Self-locking orthodontic appliance and orthodontic system

Abstract

The utility model relates to a self-locking orthodontic appliance and orthodontic system.The self-locking orthodontic appliance comprises a bottom plate, a main body and a cover body, a first groove is formed in the first end of the main body, the first groove is adjacent to the cover body under the condition that an arch wire groove is closed by the cover body, and a second groove is formed in the position, close to the first groove, of the top of the cover body; the second groove is communicated with the first groove, and the side wall of the second groove is an inclined plane and / or a straight plane and / or an arc surface. Therefore, no offset exists at the connecting position of the cover body and the first groove, the end face, facing the first groove, of the cover body cannot form a stress face, and a patient is not prone to frequently opening / closing the cover body by himself or herself without the help of a special opening tool. Furthermore, the service life of the cover body can be ensured, and the cover body is prevented from beforehand failure.

Description

TECHNICAL FIELD

[0001] The utility model relates to orthodontic technical field, especially a kind of self-locking orthodontic appliance and orthodontic system. BACKGROUND

[0002] Self-locking orthodontic appliance usually includes self-locking bracket and self-locking buccal tube, etc., they are important components needed to be used in the process of tooth correction. Figure 1 And Figure 2 As shown in the drawings, existing self-locking orthodontic appliance 1 on the market mainly includes bottom plate 11, main body 12, cover 13 and elastic component (not shown in the drawings), the first end 14 of main body 12 is provided with opening recess 15, under normal circumstances, by inserting special opening tool into opening recess 15, cover 13 is forced to slide relative to main body 12, and by the cooperation between main body 12, cover 13 and elastic component, cover 13 opening arch wire groove 16 is realized. When it is needed to close arch wire groove 16, cover 13 is pushed to slide in the opposite direction, and by the cooperation between main body 12, cover 13 and elastic component, arch wire groove 16 can be closed.

[0003] However, due to the existence of gap (also can be called height difference, such as Figure 1 Indicated in A of the drawings) between the connection of cover 13 and opening recess 15, the end surface of cover 13 towards opening recess 15 forms stress surface (such as Figure 2 Indicated in B of the drawings), so that patients can open / close cover 13 frequently without the help of special opening tool. Because the service life of cover 13 is certain, if patients open / close cover 13 frequently, it is easy to reach the limit of cover 13 opening / closing life, and accelerate the failure of cover 13. INVENTION CONTENTS

[0004] Therefore, it is necessary to provide a kind of self-locking orthodontic appliance and orthodontic system that can effectively avoid patients opening / closing cover 13 for the above technical problems.

[0005] A self-locking orthodontic appliance, comprising a base plate, a main body and a cover, the main body is arranged on the base plate, the main body is provided with an archwire slot in the mesial-distal direction, the opposite sides of the archwire slot are respectively a first end and a second end, the first end and the outer surface of the cover are smooth curved surfaces, the cover is arranged on the top of the second end of the main body and is slidable relative to the main body to open or close the archwire slot, the first end of the main body is provided with a first groove, the first groove is adjacent to the cover when the cover closes the archwire slot, the top of the cover is provided with a second groove near the first groove, the second groove is in communication with the first groove, and the side wall of the second groove towards the first groove is a beveled plane and / or a straight plane and / or an arc surface, so as to eliminate or reduce the gap at the connection between the cover and the first groove, thereby eliminating the stress surface.

[0006] In one of the embodiments, the first groove is an opening position, and / or the second groove is an opening position.

[0007] In one of the embodiments, the width of the opening of the second groove towards the first groove is greater than or equal to the width of the opening of the first groove.

[0008] In one of the embodiments, a fillet or a chamfer is arranged at the connection between the side wall of the second groove towards the first groove and the top surface of the cover.

[0009] In one of the embodiments, the depth of the second groove is less than the depth of the first groove.

[0010] In one of the embodiments, the side wall of the second groove does not extend to the side surface of the cover away from the first end.

