Cantilever type appliance for locking back teeth

Abstract

The utility model discloses a cantilever type appliance for locking back teeth. The cantilever type appliance comprises a retainer, a connector and a cantilever body, the retainer is in a ring shape, sleeves and is adhered to the periphery of the tooth and partially surrounds the tooth crest; the connecting body comprises a tooth side connecting body and a palatal side connecting body, and the tooth side connecting body is connected between the retainers on the same side; the palatal side connector is connected between the retainers on the opposite sides, and the palatal side connector is in an arc shape and is close to the palatal part; the cantilever body is formed by extending the retainer towards the deep part of the dentition; two side edges of the palate side connector are bent inwards to form a back groove, and a support body is arranged in the back groove; one part of the supporting body is embedded in the back groove to form fixation, and the other part of the supporting body protrudes out of the outer edge of the back groove; according to the utility model, extrusion and friction between the palatal side connector and the palatal mucosa of the oral cavity of a patient can be avoided, and foreign body sensation in the oral cavity of the patient is weakened; and the situation that bacteria are bred in the oral cavity and the oral hygiene is affected due to the fact that saliva, food residues and the like are accumulated in the palate side connecting body can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of posterior crossbite correction devices, and particularly relates to a cantilever orthodontic appliance for posterior crossbite. Background Art

[0002] According to the buccolingual position relationship of the upper and lower posterior teeth, crossbite can be clinically divided into positive crossbite and reverse crossbite. Positive crossbite means that the lingual inclined plane of the lingual cusp of the upper posterior teeth is located on the buccal side of the buccal inclined plane of the buccal cusp of the lower posterior teeth, and there is no occlusal contact on the occlusal surface; reverse crossbite means that the buccal inclined plane of the buccal cusp of the upper posterior teeth is located on the lingual side of the lingual inclined plane of the lingual cusp of the lower posterior teeth, and there is no occlusal contact on the occlusal surface. Positive and reverse crossbites can occur unilaterally or bilaterally, most commonly in the maxillary and mandibular second molars, and crossbites in the premolar area also often occur.

[0003] In the prior art, a maxillary modified palatal bar is mostly used to correct the crossbite of the second molar. The prepared modified palatal bar is fixed and embedded with plaster, the welding part is exposed, silver soldered, polished, and the traction hook of the cantilever orthodontic appliance is adhesively bonded to the buccal tube on the buccal side of the maxilla and traction is applied through a rubber chain to relieve the crossbite. This method relies on the intra-arch anchorage to generate gingival and palatal forces on the crossbite teeth to correct the inclined molars.

[0004] However, in the posterior crossbite correction scheme, the orthodontic appliance is prone to friction with the oral palatal mucosa during daily wearing, causing discomfort to the patient. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a cantilever orthodontic appliance for posterior crossbite, so as to solve the technical problems in the prior art that the orthodontic appliance frictions the palatal mucosa, causes a strong foreign body sensation in the oral cavity, and is prone to bacterial growth inside the rod body in contact with the palatal mucosa.

[0006] To solve the above technical problems, the utility model specifically provides the following technical solutions:

[0007] The utility model provides a cantilever appliance for posterior crossbite, comprising: a retainer which is in a ring shape and is adhesively sleeved on the circumference of a tooth and partially surrounds the tooth apex; a connector which includes a tooth-side connector and a palate-side connector. The tooth-side connector is connected between the retainers on the same side, and the tooth-side connector is close to the inner side of the dental arch and surrounds a partial axial surface of the tooth. The palate-side connector is connected between the retainers on the opposite sides, and the palate-side connector is in an arc shape and is close to the palate mucosa; a cantilever which is formed by extending from the retainer / connector deep into the dental arch, and the cantilever is arranged on the buccal side / palate side; the cantilever is tensionally connected to a lingual button / buccal tube fixed on the dental arch through an elastic chain fixed thereon, so that the tension force of the elastic chain acts on the affected tooth through the retainer and the connector for correction; wherein, both sides of the palate-side connector are bent inward to form a back groove, the back groove faces the oral palate mucosa, and a support body is arranged in the back groove and extends along its path; a part of the support body is embedded in the back groove to form a fixation, and another part of the support body protrudes out of the outer edge of the back groove and generates elastic deformation when it abuts against the oral palate mucosa.

[0008] Further, the outer edge of the retainer close to the tooth apex is contracted inward and partially surrounds the edge of the tooth apex.

[0009] Further, at least two retainers are symmetrically arranged in the dental arch arrangement direction.

