Accessory capable of effectively reducing occurrence rate of sleeve disengagement and improving overall moving efficiency of teeth

Abstract

An accessory capable of effectively reducing the occurrence rate of sleeve falling and improving the overall moving efficiency of teeth comprises an accessory body, the accessory body is provided with a gingival part and a vertical part, and the vertical part comprises a mesial part located in the mesial part of a dental crown and a distal part located in the distal part of the dental crown; the gingival square part is close to the gingival margin and is positioned slightly below the undercut of the dental crown; each of the gingival square part and the vertical part is provided with a tongue side surface and a cheek side surface which are oppositely arranged, a joint side surface and a gingival side surface which are oppositely arranged, and a mesial surface and a distal surface which are oppositely arranged; the tongue side surface is adhered to the tooth surface; the gingival side surface, the conjunctival side surface, the mesial surface and the distal surface are all cambered surface-shaped or spherical, so that the undercut of teeth is greatly increased, the orthodontic appliance has contact areas in multiple directions and a larger force application area, and more effective wrapping areas are provided for mesial or distal movement of the teeth; the occurrence rate of the sleeve falling problem can be effectively reduced, and the overall tooth moving efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of orthodontics, and particularly relates to an attachment that can effectively reduce the incidence of detachment and improve the overall tooth movement efficiency. Background Art

[0002] Removable clear aligners have been favored by patients and doctors due to their aesthetic appearance, comfort, and visualizable tooth movement process. Their indications have expanded from initially mild malocclusions to more complex malocclusions that require tooth extraction for treatment. The essence of a clear aligner is a removable appliance, and its stable retention force and appropriate force application area are the basis for exerting its corrective force and achieving tooth movement. In addition, due to the material limitations of clear aligners, clear aligner orthodontics is relatively weak in controlling root movement, and more often involves the tipping movement of the crown.

[0003] Compared with the anatomical morphology of premolars and molars, the buccal morphology of canines is smoother and lacks undercuts, making it difficult for clear aligners to effectively clasp and wrap around the crown. Its morphology makes it relatively weak in resisting the dislodging force of the appliance during tooth movement. In addition, compared with the width difference between premolars and canines in the coronal plane, the width difference between canines and lateral incisors in the coronal plane is smaller. Coupled with the smoother buccal morphology of canines, there is no effective wrapping area for applying thrust during the distal movement of canines by clear aligners, and it is more difficult to apply a corrective force to canines. Therefore, the control of the root is even weaker. Therefore, during the distal movement of canines in extraction cases, "detachment" problems and tipping movements of teeth are more likely to occur. The overall distal movement efficiency of canines is low, and it is difficult to restore the original axial inclination after reaching the target position. Similarly, when moving premolars or molars mesially or distally, the same problems exist. The device of the present invention can also be used for the overall movement of molars and premolars, reducing the incidence of detachment and increasing the overall movement efficiency while effectively controlling the original axial inclination. Summary of the Invention

[0004] To overcome the deficiencies of the above prior art, the purpose of the present invention is to provide an attachment that can effectively reduce the incidence of detachment and improve the overall tooth movement efficiency. The present invention can increase tooth undercuts. During clear aligner orthodontics, the incidence of detachment problems can be reduced and the overall tooth movement efficiency can be improved by changing the tooth morphology, effectively controlling the axial inclination of teeth, and having the characteristics of convenient operation, practicality, and high efficiency.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: An attachment that can effectively reduce the incidence of detachment and improve the overall tooth movement efficiency, including an attachment body. It is characterized in that the attachment body has a gingival part and a vertical part. The vertical part includes a mesial part located mesial to the tooth crown and a distal part located distal to the tooth crown. The gingival part is close to the gingival margin and is slightly below the undercut of the tooth crown. Both the gingival part and the vertical part have a lingual surface and a buccal surface that are oppositely arranged, an occlusal surface and a gingival surface that are oppositely arranged, and a mesial surface and a distal surface that are oppositely arranged. The lingual surface is bonded to the tooth surface.

[0006] The lingual surface is bonded to the tooth surface. The mesial surface, distal surface, and occlusal surface are all spherical or elliptical, and the gingival surface is an arc shape that is consistent with the gingival margin of the canine, and is arranged towards the gingival side. Its cross-section is similar to a Ω shape or a semi-circular shape and its variants, or has a relatively narrowed neck.