[0011] In one of the embodiments, the side wall of the second groove towards the first groove is an inner concave arc surface or an outer convex arc surface.

[0012] In one of the embodiments, the top of the cover is provided with an axis inclination line or an axis inclination groove, and the axis inclination line or the axis inclination groove extends to the second groove; and / or

[0013] the top of the first end is provided with an axis inclination line or an axis inclination groove, and the axis inclination line or the axis inclination groove extends to the first groove.

[0014] In one of the embodiments, the first groove is substantially rectangular or trapezoidal; or

[0015] the first groove is substantially semicircular.

[0016] An orthodontic system, comprising at least two self-locking orthodontic appliances as claimed in any one of the above.

[0017] The self-locking orthodontic appliance has at least the following advantages:

[0018] Since the first end of the main body is provided with the first groove, the first groove is adjacent to the cover body when the cover body closes the archwire slot, the top of the cover body is provided with the second groove near the first groove, the second groove is in communication with the first groove, and the sidewall of the second groove is a beveled plane and / or a straight plane and / or an arc surface. Therefore, there is no gap at the connection between the cover body and the first groove, the end surface of the cover body towards the first groove does not form a stress surface, and the patient cannot easily open / close the cover body frequently without the aid of a special opening tool. In turn, the service life of the cover body can be ensured, and the cover body can be prevented from failing prematurely. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve the purpose of explaining the present application, and do not constitute improper limitations on the present application.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and other accompanying drawings can be obtained by those skilled in the art without any creative effort on the premise of not paying any creative effort.

[0021] Figure 1 is a side view of the existing self-locking orthodontic appliance;

[0022] Figure 2 is a structural view of the existing self-locking orthodontic appliance from another perspective;

[0023] Figure 3 is a structural schematic view of the self-locking orthodontic appliance in the first embodiment;

[0024] Figure 4 is a front view of Figure 3 ;

[0025] Figure 5 is a side view of Figure 3 ;

[0026] Figure 6 is a sectional view of Figure 3 ;

[0027] Figure 7 is a structural schematic view of the self-locking orthodontic appliance in the second embodiment;

[0028] Figure 8 is a front view of Figure 7 ;

[0029] Figure 9 Structure diagram of self-locking orthodontic appliance in third embodiment;

[0030] Figure 10 Front view of Figure 9 ;

[0031] Figure 11 Side view of Figure 9 ;

[0032] Figure 12 Sectional view of Figure 9 .

[0033] BRIEF DESCRIPTION OF DRAWINGS

[0034] 1. Orthodontic appliance; 11. Base plate; 12. Main body; 13. Cover; 14. First end; 15. Opening groove; 16. Archwire slot.

[0035] 100. Self-locking orthodontic appliance; 110. Base plate; 120. Main body; 130. Cover; 121. Archwire slot; 122. First end; 123. Second end; 124. First groove; 131. Second groove; 132. Side wall of second groove facing first groove; 133. Fillet.

[0036] 200. Self-locking orthodontic appliance; 210. Base plate; 220. Main body; 230. Cover; 221. Archwire slot; 222. First end; 223. Second end; 224. First groove; 231. Second groove.

[0037] 300. Self-locking orthodontic appliance; 310. Base plate; 320. Main body; 330. Cover; 321. Archwire slot; 322. First end; 323. Second end; 324. First groove; 331. Second groove. DETAILED DESCRIPTION

[0038] It should be noted that the orthodontic appliance referred to in the present application refers to an orthodontic bracket or a buccal tube, or other appliances with similar functions and similar structures.

[0039] Unless otherwise specified, in the following structural description, the reference system of the maxillary teeth needs to be used to describe the embodiments of the present application, therefore, as used herein, the terms such as labial, lingual, mesial, distal, occlusal, gingival used to describe the orthodontic appliance are relative to the selected reference system. However, the embodiments of the present application are not limited to the selected reference system and the described terms, because the orthodontic appliance can be used for other teeth in the oral cavity and in other directions.