[0010] Further, the support body extends outward from the inside of the back groove and surrounds the palate-side connector.

[0011] Further, the support body is in a column shape, and the support body is arranged in an embedding hole which is opened through at the bottom of the back groove; wherein, the end of the support body close to the palate mucosa is in a dome shape.

[0012] Further, a ring groove is formed on the peripheral wall of the support body, and the support body is clamped in the embedding hole through the ring groove.

[0013] Further, the support body is in a conical column shape, and the conical end of the support body is arranged towards the palate mucosa side.

[0014] The utility model has the following beneficial effects compared with the prior art:

[0015] By fixing the retainer on the affected tooth, the palate-side connector is positioned and then close to the maxillary palate mucosa of the patient, and a flexible support body is arranged on the palate-side connector close to the palate mucosa so that it can support and abut against the palate mucosa instead of the palate-side connector, thereby avoiding the palate-side connector from squeezing and rubbing the oral palate mucosa of the patient and reducing the foreign body sensation in the patient's oral cavity; it can also prevent saliva, food residues, etc. from accumulating inside the palate-side connector and breeding bacteria in the oral cavity, affecting oral hygiene. Description of the Drawings

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are merely exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0017] Figure 1 Structural schematic diagram of a cantilever orthodontic appliance for posterior crossbite on the maxillary side of the oral cavity provided by the present invention;

[0018] Figure 2 For Figure 1 Bottom view of the orthodontic appliance in

[0019] Figure 3 For Figure 2 Cross-sectional view of the retainer on the tooth in

[0020] Figure 4 Structural schematic diagram of a cantilever orthodontic appliance for posterior crossbite on the mandibular side of the oral cavity provided by the present invention;

[0021] Figure 5 For Figure 1 Cross-sectional view of the palatal connector in the A-A direction in an embodiment of the present invention.

[0022] Figure 6 Cross-sectional view of the palatal connector in another embodiment of the present invention;

[0023] Figure 7 Cross-sectional view of the palatal connector in another embodiment of the present invention;

[0024] Figure 8 Cross-sectional view of the palatal connector in another embodiment of the present invention;

[0025] Figure 9 Cross-sectional view of the palatal connector in another embodiment of the present invention.

[0026] The reference numerals in the figure are respectively represented as follows:

[0027] 10, retainer; 20, connector; 21, tooth-side connector; 22, palatal connector; 23, back groove; 24, support body; 25, insertion hole; 30, cantilever body; 40, tooth. Specific embodiments

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] As Figure 1 shown, the present utility model provides a cantilever orthodontic appliance for posterior crossbite, including:

[0030] A retainer 10, which is in a ring shape and is adhesively sleeved on the circumference of a tooth 40 and partially surrounds the tooth apex;

[0031] A connecting body 20, the connecting body 20 includes a buccal connecting body 21 and a palatal connecting body 22. The buccal connecting body 21 is connected between the retainers 10 on the same side. The buccal connecting body 21 is close to the inner side of the dental arch and surrounds a partial axial surface of the tooth. The palatal connecting body 22 is connected between the retainers 10 on the opposite sides, and the palatal connecting body 22 is in an arc shape and is close to the palatal mucosa;

[0032] A cantilever body 30, the cantilever body 30 extends from the retainer 10 / connecting body 20 deep into the dental arch, and the cantilever body 30 is arranged on the buccal side / palatal side; the cantilever body 30 is tensioned and connected to a lingual button / buccal tube fixed on the dental arch through a rubber chain fixed thereon, so that the tension force of the rubber chain 32 acts on the affected tooth through the retainer 10 and the connecting body 20 for correction;

[0033] Wherein, both sides of the palatal connecting body 22 are bent inward to form a back groove 23, the back groove 23 faces the palatal mucosa of the oral cavity, and a support body 24 is arranged in the back groove 23 and extends along its path. A part of the support body 24 is embedded in the back groove 23 to form a fixation, and another part of the support body 24 protrudes from the outer edge of the back groove 23 and generates elastic deformation when it abuts against the palatal mucosa of the oral cavity.

[0034] The cantilever orthodontic appliance for posterior crossbite provided by the present utility model includes orthodontic appliances respectively worn on the upper jaw and the lower jaw for crossbite correction. The orthodontic appliance is supported and fixed on the affected tooth through the retainer 10, and the palatal connecting body 22 is positioned and then close to the upper jaw or the lower jaw of the patient. A flexible support body 24 is arranged on the palatal connecting body 22 close to the palatal side so that the palatal connecting body 22 can support and abut against the palatal mucosa, thereby avoiding extrusion and friction between the palatal connecting body 22 and the palatal mucosa of the patient's oral cavity and enhancing the foreign body sensation in the patient's oral cavity; it can also prevent the accumulation of saliva, food residues, etc. inside the palatal connecting body 22, and the growth of bacteria in the oral cavity, affecting oral hygiene.

