A self-locking bracket
By optimizing the shape and structure of the sliding locking plate cover of the self-ligating bracket, increasing the groove space, and combining the central vertical hole and arc-shaped groove, the problems of high friction and insufficient archwire deformation of the self-ligating bracket are solved, achieving efficient and precise orthodontic treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANTAI YUHUANGDING HOSPITAL
- Filing Date
- 2025-06-24
- Publication Date
- 2026-06-30
AI Technical Summary
Existing self-ligating brackets have problems such as high friction, low tooth movement efficiency, large gap between the slot and the archwire, and insufficient archwire deformation, resulting in an inefficient and inaccurate orthodontic process.
The design incorporates a sliding locking plate cover with a smaller contact area with the archwire. The bracket body features an arc-shaped structure and a central vertical hole to increase groove space, and an arc-shaped groove is formed at the edge of the bracket wing post. This, combined with the use of an insertable traction hook and a rubber chain, enables full deformation of the archwire and efficient control of the teeth.
It reduces friction, improves the efficiency and precision of tooth movement, shortens treatment time, and achieves efficient alignment and leveling of teeth.
Smart Images
Figure CN224421185U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically, it is a self-ligating bracket for orthodontic treatment. Background Technology
[0002] Brackets are an important component of fixed orthodontic technology. They are orthodontic appliances used to correct malocclusion. The archwire applies various types of corrective forces to the teeth through the brackets. The main function of the brackets is to fix the archwire, so that the archwire can better perform its function, transmit corrective forces, and control the three-dimensional movement of the teeth to achieve the purpose of orthodontic treatment.
[0003] Traditional brackets are fixed by ligating the archwire to the main groove of the bracket. However, this method results in high friction between the bracket and the archwire, affecting tooth movement during orthodontic treatment. Currently available self-ligating brackets differ from traditional ligated brackets. They feature sliding locking clips on the bracket body, which lock the archwire to the bracket. Compared to traditional ligated brackets, self-ligating brackets eliminate the need for orthodontic treatment to use ligature wires to ligate the archwire, significantly reducing treatment time and improving efficiency.
[0004] However, existing self-locking brackets still generally have the following two problems:
[0005] On the one hand, because the contact area between the archwire and the sliding locking plate in the archwire slot is large, the friction is increased. When the tooth moves to close the extraction gap, the efficiency of tooth movement will be reduced. At the same time, a larger orthodontic force is required. In severe cases, damage to the teeth and periodontal tissues may occur, making it difficult to align and level the teeth.
[0006] On the other hand, the box-like space formed by self-ligating brackets after locking is relatively large, and the clearance between the slot and the archwire is relatively large. This makes the archwire deform insufficient after being inserted into the slot, and the alignment and leveling performance cannot be fully expressed. Especially when using thinner nickel-titanium wire or stainless steel wire initially, the archwire cannot deform sufficiently, and the orthodontic force of the archwire cannot be fully expressed, resulting in the teeth not being fully aligned and leveled.
[0007] It is evident that although self-ligating brackets have brought about different changes to orthodontic techniques, they still cannot effectively resolve the contradiction between reducing friction to achieve tooth movement under light force and simultaneously achieving precise tooth control. Utility Model Content
[0008] The present invention aims to solve the various problems mentioned above, and thereby provide a self-locking bracket.
[0009] To solve the above problems, the technical solution adopted by this utility model is as follows:
[0010] A self-locking bracket includes a base plate and a bracket body above it. The bracket body has a bowwire groove in its middle. A sliding locking plate is installed above the bracket body on one side of the bowwire groove. The sliding locking plate has a locking plate cover that closes over the bowwire groove when locked. The self-locking bracket is characterized in that...
[0011] When the sliding locking plate is in the locked state, the shape of the locking plate cover should satisfy the following: when the locking plate cover is in contact with the bow wire, the locking plate cover has a relatively smaller contact area with the bow wire or the bow wire has a relatively shorter contact distance with the locking plate cover.
[0012] Furthermore, the shape of the locking plate cover can be any one of trapezoidal, oblique rectangle, I-shape, rhombus, or double concave arc surface shape.
[0013] Furthermore, the crown-like and labial-buccal sides of the locking plate are changed from the traditional planar structure to an arc-shaped structure, and both arc-shaped structures on both sides convex towards the labial-buccal side. This structure can increase the comfort of the mucosa on the one hand, and effectively increase the space in the archwire groove on the other hand, increasing the clearance between the archwire and the groove. This not only reduces the friction between the locking plate and the archwire, but also makes it more suitable for orthodontic operations using two archwires in the same archwire groove.
[0014] Furthermore, a vertical hole in the direction of the jaw and gum is opened in the middle of the wing post of the bracket body.
