Double-arch-wire correction system with high connection stability

Abstract

The invention discloses a double-arch-wire correction system with high connection stability. The double-arch-wire correction system comprises a first arch wire, a second arch wire, a lock cover, a bracket, a pressing wing and an elastic pin shaft, in a wearing state, the elastic pin shaft is in a reset state, the elastic pin shaft drives the pressing wing to act on the lock cover, and the lock cover is tightly buckled on the bracket. In the daily feeding process of a patient, the locking cover on each tooth position is firmly locked on the bracket, so that the locking cover is not easy to loosen due to the stuffing of food residues. In addition, even if the appliance is worn for a long time, dental calculus is not easy to accumulate around the pressing wings, so that the pressing unlocking of the appliance is easier; meanwhile, due to the fact that the pressing wing pries the lock cover from the bottom through rotation, the two sides of the lock cover need to be pinched by hands and pulled out forcibly in the past, the lock cover can be driven to be separated in a more labor-saving mode, a doctor only needs to slightly press the pressing wing to complete unlocking, convenience is remarkably improved, the pain of a patient is relieved, and the time beside a revival chair is shortened.

Description

Technical Field

[0001] The invention relates to the field of oral orthodontics, and in particular to a double archwire correction system with high connection stability. Background Art

[0002] Most fixed orthodontic appliances use a single archwire to control tooth movement. The single archwire has limited control over the movement of teeth in three dimensions, such as the torque of teeth, anchorage control, and the movement of single teeth, and its control effect is not ideal. Especially for some orthodontic cases that need to obtain correction space by tooth extraction, the extraction gap needs to be closed after the teeth are aligned. In the process of closing the gap, some new malocclusion problems may arise; for example, for cases where the posterior teeth need to be moved in the mesiodistal direction, although the traditional fixed orthodontic appliance can roughly release enough correction force, it cannot accurately control the movement trajectory of the teeth. The posterior teeth are prone to mesiodistal tilt during the mesiodistal movement, which will directly lead to malocclusion problems such as deepening of the anterior teeth overbite and lingual inclination of the crowns.

[0003] The traditional approach is to make some special bends at certain specific locations on the archwire to enhance the control of the archwire on certain tooth positions. However, since there will be some deviations in the theoretical calculation stage and the actual operation stage of the special bends, and the degree of deviation cannot be predicted, the archwire may not meet expectations after actual bending, or may bring some new problems, bringing new uncertainties to the correction.

[0004] In response to the above problems, the applicant has independently developed several dual-archwire fixed correction systems, and has obtained patent authorizations. Please refer to: China Utility Model No. CN220175265U - A Slidable Dual-archwire Fixed Correction System, and China Utility Model No. CN221712268U - A Low-friction Archwire Sliding Correction System. Both of the above correction systems adopt a dual-archwire control structure, both of which include a main archwire and an auxiliary archwire. The two archwires are connected to a lock cover, which serves as an intermediate connector, and then the lock cover is pressed and buckled onto the bracket. Under the joint action of the main archwire and the auxiliary archwire, the control of the torque, axial inclination, and torsion of the teeth is enhanced.

[0005] However, after multiple tests and clinical applications, the applicant found that the above-mentioned double archwire fixed correction system still has certain defects. When worn, the bracket and the archwire are engaged through the groove, and the bracket and the lock cover are also engaged through the groove; that is, the wearing and removal of the archwire are both locked or released in a manner similar to a buckle connection. Although such a matching structure is simple, easy to process, and convenient to wear and remove, however, during the long-term wearing of the braces, when eating, food residues are easily stuck in the gap between the arch wire and the teeth, and the locking cover is easily pried loose, causing the locking cover and the arch wire to fall off in the mouth; and, since oral hygiene cleaning is difficult to be fully implemented during orthodontic treatment, tartar will accumulate around the brackets, and an orthodontic cycle requires the replacement of multiple sets of arch wires. When replacing the arch wires, the locking cover is manually pinched on both sides to force it out of the bracket, and the tartar tightly attached to the bracket and the locking cover will increase the difficulty of removing the locking cover, and it can only be removed by brute force, causing problems such as arch wire deformation or bracket falling off, and will also cause pain and discomfort to the patient. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a double-wire correction system with high connection stability, which can solve the problem that the locking cover and archwire of the existing double-wire correction system are easy to loosen and difficult to remove.