[0035] In the actual practical process of the utility model, it should be noted that since the orthodontic processes for posterior crossbite and reverse crossbite are basically the same, in this embodiment, the orthodontic process for posterior crossbite is taken as an example. For the orthodontics of reverse crossbite, it can be achieved by simply swapping the positions of the upper and lower dental appliances, and this process will not be elaborated here. Specifically, the maxillary appliance in the cantilevered appliance provided by the present utility model is used in the maxillary space of the human oral cavity. Preferably, it is worn with a cantilever body 30 arranged on the inner side of the dental arch and a buccal tube arranged on the outer side of the dental arch. A rubber chain is pulled between the cantilever body 30 and the buccal tube, so that the whole appliance generates prestress through the force received at the end of the cantilever body 30 for the correction of the affected tooth, and the affected tooth that was originally skewed towards the inside of the oral cavity is corrected to a position where it can bite with the lower teeth. For the mandibular appliance, it is used in the mandibular space of the human oral cavity. Preferably, it is worn with a cantilever body 30 arranged on the outer side of the dental arch and a lingual button arranged on the inner side of the dental arch. A rubber chain is pulled between the cantilever body 30 and the lingual button, so that the whole appliance generates prestress through the force received at the end of the cantilever body 30 for the correction of the affected tooth, and the affected tooth that was originally skewed towards the buccal side of the oral cavity is corrected to a vertical position where it can bite with the upper teeth. Through the coordinated cooperation between the cantilevered maxillary / mandibular appliances, the orthodontic purpose of correcting the locked state of the upper and lower teeth in the patient's oral cavity is achieved, enabling it to reach a better occlusal state and restore the occlusal function.

[0036] In order to enable the appliance to be fixed on the patient's dental arch and reduce the damage to the gums, please refer to Figure 3 As shown, in the preferred embodiment provided by the present utility model based on the above embodiment, the outer edge of the retainer 10 near the tooth apex is retracted inward and partially surrounds the tooth apex edge.

[0037] In this embodiment, the retracted outer edge of the retainer 10 can surround the tooth apex edge, and at the same time, the contact surface between the inner side of the retainer 10 and the tooth is made as wide as possible, so as to facilitate bonding it to the tooth with glass ionomer cement subsequently, thereby enabling the whole appliance to be fixed and supported on the dental arch by the retainer 10 and improving the stability of wearing the appliance.

[0038] In order to be able to orthodontically treat multiple affected teeth on the patient's dental arch simultaneously, please refer to Figure 1-2 As shown, in the preferred embodiment provided by the present utility model based on the above embodiment, at least two retainers 10 are symmetrically arranged in the dental arch arrangement direction.

[0039] In this embodiment, the position of the retainer 10 can be adjusted according to the actual tooth locking deformity of the patient. Generally speaking, the locked teeth appear symmetrically on both sides of the dental arch, so preferably, the retainers 10 are symmetrically arranged in the dental arch arrangement direction.

[0040] In order to avoid saliva accumulating in the fitting gap between the support body 24 and the palatal connector 22 and affecting oral hygiene, asFigure 6 As shown, in the preferred embodiment provided by the present utility model based on the above embodiment, the support body 24 extends outward from the inside of the back groove 23 to surround the palatal connector 22.

[0041] In this embodiment, the palatal connector 22 and the back groove 23 thereon are surrounded by the support body 24, so that the back groove 23 can be closed, thereby avoiding the generation of accumulated fluid inside it, which is beneficial to maintaining oral hygiene.

[0042] In order to form a flexible support between the palatal connector 22 and the oral palatal mucosa, in another embodiment provided by the present utility model, as Figure 7 shown, the support body 24 is columnar, and the support body 24 is arranged in the embedding hole 25 opened through the bottom of the back groove 23; wherein, the end of the support body 24 close to the palatal mucosa is dome-shaped.

[0043] In this embodiment, the columnar support body 24 is symmetrically arranged on the back groove 23, and the support body 24 forms a flexible support between the palatal connector 22 and the oral palatal mucosa. The magnitude of the support force on the oral palatal mucosa side can be adjusted by adjusting the number, height, and diameter of the support body 24, and it can better adapt to different installation positions of the orthodontic appliance in the patient's oral cavity.

