Orthodontic appliance

Abstract

Provided is an orthodontic appliance (10), having a labial-lingual direction (Z-axis direction), an occlusal-gingival direction (X-axis direction) and a mesial-distal direction (Y-axis direction), and comprising a bracket member (100), a cover body member (200), and a traction member (300). The bracket member (100) comprises a bearing body (110), a limiting body (120), and a mating body (130). The bearing body (110) is provided with an arch wire bearing surface (141), and the limiting body (120) and the mating body (130) are fixedly arranged at two sides of the arch wire bearing surface (141) at an interval to form an arch wire groove (140). The cover body member (200) is slidably connected to the mating body (130), and has a closed state for closing the arch wire groove (140) and an open state for opening the arch wire groove (140). The traction member (300) is fixedly connected to the limiting body (120). On a first plane, the arch wire bearing surface (141) is provided with a first center line (142), and the first center line (142) is arranged in the same direction as the labial-lingual direction (Z-axis direction); the traction member (300) is provided with a first position point (11) and a second position point (12), and an included angle between a line segment formed by connecting the first position point (11) and the second position point (12) and the labial-lingual direction (Z-axis direction) is α, where 30° ≤ α < 90°. When the orthodontic appliance (10) is in use, a user is less likely to experience a foreign body sensation.

Description

Orthodontic appliances 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 straightening teeth is also improving, but competition is also becoming increasingly fierce.

[0003] In related technologies, orthodontic appliances include brackets. In some orthodontic cases, certain appliances are equipped with traction devices fixed to the brackets, allowing the use of these devices to secure traction materials (such as rubber or springs) to move the teeth. However, these traction devices protrude from the brackets, which can cause a foreign body sensation when wearing these appliances, negatively impacting user comfort.

[0004] Utility Model Content

[0005] This disclosure provides an orthodontic appliance. When used, this appliance minimizes the user's sensation of a foreign object, thus improving the user experience and wearing comfort.

[0006] The technical solution is as follows:

[0007] According to a first aspect of the present disclosure, an orthodontic appliance is provided. The orthodontic appliance has labial-lingual, maxillogingival, and mesiodistal directions. The orthodontic appliance includes brackets, a cover, and a traction member. The bracket includes a support body, a limiting body, and a mating body. The support body has an archwire bearing surface. The limiting body and the mating body are fixedly disposed on both sides of the archwire bearing surface at a distance to form an archwire groove. The cover is slidably connected to the mating body and has a closed state (closing the archwire groove) and an open state (opening the archwire groove). The traction member is fixedly connected to the limiting body.

[0008] Specifically, on the first plane, the archwire bearing surface is provided with a first centerline, which is aligned with the direction of the lip. The traction member is provided with a first position point at a perpendicular distance L1 from the first centerline, where 0.82mm≤L1≤1.67mm.

[0009] On the first plane, the traction member has a second position point, which is closest to the gingival tip in the gingival direction compared to other points on the traction member.

[0010] The angle between the line segment connecting the first and second position points and the direction of the lips and tongue is α, where 30°≤α<90°.

[0011] The orthodontic appliance includes a connecting outer surface passing through a first position point and a second position point. The connecting outer surface smoothly connects with the outer surface of the limiting body, and the connecting outer surface is gradually positioned closer to the carrier body along the direction from the first position point to the second position point. The first plane includes the side projection surface of the orthodontic appliance.

[0012] According to a second aspect of the present disclosure, an orthodontic appliance is also provided. The orthodontic appliance has a labiolingual direction, a maxillogingival direction, and a mesiodistal direction. The orthodontic appliance includes brackets, a cover, and a traction member. The bracket includes a carrier, a limiting body, and a fitting body. The carrier has an archwire bearing surface. The limiting body and the fitting body are fixedly disposed on both sides of the archwire bearing surface at a distance to form an archwire groove. The bracket has a side surface, which is spaced apart from the archwire groove along the maxillogingival direction. The cover is slidably connected to the fitting body and has a closed state (closing the archwire groove) and an open state (opening the archwire groove). The traction member is fixedly connected to the limiting body.

[0013] In the first plane, the lateral surface includes a first trajectory line closest to the gingival end, and the archwire bearing surface has a first center line, which is aligned with the labial and lingual direction. A point A is located on the first trajectory line. Compared to other points on the first trajectory line, point A has the shortest distance to the first center line. The orthodontic appliance has a dividing line parallel to the first center line, which passes through point A and intersects with either the outline of the traction element or the outline of the limiting body to form a first position point.

[0014] On the first plane, the traction member has a second position point, which is closest to the gingival tip in the gingival direction compared to other points on the traction member.

[0015] The angle between the line segment connecting the first and second position points and the lip-lingual direction is α, where 30° ≤ α < 90°. The orthodontic appliance also includes a connecting outer surface passing through the first and second position points. This connecting outer surface smoothly connects to the outer surface of the limiting body, and the connecting outer surface gradually approaches the carrier body along the direction from the first to the second position point. The first plane includes the side projection plane of the orthodontic appliance.

[0016] The technical solution will be further explained below:

[0017] In one embodiment, 45°≤α≤75°.

[0018] In one embodiment, 45° ≤ α ≤ 50°. Or, 50° ≤ α ≤ 55°.

[0019] Alternatively, 55°≤α≤65°. Or, 65°≤α≤75°.

[0020] In one embodiment, the connecting outer surface extends smoothly from the first location point to the second location point.

[0021] In one embodiment, the connecting outer surface includes a first surface and an end face connected to the first surface, a first position point is disposed on the first surface, a second position point is disposed on the end face, and the first surface and the end face have a smooth transition.

[0022] In one embodiment, the first surface is a convex arc surface, and the end face is also a convex arc surface, with a smooth transition between the first surface and the end face.

[0023] Alternatively, the first surface is a convex arc surface, and the end face is also a convex arc surface, with a smooth transition between the first surface and the end face. On the first plane, the end face includes a straight line arranged in the same direction as the lip and tongue direction, and the second position point is located closest to the first position point in the lip and tongue direction.

[0024] Alternatively, on the first plane, the first surface is an inclined plane, the end face is an arc surface, and the first surface and the end face smoothly transition. And / or, on the first plane, the end face includes a straight line arranged in the same direction as the lip and tongue direction, and the second position point is located closest to the first position point in the lip and tongue direction.

[0025] Alternatively, on the first plane, the first surface is a convex arc surface, the end face is a partially spherical surface, and the first surface and the end face are smoothly transitioned.

[0026] Alternatively, on the first plane, the first surface includes a convex arc surface with a first position point and a concave arc surface that smoothly transitions to the convex arc surface. The concave arc surface is disposed between the convex arc surface and the end face, and the concave arc surface smoothly transitions to the end face. And / or, on the first plane, the end face includes a straight line arranged in the same direction as the lip and tongue direction, and the second position point is located closest to the first position point in the lip and tongue direction.

[0027] Alternatively, the first surface includes a concave arc surface with a first position point and a convex arc surface that smoothly transitions to the concave arc surface. The convex arc surface is disposed between the concave arc surface and the end face, and the convex arc surface smoothly transitions to the end face. And / or, on the first plane, the end face includes a straight line arranged in the same direction as the lip and tongue direction, and the second position point is located closest to the first position point in the lip and tongue direction.

[0028] In one embodiment, 0.82mm ≤ L1 ≤ 0.92mm. Or, 0.92mm ≤ L1 ≤ 1.2mm. Or, 1.2mm ≤ L1 ≤ 1.4mm.

[0029] In one embodiment, along the lip and tongue direction, the minimum distance between the first position point and the second position point is L2, 0.05mm≤L2≤2.5mm.

[0030] In one embodiment, 0.1mm ≤ L2 ≤ 1.4mm.

[0031] In one embodiment, 0.05mm ≤ L2 ≤ 0.2mm. Or, 0.2mm ≤ L2 ≤ 0.5mm.