[0007] The present invention is achieved through the following technical solutions:

[0008] A double archwire correction system with high connection stability comprises: a first archwire and a second archwire; a locking cover, which is provided with a first archwire hole and a second archwire hole; the first archwire is fixedly inserted or slidably inserted into the first archwire hole, and the second archwire is fixedly inserted into the second archwire hole; a bracket, comprising a base plate and a body protruding from the base plate; a pressing wing mounting groove is recessed on the body; the pressing wing is rotatably connected to the pressing wing mounting groove through an elastic pin shaft, the pressing wing has a pressing portion, and the pressing portion protrudes out of the body; the elastic pin shaft is inserted into the body and the pressing wing; the locking cover is buckled on the bracket, and the pressing wing is pressed against the locking cover; when the elastic pin shaft is in a reset state, it drives the pressing wing to act on the locking cover, so that the locking cover is fastened to the bracket.

[0009] Furthermore, the pressing wing also has an ejection lock, and the ejection lock and the pressing part are respectively located on two opposite ends of the pressing wing; when the locking cover is buckled on the bracket, the ejection lock presses against the bottom of the locking cover, so that when the pressing wing is pressed and rotated, the ejection lock pushes the locking cover out of the bracket.

[0010] Furthermore, the mating surface of the ejection lock buckle that abuts against the lock cover is a smooth arc surface.

[0011] Further, the bottom of the lock cover is convexly provided with a first archwire mounting portion and a second archwire mounting portion, the first archwire hole and the second archwire hole are respectively provided on the first archwire mounting portion and the second archwire mounting portion; a body accommodating cavity is provided in the body of the bracket, and the first archwire mounting portion of the lock cover is inserted into the body accommodating cavity; a limiting convex strip is provided on the inner side wall of the body accommodating cavity, and a limiting groove is provided on the outer side wall of the first archwire mounting portion of the lock cover, and the limiting convex strip and the limiting groove are engaged with each other through an arc surface to limit the lock cover from coming out of the bracket. .

[0012] Furthermore, a first arch wire mounting portion and a second arch wire mounting portion are convexly provided at the bottom of the locking cover, and the first arch wire hole and the second arch wire hole are respectively opened on the first arch wire mounting portion and the second arch wire mounting portion; a body accommodating cavity is opened in the body of the bracket, and the first arch wire mounting portion of the locking cover is inserted into the body accommodating cavity; the first arch wire mounting portion of the locking cover has protruding first limiting wings and second limiting wings extending in opposite directions along the gingival and jaw directions; a first concave portion is provided in the body accommodating cavity of the bracket, and a second concave portion is provided on the side of the pressing wing; when the locking cover is buckled on the bracket, the first limiting wing and the second limiting wing are respectively buckled in the first concave portion and the second concave portion to limit the locking cover from falling out of the bracket.

[0013] Furthermore, a lower wing limiting convex strip is protruded from the bottom of the pressing wing mounting groove, and a lower wing limiting groove is provided at the bottom of the pressing wing; when the locking cover is buckled on the bracket, the lower wing limiting convex strip is engaged in the lower wing limiting groove through an arc surface to limit the shaking of the pressing wing in its rotation direction; when the pressing wing is pressed and rotated, the lower wing limiting groove passes over the lower wing limiting convex strip to release the limitation.

[0014] Furthermore, a first archwire groove is recessed at the top of the body accommodating cavity; when the locking cover is buckled on the bracket, the first archwire is accommodated in the first archwire groove.