[0007] Taking the canine as an example, the gingival part of the attachment body is located gingival to the tooth crown (slightly below the undercut on the buccal surface of the tooth crown). The vertical part of the attachment body is located mesial and distal to the tooth crown. The gingival part of the attachment body is an arc shape that is consistent with the gingival margins of the premolars and molars. By changing the tooth morphology and increasing the undercut of the tooth, the purpose of reducing the incidence of detachment is achieved. Its vertical part includes a mesial part and a distal part. The mesial part is close to the mesial-buccal turning point of the tooth crown, and the distal part is close to the distal-buccal turning point of the tooth crown. By changing the tooth morphology, the effective wrapping area of the appliance on the tooth during mesial or distal movement is increased, and the "pushing" corrective force of the invisible appliance is more effectively expressed, effectively improving the overall tooth movement efficiency.

[0008] When the vertical part is located mesial to the tooth crown, it is close to the mesial-buccal turning point of the tooth crown.

[0009] When the vertical part is located distal to the tooth crown, it is close to the distal-buccal turning point of the tooth crown.

[0010] The occlusal surfaces of the gingival part and the vertical part are arc-shaped, and the wall surface of the occlusal surface is perpendicular or inclined to the tooth surface.

[0011] The attachment body is a U-shaped caterpillar attachment. The gingival surfaces of the gingival part and the vertical part are arc-shaped, and the wall surface of the gingival surface is perpendicular or inclined to the tooth surface.

[0012] The mesial surfaces of the gingival part and the vertical part are arc-shaped, and the wall surface of the mesial surface is perpendicular or inclined to the tooth surface.

[0013] The distal surfaces of the gingival part and the vertical part are arc-shaped, and the surface of the distal surface is perpendicular or inclined to the tooth surface.

[0014] The buccal surfaces of the gingival part and the vertical part are arc-shaped.

[0015] The described U-shaped caterpillar attachment has a neck thickness of 1 - 1.5 mm and an overall thickness of 3 - 4 mm.

[0016] The beneficial effects of the present invention are as follows: Since the present invention increases the thickness of the undercut on the gingival side of the buccal side of the tooth, and the buccolingual thickness of the mesial and distal buccal sides, it changes the crown shape of the tooth, resulting in a larger and more prominent effective wrapping area between the tooth and the orthodontic appliance on the gingival side, mesial, and distal of the crown. This reduces the incidence of the problem of appliance detachment while improving the overall mesial and distal movement efficiency of the tooth in the case of extraction orthodontics with clear aligners, and effectively controls the axial inclination of the tooth. It has the characteristics of simple operation, practical and efficient, can effectively prevent appliance detachment, improve the efficiency of overall movement, and control the axial inclination of the tooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the attachment of the present invention bonded to the canine tooth.

[0018] Figure 2 It is a schematic diagram of the attachment of the present invention bonded to the premolar.

[0019] Figure 3 It is a schematic diagram of the attachment of the present invention bonded to the molar.

[0020] Figure 4 It is a schematic diagram of the attachment of the present invention bonded in the dental arch.

[0021] Figure 5 It is a schematic diagram of the attachment body.

[0022] Figure 6 It is a schematic diagram of the distal surface and mesial surface of the present invention.

[0023] In the figure: 1 - attachment body, 11 - mesial surface, 12 - distal surface, 13 - occlusal surface, 14 - gingival surface, 15 - lingual surface, 16 - buccal surface, 17 - cross-section of the attachment body, 2 - tooth, 3 - gingival part, 4 - vertical part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the following will be described with reference to the drawings in the embodiments of the present invention. In addition, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present invention.

[0025] See Figure 1-2 , this embodiment provides an attachment that can effectively reduce the incidence of appliance detachment and improve the overall movement efficiency of the tooth, so as to Figure 1Taking the middle tooth 2 as an example, it includes an attachment body 1. The attachment body has a gingival part 3 and a vertical part 4. The attachment body has a mesial surface 11 and a distal surface 12 which are oppositely arranged, an occlusal surface 13 and a gingival surface 14 which are oppositely arranged, and a lingual surface 15 and a buccal surface 16 which are oppositely arranged. The overall shape of the attachment body is a U shape that is upright or vertically flipped. Further, the lingual surface 15 is bonded to the tooth surface, preferably but not limited to being bonded to the buccal surface of the tooth. Further, the walls of the mesial surface 11, the distal surface 12, the occlusal surface 13, and the gingival surface 14 are perpendicular or inclined to the tooth surface, and the mesial surface 11, the distal surface 12, the occlusal surface 13, and the gingival surface 14 are in the shape of circular or elliptical arc surfaces. Further, the gingival surface 14 is an arc shape that is consistent with the shape of the tooth gingival margin. Further, the cross-section 17 of its attachment body is similar to Ω or semi-circular, or similar to variants (deformations) of Ω and semi-circular.