[0032] Alternatively, 0.5mm ≤ L2 ≤ 0.8mm. Alternatively, 0.8mm ≤ L2 ≤ 1.1mm. Alternatively, 1.1mm < L2 ≤ 1.4mm.

[0033] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0034] When using this orthodontic appliance, the brackets are fixed to the teeth via the support body, while the cover body slides through the fitting body. Moving the cover body opens the archwire slot. The archwire is then placed in the slot, and moving the cover body again conceals the archwire slot, confining it within the slot. During orthodontic treatment, when traction (such as rubber or springs) is needed to move the teeth, the traction device is attached to the traction arm, facilitating the movement of the teeth fixed to the brackets and improving orthodontic efficiency.

[0035] When a user wears an orthodontic appliance with this traction component, the angle between the line segment connecting the first and second position points and the labial / lingual direction is optimized. This angle is selected within the range of 30° ≤ α < 90°, allowing the traction component to extend smoothly away from the limiting body, reducing the feeling of a foreign object. Simultaneously, the connecting outer surface at the first and second position points smoothly connects with the outer surface of the limiting body, further reducing the feeling of a foreign object. Moreover, the connecting outer surface gradually approaches the carrier body along the direction from the first to the second position point, bringing the traction component as close to the teeth as possible, reducing the protrusion height, and further reducing the feeling of a foreign object. Thus, users are less likely to experience a foreign object sensation while wearing this orthodontic appliance, improving user experience and wearing comfort.

[0036] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0037] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure.

[0038] To more clearly illustrate the technical solutions in the embodiments of this disclosure, 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 disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 is a schematic diagram of the structure of human teeth in one embodiment.

[0040] Figure 2 is a schematic diagram of the structure of an orthodontic appliance shown in one embodiment.

[0041] Figure 3 is a side view of the orthodontic appliance shown in Figure 1.

[0042] Figure 4 is a schematic diagram of the structure of an orthodontic appliance shown in one embodiment.

[0043] Figure 5 is a side view of the orthodontic appliance shown in Figure 4.

[0044] Figure 6 is a schematic diagram of the structure of an orthodontic appliance shown in one embodiment.

[0045] Figure 7 is a side view of the orthodontic appliance shown in Figure 6.

[0046] Figure 8 is a schematic diagram of the structure of an orthodontic appliance shown in one embodiment.

[0047] Figure 9 is a side view of the orthodontic appliance shown in Figure 7.

[0048] Figure 10 is a schematic diagram of the structure of an orthodontic appliance shown in one embodiment.

[0049] Figure 11 is a side view of the orthodontic appliance shown in Figure 10.

[0050] Figure 12 is a side view of the orthodontic appliance shown in Figure 1.

[0051] Figure 13 is a side view of the orthodontic appliance shown in Figure 1.

[0052] Figure 14 is a side view of an orthodontic appliance shown in one embodiment.

[0053] Figure 15 is a side view of an orthodontic appliance shown in one embodiment.

[0054] Explanation of reference numerals in the attached drawings: 10, orthodontic appliance; 11, first position point; 12, second position point; 13, line segment; 14, connecting outer surface; 15, dividing line; 100, bracket; 110, carrier; 120, limiting body; 121, second surface; 130, mating body; 140, archwire groove; 141, archwire bearing surface; 142, first center line; 150, side surface; 151, first trajectory line; 152, point A; 200, cover; 210, third surface; 300, traction element; 301, first end; 302, second end; 310, first surface; 325, end face. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and do not limit the scope of protection of this disclosure.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure.

[0057] To better understand the orthodontic appliance of this application, we will first use the dental reference frame to understand the orientation of the orthodontic appliance.

[0058] Figure 1 shows the directional coordinate system for teeth, including the labial, lingual, mesial, distal, occlusal, and gingival surfaces. It should be noted that the terms labial, lingual, mesial, distal, occlusal plane, and gingival surface are industry terms used in orthodontic treatment. Taking the mandibular teeth as an example, the surface of an orthodontic appliance can be roughly divided into six surfaces. The surface facing the labial side is the labial surface of the orthodontic appliance, and the surface facing the lingual side is the lingual surface. The direction formed by the labial and lingual surfaces is also called the labiolingual direction. The surface facing the occlusal surface of the maxillary teeth is the occlusal surface of the orthodontic appliance, also known as the occlusal plane or occlusal end face. The surface facing the gingival tissue of the teeth it is bonded to is the gingival end face of the orthodontic appliance. The occlusal surface and the gingival end face are opposite each other, and the direction formed by the occlusal surface and the gingival surface is also called the gingival direction. The surface of the tooth facing the midline of the tooth is the mesial surface, and the surface opposite the mesial surface is called the distal surface. The direction formed by the mesial and distal surfaces is called the mesiodistal direction.

[0059] Furthermore, in describing the direction, "lip-tongue direction" generally refers to two directions. However, "lip-tongue direction" specifically refers to a single direction, that is, from the side of the lips to the side of the tongue, distinguished by whether or not a short horizontal line is added.

[0060] To better understand the orthodontic appliance of this application, the components and spaces described below are also described using the reference frame of the mandibular teeth, such as the labial-lingual direction, the maxillogingival direction, and the mesiodistal direction, but this does not unduly limit the orthodontic appliance and spaces of this application.

[0061] As shown in Figures 2 and 3, in some embodiments of this disclosure, an orthodontic appliance 10 is provided. This orthodontic appliance 10 has a labiolingual direction, a maxillogingival direction, and a mesiodistal direction. As shown in Figure 3, the labiolingual direction is the Z-axis direction. The maxillogingival direction is the X-axis direction. The mesiodistal direction is the Y-axis direction.

[0062] As shown in Figures 2 and 3, the orthodontic appliance 10 includes a bracket 100, a cover 200, and a traction member 300. The bracket 100 includes a support body 110, a limiting body 120, and a mating body 130. The support body 110 has an archwire bearing surface 141. The limiting body 120 and the mating body 130 are fixedly disposed on both sides of the archwire bearing surface 141 at a distance to form an archwire groove 140. The cover 200 is slidably connected to the mating body 130 and has a closed state (closing the archwire groove 140) and an open state (opening the archwire groove 140). The traction member 300 is fixedly connected to the limiting body 120. For example, the traction member 300 and the limiting body 120 are integrally formed.

[0063] In the first plane, the archwire bearing surface 141 is provided with a first centerline 142, which is arranged in the same direction as the lip and tongue. The traction member 300 is provided with a first position point 11 at a vertical distance L1 from the first centerline 142, where 0.82mm≤L1≤1.67mm.

[0064] On the first plane, the traction member 300 is provided with a second position point 12. Compared with other points on the traction member 300, the second position point 12 is located closest to the gingival end in the gingival direction and closest to the first position point 11 in the labial-lingual direction.

[0065] The angle between the line segment 13 formed by connecting the first position point 11 and the second position point 12 and the direction of the lips and tongue is α, where 30°≤α<90°.

[0066] The orthodontic appliance 10 includes a connecting outer surface 14 passing through a first position point 11 and a second position point 12. The connecting outer surface 14 is smoothly connected to the outer surface of the limiting body 120. The connecting outer surface 14 is gradually positioned closer to the carrier body 110 along the direction from the first position point 11 to the second position point 12. The first plane includes the side projection plane of the orthodontic appliance 10.

[0067] When the orthodontic appliance 10 is in use, the bracket 100 is fixed to the teeth via the carrier 110, while the cover 200 is slidably connected to the mating body 130. The archwire slot 140 is opened by moving the cover 200. The archwire is then placed in the slot 140, and the cover 200 is moved again to cover the slot 140, thus confining the archwire within it. During orthodontic treatment, when traction (such as rubber or springs) is needed to move the teeth, the traction device is attached to the traction member 300, facilitating the movement of the teeth fixedly connected to the bracket 100 and improving orthodontic efficiency.