[0015] Furthermore, a second arch wire accommodating portion is recessed on the body of the bracket; when the locking cover is buckled on the bracket, the second arch wire mounting portion is spanned in the second arch wire accommodating portion.

[0016] Furthermore, the pressing part of the pressing wing is provided with an anti-slip groove on the surface, and the anti-slip groove includes: a strip-shaped anti-slip groove and a point-shaped anti-slip groove; the strip-shaped anti-slip groove is a long strip-shaped structure, and its two ends pass through the two sides of the pressing part; the point-shaped anti-slip groove is suitable for the tip of the orthodontic tool to be inserted; the point-shaped anti-slip groove is connected to the strip-shaped anti-slip groove.

[0017] Furthermore, an undercut structure for increasing static friction is provided in the second arch wire hole of the locking cover, so that the second arch wire is fixedly clamped in the second arch wire hole; or, the second arch wire is welded and fixed in the second arch wire hole; the first arch wire hole is a square hole or a round hole; the first arch wire is a straight arch wire, and the second arch wire is a multi-curved wire, and the multi-curved wire is bent with a plurality of curved structures for releasing correction force.

[0018] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0019] The first archwire and the second archwire are pre-assembled on several locking covers, and the three are put into the patient's mouth as an integrated wearable component, and the locking covers are pressed into the brackets on each tooth position one by one, and the locking covers are snapped into the body of the bracket; at this time, the pressing wings are pressed against the locking covers, and because of the continuous restoring force of the elastic pin, the pressing wings keep the tendency of pressing the locking covers to prevent the locking covers from falling out of the brackets. In the wearing state, the connection between the locking covers and the brackets is stable. During the patient's daily eating process, food residues are stuck in the gap between the archwire and the bracket. Since the locking covers on each tooth position are firmly locked on the bracket, the wearable component (the connection between the locking covers and the first and second archwires) is not easy to loosen.

[0020] When the archwire needs to be replaced or removed, the pressing wing protruding from the outside of the bracket is pressed manually, and the pressing wing rotates, and the elastic pin shaft changes to a compressed state, and the pressing wing pries the lock cover upward from the bottom, so that the lock cover is disengaged from the bracket, and the spring is reset; after each lock cover is disengaged from the bracket, the archwire can be taken out of the oral cavity. Even if the brace is worn for a long time, tartar accumulates and adheres to the bracket. Since the pressing wing obviously protrudes to the outside of the bracket, it is not easy to accumulate tartar around it, so the press unlocking of the present invention is not easily affected by the accumulation of tartar, and it is easier to unlock; at the same time, since the pressing wing rotates and pries the lock cover from the bottom, in the whole mechanical system, the elastic pin shaft and the pressing wing respectively act as a fulcrum and a lever. In the past, it was necessary to pinch the two sides of the lock cover tightly by hand and pull it out forcefully. The present invention can drive the lock cover to come out more labor-savingly, and the doctor only needs to gently press the pressing wing to complete the unlocking, which significantly improves the convenience, reduces the pain of the patient, and effectively shortens the chairside time of the patient during the follow-up visit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1Shown is a schematic diagram of a wearing state of the first embodiment of the present invention;

[0022] Figure 2 Shown Figure 1 A front view of

[0023] Figure 3 Shown Figure 1 Left view of

[0024] Figure 4 FIG. 1 is a schematic diagram showing the separation of the wearing piece and the bracket of the first embodiment;

[0025] Figure 5 Shown is a cross-sectional view of the first embodiment in a wearing state;

[0026] Figure 6 The figure shows the comparison between the pressing wing in the natural reset state and the pressed state;

[0027] Figure 7 Shown is a schematic structural diagram of the bracket of the first embodiment;

[0028] Figure 8 Shown is a schematic structural diagram of the lock cover of the first embodiment;

[0029] Fig. 9 The figure shows a schematic structural diagram of the pressing wing of the first embodiment;

[0030] Fig.10 Shown is a cross-sectional view of the second embodiment in a worn state.

