Milk molar bracket suitable for tooth replacement period

Abstract

The utility model relates to a deciduous molar bracket suitable for a tooth replacement period, which belongs to the technical field of medical instruments and comprises a bottom plate, an inverted T-shaped groove is arranged on one side of the bottom plate close to a gingival side, and the upper half part of the inverted T-shaped groove is a rail groove extending from the bracket to a deciduous molar crown gingival side; the bracket body comprises a first connecting part, a first connecting column and a supporting plate which are sequentially connected, the first connecting part is located in the inverted-T-shaped groove and can slide and rotate in the inverted-T-shaped groove, the bracket body is further provided with a threaded hole sequentially penetrating through the first connecting part, the first connecting column and the supporting plate, a bolt is arranged in the threaded hole, and the bracket body and the bottom plate can be locked by rotating the bolt. According to the deciduous molar tooth bracket suitable for the tooth replacement period, the first connecting part of the bracket body of the bracket is positioned in the inverted T-shaped groove of the bottom plate and can slide and rotate in the groove towards the deciduous molar crown gingival direction, so that the bracket body can flexibly adjust the gingival direction position height and the inclination angle according to the actual requirements of orthodontics.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a bracket for deciduous molars suitable for the dentition replacement period. Background Art

[0002] The incidence of crooked teeth among adolescents is as high as 75%. The current state of orthodontic practice is characterized by a significant number of children in the edentulous period requiring orthodontic treatment, yet existing bracket designs for primary molars are unable to meet this enormous market demand. The main methods currently used for correcting crooked teeth include square and straight wire arch techniques. Brackets are bonded to each tooth, and buccal tubes are affixed to the molars. Flexible or rigid nickel-titanium alloy or stainless steel archwires are then tied and secured between the brackets and bands. The archwire releases its elastic force, thereby shifting the teeth and ultimately realigning the misaligned teeth to their normal position.

[0003] In the actual application of orthodontic correction in the early stage of tooth replacement, the brackets are bonded to the permanent incisor teeth, and the arch wire is tied and fixed to the permanent incisor brackets, deciduous molar brackets, and the buccal tube of the first molar with a ligature. The end is fixed on the buccal tube of the first molar or the deciduous molar bracket, so that the permanent incisor teeth, deciduous molars and first molars are combined with the arch wire to enhance the support effect and ensure the effect of oral orthodontic correction.

[0004] During the dentition replacement period, the crown of the deciduous molar is too short. When it is connected to the permanent anterior teeth by the same archwire, if the deciduous molar archwire is inserted into the slot, it is easy to stretch the permanent anterior teeth, causing unfavorable elongation of the permanent anterior teeth. The bracket track of the deciduous molar is designed to extend toward the gingival side, so that the position of the deciduous molar bracket is close to the crown center height of the erupted first premolar, reducing the impact of insufficient crown eruption height. Otherwise, the doctor will need to bend the archwire for each follow-up visit in the clinic, and the accuracy of each bend and the resilience of the nickel-titanium wire cannot be guaranteed, which increases the clinic operation time and the complexity of the doctor's operation. The original deciduous molar crown is too low. If the archwire is suspended on the gingival side of the bracket each time, the archwire is not inserted into the bracket, and the archwire is easily slipped by relying on the ligature wire for ligation, causing discomfort to the patient's mouth and increasing doctor-patient conflicts before the follow-up visit. The resin ball wrapping the end of the archwire affects the sliding of the archwire and also increases the clinician's operation time.