[0068] When a user wears the orthodontic appliance 10 with the traction element 300, the angle between the line segment 13 formed by connecting the first position point 11 and the second position point 12 and the labial / lingual direction is optimized. This angle is selected within the range of 30° ≤ α < 90°, allowing the traction element 300 to extend smoothly away from the limiting body 120, reducing the feeling of a foreign object. Simultaneously, the connecting outer surface 14, passing through the first and second position points 11 and smoothly connecting with the outer surface of the limiting body 120, further reduces the feeling of a foreign object. Moreover, the connecting outer surface 14 is gradually positioned closer to the carrier 110 along the direction from the first position point 11 to the second position point 12, allowing the traction element 300 to be positioned as close to the teeth as possible, reducing the protrusion height, and further reducing the feeling of a foreign object. Thus, users are less likely to experience a foreign object sensation while wearing the orthodontic appliance 10, which improves the user experience and wearing comfort.

[0069] It should be noted that "smooth connection between the outer surface 14 and the outer surface of the limiting body 120" should be interpreted broadly, meaning that the connection between the outer surface 14 and the limiting body 120 has no obvious sharp edges. It should not feel rough to the touch, and / or should not cause a foreign body sensation when in contact with the tongue and / or lips. Specifically, this includes a smooth, rounded connection between the outer surface 14 and the limiting body 120, a seamless connection between the outer surface 14 and the limiting body 120, and a curved transition between the outer surface 14 and the limiting body 120. It also includes the connection between the outer surface 14 and the limiting body 120 being the same curved surface such as a sphere, ellipsoid, or cylinder. Alternatively, the outer surface 14 and the limiting body 120 may be tangent. Or, the outer surface 14 may follow the curvature trajectory of the smooth surface of the limiting body 120, etc.

[0070] In addition, it is permissible for the outer surfaces of the connecting outer surface 14 and / or the limiting body 120 to have local pits or protrusions and / or features that have identification or positioning functions (recesses / protrusions) without affecting the overall tactile comfort of the orthodontic appliance 10.

[0071] It should be noted that the phrase "the connecting outer surface 14 is gradually positioned closer to the carrier 110 along the direction from the first position point 11 to the second position point 12" should be interpreted broadly, meaning it should reduce the wearer's foreign body sensation. Specifically, this includes ensuring that the highest point of the connecting outer surface 14 is not higher than the highest point of the limiting body 120 along the lip and tongue direction. This effectively reduces the patient's foreign body sensation, improves the user experience, and enhances the user's wearing comfort.

[0072] In the embodiments of this disclosure, the traction member 300 and the support member 100 are integrally formed, and the connecting outer surface 14 is disposed on the traction member 300. In this way, it can be further ensured that the surfaces of the traction member 300 and the limiting body 120 are smoothly connected without obvious sharp edges.

[0073] As shown in Figures 2 and 3, in some embodiments, the connecting outer surface 14 includes the upper surface of the traction member 300. Thus, when fixed to the user's teeth (or dental mold) by the carrier 110, the upper surfaces of the limiting body 120 and the traction member 300 are most likely to come into contact with the user's tongue and / or lips. At this time, the connecting outer surface 14 smoothly connects with the outer surface of the limiting body 120, ensuring a smooth connection between the upper surface of the traction member 300 and the upper surface of the limiting body 120 without any sharp edges. The connection point is not rough to the touch. And / or, the orthodontic appliance 10 does not easily cause a foreign body sensation after contacting the tongue and / or lips. This further ensures a smooth connection between the traction member 300 and the limiting body 120, effectively reducing the foreign body sensation experienced by the user during the wearing of the orthodontic appliance 10, improving user experience and wearing comfort.

[0074] It should be noted that α is selected within the range of 30°≤α<90° so that the position of the traction element 300, the bracket element 100, and the cover element 200 can form an appearance that is close to a circle / ellipse arc. This makes the orthodontic appliance 10 fit the shape of the oral mucosa in the oral environment better, reduces the stimulation of the mucosa by the traction element 300, and improves comfort.

[0075] In some embodiments, 45°≤α≤75°. Thus, by further optimizing the angle data between the line segment formed by connecting the first position point and the second position point and the direction of the lip and tongue, and selecting from 45°≤α≤75°, it can be ensured that the outer surface of the connection gradually and smoothly descends from the point of connection with the limiting body in the direction away from the limiting body, which helps to reduce the feeling of foreign objects.

[0076] Optionally, in some embodiments, 45°≤α≤50°. This ensures that the traction element 300 is at a suitable height from the gingiva and the tooth surface, providing sufficient ligation space, easy cleaning, and convenient clinical bonding procedures.

[0077] Optionally, in some embodiments, 50°≤α≤55°. This ensures that the traction element 300 is at a suitable height from the gingiva and the tooth surface, providing sufficient ligation space, easy cleaning, and convenient clinical bonding procedures.

[0078] Optionally, in some embodiments, 55°≤α≤65°. This ensures that the traction element 300 is at a suitable height from the gingiva and the tooth surface, provides sufficient ligation space, is easy to clean, and facilitates clinical bonding procedures.

[0079] Optionally, in some embodiments, 65°≤α≤75°. This ensures that the traction element 300 is at a suitable height from the gingiva and the tooth surface, provides sufficient ligation space, is easy to clean, and facilitates clinical bonding procedures.

[0080] Optionally, in some embodiments, α = one of 30°, 31°, 32°, 35°, 38°, 40°, 42°, 45°, 46°, 48°, 49°, 50°, 51°, 54°, 55°, 56°, 56.5°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 64.5°, 65°, 66°, 68°, 70°, 72°, 75°, 76°, 77°, 78°, 80°, 81°, 85°, 89°, 89.9°, etc.

[0081] It should be noted that L1 is set according to the width requirements of the bow wire groove, the fit error between the cover and the mating body, and the width requirements of the ligature wing formed by the bracket, so that the first position point is set on the traction component.

[0082] In some embodiments, 0.92mm ≤ L1 ≤ 1.4mm. This ensures that the first position point is set on the traction member and at the junction between the traction member and the limiting body, so as to ensure a smooth connection between the outer surface of the connection and the outer surface of the limiting body, making the transition between the traction member and the limiting body smooth and further reducing the feeling of foreign objects.

[0083] Optionally, in some embodiments, 0.82mm≤L1≤0.92mm. Within this range, the gingival width of the bracket is designed to be small, the overall shape of the bracket is more compact, and the feeling of a foreign body in the oral cavity is less (common in pediatric orthodontic brackets).

[0084] Optionally, in some embodiments, 0.92mm ≤ L1 ≤ 1.2mm. Within this range, the gingival-maxillary width design of the bracket is the most common and belongs to a common type in this technical field, with a moderate bracket shape.

[0085] Optionally, in some embodiments, 1.2mm≤L1≤1.4mm. Within this range, the gingival width of the bracket is designed to be larger, and the overall shape of the bracket is larger (common in ceramic bracket designs).

[0086] Optionally, in some embodiments, L1 is one of the following: 0.82mm, 0.83mm, 0.85mm, 0.86mm, 0.90mm, 0.92mm, 0.95mm, 0.96mm, 1mm, 1.02mm, 1.05mm, 1.1mm, 1.11mm, 1.15mm, 1.2mm, 1.22mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.41mm, 1.45mm, 1.5mm, 1.55mm, 1.6mm, 1.61mm, 1.65mm, 1.66mm, 1.67mm, etc.

[0087] As shown in Figure 2, in some embodiments, the connecting outer surface 14 smoothly extends from the first position point 11 to the second position point 12. Thus, the connecting outer surface 14 itself is smoothly designed without obvious sharp edges. Touching the connecting outer surface 14 with a finger is not uncomfortable. And / or, when the connecting outer surface 14 comes into contact with the tongue and / or lips, it is less likely to cause a foreign body sensation. This effectively reduces the foreign body sensation experienced by the user during the wearing of the orthodontic appliance 10, improving the user experience and wearing comfort.