[0031] In the figure: 10, first archwire; 20, second archwire; 30, lock cover; 31, first archwire hole; 32, second archwire hole; 33, limiting groove; 34, first archwire mounting portion; 35, second archwire mounting portion; 36, first limiting wing; 37, second limiting wing; 40, bracket; 41, bottom plate; 42, body; 43, pressing wing mounting groove; 44, limiting convex strip; 45, body accommodating cavity; 46, first archwire groove; 47, second archwire accommodating portion; 48, upper ligation groove; 49, lower ligation groove; 410, first inverted concave portion; 411, lower wing limiting convex strip; 50, pressing wing; 51, pressing portion; 52, ejection lock buckle; 53, strip anti-skid groove; 54, dot anti-skid groove; 55, second inverted concave portion; 56, lower wing limiting groove; 60, elastic pin. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0033] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See also Figure 1-Figure 5 The present invention discloses a double archwire correction system with high connection stability, comprising: a first archwire 10, a second archwire 20, a locking cover 30, a bracket 40, a pressing wing 50 and an elastic pin 60. The locking cover 30 is provided with a first archwire hole 31 and a second archwire hole 32. The first archwire 10 is slidably inserted or fixedly inserted in the first archwire hole 31, and the second archwire 20 is fixedly inserted in the second archwire hole 32. Before the archwire is worn in the mouth, the locking cover 30, the first archwire 10 and the second archwire 20 are pre-assembled into an integrated wearing component (see FIG. 1 ). Figure 4 ). See Figure 5The bracket 40 includes a bottom plate 41 and a body 42 protruding from the bottom plate 41. The bottom surface of the bottom plate 41 fits the patient's tooth surface shape so as to be bonded to the tooth surface. A pressing wing installation groove 43 is recessed inside the body 42. One end of the pressing wing 50 is rotatably connected to the pressing wing installation groove 43 through an elastic pin 60. The elastic pin 60 is simultaneously penetrated through the side of the pressing wing installation groove 43 and the pressing wing 50. The other end of the pressing wing 50 is a pressing portion 51. The pressing portion 51 protrudes out of the body 42 of the bracket 40. More specifically, the pressing portion 51 protrudes on the gum side of the body 42. In the wearing state, the locking cover 30 is buckled and connected to the bracket 40, and the elastic pin 60 is in a reset state. At this time, the elastic pin 60 drives the pressing wing 50 to act on the locking cover 30 and fasten the locking cover 30 to the bracket 40.

[0037] The use principle of the present invention is as follows:

[0038] Before wearing, the first archwire 10 and the second archwire 20 are pre-assembled on the plurality of lock covers 30, and the three are used as a wearing piece (see Figure 4 ), put it into the patient's oral cavity, press the locking cover 30 into the bracket 40 on each tooth position one by one, and the locking cover 30 is buckled and connected to the body 42 of the bracket 40; at this time, the pressing wing 50 presses against the locking cover 30, and due to the continuous restoring force of the elastic pin 60, the pressing wing 50 keeps the tendency of pressing the locking cover 30, preventing the locking cover 30 from falling out of the bracket 40. In the wearing state, the connection between the locking cover 30 and the bracket 40 has high stability. During the patient's daily eating process, food residues are stuck in the gap between the arch wire and the bracket 40. Since the locking cover 30 on each tooth position is firmly locked on the bracket 40, the wearing part (the connecting part between the locking cover 30 and the first arch wire 10 and the second arch wire 20) is not easy to loosen.