[0040] 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.

[0041] 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 surface and the gingival surface are opposite each other, and the direction formed by the occlusal surface and the gingival surface 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 surface and the lingual surface are opposite each other, and the direction formed by the labial surface and the lingual surface is also called the labiolingual direction. The two surfaces of the tooth that contact adjacent teeth are the mesial surface and the distal surface, the difference being their distance from the center; the direction formed by the two is also called the mesiodistal direction, or mesiodistal direction.

[0042] Furthermore, in the description of 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, and this is used to distinguish them.

[0043] First Embodiment

[0044] Please see Figures 3 to 6 The self-ligating orthodontic appliance 100 in the first embodiment is described in detail using an orthodontic bracket as an example. Of course, in other embodiments, the self-ligating orthodontic appliance 100 can also be a buccal tube.

[0045] The self-ligating orthodontic appliance 100 in the first embodiment includes a base plate 110, a main body 120, and a cover 130, with the main body 120 disposed on the base plate 110. For example, the main body 120 may be welded to the base plate 110, or the main body 120 may be integrally formed with the base plate 110. An archwire groove 121 is provided on the main body 120 along the mesiodistal direction, and the archwire groove 121 is mainly used to place the archwire (not shown in the figure). The archwire groove 121 has a first end 122 and a second end 123 on opposite sides, with the first end 122 being higher than the second end 123. The outer surfaces of the first end 122 and the cover 130 are both smooth curved surfaces, which can reduce irritation and damage to the oral mucosa and improve comfort.

[0046] The cover 130 is arranged on the top of the second end 123 of the main body 120 and is slidable relative to the main body 120 to open or close the archwire slot 121. Specifically, the cover 130 can be slidably arranged on the top of the second end 123 by arranging a sliding rail on the cover 130 and correspondingly arranging a sliding groove on the top of the second end 123. The cover 130 is self-locked with the main body 120 by a locking mechanism. Since the locking mechanism is not the improvement point in the present embodiment, the locking mechanism can adopt any structure capable of achieving self-locking function in the prior art before the present application.

[0047] The first end 122 of the main body 120 is provided with a first groove 124 adjacent to the cover 130 when the cover 130 closes the archwire slot 121. The top of the cover 130 is provided with a second groove 131 adjacent to the first groove 124. Specifically, the first groove 124 and the second groove 131 can be arranged in the manner as shown in FIG. 2. Figure 4 and Figure 6 When the cover 130 is in the closed state, the first groove 124 is adjacent to the cover 130, and the second groove 131 is in communication with the first groove 124. That is, when the cover 130 is closed, the first groove 124 and the second groove 131 together form a groove structure with an open top.

[0048] Specifically, in the first embodiment, both the first groove 124 and the second groove 131 can be an opening position. An opening tool can act on the first groove 124 to push the cover 130 to slide away from the first end 122, thereby opening the archwire slot 121. The shape of the first groove 124 can have various forms, for example, the first groove 124 is generally semicircular, and a doctor can act on the semicircular first groove 124 by a probe or other opening tool to open the cover 130. Alternatively, in other embodiments, the first groove 124 can also be generally rectangular or trapezoidal. For example, the first groove 124 is a rectangular or trapezoidal structure with rounded corners, or the first groove 124 is a standard rectangular or trapezoidal structure, which should fall within the protection scope of the present application. Alternatively, the opening tool can also act on the second groove 131 to force the cover 130 to slide away from the first end 122, thereby opening the archwire slot 121. Similarly, the shape of the second groove 131 can also be semicircular, generally rectangular or trapezoidal.

[0049] Of course, in other embodiments, only the first groove 124 can be an opening position. That is, the opening tool can act on the first groove 124 to force the cover 130 to move to open the archwire slot 121. Alternatively, in some embodiments, only the second groove 131 can be an opening position. These ways can all achieve the purpose of opening the cover 130 and should fall within the protection scope of the present application.