[0088] As shown in Figures 2 to 11, in some embodiments, the connecting outer surface 14 includes a first surface 310 and an end face 325 connected to the first surface 310. A first position point 11 is disposed on the first surface 310, and a second position point 12 is disposed on the end face 325. The first surface 310 and the end face 325 have a smooth transition. Thus, the end of the traction member 300 formed by the first surface 310 and the end face 325 has no obvious sharp edges. Touching this end with a finger is not uncomfortable. And / or, when this end comes into contact with the tongue and / or lips, it is less likely to cause a foreign body sensation. This effectively reduces the foreign body sensation experienced by the user during the wearing of the orthodontic appliance 10, improving the user experience and wearing comfort.

[0089] It should be noted that "smooth transition between the first surface 310 and the end face 325" should be interpreted broadly, meaning that there are no obvious sharp edges at the junction of the first surface 310 and the end face 325. It should not feel rough to the touch, and / or should not cause a foreign body sensation when in contact with the tongue and / or lips. Specifically, this includes a smooth connection between the first surface 310 and the end face 325, or an arc-shaped transition between the first surface 310 and the end face 325. It also includes the junction between the upper surfaces of the first surface 310 and the end face 325 being the same curved surface such as a sphere, ellipsoid, or cylinder, or the first surface 310 and the end face 325 being tangent, etc.

[0090] In some embodiments, the first surface 310 is a convex arc surface, and the end surface 325 is also a convex arc surface, with a smooth transition between the first surface 310 and the end surface 325. This ensures that the junction between the first surface 310 and the end surface 325 has no obvious sharp edges. It is not rough to the touch, and / or, it does not easily cause a foreign body sensation when in contact with the tongue and / or lips.

[0091] As shown in Figures 2 and 3, in some embodiments, the first surface 310 is a convex arc surface, and the end face 325 is also a convex arc surface, with a smooth transition between the first surface 310 and the end face 325. On the first plane, the end face 325 includes a straight line arranged in the same direction as the lips and tongue, and the second position point 12 is located closest to the first position point 11 in the direction of the lips and tongue. This ensures that there are no obvious sharp edges at the junction of the first surface 310 and the end face 325. It is not rough to the touch, and / or, after contact with the tongue and / or lips, it does not easily produce a foreign body sensation.

[0092] Specifically, in this embodiment, α = 28° or 58.2°.

[0093] As shown in Figures 4 and 5, in some embodiments, the first surface 310 includes a convex arc surface with a first position point 11 and a concave arc surface that smoothly transitions to the convex arc surface. The concave arc surface is disposed between the convex arc surface and the end face 325, and the concave arc surface smoothly transitions to the end face 325. On the first plane, the end face includes a straight line arranged in the same direction as the lips and tongue, and the second position point 12 is located closest to the first position point 11 in the direction of the lips and tongue. In this way, there are no obvious sharp edges at the junction of the first surface 310 and the end face 325. When touched by hand, it is not rough. And / or, after contact with the tongue and / or lips, it is not easy to produce a foreign body sensation, etc.

[0094] Specifically, in this embodiment, α = 61° or 63.8°.

[0095] As shown in Figures 6 and 7, in some embodiments, the first surface 310 includes a concave arc surface with a first position point 11 and a convex arc surface that smoothly transitions to the concave arc surface. The convex arc surface is disposed between the concave arc surface and the end face 325, and the convex arc surface smoothly transitions to the end face 325. On the first plane, the end face includes a straight line arranged in the same direction as the lips and tongue, and the second position point 12 is located closest to the first position point 11 in the direction of the lips and tongue. In this way, there are no obvious sharp edges at the junction of the first surface 310 and the end face 325. When touched by hand, it is not rough. And / or, after contact with the tongue and / or lips, it is not easy to produce a foreign body sensation, etc.

[0096] Specifically, in this embodiment, α = 67.5° or 68°.

[0097] As shown in Figures 8 and 9, in some embodiments, on the first plane, the first surface 310 is an inclined plane, and the end face 325 is a plane arranged in the same direction as the lips and tongue, with a smooth transition between the first surface 310 and the end face 325. And / or, on the first plane, the end face includes a straight line arranged in the same direction as the lips and tongue, and the second position point 12 is located closest to the first position point 11 in the direction of the lips and tongue. This ensures that there are no obvious sharp edges at the junction of the first surface 310 and the end face 325. It is not rough to the touch. And / or, it does not easily cause a foreign body sensation after contact with the tongue and / or lips.

[0098] Specifically, in this embodiment, α = 56.4° or 72°.

[0099] As shown in Figures 10 and 11, in some embodiments, the first surface 310 is a convex arc surface, and the end face 325 is a partially spherical surface, with a smooth transition between the first surface 310 and the end face 325. This ensures that the junction between the first surface 310 and the end face 325 has no obvious sharp edges. It is not rough to the touch, and / or, it does not easily cause a foreign body sensation when in contact with the tongue and / or lips.

[0100] Specifically, in this embodiment, α = 64.7° or 65°.

[0101] In some embodiments, the traction member 300 includes a first end 301 fixedly connected to the limiting body 120 and a second end 302 protruding from the limiting body 120 and suspended in mid-air. A first position point 11 is located at the first end 301, and a second position point 12 is located at the second end 302. Thus, the first position point 11 is located on the traction member 300 and at the junction between the traction member 300 and the limiting body 120. The connecting outer surface 14 is also located on the traction member 300, and when it smoothly connects with the outer surface of the limiting body 120, the transition between the traction member 300 and the limiting body 120 is smooth, further reducing the feeling of foreign objects.

[0102] As shown in Figures 2 to 11, in some embodiments, the limiting body 120 includes a second surface 121, which is disposed on the side of the limiting body 120 away from the mating body 130. The connecting outer surface 14 includes a first surface 310, at least a portion of which smoothly transitions with the second surface 121. A first position point 11 is disposed at the junction of the first surface 310 and the second surface 121. Thus, when a user wears the orthodontic appliance 10 with the traction member 300, the smooth connection between the first surface 310 and the second surface 121 ensures a smooth connection between the traction member 300 and the limiting body 120. This reduces the likelihood of a foreign body sensation during wear, improving user experience and comfort.

[0103] It should be noted that "at least a portion of the first surface smoothly transitions to the second surface" should be interpreted broadly, meaning that at least a portion of the first surface smoothly transitions to the second surface without feeling rough to the touch. It should not cause a foreign body sensation when in contact with the tongue and / or lips. Specifically, this includes a smooth, rounded transition between at least a portion of the first surface and the second surface, a seamless transition between at least a portion of the first surface and the second surface, or a curved transition between at least a portion of the first surface and the second surface.

[0104] In addition, the first and / or second surfaces may have local pits or protrusions and / or features that have identification or positioning functions (recesses / protrusions) that do not affect the overall tactile comfort of the orthodontic appliance 10.

[0105] The first surface includes at least the upper surface of the traction element, and the second surface includes at least the upper surface of the limiting body. Thus, it is fixed to the user's teeth (or dental mold) by the carrier, and the upper surfaces of the limiting body and the traction element are most likely to come into contact with the user's tongue and / or lips. At this point, at least a portion of the first surface smoothly transitions into the second surface. This allows for a smooth connection between the upper surfaces of the limiting body and the traction element, ensuring a smooth connection between the traction element and the limiting body, effectively reducing the foreign body sensation experienced by the user during orthodontic appliance wear, and improving user experience and wearing comfort.

[0106] In some embodiments, the first surface and the second surface transition smoothly. This also achieves a smooth connection between the first and second surfaces, reducing discomfort and discomfort, thus improving user experience and wearing comfort.

[0107] Furthermore, as shown in Figures 8 and 9, in some embodiments, the first surface includes a second plane. The second surface is provided with a third plane. The second plane and the third plane are smoothly connected. Thus, the smooth connection between the third plane and the second plane makes the connection between the traction member and the bracket member smoother and more seamless, reducing the feeling of foreign objects and improving the user experience and wearing comfort.

[0108] Optionally, in some embodiments, the cover member includes a third surface that smoothly transitions with the first surface. This results in a smooth transition between the cover member and the bracket member, making the orthodontic appliance smoother overall with fewer sharp edges, further reducing the feeling of foreign objects and improving user experience and wearing comfort.