[0039] When the archwire needs to be replaced or removed, refer to Figure 5 , Figure 6, the pressing wing 50 protruding from the outside of the bracket 40 is pressed by hand, and the pressing wing 50 rotates. At the same time, the elastic pin 60 changes to a compressed state, and the pressing wing 50 pries the locking cover 30 upward from the bottom, so that the locking cover 30 is detached from the bracket 40, and the spring is reset; after each locking cover 30 is detached from the bracket 40, the arch wire can be taken out of the oral cavity. Even when the braces are worn for a long time, tartar accumulates around the bracket 40. Since the pressing wing 50 obviously protrudes from the outside of the bracket 40 and is suspended around it, tartar is not easily accumulated. Therefore, the press-to-unlock function of the present invention is not easily affected by the accumulation of tartar, and unlocking is easier. At the same time, since the pressing wing 50 rotates and pries the lock cover 30 from the bottom, in the entire mechanical system, the elastic pin 60 and the pressing wing 50 respectively act as a fulcrum and a lever. In the past, it was necessary to pinch the two sides of the lock cover 30 by hand and pull it out with force. The present invention can drive the lock cover 30 to be removed more labor-savingly. The doctor only needs to gently press the pressing wing 50 to complete the unlocking. The convenience is significantly improved, the patient's pain is reduced, and the patient's chair time during the follow-up visit is effectively shortened.

[0040] The correction principle of the present invention is as follows:

[0041] Specifically, participation Figure 2 The first arch wire 10 plays the role of the main arch wire, and its diameter is thicker than that of the second arch wire 20. The first arch wire 10 adopts the commonly used ordinary straight arch wire, which is in a smooth arch shape. Of course, a small amount of bending (such as mushroom fold) can be made according to needs at certain specific positions. The assembly between the first arch wire 10 and the lock cover 30 is a sliding connection or a fixed connection. The first arch wire 10 provides a function similar to the slide rail support. The second arch wire 20 plays the role of the auxiliary arch wire, which adopts a multi-curved wire structure, that is, there are multiple curved structures bent on the arch wire for releasing the correction force. The curved structure is a curved structure bent on the correction wire. Since the arch wire itself is an elastic part, the elastic deformation of the curved structure will continuously release the correction force, providing the main control force for the movement of the teeth. The curved structure can be any one of the following structural forms or any combination of any two or more: boot-shaped curve, vertical open large curve, open vertical curve, closed vertical curve, open vertical curve with loop, closed vertical curve with loop, horizontal curve, horizontal curve with loop, gate-shaped curve, omega curve, small loop curve, and other curved structural forms well known in the orthodontic field.

[0042] During the correction process, the second arch wire 20 is fixedly locked with the lock cover 30, and the correction force released by the second arch wire 20 acts on the lock cover 30 and the bracket 40 in turn, providing the main force for the movement of the teeth; the first arch wire 10 and the lock cover 30 can be relatively fixed or relatively sliding, especially in the process of tooth extraction gap retraction, for two tooth positions that need to retract the gap, the lock cover 30 on one tooth position is relatively fixed with the first arch wire 10, and the lock cover 30 on the other adjacent tooth position is relatively slidable with the first arch wire 10, so that in the process of gap retraction, the first arch wire 10 plays a role similar to a slide rail, and the relatively slidable lock cover 30 will synchronously pull the bracket 40 and the corresponding tooth position to move when moving. In this way, when the teeth move in the mesiodistal direction, the first arch wire 10 provides support and guidance, and the teeth will not tilt in the mesiodistal direction, avoiding the problems of deepening of anterior teeth overbite and lingual inclination of crown, and enhancing the control of torque, axial inclination and torsion of the teeth.

[0043] Preferably, see Fig. 9 The pressing wing 50 also has an ejection lock buckle 52. The ejection lock buckle 52 and the pressing portion 51 are respectively located at two opposite ends of the pressing wing 50. The ejection lock buckle 52 is accommodated in the pressing wing 50 accommodating cavity of the bracket 40. When the lock cover 30 is buckled and connected to the bracket 40, the ejection lock buckle 52 abuts against the bottom of the lock cover 30. When the pressing wing 50 is pressed and rotated, the ejection lock buckle 52 pries the bottom of the lock cover 30 to eject the lock cover 30 from the bracket 40. Further preferably, the mating surface of the ejection lock buckle 52 that abuts against the lock cover 30 is a smooth arc surface, so that when the ejection lock buckle 52 rotates, it always maintains smooth contact with the bottom of the lock cover 30, so that the lock cover 30 is smoothly ejected and will not be ejected at an excessively fast speed or with excessive force, so that the doctor can better operate in the mouth.