[0050] Specifically in the first embodiment, the side wall 132 of the second groove 131 facing the first groove 124 is arc-shaped, so that the arc-shaped surface is not easy to form a stress surface. Therefore, there is no gap between the cover 130 and the first groove 124, and the end surface of the cover 130 facing the first groove 124 does not form a stress surface, so that the patient is not easy to open / close the cover 130 frequently without the help of a special opening tool. Further, the service life of the cover 130 can be guaranteed to prevent the cover 130 from failing prematurely. Of course, in other embodiments, the side wall 132 of the second groove 131 facing the first groove 124 can also be a bevel or a straight plane, which can achieve the purpose of eliminating the stress surface.

[0051] Specifically in the first embodiment, the side wall 132 of the second groove 131 facing the first groove 124 is an inner concave arc surface or an outer convex arc surface, which further reduces the risk of forming a stress surface and prevents the cover 130 from failing prematurely.

[0052] Specifically in the first embodiment, the width of the second groove 131 facing the opening of the first groove 124 is equal to the width of the opening of the first groove 124. In this way, the yield rate is higher during the demolding process during production.

[0053] Please refer to Figure 3 and 4 , the side wall 132 of the second groove 131 facing the first groove 124 is connected to the top surface of the cover 130 is provided with a rounded corner 133. In this way, the comfort of the entire self-locking orthodontic appliance 100 can be further improved. For example, in the first embodiment, the rounded corner 133 is arranged in the middle, which corresponds to the highest part of the top surface of the cover 130. On the one hand, the overall height is reduced, on the other hand, the roundness is increased, the comfort is improved, and on the other hand, the probability of opening the cover 130 without a special opening tool is further reduced, and the probability of the cover 130 failing prematurely is further reduced. Of course, in other embodiments, a flat corner can also be arranged at the connection between the side wall 132 of the second groove 131 facing the first groove 124 and the top surface of the cover 130, which can also achieve the purpose of improving comfort.

[0054] Please refer to Figure 6 , specifically in the first embodiment, the depth of the second groove 131 is less than the depth of the first groove 124. In this way, the opening tool such as a probe can be used to act on the first groove 124 to open / close the cover 130. Of course, in other embodiments, the depth of the second groove 131 can be equal to the depth of the first groove 124, and the shape of the second groove 131 is the same as that of the first groove 124.

[0055] Please refer to Figure 3 and 4In the first embodiment, the sidewall of the second groove 131 does not extend to the side surface of the cover 130 away from the first end 122. In this way, the overall contour of the self-ligating orthodontic appliance 100 is a rounded spherical or spherical-like structure, which can improve overall comfort and reduce foreign body sensation. Of course, in other embodiments, the sidewall of the second groove 131 can also extend to the side surface of the cover 130 away from the first end 122, in which case the height of the entire self-ligating orthodontic appliance 100 is reduced and the size is reduced.

[0056] In the first embodiment, the top of the first end 122 is provided with an axis inclination line (not shown in the figure), which extends to the first groove 124. For example, the axis inclination line can be formed by laser printing. The main function of the axis inclination line is to facilitate the positioning of the self-ligating orthodontic appliance 100. When the self-ligating orthodontic appliance 100 is pasted to the surface of the tooth, the axis inclination line is aligned with the clinical crown axis of the tooth, which makes it easier to paste the orthodontic appliance to the appropriate position of the tooth. Of course, in other embodiments, an axis inclination groove can also be provided on the top of the first end 122, which extends to the first groove 124. And / or, an axis inclination line or axis inclination groove can also be provided on the top of the cover 130, which extends to the second groove 131.