[0109] Alternatively, in some embodiments, the first surface and the second surface have a smooth transition. In this way, the junction between the first and second surfaces can distribute the stress generated during the biting process, thereby minimizing the patient's foreign body sensation, improving user experience and wearing comfort, and also reducing the risk of the traction device falling off.

[0110] It should be noted that "smooth transition" or "smooth connection" should be interpreted broadly to include various surface connection methods such as cylindrical arc surfaces, elliptical cylindrical arc surfaces, ellipsoidal arcs, and spherical arcs. Specifically, smooth connections include arc transitions, internal tangent connections, external tangent connections, and so on.

[0111] In some embodiments, the first surface includes a first curved surface, and the second surface includes a second curved surface. The second curved surface smoothly connects to the first curved surface. Thus, the smooth connection between the first and second curved surfaces makes the orthodontic appliance more rounded and smooth, without obvious sharp edges. Furthermore, the interaction between the first and second curved surfaces can disperse the stress generated during food biting, thereby reducing the patient's foreign body sensation, improving user experience and wearing comfort, and enhancing the fixation reliability of the traction device.

[0112] It should be noted that the term "first surface" should be interpreted broadly to include non-planar surfaces that are not rough to the touch. Specifically, the first surface includes at least one of curved surfaces, spherical surfaces, etc.

[0113] It should be noted that the term "second surface" should be interpreted broadly to include non-planar surfaces that are not rough to the touch. Specifically, the term "first surface" includes at least one of the following: curved surfaces, spherical surfaces, etc.

[0114] It should be noted that curved surfaces include cylindrical curved surfaces, elliptical curved surfaces, etc. Spherical surfaces include spherical surfaces, ellipsoidal surfaces, etc.

[0115] In some embodiments, the first curved surface is tangent to the second curved surface to create a smooth transition between the two surfaces. This facilitates a smooth connection between the first and second curved surfaces, reducing the design complexity of orthodontic appliances.

[0116] It should be noted that "the first surface and the second surface are tangent" should be interpreted broadly, including tangency in the extension direction of the first surface and / or the second surface, or tangency when the first surface and the second surface are in contact. In addition, tangency includes internal tangency or external tangency.

[0117] Optionally, in some embodiments, the first curved surface is a first arc surface, the second curved surface is a second arc surface, and the arc length corresponding to the second arc surface can be tangent to the arc length corresponding to the first arc surface.

[0118] In some embodiments, the first surface is a partial sphere, the second surface is a partial sphere, and the sphere corresponding to the second surface is tangent to the sphere corresponding to the first surface.

[0119] In some embodiments, at least one of the first and second surfaces has a convex arc surface located at the transition between them. This convex arc surface makes the connection between the first and second surfaces smoother and less uncomfortable to the touch. When the user's tongue and / or lips come into contact with the convex arc surface, it reduces the likelihood of a foreign body sensation, thus decreasing patient discomfort and improving user experience and wearing comfort. It also makes the orthodontic appliance more rounded and smooth, without obvious sharp edges.

[0120] As shown in Figure 12, in some embodiments, the minimum distance between the first position point 11 and the second position point 12 along the lip and tongue direction is L2, where 0.05mm ≤ L2 ≤ 2.5mm. Thus, by optimizing the minimum distance data between the first position point 11 and the second position point 12, which is selected within the range of 0.05mm ≤ L2 ≤ 2.5mm, the traction component descends smoothly and with a reasonable drop along the direction away from the limiting body, reducing the feeling of foreign objects.

[0121] In some embodiments, 0.1mm ≤ L2 ≤ 1.4mm. Thus, by further optimizing the minimum distance data between the first position point and the second position point, and selecting from 0.1mm ≤ L2 ≤ 1.4mm, the traction component descends smoothly and with a small drop along the direction away from the limiting body, further reducing the feeling of foreign objects.

[0122] Optionally, in some embodiments, 0.05mm ≤ L2 ≤ 0.2mm. Thus, within this numerical range, the traction member 300 has a smaller drop in the labial-lingual direction, which can also ensure that the orthodontic appliance 10 has good comfort.

[0123] Optionally, in some embodiments, 0.2mm ≤ L2 ≤ 0.5mm. In this range, the lip-tongue drop of the traction element is small, which can also ensure that the orthodontic appliance 10 has good comfort.

[0124] Optionally, in some embodiments, 0.5mm ≤ L2 ≤ 0.8mm. Within this range, the labial-lingual drop of the traction element 300 is suitable, allowing it to cooperate with the bracket element 100 and the cover element 200 to form an arcuate shape, enabling the orthodontic appliance 10 to conform to the mucosa and provide good comfort. Furthermore, it can cooperate with the archwire groove to form an inward-facing appearance on the gingival side, further conforming to the mucosa and reducing the feeling of a foreign body.

[0125] Optionally, in some embodiments, 0.8mm ≤ L2 ≤ 1.1mm. Within this range, the traction element 300 has a suitable labial-lingual drop, allowing it to cooperate with the bracket element 100 and the cover element 200 to form an arcuate shape, ensuring the orthodontic appliance 10 conforms to the mucosa and provides good comfort. Furthermore, it can cooperate with the archwire groove to form an inward-facing appearance on the gingival side, further conforming to the mucosa and reducing the feeling of a foreign body.

[0126] Optionally, 1.1mm < L2 ≤ 1.4mm. In this range, even though the lip-tongue drop of the traction element is relatively large, the orthodontic appliance 10 can still ensure good comfort.

[0127] Optionally, in some embodiments, L2 is one of the following: 0.1mm, 0.11mm, 0.15mm, 0.16mm, 0.2mm, 0.21mm, 0.25mm, 0.3mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.61mm, 0.65mm, 0.7mm, 0.75mm, 0.79mm, 0.8mm, 0.82mm, 0.85mm, 0.9mm, 0.95mm, 1mm, 1.02mm, 1.05mm, 1.1mm, 1.11mm, 1.15mm, 1.2mm, 1.22mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, etc.

[0128] As shown in Figures 13 to 15, in some embodiments, an orthodontic appliance 10 is provided. This orthodontic appliance 10 has a labiolingual direction, a maxillogingival direction, and a mesiodistal direction. The labiolingual direction is the Z-axis direction. The maxillogingival direction is the X-axis direction. The mesiodistal direction is the Y-axis direction.

[0129] The orthodontic appliance 10 includes a bracket 100, a cover 200, and a traction element 300. The bracket 100 includes a support body 110, a limiting body 120, and a mating body 130. The support body 110 has an archwire bearing surface 141. The limiting body 120 and the mating body 130 are fixedly disposed on both sides of the archwire bearing surface 141 at intervals to form an archwire groove 140. The bracket 100 has a side surface 150, which is spaced apart from the archwire groove 140 along the gingival direction. The cover 200 is slidably connected to the mating body 130 and has a closed state (with the archwire groove 140 closed) and an open state (with the archwire groove 140 open). The traction element 300 is fixedly connected to the limiting body 120.

[0130] In the first plane, the side surface 150 includes a first trajectory line 151 closest to the gingival end, and the archwire bearing surface 141 has a first center line 142, which is aligned with the labial and lingual direction. A point A 152 is located on the first trajectory line 151. Compared to other points on the first trajectory line 151, the distance from point A 152 to the first center line 142 is L3, and it is the shortest. The orthodontic appliance 10 has a dividing line 15 parallel to the first center line 142. The dividing line 15 passes through point A 152 and intersects with either the outline of the traction member 300 or the outline of the limiting body 120 to form a first position point 11.

[0131] On the first plane, the traction member 300 is provided with a second position point 12, which is closest to the gingival tip in the gingival direction compared to other points on the traction member 300.