[0005] Furthermore, the bracket body and base plate of existing traditional brackets are often fixedly connected, making it impossible to flexibly adjust the bracket body's position based on the clinical crown center position and angle of the primary molars. The height of the archwire passing through the main archwire slot is affected by the bonding position of the base plate on the tooth. This is particularly true during the mixed deciduous and permanent dentition period, when the clinical crowns of deciduous molars are short. After bonding, the slot height of existing brackets is inconsistent with the height of the anterior bracket archwire, exerting an adverse elongational force on the permanent anterior teeth. Utility Model Content

[0006] The purpose of the present invention is to overcome at least one of the above-mentioned defects of the prior art and to provide a bracket for deciduous molars suitable for the dentition replacement period.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A bracket for deciduous molars suitable for the replacement period, comprising:

[0009] The bottom plate has an inverted T-shaped groove on its gingival side;

[0010] The bracket body includes a first connecting part, a first connecting column and a support plate connected in sequence, the first connecting part is located in the inverted T-shaped groove and can slide and rotate in the inverted T-shaped groove, and the bracket body is also provided with a threaded hole that passes through the first connecting part, the first connecting column and the support plate in sequence, and a bolt is provided in the threaded hole, and the bracket body and the base plate are locked by rotating the bolt.

[0011] Furthermore, the first connecting portion is disc-shaped, so that the first connecting portion can rotate and slide in the inverted T-shaped groove.

[0012] Furthermore, the inverted T-shaped groove consists of a wide groove and a narrow groove arranged on the bottom plate from the inside outward, and the diameter of the first connecting portion is less than or equal to the groove width of the wide groove and greater than the groove width of the narrow groove.

[0013] Furthermore, the height of the first connecting portion is less than or equal to the groove height of the wide groove.

[0014] Furthermore, the side of the base plate away from the support plate is divided into a crown portion fitting the deciduous molars and a gingival portion extending toward the crowns. The crown portion fitting the deciduous molars is provided with a bonding bottom mesh, and the gingival portion extending toward the crowns has a smooth surface.

[0015] Furthermore, the bottom surface area and curvature of the crown portion of the deciduous molar are matched with the labial surface of the deciduous molar.

[0016] Furthermore, chamfers are provided around the bottom plate.

[0017] Furthermore, the bolt is a countersunk bolt.

[0018] Furthermore, a main archwire slot is provided on a side of the bracket body facing away from the base plate.

[0019] Furthermore, ligation wings are provided on both sides of the main archwire slot.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The utility model provides a bracket for deciduous molars suitable for the replacement period of teeth. The first connecting portion of the bracket body of the bracket is located in an inverted T-shaped groove of the base plate and can slide and rotate in the groove, so that the bracket body can flexibly adjust the gingival position height and inclination angle according to the actual needs of tooth correction.

[0022] (2) The utility model provides a bracket for deciduous molars suitable for the period of replacement dentition. The bracket base plate is provided with an extended slidable inverted T-shaped groove near the gum. Bolts are provided between the extended gingival sliding inverted T-shaped groove and the bracket body, which combines the gingival extended track base plate with the non-self-locking ordinary bracket body. The bracket body can slide along the inverted T-shaped groove in the gingival direction. The bracket body is fixed in position by tightening the bolts to avoid loosening. The insufficient eruption height of the deciduous molars can be effectively supplemented to the eruption height of the permanent premolars, thereby preventing adverse correction forces on the permanent front teeth during early orthodontic treatment of children in the period of replacement dentition. While ensuring the correction effect, the convenience of operation for clinicians is improved, thereby ensuring the oral orthodontic effect.

[0023] (3) The utility model provides a bracket for deciduous molars suitable for the replacement period. The utility model has a simple structure, is improved on the basis of the existing fixed orthodontic appliance, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of a bracket for deciduous molars suitable for use in the replacement period in an embodiment;

[0025] Figure 2 is a schematic diagram of a bottom plate in an embodiment;

[0026] Figure 3 is a schematic diagram of a bracket body in an embodiment;

[0027] Figure 4 A schematic diagram of a bolt in the embodiment;

[0028] The numbers in the figure are as follows: 1-base plate; 2-bracket body; 3-bolt; 101-inverted T-slot; 102-extending toward the gingival part of the crown; 103-fitting the crown of the deciduous molar; 104-bonding base mesh; 201-first connecting part; 202-first connecting column; 203-support plate; 204-main archwire slot; 205-ligation wing. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0030] Example

[0031] This embodiment provides a bracket for primary molars suitable for the replacement period. Figure 1-3 , including a base plate 1 and a bracket body 2;