[0044] In addition to being fixed by the resetting force of the elastic pin 60, the present invention also designs a limiting structure to further improve the connection stability of the lock cover 30 in the bracket 40 to prevent the lock cover from falling out due to force in the normal wearing state. The above-mentioned limiting structure can have the following two embodiments:

[0045] Example 1: See Figure 8 The bottom of the lock cover 30 is provided with a first archwire mounting portion 34 and a second archwire mounting portion 35, and the first archwire hole 31 and the second archwire hole 32 are respectively provided on the first archwire mounting portion 34 and the second archwire mounting portion 35. The body 42 of the bracket 40 is provided with a body accommodating cavity 45, into which the first archwire mounting portion 34 of the lock cover 30 is inserted, so as to reduce the overall thickness of the orthodontic appliance and reduce the foreign body sensation in the oral cavity. Figure 5A limiting convex strip 44 is provided on the inner side wall of the body accommodating cavity 45, and a limiting groove 33 is provided on the outer side wall of the first archwire mounting portion 34 of the lock cover 30; when the lock cover 30 is buckled on the bracket 40, the limiting convex strip 44 and the limiting groove 33 are engaged with each other through the arc surface, thereby limiting the lock cover 30 from slipping out of the bracket 40. In this way, unless the pressing wing 50 is pressed with sufficient force to make the limiting groove 33 sufficiently pass over the limiting convex strip 44, the lock cover 30 is not easy to slip out of the bracket 40; even under the pressure caused by some food residues, the lock cover 30 can be stably connected in the bracket 40.

[0046] Example 2: See Fig.10 Similarly, the bottom of the lock cover 30 is convexly provided with a first archwire mounting portion 34 and a second archwire mounting portion 35, and the first archwire hole 31 and the second archwire hole 32 are respectively provided on the first archwire mounting portion 34 and the second archwire mounting portion 35. A body accommodating cavity 45 is provided in the body 42 of the bracket 40, and the first archwire mounting portion 34 of the lock cover 30 is inserted therein. Different from the first embodiment, the first archwire mounting portion 34 of the lock cover 30 has protruding first limiting wings 36 and second limiting wings 37 extending in opposite directions along the gingival and jaw directions on both sides; a first concave portion 410 is provided in the body accommodating cavity 45 of the bracket 40, and a second concave portion 55 is provided on the side of the pressing wing 50; when the lock cover 30 is buckled on the bracket 40, the first limiting wing 36 and the second limiting wing 37 are buckled in the first concave portion 410 and the second concave portion 55 respectively, so as to prevent the lock cover 30 from coming out of the bracket 20.

[0047] When the pressing wing 50 is pressed with sufficient force, the pressing wing 50 rotates, the second concave portion 55 opens, and the second limiting wing 37 is released from restriction; at the same time, the pressing wing 50 pushes the locking cover 30 from the bottom, so that the first limiting wing 36 passes over the first concave portion 410, and the locking cover 30 can be removed from the bracket 40. Even if the pressure caused by some food residue is not enough to contact the above-mentioned limiting lock, the locking cover 30 can always be stably connected in the bracket 40.

[0048] Preferably, the locking effect of the locking cover 30 in the bracket 40 can be further enhanced to improve the connection stability of the locking cover 30. Fig.10 A lower wing limiting convex strip 411 is convexly provided at the bottom of the pressing wing installation groove 43, and a lower wing limiting groove 56 is provided at the bottom of the pressing wing 50;

[0049] When the locking cover 30 is buckled on the bracket 40, the lower wing limiting convex strip 411 is engaged in the lower wing limiting groove 56 through the arc surface to limit the shaking of the pressing wing 50 in the rotation direction. In this way, when the pressing wing 50 is pressed with sufficient force and rotates, the lower wing limiting groove 56 passes over the lower wing limiting convex strip 411. In this process, the elastic pin 60 will also produce a certain elastic deformation and reset in the direction of the locking cover 30 to release the limit. In this way, the connection stability of the locking cover 30 in the bracket 40 is further enhanced. Even under the pressure caused by some food residues, the locking cover 30 can be stably connected in the bracket 40.