[0026] The overall thickness of the attachment body 1 is 3 - 4 mm. In specific implementation, the length, height, and position of the attachment body 1 can be flexibly changed according to the size of the tooth 2, and its overall shape can also be changed into a "J" shape or its variants; The material of the attachment body 1 is resin, that is, it is bonded by resin and is fixed on the tooth surface by the adhesive force between the resin and the tooth.

[0027] An attachment that can effectively reduce the incidence of detachment and improve the overall tooth movement efficiency includes an attachment body 1. The attachment body has a gingival part and a vertical part. The vertical part includes a mesial part located mesial to the tooth crown and a distal part located distal to the tooth crown; the gingival part is close to the gingival margin and is located slightly below the undercut of the tooth crown; both the gingival part and the vertical part have a lingual surface and a buccal surface which are oppositely arranged, an occlusal surface and a gingival surface which are oppositely arranged, and a mesial surface and a distal surface which are oppositely arranged; the lingual surface is bonded to the tooth surface.

[0028] When the mesial part of the vertical part is located mesial to the tooth crown, it is close to the mesial buccal turning point of the tooth crown.

[0029] When the distal part of the vertical part is located distal to the tooth crown, it is close to the distal buccal turning point of the tooth crown.

[0030] The occlusal surfaces of the gingival part and the vertical part are in the shape of arc surfaces, and the walls of the occlusal surfaces are perpendicular or inclined to the tooth surface.

[0031] The mesial surface and the distal surface are relative; in a dental arch, the side close to the midline is mesial, and the side far from the midline is distal; In the vertical part, the part located mesial to the tooth is called the mesial part, and the part located distal to the tooth is called the distal part; and in the mesial part and the distal part, the surface located mesial is the mesial surface, and the surface located distal is the distal surface.

[0032] The accessory body described above is a U-shaped caterpillar accessory; the gingival part and the gingival side of the vertical part are arc-shaped, and the wall surface of the gingival side is perpendicular or inclined to the tooth surface.

[0033] The mesial surface of the gingival part and the vertical part is arc-shaped, and the wall surface of the mesial surface is perpendicular or inclined to the tooth surface.

[0034] The distal surface of the gingival part and the vertical part is arc-shaped, and the surface of the distal surface is perpendicular or inclined to the tooth surface.

[0035] The buccal surface of the gingival part and the vertical part is arc-shaped.

[0036] For the U-shaped caterpillar accessory described above, the thickness of its neck is 1.0 - 1.5 mm, and the overall thickness is 3 - 4 mm.

[0037] See Figure 1 , Figure 1 Among them, the first view from the left is the buccal surface view of the canine, the second view is the mesial surface view of the canine, the third view is the occlusal surface view of the canine, and the fourth view is several deformation views of the cross-section of the accessory body.

[0038] See Figure 2 , Figure 2 Among them, the first view from the left is the buccal surface view of the mandibular first premolar, the second view is the mesial surface view of the mandibular first premolar; the third view is the occlusal surface view of the mandibular first premolar; See Figure 3 , Figure 2 Among them, the first view from the left is the buccal surface view of the mandibular first molar, the second view is the mesial surface view of the mandibular first molar, and the third view is the occlusal surface view of the mandibular first molar.