[0057] Second embodiment

[0058] Please refer to Figure 7 and 8 for a structural schematic diagram of the self-ligating orthodontic appliance 200 in the second embodiment. The structure of the self-ligating orthodontic appliance 200 in the second embodiment is mostly the same as that of the self-ligating orthodontic appliance 200 in the first embodiment, such as including a base plate 210, a main body 220 and a cover 230, and the main body 220 is arranged on the base plate 210. For example, the main body 220 can be welded on the base plate 210, and the main body 220 can also be integrally formed with the base plate 210. The main body 220 is provided with an archwire groove 221 in the mesial-distal direction, and the archwire groove 221 is mainly used to place an archwire (not shown in the figure). The opposite sides of the archwire groove 221 are respectively a first end 222 and a second end 223, the height of the first end 222 is higher than that of the second end 223, and the outer surface of the first end 222 and the outer surface of the cover 230 are both smooth curved surfaces, which can reduce the irritation and damage to the oral mucosa and improve the comfort. It should be noted that the top surface of the second end 223 is not the outer surface, and the outer surface refers to the surface of the second end 223 exposed to the outside.

[0059] The first end 222 of the main body 220 is provided with a first groove 224, and the first groove 224 is adjacent to the cover 230 when the cover 230 closes the archwire groove 221. The top of the cover 230 is provided with a second groove 231 near the first groove 224, and the second groove 231 is in communication with the first groove 224.

[0060] Referring to Figure 8 The difference between the self-ligating orthodontic appliance 200 in the second embodiment and the self-ligating orthodontic appliance 200 in the first embodiment includes but is not limited to that in the second embodiment, the width of the opening of the second groove 231 toward the first groove 224 is greater than the width of the opening of the first groove 224. In this way, the low point of the position of the cover 230 near the first groove 224 in the mesial-distal direction will be lower, and the effect of eliminating the gap will be better.

[0061] Third embodiment

[0062] Referring to Figures 9 to 12 is a structural schematic diagram of the self-ligating orthodontic appliance 300 in the third embodiment. The structure of the self-ligating orthodontic appliance 300 in the third embodiment is mostly the same as that of the self-ligating orthodontic appliance 300 in the first embodiment, such as also including the base plate 310, the main body 320 and the cover 330, and the main body 320 is arranged on the base plate 310. For example, the main body 320 can be welded on the base plate 310, and the main body 320 can also be integrally formed with the base plate 310. The main body 320 is provided with an archwire groove 321 in the mesial-distal direction, and the archwire groove 321 is mainly used to place the archwire (not shown in the figure). The opposite sides of the archwire groove 321 are respectively the first end portion 322 and the second end portion 323, the height of the first end portion 322 is higher than that of the second end portion 323, and the outer surface of the first end portion 322 and the outer surface of the cover 330 are both smooth curved surfaces, which can reduce the irritation and damage to the oral mucosa and improve the comfort. It should be noted that the top surface of the second end portion 323 is not the outer surface, and the outer surface refers to the surface of the second end portion 323 exposed to the outside.

[0063] The first end portion 322 of the main body 320 is provided with a first groove 324, and the first groove 324 is adjacent to the cover 330 when the archwire groove 321 is closed by the cover 330. The top of the cover 330 is provided with a second groove 331 near the first groove 324, and the second groove 331 is in communication with the first groove 324.

[0064] Referring to Figure 10 and 12The difference between the self-locking orthodontic appliance 300 in the third embodiment and the self-locking orthodontic appliance 300 in the first embodiment includes but is not limited to that, in the third embodiment, only the first groove 324 is used as an opening position, and the second groove 331 is not used as an opening position. Thus, the structure of the second groove 331 in the third embodiment is different from the structure of the second groove 331 in the first embodiment. For example, in the third embodiment, the width of the second groove 331 along the mesial-distal direction toward the opening of the first groove 324 is larger than the width of the second groove 331 along the mesial-distal direction toward the opening of the first groove 324 in the first embodiment. Thus, the low point of the position of the cover 330 close to the first groove 324 in the mesial-distal direction is lower, and the effect of eliminating the gap is better. In addition, in the third embodiment, the width of the second groove 331 along the gingival direction is larger than the width of the second groove 331 along the gingival direction in the first embodiment. In the third embodiment, the depth of the second groove 331 is smaller than the depth of the second groove 331 in the first embodiment, which prevents dirt accumulation.