[0044] In order to improve the support force of the support body 24 on the palatal mucosa, as Figure 8 shown, in the preferred embodiment provided by the present utility model based on the above embodiment, the support body 24 is conical columnar, and the conical end of the support body 24 is arranged towards the palatal mucosa side.

[0045] In order to facilitate the installation and disassembly of the support body 24 on the palatal connector 22, as Figure 9 shown, in the preferred embodiment provided by the present utility model based on the above embodiment, an annular groove is opened on the peripheral wall of the support body 24, and the support body 24 is clamped in the embedding hole 25 through the annular groove.

[0046] The difference between the cantilever orthodontic appliance for posterior crossbite provided by the present utility model when applied to the upper jaw and the lower jaw of a patient is as follows:

[0047] In the mandibular space of the patient, as Figure 4 shown, the cantilever body 30 is arranged close to the outer side of the periodontium of the mandibular dentition. The cantilever body 30 is formed on the retainer 10 and extends towards the depth of the dentition. The cantilever body 30 extends along the tangent direction of the retainer 10; a lingual button opposite to the position of the cantilever body 30 is arranged on the inner side of the teeth of the mandibular dentition. The cantilever body 30 is connected to the lingual button through a rubber chain fixed by passing through it and is tensioned, so that the tension force of the rubber chain acts on the affected tooth through the retainer 10 and the connector 20 for correction;

[0048] Or, in the maxillary space of the patient, as Figure 1-2As shown, the cantilever 30 is disposed close to the inner side of the periodontium of the maxillary dentition. The cantilever 30 is formed at the end of the connecting body 20 and extends deep into the dentition. A buccal tube opposite to the position of the cantilever 30 is provided on the outer side of the teeth of the maxillary dentition. The cantilever 30 is connected to the buccal tube through a rubber chain fixed by passing through it and is tensioned, so that the tension force of the rubber chain acts on the affected tooth through the retainer 10 and the connecting body 20.

[0049] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A cantilever appliance for posterior crossbite, characterized in that, Comprising: A retainer (10), which is sleeved and bonded in a circular shape around the circumference of a tooth (40) and partially surrounds the tooth apex; A connector (20), the connector (20) includes a buccal connector (21) and a palatal connector (22), the buccal connector (21) is connected between the retainers (10) on the same side, the buccal connector (21) is close to the inner side of the dental arch and surrounds a partial axial surface of the tooth; the palatal connector (22) is connected between the retainers (10) on the opposite sides, and the palatal connector (22) is arc-shaped and close to the palatal mucosa; A cantilever (30), the cantilever (30) extends deep into the dental arch from the retainer (10) / connector (20), and the cantilever (30) is arranged on the buccal side / palatal side; the cantilever (30) is tensioned and connected to a lingual button / buccal tube fixed on the dental arch through a rubber chain fixed thereon, so that the tension force of the rubber chain (32) acts on the affected tooth through the retainer (10) and the connector (20) for orthodontics; Wherein, both sides of the palatal connector (22) are bent inward to form a back groove (23), the back groove (23) faces the oral palatal mucosa, and a support body (24) is arranged in the back groove (23) along its path; a part of the support body (24) is embedded in the back groove (23) to form a fixation, and another part of the support body (24) protrudes from the outer edge of the back groove (23) and generates elastic deformation when it abuts against the oral palatal mucosa.

2. An cantilever orthodontic appliance for posterior crossbite according to claim 1, wherein The outer edge of the retainer (10) near the tooth apex is retracted inward and partially surrounds the edge of the tooth apex.

3. An cantilever orthodontic appliance for posterior crossbite according to claim 2, wherein At least two retainers (10) are symmetrically arranged in the dental arch arrangement direction.

4. An cantilever orthodontic appliance for posterior crossbite according to claim 3, wherein The support body (24) extends outward from the inside of the back groove (23) to surround the palatal connector (22).

5. An cantilever orthodontic appliance for posterior crossbite according to claim 1, wherein The support body (24) is columnar, and the support body (24) is arranged in an embedding hole (25) opened through the bottom of the back groove (23); Wherein, the end of the support body (24) close to the palatal mucosa is dome-shaped.

6. An cantilever orthodontic appliance for posterior crossbite according to claim 5, wherein A ring groove is formed on the peripheral wall of the support body (24), and the support body (24) is clamped in the embedding hole (25) through the ring groove.

7. An cantilever orthodontic appliance for posterior crossbite according to claim 6, wherein The support body (24) is conical columnar, and the conical end of the support body (24) is arranged towards the palatal mucosa side.

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