[0132] The angle between the line segment 13 formed by connecting the first position point 11 and the second position point 12 and the direction of the labia and lingual muscles is α, where 30°≤α<90°. The orthodontic appliance 10 also includes a connecting outer surface 14 passing through the first position point 11 and the second position point 12. The connecting outer surface 14 smoothly connects with the outer surface of the limiting body 120, and the connecting outer surface 14 is gradually positioned closer to the carrier body 110 along the direction from the first position point 11 to the second position point 12. The first plane includes the side projection plane of the orthodontic appliance 10.

[0133] When the orthodontic appliance 10 is in use, the bracket 100 is fixed to the teeth via the carrier 110, while the cover 200 is slidably connected to the mating body 130. The archwire slot 140 is opened by moving the cover 200. The archwire is then placed in the slot 140, and the cover 200 is moved again to cover the slot 140, thus confining the archwire within it. During orthodontic treatment, when traction (such as rubber or springs) is needed to move the teeth, the traction device is attached to the traction member 300, facilitating the movement of the teeth fixedly connected to the bracket 100 and improving orthodontic efficiency.

[0134] When a user wears the orthodontic appliance 10 with the traction element 300, the angle between the line segment 13 formed by connecting the first position point 11 and the second position point 12 and the labial / lingual direction is optimized. This angle is within the range of 30°≤α<90°, allowing the traction element 300 to extend smoothly away from the limiting body 120, reducing the feeling of a foreign object. Simultaneously, the connecting outer surface 14, passing through the first and second position points 11 and 12, smoothly connects with the outer surface of the limiting body 120, resulting in a smooth transition between the traction element 300 and the limiting body 120, further reducing the feeling of a foreign object. Furthermore, the connecting outer surface 14 is gradually positioned closer to the carrier 110 along the direction from the first position point 11 to the second position point 12, allowing the traction element 300 to be positioned as close to the teeth as possible, reducing the protrusion height, and further reducing the feeling of a foreign object. Thus, users are less likely to experience a foreign object sensation while wearing the orthodontic appliance 10, which improves the user experience and wearing comfort.

[0135] It should be noted that "smooth connection between the outer surface and the outer surface of the limiting body" should be interpreted broadly, meaning that there are no obvious sharp edges at the junction of the outer surface and the limiting body. It should not feel rough to the touch, and / or should not cause a foreign body sensation when in contact with the tongue and / or lips. Specifically, this includes a smooth, rounded connection between the outer surface and the limiting body, a seamless transition between the outer surface and the limiting body, and a curved transition between the outer surface and the limiting body. It also includes the junction between the outer surface and the limiting body being a spherical, ellipsoidal, or cylindrical surface, etc., on the same curved surface. Alternatively, the outer surface and the limiting body surface may be tangent. Or, the outer surface may follow the curvature trajectory of the smooth surface of the limiting body, etc.

[0136] In addition, it is permissible for the outer surfaces of the connecting outer surface 14 and / or the limiting body 120 to have local pits or protrusions and / or features that have identification or positioning functions (recesses / protrusions) without affecting the overall tactile comfort of the orthodontic appliance 10.

[0137] In some embodiments, when the first position point is set on the traction member, and the connecting outer surface is also on the traction member, the connecting outer surface and the outer surface of the limiting body are smoothly connected, making the connection between the connecting outer surface and the limiting body smooth and less likely to produce a foreign body sensation.

[0138] In some embodiments, the first position point is set on the limiting body. When the connecting outer surface is not higher than the highest point on the limiting body, the connecting outer surface and the outer surface of the limiting body are smoothly connected. The connecting outer surface is used as a whole surface to connect the surface of the traction member and the surface of the limiting body, so that the surface of the limiting body and the surface of the traction member transition smoothly and are not prone to foreign body sensation.

[0139] It should be noted that the phrase "the connecting outer surface gradually approaches the carrier along the direction from the first position point to the second position point" should be interpreted broadly, meaning anything that reduces the wearer's foreign body sensation. Specifically, this includes ensuring that the highest point of the connecting surface is not higher than the highest point of the limiting body surface along the lip and tongue direction. This effectively reduces the patient's foreign body sensation, improving user experience and wearing comfort.

[0140] In the embodiments of this disclosure, the traction member and the support member are integrally formed, and the connecting outer surface is disposed on the traction member. This further ensures a smooth connection between the surfaces of the traction member and the limiting body, without any obvious sharp edges.

[0141] In some embodiments, the connecting outer surface includes the upper surface of the orthodontic appliance. Thus, it is fixed to the user's teeth (or dental mold) by the carrier, and the upper surface of the orthodontic appliance most easily comes into contact with the user's tongue and / or lips. At this point, the connecting outer surface smoothly connects with the outer surface of the limiting body, ensuring a smooth connection between the upper surface of the traction element and the upper surface of the limiting body, without any obvious sharp edges. The connection point is not rough to the touch. And / or, the orthodontic appliance does not easily cause a foreign body sensation after contacting the tongue and / or lips. This further ensures a smooth connection between the traction element and the limiting body, effectively reducing the foreign body sensation experienced by the user during the wearing of the orthodontic appliance, improving the user experience and wearing comfort.

[0142] It should be noted that α is selected within the range of 30°≤α<90° so that the position of the traction element 300, the bracket element 100, and the cover element 200 can form an appearance that is close to a circle / ellipse arc. This makes the orthodontic appliance 10 fit the shape of the oral mucosa in the oral environment better, reduces the stimulation of the mucosa by the traction element 300, and improves comfort.

[0143] In some embodiments, 45°≤α≤75°. Thus, by further optimizing the angle data between the line segment formed by connecting the first position point and the second position point and the direction of the lip and tongue, and selecting from 45°≤α≤75°, it can be ensured that the outer surface of the connection gradually and smoothly descends from the point of connection with the limiting body in the direction away from the limiting body, which helps to reduce the feeling of foreign objects.

[0144] Optionally, in some embodiments, 45°≤α≤50°. This ensures that the traction element 300 is at a suitable height from the gingiva and the tooth surface, providing sufficient ligation space, easy cleaning, and convenient clinical bonding procedures.

[0145] Optionally, in some embodiments, 50°≤α≤55°. This ensures that the traction element 300 is at a suitable height from the gingiva and the tooth surface, providing sufficient ligation space, easy cleaning, and convenient clinical bonding procedures.

[0146] Optionally, in some embodiments, 55°≤α≤65°. This ensures that the traction element 300 is at a suitable height from the gingiva and the tooth surface, provides sufficient ligation space, is easy to clean, and facilitates clinical bonding procedures.

[0147] Optionally, in some embodiments, 65°≤α≤75°. This ensures that the traction element 300 is at a suitable height from the gingiva and the tooth surface, provides sufficient ligation space, is easy to clean, and facilitates clinical bonding procedures.

[0148] Optionally, in some embodiments, α = one of 30°, 31°, 32°, 35°, 38°, 40°, 42°, 45°, 46°, 48°, 49°, 50°, 51°, 54°, 55°, 56°, 56.5°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 64.5°, 65°, 66°, 68°, 70°, 72°, 75°, 76°, 77°, 78°, 80°, 81°, 85°, 89°, 89.9°, etc.

[0149] As shown in Figure 13, in some embodiments, the connecting outer surface 14 smoothly extends from the first position point 11 to the second position point 12. Thus, the connecting outer surface 14 itself is smoothly designed without obvious sharp edges. Touching the connecting outer surface with a finger is not harsh. And / or, when the connecting outer surface 14 comes into contact with the tongue and / or lips, it is less likely to cause a foreign body sensation. This effectively reduces the foreign body sensation experienced by the user during the wearing of orthodontic appliances, improving the user experience and wearing comfort.

[0150] As shown in Figure 13, in some embodiments, the connecting outer surface 14 includes a first surface 310 and an end face 325 connected to the first surface. A first position point 11 is disposed on the first surface 310, and a second position point 12 is disposed on the end face 325. The first surface 310 and the end face 325 have a smooth transition. Thus, the end of the traction member 300 formed by the first surface 310 and the end face 325 has no obvious sharp edges. Touching this end with a finger is not uncomfortable. And / or, when this end comes into contact with the tongue and / or lips, it is less likely to cause a foreign body sensation. This effectively reduces the foreign body sensation experienced by the user during the wearing of orthodontic appliances, improving the user experience and wearing comfort.