[0065] The present application also provides an orthodontic system, which comprises at least two self-locking orthodontic appliances, and the self-locking orthodontic appliance can be any one of the first to sixth embodiments described above. For example, the orthodontic system comprises twenty self-locking orthodontic appliances, and the twenty self-locking orthodontic appliances are respectively used for being attached to the tooth surfaces of a patient, the cover is opened, the arch wire is placed in the arch wire groove, and then the cover is closed, and the arch wire is limited in the arch wire groove.

[0066] The technical features of the above-described embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0067] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

[0068] In the description of the utility model, it is understood that the orientation or positional relationship indicated by 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" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0069] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0070] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0071] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0072] It is to be understood that the terms "including", "comprising", "incorporating", "having" or "containing" or the like are used inclusively and are not exclusionary or open ended. For example, a composition, process or method that includes (or includes the presence of) elements A, B and C can also include (or include the presence of) one or more additional elements or steps, whether or not specifically listed. A description utilizing terms such as "comprising" or "containing" to describe a combination shall also be applicable to elements or steps of for example, "consisting of" or "consisting essentially of".

Claims

1. A self-ligating orthodontic appliance, characterized in that, The device includes a base plate, a main body, and a cover. The main body is disposed on the base plate. A bowwire groove is provided on the main body along the mesial-distal direction. The bowwire groove has a first end and a second end on opposite sides. The outer surfaces of the first end and the cover are smooth curved surfaces. The cover is disposed on the top of the second end of the main body and is slidable relative to the main body to open or close the bowwire groove. A first groove is provided on the first end of the main body. When the bowwire groove is closed, the first groove is adjacent to the cover. A second groove is provided on the top of the cover near the first groove. The second groove is connected to the first groove. The sidewall of the second groove facing the first groove is an inclined plane and / or a straight plane and / or an arc surface to eliminate or reduce the discontinuity at the connection between the cover and the first groove, thereby eliminating the stress surface.

2. The self-ligating orthodontic appliance according to claim 1, characterized in that, The first groove is the opening position, and / or the second groove is the opening position.

3. The self-ligating orthodontic appliance according to claim 2, characterized in that, The width of the opening of the second groove toward the first groove is greater than or equal to the width of the opening of the first groove.

4. The self-ligating orthodontic appliance according to claim 2, characterized in that, The second groove has a rounded or flattened corner at the junction of its sidewall facing the first groove and the top surface of the cover.

5. The self-ligating orthodontic appliance according to claim 1, characterized in that, The depth of the second groove is less than the depth of the first groove.

6. The self-ligating orthodontic appliance according to claim 5, characterized in that, The sidewall of the second groove may or may not extend to the side surface of the cover away from the first end.

7. The self-ligating orthodontic appliance according to claim 1, characterized in that, The sidewall of the second groove facing the first groove is either an inwardly concave arc surface or an outwardly convex arc surface.

8. The self-ligating orthodontic appliance according to claim 1, characterized in that, The top of the cover is provided with an axial tilt line or an axial tilt groove, the axial tilt line or axial tilt groove extending to the second groove; and / or The top of the first end is provided with an axial tilt line or an axial tilt groove, which extends to the first groove.

9. The self-ligating orthodontic appliance according to claim 1, characterized in that, The first groove is roughly rectangular or trapezoidal; or The first groove is roughly semi-circular.

10. An orthodontic system, characterized in that, It includes at least two self-ligating orthodontic appliances as described in any one of claims 1 to 9.

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