[0015] Furthermore, during the correction of rotated teeth, the ligature wire is ligated through the vertical hole closer to the crown to the mesial or distal wing of the tooth that is lingually rotated.
[0016] Furthermore, during the correction of the rotating teeth, a positive shaft spring is inserted into the vertical hole.
[0017] Furthermore, the vertical hole insertable traction hook, used in conjunction with a rubber chain or tension spring, can simultaneously move tilted teeth and achieve tooth orthogonality. For example, if a tooth with a distally tilted crown needs to be moved distally, the traction portion of the insertable traction hook is placed on the gingival side of the bracket, and the rubber chain and traction hook apply force to move the tooth distally, simultaneously achieving tooth orthogonality. Conversely, if a tooth with a mesially tilted crown needs to be moved distally, the rubber chain and the insertable traction hook are connected to the occlusal traction portion of the bracket.
[0018] Furthermore, the four edges of the wing post of the bracket body are formed with arc-shaped grooves, which are used to guide the ligature wire to slide towards the bottom of the bracket, thereby allowing the archwire to obtain maximum deformation and more complete expression.
[0019] This utility model discloses a self-ligating bracket. On the one hand, by reducing the area of the locking plate and changing the near-crown side of the locking plate from a flat surface to an arc surface, friction can be reduced to achieve efficient tooth movement under light force orthodontic treatment. Furthermore, due to its large groove space, it can simultaneously close extraction gaps and align teeth under double archwires, which can greatly shorten the treatment time. On the other hand, by opening a vertical hole in the middle of the wing post of the bracket body and setting the four edges of the wing post of the bracket body as arc-shaped grooves, the self-ligating bracket can simultaneously achieve full deformation of the archwire under ligation, achieving efficient control of teeth and achieving full alignment and alignment of teeth. Attached Figure Description
[0020] Figure 1 : Schematic diagram of the self-locking bracket structure in Example 1 (the locking plate cover is a slanted rectangle);
[0021] Figure 2 : Schematic diagram of the self-locking bracket structure in Embodiment 1 (the locking plate cover is trapezoidal);
[0022] Figure 3 : Schematic diagram of the self-locking bracket structure in Example 1 (the locking plate cover is a double concave arc shape with near, far and middle sections).
[0023] Figure 4 : Schematic diagram of the self-locking bracket structure in Example 1 (correcting the rotating teeth by ligating the central vertical hole of the wing column);
[0024] Figure 5 : Schematic diagram of the self-locking bracket structure in Example 1 (the positive axis spring corrects the rotating teeth through the central vertical hole);
[0025] Figure 6 : Schematic diagram of the self-locking bracket structure in Example 1 (the insertable traction hook is inserted into the central vertical hole and used in conjunction with the rubber chain to move the tilted tooth while achieving the tooth's positive axis).
[0026] In the diagram, 1. Base plate, 2. Archwire groove, 3. Sliding locking plate, 3a. Locking plate cover, 3a1. Arc-shaped structure near the crown, 4. Central vertical hole, 5. Arc-shaped groove, 6. Archwire, 7. Ligating wire, 8. Positive axis spring, 9. Insertable traction hook, 10. Rubber chain. Detailed Implementation
[0027] The present invention will now be described in detail with reference to the accompanying drawings.
[0028] Example 1
[0029] A self-locking bracket, such as Figure 1As shown, the device includes a bracket body, a base plate 1 disposed at the bottom of the bracket body, and a wire groove 2 formed on the bracket body. A sliding locking plate 3 is also disposed above the bracket body. The sliding locking plate 3 opens and closes the wire groove 2 by sliding and changing its position. Therefore, the sliding locking plate 3 has a locking position. At the locking position, the sliding locking plate 3 forms a locking plate cover 3a covering the wire groove 2 above the wire groove 2, and the locking plate cover 3a contacts and rubs against the wire in the wire groove 2.
[0030] When the sliding latch 3 is locked, the archwire 6 and the latch cover plate 3a above the archwire groove 2 generate a certain amount of friction due to contact. This friction increases with the increase of the contact area between the two, which will create some resistance to tooth movement during the orthodontic process. To address this, this embodiment adopts two technical measures: firstly, by changing the shape of the latch cover plate 3a above the archwire groove 2 to reduce the contact area between the latch cover plate 3a and the archwire 6; secondly, by changing the planar structure on both sides (the side near the crown and the side near the labial and buccal surfaces) of the latch cover plate 3a above the archwire groove 2 to an arc surface convex towards the labial and buccal surfaces. The arc surface structure on the near-labial and buccal surfaces can increase the comfort of the labial and buccal mucosa, while the arc surface structure 3a1 on the near-crown surfaces allows for a larger clearance in the groove of the archwire groove, thus enabling the use of two archwires in the same groove. This allows for simultaneous alignment and closure of extraction gaps, greatly shortening the orthodontic time.