[0151] It should be noted that "smooth transition between the first surface and the end face" should be interpreted broadly, meaning that there are no obvious sharp edges at the junction of the first surface and the end face. It should not feel rough to the touch, and / or should not cause a foreign body sensation when in contact with the tongue and / or lips. Specifically, this includes a smooth, rounded connection between the first surface and the end face, or a curved transition between the first surface and the end face. It also includes situations where the junction between the upper surfaces of the first surface and the end face is a spherical, ellipsoidal, or cylindrical surface, or where the first surface and the end face are tangent, etc.

[0152] As shown in Figure 13, in some embodiments, the first surface 310 is a convex arc surface, and the end face 325 is also a convex arc surface, with a smooth transition between the first surface 310 and the end face 325. On the first plane, the end face 325 includes a straight line arranged in the same direction as the lips and tongue, and the second position point 12 is located closest to the first position point 11 in the direction of the lips and tongue. This ensures that there are no obvious sharp edges at the junction of the first surface 310 and the end face 325. It is not rough to the touch, and / or, after contact with the tongue and / or lips, it does not easily produce a foreign body sensation.

[0153] Specifically, in this embodiment, α = 28° or 58.2°.

[0154] As shown in Figure 14 or Figure 15, in some embodiments, the first surface 310 includes a convex arc surface with a first position point 11 and a concave arc surface that smoothly transitions to the convex arc surface. The concave arc surface is disposed between the convex arc surface and the end face 325, and the concave arc surface smoothly transitions to the end face 325. On the first plane, the end face includes a straight line arranged in the same direction as the lips and tongue, and the second position point 12 is located closest to the first position point 11 in the direction of the lips and tongue. In this way, there are no obvious sharp edges at the junction of the first surface 310 and the end face 325. When touched by hand, it is not rough. And / or, after contact with the tongue and / or lips, it is not easy to produce a foreign body sensation, etc.

[0155] Specifically, in this embodiment, α = 61° or 63.8°.

[0156] Referring back to Figures 6 and 7, in some embodiments, the first surface 310 includes a concave arc surface with a first position point 11 and a convex arc surface that smoothly transitions to the concave arc surface. The convex arc surface is disposed between the concave arc surface and the end face 325, and the convex arc surface smoothly transitions to the end face 325. On the first plane, the end face includes a straight line arranged in the same direction as the lips and tongue, and the second position point 12 is located closest to the first position point 11 in the direction of the lips and tongue. In this way, there are no obvious sharp edges at the junction of the first surface 310 and the end face 325. When touched by hand, it is not rough. And / or, after contact with the tongue and / or lips, it is not easy to produce a foreign body sensation, etc.

[0157] Specifically, in this embodiment, α = 67.5° or 68°.

[0158] Referring back to Figures 8 and 9, in some embodiments, on the first plane, the first surface 310 is an inclined plane, and the end face 325 is a plane arranged in the same direction as the lips and tongue, with a smooth transition between the first surface 310 and the end face 325. And / or, on the first plane, the end face includes a straight line arranged in the same direction as the lips and tongue, and the second position point 12 is located closest to the first position point 11 in the direction of the lips and tongue. This ensures that there are no obvious sharp edges at the junction of the first surface 310 and the end face 325. When touched by hand, it is not rough. And / or, after contact with the tongue and / or lips, it is less likely to cause a foreign body sensation.

[0159] Specifically, in this embodiment, α = 56.4° or 72°.

[0160] Referring back to Figures 10 and 11, in some embodiments, the first surface 310 is a convex arc surface, and the end face 325 is a partially spherical surface, with a smooth transition between the first surface 310 and the end face 325. This ensures that the junction between the first surface 310 and the end face 325 has no obvious sharp edges. It is not rough to the touch, and / or, it does not easily cause a foreign body sensation when in contact with the tongue and / or lips.

[0161] Specifically, in this embodiment, α = 64.7° or 65°.

[0162] Referring back to Figure 12, in some embodiments, the minimum distance between the first position point and the second position point along the lip and tongue direction is L2, where 0.05mm ≤ L2 ≤ 2.5mm. Thus, by optimizing the minimum distance data between the first and second position points, selecting from 0.05mm ≤ L2 ≤ 2.5mm, the traction component descends smoothly and with a reasonable drop along the direction away from the limiting body, reducing the feeling of foreign objects.

[0163] In some embodiments, 0.1mm ≤ L2 ≤ 1.4mm. Thus, by further optimizing the minimum distance data between the first position point and the second position point, and selecting from 0.1mm ≤ L2 ≤ 1.4mm, the traction component descends smoothly and with a small drop along the direction away from the limiting body, further reducing the feeling of foreign objects.

[0164] Optionally, in some embodiments, 0.05mm ≤ L2 ≤ 0.2mm. Thus, within this numerical range, the traction member 300 has a smaller drop in the labial-lingual direction, which can also ensure that the orthodontic appliance 10 has good comfort.

[0165] Optionally, in some embodiments, 0.2mm ≤ L2 ≤ 0.5mm. In this range, the lip-tongue drop of the traction element is small, which can also ensure that the orthodontic appliance 10 has good comfort.

[0166] Optionally, in some embodiments, 0.5mm ≤ L2 ≤ 0.8mm. Within this range, the labial-lingual drop of the traction element 300 is suitable, allowing it to cooperate with the bracket element 100 and the cover element 200 to form an arcuate shape, enabling the orthodontic appliance 10 to conform to the mucosa and provide good comfort. Furthermore, it can cooperate with the archwire groove to form an inward-facing appearance on the gingival side, further conforming to the mucosa and reducing the feeling of a foreign body.

[0167] Optionally, in some embodiments, 0.8mm ≤ L2 ≤ 1.1mm. Within this range, the traction element 300 has a suitable labial-lingual drop, allowing it to cooperate with the bracket element 100 and the cover element 200 to form an arcuate shape, ensuring the orthodontic appliance 10 conforms to the mucosa and provides good comfort. Furthermore, it can cooperate with the archwire groove to form an inward-facing appearance on the gingival side, further conforming to the mucosa and reducing the feeling of a foreign body.

[0168] Optionally, 1.1mm < L2 ≤ 1.4mm. In this range, even though the lip-tongue drop of the traction element is relatively large, the orthodontic appliance 10 can still ensure good comfort.

[0169] Optionally, in some embodiments, L2 is one of the following: 0.1mm, 0.11mm, 0.15mm, 0.16mm, 0.2mm, 0.21mm, 0.25mm, 0.3mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.61mm, 0.65mm, 0.7mm, 0.75mm, 0.79mm, 0.8mm, 0.82mm, 0.85mm, 0.9mm, 0.95mm, 1mm, 1.02mm, 1.05mm, 1.1mm, 1.11mm, 1.15mm, 1.2mm, 1.22mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, etc.

[0170] Optionally, in any of the above embodiments, and in some embodiments, the outer surface and edges of the bracket are rounded (e.g., rounded corners, deburred, or polished). This makes the orthodontic appliance more rounded and smooth, without obvious sharp edges.

[0171] Optionally, in any of the above embodiments, and in some embodiments, the outer surface and edges of the cover are rounded (e.g., rounded corners, deburred, or polished). This makes the orthodontic appliance more rounded and smooth, without obvious sharp edges.

[0172] Optionally, in any of the above embodiments, and in some embodiments, the outer surface and edges of the traction element are rounded (e.g., rounded corners, deburred, or polished). This makes the orthodontic appliance more rounded and smooth, without obvious sharp edges.

[0173] In some embodiments described above, a hook groove is provided between the traction member and the limiting body. The orthodontic appliance also includes a locking member, which includes a buckle body and a pressing body fixedly connected to the buckle body. The buckle body engages with the hook groove to secure the pressing body within the archwire groove. At least a portion of the buckle body smoothly connects to the first surface and / or the second surface. Thus, the locking member is securely connected to the orthodontic appliance via the buckle body, and the pressing body is used to press the archwire, facilitating the fixation of the archwire.