[0032] The base plate 1 is provided with an inverted T-shaped groove 101 on the gingival side; the bracket body 2 includes a first connecting portion 201, a first connecting column 202 and a supporting plate 203 connected in sequence, the first connecting portion 201 is located in the inverted T-shaped groove 101 and can slide and rotate in the inverted T-shaped groove 101, and the bracket body 2 is also provided with a threaded hole that passes through the first connecting portion 201, the first connecting column 202 and the supporting plate 203 in sequence, and a bolt 3 is provided in the threaded hole, and the bracket body 2 and the base plate 1 can be locked by rotating the bolt. In other words, after the position and angle adjustment of the bracket body 2 are completed, the bracket body 2 and the base plate 1 can be quickly locked by rotating the bolt 3, so as to avoid affecting the correction effect due to the loosening of the bracket body 2 during the correction process, and ensure that the applied correction force can stably act on the teeth.

[0033] Please see again Figure 3 In this embodiment, the first connecting portion 201 is disc-shaped, so that the first connecting portion 201 can rotate and slide in the inverted T-shaped groove 101.

[0034] Please see again Figure 3 In this embodiment, the inverted T-shaped groove 101 is composed of a wide groove and a narrow groove arranged from the inside to the outside on the bottom plate 1. The diameter of the first connecting part 201 is less than or equal to the groove width of the wide groove and greater than the groove width of the narrow groove; the height of the first connecting part 201 is equal to the groove height of the wide groove. This ensures the flexibility of the first connecting part to rotate and slide in the wide groove, and prevents it from detaching from the narrow groove, thereby ensuring the stability and safety of the adjustment process.

[0035] Please see again Figure 2 In this embodiment, the side of the base plate 1 away from the support plate is divided into a crown portion 103 for fitting the deciduous molar and a gingival portion 102 extending toward the crown. The crown portion 103 for fitting the deciduous molar is provided with a bonding bottom mesh 104, and the gingival portion 102 extending toward the crown has a smooth surface, is close to the gums, and is easy to clean.

[0036] In this embodiment, the bottom surface area and curvature of the crown portion 103 fitting the deciduous molar match the labial surface of the deciduous molar, which can ensure that the base plate can fit closely to the deciduous molar and provide a stable foundation for subsequent correction operations.

[0037] Please see again Figure 2 In this embodiment, chamfers are provided around the bottom plate 1 .

[0038] Please see again Figure 1In this embodiment, the bolt 3 is a countersunk bolt, which can prevent the bolt head from protruding from the surface of the bracket body, reduce interference with other tissues in the oral cavity, and make the overall structure of the bracket smoother, which is convenient for subsequent installation and ligation of the arch wire.

[0039] Please see again Figure 3 In this embodiment, a main arch wire slot 204 is provided on the side of the bracket body 2 facing away from the base plate 1, and ligature wings 205 are provided on both sides of the main arch wire slot 204. The main arch wire slot 204 can accommodate the main arch wire, and the ligature wings 205 are convenient for fixing the main arch wire in the slot with a ligature wire or a ligature ring, so that the arch wire can stably transmit the correction force.

[0040] Working principle:

[0041] The base plate 1 of the bracket provided in this embodiment is tightly bonded and fixed to the labial surface of the deciduous molar through the bonding base mesh 104 that fits the crown 103 of the deciduous molar. The smooth surface of the base plate 1 extending toward the gingival part 102 of the crown is close to the gum for easy cleaning. The chamfers on all sides of the base plate 1 reduce oral irritation and provide a stable foundation for the whole. The disc-shaped first connecting part 201 of the bracket body 2 is embedded in the inverted T-shaped groove 101 of the base plate 1, and the position and rotation angle of the bracket body 2 can be flexibly adjusted by sliding. After the adjustment is completed, the bracket body 2 and the base plate 1 are locked by tightening the bolt 3 to prevent loosening to ensure the stable effect of the correction force. The main archwire groove 204 of the bracket body 2 accommodates the main archwire, and the ligating wings 205 on both sides fix the archwire, so that the correction force is effectively transmitted to the teeth through the bracket. The whole is adapted to the characteristics of deciduous molars in the replacement period through the coordination of stable fixation, flexible adjustment locking and effective force transmission, taking into account the correction effect and oral safety and convenience.