[0039] The working principle of the present invention is: Taking the canine tooth as an example, compared with the anatomical morphology of premolars and molars, the buccal morphology of the canine tooth is smoother and lacks undercuts, making it difficult for the invisible orthodontic appliance to effectively clasp and wrap the tooth crown. Its morphology makes it relatively weak in resisting the dislodging force of the appliance during tooth movement. In addition, compared with the width difference between premolars and canines in the coronal plane, the width difference between canines and lateral incisors in the coronal plane is smaller. Coupled with the smoother buccal morphology of the canine tooth, there is no effective wrapping area for applying thrust during the distal movement of the canine tooth by the invisible orthodontic appliance, and it is more difficult to apply orthodontic force to the canine tooth. Therefore, the control of the tooth root is weaker. Therefore, during the distal movement of the canine tooth in extraction cases, "slipping off" problems and inclined movement of the tooth are more likely to occur. The overall distal movement efficiency of the canine tooth is low, and it is difficult to restore the original axial inclination after reaching the target position. The present invention increases the undercuts in the gingival direction of the tooth and the buccolingual width of the tooth, increasing the retention force of the invisible dental appliance in the occlusogingival direction and the "pushing" area in the mesiodistal direction, enabling the invisible dental appliance to better apply thrust to the tooth. One difference from general attachments is that the vertical part of the present invention changes the tooth morphology in the mesial and distal directions of the tooth, and the area where the pushing surface is increased is close to the mesial and adjacent surface transition and the distal and adjacent surface transition of the tooth, making up for the defect of tooth morphology in the mesiodistal movement to a certain extent. The present invention makes the tooth more in line with the force application principle of the invisible dental appliance, better improving the mesial and distal movement efficiency of the tooth and achieving the overall movement of the tooth.

[0040] In addition, the embodiments described above are only a part of the embodiments of the present application, rather than all embodiments. The accompanying drawings show the preferred embodiments of the present application, but do not limit the patent scope of the present application. The U-shaped caterpillar-shaped attachment body 1 is applicable to teeth with smooth buccolingual tooth morphology and small undercuts, not limited to canine teeth, and can also be used for premolars and molars, etc. Further, the cross-section of the U-shaped caterpillar-shaped attachment body 1 is similar to an Ω shape or a semicircle, but can be a variant thereof, not limited to its narrowed neck; further, the overall shape and size of the attachment body 1 are adjusted according to the tooth shape, not limited to the U shape; further, the attachment body 1 can also be used to improve the overall movement efficiency of mesial tooth movement, not limited to distal movement.

Claims

1. An attachment that can effectively reduce the incidence of stripping and improve the overall tooth movement efficiency, including an attachment body, characterized in that, The attachment body has a gingival part and a vertical part. The vertical part includes a mesial part located mesial to the tooth crown and a distal part located distal to the tooth crown. The gingival part is close to the gingival margin and is slightly below the undercut of the tooth crown. Both the gingival part and the vertical part have a lingual surface and a buccal surface arranged opposite to each other, an occlusal surface and a gingival surface arranged opposite to each other, and a mesial surface and a distal surface arranged opposite to each other. The lingual surface is bonded to the tooth surface.

2. The attachment according to claim 1, which can effectively reduce the incidence of stripping and improve the overall tooth movement efficiency, is characterized in that, When the vertical part is located mesial to the tooth crown, it is close to the mesiobuccal turning point of the tooth crown.

3. The attachment according to claim 1, which can effectively reduce the incidence of stripping and improve the overall tooth movement efficiency, is characterized in that When the vertical part is located distal to the tooth crown, it is close to the distobuccal turning point of the tooth crown.

4. The attachment according to claim 1, which can effectively reduce the incidence of stripping and improve the overall tooth movement efficiency, is characterized in that, The occlusal surfaces of the gingival part and the vertical part are arc-shaped, and the wall surfaces of the occlusal surfaces are perpendicular or inclined to the tooth surface.

5. The attachment according to claim 1, which can effectively reduce the incidence of stripping and improve the overall tooth movement efficiency, is characterized in that The attachment body is a U-shaped caterpillar attachment. The gingival surfaces of the gingival part and the vertical part are arc-shaped, and the wall surfaces of the gingival surfaces are perpendicular or inclined to the tooth surface.

6. The attachment according to claim 1, which can effectively reduce the incidence of stripping and improve the overall tooth movement efficiency, is characterized in that, The mesial surfaces of the gingival part and the vertical part are arc-shaped, and the wall surfaces of the mesial surfaces are perpendicular or inclined to the tooth surface.

7. The attachment according to claim 1, which can effectively reduce the incidence of stripping and improve the overall tooth movement efficiency, is characterized in that The distal surfaces of the gingival part and the vertical part are arc-shaped, and the surfaces of the distal surfaces are perpendicular or inclined to the tooth surface.

8. The attachment according to claim 1, which can effectively reduce the incidence of stripping and improve the overall tooth movement efficiency, is characterized in that, The buccal surfaces of the gingival part and the vertical part are arc-shaped.

9. The attachment according to claim 1, which can effectively reduce the incidence of stripping and improve the overall tooth movement efficiency, is characterized in that, For the U-shaped caterpillar attachment, its neck thickness is 1.0 - 1.5 mm and the overall thickness is 3 - 4 mm.

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