[0050] Preferably, see Figure 7 , a first archwire groove 46 is recessed on the top of the body 42 cavity; when the locking cover 30 is buckled on the bracket 40, the first archwire 10 is accommodated in the first archwire groove 46; preferably, a second archwire accommodating portion 47 is recessed on the body 42 of the bracket 40; when the locking cover 30 is buckled on the bracket 40, the second archwire mounting portion 35 of the locking cover 30 is placed in the second archwire accommodating portion 47 of the body 42. Through the above-mentioned storage-type structural design measures, the overall installation structure of the orthodontic appliance is kept compact, and the overall thickness is small. Figure 5 .

[0051] Since the volume of the pressing wing 50 is small, in order to facilitate the pressing operation and prevent slipping during the pressing and unlocking process, preferably, refer to Fig. 9 The pressing portion 51 of the pressing wing 50 is also provided with an anti-skid groove. Specifically, the anti-skid groove includes a strip-shaped anti-skid groove 53 and a dot-shaped anti-skid groove 54; the strip-shaped anti-skid groove 53 is a long strip structure for the fingernail to be inserted into, and it is not easy to slip when the doctor or the patient presses with the fingernail; in addition, the dot-shaped anti-skid groove 54 is suitable for the tip of the orthodontic tool to be inserted into, for example, it is not easy to slip when the tip of the orthodontic pliers is used for pressing. The dot-shaped anti-skid groove 54 is connected to the strip-shaped anti-skid groove 53.

[0052] The second archwire 20 and the lock cover 30 are fixedly locked and connected, and the following two connection forms can be adopted. An undercut structure for increasing static friction is provided in the second archwire hole 32 of the lock cover 30. When the second archwire 20 is inserted into the second archwire hole 32, it is affected by the large static friction and is difficult to slide out of the hole. Alternatively, the second archwire 20 is directly welded and fixed to the second archwire hole 32 of the lock cover 30. The first archwire hole 31 can be a square hole or a round hole, which is used to match square archwires and round archwires respectively. Of course, the square hole can match both square archwires and round archwires.

[0053] Preferably, the correction system also reserves a ligation groove structure to facilitate the hanging of the ligation wire or ligation ring. Figure 3An upper ligature groove 48 is concavely provided on the outer side of the body 42 close to the incisal end of the tooth, and a lower ligature groove 49 is concavely provided on the outer side of the body 42 close to the gingival end of the tooth.

[0054] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A double archwire correction system with high connection stability, characterized in that: include: First archwire and second archwire; The lock cover is provided with a first arch wire hole and a second arch wire hole; the first arch wire is fixedly inserted or slidably inserted into the first arch wire hole, and the second arch wire is fixedly inserted into the second arch wire hole; The bracket comprises a bottom plate and a body convexly arranged on the bottom plate; the body is concavely provided with a pressing wing mounting groove; A pressing wing is rotatably connected to the pressing wing installation groove through an elastic pin shaft, and the pressing wing has a pressing portion, and the pressing portion protrudes out of the body; The elastic pin is disposed through the body and the pressing wing; The locking cover is buckled on the bracket, and the pressing wing presses against the locking cover; when the elastic pin is in a reset state, it drives the pressing wing to act on the locking cover, so that the locking cover is buckled on the bracket.

2. The double archwire correction system with high connection stability according to claim 1, characterized in that: The pressing wing also has an ejection lock buckle, and the ejection lock buckle and the pressing part are respectively located on two opposite ends of the pressing wing; when the locking cover is buckled on the bracket, the ejection lock buckle presses against the bottom of the locking cover, so that when the pressing wing is pressed and rotated, the ejection lock buckle pushes the locking cover out of the bracket.

