is S, where 0.1mm≤H≤0.8mm, 0.2mm≤S≤1.2mm.

[0066] In some other implementations, the value of H ranges from 0.4mm to 0.5mm, or 0.5mm to 0.65mm, or 0.65mm to 0.75mm; the value of S ranges from 0.3mm to 0.4mm, or 0.4mm to 0.6mm, or 0.6mm to 0.7mm. Doctors can select brackets with suitable H and S values ​​based on the traction needs or the selection of different types of traction devices, thereby improving orthodontic results and reducing the risk of accidental dislodgement of the traction device.

[0067] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0069] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0070] It should be noted that when a component is described as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable. Examples include socketing, snap-fitting, integral molding, and welding, which are feasible in conventional technologies and will not be elaborated upon here.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application.

Claims

1. An orthodontic appliance, characterized in that, include: Main body and traction unit, The main body includes a base plate, a base and a cover. The base is provided with a groove for installing the bow wire. The groove divides the base into a first end and a second end. Both the first end and the second end have a bracket wing. A first groove is formed between the bracket wing and the base plate. The cover is movably connected to the second end and is used to open or close the groove; The traction part has a fixed end and a suspended end. The fixed end of the traction part is fixedly connected to the first end, and the suspended end of the traction part is suspended. The top surface of the traction part and the top surface of the first end form a smooth curved surface. The traction part has a second groove on the bottom surface of the traction part facing away from the top surface of the traction part. The top surface of the traction part and the bottom surface of the traction part are connected through the near-middle side and the far-middle side, and the second groove passes through the near-middle side and the far-middle side.

2. The orthodontic appliance according to claim 1, characterized in that, The top surface of the traction part does not exceed the top surface of the first end in the lip-tongue direction.

3. The orthodontic appliance according to claim 1, characterized in that, The suspended end of the traction unit extends towards the proximal and / or distal side to form an extension, and a third groove is formed between the extension and the bracket wing at the first end.

4. The orthodontic appliance according to claim 3, characterized in that, The outer contours of the ends of the extension and the suspended end of the traction part are arc-shaped along the gingival direction.

5. The orthodontic appliance according to claim 3, characterized in that, The outer contours of the ends of the extension and the suspended end of the traction part are arc-shaped along the lip and tongue direction.

6. The orthodontic appliance according to claim 1, characterized in that, Both the near-middle side and the far-middle side are smoothly connected to the top surface and bottom surface of the traction unit.

7. The orthodontic appliance according to claim 1, characterized in that, The cross-sectional profile of the second groove is a semicircle, a parabola, a semi-ellipse, or several interconnected straight lines or curves.

8. The orthodontic appliance according to claim 7, characterized in that, Define the second groove at the point furthest from the gingiva as A, the point furthest from the labia as B, and the point furthest from the jaw as C. The distance between points A and B in the labial-lingual direction is H, and the distance between points A and C in the gingival-maxillary direction is S, where 0.1mm≤H≤0.8mm and 0.2mm≤S≤1.2mm.

9. The orthodontic appliance according to claim 8, characterized in that, Where 0.4mm≤H<0.5mm or 0.5mm≤H≤0.65mm or 0.65mm<H≤0.75mm; where 0.3mm≤S<0.4mm or 0.4mm≤S≤0.6mm or 0.6mm<S≤0.7mm.

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