[0031] In this embodiment, the shape change of the locking plate 3a above the archwire slot 2 is to change the original rectangle to a slanted rectangle with half the area. Compared with the original rectangle, the slanted rectangle has half the area in contact with the archwire, thereby effectively reducing friction and achieving efficient tooth movement under less traction, making the orthodontic process safer and more efficient.
[0032] It should be understood that the shape of the locking plate 3a above the bow wire groove 2 may also vary, such as being I-shaped, trapezoidal, rhomboid, or a double-concave arc shape with near and far concave sides. Such deformations of the locking plate 3a can effectively reduce the contact area and friction between the bow wire and the locking plate 3a.
[0033] Due to the different ligation methods after the archwire is inserted into the slot, compared with square wire and straight wire brackets, the traditional sliding locking bracket 3, in the locked state, creates a larger box-like space within the archwire slot 2, resulting in a larger gap between the slot and the archwire. This leads to insufficient deformation of the archwire 6 after insertion into the slot, and the alignment and leveling performance cannot be fully expressed. Especially when initially using thinner nickel-titanium wire or stainless steel wire, the archwire cannot deform sufficiently, and the orthodontic force cannot be fully expressed, resulting in inadequate tooth alignment and leveling. Therefore, the technical measure adopted in this embodiment is to create a central vertical hole 4 on the bracket body, and ligate the central vertical hole 4 to the mesial or distal wing of the tooth with ligature wire 7. Because the central vertical hole 4 is closer to the crown, the ligation is tighter, and the archwire deforms sufficiently, thereby allowing the orthodontic force to be fully expressed. This better controls the rotational precision of the teeth, achieving better alignment and leveling in the three-dimensional direction, thus overcoming the problem that self-ligating brackets cannot efficiently control tooth orientation.
[0034] The ligature wire can be directly passed through the central vertical hole 4 to suspend severely misaligned teeth, such as those that are lingual, high, or low, making the operation simpler and more convenient. The central vertical hole 4 is into which the insertable traction hook 9 is inserted and used in conjunction with the rubber chain 10. This allows the tooth to be aligned while moving the tilted tooth. The central vertical hole 4 is also into which the alignment spring 8 is inserted, which is beneficial for correcting rotated teeth.
[0035] In order to fully express the performance of the archwire in the above ligation scheme, this embodiment forms arc-shaped grooves 5 on the four edges of the bracket wing post. During ligation, the ligation wire will slide along the arc-shaped grooves 5 towards the bottom of the bracket, thereby maximizing the deformation of the archwire 6.
Claims
1. A self-locking bracket, comprising a base plate and a bracket body above it, wherein the bracket body has a wire groove in the middle, and a sliding locking plate is installed above the bracket body on one side of the wire groove, the sliding locking plate having a locking plate cover plate that covers the wire groove in a locked state, characterized in that, When the sliding locking plate is in the locked state, the shape of the locking plate cover should satisfy the following: when the locking plate cover is in contact with the bow wire, the locking plate cover has a relatively smaller contact area with the bow wire or the bow wire has a relatively shorter contact distance with the locking plate cover.
2. A self-locking bracket as described in claim 1, characterized in that, The shape of the locking plate cover is any one of the following: trapezoidal, oblique rectangle, I-shaped, rhomboid, or double concave arc shape (near, far, and middle).
3. A self-locking bracket as described in claim 1, characterized in that, The locking plate has a curved surface structure on the crown side and the labial / buccal side, which is a departure from the traditional planar structure. Both curved surfaces on both sides convex toward the labial / buccal side.
4. A self-locking bracket as described in claim 1, characterized in that, The bracket body has a vertical hole in the middle of the wing column facing the gum line.
5. A self-locking bracket as described in claim 4, characterized in that, During the correction of rotated teeth, the ligature wire is ligated through the vertical hole closer to the crown to the mesial or distal wing of the tooth that is lingually rotated.
6. A self-locking bracket as described in claim 5, characterized in that, During the correction of the rotating teeth, a positive shaft spring is inserted into the vertical hole.
7. A self-locking bracket as described in claim 6, characterized in that, The vertical hole, when used in conjunction with an insertable traction hook and a rubber chain or tension spring, can achieve the orthogonal alignment of the tooth while moving the tilted tooth.
8. A self-locking bracket as described in claim 1, characterized in that, The four edges of the wing post of the bracket body are formed with arc-shaped grooves, which are used to guide the ligature wire to slide towards the bottom of the bracket, thereby maximizing the deformation of the archwire.