3. The double archwire correction system with high connection stability as described in claim 2, characterized in that: The mating surface of the ejection lock buckle that abuts against the lock cover is a smooth arc surface.

4. The double archwire correction system with high connection stability according to claim 1, characterized in that: A first arch wire mounting portion and a second arch wire mounting portion are convexly provided at the bottom of the lock cover, and the first arch wire hole and the second arch wire hole are respectively opened on the first arch wire mounting portion and the second arch wire mounting portion; A body accommodating cavity is provided in the body of the bracket, and the first archwire mounting portion of the locking cover is inserted into the body accommodating cavity; A limiting convex strip is provided on the inner side wall of the body accommodating cavity, and a limiting groove is provided on the outer side wall of the first arch wire mounting portion of the locking cover, and the limiting convex strip and the limiting groove are engaged with each other through an arc surface to limit the locking cover from coming out of the bracket.

5. The double archwire correction system with high connection stability according to claim 1, characterized in that: A first arch wire mounting portion and a second arch wire mounting portion are convexly provided at the bottom of the lock cover, and the first arch wire hole and the second arch wire hole are respectively opened on the first arch wire mounting portion and the second arch wire mounting portion; A body accommodating cavity is provided in the body of the bracket, and the first archwire mounting portion of the locking cover is inserted into the body accommodating cavity; The first archwire mounting portion of the locking cover has protruding first limiting wings and second limiting wings extending in opposite directions along the gingival and jaw directions; a first concave portion is provided in the body accommodating cavity of the bracket, and a second concave portion is provided on the side of the pressing wing; when the locking cover is buckled on the bracket, the first limiting wing and the second limiting wing are respectively buckled in the first concave portion and the second concave portion to limit the locking cover from falling out of the bracket.

6. The double archwire correction system with high connection stability according to claim 1, characterized in that: A lower wing limiting convex strip is convexly arranged at the bottom of the pressing wing installation groove, and a lower wing limiting groove is arranged at the bottom of the pressing wing; When the locking cover is buckled on the bracket, the lower wing limiting convex strip is engaged in the lower wing limiting groove through the arc surface to limit the shaking of the pressing wing in its rotation direction; When the pressing wing is pressed and rotated, the lower wing limiting groove passes over the lower wing limiting convex strip to release the limiting.

7. The double archwire correction system with high connection stability according to claim 1, characterized in that: A first archwire groove is recessed at the top of the body accommodating cavity; when the locking cover is buckled on the bracket, the first archwire is accommodated in the first archwire groove.

8. The double archwire correction system with high connection stability according to claim 7, characterized in that: A second arch wire accommodating portion is recessed on the body of the bracket; when the locking cover is buckled on the bracket, the second arch wire mounting portion is spanned in the second arch wire accommodating portion.

9. The double archwire correction system with high connection stability according to claim 1, characterized in that: The pressing part of the pressing wing is provided with an anti-slip groove on its surface, and the anti-slip groove includes: a strip-shaped anti-slip groove and a point-shaped anti-slip groove; the strip-shaped anti-slip groove is a long strip-shaped structure, and its two ends pass through the two sides of the pressing part; the point-shaped anti-slip groove is suitable for the tip of the orthodontic tool to be inserted; the point-shaped anti-slip groove is connected to the strip-shaped anti-slip groove.

10. The double archwire correction system with high connection stability according to claim 1, characterized in that: The second archwire hole of the lock cover is provided with an undercut structure for increasing static friction, so that the second archwire is fixedly clamped in the second archwire hole; or, the second archwire is welded and fixed in the second archwire hole; the first archwire hole is a square hole or a round hole; The first arch wire is a straight arch wire, and the second arch wire is a multi-curved wire, and the multi-curved wire is bent with a plurality of curved structures for releasing correction force.

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