[0174] At least a portion of the buckle body smoothly connects with the first and / or second surfaces, ensuring a smooth connection between the locking element and the limiting element and / or traction element. This reduces the likelihood of a foreign body sensation during the user's wearing of the orthodontic appliance, thus improving the user experience and wearing comfort.

[0175] In any of the above embodiments, some embodiments, the orthodontic appliance further includes a locking element (not shown), which cooperates with the bracket to at least secure the cover element in a closed state.

[0176] It should be noted that there are various ways to implement the locking mechanism, including but not limited to screw locking, elastic locking, etc., which can be achieved in traditional technologies and will not be elaborated on here.

[0177] Optionally, the carrier includes a base. This facilitates a secure connection between the base and the teeth.

[0178] It should be noted that the "fitting body" can be "part of the bracket", that is, the "fitting body" is integrally formed with "other parts of the bracket, such as the carrier"; or it can be an independent component that can be separated from "other parts of the bracket, such as the carrier", that is, the "fitting body" can be manufactured independently and then combined with "other parts of the bracket, such as the carrier" to form a whole.

[0179] Equivalently, "a certain body" or "a certain part" can be a portion of the corresponding "component," meaning that "a certain body" or "a certain part" is integrally formed and manufactured with the "other parts of the component"; or it can be an independent component that can be separated from the "other parts of the component," meaning that "a certain body" or "a certain part" can be manufactured independently and then combined with the "other parts of the component" to form a whole. The expression of "a certain body" or "a certain part" in this application is merely one embodiment for ease of reading, and is not intended to limit the scope of protection of this application. Any technical solution that includes the above features and has the same function should be understood as an equivalent technical solution of this application.

[0180] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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 by, The orthodontic appliance has a labiolingual direction, a maxillogingival direction, and a mesiodistal direction. The orthodontic appliance includes: The bracket includes a carrier, a limiting body, and a mating body. The carrier has a bowwire bearing surface, and the limiting body and the mating body are fixedly disposed on both sides of the bowwire bearing surface at intervals to form a bowwire groove. A cover member, which is slidably connected to the mating body, and has a closed state (closing the archwire groove) and an open state (opening the archwire groove); and A traction component, which is fixedly connected to the limiting body; In the first plane, the archwire bearing surface is provided with a first center line, which is arranged in the same direction as the lip and tongue. The traction member is provided with a first position point at a vertical distance L1 from the first center line, where 0.82mm≤L1≤1.67mm. On the first plane, the traction member is provided with a second position point, which is closest to the gingival end in the gingival direction compared to other points on the traction member; The angle between the line segment connecting the first position point and the second position point and the direction of the lips and tongue is α, where 30°≤α<90°; The orthodontic appliance includes a connecting outer surface passing through the first position point and the second position point. The connecting outer surface is smoothly connected to the outer surface of the limiting body. The connecting outer surface is gradually moved closer to the carrier along the direction from the first position point to the second position point. The first plane includes the side view projection surface of the orthodontic appliance.

2. An orthodontic appliance, characterized in that, The orthodontic appliance has a labiolingual direction, a maxillogingival direction, and a mesiodistal direction. The orthodontic appliance includes: The bracket includes a carrier, a limiting body, and a mating body. The carrier has an archwire bearing surface. The limiting body and the mating body are fixedly disposed on both sides of the archwire bearing surface at a distance to form an archwire groove. The bracket has a side surface, and the side surface and the archwire groove are spaced apart along the gingival direction. A cover member, which is slidably connected to the mating body, and has a closed state (closing the archwire groove) and an open state (opening the archwire groove); and A traction component, which is fixedly connected to the limiting body; In the first plane, the side surface includes a first trajectory line closest to the gingival end, the archwire bearing surface has a first center line, and the first center line is arranged in the same direction as the labial and lingual direction; a point A is provided on the first trajectory line, and the distance from point A to the first center line is the shortest compared to other points on the first trajectory line; the orthodontic appliance has a dividing line parallel to the first center line, the dividing line passes through point A, and intersects with one of the contour lines of the traction member and the contour line of the limiting body to form a first position point; On the first plane, the traction member is provided with a second position point, which is closest to the gingival end in the gingival direction compared to other points on the traction member; The angle between the line segment connecting the first position point and the second position point and the direction of the lips and tongue is α, where 30°≤α<90°; The orthodontic appliance also includes a connecting outer surface passing through the first position point and the second position point. The connecting outer surface is smoothly connected to the outer surface of the limiting body. The connecting outer surface is gradually moved closer to the carrier along the direction from the first position point to the second position point. The first plane includes the side view projection surface of the orthodontic appliance.

3. The orthodontic appliance according to claim 1 or 2, characterized in that, 45°≤α≤75°。 4. The orthodontic appliance according to claim 1 or 2, characterized in that, 45°≤α≤50°; or, 50°≤α≤55°; or, 55°≤α≤65°; or, 65°≤α≤75°.

5. The orthodontic appliance according to claim 1 or 2, characterized in that, The connecting outer surface extends smoothly from the first location point to the second location point.

6. The orthodontic appliance according to claim 5, characterized in that, The connecting outer surface includes a first surface and an end face connected to the first surface. The first position point is located on the first surface, and the second position point is located on the end face. The first surface and the end face have a smooth transition.

7. The orthodontic appliance according to claim 6, characterized in that, The first surface is a convex arc surface, and the end face is also a convex arc surface, with a smooth transition between the first surface and the end face; Alternatively, the first surface is a convex arc surface, and the end face is also a convex arc surface, with the first surface and the end face smoothly transitioning; on the first plane, the end face includes a straight line arranged in the same direction as the lip and tongue direction, and the second position point is located closest to the first position point in the lip and tongue direction; Alternatively, on the first plane, the first surface is an inclined plane, the end face is an arc surface, and the first surface and the end face are smoothly transitioned; and / or, on the first plane, the end face includes a straight line arranged in the same direction as the lip and tongue direction, and the second position point is located closest to the first position point in the lip and tongue direction; Alternatively, the first surface is a convex arc surface, the end face is a partially spherical surface, and the first surface and the end face are smoothly transitioned; Alternatively, the first surface includes an outwardly convex arc surface with the first position point and an inwardly concave arc surface that smoothly transitions to the outwardly convex arc surface, the inwardly concave arc surface being disposed between the outwardly convex arc surface and the end face, and the inwardly concave arc surface smoothly transitioning to the end face; and / or, on the first plane, the end face includes a straight line arranged in the same direction as the lip and tongue direction, and the second position point is located closest to the first position point in the lip and tongue direction; Alternatively, the first surface includes a concave arc surface with the first position point and a convex arc surface that smoothly transitions to the concave arc surface, the convex arc surface being disposed between the concave arc surface and the end face, and the convex arc surface smoothly transitioning to the end face; and / or, on the first plane, the end face includes a straight line arranged in the same direction as the lip and tongue direction, and the second position point is located closest to the first position point in the lip and tongue direction.

8. The orthodontic appliance according to claim 1, characterized in that, 0.82mm≤L1≤0.92mm; or, 0.92mm≤L1≤1.2mm; or, 1.2mm≤L1≤1.4mm.

9. The orthodontic appliance according to claim 1 or 2, characterized in that, Along the lip and tongue direction, the minimum distance between the first position point and the second position point is L2, 0.05mm≤L2≤2.5mm.

10. The orthodontic appliance according to claim 9, characterized in that, 0.1mm≤L2≤1.4mm.

11. The orthodontic appliance according to claim 9, characterized in that, 0.05mm≤L2≤0.2mm; or, 0.2mm≤L2≤0.5mm; or, 0.5mm≤L2≤0.8mm; or, 0.8mm≤L2≤1.1mm; or, 1.1mm<L2≤1.4mm.

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