[0042] Specifically, in this embodiment, the crown portion 103 of the deciduous molar is fixed to the crown surface of the existing deciduous molar by an enamel adhesive, and the bottom surface of the gingival portion 102 extending toward the crown is smooth, which is conducive to periodontal cleaning. In the case that the deciduous molar has not erupted at an adequate height, the bracket body 2 can be slid toward the gingiva along the inverted T-slot 101 of the base plate 1 to a height and angle that meets the requirements of the permanent anterior teeth by rotating the bolt 3, so as to facilitate the placement of the arch wire. Tightening the bolt 3 can lock the position of the bracket body 2 on the base plate 1 without loosening, thereby ensuring the stability of the adjustment. The bracket body 2 can also be rotated around the base plate 1 to an angle suitable for clinical needs. The height of the nut of the bolt 3 in the bracket body 2 is lower than the main arch wire slot 204, and does not affect the placement and movement of the arch wire in the bracket body 2. The inverted T-slot 101 is provided with a sliding end point to prevent the bracket body 2 from sliding out of the base plate as a whole due to excessive gingival movement.

[0043] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. Any person skilled in the art may utilize the above disclosure to modify or remodel the present invention into equivalent embodiments. However, any simple modification, equivalent variation, or modification of the above embodiment that does not depart from the technical content of the present invention and is based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A bracket for deciduous molars suitable for the replacement period, characterized in that: include: A bottom plate (1) having an inverted T-shaped groove (101) provided on its gingival side; A bracket body (2), comprising a first connecting portion (201), a first connecting column (202), and a supporting plate (203) connected in sequence, wherein the first connecting portion (201) is located in the inverted T-shaped groove (101) and can slide and rotate in the inverted T-shaped groove (101), and the bracket body (2) is further provided with a threaded hole passing through the first connecting portion (201), the first connecting column (202), and the supporting plate (203) in sequence, wherein a bolt (3) is provided in the threaded hole, and the bracket body (2) and the base plate (1) are locked by rotating the bolt; The first connecting portion (201) is disc-shaped, so that the first connecting portion (201) can rotate and slide in the inverted T-shaped groove (101); The side of the bottom plate (1) facing away from the support plate is divided into a crown portion (103) for fitting the deciduous molars and a gingival portion (102) extending toward the crowns of the teeth. The crown portion (103) for fitting the deciduous molars is provided with a bonding bottom mesh (104), and the gingival portion (102) extending toward the crowns of the teeth has a smooth surface.

2. The bracket for deciduous molars suitable for the replacement period of dentition according to claim 1, characterized in that: The inverted T-shaped groove (101) consists of a wide groove and a narrow groove arranged on the bottom plate (1) from the inside outward, and the diameter of the first connecting portion (201) is less than or equal to the groove width of the wide groove and greater than the groove width of the narrow groove.

3. The bracket for deciduous molars suitable for the replacement period of dentition according to claim 2, characterized in that: The height of the first connecting portion (201) is equal to or less than the groove height of the wide groove.

4. The bracket for deciduous molars suitable for the replacement period of dentition according to claim 1, characterized in that: The bottom surface area and curvature of the crown portion (103) fitting the deciduous molar match the labial surface of the deciduous molar.

5. The bracket for deciduous molars suitable for the replacement period of dentition according to claim 1, characterized in that: The bottom plate (1) is also provided with chamfers around its periphery.

6. The bracket for deciduous molars suitable for the replacement period of dentition according to claim 1, characterized in that: The bolt (3) is a countersunk bolt.

7. The bracket for deciduous molars suitable for the replacement period of dentition according to claim 1, characterized in that: A main archwire slot (204) is provided on the side of the bracket body (2) facing away from the base plate (1).

8. The bracket for deciduous molars suitable for the replacement period of dentition according to claim 7, characterized in that: Ligating wings (205) are provided on both sides of the main archwire slot (204).

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